Grate casting device for gasification furnace

Abstract

The invention relates to the technical field of industrial manufacturing, and discloses a gasifier grate casting device which comprises a sand screening and conveying device, a vibration device is movably mounted at the bottom of the sand screening and conveying device, a sand filtering device is fixedly mounted at the bottom of the sand screening and conveying device, and the vibration device is in transmission connection with the sand filtering device. A sand suction device is movably mounted on one side of the sand filtering device, suspended fine particles are sucked away through wind power by arranging the sand suction device, the situation that the fine suspended particles are embedded into the surface of a casting in circulating molding sand is avoided, sand vibration and screening are integrated by arranging the sand filtering device and integrating a roller sand filtering screen at the bottom of the sand vibrator, and the sand vibration and screening efficiency is improved. By arranging the vibration device and the screened sand conveying device, the molding sand on the casting is removed through vibration, the molding sand is recycled, the cost consumption is reduced, the uniformity of the molding sand subjected to thermal expansion is more stable, and the reduction of the defective rate of subsequent casting use is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial manufacturing, and more particularly to a grate casting device for a gasifier. Background Art

[0002] With the increasing demand for energy, the gasification technology of some renewable resources has received attention. During the gasification process, a grate that is resistant to high temperature and wear is required. Currently, the casting of grates usually uses sand casting.

[0003] The main steps of sand casting are: mold making, pouring of molten metal, cooling and post-treatment, and finishing. Among them, cooling and post-treatment include: cooling, sand cleaning, and heat treatment strengthening. In the prior art, most sand cleaning options are physical sand shaking. In the waste sand, refractory materials such as quartz sand and zircon sand account for more than 80%. If directly discarded, it is equivalent to wasting high-purity mineral resources. The recycling of sand shaking waste sand is not only a means to reduce costs, but also an inevitable requirement for environmental protection compliance, safe production, and sustainable development.

[0004] Secondly, the splashing sand particles during the sand shaking process will embed in the surface of the casting, forming "sand holes" defects. These defects not only damage the flatness of the casting surface, but also expose as honeycomb-shaped pits during subsequent machining, seriously affecting the reliability of the product.

[0005] In the screened sand, there are suspended particles. If the suspended particles are not removed, it will have a fatal impact on the performance of the recycled sand and the quality of the casting. The fine powder sinters into a glass phase under the action of high-temperature molten metal, resulting in uneven bumps on the surface of the casting.

[0006] In the casting sand treatment system, if large particles of sand are not screened out, a series of chain problems will occur. The large particles form "bridging voids" among the sand grains. When pouring, the molten metal drills into the voids, hindering the discharge of gas. Moreover, the large particles expand unevenly when heated, pulling the surface of the sand mold to form cracks.

[0007] In summary, there is an urgent need for a grate casting device for a gasifier that can screen recycled sand. Summary of the Invention

[0008] In order to overcome the above-mentioned defects of the prior art, the present invention provides a grate casting device for a gasifier to solve the problems existing in the above background art.

[0009] To achieve the above object, the present invention provides the following technical solution: A grate casting device for a gasifier, comprising a sand screening and conveying device, characterized in that: a vibration device is movably installed at the bottom of the sand screening and conveying device, a sand filtering device is fixedly installed at the bottom of the sand screening and conveying device, the vibration device is drivingly connected to the sand filtering device, a sand suction device is movably installed on one side of the sand filtering device, an output bevel gear is fixedly connected to one side of the sand filtering device, a bevel gear is fixedly connected to one side of the vibration device, and one side of the bevel gear meshes with one side of the output bevel gear.

[0010] Further, the sand screening and conveying device includes a sand screening plate, side plates are fixedly connected to both sides of the sand screening plate, an inclined plate is fixedly connected to one end of the sand screening plate, a T-shaped transmission plate is fixedly connected to one side of the side plate, a sand collecting groove is fixedly connected to the bottom of the sand screening plate, a sand dropping funnel is fixedly connected to one end of the sand collecting groove, and sand screening holes are formed inside the sand screening plate.

[0011] Further, the bottom of the T-shaped transmission plate is fixedly connected to a telescopic housing, the bottom of the telescopic housing is movably connected to a vibration housing, the bottom of the vibration housing is fixedly connected to a base, a spring housing is fixedly connected to the top of the base, a spring is fixedly connected inside the spring housing, and the top of the spring is fixedly connected to the bottom of the T-shaped transmission plate.

[0012] Further, a connecting column one is fixedly connected to one side of the bevel gear, a transmission wheel is fixedly connected to one side of the connecting column one, and a transmission belt is drivingly connected inside the transmission wheel.

[0013] Further, a transmission rod is fixedly connected to one side of the transmission wheel, an elliptical pin is fixedly connected to one end of the transmission rod, a fixing rod is fixedly connected to one side of the elliptical pin, a perforated coupling is movably connected to the middle of the fixing rod, a fixing pin is movably connected to the top of the perforated coupling, movable blocks are fixedly connected to both sides of the fixing pin, a reset cavity housing is fixedly connected to the top of the movable blocks, a reset spring is fixedly connected to the top inner cavity of the reset cavity housing, a conical top block is fixedly connected to the bottom of the reset spring, a reset rod is fixedly connected to the top of the conical top block, the reset rod is fixedly connected to the telescopic housing, the middle of the transmission rod passes through the inside of the base, and an activity groove is formed inside the base.

[0014] Further, the sand filtering device includes a sand filtering housing, rolling groove rings are movably connected to both sides of the sand filtering housing, a support plate is fixedly connected to the bottom of the sand filtering housing, a bearing support is fixedly connected to the top of the support plate, a roller transmission rod is movably connected to the middle of the bearing support, a connecting column two is fixedly connected to one end of the roller transmission rod, an output bevel gear is fixedly connected to one end of the connecting column two, rollers are fixedly connected to both ends of the roller transmission rod, and narrow legs are fixedly connected to the bottom of the bearing support.

[0015] Furthermore, a sand filtering drum is fixedly connected to the inner wall of the rolling groove ring. Sand filtering holes are formed in the side wall of the sand filtering drum, and a sand receiving shell is movably installed on one side of the sand filtering drum.

[0016] Furthermore, a drive rod gear is fixedly installed in the middle of the drum drive rod. A drive chain is meshed outside the drive rod gear. One end of the drive chain is meshed with a motor drive gear. A motor is fixedly connected to the middle of the motor drive gear, and a support plate is fixedly connected to one end of the motor.

[0017] Furthermore, narrow support legs are fixedly connected to the bottom of the sand filtering housing. A circulating sand outlet is fixedly installed at one end of the sand filtering housing, and both sides of the circulating sand outlet are fixedly connected to one side of the narrow support legs.

[0018] Furthermore, a sand receiving port is formed in the side wall of the sand receiving shell. A bearing is fixedly connected to one end of the sand receiving shell. A sand blowing fan is fixedly installed inside the bearing, and a sand blowing support is fixedly connected to the bottom of the sand receiving shell. [[ID=】]12

[0019] Technical effects and advantages of the present invention: 1. By providing a sand suction device, the present invention uses wind power to suck away suspended fine particles, avoiding the embedding of fine suspended particles on the surface of the casting in the circulating molding sand, preventing "sand holes" from forming on the subsequent casting surface, reducing the defect rate of the casting, and reducing the entry of dust into the equipment and the wear of components such as the bearings and springs of the vibratory sander, which is beneficial to improving the yield rate of the casting and the service life of the equipment.

[0020] 2. By providing a sand filtering device, the present invention integrates a drum sand filtering screen at the bottom of the vibratory sieve, realizing the integration of sand vibration and screening, and synchronously completing "sand vibration - screening - waste discharge", reducing the floor area of the equipment, improving the yield rate of the circulating sand, and further improving the yield rate of the subsequent casting.

[0021] 3. By providing a vibration device and a sand screening and conveying device, the present invention removes the molding sand on the casting through vibration and cleans the molding sand in the grate air duct, which is beneficial to the uniform heating of the grate during use, reduces the replacement frequency, recovers the molding sand, reduces cost consumption, and the uniformity of the molding sand after thermal expansion is more stable, which is beneficial to reducing the defective rate of the subsequent casting. Description of the drawings

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a transmission schematic diagram of the vibration device and the sand filtering device of the present invention; Figure 3 is a schematic diagram of the overall sand screening and conveying device of the present invention; Figure 4 Schematic cross-sectional view of the sand screening and conveying device of the present invention; Figure 5 Overall schematic view of the vibration device of the present invention; Figure 6 Schematic cross-sectional view of the vibration device of the present invention; Figure 7 Schematic view of the sand filtering device of the present invention; Figure 8 Schematic cross-sectional view of the sand filtering device of the present invention; Figure 9 Schematic view of the bottom drive of the sand filtering device of the present invention; Figure 10 Schematic view of the circulating sand outlet of the present invention; Figure 11 Overall schematic view of the sand suction device of the present invention; Reference numerals are: 1. Sand screening and conveying device; 101. Sand screening plate; 102. Side plate; 103. T-shaped drive plate; 104. Inclined plate; 105. Sand collecting tank; 106. Sand dropping funnel; 107. Sand screening holes; 2. Vibration device; 201. Base; 202. Transmission wheel; 203. Vibration housing; 204. Spring housing; 205. Spring; 206. Telescopic housing; 207. Transmission belt; 208. Bevel gear; 209. Connecting column 1; 210. Transmission rod; 211. Oval pin; 212. Fixed rod; 213. Perforated coupling; 214. Fixed pin; 215. Movable block; 216. Conical top block; 217. Return spring; 218. Return rod; 219. Return cavity housing; 220. Movable slot; 3. Sand filtering device; 301. Sand filtering housing; 302. Rolling groove ring; 303. Narrow support leg; 304. Sand filtering holes; 305. Motor drive gear; 306. Output bevel gear; 307. Connecting column 2; 308. Drum transmission rod; 309. Roller; 310. Bearing support; 311. Support plate; 312. Motor; 313. Transmission chain; 314. Sand filtering drum; 315. Transmission rod gear; 316. Circulating sand outlet; 4. Sand suction device; 401. Sand receiving shell; 402. Sand receiving port; 403. Bearing; 404. Sand blowing fan; 405. Sand blowing support. Detailed implementation manners

[0023] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and a grate casting device for a gasifier involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0024] Refer toFigure 1 , Figure 2 , the present invention provides a grate casting device for a gasifier. A vibration device 2 is movably installed at the bottom of the sand screening and conveying device 1, a sand filtering device 3 is fixedly installed at the bottom of the sand screening and conveying device 1, the vibration device 2 is in transmission connection with the sand filtering device 3, a sand suction device 4 is movably installed on one side of the sand filtering device 3, a output bevel gear 306 is fixedly connected to one side of the sand filtering device 3, a bevel gear 208 is fixedly connected to one side of the vibration device 2, and one side of the bevel gear 208 meshes with one side of the output bevel gear 306; A motor 312 is installed at the bottom of the sand filtering device 3 to drive the operation of the bevel gear 208 and the output bevel gear 306, so that the vibration device 2 and the sand filtering device 3 operate. The right side of the sand screening and conveying device 1 deflects downward, and the casting is transported to the right by gravity and the vibration generated by the vibration device 2. The right side of the sand filtering device 3 also deflects downward, and the molding sand is poured out to the right by gravity and the rolling of the sand filtering drum 314. Vibration devices 2 are respectively arranged below the four corners of the sand screening and conveying device 1 to make the vibration more uniform.

[0025] Refer to Figure 3 , Figure 4 , the present invention provides a grate casting device for a gasifier. The sand screening and conveying device 1 includes a sand screening plate 101, side plates 102 are fixedly connected to both sides of the sand screening plate 101, an inclined plate 104 is fixedly connected to one end of the sand screening plate 101, a T-shaped transmission plate 103 is fixedly connected to one side of the side plate 102, a sand collecting tank 105 is fixedly connected to the bottom of the sand screening plate 101, a sand dropping funnel 106 is fixedly connected to one end of the sand collecting tank 105, and sand screening holes 107 are formed inside the sand screening plate 101; The left side of the sand collecting tank 105 deflects downward, and the molding sand is poured into the sand dropping funnel 106 by gravity and vibration. The bottom and side surfaces of the sand collecting tank 105 are both closed to prevent the leakage of the molding sand. The side plate 102 prevents the casting from falling out of the sand screening and conveying device 1 during vibration, and the sand screening holes 107 separate the molding sand and the casting.

[0026] Refer to Figure 5 , the present invention provides a grate casting device for a gasifier. A telescopic housing 206 is fixedly connected to the bottom of the T-shaped transmission plate 103, a vibration housing 203 is movably connected to the bottom of the telescopic housing 206, a base 201 is fixedly connected to the bottom of the vibration housing 203, a spring housing 204 is fixedly connected to the top of the base 201, a spring 205 is fixedly connected inside the spring housing 204, and the top of the spring 205 is fixedly connected to the bottom of the T-shaped transmission plate 103; The spring housing 204 prevents the deformation and dislocation of the spring 205. The vibrating housing 203 provides the movement track and movement range of the telescopic housing 206. The spring 205 enables the T-shaped drive plate 103 to reset during vibration and provides a reset vibration. When the vibration device 2 is not operating, it is supported by the internal support device of the vibrating housing 203, and the spring 205 is only auxiliary.

[0027] Referring to Figure 5 , the present invention provides a grate casting device for a gasifier. One side of the bevel gear 208 is fixedly connected to a connecting column 209. One side of the connecting column 209 is fixedly connected to a transmission wheel 202. The inside of the transmission wheel 202 is drivingly connected to a transmission belt 207; the rotation of the transmission wheel 202 drives the transmission belt 207 to drive, and the four vibrating devices 2 are linked, so that the four vibrating devices 2 move synchronously.

[0028] Referring to Figure 6 , the present invention provides a grate casting device for a gasifier. One side of the transmission wheel 202 is fixedly connected to a transmission rod 210. One end of the transmission rod 210 is fixedly connected to an elliptical pin 211. One side of the elliptical pin 211 is fixedly connected to a fixing rod 212. The middle of the fixing rod 212 is movably connected to a perforated coupling 213. The top of the perforated coupling 213 is movably connected to a fixing pin 214. Both sides of the fixing pin 214 are fixedly connected to movable blocks 215. The top of the movable blocks 215 is fixedly connected to a reset cavity housing 219. The top of the inner cavity of the reset cavity housing 219 is fixedly connected to a reset spring 217. The bottom of the reset spring 217 is fixedly connected to a conical top block 216. The top of the conical top block 216 is fixedly connected to a reset rod 218. The top of the reset rod 218 is fixedly connected to the telescopic housing 206. The middle of the transmission rod 210 passes through the inside of the base 201, and an activity groove 220 is opened inside the base 201; After the transmission wheel 202 rotates, it drives the transmission rod 210, so that the elliptical pin 211 rotates and pulls the perforated coupling 213 to make a rotary reciprocating motion, and drives the movable blocks 215 and the reset cavity housing 219 to expand and contract up and down. When the movable blocks 215 are pushed up, the reset spring 217 drives the conical top block 216 and the reset rod 218 to move upward to eliminate the tension, generating vibration on the sand screening and conveying device 1. When the reset rod 218 moves upward, the movable blocks 215 move downward, and the reset spring 217 drives the reset rod 218 to move downward to eliminate the pressure, and so on, generating a uniform and frequent vibration on the sand screening and conveying device 1; when the vibrating device 2 moves up and down, the spring 205 will generate stress on the movement between the sand screening and conveying device 1 and the vibrating device 2, further increasing the vibration frequency.

[0029] Referring to Figure 7, the present invention provides a grate casting device for a gasifier. The sand filtering device 3 includes a sand filtering housing 301. Rolling groove rings 302 are movably connected to both sides of the sand filtering housing 301. A support plate 311 is fixedly connected to the bottom of the sand filtering housing 301. A bearing support 310 is fixedly connected to the top of the support plate 311. A roller drive rod 308 is movably connected to the middle of the bearing support 310. A connecting column two 307 is fixedly connected to one end of the roller drive rod 308. An output bevel gear 306 is fixedly connected to one end of the connecting column two 307. Rollers 309 are fixedly connected to both ends of the roller drive rod 308. Narrow support legs 303 are fixedly connected to the bottom of the bearing support 310; The roller drive rod 308 drives the rollers 309, the connecting column two 307, and the sand dropping funnel 106. The bearing support 310 only restricts the position of the roller drive rod 308 and does not restrict the rotation of the roller drive rod 308. The frictional force generated between the rollers 309 and the rolling groove rings 302 causes the rolling groove rings 302 to rotate. The support plate 311 and the narrow support legs 303 provide the stability of the sand filtering device 3 and fix the sand filtering housing 301 to prevent it from rotating.

[0030] Refer to Figure 8 , the present invention provides a grate casting device for a gasifier. A sand filtering roller 314 is fixedly connected to the inner wall of the rolling groove ring 302. Sand filtering holes 304 are provided on the side wall of the sand filtering roller 314. A sand receiving shell 401 is movably installed on one side of the sand filtering roller 314; The rotation of the rolling groove ring 302 drives the sand filtering roller 314 to rotate. The sand receiving shell 401 only adheres to the inner wall of the sand filtering roller 314 and does not affect the rotation of the sand filtering roller 314. The sand filtering holes 304 retain the oversized molding sand and filter the appropriate molding sand into the cavity between the sand filtering roller 314 and the sand filtering housing 301. The aperture of the sand filtering holes 304 is smaller than that of the sand screening holes 107, and the specific size varies according to the molding sand used.

[0031] Refer to Figure 9 , the present invention provides a grate casting device for a gasifier. A drive rod gear 315 is fixedly installed in the middle of the roller drive rod 308. A drive chain 313 is meshed with the outside of the drive rod gear 315. One end of the drive chain 313 is meshed with a motor drive gear 305. A motor 312 is fixedly connected to the middle of the motor drive gear 305. One end of the motor 312 is fixedly connected to the support plate 311; The motor 312 connects two motor drive gears 305 to make them rotate. The motor drive gear 305 drives the rotation of the drive chain 313 and meshes with the drive rod gear 315 to realize the rotation of the roller drive rod 308.

[0032] [[ID=I7]]Refer to Figure 10, the present invention provides a grate casting device for a gasifier. A narrow support leg 303 is fixedly connected to the bottom of the filter sand housing 301. One end of the filter sand housing 301 is fixedly installed with a circulating sand outlet 316. Both sides of the circulating sand outlet 316 are fixedly connected to one side of the narrow support leg 303; there is a circulating sand outlet 316 in the middle of the narrow support leg 303, which is the outlet for filtering the molding sand. A magnetic device can be arranged inside the circulating sand outlet 316 to remove impurities in the molding sand.

[0033] Referring to Figure 11 , the present invention provides a grate casting device for a gasifier. A sand receiving port 402 is provided on the side wall of the sand receiving shell 401. One end of the sand receiving shell 401 is fixedly connected to a bearing 403. A sand blowing fan 404 is fixedly installed inside the bearing 403. The bottom of the sand receiving shell 401 is fixedly connected to a sand blowing support 405; The sand receiving port 402 is aligned with the sand outlet of the sand dropping funnel 106. To prevent being affected by vibration, it is not connected to the sand dropping funnel 106. The sand blowing fan 404 is connected to an external control device to generate suction and suck away the fine particles in the molding sand falling from the sand dropping funnel 106. A wind bag can be arranged on the other side of the bearing 403 to collect the fine particles and reduce pollution.

[0034] The working principle of the present invention: When the motor 312 starts to operate, it drives the roller drive rod 308 and the roller 309 to rotate through the transmission chain 313. The roller 309 drives the rolling groove ring 302 to rotate by using friction, and makes the filter sand roller 314 rotate inside the filter sand housing 301 to screen the molding sand. The bearing support 310 limits both ends of the roller drive rod 308. The rotation of the output bevel gear 306 drives the meshing bevel gear 208. The rotation of the bevel gear 208 drives the transmission wheel 202 and the drive rod 210. The rotation of the transmission wheel 202 makes the transmission belt 207 start to operate, so that the drive rods 210 inside the four vibration devices 2 operate and rotate synchronously; The rotation of the drive rod 210 makes the elliptical pin 211 rotate and pull the perforated coupling 213 to make a reciprocating rotational motion, and drives the movable block 215 and the reset cavity housing 219 to expand and contract up and down. When the movable block 215 moves upward, the reset spring 217 drives the conical top block 216 and the reset rod 218 to move upward to eliminate the tension, and vibrates the sand screening and conveying device 1. When the reset rod 218 moves upward, the movable block 215 moves downward. The reset spring 217 drives the reset rod 218 to move downward to eliminate the pressure, and so on, generating a uniform and frequent vibration for the sand screening and conveying device 1; When the vibration device 2 moves up and down, the spring 205 will generate stress on the movement between the sand screening and conveying device 1 and the vibration device 2; After the T-shaped transmission plate 103 is vibrated by the vibration device 2, it feeds back to the sand collecting groove 105 and the sand screening plate 101. After the casting is transported to the left side of the sand screening plate 101, under the action of vibration and the inclined plane of the sand screening plate 101, the casting moves towards the inclined plate 104 until it leaves the device. During this period, the molding sand attached to the casting is shaken off by vibration. The molding sand is screened through the sand screening holes 107 into the interior of the sand collecting groove 105, and also moves towards the left sand dropping funnel 106 under the action of the inclined plane and vibration of the sand collecting groove 105. During the process of the molding sand falling from the sand dropping funnel 106, the suction of the sand blowing fan 404 sucks the fine particles contained in the molding sand. After falling into the interior of the sand receiving shell 401, since both the sand receiving shell 401 and the sand filtering device 3 are inclined to the left, the molding sand enters the interior of the sand filtering drum 314. Through the rolling and screening of the sand filtering drum 314, the over-sized particles inside the molding sand are retained, and the medium-sized particles, i.e., the recycled molding sand, are screened into the cavity formed by the sand filtering outer shell 301 and the sand filtering drum 314, and fall and are collected through the recycled sand outlet 316.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A grate casting device for a gasifier, comprising a sand screening and conveying device (1), characterized in that: A vibration device (2) is movably installed at the bottom of the sand screening and conveying device (1). A sand filtering device (3) is fixedly installed at the bottom of the sand screening and conveying device (1). The vibration device (2) is in transmission connection with the sand filtering device (3). A sand suction device (4) is movably installed on one side of the sand filtering device (3). An output bevel gear (306) is fixedly connected to one side of the sand filtering device (3). A bevel gear (208) is fixedly connected to one side of the vibration device (2). One side of the bevel gear (208) meshes with one side of the output bevel gear (306).

2. The casting device for the grate of a gasifier according to claim 1, characterized in that: The sand screening and conveying device (1) includes a sand screening plate (101). Side plates (102) are fixedly connected to both sides of the sand screening plate (101). An inclined plate (104) is fixedly connected to one end of the sand screening plate (101). A T-shaped transmission plate (103) is fixedly connected to one side of the side plate (102). A sand collecting groove (105) is fixedly connected to the bottom of the sand screening plate (101). A sand dropping funnel (106) is fixedly connected to one end of the sand collecting groove (105). Sand screening holes (107) are formed inside the sand screening plate (101).

3. The casting device for the grate of a gasifier according to claim 2, characterized in that: A telescopic housing (206) is fixedly connected to the bottom of the T-shaped transmission plate (103). A vibration housing (203) is movably connected to the bottom of the telescopic housing (206). A base (201) is fixedly connected to the bottom of the vibration housing (203). A spring housing (204) is fixedly connected to the top of the base (201). A spring (205) is fixedly connected inside the spring housing (204). The top of the spring (205) is fixedly connected to the bottom of the T-shaped transmission plate (103).

4. A grate casting device for a gasifier according to claim 1, characterized in that: A connecting column one (209) is fixedly connected to one side of the bevel gear (208). A transmission wheel (202) is fixedly connected to one side of the connecting column one (209). A transmission belt (207) is internally connected to the transmission wheel (202).

5. The casting device for the grate of a gasifier according to claim 4, characterized in that: A transmission rod (210) is fixedly connected to one side of the transmission wheel (202). An elliptical pin (211) is fixedly connected to one end of the transmission rod (210). A fixing rod (212) is fixedly connected to one side of the elliptical pin (211). A perforated coupling (213) is movably connected to the middle of the fixing rod (212). A fixing pin (214) is movably connected to the top of the perforated coupling (213). Moving blocks (215) are fixedly connected to both sides of the fixing pin (214). A reset cavity housing (219) is fixedly connected to the top of the moving blocks (215). A reset spring (217) is fixedly connected to the top of the inner cavity of the reset cavity housing (219). A conical top block (216) is fixedly connected to the bottom of the reset spring (217). A reset rod (218) is fixedly connected to the top of the conical top block (216). The top of the reset rod (218) is fixedly connected to the telescopic housing (206). The middle of the transmission rod (210) passes through the inside of the base (201). An activity groove (220) is formed inside the base (201).

6. The casting device for the grate of a gasifier according to claim 1, characterized in that: The sand filtering device (3) includes a sand filtering outer shell (301). Rolling groove rings (302) are movably connected to both sides of the sand filtering outer shell (301). A support plate (311) is fixedly connected to the bottom of the sand filtering outer shell (301). A bearing support (310) is fixedly connected to the top of the support plate (311). A roller drive rod (308) is movably connected to the middle of the bearing support (310). A second connecting column (307) is fixedly connected to one end of the roller drive rod (308). An output bevel gear (306) is fixedly connected to one end of the second connecting column (307). Rollers (309) are fixedly connected to both ends of the roller drive rod (308). Narrow support legs (303) are fixedly connected to the bottom of the bearing support (310).

7. The casting device for the grate of a gasifier according to claim 6, characterized in that: A sand filtering roller (314) is fixedly connected to the inner wall of the rolling groove ring (302). Sand filtering holes (304) are formed in the side wall of the sand filtering roller (314). A sand receiving shell (401) is movably installed on one side of the sand filtering roller (314).

8. A grate casting device for a gasifier according to claim 6, characterized in that: A drive rod gear (315) is fixedly installed in the middle of the roller drive rod (308). A drive chain (313) is engaged with the outside of the drive rod gear (315). A motor drive gear (305) is engaged with one end of the drive chain (313). A motor (312) is fixedly connected to the middle of the motor drive gear (305). One end of the motor (312) is fixedly connected to the support plate (311).

9. The casting device for the grate of a gasifier according to claim 6, characterized in that: Narrow support legs (303) are fixedly connected to the bottom of the sand filtering outer shell (301). A circulating sand outlet (316) is fixedly installed at one end of the sand filtering outer shell (301). Both sides of the circulating sand outlet (316) are fixedly connected to one side of the narrow support legs (303).

10. A grate casting device for a gasifier according to claim 7, characterized in that: A sand receiving port (402) is formed in the side wall of the sand receiving shell (401). A bearing (403) is fixedly connected to one end of the sand receiving shell (401). A sand blowing fan (404) is fixedly installed inside the bearing (403). A sand blowing support (405) is fixedly connected to the bottom of the sand receiving shell (401).

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