Powder plasma spraying device for anticorrosive coating of gas pipeline

Abstract

The invention discloses a powder plasma spraying device for an anticorrosive coating of a gas pipeline, and relates to the technical field of spray plating, the powder plasma spraying device comprises a plasma spraying machine, an equipment driving structure is mounted on the outer side of the plasma spraying machine, a gas guide structure is arranged at the bottom of the equipment driving structure, and a supporting structure is mounted on the outer side of the gas guide structure; the air guide structure comprises a second air pump and a second supporting frame, a first annular groove is formed in the top of the second supporting frame, under the action of the airflow belt, a fourth air guide piece, a rubber ring, the second supporting frame and other structures, oxygen around jet flow sprayed out of the discharging end of the plasma spraying machine is extremely little, and particles in the jet flow are prevented from being oxidized in the flying process; and the binding force between particles in jet flow and the gas pipeline and the cohesive force between particles in the coating are guaranteed, the quality of the coating is guaranteed, pores and holes in the coating are reduced, and the compactness of the anti-corrosion coating is improved.

Description

Technical Field

[0001] This invention relates to the field of spray coating technology, specifically to a powder plasma spraying device for anti-corrosion coating of gas pipelines. Background Technology

[0002] Once buried underground, gas pipelines undergo electrochemical reactions with electrolytes in the soil, forming galvanic and electrolytic cells that continuously corrode the metal. Without effective protection, the pipelines can perforate within a few years, causing gas leaks, safety accidents, environmental pollution, and significant economic losses. Anti-corrosion coatings for gas pipelines are a crucial barrier protecting buried or underwater steel pipelines from corrosion by soil, moisture, and chemicals. Their main purpose is to extend pipeline lifespan, prevent leaks, ensure safe gas transmission, and protect the environment. During gas pipeline manufacturing, various methods are used to coat the outer surface of the pipeline with anti-corrosion coatings.

[0003] For example, the present utility model with patent application number 202121441384.2 relates to the field of pipe processing technology, specifically to a vacuum plasma spraying device for pipe surface, including a worktable, a support leg detachably provided at the lower part of the worktable, and support seats detachably provided on the left and right sides of the top of the worktable. Rollers are rotatably connected in the grooves on the front and rear sides of the top of the support seats; baffles, two pairs of baffles are provided on the left and right sides of the top of the worktable and located outside the support seats, a sliding rod is provided between the baffles, a slider is movably connected on the sliding rod, a base plate is provided at the top of the slider, and a support plate is provided at the top of the base plate.

[0004] Taking the aforementioned plasma spraying device as an example, during the application of the plasma spraying device, the installation fixture is designed for easy disassembly of the pipes, which restricts the structural setup around the pipes and makes it impossible to seal the pipes. This causes the plasma spraying device to operate in an atmospheric environment, where the high-speed jet disturbs the surrounding air. The rotation of the pipes themselves also increases the airflow at the processing location, increasing the probability of oxidation of particles in the jet and resulting in a high probability of bubbles and holes in the anti-corrosion coating. Summary of the Invention

[0005] The purpose of this invention is to provide a powder plasma spraying device for anti-corrosion coating of gas pipelines, so as to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a powder plasma spraying device for anti-corrosion coating of gas pipelines, comprising a plasma spraying machine, an equipment driving structure mounted on the outside of the plasma spraying machine, a gas guiding structure provided at the bottom of the equipment driving structure, a support structure mounted on the outside of the gas guiding structure, the gas guiding structure comprising a second air pump and a second support frame, the second support frame having an annular groove at its top, the equipment driving structure comprising a clamping component for controlling the position and orientation of the plasma spraying machine, a fourth gas guiding component provided on the outside of the bottom of the plasma spraying machine, and a fixed component on the outside of the fourth gas guiding component. The second inflatable expansion component is fixedly installed. The bottom of the fourth air guide component has an annular groove two, which corresponds to the first annular groove. A rubber ring is fixedly connected inside the fourth air guide component. The rubber ring is fixedly installed on the outside of the discharge end of the plasma spraying machine. The support structure includes a processing table, a drive motor set on the top of the processing table, an air guide component one fixedly connected to the output end of the drive motor, a support frame one fixedly installed on the outside of the first air guide component, and an inflatable expansion component one fixedly installed on the outside of the support frame one. The first inflatable expansion component one is internally connected to the first air guide component one, and an air supply component is provided on the outside of the first air guide component one.

[0007] Preferably, the bottom of the processing table is provided with a hydraulic cylinder and multiple telescopic rods. The piston ends of the telescopic rods and the hydraulic cylinders are fixedly connected to the bottom of the processing table. Two rails are fixedly installed on the top of the processing table, and a railcar is installed between the two rails. A mounting frame is fixedly connected to the top of the railcar.

[0008] Preferably, the drive motor is fixedly installed on the top of the mounting frame three, and multiple hydraulic cylinders two are provided on both sides of the inflatable expansion member one. The hydraulic cylinders two are fixedly installed on the support frame one, and friction plates are fixedly connected to the piston end of the hydraulic cylinders two. The friction plates are located on the outside of the support frame one, and a gas pipeline is provided on the outside of the inflatable expansion member one.

[0009] Preferably, the top of the processing table is provided with two mounting brackets 1, and two rotating wheels are rotatably sleeved on the outer side of each of the two mounting brackets 1. The mounting bracket 1 on the right side of the air guiding structure is fixedly installed on the top of the processing table, and the bottom of the mounting bracket 1 on the left side of the air guiding structure is fixedly connected to the mounting bracket 2. The bottom of the processing table is fixedly connected to a pneumatic cylinder 1 and a telescopic rod 2, and the piston end of the pneumatic cylinder 1 and the piston end of the telescopic rod 2 are both fixedly connected to the mounting bracket 2.

[0010] Preferably, the air supply assembly includes an air pump 1 fixedly connected to the top of the mounting bracket 3, an air guide pipe 1 fixedly connected to the air outlet of the air pump 1, and an air guide component 2 fixedly connected to the top of the air guide pipe 1. The air guide component 2 is rotatably mounted on the outside of the air guide component 1. The air guide component 2 has multiple air guide grooves 1 inside. The air guide grooves 1 are opened on the outside of the air guide component 1. Two mounting brackets 4 are fixedly connected between the housing of the air pump 1 and the air guide component 2. A solenoid valve 1 is fixedly connected to the air outlet of the air pump 1.

[0011] Preferably, the bottom of the support frame 2 is fixedly connected to an air guide component 3, the top of the air guide component 3 is provided with multiple air guide grooves 2, the bottom of the support frame 2 is provided with an air guide groove 3, the air guide grooves 2 and 3 are internally connected, the bottom of the air guide component 3 is fixedly connected to an electromagnet, and an air guide pipe 2 is fixedly connected between the electromagnet and the air inlet end of the air pump 2. The electromagnet is slidably installed inside the processing table, and the air pump 2 is slidably installed at the bottom of the processing table.

[0012] Preferably, the clamping assembly includes a mounting frame five and two support frames three. A mounting beam is fixedly connected to the outer side of the mounting frame five. Mounting shafts are rotatably passed through both sides of the mounting frame five. The two mounting shafts are fixedly connected to the two support frames three respectively. A brake one is sleeved on the outer side of one of the mounting shafts and is fixedly connected to the mounting frame five. A gear is fixedly sleeved on the outer side of the other mounting shaft. A rack is meshed on the top of the gear. A mounting frame six is ​​fixedly connected to one side of the rack. A pneumatic cylinder two is fixedly connected to the top of the mounting frame five. The piston end of the pneumatic cylinder two is fixedly connected to the mounting frame six.

[0013] Preferably, both support frames three are fixedly connected to air guide four, both support frames three are provided with guide grooves, both guide grooves are provided with support frames five, both support frames five are fixedly connected to plasma spraying machine, support frames four are rotatably installed on the outer side of both support frames five, support frames four are slidably connected to support frames three, and fixed horizontal plates are fixedly connected to the top of the outer side of both support frames three. A pneumatic cylinder three is fixedly connected between the bottom of one fixed horizontal plate and the support frame four on the same side, and a telescopic rod three is fixedly connected between the bottom of the other fixed horizontal plate and the support frame four on the same side.

[0014] Preferably, two fixed short plates are fixedly connected to the side of each of the two support frames away from the plasma spraying machine. A forward and reverse motor is fixedly connected between the two fixed short plates on the front side. The output end of the forward and reverse motor is fixedly connected to the adjacent support frame five. A brake two is fixedly connected between the two fixed short plates on the rear side. The brake two is sleeved on the outside of the adjacent support frame five.

[0015] Preferably, the top of the air guide component four is fixedly connected to the air guide component five, the top of the air guide component five is fixedly connected to the hose, the air guide component four is fixedly provided with the air guide pipe three, one end of the air guide pipe three extends into the interior of the inflation expansion component two, the other end of the air guide pipe three is fixedly connected to the air pump three, the air pump three is fixedly connected to the air inlet end of the air pump three is fixedly connected to the solenoid valve two, and the air pump three is fixedly connected to the adjacent support frame three.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In use, the inert gas supply system supplies nitrogen to the interior of the fourth gas guide component through a hose and the fifth gas guide component. The exhaust velocity of the second annular groove is less than the intake velocity inside the fourth gas guide component, and the second annular groove is aligned with the first annular groove. Therefore, nitrogen flows in the high-speed annular airflow band. The airflow band is located between the discharge end of the plasma spraying machine and the gas guide structure. The rubber ring fixedly connected inside the fourth gas guide component is fixedly installed on the outside of the discharge end of the plasma spraying machine. Therefore, under the action of the airflow band, the fourth gas guide component, the rubber ring, the second support frame, etc., there is very little oxygen around the jet sprayed from the discharge end of the plasma spraying machine. This avoids oxidation of the particles in the jet during flight, ensures the bonding force between the particles in the jet and the gas pipeline and the cohesion between the particles inside the coating, ensures the quality of the coating, reduces pores and voids in the coating, improves the density of the anti-corrosion coating, and ensures the corrosion resistance of the anti-corrosion coating.

[0018] 2. When this application is used, as the supporting structure controls the gas pipeline to slowly rotate to the left, the space between the second and first inflatable expansion components increases. Subsequently, the inert gas supply system is controlled to inject nitrogen into the space between the second and first inflatable expansion components through the hose, the fifth gas guide, the fourth gas guide, and the second annular groove. Although the space between the second and first inflatable expansion components increases, the gas pressure between the second and first inflatable expansion components is slightly higher than the external atmospheric pressure as nitrogen is injected. This controls the oxygen content around the discharge end of the plasma spraying machine, preventing the oxidation of particles in the jet sprayed from the discharge end of the plasma spraying machine and ensuring the quality of the anti-corrosion coating. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of the processing table of the present invention;

[0021] Figure 3 This is a schematic diagram of the processing table of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of mounting bracket three of the present invention;

[0023] Figure 5 This is a cross-sectional view of the support frame of the present invention;

[0024] Figure 6 This is a cross-sectional view of the third air guide component of the present invention;

[0025] Figure 7 This is a schematic diagram of the device drive structure of the present invention;

[0026] Figure 8 for Figure 7 Enlarged view of the structure at point A;

[0027] Figure 9 This is a schematic diagram of the support frame three of the present invention;

[0028] Figure 10 This is a schematic diagram of the rack structure of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of the support frame four of the present invention;

[0030] Figure 12 This is a schematic diagram of the structure of the support frame five of the present invention;

[0031] Figure 13 This is a cross-sectional view of the second inflatable expansion component of the present invention;

[0032] Figure 14 This is a cross-sectional view of the fourth air guide component of the present invention.

[0033] The diagram is labeled as follows: 1. Support structure; 11. Machining table; 12. Telescopic rod one; 13. Hydraulic cylinder one; 14. Mounting frame one; 15. Rotating wheel; 16. Mounting frame two; 17. Pneumatic cylinder one; 18. Telescopic rod two; 19. Track; 110. Track car; 111. Mounting frame three; 112. Drive motor; 113. Air guide component one; 114. Support frame one; 115. Hydraulic cylinder two; 116. Friction plate; 117. Inflatable expansion component one; 118. Air guide groove one; 119. Air guide component two; 120. Air guide pipe one; 121. Air pump one; 122. Mounting frame four; 123. Solenoid valve one; 2. Gas pipeline; 3. Air guide structure; 31. Air pump two; 32. Air guide pipe two; 33. Electromagnet component; 34. Air guide component three; 35. Air guide groove two; 36. Support 37. Support frame 2; 38. Annular groove 1; 4. Air guide groove 3; 5. Equipment drive structure; 6. Mounting frame 5; 7. Mounting shaft; 8. Gear; 9. Rack; 10. Mounting frame 6; 11. Pneumatic cylinder 2; 12. Brake 1; 13. Support frame 3; 14. Air guide component 4; 15. Inflatable expansion component 2; 16. Fixed cross plate; 17. Pneumatic cylinder 3; 18. Telescopic rod 3; 19. Support frame 4; 20. Guide groove; 10. Support frame 5; 21. Fixed short plate; 22. Forward and reverse motor; 23. Brake 2; 24. Air pump 3; 35. Solenoid valve 2; 46. Air guide pipe 3; 47. Annular groove 2; 48. Air guide component 5; 49. Hose; 20. Rubber ring; 10. Mounting beam; 11. Plasma spraying machine. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example: Figures 1-14 As shown, the present invention provides a technical solution for a powder plasma spraying device for anti-corrosion coating of gas pipelines, including a plasma spraying machine 6, an equipment driving structure 4 installed on the outside of the plasma spraying machine 6, a gas guiding structure 3 provided at the bottom of the equipment driving structure 4, a support structure 1 installed on the outside of the gas guiding structure 3, the support structure 1 being used to clamp the gas pipeline 2 and control the gas pipeline 2 to move left and right, and a mounting beam 5 being fixed to the building or supporting equipment, the length of the mounting beam 5 being designed according to the length of the gas pipeline 2.

[0036] The plasma spraying equipment consists of a support structure 1, an air guiding structure 3, and an equipment driving structure 4. Connecting the plasma spraying equipment to a human-machine interface to control its operation is an existing technology and will not be described in detail here.

[0037] The application methods of plasma spraying equipment are as follows:

[0038] Example 1, as Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 9 , Figure 13 and Figure 14 As shown;

[0039] In the support structure 1, the bottom of the processing table 11 is equipped with a hydraulic cylinder 13 and multiple telescopic rods 12. The piston ends of the telescopic rods 12 and the hydraulic cylinder 13 are fixedly connected to the bottom of the processing table 11. Under the action of the hydraulic cylinder 13 and the multiple telescopic rods 12, the processing table 11 can move up and down. Two rails 19 are fixedly installed on the top of the processing table 11. A mounting frame 3 111 is fixedly connected to the top of the railcar 110 installed between the two rails 19. Controlling the railcar 110 to drive the mounting frame 3 111 to move left and right on the top of the processing table 11. A drive motor 112 is fixedly connected to the top of the mounting frame 3 111. The output end of the drive motor 112 is fixedly connected to... A support frame 114 is fixedly installed on the outside of the gas guide component 113. On both sides of the inflation expansion component 117 fixedly installed on the outside of the support frame 114, there are multiple hydraulic cylinders 115. The hydraulic cylinders 115 are fixedly inserted on the support frame 114 and move synchronously with the support frame 114. The friction plate 116 fixedly connected to the piston end of the hydraulic cylinder 115 is located on the outside of the support frame 114. After one end of the gas pipeline 2 is sleeved on the outside of the mounting frame 114, the hydraulic cylinder 115 is controlled to work to push the friction plate 116 to move towards the inner wall of the gas pipeline 2. The multiple friction plates 116 abut against the inside of the gas pipeline 2, so that the support structure 1 clamps and fixes the gas pipeline 2.

[0040] The processing table 11 has two mounting brackets 14 on its top. Each mounting bracket 14 has two rotating wheels 15 rotatably mounted on its outer side. The bottom of the mounting bracket 14 on the left side of the gas guiding structure 3 is fixedly connected to a mounting bracket 16. The bottom of the processing table 11 is fixedly connected to a pneumatic cylinder 17 and a telescopic rod 18. The piston ends of the pneumatic cylinder 17 and the telescopic rod 18 are fixedly connected to the mounting bracket 16, which can control the up and down movement of the mounting bracket 14 on the left side. Before using the gas guiding structure 3 to clamp and fix the gas pipeline 2, the pneumatic cylinder 17 is controlled to move the mounting bracket 16 upward, and the mounting bracket 14 on the left side moves upward. The two rotating wheels 15 fixedly mounted on the outer side of the mounting bracket 14 on the left side support the gas pipeline 2, improving the convenience of positioning the gas pipeline 2 and the gas guiding structure 3.

[0041] Because the top of the support frame 36 in the gas guiding structure 3 has an annular groove 37, and the bottom of the gas guiding component 49 in the equipment drive structure 4 has an annular groove 423, the annular groove 423 corresponds to the annular groove 37. The operation of the support structure 1 causes the gas guiding structure 3 to move upward to adjust the distance between the annular groove 423 and the annular groove 37. Then, the operation of the railcar 110 is controlled, and the right end of the gas guiding structure 3, which is clamped and fixed by the support structure 1, moves through the support frame 36. The gas pipeline 2 is supported by two rotating wheels 15 rotatably connected on the right mounting frame 14. Then, the operation of the pneumatic cylinder 17 is controlled to push the mounting frame 16 downward. The mounting frame 14 and the two rotating wheels 15 on the left side move downward to make way for the movement of the mounting frame 111. When the leftmost end of the gas pipeline 2 enters the interior of the support frame 36, the support structure 1 stops working, completing the positioning of the gas pipeline 2 with the plasma spraying machine 6.

[0042] The plasma spraying machine 6 is controlled to spray an anti-corrosion coating on the outside of the gas pipeline 2. At the same time, the drive motor 112 is controlled to drive the air guide component 113 to rotate. The air guide component 113 drives the support frame 114 to rotate. Under the action of multiple hydraulic cylinders 115 and friction plates 116, the gas pipeline 2 rotates synchronously. The track car 110 is controlled to apply a leftward force to the gas pipeline 2. With the cooperation of the support structure 1 and the plasma spraying machine 6, the anti-corrosion coating work on the outer wall of the gas pipeline 2 is completed. The anti-corrosion coating spraying work on the outer wall of the gas pipeline 2 can be completed efficiently and automatically.

[0043] During the process of spraying the anti-corrosion coating on the outer wall of the gas pipeline 2, the air pump 31, which is slidably installed at the bottom of the processing table 11 in the air guiding structure 3, is controlled to operate. Because the top of the air guiding component 34, which is fixedly connected to the bottom of the support frame 36, has multiple air guiding grooves 35, and the air guiding groove 38 at the bottom of the support frame 36 communicates with the multiple air guiding grooves 35, and the air guiding groove 38 communicates with the interior of the air guiding component 34, and the electromagnet 33, which is fixedly connected to the bottom of the air guiding component 34, is fixedly connected to the air inlet end of the air pump 31 by an air guiding pipe 32, and the electromagnet 33 is slidably installed inside the processing table 11, at this time, the electromagnet 33 is magnetically attracted and fixed to the processing table 11, therefore... Electromagnet 33 moves synchronously with processing table 11. At this time, air pump 2 31 works to draw air from inside air guide groove 38 through air guide pipe 2 32, electromagnet 33, air guide component 34, and air guide groove 2 35. The area of ​​annular groove 1 37 is small. Under the action of annular groove 1 37, a ring-shaped high-speed airflow band is formed at the top of support frame 2 36. The gap between the outer wall of gas pipeline 2 and support frame 2 36 is small. To avoid contact between the anti-corrosion coating on the outside of gas pipeline 2 and support frame 2 36, very little air enters the top of support frame 2 36 through the gap between the outside of gas pipeline 2 and support frame 2 36. The very little air is drawn away by the working air pump 2 31 and will not affect the processing of the anti-corrosion coating.

[0044] The top of the gas guide component 49 is fixedly connected to the top of the gas guide component 5 424, which is also fixedly connected to the top of the gas guide component 424. The hose 425 is connected to an inert gas (nitrogen N2, which is safe and readily available, is used as an example) supply system. During the process of spraying the anti-corrosion coating on the outer wall of the gas pipeline 2, the inert gas supply system supplies nitrogen to the inside of the gas guide component 49 through the hose 425 and the gas guide component 5 424. The exhaust velocity of the annular groove 2 423 is less than the intake velocity inside the gas guide component 49, and the annular groove 2 423 is aligned with the annular groove 1 37. Therefore, the gas flowing in the annular high-speed airflow band is nitrogen. The airflow band is set at... Between the discharge end of the plasma spraying machine 6 and the air guiding structure 3, and with the rubber ring 426 fixedly connected inside the air guiding component 49 on the outside of the discharge end of the plasma spraying machine 6, under the action of the airflow band, the air guiding component 49, the rubber ring 426, the support frame 2 36 and other structures, there is very little oxygen around the jet sprayed from the discharge end of the plasma spraying machine 6, which avoids oxidation of particles in the jet during flight, ensures the bonding force between the particles in the jet and the gas pipeline 2 and the cohesion between particles inside the coating, ensures the quality of the coating, reduces pores and voids in the coating, improves the density of the anti-corrosion coating, and ensures the corrosion resistance of the anti-corrosion coating.

[0045] During the process of spraying the anti-corrosion coating on the outer wall of the gas pipeline 2, the gas pipeline 2, which is clamped and fixed by the support frame 114, multiple hydraulic cylinders 115, and multiple friction plates 116, moves to the left. The right end of the moving gas pipeline 2 is supported by the right mounting frame 14 and two rotating wheels 15. During the stable movement of the gas pipeline 2, the position where the anti-corrosion coating is applied to the gas pipeline 2 is in a suspended state, which avoids damage to the coating on the outside of the gas pipeline 2 that has not been fully solidified due to the need for fixing and clamping the gas pipeline 2. This ensures that the anti-corrosion coating on the outside of the gas pipeline 2 is formed in one go, shortening the processing cycle of the gas pipeline 2. When the gas pipeline 2 is processed to the later stage, the control cylinder 17 pushes the fixed mounting frame 16. The mounting frame 14 and the two rotating wheels 15 on the outside of the mounting frame 14 move upward. The two rotating wheels 15 on the left are a certain distance away from the gas guiding structure 3. The anti-corrosion coating at the contact position between the two rotating wheels 15 on the left and the gas pipeline 2 has had sufficient time to solidify. Therefore, there will be no situation where there is no area on the outside of the gas pipeline 2 that cannot be sprayed due to the clamping and support of the gas pipeline 2.

[0046] Example 2: Figure 1 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 11 and Figure 13 As shown;

[0047] According to the method in Embodiment 1 above, the gas pipeline 2 is clamped and fixed using the support structure 1, and the gas supply assembly set in the support structure 1 is controlled to work. In the gas supply assembly, the gas pump 121 is fixedly installed on the top of the mounting bracket 111. The gas outlet end of the gas pump 121 is fixedly connected to the top of the gas guide pipe 120, and the top end of the gas guide pipe 120 is fixedly connected to the gas guide component 119. The gas guide component 119 is rotatably installed on the outside of the gas guide component 113. The setting of the gas guide component 119 does not affect the rotation of the gas guide component 113. Multiple gas guides are set inside the gas guide component 119. The slots 118 are all located on the outside of the air guide 113. The air guide 2 119 is connected to the inside of the air guide 113 through the air guide slots 118. The inflation expansion 117 is connected to the inside of the air guide 113. Therefore, the air supply component supplies air to the inside of the inflation expansion 117 without affecting the rotation of the air guide 113 and the support frame 114. Two mounting brackets 4 122 are fixedly connected between the housing of the air pump 121 and the air guide 2 119, so that the air guide 2 119 is stably installed on the outside of the air guide 113.

[0048] In the gas supply assembly, the gas pump 121 supplies gas to the inflation expansion component 117. The inflation expansion component 117 expands and contacts the inner wall of the gas pipeline 2. After the gas pump 121 has been working for a period of time, the solenoid valve 123, which is fixedly connected to the gas outlet of the gas pump 121, is closed, and the gas pump 121 stops working. The inflation expansion component 117 remains in an expanded state, and the left end of the inner cavity of the gas pipeline 2 is blocked.

[0049] The control electromagnet 33 stops working, causing the gas guiding structure 3 to move to the right as a whole, providing space for the subsequent support structure 1, gas pipeline 2 and equipment drive structure 4 to work.

[0050] Subsequently, the clamping assembly in the control device drive structure 4 operates. The pneumatic cylinder 46, fixedly connected to the top of the mounting bracket 41, retracts. Mounting shafts 42 are rotatably mounted on both sides of the mounting bracket 41. The two mounting shafts 42 are fixedly connected to two support brackets 48, respectively. An air guide 49 is fixedly connected between the two support brackets 48. The two support brackets 48 and the air guide 49 move synchronously. A brake 47 is fitted onto the outer side of one of the mounting shafts 42, and the brake 47 is fixedly connected to the mounting bracket 41. The other mounting shaft 42... A gear 43 is fixedly mounted on the outer side. A mounting bracket 45 is fixedly connected to one side of the rack 44 meshing with the top of the gear 43. The piston end of the pneumatic cylinder 46 is fixedly connected to the mounting bracket 45. Therefore, the force of the pneumatic cylinder 46 contracting causes the mounting shaft 42 to rotate under the action of the mounting bracket 45, the rack 44 and the gear 43. The two support brackets 48 and the air guide 49 rotate. When the pneumatic cylinder 46 finishes working, the support bracket 48 rotates 90°, and the plasma spraying machine 6 held by the equipment drive structure 4 rotates 90°. The plasma spraying machine 6 is parallel to the horizontal plane.

[0051] Both support frames 3 48 are provided with guide grooves 415. Support frames 5 416, installed inside the guide grooves 415, are fixedly connected to the plasma spraying machine 6. The two support frames 5 416 move synchronously with the plasma spraying machine 6. Support frames 414 are rotatably mounted on the outer sides of both support frames 5 416. Support frames 414 are slidably connected to support frames 3 48. Fixed horizontal plates 411 are fixedly connected to the top outer sides of both support frames 3 48. A pneumatic cylinder 3 412 is fixedly connected between the bottom of one fixed horizontal plate 411 and the support frame 414 on the same side. A telescopic rod 3 4 is fixedly connected between the bottom of the other fixed horizontal plate 411 and the support frame 414 on the same side. 13. Under the action of telescopic rod 3 413 and pneumatic cylinder 3 412, the two support frames 414 can only move up and down relative to support frame 3 48. The plasma spraying machine 6 can move up and down. Two fixed short plates 417 are fixedly connected to the side of the two support frames 414 away from the plasma spraying machine 6. A brake 2 419 is fixedly connected between the two fixed short plates 417 on the rear side. The brake 2 419 is sleeved on the outside of the adjacent support frame 5 416. When the brake 2 419 works to brake the support frame 5 416, the support frame 5 416 cannot rotate inside the support frame 414, and the plasma spraying machine 6 cannot rotate between the two support frames 3 48.

[0052] Furthermore, because a forward and reverse motor 418 is fixedly connected between the two fixed short plates 417 on the front side, and the output end of the forward and reverse motor 418 is fixedly connected to the adjacent support frame 416, when the plasma spraying machine 6 held by the equipment drive structure 4 rotates 90° and the plasma spraying machine 6 is parallel to the horizontal plane, the control cylinder 412 works to drive the support frame 414 fixedly connected at the bottom to move away from the air guide 49, and the plasma spraying machine 6 moves away from the contact with the air guide 49, preparing for the plasma spraying machine 6 to tilt. Then, control brake 419 stops working, control forward and reverse motor 418 to rotate forward, and plasma spraying machine 6 rotates counterclockwise around support frame 416. Since support frame 416 is located on the left side of the front of plasma spraying machine 6, the discharge end of plasma spraying machine 6 is tilted and remains to the left of air guide 49 at this time. When the discharge end of plasma spraying machine 6 is tilted by 60°, forward and reverse motor 418 stops working, brake 419 works, and the position adjustment of plasma spraying machine 6 is completed.

[0053] Subsequently, the control support structure 1 works to push the gas pipeline 2 upward. When the gas pipeline 2 is aligned with the gas guide component 49, the control support structure 1 works to push the gas pipeline 2 to the right and fit it onto the outside of the equipment drive structure 4, the plasma spraying machine 6, and the mounting beam 5. When the support frame 114 approaches the discharge end of the plasma spraying machine 6, the support structure 1 stops working, and the gas pipeline 2 stops working.

[0054] Because a gas guide pipe 422 is fixedly inserted through the gas guide component 49, one end of the gas guide pipe 422 extends into the interior of the inflation expansion component 410, and the other end of the gas guide pipe 422 is fixedly connected to the air pump 420, the air inlet of which is fixedly connected to a solenoid valve 421. The air pump 420 is fixedly connected to the adjacent support frame 48. The relative position between the air pump 420 and the support frame 48 remains unchanged, and they move synchronously. At this time, the air pump 420 is controlled to work to supply air to the interior of the inflation expansion component 410 through the gas guide pipe 422, causing the inflation expansion component 410 to expand. The inflation expansion component 410 expands and contacts the inner wall of the gas pipeline 2. After the air pump 420 works for a period of time, it stops working, and the solenoid valve 421 works to close the air inlet of the air pump 420, so that the inflation expansion component 410 remains in an expanded state. At this time, the left side of the discharge end of the plasma spraying machine 6 is sealed by the cooperation of the inflation expansion component 117 and the support frame 114, and the right side of the discharge end of the plasma spraying machine 6 is sealed by the cooperation of the inflation expansion component 2 410, the air guide component 49 and the rubber ring 426. The plasma spraying machine 6 is controlled to spray the anti-corrosion coating into the gas pipeline 2. During this process, the support structure 1 controls the gas pipeline 2 to slowly rotate and move to the left. Because the internal air pressure of the inflation expansion component 2 410 is limited, the gas pipeline 2 can move smoothly to the left while maintaining the sealing effect, so that the position of the anti-corrosion coating sprayed on the inner wall of the gas pipeline 2 moves to the left and away from the plasma spraying machine 6, so as to avoid damage to the anti-corrosion coating sprayed inside the gas pipeline 2.

[0055] As the supporting structure 1 operates and the gas pipeline 2 slowly rotates to the left, the space between the second inflation expansion component 410 and the first inflation expansion component 117 increases. Subsequently, the inert gas supply system is controlled to inject nitrogen into the space between the second inflation expansion component 410 and the first inflation expansion component 117 through the hose 425, the fifth air guide component 424, the fourth air guide component 49, and the second annular groove 423. Although the space between the second inflation expansion component 410 and the first inflation expansion component 117 increases, the air pressure between the second inflation expansion component 410 and the first inflation expansion component 117 remains slightly higher than the external atmospheric pressure as nitrogen is injected. This controls the oxygen content around the discharge end of the plasma spraying machine 6, preventing the oxidation of particles in the jet sprayed from the discharge end of the plasma spraying machine 6 and ensuring the quality of the anti-corrosion coating.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A powder plasma spraying device for anti-corrosion coating of gas pipelines, comprising a plasma spraying machine (6), characterized in that: The plasma spraying machine (6) is equipped with a device drive structure (4) on its outer side. The device drive structure (4) has an air guide structure (3) at its bottom. The air guide structure (3) has a support structure (1) on its outer side. The air guide structure (3) includes an air pump (31) and a support frame (36). The support frame (36) has an annular groove (37) at its top. The device drive structure (4) includes a clamping component for controlling the position and orientation of the plasma spraying machine (6), an air guide component (49) on the outer side of the bottom of the plasma spraying machine (6), and an inflation expansion component (410) fixedly installed on the outer side of the air guide component (49). The air guide component (49) has an annular groove (423) at its bottom. 423) Corresponding to the annular groove (37), the air guide component four (49) is fixedly connected with a rubber ring (426). The rubber ring (426) is fixedly installed on the outside of the discharge end of the plasma spraying machine (6). The support structure (1) includes a processing table (11), a drive motor (112) set on the top of the processing table (11), an air guide component one (113) fixedly connected to the output end of the drive motor (112), a support frame one (114) fixedly installed on the outside of the air guide component one (113), and an inflation expansion component one (117) fixedly installed on the outside of the support frame one (114). The inflation expansion component one (117) is internally connected to the air guide component one (113). An air supply component is provided on the outside of the air guide component one (113).

2. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 1, characterized in that: The bottom of the processing table (11) is provided with a hydraulic cylinder (13) and multiple telescopic rods (12). The piston ends of the telescopic rods (12) and the hydraulic cylinders (13) are fixedly connected to the bottom of the processing table (11). Two rails (19) are fixedly installed on the top of the processing table (11). A railcar (110) is installed between the two rails (19). A mounting frame (111) is fixedly connected to the top of the railcar (110).

3. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 2, characterized in that: The drive motor (112) is fixedly installed on the top of the mounting frame three (111). Multiple hydraulic cylinders two (115) are provided on both sides of the inflatable expansion component one (117). The hydraulic cylinders two (115) are fixedly installed on the support frame one (114). A friction plate (116) is fixedly connected to the piston end of the hydraulic cylinder two (115). The friction plate (116) is located on the outside of the support frame one (114). A gas pipeline (2) is provided on the outside of the inflatable expansion component one (117).

4. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 1, characterized in that: The processing table (11) is provided with two mounting brackets (14) on the top. Two rotating wheels (15) are rotatably sleeved on the outer side of each of the two mounting brackets (14). The mounting bracket (14) on the right side of the air guiding structure (3) is fixedly installed on the top of the processing table (11). The mounting bracket (16) on the left side of the air guiding structure (3) is fixedly connected to the bottom of the mounting bracket (14). The bottom of the processing table (11) is fixedly connected to a pneumatic cylinder (17) and a telescopic rod (18). The piston end of the pneumatic cylinder (17) and the piston end of the telescopic rod (18) are both fixedly connected to the mounting bracket (16).

5. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 2, characterized in that: The gas supply assembly includes a first air pump (121) fixedly connected to the top of the mounting bracket three (111), a first air guide pipe (120) fixedly connected to the air outlet of the first air pump (121), and a second air guide component (119) fixedly connected to the top of the first air guide pipe (120). The second air guide component (119) is rotatably mounted on the outside of the first air guide component (113). The second air guide component (119) has multiple first air guide grooves (118) inside. The first air guide grooves (118) are opened on the outside of the first air guide component (113). Two fourth mounting brackets (122) are fixedly connected between the outer shell of the first air pump (121) and the second air guide component (119). A first solenoid valve (123) is fixedly connected to the air outlet of the first air pump (121).

6. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 1, characterized in that: The bottom of the support frame 2 (36) is fixedly connected to the air guide component 3 (34). The top of the air guide component 3 (34) is provided with multiple air guide grooves 2 (35). The bottom of the support frame 2 (36) is provided with air guide groove 3 (38). The air guide grooves 2 (35) and air guide groove 3 (38) are internally connected. The bottom of the air guide component 3 (34) is fixedly connected to the electromagnet component (33). The electromagnet component (33) is fixedly connected to the air inlet end of the air pump 2 (31) with the air guide pipe 2 (32). The electromagnet component (33) is slidably installed inside the processing table (11). The air pump 2 (31) is slidably installed at the bottom of the processing table (11).

7. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 1, characterized in that: The clamping assembly includes a mounting frame five (41) and two support frames three (48). A mounting beam (5) is fixedly connected to the outside of the mounting frame five (41). Mounting shafts (42) are rotatably passed through both sides of the mounting frame five (41). The two mounting shafts (42) are fixedly connected to the two support frames three (48) respectively. A brake one (47) is sleeved on the outside of one of the mounting shafts (42). The brake one (47) is fixedly connected to the mounting frame five (41). A gear (43) is fixedly sleeved on the outside of the other mounting shaft (42). A rack (44) meshes with the top of the gear (43). A mounting frame six (45) is fixedly connected to one side of the rack (44). A pneumatic cylinder two (46) is fixedly connected to the top of the mounting frame five (41). The piston end of the pneumatic cylinder two (46) is fixedly connected to the mounting frame six (45).

8. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 7, characterized in that: Both of the support frames three (48) are fixedly connected to the air guide four (49). Both of the support frames three (48) are provided with guide grooves (415). Both of the guide grooves (415) are provided with support frames five (416). Both of the support frames five (416) are fixedly connected to the plasma spraying machine (6). Support frames four (414) are rotatably installed on the outside of both of the support frames five (416). Support frames four (414) are slidably connected to support frames three (48). Fixed horizontal plates (411) are fixedly connected to the top of the outside of both of the support frames three (48). A pneumatic cylinder three (412) is fixedly connected between the bottom of one of the fixed horizontal plates (411) and the support frame four (414) on the same side. A telescopic rod three (413) is fixedly connected between the bottom of the other fixed horizontal plate (411) and the support frame four (414) on the same side.

9. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 8, characterized in that: Two fixed short plates (417) are fixedly connected to the side of each of the two support frames four (414) away from the plasma spraying machine (6). A forward and reverse motor (418) is fixedly connected between the two fixed short plates (417) on the front side. The output end of the forward and reverse motor (418) is fixedly connected to the adjacent support frame five (416). A brake two (419) is fixedly connected between the two fixed short plates (417) on the rear side. The brake two (419) is sleeved on the outside of the adjacent support frame five (416).

10. The powder plasma spraying device for anti-corrosion coating of gas pipelines according to claim 1, characterized in that: The top of the air guide component four (49) is fixedly connected to the air guide component five (424), the top of the air guide component five (424) is fixedly connected to the hose (425), the air guide component four (49) is fixedly connected to the air guide pipe three (422), one end of the air guide pipe three (422) extends into the interior of the inflation expansion component two (410), the other end of the air guide pipe three (422) is fixedly connected to the air pump three (420), the air pump three (420) is fixedly connected to the air inlet end of the air pump three (420) and the air pump three (420) is fixedly connected to the adjacent support frame three (48).

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