Pipe fitting coating equipment and coating process thereof

Abstract

The invention relates to the field of pipe fitting machining, and discloses a pipe fitting coating device and a coating process thereof.The pipe fitting coating device comprises a spraying box, a hanging tool and an overturning assembly are arranged in the spraying box, the hanging tool comprises a hanging rod, a plurality of bearing shafts are fixed to the hanging rod, the two ends of each bearing shaft are sleeved with a first shaft sleeve and a second shaft sleeve respectively, and the first shaft sleeve and the second shaft sleeve are arranged in the spraying box. Hooks are fixed to the first shaft sleeve and the second shaft sleeve respectively, the hooks are connected with a hanging ring in a clamped mode through a stabilizer, and the hanging ring is fixed to a pipe fitting. The pipe fitting is hoisted through the hook and the hoisting ring, and the hoisting ring is arranged at any position of the outer surface of the pipe fitting, so that the common problems that the inner cavity coating is poor in corrosion resistance due to the fact that the hook is hooked in the inner cavity of the pipe fitting, the contact point of the hook has no coating, refinishing paint needs to be used for repairing subsequently, and the sanitary index of the drinking water pipe fitting is not up to the standard due to refinishing paint repairing are solved; and the stabilizer is used for keeping the pipe fitting in a stable state, so that the situation that spraying is not in place and the spraying thickness is not uniform in the spraying process is avoided.

Description

Technical Field

[0001] The present invention relates to the field of pipe fitting processing, and particularly to a pipe fitting coating device and its coating process. Background Art

[0002] Pipe fittings are applied to various pipeline and pipe network system connection fields. A coating needs to be applied on the surface by various coating process methods such as electrostatic spraying, electrostatic powder spraying, electrophoresis, and water-based paint dipping to play a role in decoration and anti-corrosion. The coating process equipment commonly used in the industry now needs to hook the inner cavity of the pipe fitting with the hook of the hanger. The part where the hook contacts the inner cavity of the pipe fitting cannot be coated with the coating and needs to be repaired with repair paint later. On the one hand, it affects the appearance. The most important thing is that the anti-corrosion ability of the coating at the repaired part is low, and this part will quickly rust during the process of the pipeline transporting fluid medium. Especially for drinking water pipelines, there is also a situation where the hygiene index of the coating at the hooking point repaired with repair paint does not meet the standard. And the subsequent rust of the pipe fitting has an adverse impact on the drinking water hygiene index. Moreover, after the pipe fitting is hung on the hanger, it cannot be flipped and moved. During the coating process, the electric field strengths at different parts of the pipe fitting are inconsistent, and the powder or paint mist in the air is easy to accumulate at the static bottom position, resulting in uneven coating, and the inner cavity also needs to be manually supplemented with spraying later, which affects the spraying efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pipe fitting coating device and its coating process that can reduce the hoisting difficulty of bent pipes and make the spraying uniform.

[0004] A pipe fitting coating device of the present invention includes a spraying box. A hanger and a flipping assembly are arranged in the spraying box. The hanger includes a hanging rod. A plurality of bearing shafts are fixed on the hanging rod. First bushings and second bushings are respectively sleeved at both ends of each bearing shaft. The first bushings and the second bushings are respectively fixed with hooks. The hooks are clamped with a sling through a stabilizer. The sling is fixed with the pipe fitting. The stabilizer is used to keep the pipe fitting in a stable state when rotating; The flipping assembly is used to rotate two pipe fittings in different directions so that the inner cavities of the pipe fittings do not overlap. The flipping assembly includes a support rod and a flipping part. The support rod is driven by a driving part to reciprocate horizontally. A plurality of groups of flipping parts are arranged on the support rod. The flipping part includes a connecting rod. One end of the connecting rod is fixed with the support rod, and the other end of the connecting rod is fixed with the middle part of a connecting shaft; A set of rotating components is respectively arranged at both ends of the connecting shaft. One set of the rotating components is located at the top of the first bushing, and the other set of the rotating components is located at the bottom of the second bushing. The rotating component includes a first connecting rod. One end of the first connecting rod is hinged to the connecting shaft, the other end of the first connecting rod is hinged to one end of a first pin shaft, the other end of the first pin shaft is hinged to one end of a second connecting rod, and the other end of the second connecting rod is fixed to a support plate. One of the support plates is clamped with the first bushing, and the other support plate is clamped with the second bushing.

[0005] For a pipe fitting painting equipment of the present invention, the stabilizer includes an arc-shaped limiting block. The bottom surface of the arc-shaped limiting block is lapped with the hook, a limiting groove is opened on the top surface of the arc-shaped limiting block, the limiting groove is clamped with the hanging ring, arc-shaped sliding blocks are fixed on both sides of the arc-shaped limiting block, and the arc-shaped sliding blocks move along an arc-shaped guide groove opened on the outer surface of the hook.

[0006] For a pipe fitting painting equipment of the present invention, the driving part includes a hydraulic cylinder. The hydraulic cylinder is installed on the spraying box, the output end of the hydraulic cylinder is fixed to a guide block, the guide block moves along a guide hole opened on the side wall of the spraying box, and the guide block is fixed to the support rod.

[0007] For a pipe fitting painting equipment of the present invention, an iron block is fixed on each second connecting rod, the iron block is intermittently fixed to an electromagnetic rod, the electromagnetic rod is fixed on the side wall of the spraying box, and the electromagnetic rod is electrically connected to a power supply.

[0008] For a pipe fitting painting equipment of the present invention, a dovetail-shaped block is fixed at the top of the first bushing, and the dovetail-shaped block is also fixed at the bottom of the second bushing. The block is matched with a card slot opened on the support plate.

[0009] For a pipe fitting painting equipment of the present invention, the pipe fitting and the hanging ring are integrally cast, and the hanging ring is located at any position on the outer surface of the pipe fitting.

[0010] For a pipe fitting painting equipment of the present invention, a plurality of threaded holes are opened along the length direction of the hook handle of the hook. The threaded holes are threadedly connected with bolts. The bolts pass through fixing plates, and the fixing plates are fixed on both the first bushing and the second bushing. The end of the bolt is fastened by a nut.

[0011] A pipe fitting painting equipment of the present invention and its painting process include the following steps: S1, perform surface shot blasting treatment on the pipe fitting to remove impurities such as rust, dirt, and oxide scale; S2, add precisely proportioned original paint or powder coating into a paint spraying can or a powder spraying box; S3. Hang the pipe fitting on the hook through the hanging ring, and then convey the fixture with the pipe fittings hung thereon into the spraying box; S4. Start the spraying equipment for the first spraying. Stop spraying after 30 seconds. Start the hydraulic cylinder to make the support rod move horizontally, drive the rotating assembly to move, and make each group of pipe fittings rotate 60 degrees in different directions respectively, so that each group of pipe fittings is in a separated and non-overlapping state. Start the spraying equipment, stop spraying after 30 seconds, and then control the output end of the hydraulic cylinder to reset; S5. Repeat step S4; S6. After the spraying is completed, let it stand for one minute, run the fixture outside the spraying box, and check the spraying effect.

[0012] The differences between a pipe fitting coating equipment and its coating process of the present invention and the prior art are as follows: The pipe fitting coating equipment and its coating process of the present invention hoist the pipe fittings through the hook and the hanging ring. The hanging ring is arranged at any position on the outer surface of the pipe fitting, solving the common problems such as poor anti-corrosion ability of the inner cavity coating caused by the hook hanging on the inner cavity of the pipe fitting, resulting in no coating at the contact point of the hook, and the need for subsequent repair with repair paint, and the unqualified hygiene index of the pipe fitting for drinking water due to the repair with repair paint. The stabilizer is used to keep the pipe fitting in a stable state, avoiding incomplete spraying and uneven spraying thickness during the spraying process.

[0013] The present invention enables two relatively parallel pipe fittings to rotate in different directions by setting the flipping assembly, so that the pipe fittings are in a separated and non-overlapping state, avoiding the problem that the traditional spray head cannot spray the stacked pipe fittings during spraying, and further enabling the inner cavity of the pipe fittings to be evenly sprayed, which can not only improve the spraying efficiency, but also reduce the labor cost and equipment cost.

[0014] By the combined use of the fixture and the flipping assembly, the present invention can reduce the floor area of the spraying box, also reduce the overall degree of manual participation, and improve the automation degree of the production line.

[0015] The following further describes a pipe fitting coating equipment and its coating process of the present invention with reference to the accompanying drawings. Description of the Drawings

[0016] Figure 1 is an axonometric perspective view of a pipe fitting coating equipment; Figure 2 is an axonometric view of the fixture; Figure 3 is a structural schematic diagram of the hook and the hanging ring; Figure 4 is Figure 3 a partial enlarged view of Figure 5 is a structural schematic diagram of the flipping assembly; Figure 6 It is a schematic diagram of the dynamic change of the pipe fitting flipping; Figure 7 It is Figure 6 front view of; Figure 8 It is Figure 4 schematic diagram of the structural change of.

[0017] In the figure: spraying box 1, hanger 2, flipping assembly 3, pipe fitting 10, sliding door 11, collection tank 13; hanging rod 21, bearing shaft 22, first bushing 23, second bushing 24, hook 25, lifting ring 26; driving part 20, flipping part 30, support rod 201, connecting rod 202, connecting shaft 203, hydraulic cylinder 200, guide block 204, guide wheel 205, guide track 206, base 207; stabilizer 4, arc-shaped limit block 40, arc-shaped slider 41, arc-shaped guide groove 42, limit groove 43; rotating assembly 5, first pin shaft 50, first connecting rod 51, second connecting rod 52, support plate 53, card slot 54, clamping block 55, electromagnetic rod 56; threaded hole 81, bolt 82, fixing plate 83, nut 84. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 8 , which specifically includes the following embodiments:

[0020] Embodiment 1: A pipe fitting coating device includes a spraying box 1 and spraying equipment. The spraying equipment is arranged in the spraying box 1. Conventional spraying equipment includes spray nozzles, conveying pipes, paint tanks, and pressurizing drivers, etc. In the present invention, a loop pipeline is arranged in the spraying box 1 and is staggered with the mechanical structure. Multiple spray nozzles are arranged on the pipeline, and the spray nozzles are aligned with the pipe fitting 10. The spray nozzles are distributed along the pipeline roughly horizontally and vertically. Specifically, for example, an elbow has two inner cavity outlets, and aligned spray nozzles are configured at the inner cavity outlets. The other outer surfaces of the elbow are all covered by the spraying areas of other spray nozzles. And a sliding door 11 is opened on the side of the spraying box 1 to facilitate the transportation of the pipe fitting 10 and improve the sealing performance of the entire spraying box 1.

[0021] In order to improve production efficiency and spray multiple pipe fittings 10 at one time, while avoiding the inner cavities of the stacked pipe fittings 10 being unable to be evenly sprayed due to occlusion, a hanger 2 and a flipping assembly 3 are provided in the spraying box 1. The hanger 2 is used to mount multiple pipe fittings 10, and the flipping assembly 3 is used to rotate two of the pipe fittings 10 in different directions so that the inner cavities of the pipe fittings 10 do not overlap, avoiding mutual overlap and preventing the spray head on the same plane from spraying in place. The present invention can avoid setting other spray heads to spray at a deflected angle to ensure that the inner cavities of the overlapping pipe fittings 10 are evenly sprayed, thereby reducing the number of spray heads used.

[0022] Specifically, the hanger 2 includes a hanging rod 21, and a plurality of bearing shafts 22 are fixed on the hanging rod 21. As Figure 2 shown, taking the present invention as an example where three bearing shafts 22 are provided, first shaft sleeves 23 and second shaft sleeves 24 are respectively sleeved at both ends of each bearing shaft 22. The first shaft sleeve 23 and the second shaft sleeve 24 are respectively fixed with hooks 25. A suspension ring 26 is fixed on the pipe fitting 10. The suspension ring 26 is located at any position on the outer surface of the pipe fitting 10 and generally coincides with the spatial position of the center of gravity of the pipe fitting 10. The pipe fitting 10 and the suspension ring 26 of the present invention are integrally cast. After hanging the pipe fitting 10 on the hook 25 through the suspension ring 26, the pipe fitting 10 needs to be horizontally hoisted. To avoid irregular swinging of the pipe fitting 10 during subsequent flipping and being unable to maintain a horizontal state to align with the spray head, resulting in incomplete spraying and uneven spraying thickness, the hook 25 and the suspension ring 26 are clamped by a stabilizer 4. The stabilizer 4 is used to keep the pipe fitting 10 in a stable state when the pipe fitting 10 rotates, and the inner cavity plane of the pipe fitting 10 is perpendicular to the horizontal plane.

[0023] Specifically, the stabilizer 4 includes an arc-shaped limiting block 40. The arc-shaped limiting block 40 is arranged inside the hook 25. The bottom surface of the arc-shaped limiting block 40 is lapped with the hook 25. A limiting groove 43 is opened on the top surface of the arc-shaped limiting block 40. The limiting groove 43 is clamped with the suspension ring 26. Arc-shaped sliders 41 are fixed on both sides of the arc-shaped limiting block 40. The arc-shaped sliders 41 move along arc-shaped guide grooves 42. The arc-shaped guide grooves 42 are opened on the outer surface of the hook 25.

[0024] As Figures 6 to 7 shown, after the pipe fitting 10 of the present invention is hung on the stabilizer 4 of the hook 25 through the suspension ring 26, during subsequent flipping of the pipe fitting 10, the pipe fitting 10 relies on its own gravity to move the arc-shaped limiting block 40 along the arc-shaped guide groove 42. After the two pipe fittings 10 are staggered from each other, the pipe fitting 10 is always in a horizontal state, so that the inner cavities of the overlapping pipe fittings 10 can be covered by the spraying area of the spray head.

[0025] It should be noted that both the first bushing 23 and the second bushing 24 mounted on the bearing shaft 22 are provided with damping structures to prevent the first bushing 23 and the second bushing 24 from rotating due to the gravity generated by the weight of the pipe fitting 10 itself. Common damping mechanisms such as springs can prevent them from rotating due to external ineffective acting forces.

[0026] The flipping assembly 3 includes a support rod 201 and a flipping part 30. The support rod 201 is driven by a driving part 20 to move horizontally back and forth. Multiple groups of flipping parts 30 are arranged on the support rod 201. Taking three groups of flipping parts 30 set in the present invention as an example, the flipping part 30 includes a connecting rod 202. One end of the connecting rod 202 is fixed to the support rod 201, and the other end of the connecting rod 202 is fixed to the middle of a connecting shaft 203. One set of rotating assemblies 5 are respectively arranged at both ends of the connecting shaft 203. The rotating assembly 5 includes a first connecting rod 51. One end of the first connecting rod 51 is hinged to the connecting shaft 203, the other end of the first connecting rod 51 is hinged to one end of a first pin shaft 50, the other end of the first pin shaft 50 is hinged to one end of a second connecting rod 52, and the other end of the second connecting rod 52 is fixed to a support plate 53. One set of the rotating assemblies 5 is located at the top of the first bushing 23, and the other set of the rotating assemblies 5 is located at the bottom of the second bushing 24. One of the support plates 53 is clamped with the first bushing 23, and the other support plate 53 is clamped with the second bushing 24. The specific clamping method is as follows: a dovetail-shaped clamping block 55 is fixed at the top of the first bushing 23, and the dovetail-shaped clamping block 55 is also fixed at the bottom of the second bushing 24. The clamping block 55 is matched with a clamping groove 54 formed on the support plate 53.

[0027] It should be noted that as Figures 1 to 2 and Figure 5 shown, the specific way that one set of the rotating assemblies 5 is located at the top of the first bushing 23 is as follows: in the initial state, that is, before the pipe fitting 10 is flipped, the first connecting rod 51 is inclined from the lower left to the upper right, the second connecting rod 52 is inclined from the upper left to the lower right, the support plate 53 has an opening facing downwards, the support plate 53 is clamped with the clamping block 55 at the top of the first bushing 23, and the first connecting rod 51 and the second connecting rod 52 are roughly in a ∧ shape and located above the first bushing 23. The specific way that the other set of the rotating assemblies 5 is located at the bottom of the second bushing 24 is as follows: in the initial state, that is, before the pipe fitting 10 is flipped, the first connecting rod 51 is inclined from the upper left to the lower right, the second connecting rod 52 is inclined from the lower left to the upper right, the support plate 53 has an opening facing upwards, the support plate 53 is clamped with the clamping block 55 at the bottom of the second bushing 24, and the first connecting rod 51 and the second connecting rod 52 are roughly in a ∨ shape and located below the second bushing 24.

[0028] The above specific manner is the initial motion state maintained by the rotating assembly 5. It is to ensure that when the support rod 201 drives the connecting shaft 203 to reciprocate horizontally, the first link 51 in the first group of rotating assemblies 5 drives the second link 52 to have a tendency to swing clockwise, so that ultimately one pipe fitting 10 rotates clockwise. Furthermore, the first link 51 in the second group of rotating assemblies 5 drives the second link 52 to have a tendency to swing counterclockwise, so that ultimately the other pipe fitting 10 rotates counterclockwise. Therefore, the two pipe fittings 10 can be staggered, so that the originally overlapping inner cavity areas can be covered by the spraying area.

[0029] As a further explanation of this embodiment, the swinging angle of the pipe fitting 10 is preferably 60 degrees, ensuring that the staggered distance between the two pipe fittings 10 enables their respective inner cavity surfaces to be covered by the spraying area of the nozzle. The swinging angle of the pipe fitting 10 and the staggered distance between the two pipe fittings 10 are mainly related to the horizontal moving distance of the support rod 201, the length and diameter of the pipe fitting 10. Therefore, when the length and diameter of the pipe fitting 10 are relatively large, a relatively large horizontal moving distance is required to stagger the two pipe fittings 10. Therefore, in addition to increasing the horizontal moving distance, in order to save space, the present invention can also increase the length of the hook handle of the hook 25. Under the same rotation angle, the longer the hook handle, the greater the staggered distance between the two pipe fittings 10. The specific structure is as follows: Refer to Figure 8 ., a plurality of threaded holes 81 are provided along the length direction of the hook handle of the hook 25. The threaded holes 81 are threadedly connected with bolts 82. The bolts 82 pass through the fixing plates 83. The fixing plates 83 are fixed on both the first shaft sleeve 23 and the second shaft sleeve 24. The ends of the bolts 82 are fastened by nuts 84. By selecting different threaded holes 81, the present invention can use different hook handle lengths, so it is suitable for hoisting and spraying pipe fittings 10 of different sizes.

[0030] As a further explanation of this embodiment, when the fixture 2 is not pushed into the spraying box 1, the first link 51 and the second link 52 in the rotating assembly 5 are in an unconstrained state. To ensure the above motion state and facilitate subsequent clamping, the present invention provides a limiting mechanism. The specific manner is: An iron block is fixed on each second link 52. The iron block is intermittently fixed to the electromagnetic rod 56. The electromagnetic rod 56 is fixed on the side wall of the spraying box 1. The electromagnetic rod 56 is electrically connected to a power source. The present invention utilizes the principle of an electromagnet. After being energized, the electromagnetic rod 56 has magnetic force and adsorbs the iron block, ensuring that the first link 51 and the second link 52 are in a ∧-shaped or ∨-shaped motion state, ensuring the relative position between the fixture 2 and the rotating assembly 5, and ensuring that the clamping is in place. When the pipe fitting 10 needs to be flipped, the power source controls the power-off, so that the electromagnetic rod 56 no longer adsorbs the iron block, thus not hindering the movement of the rotating assembly 5. Among them, the number of electromagnetic rods 56 is the same as the number of second links 52.

[0031] As a further explanation of this embodiment, refer toFigure 5 The driving part 20 includes a hydraulic cylinder 200, the hydraulic cylinder 200 is installed on the spraying box 1, the output end of the hydraulic cylinder 200 is fixed to a guide block 204, the guide block 204 moves along a guide hole formed on the side wall of the spraying box 1, and the guide block 204 is fixed to the support rod 201.

[0032] In the present invention, by controlling the output end of the hydraulic cylinder 200 to drive the guide block 204 to reciprocate horizontally, the support rod 201 reciprocates horizontally, so that the rotating assembly 5 can move, and each group of pipe fittings 10 is separated by a certain angle and then reset.

[0033] As a further explanation of this embodiment, refer to Figures 1 to 2 The hanging rod 21 is fixed to the base 207, two rows of guide wheels 205 are arranged at the bottom of the base 207, the guide wheels 205 can move along the guide track 206, the guide track 206 is fixed to the bottom of the spraying box 1, and a collection groove 13 is arranged between the two groups of guide tracks 206.

[0034] In the present invention, the fixture 2 for hanging the pipe fittings 10 can enter the spraying box 1 through the guide track 206, which has a positioning function, ensures the stability of the docking between the fixture 2 and the rotating assembly 5, is convenient for workers to operate, and is also convenient to move the fixture 2 freely outside the spraying box 1, improving production efficiency. The collection groove 13 is located at the bottom of the spraying box 1, and the dripping paint flows into it, and the collected paint is used for repeated use after filtration.

[0035] The present invention also includes a pipe fitting painting process, which can be applied to various painting processes such as spray painting, electrophoresis, dip painting, fluidized bed, electrostatic powder spraying, etc., and includes the following steps: S1. Perform surface shot peening on the pipe fittings 10 to remove impurities such as grease, dirt, scale, and rust. Use methods such as sandblasting and shot peening to remove rust and scale on the surface of the pipe fittings 10, and wipe the pipe fittings 10 with a degreasing agent or organic solvent. S2. Precisely proportion the primer, topcoat, and thinner, and fully stir the prepared paint or powder coating evenly to ensure consistent performance. Pour the prepared paint or powder coating into the paint spraying tank or powder spraying box in the spraying equipment. S3. Hang the pipe fittings 10 on the hooks 25 through the lifting rings 26 so that each pipe fitting 10 is placed horizontally. Then, convey the fixture 2 full of pipe fittings 10 along the guide track 206 into the spraying box 1. During the conveying process, ensure that the first bushing 23 and the second bushing 24 of each group can be clamped in place with the pallet 53, and close the sliding door 11. S4. Turn on the spraying equipment for the first spraying. Stop spraying after 30 seconds. Control the power supply to cut off the power, rendering the electromagnetic rod 56 ineffective. Then turn on the hydraulic cylinder 200 to make the support rod 201 move horizontally, driving the rotating assembly 5 to move, causing each group of pipe fittings 10 to rotate 60 degrees in different directions respectively, so that each group of pipe fittings 10 is in a separated and non-overlapping state. Turn on the spraying equipment again, stop spraying after 30 seconds, and then control the output end of the hydraulic cylinder 200 to reset. S5. Repeat step S4. S6. After the spraying is completed, let it stand for one minute. Control the power supply to turn on, making the electromagnetic rod 56 have magnetic force to adsorb the second connecting rod 52, ensuring the structural state of the rotating assembly 5. Then convey the hanger 2 outside the spraying box 1, check the spraying effect, and perform manual touch-up painting on those that do not meet the spraying effect.

Claims

1. A pipe coating device, comprising a spray box, characterized in that: A hanger and a flip assembly are provided in the spray box, the hanger includes a hanging rod, a plurality of bearing shafts are fixed on the hanging rod, a first sleeve and a second sleeve are respectively mounted at both ends of each bearing shaft, the first sleeve and the second sleeve are respectively fixed with hooks, the hooks are clamped with the lifting rings through stabilizers, the lifting rings are fixed with the pipe fittings, and the stabilizers are used to keep the pipe fittings in a stable state when rotating; The flip assembly is used to rotate the two pipes in different directions so that the inner cavities of the pipes do not overlap, the flip assembly includes a support rod and a flip part, the support rod is driven by a driving part to move back and forth laterally, a plurality of groups of flip parts are arranged on the support rod, and the flip part includes a connecting rod, one end of the connecting rod is fixed to the support rod, and the other end of the connecting rod is fixed to the middle part of the connecting shaft; A group of rotating components are respectively arranged at both ends of the connecting shaft, wherein one group of the rotating components is located at the top of the first sleeve, and the other group of the rotating components is located at the bottom of the second sleeve, and the rotating components include a first connecting rod, one end of the first connecting rod is hinged to the connecting shaft, the other end of the first connecting rod is hinged to one end of the first pin shaft, the other end of the first pin shaft is hinged to one end of the second connecting rod, and the other end of the second connecting rod is fixed to a support plate, one of the support plates is clamped to the first sleeve, and the other support plate is clamped to the second sleeve.

2. A pipe coating equipment according to claim 1, characterized in that: The stabilizer includes an arc-shaped limit block, the bottom surface of which overlaps the hook, the top surface of which is provided with a limit groove, the limit groove is clamped with the lifting ring, arc-shaped sliders are fixed on both sides of the arc-shaped limit block, the arc-shaped sliders move along the arc-shaped guide grooves, and the arc-shaped guide grooves are provided on the outer surface of the hook.

3. A pipe coating equipment according to claim 2, characterized in that: The driving part comprises a hydraulic cylinder, which is mounted on the spray box. The output end of the hydraulic cylinder is fixed to a guide block, which moves along a guide hole provided on a side wall of the spray box, and the guide block is fixed to the support rod.

4. A pipe coating equipment according to claim 3, characterized in that: An iron block is fixed on each of the second connecting rods. The iron block is intermittently fixed to an electromagnetic rod. The electromagnetic rod is fixed on a side wall of the spray box. The electromagnetic rod is electrically connected to a power source.

5. A pipe coating equipment according to claim 4, characterized in that: A dovetail-shaped clamping block is fixed on the top of the first shaft sleeve, and the dovetail-shaped clamping block is also fixed on the bottom of the second shaft sleeve. The clamping block matches with a clamping slot provided on the supporting plate.

6. A pipe coating equipment according to claim 5, characterized in that: The pipe fitting and the lifting ring are cast in one piece, and the lifting ring is located at any position on the outer surface of the pipe fitting.

7. A pipe coating equipment according to claim 6, characterized in that: The hook handle of the hook has a plurality of threaded holes along its length direction, the threaded holes are threadedly connected with bolts, the bolts pass through a fixing plate, the fixing plates are fixed on the first sleeve and the second sleeve, and the ends of the bolts are fastened by nuts.

8. A pipe coating process, based on the pipe coating equipment according to claim 7, characterized in that: The following steps are involved: S1, performing a surface shot blasting treatment on the pipe fitting to remove rust, dirt, oxide scale and other impurities; S2, adding the original paint or powder coating with accurate proportion into the spray can or powder spray box; S3, hanging the pipe fittings on the hooks through the hanging rings, and then transporting the hanger full of pipe fittings to the spray box; S4, start the spraying equipment to spray for the first time, stop spraying after thirty seconds, start the hydraulic cylinder, make the support rod move horizontally, drive the rotating assembly to move, make each group of pipes rotate 60 degrees in different directions, so that each group of pipes is in a state of being separated and not stacked, start the spraying equipment, stop spraying after thirty seconds, and then control the output end of the hydraulic cylinder to reset; S5, repeat step S4; S6, after the spraying is completed, let it stand for one minute, move the hanger outside the spray box, and check the spraying effect.

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