POWDER-TYPE UNMANNED AUTOMATIC FIRE EX¬

TINGUISHING AND EMERGENCY INJECTION APPARATUS Technical Field [1] The present invention relates, in general, to a powder-type unmanned automatic fire extinguishing and emergency injection apparatus, and, more particularly, to a powder- type unmanned automatic fire extinguishing and emergency injection apparatus which senses the outbreak of a fire as soon as the fire breaks out and reports it to the nearest fire control center through a wireless communication network, and in which a pressure-resistant water tank in which a remote controllable pump is installed is provided to supply fire extinguishing water, wherein, when the pump does not operate, pressure is generated in the pressure-resistant water tank through the detonation of a small-sized powder detonating device which is installed in advance in the pressure- resistant water tank, so that water can be automatically sprinkled through at least one sprinkler corresponding to a fire outbreak area. [2] Background Art [3] Generally, in places remote from populated areas, such as forests, industrial storage yards, condominiums, cottages, and ships which have lost power due to accidents, if a fire breaks out, it is difficult and takes a long time to quickly move equipment and materials for extinguishing the fire. [4] Also, once a fire breaks out, due to a power failure, etc., it may be difficult to secure energy required for operating the fire extinguishing equipment. [5] If a fire breaks out in forests, as one way of extinguishing the fire, a helicopter can be used. However, because the helicopter costs a lot and requires a high maintenance fee, it is difficult to secure the required budget, and the helicopter may crash due to mountainous topography or sudden gusts of wind, whereby lives may be lost. [6] Further, the time for reaching the location of the fire after the fire breaks out cannot but be lengthened due to rugged topography and a long distance, resulting in a delay in extinguishing the fire, so that proper fire fighting work cannot be implemented before the range of the fire has significantly enlarged. [7] Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a powder-type unmanned automatic fire extinguishing and emergency injection apparatus which senses the outbreak of a fire as soon as the fire breaks out and reports it to the nearest fire control center through a wireless communication network, and in which a pressure-resistant water tank in which a remote controllable pump is installed is provided to supply fire extinguishing water, wherein, when the pump does not operate, pressure is generated in the pressure-resistant water tank through the detonation of a small-sized powder detonating device which is installed in advance in the pressure-resistant water tank, so that water can be automatically sprinkled through at least one sprinkler corresponding to a fire outbreak area. [9] Technical Solution [10] In order to achieve the above object, according to one aspect of the present invention, there is provided a powder-type unmanned automatic fire extinguishing and emergency injection apparatus, comprising a high pressure water feeding pump for feeding water from a water feeding source; a water feeding pump driving section for operating the water feeding pump; a pressure-resistant water tank for storing chemical liquid or water fed from the high pressure water feeding pump; a local fire heat sensor installed at a location where a fire is likely to break out, to sense the outbreak of a fire; at least one powder detonating device disposed in the pressure-resistant water tank; at least one local sprinkler connected to an output side of the pressure-resistant water tank to sprinkle water stored in the pressure-resistant water tank on a place where a fire has broken out; and a control circuit block for receiving fire outbreak information from the local fire heat sensor and controlling the water feeding pump driving section, the powder detonating device and the local sprinkler through wired or wireless com¬ munication. [11] According to another aspect of the present invention, two or more powder detonating devices are arranged in the pressure-resistant water tank to be sequentially detonated under the control of the control circuit block. [12] According to still another aspect of the present invention, the powder detonating device is connected to a sheathed powder train laid out in the place at which a fire is anticipated to break out, and the sheathed powder train is covered by a perforated metal pipe which has on an outer surface thereof a plurality of perforations. [13] According to yet still another aspect of the present invention, the apparatus is disposed in a ship, and a water discharge port which is defined at a bottom of the pressure-resistant water tank is used as propelling means for rescue of the ship in distress. [14] Brief Description of the Drawings [15] FlG. 1 is a piping diagram of a powder-type unmanned automatic fire extinguishing and emergency injection apparatus in accordance with an embodiment of the present invention; [16] FlG. 2 is the piping diagram shown in FlG. 1 which has electric circuits added thereto; and [17] FlG. 3 is an exploded perspective view illustrating a local fire heat sensor shown in FlG. 1. [18] Best Mode for Carrying Out the Invention [19] Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components. [20] FlG. 1 is a piping diagram of a powder-type unmanned automatic fire extinguishing and emergency injection apparatus in accordance with an embodiment of the present invention. Referring to FlG. 1, the apparatus according to the present invention includes a water feeding pump driving section 100, a high pressure water feeding pump 104, a water feeding source 106, a pressure-resistant water tank 200, local sprinklers 303, and a control circuit block 500. [21] In the water feeding pump driving section 100, in order to drive the high pressure water feeding pump 104, a motor 102 or an internal combustion engine 103 (a gasoline engine or a Diesel engine) which serves as a driving source is selectively operated depending upon a situation. [22] Accordingly, electricity for operating the motor 102 and gasoline fuel or Diesel oil for operating the internal combustion engine 103 must be supplied to the water feeding pump driving section 100. [23] The water feeding pump driving section 100 performs two functions of feeding fire extinguishing water when a local fire heat sensor 304 senses the outbreak of a fire and of replenishing water or chemical liquid in the pressure-resistant water tank 200 when the water level in the pressure-resistant water tank 200 decreases below a pre¬ determined value. [24] A DC generator 107 is installed in the water feeding pump driving section 100. The electricity generated in the DC generator 107 is stored in a battery 404 to be supplied to valve actuators and control circuits which will be described later. [25] Whether or not the DC generator 107 is operating is used as a basis for recognizing whether or not the high pressure water feeding pump 104 is operating. [26] A normal AC power source 400 receives power from an electric power company and then supplies the power to the motor 102, a transformer 402, a rectifier 403, the battery 404, and so forth. The electric connection between the normal AC power source 400 and those component elements is effected by electric wires 401. These electric wires 401 are shown by the thin solid lines for distinguishing from pipe lines in a drawing. [27] The power supply connections to respective devices (including solenoid valves, power detonating devices, etc.) and electronically controlled logic circuits are not described herein. The electric wires used according to the present invention comprise sheathed heat-resistant and fire-resistant electric wires. [28] The transformer 402 is an electric device which adjusts the voltage to a level ap¬ propriate for the power of the control circuits. [29] The rectifier 403 converts AC power of the commercial AC power source 400 into DC power and then supplies the converted power to the control circuit block 500, the solenoid valves, and so forth. The DC power is stored in the battery 404. [30] The high pressure water feeding pump 104 which is operated by the water feeding pump driving section 100 makes suction of fire extinguishing water from the water feeding source 106. The high pressure water feeding pump 104 feeds the fire ex¬ tinguishing water to the pressure-resistant water tank 200 and then pressurizes the fire extinguishing water. [31] The water feeding source 106 is a place from which water capable of being used as fire extinguishing water can be obtained, such as a reservoir, river, stream, or swimming pool. [32] A water intake protection net 109 is installed in the water feeding source 106 to prevent foreign substances from entering the suction port of a water feeding pipe 101, one end of which is immersed in the water feeding source 106. [33] When immersing the water feeding pipe 101 in the water feeding source 106, a water level switch 110 is installed in the water feeding source 106 to sense the situation where the water level of the water feeding source 106 has decreased so as to be insufficient to feed water any further, and to send a signal of that status to the control circuit block 500. [34] The high pressure water feeding pump 104 is connected to the pressure-resistant water tank 200 through the water feeding pipe 101. A pump discharge valve 105, a check valve 108 and a tank inlet solenoid valve 201 are sequentially installed on the portion of the water feeding pipe 101 which extends between the high pressure water feeding pump 104 and the pressure-resistant water tank 200. [35] The water feeding pipe 101 extends not only between the high pressure water feeding pump 104 and the pressure-resistant water tank 200 but also through other portions of the piping diagram as shown by the thick solid lines in FlG. 1. [36] The pump discharge valve 105 is closed when implementing maintenance and repair work or performing a test for the high pressure water feeding pump 104, and otherwise always remains open. Since the pump discharge valve 105 is subject to high pressure, the pump discharge valve 105 has a predetermined degree of pressure resistance. [37] The check valve 108 functions to prevent the backflow of water which is fed from the high pressure water feeding pump 104. [38] Accordingly, in a system in which two or more pressure-resistant water tanks 200 are connected in parallel to the output side of the high pressure water feeding pump 104, check valves must be respectively installed on the input and output sides of each pressure-resistant water tank 200. [39] The tank inlet solenoid valve 201 which is installed on the input side of the pressure-resistant water tank 200 is always open except when the pressure-resistant water tank 200 is repaired or tested. [40] While the pressure-resistant water tank 200 serves as a kind of water tank for storing fire extinguishing water, the pressure-resistant water tank 200 must endure high pressure which develops therein due to the operation of the high pressure water feeding pump 104 or the operation of the powder detonating devices 205 and 206. [41] A water level decrease in the pressure-resistant water tank is sensed by a lower water level switch 202 which is installed in the pressure-resistant water tank 200. Further, an upper water level switch 209 senses the situation in which the pressure- resistant water tank 200 is sufficiently filled with water and it is not necessary to replenish water in the pressure-resistant water tank 200. [42] The high pressure water feeding pump 104 is operated or interrupted in its operation in response to a signal transmitted from the lower water level switch 202 and the upper water level switch 209. [43] In the system in which two or more pressure-resistant water tanks 200 are connected in parallel to the output side of the high pressure water feeding pump 104, the tank inlet solenoid valve 201 is installed for each pressure-resistant water tank 200, and when the upper water level switch 209 senses the upper water level, the tank inlet solenoid valve 201 closes in response to a signal transmitted from the upper water level switch 209. [44] The powder detonating devices 205 and 206 generate a predetermined range of gas pressure through a chemical reaction of powder which can be endured by the pressure- resistant water tank 200, to produce a force for pushing water or a fire extinguishing solution accommodated in the pressure-resistant water tank 200 to the local sprinklers 303. [45] This principle is similar to that for inflating an air bag in an automobile. [46] However, the detonating condition of the powder detonating devices 205 and 206 is set in a manner such that the powder detonating devices 205 and 206 can be detonated only when a fire breaks out and the high pressure water feeding pump 104 is not operated or not properly operated even though the local fire heat sensor 304 senses the outbreak of a fire, whereby sufficient pressure is not developed in the pressure- resistant water tank 200. [47] Once detonated, the powder detonating devices 205 and 206 must be replaced or re¬ plenished with powder immediately after a fire extinguishing procedure has been completed. [48] In this embodiment of the present invention, while two powder detonating devices 205 and 206 are installed, it is to be readily understood that three or more powder detonating devices may be installed in permissive pressure range of a tank or tanks. [49] However, in an operation sequence of the powder detonating devices, it is preferred that the second powder detonating device 206 be detonated only after the first powder detonating device 205 has operated and fully performed its function, to prevent the pressure-resistant water tank 200 from receiving an excessive detonation shock. [50] While the powder detonation devices 205 and 206 can be simply constructed in the same manner as the airbag of an automobile, the powder detonating devices 205 and 206 can be sophisticated in their construction so that, except for the water-related portions of the entire construction of the present invention, a miniature pressure- resistant casing which is composed only of electronically controlled logic circuits and powder detonating devices can replace the powder detonating devices to lengthen the lifetime and improve the performance of the powder detonating devices. [51] A pressure switch 203 is installed in the pressure-resistant water tank 200. The pressure switch 203 outputs a signal ensuring that a required pressure level be maintained in the pressure-resistant water tank 200 even if the pressure in the pressure- resistant water tank 200 changes due to the operation of the high pressure water feeding pump 104 or the powder detonating devices 205 and 206. Upper and lower limits can be set for the values indicated by the pressure switch 203. [52] An air vent valve 204 is installed on the top wall of the pressure-resistant water tank 200. The air vent valve 204 allows air existing in the pressure-resistant water tank 200 to be vented to the atmosphere when feeding water into the pressure-resistant water tank 200 so that water can be easily fed into the pressure-resistant water tank 200. The air vent valve 204 is normally opened and closed when a signal from the local fire heat sensor 304 is received upon the outbreak of a fire so that sprinkling pressure can be maintained in the pressure-resistant water tank 200. [53] Therefore, it is preferred that the air vent valve 204 be installed on the upper part of the pressure-resistant water tank 200. [54] As the air vent valve 204, a solenoid valve which can be easily controlled through an electric signal may be used. [55] A safety valve 207 is also installed in the pressure-resistant water tank 200, so that, when the pressure in the pressure-resistant water tank 200 increases to dangerous levels, the safety valve 207 which is normally closed can be opened to dissipate the pressure to the atmosphere and thereby prevent the pressure-resistant water tank 200 from breaking. [56] A water discharge valve 208 is installed at the bottom of the pressure-resistant water tank 200 so that the water discharge valve 208 can be opened when it is necessary to clean or empty the pressure-resistant water tank 200. Hence, the water discharge valve 208 is closed normally and when a fire breaks out. [57] In the case that the present invention is applied to a ship, the water discharge valve 208 is connected to an emergency injection device which is separately added, to be used as an emergency injection valve. [58] A cylinder type shock absorbing chamber 210 is installed at a side of the pressure- resistant water tank 200 to prevent excessive shock from being applied to the pressure- resistant water tank 200 when the powder detonating devices 205 and 206 are operated. [59] A space defined in the cylinder type shock absorbing chamber 210 is divided by a piston movably fitted therein into a first space which communicates with the pressure- resistant water tank 200 and a second space in which returning means such as a spring is provided, so that the water pressure applied from the pressure-resistant water tank 200 can be absorbed as the returning means is compressed and the second space is decreased. [60] A tank output side valve 211 is installed on an output side of the pressure-resistant water tank 200. The tank output side valve 211 is closed when installing, replacing, repairing or cleaning the pressure-resistant water tank 200, and is normally open. [61] A regional sprinkler piping section 301 is connected to the tank output side valve 211 of the pressure-resistant water tank 200 to interconnect the local sprinklers 303 assigned to respective local areas. The regional sprinkler piping section 301 comprises a pressure-resistant water feeding pipe. [62] The length of the regional sprinkler piping section 301 can be changed depending upon the number of local sprinklers 303. [63] Sprinkler solenoid valves 302 are installed for the respective local sprinklers 303 to permit or interrupt the process of fire extinguishing. [64] Each sprinkler solenoid valve 302 is normally closed, and opens in response to the signal transmitted from the local fire heat sensor 304 when a fire breaks out in a local area. In this way, it is possible to selectively sprinkle fire extinguishing water in a local area where a fire has broken out. [65] If the temperature of the local fire heat sensor 304 decreases to a predetermined level as a result of sufficient sprinkling in the local area, a signal is transmitted to the corresponding sprinkler solenoid valve 302 to close it. [66] The local sprinkler 303 comprises a sprinkler or a nozzle through which water or a fire extinguishing solution is injected. [67] The local fire heat sensors 304 define a plurality of sets in cooperation with the regional sprinkler piping section 301, the sprinkler solenoid valves 302 and the local sprinklers 303, which sets are distributed over respective local areas to prevent the fire from spreading. [68] When the atmospheric temperature falls below zero, in order to prevent freezing of the regional sprinkler piping section 301 (comprising the pressure-resistant water feeding pipe), an atmospheric temperature sensor 502 (see FlG. 2) transmits a signal for operating an insulated-type heating cable 306 which is installed on the regional sprinkler piping section 301. [69] The pressure-resistant water feeding pipe constituting the regional sprinkler piping section 301 which connects the pressure-resistant water tank 200 with respective local sprinklers 303 is always filled with water. If the atmospheric temperature falls below zero in the wintertime, the regional sprinkler piping section 301 may freeze or become clogged, thus deteriorating the sprinkling function. In this consideration, the insulated- type heating cable 306 is wound around the regional sprinkler piping section 301. [70] FlG. 2 is the piping diagram shown in FlG. 1 which has electric circuits added thereto. In this embodiment of the present invention, only the connective relationship between the piping diagram and the electric circuits will be described, and the detailed description of the electric circuits will be omitted. [71] Once a fire breaks out, the local fire heat sensor 304 assigned to the corresponding local area transmits a signal to the corresponding solenoid valve 302. As a result, first, the solenoid valve 302 is opened to allow water to be sprinkled onto the fire outbreak area. [72] Second, a signal is transmitted to a fire sensing signal holding circuit block 503H through an OR circuit, and at the same time, fire outbreak area information is reported to a fire control center by a GPS (global positioning system) transmitting and receiving unit 51OG via an antenna 51 IA. [73] Third, a signal is transmitted to the water feeding pump driving section 100 to operate the water feeding pump 104. [74] Fourth, a signal is transmitted to close the solenoid type air vent valve 204 which is installed on the upper part of the pressure-resistant water tank 200. [75] If the water feeding pump 104 is operated and the air vent valve 204 is closed, the pressure in the pressure-resistant water tank 200 naturally increases. [76] Then, a signal generated by the pressure switch 203 is first transmitted through an input signal processing block 507P (see FlG. 2) to AND circuits which are positioned at the input sides of the powder detonation determining circuit blocks 505X and 506X and then second transmitted to an AND circuit which is positioned at the input side of a time delay circuit block 504T. [77] Here, a predetermined time is required before the water feeding pump 104 normally operates and the pressure in the pressure-resistant water tank 200 increases to a pre¬ determined value. In this regard, the time delay circuit block 504T serves to prevent the powder detonating devices 205 and 206 from operating before the predetermined time has lapsed and thereby losing their functionality. [78] If the lower water level switch 202 is turned on due to a shortage of water in the pressure-resistant water tank 200, sprinkling cannot be implemented even when the powder detonating devices 205 and 206 are operated. Therefore, under this situation, in order to prevent unnecessary operation of the powder detonating devices 205 and 206, a NAND logic circuit 513 serves to prevent powder detonating signals from being transmitted to the powder detonation determining circuit blocks 505X and 506X. [79] In order to ensure that the powder detonating devices 205 and 206 are operated only when signals indicating sufficient fire extinguishing water and the necessity of further sprinkling pressure are received from the lower water level switch 202 and the pressure switch 203, the powder detonating devices 205 and 206 are allowed to detonate only when signals are transmitted through the NAND logic circuit 513 and subsequent individual AND circuits. [80] As described above, the GPS transmitting and receiving unit 510G functions to report the fire outbreak area information to the fire control center through wireless communication. In addition, the GPS transmitting and receiving unit 510G can se¬ lectively receive a signal through wireless communication from the fire control center instead of the local sprinkling system including the sprinkler solenoid valve 302, the local sprinkler 303 and the local fire heat sensor 304, such that the local sprinkling operation and the water feeding system can be separately controlled as if manually ma¬ nipulated by another independent control circuit block 500. [81] The reference numeral 508X designates a reserved circuit block of the powder detonation determining circuit blocks which is reserved for possible future expansion of the system, and the reference numeral 509R designates a reserved reset recognition circuit block which is reserved for possible future expansion of the system. [82] The water discharge valve 208 serves as an emergency injection device which is connected to an injection device. Therefore, with the water discharge valve 208 opened, by pressing an emergency push button 515 (see FlG. 2), all other conditions are disregarded, and the powder detonation determining circuit blocks 505X and 506X are operated through an emergency detonation control circuit block 516E to provide an emergency moving means for moving a ship in distress. [83] FlG. 3 is a detailed view illustrating the local fire heat sensor 304 shown in FlG. 1. The local fire heat sensor 304 comprises bimetal contact electrodes 601, a support base 606 and a cover 608 for supporting and fixing a sheathed powder train 603, and a perforated metal pipe 604 in which the sheathed powder train 603 is received. [84] It is preferred that the support base 606 be formed of a solid material such as a metal plate. [85] The cover 608 protects the bimetal contact electrodes 601 from losing their func¬ tionality or mis-operating due to rain water or sprinkling. [86] Cover support columns 607 are installed and locked by bolts 610 between the cover 608 and the support base 606 to connect them to each other with an adequate space defined between them. [87] The support base 606 and the cover support columns 607 are defined with threaded holes 609 for locking the bolts 601. [88] In order to reliably ensure watertightness, sidewalls may be further formed in the local fire heat sensor 304. [89] The bimetal contact electrodes 601 come into contact with each other to allow current flow when the surrounding temperature rises. [90] The cover 608 is defined with air vent holes 611. If moisture adheres to the bimetal contact electrodes 601 due to the climate, corrosion may result. In this regard, the air vent holes 611 allow the bimetal contact electrodes 601 to dry, and ventilate the inside space of the local fire heat sensor 304. [91] The reference numeral 602 designates electric connection terminals which are connected to a logic circuit connection part of the local fire heat sensor 304 in FlG. 2. [92] The sheathed powder train 603 functions to reliably transmit fire heat from the cor¬ responding fire outbreak location directly to the bimetal contact electrodes 601. [93] The sheathed powder train 603 is made by mixing durable fibrous substance and powder so that the sheathed powder train 603 does not lose its functionality even when it is wetted by rain water. The sheathed powder train 603 is received and enclosed in the perforated metal pipe 604 to be protected from wild animals and humans. [94] The perforated metal pipe 604 is defined with a plurality of large-sized perforations so that the sheathed powder train 603 can easily get transferred fire heat from the fire outbreak location. [95] Retainer pins 605 are firmly secured to the outer surface of the perforated metal pipe 604 so that the retainer pins 605 can be driven or embedded into the ground to prevent the perforated metal pipe 604 from slipping or rolling on inclined topography. [96] In this regard, it is to be readily understood that several perforated metal pipes 604 can be arranged to be connected with one another depending upon the topography or on the required length of the sheathed powder train 603. [97] Hereafter, the operation of the unmanned powder-type automatic fire extinguishing and emergency injection apparatus according to this embodiment of the present invention will be described. [98] In the apparatus, the water feeding pump driving section 100, in which the high pressure water feeding pump 104 is operated by the motor 102 or the internal combustion engine 103 in response to the signal from the local fire heat sensor 304, the pressure-resistant water tank 200, the regional sprinkler piping section 301, which connects the pressure-resistant water tank 200 and the local sprinklers 303 with each other, the local fire heat sensors 304, the control circuit block 500, and the GPS wireless transmitting and receiving unit 510G for reporting the fire outbreak area in¬ formation are operationally interconnected with one another. In the present apparatus, as the local sprinkler 303 selectively operates on the fire outbreak area, sprinkling and fire extinguishing efficiency is maximized. If the high pressure water feeding pump 104 cannot properly operate due to a power failure or the exhaustion of engine fuel when the fire has broken out, the powder detonating devices 205 and 206 are se¬ quentially operated as final measures for feeding fire extinguishing water. Thus, as the powder detonating devices 205 and 206 continuously generate pressure in the pressure- resistant water tank 200 in place of the high pressure water feeding pump 104, compressed fire extinguishing water can be reliably sprinkled. Also, due to the fact that fire outbreak information is immediately reported at an initial stage of the fire outbreak, fire fighting work can be rapidly commenced. [99] Hereinbelow, the construction and the operation of the present invention will be described with reference to the attached drawings. [100] If a fire breaks out, as the nearest local fire heat sensor 304 operates, a signal (an ON signal) generated by the nearest local fire heat sensor 304 opens the corresponding sprinkler solenoid valve 302, which is normally closed, as a result of which the fire ex¬ tinguishing solution filled in the regional sprinkler piping section 301 is sprinkled through the local sprinkler 303. Also, as the same signal reaches the fire sensing signal holding circuit block 503H, information about the fire outbreak location and the current state of the fire is immediately reported to the fire control center through the GPS transmitting and receiving circuit block 510G and the antenna 51 IA for transmitting and receiving control signals. [101] The same signal outputted from the fire sensing signal holding circuit block 503H is transmitted through the OR circuit to the water feeding pump driving section 100 for driving the high pressure water feeding pump 104 so that the motor 102 or the internal combustion engine 103 can be selectively operated, depending upon the situation, to allow the high pressure water feeding pump 104 to be operated. Further, the same signal closes the air vent valve 204 to allow an increase in the pressure in the pressure- resistant water tank 200. [102] As fire extinguishing water flows into the pressure-resistant water tank 200 through continuous operation of the high pressure water feeding pump 104, the pressure in the pressure-resistant water tank 200 rises, and fire extinguishing water is sprinkled through the selectively opened sprinkler solenoid valve 302 and the corresponding local sprinkler 303. [103] If the fire is extinguished through continuous sprinkling of the fire extinguishing water on the fire outbreak area, the local fire heat sensor 304 cools down and returns to its original state. A reset signal (an OFF signal) closes the sprinkler solenoid valve 302, by which sprinkling of the fire extinguishing water on the fire outbreak area is in¬ terrupted. [104] As the fire is completely extinguished, if there is no opened sprinkler solenoid valve 302, the solenoid type air vent valve 204 shown in FIG. 2 which was closed during fire fighting is opened, and the pressure in the pressure-resistant water tank 200 is relieved out to the atmosphere. If the upper water level switch 209 senses the maximum water level, an OFF signal is generated and transmitted to the water feeding pump driving section 100 through the OR circuit to interrupt the operation of the water feeding pump driving section 100. [105] At this time, the consumed materials, such as the sheathed powder train of the local fire heat sensor 304, must be replaced with new ones for subsequent operation (for preparing for another possible fire) as soon as the situation comes to an end. [106] If the atmospheric temperatures falls below zero Celsius in the wintertime, in order to prevent freezing of the regional sprinkler piping section 301 (comprising the pressure-resistant water feeding pipe), the atmospheric temperature sensor 502 transmits a heating signal to the insulated-type heating cable 306. [107] After receiving the information through wireless communication, the fire control center transmits a passive instruction code which performs the same function as the local fire heat sensor 304, from a control room or a helicopter through the GPS transmitting and receiving unit 510G. Thereupon, in order to prevent the fire from spreading, depending upon a state of the fire outbreak area which is confirmed with the naked eyes, neighboring solenoid valves 302 can be additionally selected to be opened and closed (by an output signal from the GPS transmitting and receiving unit 510G)(the corresponding portion is indicated by the dashed line). [108] In order to control the unmanned automatic fire extinguishing operation, the control circuit block 500 and surrounding logic circuits around the control circuit block 500 can be constructed from digital circuits using semiconductors, corresponding to the logic flow shown in FlG. 2, from a relay type sequence control circuit, or from a combination thereof. [109] If the water feeding pump driving section 100 does not operate due to the in¬ terruption of the energy supply (a power failure) or the exhaustion of engine fuel, even though the local fire heat sensor 304 operates, and consequently the pressure in the pressure-resistant water tank 200 does not increase, the time delay circuit block 504T delays the time by a preset transition period upon receipt of a signal transmitted from the pressure switch 203 through the pressure sensing circuit block 507P. Then, the powder detonation determining circuit block 505X generates a signal to sequentially operate the powder detonating devices 205 and 206, by which the fire extinguishing water accommodated in the pressure-resistant water tank 200 is pushed by the resultant pressure toward the nozzle of the sprinkler to conduct a sprinkling task. [110] The fire heat sensing step by the local fire heat sensor 304 which is first described in association with the fire extinguishing procedure will be described below. [Ill] When a fire has broken out, if the fire heat is not transferred to the bimetal contact electrodes 601, the fire extinguishing work cannot start and the fire will gradually spread. In this regard, due to the presence of the sheathed powder train 603 which is distributed over a relatively wide area within a predetermined range, the fire heat can be rapidly transferred to the bimetal contact electrodes 601 to operate the bimetal contact electrodes 601, whereby the control circuits and the fire control center can reliably recognize the fire outbreak information. The length and location of the sheathed powder train 603 may be determined as a tree type or a loop type depending upon the topography and surroundings of the fire outbreak area. [112] If the fire is sufficiently extinguished through sprinkling, as the surroundings of the bimetal contact electrodes 601 are cooled by the water falling on the cover 608 or by cool air flow, the bimetal contact electrodes are returned to their original positions. Thereupon, as a reset signal closes the sprinkler solenoid valve 302, sprinkling of the fire extinguishing water on the fire outbreak area is stopped. As the reset signal reaches the control circuit block 500 including the fire sensing signal holding circuit block 503H as shown in FlG. 2, all component elements are returned to their original and normal states. If the sheathed powder train 603 has been consumed and the powder detonating devices 205 and 206 have operated, they must be replaced with new ones after the situation is resolved to prepare for a possible subsequent fire. [113] Finally, in the case that an accident occurs in a ship, the emergency push button 515 and the emergency detonation control circuit block 516E are connected to the subsequent logic circuits, and water injection is effected through the water discharge valve 208 by the powder detonating devices 205 and 206. By this fact, the powder-type unmanned automatic fire extinguishing and emergency injection apparatus according to the present invention can help a ship in distress move to a desired place. [114] Industrial Applicability [115] As apparent from the above description, the powder-type unmanned automatic fire extinguishing and emergency injection apparatus according to the present invention provides the following advantages when a fire breaks out at a remote place where fire monitoring personnel or a fire fighting team cannot be stationed. First, the place and time of a fire outbreak can be sensed as precisely and quickly as possible. Second, because the outbreak of a fire can be instantaneously reported to a fire control center through a wireless communication network, it is possible to shorten the time that passes before proper fire fighting work can be conducted. Third, fire extinguishing efficiency can be improved by selectively sprinkling a fire extinguishing material at the location of the outbreak using a minimum number of supplying devices. Fourth, it is possible to secure a final emergency fire extinguishing means capable of sprinkling the fire extinguishing material (water or a fire extinguishing solution) even in forests having no supply of electric energy or in an emergency situation where energy cannot be supplied due to a power failure, etc. Fifth, an emergency injection device can be provided for helping or rescuing a ship in distress. [116] Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. [117]