Yoo, In-koo (105-805, Samsung apt. 817 Majang-dong, Seongdong-ku 133-050 Seoul, KR)
| 1. | An adapter for installing a pressure gauge, which comprises: (a) a connection hole 20 with a packing 23, which is connected to the pressure gauge 10; (b) a connection section 30 with said connection hole 20 via a hole 21, the inside of which has a hollow 31 connected to a pressure pipe 70, and the outside of which is inserted into the pressure pipe 70 for connection; (c) a projection 41 at the upper end of a disc 40, which moves by sliding along the hole 21; a groove fluid inflow 42 for passage at the upper end of said projection; and a disc 40, having a packing 43 at the lower side of said projection for opening and shutting the hole 21, which moves by sliding within said hollow 31 ; and (d) a controller for flow velocity 50, which has a hole for controlling flow velocity 51, supporting elastic bodies 60, along the lower side of said disc 40, which are installed amid the disc 40. |
| 2. | The adapter for installing a pressure gauge according to Claim 1, comprising said hole for controlling flow velocity 51, the inlet and outlet part of which has a filter chamber 52. |
| 3. | The adapter for installing a pressure gauge according to Claim 2, comprising said hole for controlling flow velocity 51, the size of which is 0.2mm0 or less. |
| 4. | The adapter for installing a pressure gauge according to Claim 3, comprising said hole for controlling flow velocity 51, the inlet and outlet part of which has a filter 54 for filtering fluid. |
BACKGROUND ART As for the method of installing a pressure gauge connected to a pressure pipe, which measures pressure, a method is generally used, whereby an intermediate valve is installed onto the pressure pipe and then a pressure gauge is directly installed onto the intermediate valve. Alternatively, a method may be used, whereby a simple adapter for installing a pressure gauge is installed to the intermediate valve, followed by installation of a pressure gauge thereto.
Why an intermediate valve must be placed as a connector between the pipe and the gauge is to stop the flow of fluid into the pressure gauge either when the gauge is to be momentarily removed for disorder or repair or when the gauge leaks. But for an intermediate valve, all operation of a pipeline is forced to stop to prevent leakage if a pressure gauge is to go out of order, and removed for repair.
Moreover, with respect to the conventional method of installing a pressure gauge to the pressure pipe, for increasing connection efficiency during the piping work, an intermediate valve with a tapering screw thread is fitted onto the branching part of a pressure pipe with a tapering screw thread, and then a pressure gauge is connected to the end of the intermediate valve.
However, an intermediate valve is generally used for connection of one pressure pipe to another, and this way the connection part of such a valve formed with a tapering screw thread poses difficulty in connecting with a pressure gauge ordinarily with a plane screw
thread; and even if a tape is rolled over the screw thread of a pressure gauge in an effort to prevent leak, the thread in actual engagement will not be enough fully to stop leaking to ensure the safety of the plant.
The conventional pressure gauge has its needle heavily shaking at quick violent pressure changes due to turbulent processes of a plant; rendering difficult for pressure gauge reading. As a means of overcoming such problems, an oil-filled pressure gauge is used where oil is instilled in the dial board to keep the needle, affected with resistance from the oil, from getting deformed or damaged at a sudden change of pressure. Use of such pressure gauges would raise production costs, and add to expenses for repair and maintenance.
Also, conventional pressure gauges have a problem of the Bourdon tube, the sensor of pressure, getting damaged from of contact with high-temperature steam when flowing through the gauge. To prevent this problem a siphon tube or chamber for condensate water is used; the use of the siphon or the chamber however is not appealing in terms of the appearance of a facility nor the rising production cost.
DISCLOSURE OF INVENTION The targets which the present invention is aimed to solve, are such problems as listed above for providing an adapter, which automatically shuts off the pipe to stop leaking when taken off the pressure gauge for repair or for other reasons. It is designed to enhances connectivity wherein the passage can be automatically opened after the complete connection of a pressure gauge to the adapter; Thus protecting the needle of a gauge subject to sudden changes of pressure; and defends the gauge from steam damage.
To attain there functions, the adapter of the present invention comprises: (a) a connection hole with a packing connected to a pressure gauge; (b) a connection section with said connection hole via a pipe-the inside of which has a hollow connected to a pressure pipe-and the outside of which is inserted into a
pressure pipe for connection; (c) a projection at the upper end of a disc, which moves by sliding along the pipe; a fluid inlet in the form of a groove at the upper end of said projection; and a disc, having a packing at the lower side of said projection for opening and shutting the pipe, which thereby moves by sliding within said hollow; and (d) a hole for controlling flow velocity, which forms a passage, tightly fitted tightly in the hollow of the lower end of said disc; a controller of flow velocity, supporting springs which work elastically between said disc; and a filter at the inlet/outlet of said controller for filtering fluid.
BRIEF DESCRIPTION OF DRAWINGS Fig. 1 is a sectional view of the adapter of the present invention.
Fig. 2 is an illustration of the adapter to show its action when a pressure gauge is connected with it.
Fig. 3 is a sectional view of the adapter as fitted with a diaphragm.
Fig. 4 is an illustration of the adapter to show its action when fitted with a diaphragm.
BEST MODE FOR CARRYING OUT THE INVENTION Below, the present invention will be further described in detail ; making reference to the drawings.
Fig. 1 is the sectional view of an adapter of the present invention, separate from a pressure gauge, and Fig. 2 is that of one connected with a gauge.
The adapter (A) of the present invention has a connection hole 20 in its upper part, and said connection hole 20 has a screw thread 22 formed on its inner circumferential surface to accept a pressure gauge 10 to be connected airtight by a screw. It also has a packing
23 on its bottom surface to accept the gauge 10 and keep it airtight.
In the center of the bottom surface of said connection hole 20 a hole 21 is formed; a hollow 31 is formed and connected with said hole 21, and said hollow 31 is connected through with a pressure pipe 70, as the adapter is inserted in said pressure pipe 70 for connection. On the outer side of the connection section 30 forming said hollow 31 a tapering screw thread 32 is formed to meet, for screw connection, a tapering screw thread 71 formed on said pressure pipe 70.
The hollow 31 connected a disc 40, which slides upward and downward, has a projection 41 in the upper end for connection with, by insertion in, the hole 21, and has another projection 44 below for insertion in spring 60.
In the projection 41, formed in said disc 40, a groove for fluid inflow 42 is formed at the upper surface.
In the hollow 31 below said disc 40 is a controller for flow velocity 50 fitted, which closes said hollow 31 airtight and has the hole for controlling flow velocity 51 which connects said hollow 31 and said pipe 70.
At the inlet/outlet of said hole for controlling flow velocity 51, there is a filter chamber 52, and a filter 54 abutting thereon, it is inserted firmly in said filter chamber 52. In the upper surface of said controller for flow velocity 50 is formed a concave part 53, where the lower end of spring 60 inserted in the lower projection 44 of said disc 40 is inserted.
Now the functions of the present invention are described below: When a pressure gauge is installed, using the adapter (A) of the present invention, and the connection section 30 in the body is connected by a screw with the pressure pipe 70, the fluid in the pipe 70 flows into the hollow 31 through the hole for controlling flow velocity 51 formed in the controller for flow velocity 50.
At this time, since a pressure gauge is not installed therein, the springs 60 set up between the disc 40 in the hollow 31, and the controller for flow velocity 50 push the disc 40 upward with their force of recovery, whereupon the packing 43 of said disc 40 comes into contact with the upper surface of the hollow 31, closing the hole 21, thus preventing fluid leakage.
The form of the filter chamber 52 of the inlet/outlet of the hole for controlling flow velocity 51 helps enlarge the contact surface of the fluid which passes through the filter 54, thus raising the efficiency in removal of foreign substances which may be contained in the fluid in passage, and also preventing the hole controlling flow velocity 51 from getting blocked up.
When a pressure gauge is screwed onto the adapter (A), the pressure gauge coming into contact with the packing 23 gets airtight, and the projection at the fluid inlet 11 on the lower part of the pressure gauge now presses the projection 41 formed in the disc 40. As the projection 41 is pressed down, the disc 40 formed as a unitary structure with the projection 41 moves down towards the lower part of the hollow 31 effectively compressing the spring 60.
With the downward movement of the disc 40, the contact between the packing 43 and the hollow 31 is broken, and simultaneously the fluid flows through the inner wall of the hollow 31 and the outer wall of the disc 40, and then flows, along the groove for fluid inlet at the upper part of the projection of said disc; into the fluid inlet 11 formed in the pressure gauge to have its pressure measured.
Accordingly, when the pressure gauge is removed due to disorder, repair, etc., its removal alone can secure prevention of fluid leakage, allowing an uninterrupted continuation of the operation of a pipeline.
When, the pressure of fluid suddenly and sharply changes, the shock from the change will be eased as while the material passes through the hole controlling flow velocity 51.
The impact upon the pressure gauge is lessened, its quake or damage mitigated.
The size and length of the hole for controlling flow velocity 51 is to be an important factor in prevention of any shock resulting from abrupt changes of the fluid pressure; its size is preferably 0.2mm0 or less.
Moreover, even when the fluid is high temperature steam, the steam slowly flows in via the hole for controlling flow velocity 51, which is cooled and condensed therein. The condensed water cooling therein stays in the hollow 31. When the pressure is lowered, only a certain amount of condensed water flows out to the pressure pipe via the hole for controlling flow velocity. There, due to the surface tension thereof, the condensed water on its own weight without discharge pressure cannot pass through the small hole for controlling flow velocity. Consequently, it stays in the hollow in a cooled state. When the pressure of steam increases, even if the steam has flowed in through the controller for flow velocity, the steam is condensed and cooled by the cooler condensed water remaining in the hollow. Hence, there is no damage to the pressure gauge, leading to convenient use.
The present invention renders easy and safe the connection of a pressure gauge with a pressure pipe, whereby preventing fluid from leaking, and makes it possible to buffer the violent impact of a possible abrupt change of pressures, whereby allowing accurate measurement and management of pressure and protecting the gauge from damage even during possible violent changes in pressure. Moreover, even in case of steam, the pressure gauge is protected from high-temperature steam without using supplementary apparatus, such as a siphon tube. No separate intermediate valve is required for connection of the gauge, and so fluid leak can be automatically prevented without separate manipulation at the time of replacement of the gauge, resulting in fast replacement or maintenance work. When there is damage to the pressure gauge of the pressure system due to an accident, without a operator on the scene, this may lead to an outflow of fluid from the inside. However, since the hole in the controller of flow velocity is small, the amount of outflow is very small as well. Even if the fluid is of inflammable gas, there is no concern for fire, explosion, etc. Even if there is an ignition, the flame is very small,
and extinguishing is made very easy. In case of poisonous gas, the amount of leakage per unit of time is extremely small, and thus there is little cause for danger due to a rise in concentration. All in all, from these factors, the present invention makes a substantial contribution from the viewpoint of safety management.
In summary of the effects of the present invention, it provides reduction in material and construction costs since the present invention does not require installation of an intermediate valve. Since it does not require manipulation of opening and closing, the present invention provides simple handling without concerns for malfunctions. Since it does not need supplementary apparatus such as a siphon tube, the present invention provides reduction in cost, with an improvement in external appearance. By way of long- term maintenance of accurate performance of a pressure gauge, the present invention also enables precise process management, with reduction in maintenance and management expenses (including personnel expenses, and expenses of acquiring replacement pressure gauges). Due to its extremely small amount of outflow, the present invention can prevent accidents at the time of malfunction.