A boiler feed combustion device

Abstract

The application provides a boiler feed combustion device and belongs to the technical field of boilers, which solves the technical problem that fuel cannot be in full contact with the fuel plate. The boiler feed combustion device comprises a support frame, the top of the support frame is fixedly connected with a storage bin, the bottom of the storage bin is provided with a discharge port, the inside of the discharge port is slidably connected with a feeding plate, one side of the support frame is provided with an adjusting mechanism for adjusting the feeding plate, one side of the support frame is slidably connected with a feeding box, the inside of the discharge port is slidably connected with a second baffle, the surface of the side of the combustion box close to the storage bin is provided with an opening mechanism for opening the second baffle, a plurality of air rollers are rotationally connected in the combustion box, a plurality of air rods are fixedly connected to the surface of the plurality of air rollers, the plurality of air rods are evenly arranged in a ring shape, and one end of the plurality of air rollers is provided with a rotating mechanism for rotating the air roller. In the application, the combustion box is arranged, so that the fuel can be uniformly distributed in the inside of the combustion box.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of boilers, and relates to a boiler feeding device, in particular to a boiler feeding and burning device. BACKGROUND

[0002] According to the search, the patent with the Chinese patent authorization number CN214332779U discloses a boiler feeding and burning device, which belongs to the technical field of boilers and comprises a fuel boiler including an air bellow and a feeding bin. The air bellow is provided with a burning plate. A first feeding assembly is installed at one end of the feeding bin close to the air bellow. A second feeding assembly is installed at one end of the air bellow away from the burning plate. The first feeding assembly is connected with the second feeding assembly and is arranged in a high-low mode. The first feeding assembly is used for conveying the fuel in the feeding bin to the second feeding assembly. The second feeding assembly is used for conveying the fuel thereon to the burning plate. Since the first feeding assembly and the second feeding assembly are connected and arranged in a high-low mode, the fuel on the first feeding assembly and the fuel on the second feeding assembly are separated. Therefore, even if the fuel on the second feeding assembly is burned, the fuel on the first feeding assembly will not be burned. Thus, the occurrence of backfire is reduced.

[0003] The boiler feeding and burning device in the above patent is driven by the motor 421 to rotate the push rod 423, so that the roller 424 abuts against the other inner wall of the driving frame 422, thereby pushing the reset of the driving frame 422, and further driving the reset of the feeding plate 410. The fuel falls onto the burning plate 120 under the blockage of the blocking plate 330. Since the blocking plate 330 is arranged on one side of the burning plate 120, when it blocks the fuel, the fuel will fall to the side close to the blocking plate 330, so that the fuel cannot fully contact the fuel plate 120. Therefore, the problem needs to be solved. SUMMARY

[0004] The present application aims at the above-mentioned problems existing in the prior art, and provides a boiler feeding and burning device. The technical problem to be solved by the present application is that since the blocking plate is arranged on one side of the burning plate, when it blocks the fuel, the fuel will fall to the side close to the blocking plate, so that the fuel cannot fully contact the fuel plate.

[0005] The object of the present application can be achieved by the following technical solutions:

[0006] The utility model provides a kind of boiler feed combustion device, including support frame, the support frame top is fixedly connected with storage bin, the storage bin bottom is equipped with discharge gate, the discharge gate inside is slidably connected with feeding plate, the support frame one side is equipped with adjusting mechanism for adjusting feeding plate, the support frame one side is slidably connected with feeding box, the feeding box one side is equipped with moving mechanism for moving feeding box, the feeding box bottom is equipped with three first discharge gates, the first baffle is slidably connected with inside in the first discharge gate side of feeding box close to first discharge gate, the second discharge gate is equipped in the top of the first baffle side close to three first discharge gates, and the second discharge gate is cooperatively arranged with the first discharge gate, the support frame is symmetrically equipped with two constraint grooves inside in the side of storage bin close to, two the constraint column is slidably connected in the constraint groove, the same second connecting plate is fixedly connected between two constraint columns, the second connecting plate is fixedly connected on the side of first baffle, the first baffle is symmetrically equipped with two third limit grooves in the top of the side of feeding box close to, and the limiting mechanism for limiting first baffle is equipped in the third limit groove, the combustion box is fixedly connected with in the bottom of support frame far from storage bin, the combustion box one side is equipped with slag discharge gate, the slag discharge gate inside is slidably connected with second baffle, the opening mechanism for opening second baffle is equipped on the surface of the combustion box side close to storage bin, a plurality of wind rollers are rotatably connected in the combustion box, and a plurality of wind rods are fixedly connected on the surface of a plurality of wind rollers, a plurality of wind rods are evenly arranged in annular, and a plurality of wind rollers are equipped with rotating mechanism for rotating wind roller in one end.

[0007] The utility model mainly works as follows: the first discharge gate is equipped in the bottom of feeding box, and the first discharge gate is blocked by the first baffle initially, so that the feeding box can be normally transported, when the first baffle stops moving, the feeding box will continue to move, so that the first discharge gate in the bottom of the feeding box can cooperate with the second discharge gate in the top of the first baffle, when the first discharge gate cooperates with the second discharge gate, the fuel in the feeding box can be poured, because the feeding box is above the combustion box after moving, and the first discharge gate is separately arranged, so that the fuel can be evenly distributed in the combustion box, and a plurality of wind rollers are installed in the combustion box, so that the wind rollers can supply oxygen to the inside of the combustion box, so that the new fuel can be more fully burned.

[0008] The adjusting mechanism includes two second limit grooves, two The second limit groove is symmetrically equipped in the top of support frame, and the first limit rod, first screw rod are arranged in the second limit groove respectively, the first limit rod is fixedly connected in the second limit groove, the first screw rod is rotatably connected in the second limit groove, the feeding plate is sleeved on the surface of first limit rod, first screw rod, and the feeding plate is cooperatively arranged with the first screw rod, one end of the first screw rod is fixedly connected with first motor, and the first motor is fixedly connected on the side of support frame.

[0009] With the above structure, the feeding plate can drive the fuel in the storage bin to move.

[0010] The moving mechanism comprises two first limiting grooves, two second limiting rods and two second screws.

[0011] With the above structure, the feeding box can drive the fuel to move normally.

[0012] The limiting mechanism comprises a receiving groove, a support rod, a limiting block, a first spring, a third limiting groove and a third limiting rod.

[0013] With the above structure, the first baffle can be limited to ensure that it can move synchronously with the feeding box in the early stage.

[0014] The opening mechanism comprises a third connecting plate, two jacks, two support columns, two extension springs, a second baffle and a combustion box.

[0015] With the above structure, the combustion box side ash discharge port can be opened to achieve the purpose of ash discharge.

[0016] The rotating mechanism comprises a ratchet wheel fixedly connected to one side of the air roller, an adjusting arm fixedly connected to the surface of one side of the ratchet wheel, a plurality of pawls rotatably connected to the surface of one side of the adjusting arm and matched with the ratchet wheel, two second springs fixedly connected to the surface of one side of the pawls, and the top ends of the two second springs fixedly connected to the bottom of the adjusting arm, a flow guide disc rotatably connected to the other end of the air roller, and a flow guide plate fixedly connected to the other end of the flow guide disc and fixedly connected to one side of the combustion box.

[0017] With the above structure, the air roller can rotate, so that the fuel can be burned more fully.

[0018] Compared with the prior art, the boiler feeding and burning device has the following advantages:

[0019] 1. The first discharge port is arranged to ensure uniform distribution of the fuel. The constraint column is arranged on one side of the first baffle, and the constraint column slides in the constraint groove. Since the constraint groove is shorter than the second lead screw, when the first baffle is moved to a certain extent by the feeding box, the constraint groove will constrain the first baffle through the constraint column to stop moving. After the first baffle stops moving, the feeding box will continue to move, so that the first discharge port at the bottom of the feeding box can cooperate with the second discharge port at the top of the first baffle. After the first discharge port cooperates with the second discharge port, the fuel in the feeding box can be poured. Since the feeding box is above the combustion box and the first discharge port is arranged separately, the fuel can be uniformly distributed in the combustion box.

[0020] 2. The air roller is arranged to supply oxygen to the combustion box, so that the new fuel can be burned more fully. The ratchet wheel is arranged on one side of the air roller, and the pawls are matched with the surface of the ratchet wheel. Since the pawls and the ratchet wheel are arranged, when the pawls are reset by the third connecting plate, the pawls will rotate the ratchet wheel to drive the air roller to rotate synchronously. The air rod is arranged on the surface of the air roller. Since the air rod is protrudingly arranged, when the air roller drives the air rod to rotate, the fuel in the combustion box can be mixed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure diagram of the boiler feeding and burning device of the present application;

[0022] Figure 2 is the side view structure diagram of the boiler feeding and burning device of the present application;

[0023] Figure 3 is the internal structure diagram of the boiler feeding and burning device of the present application;

[0024] Figure 4 is a cross-sectional structure schematic view of a boiler feed combustion device in the present application;

[0025] Figure 5 is Figure 4 is an enlarged structure schematic view of A in

[0026] Figure 6 is a regulating mechanism schematic view of a boiler feed combustion device in the present application;

[0027] Figure 7 is a moving mechanism schematic view of a boiler feed combustion device in the present application;

[0028] Figure 8 is Figure 7 is an enlarged structure schematic view of B in

[0029] Figure 9 is an opening mechanism schematic view of a boiler feed combustion device in the present application;

[0030] Figure 10 Figure 9 is an enlarged structure schematic view of C in

[0031] In the figure: 1, storage silo; 2, feeding plate; 3, feeding box; 4, first baffle; 5, combustion box; 6, air roller; 7, support frame; 101, discharge port; 102, first limiting groove; 103, constraint groove; 104, second limiting groove; 201, first limiting rod; 202, first lead screw; 203, first motor; 301, first discharge port; 302, first connecting plate; 303, second lead screw; 304, second motor; 305, storage groove; 306, support rod; 307, limiting block; 308, first spring; 401, second connecting plate; 402, constraint column; 403, second discharge port; 404, third limiting groove; 501, deslagging port; 502, second baffle; 503, support column; 504, tension spring; 505, third connecting plate; 506, jacking column; 601, ratchet wheel; 602, regulating arm; 603, flow guide disc; 604, flow guide plate; 605, air rod; 606, pawl; 607, second spring. DETAILED DESCRIPTION

[0032] The following are specific embodiments of the present application and further describe the technical solutions of the present application in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0033] As Figure 1 - Figure 10As shown, a boiler feed combustion device, including a support frame 7, the top of the support frame 7 is fixedly connected with a storage bin 1, the bottom of the storage bin 1 is provided with a discharge port 101, the inside of the discharge port 101 is slidably connected with a feeding plate 2, one side of the support frame 7 is provided with an adjusting mechanism for adjusting the feeding plate 2, one side of the support frame 7 is slidably connected with a feeding box 3, one side of the feeding box 3 is provided with a moving mechanism for moving the feeding box 3, the bottom of the feeding box 3 is provided with three first discharge ports 301, the inside of the side of the feeding box 3 close to the first discharge port 301 is slidably connected with a first baffle 4, the top of the side of the first baffle 4 close to the three first discharge ports 301 is provided with a second discharge port 403, and the second discharge port 403 is arranged in cooperation with the first discharge port 301, the inside of the side of the support frame 7 close to the storage bin 1 is symmetrically provided with two constraint grooves 103, the inside of the two constraint grooves 103 is slidably connected with a constraint column 402, the same second connecting plate 401 is fixedly connected between the two constraint columns 402, the second connecting plate 401 is fixedly connected on one side of the first baffle 4, the top of the side of the first baffle 4 close to the feeding box 3 is symmetrically provided with two third limiting grooves 404, the inside of the two third limiting grooves 404 is provided with a limiting mechanism for limiting the first baffle 4, the bottom of the side of the support frame 7 away from the storage bin 1 is fixedly connected with a combustion box 5, one side of the combustion box 5 is provided with a slag discharge port 501, the inside of the slag discharge port 501 is slidably connected with a second baffle 502, the surface of the side of the combustion box 5 close to the storage bin 1 is provided with an opening mechanism for opening the second baffle 502, a plurality of air rollers 6 are rotatably connected in the combustion box 5, and a plurality of air rods 605 are fixedly connected to the surfaces of the plurality of air rollers 6, the plurality of air rods 605 are arranged in a ring shape, and one end of the plurality of air rollers 6 is provided with a rotating mechanism for rotating the air roller 6.

[0034] Preferably, the adjusting mechanism comprises two second limiting grooves 104, the two second limiting grooves 104 are symmetrically provided on the top of the support frame 7, and the inside of the two second limiting grooves 104 is respectively provided with a first limiting rod 201 and a first lead screw 202, the first limiting rod 201 is fixedly connected inside the second limiting groove 104, and the first lead screw 202 is rotatably connected inside the second limiting groove 104, the feeding plate 2 is sleeved on the surfaces of the first limiting rod 201 and the first lead screw 202, and the feeding plate 2 is arranged in cooperation with the first lead screw 202, one end of the first lead screw 202 is fixedly connected with a first motor 203, and the first motor 203 is fixedly connected on one side of the support frame 7.

[0035] Further, the moving mechanism comprises two first limiting grooves 102 which are symmetrically arranged in the support frame 7, two second limiting rods and two second lead screws 303 which are arranged in the two first limiting grooves 102 respectively, the second limiting rod is fixedly connected to the inside of the first limiting groove 102, the second lead screw 303 is rotatably connected to the inside of the first limiting groove 102, the same first connecting plate 302 is arranged on the surfaces of the second limiting rod and the second lead screw 303, and the first connecting plate 302 is arranged in cooperation with the second lead screw 303, the second motor 304 is fixedly connected to the side of the support frame 7 and the first connecting plate 302 is fixedly connected to the side of the feeding box 3.

[0036] Further, the limiting mechanism comprises a receiving groove 305 which is arranged in the inside of the feeding box 3, a support rod 306 which is slidably connected to the inside of the receiving groove 305, a limiting block 307 which is fixedly connected to the bottom of the support rod 306, and the limiting block 307 is arranged in cooperation with the third limiting groove 404, a first spring 308 which is arranged on the surface of the support rod 306, the top end of the first spring 308 is fixedly connected to the top side of the inside of the receiving groove 305, and the bottom end of the first spring 308 is fixedly connected to the top of the limiting block 307.

[0037] Preferably, the opening mechanism comprises a third connecting plate 505 which is slidably connected to the side of the combustion box 5, two top columns 506 which are fixedly connected to the surface of the side of the second baffle 502, and the two top columns 506 are arranged in cooperation with the second baffle 502, the third connecting plate 505 is fixedly connected to the bottom of the feeding box 3, two support columns 503 which are fixedly connected to the surface of the side of the combustion box 5, and the two support columns 503 are slidably connected to the side of the combustion box 5, two tension springs 504 which are arranged on the surfaces of the two support columns 503, one end of each of the two tension springs 504 is fixedly connected to the side of the second baffle 502, and the other end of each of the two tension springs 504 is fixedly connected to the inside of the combustion box 5.

[0038] Further, the rotating mechanism comprises a ratchet wheel 601 which is fixedly connected to the side of the wind roller 6, an adjusting arm 602 which is fixedly connected to the surface of the side of the ratchet wheel 601, a plurality of pawls 606 which are rotatably connected to the surface of the side of the adjusting arm 602, and the plurality of pawls 606 are arranged in cooperation with the ratchet wheel 601, two second springs 607 which are fixedly connected to the surface of the side of each of the plurality of pawls 606, the top end of each of the two second springs 607 is fixedly connected to the bottom of the adjusting arm 602, a flow guide disc 603 which is rotatably connected to the other end of the wind roller 6, a flow guide plate 604 which is fixedly connected to the other end of the flow guide disc 603, and the flow guide plate 604 is fixedly connected to the side of the combustion box 5.

[0039] The working principle of the present application is as follows: in use, first start the first motor 203, the output shaft of the first motor 203 is provided with the first lead screw 202, and the surface of the first lead screw 202 is provided with the feeding plate 2; since the feeding plate 2 slides in the storage bin 1, under the constraint of the storage bin 1, when the first lead screw 202 rotates, the feeding plate 2 moves forward, thereby pushing the fuel into the feeding box 3; when the fuel feeding is completed, start the second motor 304, the output shaft of the second motor 304 is provided with the second lead screw 303, the feeding box 3 is matched with the second lead screw 303 through the first connecting plate 302, and the first connecting plate 302 is constrained by the support frame 7, so that when the second lead screw 303 rotates, the feeding box 3 moves; the combustion box 5 is installed on one side of the support frame 7, so that with the continuous rotation of the second motor 304, the feeding box 3 finally moves to the top of the combustion box 5; the first discharge port 301 is formed in the bottom of the feeding box 3, and the first discharge port 301 is initially blocked by the first baffle 4, thereby ensuring that the feeding box 3 can normally transport; the constraint column 402 is installed on one side of the first baffle 4, and the constraint column 402 slides in the constraint groove 103; since the constraint groove 103 is shorter than the second lead screw 303, when the feeding box 3 drives the first baffle 4 to move to a certain extent, the constraint groove 103 constrains the first baffle 4 through the constraint column 402, so that the first baffle 4 stops moving; after the first baffle 4 stops moving, the feeding box 3 still moves, so that the first discharge port 301 at the bottom of the feeding box 3 can be matched with the second discharge port 403 at the top of the first baffle 4; when the first discharge port 301 is matched with the second discharge port 403, the fuel in the feeding box 3 can be poured; since the feeding box 3 is above the combustion box 5, and the first discharge port 301 is separately provided, the fuel can be uniformly distributed in the combustion box 5; the third connecting plate 505 is installed at the bottom of the feeding box 3, and the third connecting plate 505 slides in the combustion box 5, so that when the third connecting plate 505 moves with the feeding box 3, the ash in the combustion box 5 can be discharged; a plurality of air rollers 6 are installed in the combustion box 5, and the plurality of air rollers 6 are connected with the external air supply mechanism through the flow guide plate 604, so that the air rollers 6 can supply oxygen to the inside of the combustion box 5; the ratchet wheel 601 is installed on one side of the air roller 6, the surface of the ratchet wheel 601 is matched with a plurality of pawls 606, and the plurality of pawls 606 are connected with the third connecting plate 505 through the adjusting arm 602, so that when the third connecting plate 505 moves, the pawls 606 also move synchronously; since the pawls 606 and the ratchet wheel 601 are matched, when the third connecting plate 505 drives the pawls 606 to reset, the pawls 606 make the ratchet wheel 601 rotate, thereby driving the air roller 6 to rotate synchronously; the air roller 605 is installed on the surface of the air roller 6,Because the wind rod 605 is protrudingly arranged, when the wind roller 6 drives the wind rod 605 to rotate, the fuel inside the combustion box 5 can be mixed, so that the new fuel can be more fully combusted.

[0040] In conclusion, in the present application, the core benefit is that the fuel can be uniformly distributed by the arrangement of the first discharge port, the constraint column is arranged on one side of the first baffle, and the constraint column is slidingly arranged in the constraint groove, because the constraint groove is shorter than the second screw rod, when the feeding box drives the first baffle to move to a certain extent, the constraint groove will constrain the first baffle through the constraint column, so that the first baffle stops moving, after the first baffle stops moving, the feeding box will continue to move, so that the first discharge port at the bottom of the feeding box can cooperate with the second discharge port at the top of the first baffle, after the first discharge port cooperates with the second discharge port, the fuel in the feeding box can be poured, because the feeding box is above the combustion box, and the first discharge port is arranged separately, so that the fuel can be uniformly distributed in the interior of the combustion box.

[0041] The specific embodiments described herein are merely illustrative of the present application. Various modifications or changes can be made to the described embodiments without departing from the spirit of the application. The modifications or changes are intended to be within the scope of the application as defined by the appended claims.

Claims

1. A boiler feeding and combustion device, comprising a support frame (7), characterized in that, The support frame (7) is fixedly connected to a storage bin (1) at the top. A discharge port (101) is opened at the bottom of the storage bin (1). A feeding plate (2) is slidably connected inside the discharge port (101). An adjustment mechanism for adjusting the feeding plate (2) is provided on one side of the support frame (7). A feeding box (3) is slidably connected to one side of the support frame (7). A moving mechanism for moving the feeding box (3) is provided on one side of the feeding box (3). Three first discharge ports (301) are opened at the bottom of the feeding box (3). The feeding box (3) has a first baffle (4) slidably connected inside the side near the first discharge port (301). The top of the first baffle (4) near the three first discharge ports (301) has a second discharge port (403), and the second discharge ports (403) cooperate with the first discharge ports (301). The support frame (7) has two symmetrically opened constraint grooves (103) inside the side near the storage bin (1). Both constraint grooves (103) have constraint columns (402) slidably connected inside them. The constraining columns (402) are fixedly connected by the same second connecting plate (401). The second connecting plate (401) is fixedly connected to one side of the first baffle (4). The top of the first baffle (4) near the feed box (3) has two symmetrically opened third limiting grooves (404). The two third limiting grooves (404) are provided with limiting mechanisms for limiting the first baffle (4). The bottom of the support frame (7) away from the storage bin (1) is fixedly connected to a combustion box (5). The combustion box (5) has a limiting mechanism on one side. The slag discharge port (501) is slidably connected to a second baffle (502). The combustion box (5) is provided with an opening mechanism for opening the second baffle (502) on the side surface near the storage bin (1). Multiple air rollers (6) are rotatably connected inside the combustion box (5), and multiple air rods (605) are fixedly connected to the surface of each air roller (6). The multiple air rods (605) are evenly arranged in a ring. One end of each of the multiple air rollers (6) is provided with a rotating mechanism for rotating the air rollers (6).

2. The boiler feeding and combustion device according to claim 1, characterized in that, The adjustment mechanism includes two second limiting grooves (104), which are symmetrically opened on the top of the support frame (7). A first limiting rod (201) and a first lead screw (202) are respectively provided inside the two second limiting grooves (104). The first limiting rod (201) is fixedly connected to the inside of the second limiting groove (104), and the first lead screw (202) is rotatably connected to the inside of the second limiting groove (104). The feeding plate (2) is sleeved on the surface of the first limiting rod (201) and the first lead screw (202), and the feeding plate (2) and the first lead screw (202) are mutually cooperated. A first motor (203) is fixedly connected to one end of the first lead screw (202), and the first motor (203) is fixedly connected to one side of the support frame (7).

3. The boiler feeding and combustion device according to claim 1, characterized in that, The moving mechanism includes two first limiting grooves (102), and the two first limiting grooves (102) are symmetrically provided inside the support frame (7). The two first limiting grooves (102) are respectively provided with a second limiting rod and a second lead screw (303). The second limiting rod is fixedly connected inside the first limiting groove (102), and the second lead screw (303) is rotatably connected inside the first limiting groove (102). The second limiting rod and the second lead screw (303) are fitted with the same first connecting plate (302), and the first connecting plate (302) and the second lead screw (303) are mutually cooperated. The end of the second lead screw (303) near the first motor (203) is fixedly connected to a second motor (304). The second motor (304) is fixedly connected to one side of the support frame (7), and the first connecting plate (302) is fixedly connected to one side of the feeding box (3).

4. The boiler feeding and combustion device according to claim 1, characterized in that, The limiting mechanism includes a storage slot (305), which is located inside the feeding box (3). A support rod (306) is slidably connected inside the storage slot (305). A limiting block (307) is fixedly connected to the bottom of the support rod (306), and the limiting block (307) and the third limiting slot (404) are mutually coordinated. A first spring (308) is sleeved on the surface of the support rod (306). The top end of the first spring (308) is fixedly connected to the top side inside the storage slot (305), and the bottom end of the first spring (308) is fixedly connected to the top of the limiting block (307).

5. The boiler feeding and combustion device according to claim 1, characterized in that, The opening mechanism includes a third connecting plate (505), which is slidably connected to one side of the combustion box (5). Two top posts (506) are fixedly connected to the surface of the third connecting plate (505) near the second baffle (502), and the two top posts (506) cooperate with the second baffle (502). The third connecting plate (505) is fixedly connected to the bottom of the feeding box (3). Two support posts (503) are symmetrically fixedly connected to the surface of the second baffle (5) near the combustion box (5), and the two support posts (503) are slidably connected to one side of the combustion box (5). Tension springs (504) are sleeved on the surface of the two support posts (503). One end of the two tension springs (504) is fixedly connected to one side of the second baffle (502), and the other end of the two tension springs (504) is fixedly connected to one side of the inside of the combustion box (5).

6. The boiler feeding and combustion device according to claim 5, characterized in that, The rotating mechanism includes a ratchet (601), which is fixedly connected to one side of the air roller (6). An adjusting arm (602) is fixedly connected to the surface of the third connecting plate (505) near the ratchet (601). Multiple pawls (606) are rotatably connected to the surface of the adjusting arm (602) near the ratchet (601), and the multiple pawls (606) cooperate with the ratchet (601). Two second springs (607) are fixedly connected to the surface of the multiple pawls (606) near the adjusting arm (602). The tops of the two second springs (607) are fixedly connected to the bottom of the adjusting arm (602). A guide plate (603) is rotatably connected to the other end of the air roller (6). A guide plate (604) is fixedly connected to the other end of the guide plate (603). The guide plate (604) is fixedly connected to one side of the combustion box (5).

Images