By means of solid fuel automatic feeding system, fuel Is transported from fuel stoker to the combustion chamber of all kind of automatic feeding heat exchangers such as boiler, steam boiler, thetraoblook (hot air generator) those which utilise Sold materials (liquid or gas) as a heat convector. These systems invol ve electric and/or electronic control unit, electric motor, power transmission tools, and mechanical parts. Control unit: Electric motor or motors, and ail aspects of boiler (such as blower fan) are controlled by this thermic, electric and/or e!etromc units to control temperature of solid fuel automatic feeding boiler.

Electric motor, feel feeding motor : Moment supplier of power transmission tools which is utilised for transporting feel during feeding period , Power transmission tools: At least one of redactor, gear box, belt /, chain. cog-wheel, shaft, etc those which control an transfer moment supplie from electric motor. These tools transfer moment to mechanical parts,

.Mechanical parts: Flston(reeiprocating) or helix which relocates solid feel during feeding period. T ese parts could he designed with various geometries and made of various materials

System tools: Electric motor, control unit and power transmission tools. Stoker: Solid fuel container of boiler.

Automatic feeding system A eomplate ofmechanical parts an system tools.

In ordinary mode! solid fee! automatic feeding systems, piston or helix Is utilised as mechanical part which transfers solid feel from stoker to the combustion chamber of boiler. i In a type of ordinary model solid fuel automatic feeding system which involves only one helix as mechanical part, solid fuel could be under high pressure and broken by the movement of helix. Thus, solid fuel automatic feeding system which involves only one helix could be under mechanical stress during the operation. s Another type of ordinary model solid fuel automatic feeding system, there is only one piston as a mechanical part. The piston is locate at the bottom of the stoker. In front of the piston is a space that i full of solid fuel. Exit of the stoker Is a duct located horizontally where solid foe! reaches an then leave from, Piston slides towards to exit of foe stoker horizontally. Thus, solid fuel reaches to exit of the ID stoker then, It is directed to combustion chamber. I this type of solid foe! automatic feeding system, in front of the piston Is a stablled space that is not changeable. Therefore, in ail feeding periods, always same amount of fuel is transferred. It causes a feeding period that doesn't enable to feed different amount of fuel. It causes a limited and inflexible feeding operation.

is Furthermore* there could be small and big size of soli fuel in the stoker.

According to this. In front of the piston has to be a large enough space to contain big size of solid fuel. This large space collects large amount of small size of solid fuel in foe stoker. In conclusion, these conditions cause to transfer large amounts of small size solid foe! during all feeding periods. It results in a limited and 20 Inflexible feeding operation.

By the movement of piston, some of the solid fuel could be pressed and broken between the piston and the exit of the stoker. Some of the solid fuel could become smaller and this condition causes efficiency loss of burning. In a result, automatic feeding system becomes under stress, needs more powerful! and expensive electric 25 motor, This condition causes higher operation and production costs as well as shorter useful life of solid fuel automatic feeding system which Involves only one piston.

Them could be some hard impurities like piece of metal, stone, etc in the solid fuel. These Impurities could be pressed between piston and the exit of the stoker. As a result of this , al l automatic fee system and exit of the s toker could be of solid fuel automatic feeding system which involves only one piston.

This Invent was designed as an alternative to ordinary model solid fuel automatic s feeding systems, fopview and AA cross sectio view those which eference numbers in description. ^ ^x g g view of AA cross section view that in the drawing I angles

to container of boiler)

2: At least one «nit mechanical part (helix or piston) in the sedmg system

3: Exit of the stoker (I) (a gap located vertically where solid feel reaches and then lay feeding system as mechanical part.

15 space where sol readies trom exi oi stoker (3). system is a subunit of indirect-reciprocating feeding system, involves electric motor, control unit» power transmission tools and at least one unit mechanical «art f piston

20 feeding system. electric motor, unit, power transmission tools and at least one unit mechanical part (pIstonX4) located in lower levs ban primary feeding system's mechanical part (2) feeding system: A eomplate of primary feet g system and as secondary feeding system. Indifeet-redptoeaimg feeding system is a solid ft automatic feeding system

solid feel between them, Indirect-reciprocating feeding system involves two as primar an secondary feeding system least one unit mechanical part of primary feeding system (helix or piston)(2) ted at the bottom of stoke (I) transfers foe! to the exit of the stoker (3) that is a gap located vertically. Solid feel feds down from here (3) to fee in front of the piston (5), lire piston (4) of fee secondar feeding system slides horizontally towards to combustion chamber. Solid fuel reaches to combustion chamber. Thus indirect-reciprocating feeding system completes it's mission. Piston (4) comes i* oonaont&!ly, Then, feeding period starts again. fuel fell to in front of piston (5) cart be controlled ff the control unit of system, different amount of fuel can

indirect-re procating system provides a flexible feeding system which is suitable for boilers.

The exit of the stoker (3) Is located vertically at the boto of stoker (!). The solid fuel tails down to secondary feeding system without any pressure by mechanical part of primary feeding system (2). So, fuel reaches to combustion chamber without being broken, Indirect-reciprocal! ng system works properly and provides longlastfeg usage without getting damage.

Primary an secondary feeding systems can share the same unit of system tools which are electric motor, control unit and power transmission tools. Furthermore, these two feeding system cun involve different unit of system tools fro each other which are electric motor, control unit, and power transmission tools. Primary feeding system involves at least one unit mechanical part (helix or pistoo)(2) ig system Involves at least one uni! pisi as mechanical part. system doesn t involve an helix.

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