CN215175139U

CN215175139U - Rotary fire grate

Info

Publication number: CN215175139U
Application number: CN202121230910.0U
Authority: CN
Inventors: 王明山; 王明坤
Original assignee: QINGDAO HUATAI BOILER THERMOELECTRIC DEVICES CO Ltd
Current assignee: QINGDAO HUATAI BOILER THERMOELECTRIC DEVICES CO Ltd
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-12-14
Anticipated expiration: 2031-06-03

Abstract

The utility model discloses a rotary grate relates to burning stove technical field, including combustion chamber shell and base frame, the installation of combustion chamber shell is fixed on base frame's upper end week side position, the junction front side of combustion chamber shell and base frame is provided with and links firmly the shell. The utility model discloses the combustion chamber shell is because of base frame's outside shape, be convenient for stably place the use like this, hood backup pad and inboard hood because of grate shell upper end, make the homodisperse material of being convenient for burn when rotating, and the wind-force suspension of dust through inboard hood is in hood backup pad top, the lime-ash flows to the grate shell centre of a circle through the air current like this, be convenient for evenly discharge through grate shell lower extreme ash pipe, make can not cause the jam when using, because of the inboard shape of bottom seal shell and rotatory bottom shell, make sealed inseparabler, effectively avoid overflowing of the inboard position of grate shell like this, thereby play fine guard action.

Description

Rotary fire grate

Technical Field

The utility model relates to a burning furnace technical field especially relates to a rotary grate.

Background

The grate is a part of a boiler or an industrial furnace where solid fuel is piled up and efficiently burned. The whole fire grate mainly comprises a frame and a fire grate segment. The grate segments are usually made of cast iron, the necessary ventilation gaps are kept between the assembled segments, and a separated ventilation chamber capable of adjusting air volume is arranged below the grate, so that air enters a fuel layer through the gaps and is burnt out, and ash is discharged manually or mechanically.

At present, when the existing rotary grate is used, because the bottom sealing is not tight, the generated gap enables the substances on the inner side to easily overflow, and the overflow easily influences the use of external personnel.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, and the rotatory grate that proposes, hood backup pad and the inboard hood because of the grate shell upper end, make the homodisperse material of being convenient for burn when rotating, and the wind-force suspension of dust through inboard hood is in hood backup pad top, the lime-ash flows to the grate shell centre of a circle through the air current like this, be convenient for evenly discharge through grate shell lower extreme ash pipe that falls like this, make can not cause the jam when using, and when discharging the use, because of the inboard shape of bottom seal shell and rotatory bottom shell, make sealed inseparabler, effectively avoid overflowing of the inboard position of grate shell like this, thereby play fine guard action.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a rotary grate, includes combustion chamber shell and base frame, the installation of combustion chamber shell is fixed on base frame's upper end week side position, the junction front side of combustion chamber shell and base frame is provided with and links firmly the shell, the junction left side of combustion chamber shell and base frame is provided with into husky interface pipe, be provided with the feeding storehouse in the middle of the rear end of combustion chamber shell, the inside grate shell that is provided with of junction of combustion chamber shell and base frame, be provided with the ash falling pipe in the middle of the lower extreme of grate shell, the junction of ash falling pipe and base frame is provided with movable friction plate, the week side of ash falling pipe is provided with rotatory bottom shell on the base frame, the lower extreme of rotatory bottom shell is located ash falling pipe week side and is provided with the bottom seal shell, lower extreme week side of grate shell is provided with driven gear, driven gear's the outside is located and is provided with rotary driver on the base frame, the upper end of the grate shell is provided with an air cap supporting plate, the upper end of the air cap supporting plate is provided with an inner side air cap, and the outer side of the air cap supporting plate is located on the rotary bottom shell and is provided with a vertical plate.

Through the technical scheme: the combustion chamber shell is because of base frame's outside shape, be convenient for stably place the use like this, hood backup pad and inboard hood because of the grate shell upper end, make the homodisperse material of being convenient for burn when rotating, and the wind-force suspension of dust through inboard hood is in hood backup pad top, the lime-ash flows to the grate shell centre of a circle through the air current like this, evenly discharge through grate shell lower extreme ash falling pipe is convenient for like this, make can not cause the jam when using, and when discharging the use, because of the inboard shape of bottom seal shell and rotatory bottom shell, make sealed inseparabler, effectively avoid overflowing of the inboard position of grate shell like this, thereby play fine guard action.

The utility model discloses further set up to, add to link firmly the shell and include supporting connection board, support total board and reinforcement circular shell, be provided with reinforcement circular shell in the middle of the upper end of supporting total board, be provided with the supporting connection board in the middle of the junction outside of supporting total board and reinforcement circular shell, support total board and connect on base frame and combustion chamber shell.

Through the technical scheme: because of the fixed connection of the additional fixed connection shell, the device plays a good role in limiting and fixing, and is firmer and more stable when being fixed.

The utility model discloses further set up to, rotary actuator includes driving motor, reducing gear box and driving gear, driving motor's front end is provided with the reducing gear box, the front end of reducing gear box is provided with the driving gear, driving motor connects on base frame, driving gear meshing connects on driven gear.

Through the technical scheme: because of the drive rotation use of rotary actuator for driven gear is more stable when rotating.

The utility model discloses further set up to, bottom seal shell includes interior oil blanket, closing plate, fastening connecting plate, gyration backup pad, bearing support plate, outer oil blanket, ash baffle and flange, flange's lower extreme is provided with the ash baffle, the lower extreme of ash baffle is provided with interior oil blanket, the week side of interior oil blanket is located the ash baffle and is provided with the gyration backup pad, the outside of gyration backup pad is located and is provided with outer oil blanket on the ash baffle, the lower extreme of outer oil blanket and gyration backup pad is provided with the bearing support plate, bearing support plate's lower extreme both sides are provided with the fastening connecting plate, the lower extreme of interior oil blanket is located the bearing support inboard and is provided with the closing plate, flange joint is on rotatory bottom shell, the fastening connecting plate is connected on base frame.

Through the technical scheme: because of the fixed sealing use of the bottom sealing shell, the overflow of the inner side position of the fire grate shell is effectively avoided, and a good protection effect is achieved.

The utility model discloses further set up to, rotatory bottom shell includes sand seal circle board, lower sand seal circle board, bottom circle board, rolls up the plectane, rolls up plectane and sealed ring plate down, the upper end of sealed ring plate is provided with down rolls up the plectane, the upper end of rolling up the plectane down is provided with bottom circle board, the outside of bottom circle board is located and is provided with down to roll up the plectane on rolling up the plectane, the upper end of bottom circle board is located and rolls up plectane top week side and be provided with down sand seal circle board, the inboard a week of sand seal circle board is provided with sand seal circle board down, it connects in the hood backup pad to go up sand seal circle board.

Through the technical scheme: because the rotating bottom shell is wrapped and sealed, the overflow of the inner side position of the grate shell is effectively avoided, and a good protection effect is achieved.

The utility model discloses further set up to, the outer end welded fastening of bottom seal shell is connected with the intake stack, just the bottom seal shell link up with the intake stack is inside.

Through the technical scheme: because of the outer end welding fixedly connected with air inlet pipe of bottom seal shell, be convenient for supply air because of the air inlet pipe outside the bottom seal shell like this, when supplying air, because of bottom seal shell and air inlet pipe are inside to link up moreover for can not take place to hinder when supplying air.

The utility model discloses further set up to, the hood backup pad passes through the mutual overlap joint shape of the degressive annular plate of polylith diameter, just hood backup pad and grate shell are in on the same centre of a circle.

Through the technical scheme: because of the mutual overlap joint shape of the degressive annular plate of polylith diameter of hood backup pad, when rotating like this to the homodisperse material of being convenient for burns and uses, and hood backup pad and grate shell are in on same centre of a circle moreover, make more convenient and more stable when the rotation.

The utility model discloses further set up to, ash falling pipe and grate shell pass through welded mode fixed connection, just the inside of ash falling pipe and grate shell link up.

Through the technical scheme: the ash falling pipe is fixedly connected with the grate shell in a welding mode, so that the ash falling pipe is not easy to fall off in use, and the ash falling pipe is communicated with the interior of the grate shell in ash discharge, so that the ash discharge is convenient to use.

The utility model has the advantages that:

1. through hood backup pad and the inboard hood of grate shell upper end, make the homodisperse material of being convenient for burn when rotating, and the wind-force suspension of dust through inboard hood is in hood backup pad top, lime-ash flows to the grate shell centre of a circle through the air current like this, be convenient for evenly discharge through grate shell lower extreme ash pipe like this, make can not cause the jam when using, and when discharging the use, because of the inboard shape of bottom seal shell and rotatory bottom shell, make sealed inseparabler, effectively avoid overflowing of the inboard position of grate shell like this, thereby play fine guard action.

2. Through being provided with bottom sealed shell structure, be convenient for sealed fixed like this, the support flange fixed connection of bottom sealed shell is on rotatory bottom shell, be convenient for connect fixed use like this, make difficult drop when using, and fastening connection board contradicts and connects on base frame, thereby be convenient for stable support and rotation use, when using, because of the dust board of outer oil seal board top week side, effectively block the dust like this and spill over, and the sealed parcel of outer oil seal board and interior oil seal board, thereby inseparabler firm in the time of the parcel, make wind-force be convenient for carry the transmission and use, and the gyration backup pad between outer oil seal board and the interior oil seal board, thereby effective rotation support uses, make the bearing backup pad cup joint more convenient stability when rotating.

3. Through being provided with rotatory bottom shell structure, effectively seal the use like this, the last sand seal board welded fastening of rotatory bottom shell is connected in the hood backup pad, be difficult for droing when using like this, when using, because of the sealed separation of last sand seal board and lower sand seal board, thereby avoid husky the spilling over, play fine guard action like this, bottom circle board is because of the last rolling circular plate and the rolling circular plate down in the lower extreme outside, effective parcel encloses the use like this, thereby be convenient for use, and the rolling circular plate is because of the sealed ring board of bottom side down, make effectively seal the parcel, thereby avoid spilling over of inside material, avoid causing interference and damage to outside personnel like this, thereby play guard action well.

Drawings

Fig. 1 is a schematic front plan view of a rotary grate according to the present invention;

fig. 2 is a schematic side plane structure view of a rotary grate according to the present invention;

fig. 3 is a schematic bottom plan view of a rotary grate according to the present invention;

fig. 4 is a schematic plan view of a top rotary portion of a rotary grate according to the present invention;

fig. 5 is a schematic sectional view of a bottom sealing shell of a rotary grate according to the present invention;

fig. 6 is a schematic cross-sectional view of a rotary bottom shell area of a rotary grate according to the present invention.

In the figure: 1. a dust falling pipe; 2. a movable friction plate; 3. a bottom sealing shell; 31. an inner oil seal plate; 32. a sealing plate; 33. fastening the connecting plate; 34. a rotating support plate; 35. a bearing support plate; 36. an outer oil seal plate; 37. a dust blocking plate; 38. a support flange; 4. rotating the bottom shell; 41. mounting a sand seal plate; 42. a sand seal plate is arranged; 43. a bottom ring plate; 44. winding up the circular plate; 45. rolling down the circular plate; 46. sealing the annular plate; 5. a combustion chamber housing; 6. adding a fixed connecting shell; 7. a base frame; 8. a feeding bin; 9. a sand inlet mouthpiece; 10. a drive motor; 11. an inner funnel cap; 12. a hood support plate; 13. a vertical plate; 14. a reduction gearbox; 15. a driving gear; 16. a driven gear; 17. a grate housing; 18. supporting the connecting plate; 19. a support header plate; 20. reinforcing the circular shell; 21. a rotary drive.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-6, a rotary grate comprises a combustion chamber shell 5 and a base frame 7, the combustion chamber shell 5 is fixed on the peripheral position of the upper end of the base frame 7, a fixedly connected joint shell 6 is arranged on the front side of the joint of the combustion chamber shell 5 and the base frame 7, a sand inlet interface tube 9 is arranged on the left side of the joint of the combustion chamber shell 5 and the base frame 7, a feeding bin 8 is arranged in the middle of the rear end of the combustion chamber shell 5, a grate shell 17 is arranged in the joint of the combustion chamber shell 5 and the base frame 7, an ash falling tube 1 is arranged in the middle of the lower end of the grate shell 17, a movable friction plate 2 is arranged at the joint of the ash falling tube 1 and the base frame 7, a rotary bottom shell 4 is arranged on the base frame 7 on the peripheral side of the ash falling tube 1, a bottom sealing shell 3 is arranged on the peripheral side of the rotary bottom shell 4 on the peripheral side of the ash falling tube 1, a driven gear 16 is arranged on the peripheral side of the grate shell 17, a rotary driver 21 is arranged on the base frame 7 at the outer side of the driven gear 16, an air cap supporting plate 12 is arranged at the upper end of the fire grate shell 17, an inner air cap 11 is arranged at the upper end of the air cap supporting plate 12, and a vertical plate 13 is arranged on the rotary bottom shell 4 at the outer side of the air cap supporting plate 12.

Specifically, consolidate and connect shell 6 and include supporting connection board 18, support total board 19 and reinforcement circular shell 20, be provided with reinforcement circular shell 20 in the middle of the upper end of support total board 19, be provided with supporting connection board 18 in the middle of the junction outside of support total board 19 and reinforcement circular shell 20, support total board 19 and connect on base frame 7 and combustion chamber shell 5, when using, the support total board 19 welded fastening of consolidating and connecting shell 6 connects on base frame 7 and combustion chamber shell 5, make difficult the coming off when using, it is more stable when supporting to consolidate circular shell 20 like this, and consolidate circular shell 20 when supporting, because of consolidating the middle supporting connection board 18 in the outside of circular shell 20, thereby play fine spacing fixed action, it is more firm stable when fixed like this.

It is specific, rotary actuator 21 includes driving motor 10, reducing gear box 14 and driving gear 15, driving motor 10's front end is provided with reducing gear box 14, reducing gear box 14's front end is provided with driving gear 15, driving motor 10 connects on base frame 7, driving gear 15 meshing is connected on driven gear 16, rotary actuator 21's driving motor 10 passes through screw fixed connection on base frame 7, the use of being convenient for installation and disassembly like this, and driving motor 10 is when rotating, because of the reducing gear box 14 of driving motor 10 front end, thereby be convenient for stably drive driving gear 15 and rotate, and driving gear 15 meshing is connected on driven gear 16, driving gear 15 drives driven gear 16 and more stable when rotating like this, thereby be convenient for drive and use.

Specifically, the bottom sealing shell 3 comprises an inner oil sealing plate 31, a sealing plate 32, a fastening connecting plate 33, a rotary supporting plate 34, a bearing supporting plate 35, an outer oil sealing plate 36, an ash baffle plate 37 and a supporting flange 38, wherein the lower end of the supporting flange 38 is provided with the ash baffle plate 37, the lower end of the ash baffle plate 37 is provided with the inner oil sealing plate 31, the peripheral side of the inner oil sealing plate 31 is provided with the rotary supporting plate 34 on the ash baffle plate 37, the outer side of the rotary supporting plate 34 is provided with the outer oil sealing plate 36 on the ash baffle plate 37, the lower ends of the outer oil sealing plate 36 and the rotary supporting plate 34 are provided with the bearing supporting plate 35, the two sides of the lower end of the bearing supporting plate 35 are provided with the fastening connecting plate 33, the lower end of the inner oil sealing plate 31 is provided with the sealing plate 32 on the inner side of the bearing supporting plate 35, the supporting flange 38 is connected to the rotary bottom shell 4, the fastening connecting plate 33 is connected to the base frame 7, the supporting flange 38 of the bottom sealing shell 3 is fixedly connected to the rotary bottom shell 4, be convenient for connect fixed the use like this, make difficult drop when using, and fastening connection board 33 is contradicted and is connected on base frame 7, thereby be convenient for stabilizing support and rotation use, when using, because of the ash blocking plate 37 of 36 top week sides on outer oil seal board, effectively block the dust like this and spill over, and the sealed parcel of outer oil seal board 36 and interior oil seal board 31, thereby inseparable firm in the time of the parcel, make wind-force be convenient for carry the transmission and use, and gyration backup pad 34 between outer oil seal board 36 and the interior oil seal board 31, thereby effective rotation support uses, make bearing support plate 35 cup joint more convenient stability when pivoted.

Specifically, the rotary bottom shell 4 comprises an upper sand-seal ring plate 41, a lower sand-seal ring plate 42, a bottom ring plate 43, an upper rolling circular plate 44, a lower rolling circular plate 45 and a sealing circular plate 46, the upper end of the sealing circular plate 46 is provided with the lower rolling circular plate 45, the upper end of the lower rolling circular plate 45 is provided with the bottom ring plate 43, the outer side of the bottom ring plate 43 is positioned on the lower rolling circular plate 45 and is provided with the upper rolling circular plate 44, the upper end of the bottom ring plate 43 is positioned on the upper circumferential side of the upper rolling circular plate 44 and is provided with the lower sand-seal ring plate 42, the inner circumference of the lower sand-seal ring plate 42 is provided with the upper sand-seal ring plate 41, the upper sand-seal ring plate 41 is connected to the hood support plate 12, the upper sand-seal ring plate 41 of the rotary bottom shell 4 is fixedly welded to the hood support plate 12, so that the rotary bottom shell is not easy to fall off during use, and the upper sand-seal ring plate 41 and the lower sand-seal ring plate 42 are separated so as to prevent sand from overflowing during use, thereby achieving a good protection effect, bottom collar plate 43 encloses the use of closing because of the last rolling circular plate 44 and the rolling circular plate 45 down of the lower extreme outside effectively like this to be convenient for use, and rolling circular plate 45 down because of the sealed ring plate 46 of bottom side makes effectively seal the parcel, thereby avoids overflowing of inside material, avoids causing interference and damage to outside personnel like this, thereby plays guard action well.

Specifically, the outer end welding fixedly connected with air inlet pipe of bottom seal shell 3, and bottom seal shell 3 link up with the air inlet pipe is inside, because of the outer end welding fixedly connected with air inlet pipe of bottom seal shell 3, be convenient for supply air because of the air inlet pipe in the 3 outsides of bottom seal shell like this, when supplying air, link up because of bottom seal shell 3 and air inlet pipe are inside moreover for can not take place to obstruct when supplying air.

Specifically, the hood backup pad 12 is through the mutual overlap joint shape of the degressive annular plate of polylith diameter, and hood backup pad 12 and grate shell 17 are in same centre of a circle, because of the mutual overlap joint shape of the degressive annular plate of polylith diameter of hood backup pad 12, when the pivoted like this to the homodisperse material of being convenient for burns and uses, and hood backup pad 12 and grate shell 17 are located same centre of a circle in addition, make more convenient and more stable when the pivoted.

Specifically, the ash falling pipe 1 is fixedly connected with the grate shell 17 in a welding mode, the ash falling pipe 1 is communicated with the interior of the grate shell 17, the ash falling pipe 1 is fixedly connected with the grate shell 17 in a welding mode, so that the ash falling pipe is not easy to fall off in use, and the ash falling pipe 1 is communicated with the interior of the grate shell 17 in ash discharge so as to facilitate ash discharge.

The working principle is as follows: the combustion chamber shell 5 is convenient for stably place the use because of the outside shape of base frame 7 like this, then connect the electric connection of rotary actuator 21 with external power source to be convenient for operation control uses, be convenient for drive driven gear 16 through rotary actuator 21 like this and rotate, and driven gear 16 rotates the back, thereby effectively drives grate shell 17 and uses.

When the grate is used in a burning mode, materials can be conveniently and uniformly dispersed to burn when the grate is rotated due to the hood supporting plate 12 and the inner side hood 11 which are arranged at the upper end of the grate shell 17, dust is suspended above the hood supporting plate 12 through wind power of the inner side hood 11, and therefore ash and slag flow to the circle center of the grate shell 17 through air flow, and the ash and slag pipe 1 arranged at the lower end of the grate shell 17 is convenient to uniformly discharge, so that the grate cannot be blocked when the grate is used.

When the bottom sealing shell 3 is used for discharge, the sealing is more compact because of the inner shape of the bottom sealing shell 3, the bottom sealing shell 3 is composed of an inner oil sealing plate 31, a sealing plate 32, a fastening connecting plate 33, a rotary supporting plate 34, a bearing supporting plate 35, an outer oil sealing plate 36, an ash baffle 37 and a supporting flange 38, the supporting flange 38 of the bottom sealing shell 3 is fixedly connected to the rotary bottom shell 4, so that the bottom sealing shell is convenient to connect and fix for use, and is not easy to fall off when in use, the fastening connecting plate 33 is connected to the base frame 7 in an abutting mode, so that the stable supporting and the rotary use are convenient, when in use, the ash baffle 37 on the peripheral side above the outer oil sealing plate 36 effectively prevents dust from overflowing, and the outer oil sealing plate 36 and the inner oil sealing plate 31 are wrapped in a sealing mode, so that the wind power is more compact and firm when the wrapping is achieved, the wind power transmission use is convenient, and the rotary supporting plate 34 between the outer oil sealing plate 36 and the inner oil sealing plate 31, thereby effectively rotate the support and use for convenient more stable when bearing support plate 35 cup joints the rotation.

The rotating bottom shell 4 is wrapped on the outer side of the fire grate shell 17, the rotating bottom shell 4 prevents the overflow of the substances inside the fire grate shell 17 due to the shape of the outer side, the rotating bottom shell 4 is composed of an upper sand sealing plate 41, a lower sand sealing plate 42, a bottom sealing plate 43, an upper rolling circular plate 44, a lower rolling circular plate 45 and a sealing circular plate 46, the upper sand sealing plate 41 of the rotating bottom shell 4 is fixedly connected to the hood support plate 12 in a welding manner, so that the rotating bottom shell is not easy to fall off in use, when in use, the bottom sealing plate 43 is effectively wrapped and used due to the upper rolling circular plate 44 and the lower rolling circular plate 45 on the outer side of the lower end, so that the rotating bottom shell is convenient to use, and the lower rolling circular plate 45 is effectively wrapped and sealed due to the sealing circular plate 46 on the bottom side, thereby avoiding the overflow of internal substances, avoiding causing interference and damage to external personnel, and playing a good role in protection.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a rotary grate, includes combustion chamber shell (5) and base frame (7), its characterized in that, the installation of combustion chamber shell (5) is fixed on upper end week side position of base frame (7), the junction front side of combustion chamber shell (5) and base frame (7) is provided with links firmly connects shell (6), the junction left side of combustion chamber shell (5) and base frame (7) is provided with into husky interface tube (9), be provided with feeding storehouse (8) in the middle of the rear end of combustion chamber shell (5), the junction inside of combustion chamber shell (5) and base frame (7) is provided with grate shell (17), be provided with ash falling pipe (1) in the middle of the lower extreme of grate shell (17), the junction of ash falling pipe (1) and base frame (7) is provided with movable friction plate (2), the week side of ash falling pipe (1) is located base frame (7) and is provided with rotatory bottom shell (4), the lower extreme of rotatory bottom shell (4) is located ash falling pipe (1) week and all sides are provided with bottom seal shell (3), the lower extreme week of grate shell (17) is provided with driven gear (16), the outside of driven gear (16) is located and is provided with rotary actuator (21) on base frame (7), the upper end of grate shell (17) is provided with hood backup pad (12), the upper end of hood backup pad (12) is provided with inboard hood (11), the outside of hood backup pad (12) is located and is provided with riser (13) on rotatory bottom shell (4).

2. The rotary grate according to claim 1, characterized in that the additional connecting casing (6) comprises a supporting connecting plate (18), a supporting general plate (19) and a reinforcing circular casing (20), the reinforcing circular casing (20) is arranged in the middle of the upper end of the supporting general plate (19), the supporting connecting plate (18) is arranged in the middle of the outer side of the joint of the supporting general plate (19) and the reinforcing circular casing (20), and the supporting general plate (19) is connected to the base frame (7) and the combustion chamber casing (5).

3. The rotary grate according to claim 1, wherein the rotary driver (21) comprises a driving motor (10), a reduction gearbox (14) and a driving gear (15), the reduction gearbox (14) is arranged at the front end of the driving motor (10), the driving gear (15) is arranged at the front end of the reduction gearbox (14), the driving motor (10) is connected to the base frame (7), and the driving gear (15) is connected to the driven gear (16) in a meshed manner.

4. The rotary grate according to claim 1, wherein the bottom seal casing (3) comprises an inner oil seal plate (31), a seal plate (32), a fastening connection plate (33), a rotary support plate (34), a bearing support plate (35), an outer oil seal plate (36), an ash baffle plate (37) and a support flange (38), the lower end of the support flange (38) is provided with the ash baffle plate (37), the lower end of the ash baffle plate (37) is provided with the inner oil seal plate (31), the rotary support plate (34) is arranged on the ash baffle plate (37) at the peripheral side of the inner oil seal plate (31), the outer oil seal plate (36) is arranged on the ash baffle plate (37) at the outer side of the rotary support plate (34), the bearing support plate (35) is arranged at the lower ends of the outer oil seal plate (36) and the rotary support plate (34), the fastening connection plates (33) are arranged at both sides of the lower end of the bearing support plate (35), the lower end of the inner oil seal plate (31) is located on the inner side of the bearing support plate (35) and is provided with a seal plate (32), the support flange (38) is connected to the rotary bottom shell (4), and the fastening connection plate (33) is connected to the base frame (7).

5. The rotary grate according to claim 1, wherein the rotary bottom shell (4) comprises an upper sand-seal ring plate (41), a lower sand-seal ring plate (42), a bottom ring plate (43), an upper rolling circular plate (44), a lower rolling circular plate (45) and a sealing circular plate (46), the upper end of the sealing circular plate (46) is provided with the lower rolling circular plate (45), the upper end of the lower rolling circular plate (45) is provided with the bottom ring plate (43), the outer side of the bottom ring plate (43) is positioned on the lower rolling circular plate (45) and is provided with the upper rolling circular plate (44), the upper end of the bottom ring plate (43) is positioned on the upper circumferential side of the upper rolling circular plate (44) and is provided with the lower sand-seal ring plate (42), the inner circumference of the lower sand-seal ring plate (42) is provided with the upper sand-seal ring plate (41), and the upper sand-seal ring plate (41) is connected to the hood support plate (12).

6. The rotary grate according to claim 1, wherein the outer end of the bottom sealed casing (3) is fixedly connected with an air inlet pipe by welding, and the bottom sealed casing (3) is communicated with the inside of the air inlet pipe.

7. A rotary grate according to claim 1, characterized in that the hood support plate (12) is shaped to overlap each other by a plurality of annular plates of decreasing diameter, and that the hood support plate (12) and the grate housing (17) are located on the same centre of circle.

8. The rotary grate according to claim 1, characterized in that the ash falling pipe (1) and the grate housing (17) are fixedly connected by welding, and the interior of the ash falling pipe (1) and the grate housing (17) is through.