A ball valve spraying device and spraying process thereof

Abstract

The present invention discloses a ball valve spraying device and a spraying process thereof, which relates to the field of ball valve spraying technology, including a base, a spherical valve core sprayed by a spray gun, a spherical valve core clamped by a clamping mechanism, and a spray gun displaced by a moving mechanism. The present invention provides a clamping mechanism and a moving mechanism, wherein a rotating column rotates to drive a clamping block to displace the spherical valve core to clamp the spherical valve core, a fourth motor rotates to drive the spherical valve core to rotate, a third motor rotates to adjust the distance between the spray gun and the surface of the spherical valve core, the spray gun sprays the surface of the spherical valve core, and the second motor rotates to drive the spray gun to perform a circumferential displacement, thereby maintaining the distance between the spray gun and the spherical valve core, facilitating the spraying operation on the surface of the spherical valve core. When one spherical valve core is sprayed, the spherical valve core can be disassembled and assembled at the clamping block position on the other side. After spraying is completed, the spray gun moves to the other side for spraying, thereby improving the spraying efficiency of the spherical valve core.

Description

Technical Field

[0001] The invention relates to the technical field of ball valve spraying, in particular to a ball valve spraying device and a spraying process thereof. Background Art

[0002] A ball valve is a valve in which the opening and closing element (the ball) is driven by a valve stem and rotates about its axis. It can also be used to regulate and control fluids. The ball, a key component of a ball valve, is typically made of a metal material with excellent mechanical properties, such as stainless steel, which provides excellent corrosion and wear resistance. However, in actual use, the surface of the spherical valve core is still susceptible to external factors such as high temperature, high pressure, and corrosive liquids. Without proper protective measures, the surface of the spherical valve core will corrode and oxidize, resulting in performance degradation. Therefore, spraying a protective layer as an effective means of protecting the spherical valve core is an essential step in valve core preparation. The spraying material forms a hard protective layer on the spherical valve core, effectively preventing corrosion and wear on the surface. For example, supersonic spraying is used to meet the high wear resistance requirements of spheres. The powder particle speed is supersonic, and the coating has a high density. Plasma spraying is suitable for valve bodies with complex curved surfaces and has strong temperature controllability. Thermal zinc spraying is used for valve body corrosion protection. It generally uses an oxygen-acetylene flame to melt the zinc wire and compressed air atomization spray.

[0003] However, when spraying the spherical valve core, a person needs to manually hold a spray gun and spray the spherical valve core circumferentially. Manual spraying is prone to quality problems such as uneven spraying. In order to facilitate the spraying of the spherical valve core, a ball valve spraying device and a spraying process thereof are provided. Summary of the Invention

[0004] The object of the present invention is to provide a ball valve spraying device and a spraying process thereof in order to facilitate the spraying of a spherical valve core.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a ball valve spraying device, comprising a base, a spherical valve core is sprayed by a spray gun, and the spherical valve core is clamped by a clamping mechanism, and the spray gun is displaced by a moving mechanism, and the clamping mechanism includes a side plate, the side plates are symmetrically fixedly connected to the top of the base, and a mounting bracket is fixedly connected between the two side plates, and the top of the mounting bracket is provided with two groups of symmetrically arranged connecting grooves, the inner wall of the connecting groove is slidably connected to the connecting plate, the connecting plate is rotatably connected to a square rod, one end of the square rod is fixedly connected to a clamping block, the interior of the mounting bracket is rotatably connected to a first threaded rod passing through the connecting plate, one end of the first threaded rod is fixedly connected to a first bevel gear, the interior of the mounting bracket is located at the outer wall of the first bevel gear and is rotatably connected to a second bevel gear, and the top of the second bevel gear is fixedly connected to a rotating column.

[0006] As a further solution of the present invention: the moving mechanism includes a movable groove, which is opened at the top of the base and located below the mounting bracket, the inner wall of the movable groove is slidably connected to a movable seat, a first motor is installed on one side of the base, the output end of the first motor is connected to a second threaded rod, the second threaded rod passes through the movable seat, and a second motor is installed inside the movable seat, the top of the movable seat is rotatably connected to a rotating rod, the output end of the second motor is connected to the rotating rod, the top of the rotating rod is opened with a displacement groove, the inner wall of the displacement groove is slidably connected to the displacement rod, the spray gun is fixedly connected to the top of the displacement rod, and a third motor is installed at one end of the rotating rod, the output end of the third motor is connected to a third threaded rod, and the third threaded rod passes through the displacement rod.

[0007] As a further solution of the present invention: the moving mechanism also includes a fourth motor, the fourth motor is installed inside the movable seat, the output end of the fourth motor is connected to the first spur gear, the interior of the movable seat is located at the outer wall of the first spur gear and is rotatably connected to the second spur gear, the inner wall of the second spur gear is fixedly connected to the connecting shaft, both ends of the connecting shaft are symmetrically fixedly connected to the first docking block, the two sides of the movable groove are symmetrically rotatably connected to the second docking block, one end of the second docking block is fixedly connected to the third bevel gear through a connecting rod, the interior of the base is located at the outer wall of the third bevel gear and is rotatably connected to the fourth bevel gear, the top of the fourth bevel gear is fixedly connected to the rotating shaft, the top of the rotating shaft is fixedly connected to the fifth bevel gear, the interior of the side plate is located at the outer wall of the fifth bevel gear and is rotatably connected to the sixth bevel gear, and the square rod passes through the sixth bevel gear.

[0008] As a further solution of the present invention: the inner wall of the connecting groove is in contact with the outer wall of the connecting plate, and the second bevel gear is meshed with the first bevel gear.

[0009] As a further solution of the present invention: a first threaded hole is provided on the outer wall of the connecting plate, and external threads are symmetrically provided on the outer wall of the first threaded rod, and the external threads match the first threaded hole.

[0010] As a further solution of the present invention: the inner wall of the movable groove fits with the outer wall of the movable seat, the outer wall of the movable seat is provided with a second threaded hole, and the second threaded hole matches the second threaded rod.

[0011] As a further solution of the present invention: the inner wall of the displacement groove fits with the outer wall of the displacement rod, the outer wall of the displacement rod is provided with a third threaded hole, and the third threaded hole matches the third threaded rod.

[0012] As a further solution of the present invention: the first spur gear is meshed with the second spur gear, and the outer walls of the first docking block and the second docking block are both fixedly connected with clamping blocks.

[0013] As a further solution of the present invention: the third bevel gear is engaged with the fourth bevel gear, the fifth bevel gear is engaged with the sixth bevel gear, the outer wall of the sixth bevel gear is provided with a square groove, and the inner wall of the square groove is in contact with the outer wall of the square rod.

[0014] A ball valve spraying process includes the following steps:

[0015] Step 1: Surface cleaning; thoroughly remove welding residues to avoid affecting the coating adhesion; remove oil, rust and impurities on the surface of the spherical valve core, and clean it with common organic solvents or alkaline detergents;

[0016] Step 2: Sandblasting: Use quartz sand or brown corundum abrasive for sandblasting. Spraying should be done within 4-24 hours after treatment to prevent rust.

[0017] Step 3: Spraying: Block the holes in the non-clamping parts, and then spray the spherical valve core through the spraying device;

[0018] Step 4: Post-processing: After the coating surface is dry, polish the surface to meet the sealing surface finish requirements.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By setting a clamping mechanism and a moving mechanism, the rotation of the rotating column drives the displacement of the clamping block to clamp the spherical valve core, and the operation of the fourth motor drives the spherical valve core to rotate; the operation of the third motor adjusts the distance between the spray gun and the surface of the spherical valve core; the spray gun sprays the surface of the spherical valve core, and the operation of the second motor drives the spray gun to perform circumferential displacement, thereby keeping the distance between the spray gun and the spherical valve core constant during the spraying process, which is convenient for equidistant and uniform spraying operations on the surface of the spherical valve core, and when spraying one spherical valve core, the spherical valve core can be disassembled and assembled at the clamping block position on the other side. After spraying is completed, the spray gun moves to the other side for spraying, thereby improving the spraying efficiency of the spherical valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 is a schematic diagram of the internal structure of the mounting frame of the present invention;

[0023] Figure 3 Schematic diagram of the internal structure of the connecting plate of the present invention;

[0024] Figure 4 Schematic diagram of the internal structure of the base of the present invention;

[0025] Figure 5 It is a schematic diagram of the internal structure of the movable seat of the present invention;

[0026] Figure 6 Schematic diagram of the internal structure of the rotating rod of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation of the second docking block of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the square rod of the present invention;

[0029] Figure 9 It is a structural schematic diagram of the first docking block and the second docking block of the present invention.

[0030] In the figure: 1, base; 2, spray gun; 3, clamping mechanism; 301, side plate; 302, mounting frame; 303, connecting groove; 304, connecting plate; 305, square rod; 306, clamping block; 307, first threaded rod; 308, first bevel gear; 309, second bevel gear; 310, rotating column; 4, moving mechanism; 401, movable groove; 402, movable seat; 403, first motor; 404, second threaded rod; 405, second motor; 40 6. Rotating rod; 407. Displacement slot; 408. Displacement rod; 409. Third motor; 410. Third threaded rod; 411. Fourth motor; 412. First spur gear; 413. Second spur gear; 414. Connecting shaft; 415. First docking block; 416. Second docking block; 417. Third bevel gear; 418. Fourth bevel gear; 419. Rotating shaft; 420. Fifth bevel gear; 421. Sixth bevel gear; 5. Square slot; 6. Block. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0033] See also Figures 1 to 9 In an embodiment of the present invention, a ball valve spraying device includes a base 1, a spherical valve core is sprayed by a spray gun 2, the spherical valve core is clamped by a clamping mechanism 3, and the spray gun 2 is displaced by a moving mechanism 4. The clamping mechanism 3 includes a side plate 301, and the side plates 301 are symmetrically fixedly connected to the top of the base 1. A mounting frame 302 is fixedly connected between the two side plates 301. The top of the mounting frame 302 is provided with two sets of symmetrically arranged connecting grooves 303, and the inner wall of the connecting groove 303 is slidably connected. There is a connecting plate 304, on which a square rod 305 is rotatably connected, one end of the square rod 305 is fixedly connected to a conical clamping block 306, the interior of the mounting frame 302 is rotatably connected to a first threaded rod 307 that passes through the connecting plate 304, one end of the first threaded rod 307 is fixedly connected to a first bevel gear 308, the interior of the mounting frame 302 is rotatably connected to the outer wall of the first bevel gear 308, and the top of the second bevel gear 309 is fixedly connected to a rotating column 310.

[0034] In this embodiment: when clamping the spherical valve core, the spherical valve core is placed between the two clamping blocks 306, and then the rotating column 310 is rotated. The rotation of the rotating column 310 drives the second bevel gear 309 to rotate, and the rotation of the second bevel gear 309 drives the first bevel gear 308 to rotate. The rotation of the first bevel gear 308 drives the first threaded rod 307 to rotate, and the rotation of the first threaded rod 307 drives the two connecting plates 304 to displace in opposite directions. The connecting plate 304 slides in the connecting groove 303. The displacement of the connecting plate 304 drives the square rod 305 to displace, and the displacement of the square rod 305 drives the clamping block 306 to displace. The two clamping blocks 306 are displaced and inserted into the openings on both sides of the spherical valve core to clamp and fix the spherical valve core.

[0035] Please refer to Figures 3 to 9 , the moving mechanism 4 includes a movable slot 401, which is opened at the top of the base 1 and is located below the mounting bracket 302, and the inner wall of the movable slot 401 is slidably connected to the movable seat 402, and a first motor 403 is installed on one side of the base 1, and the output end of the first motor 403 is connected to the second threaded rod 404, and the second threaded rod 404 passes through the movable seat 402, and a second motor 405 is installed inside the movable seat 402, and the top of the movable seat 402 is rotatably connected to the rotating rod 406, and the output end of the second motor 405 is connected to the rotating rod 406, and the top of the rotating rod 406 is provided with a displacement slot 407, and the inner wall of the displacement slot 407 is slidably connected to the displacement rod 408, and the spray gun 2 is fixedly connected to the top of the displacement rod 408, and one end of the rotating rod 406 is installed with a third motor 409, and the output end of the third motor 409 is connected to the third threaded rod 410, and the third threaded rod 410 passes through the displacement rod 408, The fourth motor 411 is installed inside the movable seat 402, and the output end of the fourth motor 411 is connected to the first spur gear 412. The interior of the movable seat 402 is located at the outer wall of the first spur gear 412 and is rotatably connected to the second spur gear 413. The inner wall of the second spur gear 413 is fixedly connected to the connecting shaft 414, and both ends of the connecting shaft 414 are symmetrically fixedly connected to the first docking block 415. The two sides of the movable groove 401 are symmetrically rotatably connected to the second docking block 416. One end of the second docking block 416 is fixedly connected to the third bevel gear 417 through a connecting rod. The interior of the base 1 is located at the outer wall of the third bevel gear 417 and is rotatably connected to the fourth bevel gear 418. The top of the fourth bevel gear 418 is fixedly connected to the rotating shaft 419, and the top of the rotating shaft 419 is fixedly connected to the fifth bevel gear 420. The interior of the side plate 301 is located at the outer wall of the fifth bevel gear 420 and is rotatably connected to the sixth bevel gear 421, and the square rod 305 passes through the sixth bevel gear 421.

[0036] In this embodiment: the first motor 403 is started, the first motor 403 drives the second threaded rod 404 to rotate, the second threaded rod 404 rotates to drive the movable seat 402 to displace, the movable seat 402 slides in the movable groove 401, and the movable seat 402 is displaced through the rotating rod 406 and the displacement rod 408 to drive the spray gun 2 to move laterally; the third motor 409 drives the third threaded rod 410 to rotate, the third threaded rod 410 rotates to drive the displacement rod 408 to displace, the displacement rod 408 slides in the displacement groove 407, and the displacement of the displacement rod 408 drives the spray gun 2 to displace, thereby adjusting the distance between the spray gun 2 and the surface of the spherical valve core; the second motor 405 drives the rotating rod 406 to rotate, and the rotating rod 406 rotates to drive the spray gun 2 to perform circumferential displacement; when the first docking block 415 is docked with the second docking block 416, the fourth motor 411 is driven The rotation drives the first spur gear 412 to rotate, the rotation of the first spur gear 412 drives the second spur gear 413 to rotate, the rotation of the second spur gear 413 drives the connecting shaft 414 to rotate, the rotation of the connecting shaft 414 drives the first docking block 415 to rotate, the rotation of the first docking block 415 drives the second docking block 416 to rotate, the rotation of the second docking block 416 drives the third bevel gear 417 to rotate, the rotation of the third bevel gear 417 drives the fourth bevel gear 418 to rotate, the rotation of the fourth bevel gear 418 drives the rotating shaft 419 to rotate, the rotation of the rotating shaft 419 drives the fifth bevel gear 420 to rotate, the rotation of the fifth bevel gear 420 drives the sixth bevel gear 421 to rotate, the rotation of the sixth bevel gear 421 drives the square rod 305 to rotate, the rotation of the square rod 305 drives the clamping block 306 to rotate, and the rotation of the clamping block 306 drives the spherical valve core to rotate.

[0037] When spraying the spherical valve core, the rotating column 310 is rotated, and the rotating column 310 rotates to drive the clamping block 306 to displace the spherical valve core to clamp the spherical valve core. Then the movable seat 402 is displaced to drive the spray gun 2 to move to one end of the clamped spherical valve core. At this time, the first docking block 415 is docked with the second docking block 416, and the fourth motor 411 is driven to drive the sixth bevel gear 421 to rotate. The sixth bevel gear 421 rotates to drive the square rod 305 and the clamping block 306 to rotate, thereby driving the spherical valve core to rotate; the third motor 409 is operated to adjust the distance between the spray gun 2 and the surface of the spherical valve core; when spraying, the spherical valve core rotates, and the spray gun 2 sprays the surface of the spherical valve core. The second motor 405 is operated to drive the spray gun 2 to perform circumferential displacement, thereby keeping the distance between the spray gun 2 and the spherical valve core constant during the spraying process, so as to facilitate the equidistant and uniform spraying operation on the surface of the spherical valve core. When spraying one spherical valve core, the spherical valve core can be disassembled and assembled at the clamping block 306 on the other side. After spraying is completed, the spray gun 2 moves to the other side for spraying, thereby improving the spraying efficiency of the spherical valve core.

[0038] Please refer to Figures 1 to 3 The inner wall of the connecting groove 303 fits with the outer wall of the connecting plate 304, the second bevel gear 309 meshes with the first bevel gear 308, the outer wall of the connecting plate 304 is provided with a first threaded hole, and the outer wall of the first threaded rod 307 is symmetrically provided with external threads, which match the first threaded hole.

[0039] In this embodiment: rotate the rotating column 310, the rotating column 310 drives the second bevel gear 309 to rotate, the second bevel gear 309 drives the first bevel gear 308 to rotate, the first bevel gear 308 drives the first threaded rod 307 to rotate, the first threaded rod 307 drives the two connecting plates 304 to move in opposite directions, and the connecting plates 304 slide in the connecting grooves 303.

[0040] Please refer to Figures 3 to 9 The inner wall of the movable groove 401 fits with the outer wall of the movable seat 402 , and the outer wall of the movable seat 402 is provided with a second threaded hole, which matches the second threaded rod 404 .

[0041] In this embodiment, the first motor 403 drives the second threaded rod 404 to rotate, and the rotation of the second threaded rod 404 drives the movable seat 402 to move, and the movable seat 402 slides in the movable groove 401.

[0042] Please refer to Figures 3 to 9 The inner wall of the displacement groove 407 fits with the outer wall of the displacement rod 408 , and the outer wall of the displacement rod 408 is provided with a third threaded hole, which matches the third threaded rod 410 .

[0043] In this embodiment, the third motor 409 drives the third threaded rod 410 to rotate, and the rotation of the third threaded rod 410 drives the displacement rod 408 to move, and the displacement rod 408 slides in the displacement groove 407, and the displacement of the displacement rod 408 drives the spray gun 2 to move.

[0044] Please refer to Figures 3 to 9 The first spur gear 412 is meshed with the second spur gear 413 , and the outer walls of the first docking block 415 and the second docking block 416 are fixedly connected with a clamping block 6 .

[0045] In this embodiment: when the first docking block 415 is docked with the second docking block 416, the fourth motor 411 runs to drive the first spur gear 412 to rotate, the first spur gear 412 rotates to drive the second spur gear 413 to rotate, the second spur gear 413 rotates to drive the connecting shaft 414 to rotate, the connecting shaft 414 rotates to drive the first docking block 415 to rotate, the first docking block 415 rotates to drive the second docking block 416 to rotate through the clamping block 6.

[0046] Please refer to Figures 3 to 9 The third bevel gear 417 is meshed with the fourth bevel gear 418 , the fifth bevel gear 420 is meshed with the sixth bevel gear 421 , and the outer wall of the sixth bevel gear 421 is provided with a square groove 5 , and the inner wall of the square groove 5 is in contact with the outer wall of the square rod 305 .

[0047] In this embodiment: the second docking block 416 rotates to drive the third bevel gear 417 to rotate, the third bevel gear 417 rotates to drive the fourth bevel gear 418 to rotate, the fourth bevel gear 418 rotates to drive the rotating shaft 419 to rotate, the rotating shaft 419 rotates to drive the fifth bevel gear 420 to rotate, the fifth bevel gear 420 rotates to drive the sixth bevel gear 421 to rotate, and the sixth bevel gear 421 rotates to drive the square rod 305 to rotate; when the square rod 305 moves laterally, the square rod 305 slides in the square groove 5.

[0048] A ball valve spraying process includes the following steps:

[0049] Step 1: Surface cleaning; Welding residues (such as welding slag) must be thoroughly removed to avoid affecting the coating adhesion; remove oil, rust and impurities on the surface of the spherical valve core, and use common organic solvents or alkaline cleaning agents to clean;

[0050] Step 2: Sandblasting: Use quartz sand or brown corundum abrasive (particle size 0.75-3.0mm) and compressed air pressure ≥ 0.5MPa; the nozzle is 100-300mm away from the substrate and the spray angle is 15°-30°, so that the surface roughness reaches Ra 3.2-6.3μm; spraying should be carried out within 4-24 hours after treatment to prevent rust;

[0051] Step 3: Spraying; seal the holes in the non-clamping parts (such as the threaded connection part of the valve stem), and then spray the spherical valve core through the spraying device;

[0052] Step 4: Post-processing: After the coating surface is dry, polish the connection part to meet the sealing surface finish requirements.

[0053] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ball valve spraying device, comprising a base (1), characterized in that: The spherical valve core is sprayed by a spray gun (2), and the spherical valve core is clamped by a clamping mechanism (3). The spray gun (2) is displaced by a moving mechanism (4). The clamping mechanism (3) includes a side plate (301), and the side plates (301) are symmetrically fixedly connected to the top of the base (1). A mounting frame (302) is fixedly connected between the two side plates (301). The top of the mounting frame (302) is provided with two groups of symmetrically arranged connecting grooves (303). The inner wall of the connecting groove (303) is slidably connected to a connecting plate (304). A square rod (305) is rotatably connected to the connecting plate (304), one end of the square rod (305) is fixedly connected to a clamping block (306), the interior of the mounting frame (302) is rotatably connected to a first threaded rod (307) that passes through the connecting plate (304), one end of the first threaded rod (307) is fixedly connected to a first bevel gear (308), the interior of the mounting frame (302) is rotatably connected to an outer wall of the first bevel gear (308), and the top end of the second bevel gear (309) is fixedly connected to a rotating column (310); The movable mechanism (4) includes a movable groove (401), the movable groove (401) is opened at the top of the base (1) and is located below the mounting frame (302), and the inner wall of the movable groove (401) is slidably connected to a movable seat (402); The moving mechanism (4) further comprises a fourth motor (411), the fourth motor (411) being installed inside the movable seat (402), the output end of the fourth motor (411) being connected to a first spur gear (412), the interior of the movable seat (402) being located on the outer wall of the first spur gear (412) being rotatably connected to a second spur gear (413), the inner wall of the second spur gear (413) being fixedly connected to a connecting shaft (414), both ends of the connecting shaft (414) being symmetrically fixedly connected to first docking blocks (415), and both sides of the movable slot (401) being symmetrically rotatably connected to second docking blocks ( 416), one end of the second docking block (416) is fixedly connected to the third bevel gear (417) through a connecting rod, the interior of the base (1) is located on the outer wall of the third bevel gear (417) and is rotatably connected to the fourth bevel gear (418), the top end of the fourth bevel gear (418) is fixedly connected to the rotating shaft (419), the top end of the rotating shaft (419) is fixedly connected to the fifth bevel gear (420), the interior of the side plate (301) is located on the outer wall of the fifth bevel gear (420) and is rotatably connected to the sixth bevel gear (421), and the square rod (305) passes through the sixth bevel gear (421).

2. A ball valve spraying device according to claim 1, characterized in that: A first motor (403) is installed on one side of the base (1), the output end of the first motor (403) is connected to a second threaded rod (404), the second threaded rod (404) passes through the movable seat (402), a second motor (405) is installed inside the movable seat (402), the top end of the movable seat (402) is rotatably connected to a rotating rod (406), the output end of the second motor (405) is connected to the rotating rod (406), the top end of the rotating rod (406) is provided with a displacement groove (407), the inner wall of the displacement groove (407) is slidably connected to a displacement rod (408), the spray gun (2) is fixedly connected to the top end of the displacement rod (408), one end of the rotating rod (406) is installed with a third motor (409), the output end of the third motor (409) is connected to a third threaded rod (410), and the third threaded rod (410) passes through the displacement rod (408).

3. A ball valve spraying device according to claim 1, characterized in that: The inner wall of the connecting groove (303) is in contact with the outer wall of the connecting plate (304), and the second bevel gear (309) is meshed with the first bevel gear (308).

4. A ball valve spraying device according to claim 1, characterized in that: A first threaded hole is provided on the outer wall of the connecting plate (304), and external threads are symmetrically provided on the outer wall of the first threaded rod (307), and the external threads match the first threaded hole.

5. A ball valve spraying device according to claim 1, characterized in that: The inner wall of the movable groove (401) fits in contact with the outer wall of the movable seat (402), and the outer wall of the movable seat (402) is provided with a second threaded hole, which matches the second threaded rod (404).

6. A ball valve spraying device according to claim 2, characterized in that: The inner wall of the displacement groove (407) fits in contact with the outer wall of the displacement rod (408), and a third threaded hole is provided on the outer wall of the displacement rod (408), and the third threaded hole matches the third threaded rod (410).

7. A ball valve spraying device according to claim 1, characterized in that: The first spur gear (412) is meshed with the second spur gear (413), and the outer walls of the first docking block (415) and the second docking block (416) are both fixedly connected with a clamping block (6).

8. A ball valve spraying device according to claim 1, characterized in that: The third bevel gear (417) is meshed with the fourth bevel gear (418), the fifth bevel gear (420) is meshed with the sixth bevel gear (421), and a square groove (5) is provided on the outer wall of the sixth bevel gear (421), and the inner wall of the square groove (5) is in contact with the outer wall of the square rod (305).

9. The spraying process of a ball valve spraying device according to any one of claims 1 to 8, characterized in that: The following steps are included: Step 1: Surface cleaning; thoroughly remove welding residues to avoid affecting the coating adhesion; remove oil, rust and impurities on the surface of the spherical valve core, and clean it with organic solvents or alkaline detergents; Step 2: Sandblasting: Use quartz sand or brown corundum abrasive for sandblasting. Spraying should be done within 4-24 hours after treatment to prevent rust. Step 3: Spraying: Block the holes in the non-clamping parts, and then spray the spherical valve core through the spraying device; Step 4: Post-processing: After the coating surface is dry, polish the surface to meet the sealing surface finish requirements.

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