Spraying device and method for high-temperature wear-resistant valve

Abstract

The present invention relates to the technical field of valve manufacturing and processing. Disclosed are a spraying device and method for a high-temperature wear-resistant valve. The spraying device comprises a base plate (1), wherein a first hydraulic cylinder (5) is fixedly connected to an upper surface of the base plate (1) adjacent to a left side edge, an output end of the first hydraulic cylinder (5) is fixedly connected to a first piston rod (6), and the first piston rod (6), at the end away from the first hydraulic cylinder (5), is fixedly connected to a first movable base (2), a first servo motor (3) is fixedly connected to an upper surface of the first movable base (2), an output end of the first servo motor (3) is fixedly connected to a first rotating shaft (20), a cylindrical surface of the first rotating shaft (20), at the end away from the first servo motor (3), is fixedly connected to a rotating disc (4), and a receiving assembly (7) is provided on an upper surface of the rotating disc (4). Transferring the sprayed high-temperature valve to the receiving assembly (7) prevents a second pneumatic internal expanding fixture (21) from being occupied during a cooling process of the valve, such that the second pneumatic internal expanding fixture (21) can quickly be available for processing a subsequent valve, thereby improving the working efficiency of the device.

Description

A high-temperature wear-resistant valve spraying device and spraying method Technical Field

[0001] The present invention relates to the technical field of valve production and processing, in particular to a high-temperature wear-resistant valve spraying device and a spraying method. Background Art

[0002] Steam turbines contain a large number of heat-resistant and wear-resistant valve components, including valve stems (for nuclear power applications), housing sealing surfaces, valve discs, valve seats, sleeves, bushings, and high-temperature flow-through components. These components operate in high temperatures, requiring their working surfaces to possess a certain degree of red hardness to ensure wear resistance and high-temperature performance, thereby extending the service life of the components. To ensure the valve's strength meets operational requirements, a metal-ceramic coating is typically applied to the valve body's working surface using spray equipment.

[0003] The spraying equipment heats and melts the coating material, atomizes it into extremely fine particles with a high-speed airflow, and sprays it onto the surface of the workpiece at a very high speed to form a coating. However, the temperature of the valve body after spraying is very high. The operator needs to wait for the temperature of the valve body to drop to a safe range before removing the valve body from the equipment after the spraying operation, which reduces the efficiency of the equipment. Technical issues

[0004] In response to the shortcomings of the existing technology, the present invention provides a high-temperature wear-resistant valve spraying device and spraying method, which solves the problem that after the spraying operation is completed, the staff needs to wait for the valve body to cool to a safe temperature before removing the valve body from the equipment, thereby improving the utilization efficiency of the equipment. Technical Solutions

[0005] The base comprises a first movable base having a T-shaped connecting block at the bottom thereof that engages a T-slot. The upper surface of the first movable base is fixedly connected to a first servo motor, the output end of the first servo motor being fixedly connected to a first rotating shaft, the cylindrical surface of the first rotating shaft being fixedly connected to a rotating disk away from the first servo motor. The upper surface of the rotating disk is provided with a material receiving assembly, and the number of the material receiving assemblies is uniformly distributed about the axis of the rotating disk. The upper surface of the base plate is fixedly connected to a second hydraulic cylinder near the rear edge, the output end of the second hydraulic cylinder being fixedly connected to a second piston rod, and the second piston rod being fixedly connected to a cleaning assembly away from the second hydraulic cylinder. The provision of the first servo motor and the first rotating shaft facilitates the return of the next material receiving assembly to the position of the previous material receiving assembly after each rotation. The provision of the material receiving assembly facilitates the temporary storage of the sprayed valve body and allows it to cool on the material receiving assembly, thereby freeing the second internal expansion pneumatic clamp to continue clamping the next valve body, thereby improving equipment efficiency. The provision of the cleaning assembly facilitates the rapid cleaning of the surface of the valve body to be sprayed to ensure the spraying effect.

[0006] Preferably, the material receiving assembly includes a first air pump, a first ventilation pipe, a first internal expansion pneumatic clamp, a support plate, a fixed shaft, a rotating rod, an infrared thermometer, and a warning light. The first air pump is fixedly connected to the upper surface of the rotating disk, the first ventilation pipe is fixedly connected to the output end of the first air pump, and the first internal expansion pneumatic clamp is fixedly connected to the first ventilation pipe. The first internal expansion pneumatic clamp is provided to facilitate the clamping of the valve body after spraying.

[0007] Preferably, the support plate is fixedly connected to the upper surface of the first air pump, the fixed shaft is fixedly connected to the side surface of the support plate, and the warning light is fixedly connected to the upper surface of the support plate. The warning light is provided to facilitate receiving the signal transmitted by the infrared thermometer and emitting a corresponding warning light.

[0008] Preferably, the rotating rod is rotatably connected to the cylindrical surface of the fixed shaft, and the infrared thermometer is fixedly connected to the side surface of the rotating rod. The infrared thermometer is connected to the warning light via a data cable. The rotating rod is provided to facilitate adjustment of the angle of the infrared thermometer so that it can be directed toward the valve body surface after spraying. The infrared thermometer is provided to facilitate measurement of the valve body surface temperature.

[0009] Preferably, the cleaning assembly includes a connecting plate, a cleaning sponge, a water-absorbing sponge, and a hot air blower. The connecting plate is fixedly connected to the end of the second piston rod away from the second hydraulic cylinder. The cleaning sponge is fixedly connected to the lower surface of the connecting plate near the second hydraulic cylinder. The water-absorbing sponge is fixedly connected to the lower surface of the connecting plate. The water-absorbing sponge is between the cleaning sponge and the hot air blower. The hot air blower is fixedly connected to the lower surface of the connecting plate away from the second hydraulic cylinder. The cleaning sponge is provided to facilitate cleaning the surface of the rotating valve body when it comes into contact with the surface of the rotating valve body. The water-absorbing sponge is provided to facilitate absorbing moisture remaining on the surface of the rotating valve body after being cleaned by the cleaning sponge when it comes into contact with the surface of the rotating valve body. The hot air blower is provided to facilitate drying the valve body to ensure that no moisture remains on the valve body surface.

[0010] Preferably, the upper surface of the base plate is fixedly connected to the third hydraulic cylinder near the right edge, the output end of the third hydraulic cylinder is fixedly connected to the third piston rod, and the third piston rod is fixedly connected to the second movable base away from the third hydraulic cylinder, and a T-shaped connecting block stuck in the T-shaped slot is provided at the bottom of the second movable base.

[0011] Preferably, the upper surface of the second movable base is fixedly connected to a second servo motor, an output end of the second servo motor is fixedly connected to a second rotating shaft, and the second rotating shaft is fixedly connected to the mounting plate away from the second servo motor. The second servo motor is provided to facilitate the rotation of the valve body.

[0012] Preferably, the placement plate is fixedly connected to the second air pump away from the second rotating shaft, the output end of the second air pump is fixedly connected to the second ventilation pipe, the second ventilation pipe is fixedly connected to the second internal expansion pneumatic clamp away from the second air pump, the second internal expansion pneumatic clamp and the first internal expansion pneumatic clamp have the same specifications, and the axial center line of the second ventilation pipe coincides with the axial center line of the first ventilation pipe closest to the second movable base.

[0013] Preferably, the upper surface of the bottom plate is fixedly connected to a sprayer near the front edge, and the nozzle of the sprayer is horizontally perpendicular to the axis of the second ventilation pipe and the first ventilation pipe.

[0014] A spraying method for a high-temperature wear-resistant valve spraying device comprises the following steps:

[0015] S1. Place the circular hole on the center of the valve body to be sprayed on the second internal expansion pneumatic fixture. Start the second air pump to expand the second internal expansion pneumatic fixture to clamp the valve body.

[0016] S2. Start the second hydraulic cylinder to drive the second piston rod to move the cleaning assembly forward until the cleaning assembly completely crosses the valve body axis:

[0017] S3. Start the third hydraulic cylinder to drive the third piston rod to drive the second movable base, thereby driving the valve body to move until the valve body reaches the initial spraying position:

[0018] S4. Start the second servo motor to drive the second rotating shaft to rotate, thereby driving the clamped valve body to rotate. Then start the second hydraulic cylinder to drive the second piston rod to drive the cleaning assembly back to its initial position. In this process, the valve body surface is cleaned:

[0019] S5. Start the sprayer to spray the valve body surface. Simultaneously start the third hydraulic cylinder to drive the third piston rod to move the valve body until the spraying operation is completed. Turn off the sprayer, the third hydraulic cylinder, and the second servo motor.

[0020] S6. Activate the first hydraulic cylinder to drive the first piston rod, which in turn moves the first movable base toward the second movable base until the first internal expansion pneumatic clamp of the material receiving assembly enters the unclamped end of the internal circular hole of the valve body. Activate the first air pump to expand the first internal expansion pneumatic clamp, thereby clamping the sprayed valve body. Close the second air pump to reset the second internal expansion pneumatic clamp. Activate the first hydraulic cylinder to return the first movable base to its original position. Simultaneously, activate the third hydraulic cylinder to return the second movable base to its original position.

[0021] S7. Start the first servo motor to drive the rotating disk to rotate a fixed angle via the first rotating shaft, so that the next receiving component rotates to the position where the previous receiving component holding the sprayed valve body was located.

[0022] S8. After the temperature of the valve body after spraying drops to a safe range, turn off the first air pump to reset the first internal expansion pneumatic clamp, and then remove the valve body.

[0023] Working principle: After the spraying operation is completed, the first internal expansion pneumatic clamp is passed into the valve body and expands under the action of the first air pump to complete the clamping of the valve body, and the second internal expansion pneumatic clamp is reset to complete the transfer of the valve body, thereby transferring the high-temperature valve body to the receiving assembly. At this time, the second internal expansion pneumatic clamp can return to the initial position to continue clamping the next valve body and carry out the next round of processing. The high-temperature valve body will cool down in the receiving assembly until it cools to a safe temperature and is removed. This avoids the problem that the processed valve body needs to wait for the temperature to drop to a safe range before it can be removed from the second internal expansion pneumatic clamp, thereby reducing waiting time and improving the working efficiency of the equipment. Beneficial effects

[0024] The present invention provides a high-temperature wear-resistant valve spraying device and spraying method. It has the following beneficial effects:

[0025] 1. By transferring the high-temperature valve body after spraying to the material receiving assembly, the time of the second internal expansion pneumatic clamp waiting for the valve body to cool down is avoided, so that the second internal expansion pneumatic clamp can quickly process the next valve body, thereby improving the working efficiency of the equipment.

[0026] 2. The surface of the rotating valve body is cleaned by the cleaning component to ensure that there is no stain between the coating and the valve body, thereby ensuring the spraying quality.

[0027] 3. The valve body surface temperature is detected by an infrared detector and the data is transmitted to the warning light. The warning light will emit different signal lights so that the staff can understand the status of the valve body temperature in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the overall structure of a high-temperature wear-resistant valve spraying device proposed by the present invention;

[0029] FIG2 is a schematic structural diagram of the left side of the bottom plate of a high-temperature wear-resistant valve spraying device proposed by the present invention;

[0030] FIG3 is a schematic structural diagram of a material receiving mechanism of a high-temperature wear-resistant valve spraying device proposed by the present invention;

[0031] FIG4 is a schematic structural diagram of a cleaning component of a high-temperature wear-resistant valve spraying device proposed by the present invention;

[0032] FIG5 is a schematic cross-sectional view of the installation position of a rotating disk of a high-temperature wear-resistant valve spraying device proposed by the present invention;

[0033] FIG6 is an enlarged view of the local structure at point A of a high-temperature wear-resistant valve spraying device proposed by the present invention.

[0034] Among them, 1. bottom plate; 2. first movable base; 3. first servo motor; 4. rotating disk; 5. first hydraulic cylinder; 6. first piston rod; 7. material receiving assembly; 701. first air pump; 702. first ventilation pipe; 703. first internal expansion pneumatic clamp; 704. support plate; 705. fixed shaft; 706. rotating rod; 707. infrared thermometer; 708. warning light; 8. second hydraulic cylinder; 9. second piston rod; 10. cleaning assembly; 1001. connecting plate; 1002. cleaning sponge; 1003. water-absorbing sponge; 1004. hot air blower; 11. second ventilation pipe; 12. second air pump; 13. placement plate; 14. second rotating shaft; 15. second servo motor; 16. second movable base; 17. third hydraulic cylinder; 18. third piston rod; 19. sprayer; 20. first rotating shaft; 21. second internal expansion pneumatic clamp. Best Mode for Carrying Out the Invention

[0035] As shown in Figures 1-6, an embodiment of the present invention provides a high-temperature wear-resistant valve spraying device, including a base plate 1, a T-shaped slot is provided in the center of the base plate 1, the upper surface of the base plate 1 is fixedly connected to the first hydraulic cylinder 5 near the left edge, the output end of the first hydraulic cylinder 5 is fixedly connected to the first piston rod 6, the first piston rod 6 is fixedly connected to the first movable base 2 away from the first hydraulic cylinder 5, a T-shaped connecting block is provided at the bottom of the first movable base 2 that is stuck in the T-shaped slot, the upper surface of the first movable base 2 is fixedly connected to the first servo motor 3, the output end of the first servo motor 3 is fixedly connected to the first rotating shaft 20, and the cylindrical surface of the first rotating shaft 20 is away from The first servo motor 3 is fixedly connected to the rotating disk 4, and a material receiving assembly 7 is provided on the upper surface of the rotating disk 4. There are multiple material receiving assemblies 7 and they are evenly distributed about the axis of the rotating disk 4. The upper surface of the base plate 1 is fixedly connected to the second hydraulic cylinder 8 near the rear edge, and the output end of the second hydraulic cylinder 8 is fixedly connected to the second piston rod 9. The second piston rod 9 is fixedly connected to the cleaning assembly 10 away from the second hydraulic cylinder 8. The upper surface of the base plate 1 is fixedly connected to the sprayer 19 near the front edge. The nozzle of the sprayer 19 is horizontally perpendicular to the axis of the second ventilation pipe 11 and the first ventilation pipe 702. The angle of rotation of the first servo motor 3 is the same each time.

[0036] The material receiving assembly 7 includes a first air pump 701, a first ventilation pipe 702, a first internal expansion pneumatic clamp 703, a support plate 704, a fixed shaft 705, a rotating rod 706, an infrared thermometer 707, and a warning light 708. The first air pump 701 is fixedly connected to the upper surface of the rotating disk 4, the first ventilation pipe 702 is fixedly connected to the output end of the first air pump 701, and the first internal expansion pneumatic clamp 703 is fixedly connected to the first ventilation pipe 702.

[0037] The cleaning assembly 10 includes a connecting plate 1001, a cleaning sponge 1002, a water-absorbing sponge 1003, and a hot air blower 1004. The connecting plate 1001 is fixedly connected to the end of the second piston rod 9 away from the second hydraulic cylinder 8. The cleaning sponge 1002 is fixedly connected to the lower surface of the connecting plate 1001 near the second hydraulic cylinder 8. The water-absorbing sponge 1003 is fixedly connected to the lower surface of the connecting plate 1001. The water-absorbing sponge 1003 is between the cleaning sponge 1002 and the hot air blower 1004. The hot air blower 1004 is fixedly connected to the lower surface of the connecting plate 1001 away from the second hydraulic cylinder 8. The bottom of the cleaning sponge 1002 and the water-absorbing sponge 1003 is provided with a groove close to the shape of the valve body.

[0038] The support plate 704 is fixedly connected to the upper surface of the first air pump 701, the fixed shaft 705 is fixedly connected to the side surface of the support plate 704, the warning light 708 is fixedly connected to the upper surface of the support plate 704, the rotating rod 706 is rotatably connected to the cylindrical surface of the fixed shaft 705, and the infrared thermometer 707 is fixedly connected to the side surface of the rotating rod 706. The infrared thermometer 707 is connected to the warning light 708 via a data cable. When the measuring point of the infrared thermometer 707 is not aligned with the valve body, it is necessary to adjust the angle of the rotating rod 706 to ensure that the measuring point of the infrared thermometer 707 is aligned with the valve body to measure its temperature. The warning light 708 receives temperature data from the infrared thermometer 707. When the temperature data transmitted by the infrared thermometer 707 is greater than the safe temperature, the warning light 708 lights up red. When the temperature data transmitted by the infrared thermometer 707 is lower than the safe temperature, the warning light 708 lights up green. The valve body can be removed only when the warning light 708 lights up green.

[0039] The upper surface of the base plate 1 is fixedly connected to the third hydraulic cylinder 17 near the right edge, the output end of the third hydraulic cylinder 17 is fixedly connected to the third piston rod 18, and the third piston rod 18 is fixedly connected to the second movable base 16 away from the third hydraulic cylinder 17. A T-shaped connecting block stuck in the T-slot is provided at the bottom of the second movable base 16, and the upper surface of the second movable base 16 is fixedly connected to the second servo motor 15, the output end of the second servo motor 15 is fixedly connected to the second rotating shaft 14, the second rotating shaft 14 is fixedly connected to the placement plate 13 away from the second servo motor 15, the placement plate 13 is fixedly connected to the second air pump 12 away from the second rotating shaft 14, the output end of the second air pump 12 is fixedly connected to the second ventilation pipe 11, and the second ventilation pipe 11 is fixedly connected to the second internal expansion pneumatic clamp 21 away from the second air pump 12. The second internal expansion pneumatic clamp 21 and the first internal expansion pneumatic clamp 703 have the same specifications, and the second ventilation pipe 11 coincides with the axial center line of the first ventilation pipe 702 closest to the second movable base 16.

[0040] A spraying method for a high-temperature wear-resistant valve spraying device comprises the following steps:

[0041] S1. Place the circular hole on the center of the valve body to be sprayed on the second internal expansion pneumatic clamp 21, and start the second air pump 12 to expand the second internal expansion pneumatic clamp 21 to clamp the valve body:

[0042] S2. Start the second hydraulic cylinder 8 to drive the second piston rod 9 to move the cleaning assembly 10 forward until the cleaning assembly 10 completely crosses the valve body axis:

[0043] S3. Start the third hydraulic cylinder 17 to drive the third piston rod 18 to drive the second movable base 16, thereby driving the valve body to move until the valve body reaches the initial spraying position:

[0044] S4. Start the second servo motor 15 to rotate the second rotating shaft 14, thereby rotating the clamped valve body. Then start the second hydraulic cylinder 8 to drive the second piston rod 9 to move the cleaning assembly 10 back to its initial position. In this process, the valve body surface is cleaned:

[0045] S5. Start the sprayer 19 to spray the surface of the valve body, and start the third hydraulic cylinder 17 to drive the third piston rod 18 to move the valve body until the spraying operation is completed, turn off the sprayer 19, the third hydraulic cylinder 17, the second servo motor 15:

[0046] S6. Start the first hydraulic cylinder 5 to drive the first piston rod 6 to move the first movable base 2 toward the second movable base 16 until the first internal expansion pneumatic clamp 703 of the material receiving assembly 7 enters the unclamped end of the internal circular hole of the valve body. Then start the first air pump 701 to expand the first internal expansion pneumatic clamp 703 to clamp the sprayed valve body. Then close the second air pump 12 to reset the second internal expansion pneumatic clamp 21. Then start the first hydraulic cylinder 5 to drive the first movable base 2 back to its original position. At the same time, start the third hydraulic cylinder 17 to drive the second movable base 16 back to its original position.

[0047] S7. Start the first servo motor 3 and drive the rotating disk 4 to rotate a fixed angle via the first rotating shaft 20, so that the next receiving assembly 7 rotates to the position where the previous receiving assembly 7 with the sprayed valve body was located.

[0048] S8. After the temperature of the valve body after spraying drops to a safe range, turn off the first air pump 701 to reset the first inward-expanding pneumatic clamp 703, and then remove the valve body.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature wear-resistant valve spraying device, comprising a base plate (1), characterized in that: A T-shaped slot is provided at the center of the base plate (1); the upper surface of the base plate (1) is fixedly connected to the first hydraulic cylinder (5) near the left edge; the output end of the first hydraulic cylinder (5) is fixedly connected to the first piston rod (6); the first piston rod (6) is fixedly connected to the first movable base (2) away from the first hydraulic cylinder (5); a T-shaped connecting block is provided at the bottom of the first movable base (2) and is stuck in the T-shaped slot; the upper surface of the first movable base (2) is fixedly connected to the first servo motor (3); the output end of the first servo motor (3) is fixedly connected to the first rotating shaft (20); the cylindrical surface of the first rotating shaft (20) is fixedly connected to the rotating disk (4) away from the first servo motor (3); a material receiving assembly (7) is provided on the upper surface of the rotating disk (4); the number of the material receiving assemblies (7) is multiple and is evenly distributed about the axis of the rotating disk (4); the upper surface of the base plate (1) is fixedly connected to the second hydraulic cylinder (8) near the rear edge; the output end of the second hydraulic cylinder (8) is fixedly connected to the second piston rod (9); the second piston rod (9) is fixedly connected to the cleaning assembly (10) away from the second hydraulic cylinder (8).

2. The high-temperature wear-resistant valve spraying device according to claim 1, characterized in that: The material receiving assembly (7) includes a first air pump (701), a first ventilation pipe (702), a first internal expansion pneumatic clamp (703), a support plate (704), a fixed shaft (705), a rotating rod (706), an infrared thermometer (707), and a warning light (708). The first air pump (701) is fixedly connected to the upper surface of the rotating disk (4), the first ventilation pipe (702) is fixedly connected to the output end of the first air pump (701), and the first internal expansion pneumatic clamp (703) is fixedly connected to the first ventilation pipe (702).

3. The high-temperature wear-resistant valve spraying device according to claim 2, characterized in that: The support plate (704) is fixedly connected to the upper surface of the first air pump (701), the fixed shaft (705) is fixedly connected to the side surface of the support plate (704), and the warning light (708) is fixedly connected to the upper surface of the support plate (704).

4. The high-temperature wear-resistant valve spraying device according to claim 2, characterized in that: The rotating rod (706) is rotatably connected to the cylindrical surface of the fixed shaft (705), the infrared thermometer (707) is fixedly connected to the side surface of the rotating rod (706), and the infrared thermometer (707) is connected to the warning light (708) via a data line.

5. The high-temperature wear-resistant valve spraying device according to claim 1, characterized in that: The cleaning assembly (10) comprises a connecting plate (1001), a cleaning sponge (1002), a water-absorbing sponge (1003), and a hot air blower (1004); the connecting plate (1001) is fixedly connected to the end of the second piston rod (9) away from the second hydraulic cylinder (8); the cleaning sponge (1002) is fixedly connected to the lower surface of the connecting plate (1001) near the second hydraulic cylinder (8); the water-absorbing sponge (1003) is fixedly connected to the lower surface of the connecting plate (1001); the water-absorbing sponge (1003) is between the cleaning sponge (1002) and the hot air blower (1004); and the hot air blower (1004) is fixedly connected to the lower surface of the connecting plate (1001) away from the second hydraulic cylinder (8).

6. The high-temperature wear-resistant valve spraying device according to claim 1, characterized in that: The upper surface of the base plate (1) is fixedly connected to the third hydraulic cylinder (17) near the right edge, the output end of the third hydraulic cylinder (17) is fixedly connected to the third piston rod (18), and the third piston rod (18) is fixedly connected to the second movable base (16) away from the third hydraulic cylinder (17). A T-shaped connecting block is provided at the bottom of the second movable base (16) and is stuck in the T-shaped groove.

7. The high-temperature wear-resistant valve spraying device according to claim 6, characterized in that: The upper surface of the second movable base (16) is fixedly connected to the second servo motor (15), the output end of the second servo motor (15) is fixedly connected to the second rotating shaft (14), and the second rotating shaft (14) is fixedly connected to the placement plate (13) away from the second servo motor (15).

8. The high-temperature wear-resistant valve spraying device according to claim 7, characterized in that: The placement plate (13) is fixedly connected to the second air pump (12) away from the second rotating shaft (14), the output end of the second air pump (12) is fixedly connected to the second ventilation pipe (11), the second ventilation pipe (11) is fixedly connected to the second internal expansion pneumatic clamp (21) away from the second air pump (12), the second internal expansion pneumatic clamp (21) and the first internal expansion pneumatic clamp (703) have the same specifications, and the axis of the second ventilation pipe (11) coincides with the axis of the first ventilation pipe (702) closest to the second movable base (16).

9.

9. The high-temperature wear-resistant valve spraying device according to claim 1, characterized in that: The upper surface of the bottom plate (1) is fixedly connected to a sprayer (19) near the front edge, and the spray head of the sprayer (19) is horizontally perpendicular to the axis of the second ventilation pipe (11) and the first ventilation pipe (702).

10. The spraying method proposed by the high-temperature wear-resistant valve spraying device according to any one of claims 1 to 9 is characterized in that: The following steps are involved: S1. Place the circular hole on the center side of the valve body to be sprayed on the second internal expansion pneumatic clamp (21), start the second air pump (12) to expand the second internal expansion pneumatic clamp (21) and clamp the valve body: S2. Start the second hydraulic cylinder (8) to drive the second piston rod (9) to move the cleaning assembly (10) forward until the cleaning assembly (10) completely crosses the valve body axis: S3. Start the third hydraulic cylinder (17) to drive the third piston rod (18) to drive the second movable base (16), thereby driving the valve body to move until the valve body reaches the initial spraying position: S4. Start the second servo motor (15) to drive the second rotating shaft (14) to rotate, thereby driving the clamped valve body to rotate, and then start the second hydraulic cylinder (8) to drive the second piston rod (9) to drive the cleaning assembly (10) to move back to the initial position, completing the cleaning of the valve body surface in this process: S5. Start the spraying machine (19) to spray the surface of the valve body, and at the same time start the third hydraulic cylinder (17) to drive the third piston rod (18) to move the valve body until the spraying operation is completed, and then turn off the spraying machine (19), the third hydraulic cylinder (17), and the second servo motor (15): S6. Start the first hydraulic cylinder (5) to drive the first piston rod (6) to drive the first movable base (2) to move in the direction of the second movable base (16) until the first internal expansion pneumatic clamp (703) of the material receiving assembly (7) enters the end of the circular hole inside the valve body that is not clamped, then start the first air pump (701) to expand the first internal expansion pneumatic clamp (703) to clamp the valve body after spraying, then close the second air pump (12) to reset the second internal expansion pneumatic clamp (21), then start the first hydraulic cylinder (5) to drive the first movable base (2) back to its original position, and at the same time start the third hydraulic cylinder (17) to drive the second movable base (16) back to its original position: S7. Start the first servo motor (3) to drive the rotating disk (4) to rotate a fixed angle via the first rotating shaft (20), so that the next receiving assembly (7) rotates to the position where the previous receiving assembly (7) holding the sprayed valve body was located. S8. After the temperature of the valve body after spraying drops to a safe range, the first air pump (701) is turned off to reset the first inward-expanding pneumatic clamp (703), and then the valve body is removed.

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