A device for the production process of steel-lined polytetrafluoroethylene pipes

Abstract

The invention relates to the technical field of pipeline processing, and discloses a device for a production process of steel-lined polytetrafluoroethylene pipelines, comprising a base plate, wherein a double rotating device is arranged on the upper surface of the base plate, the double rotating device comprises a sun gear, the sun gear is meshingly connected with a planetary gear, the planetary gear is meshingly connected with a planetary frame, a sleeve rod device is arranged on the upper surfaces of the sun gear and the planetary frame, the sleeve rod device comprises an outer layer rod, a first sliding rod is arranged inside the outer layer rod, a second sliding shaft is arranged inside the first sliding rod, the outer layer rod and the first sliding rod are connected through a synchronous rotating device, a swing grinding device is arranged between the first sliding rod and the second sliding shaft, the swing grinding device comprises a track groove, a slider is slidably connected inside the track groove, and the scheme has the beneficial effect of improving the grinding efficiency by swinging back and forth, thereby solving the problem that the existing grinding method is relatively cumbersome and inefficient.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline processing, in particular to a device used in the production process of steel-lined polytetrafluoroethylene pipelines. Background Art

[0002] The production of steel-lined PTFE pipes usually requires grinding and rust removal. In order to increase the service life of the pipes, PTFE sheets are usually installed inside the pipes. This material has many advantages such as corrosion resistance, high temperature resistance, low friction, good flexibility, high insulation and non-stickiness. These characteristics make PTFE pipes widely used in chemical industry, petroleum refining, electronics, electrical, food and other fields.

[0003] PTFE sheets usually need to be pasted on the inner wall of the pipe. A thin layer of vacuum cotton is laid on the surface of the PTFE sheet. After the vacuum cotton is laid, the vacuum tube is arranged and then covered with a vacuum film. Use a vacuum pump to extract the air between the PTFE sheet and the tank body. At the same time, use a gas torch to heat the outer wall of the tank with the PTFE sheet on the inner wall slowly from left to right to ensure uniform heating. The staff inside the tank quickly measures the temperature with an infrared thermometer to control the temperature of the sheet to be appropriate and the heating to be uniform. When the sheet reaches a certain temperature, stop heating so that all the air between the PTFE sheet and the tank body is sucked out. After cooling down, remove the vacuum tube and repeat the above steps to paste the next PTFE sheet.

[0004] However, when grinding the inner wall of the pipe, the grinding equipment in the prior art usually adopts a handheld frame, installs the grinding stone on the handheld frame, drives the handheld frame to rotate by a motor, and then drives the grinding stone to rotate synchronously, and grinds the inner wall of the pipe through this rotation. This grinding method usually requires manual control of the handheld frame, and the length of the handheld frame is limited. Therefore, for longer pipes, auxiliary devices are required to grind them. This grinding method is relatively cumbersome and inefficient; therefore, it does not meet the existing needs. In this regard, we propose a device for the production process of steel-lined polytetrafluoroethylene pipes. Summary of the invention

[0005] The present invention provides a device for a steel-lined polytetrafluoroethylene pipe production process, which has the beneficial effect of improving the grinding efficiency by swinging back and forth, and solves the problem that the existing grinding method mentioned in the above background technology is relatively cumbersome and inefficient.

[0006] The present invention provides the following technical solution: a device for the production process of steel-lined polytetrafluoroethylene pipes, comprising a base plate, the upper surface of which is provided with a double rotation device, the double rotation device comprising a sun gear, the sun gear is meshingly connected with a planetary gear, the planetary gear is meshingly connected with a planetary carrier, and the upper surfaces of the sun gear and the planetary carrier are provided with a sleeve rod device.

[0007] The rod sleeve device includes an outer layer rod, a first sliding rod is arranged inside the outer layer rod, a second sliding shaft is arranged inside the first sliding rod, the outer layer rod and the first sliding rod are connected by a synchronous rotation device, a swing grinding device is arranged between the first sliding rod and the second sliding shaft, the cross-section of the first sliding rod is rectangular, and the cross-sections of the outer layer rod and the second sliding rod are cylindrical.

[0008] The swing polishing device comprises a track groove, in which a slider is slidably connected, the track groove is a groove that swings up and down, the slider is cylindrical, and the top of the slider is hemispherical.

[0009] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, wherein: a driving motor is fixedly connected to the upper surface of the base plate, and the output end of the driving motor is fixedly connected to a sun gear, an annular groove is provided on the lower surface of the planetary frame, a positioning rod is rotatably connected in the annular groove, and the other end of the positioning rod is fixedly connected to the side wall of the base plate, a rotating groove is provided inside the planetary gear, a fixing rod is rotatably connected in the rotating groove, and the other end of the fixing rod is fixedly connected to the upper surface of the base plate, the cross-sections of the annular groove and the rotating groove are T-shaped, and the cross-sections of the fixing rod and the positioning rod are T-shaped.

[0010] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, wherein: a first slide groove is opened in the outer rod, a first sliding rod is slidably connected in the first slide groove, a second slide groove is opened in the first sliding rod, a second sliding shaft is slidably connected in the second slide groove, the first slide groove is a square groove, and the second slide groove is a round groove.

[0011] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, wherein: the upper surface of the sun gear is fixedly connected to a connecting shaft, the other end of the connecting shaft is fixedly connected to the lower surface of the second sliding shaft, the upper surface of the planetary frame is fixedly connected to a telescopic sleeve, a telescopic inner rod is slidably connected inside the telescopic sleeve, and the upper end of the telescopic inner rod is fixedly connected to the lower surface of the outer rod.

[0012] As an optional solution of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, the track groove is opened on the outer wall of the second sliding shaft, a slider is slidably connected in the second sliding shaft, and the slider is fixedly connected to the inner wall of the first sliding rod.

[0013] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, the synchronous rotation device includes a slot opened in the outer rod, a sliding rod is slidably connected in the slot, one end of the sliding rod is fixedly connected to a driving spring, the other end of the driving spring is fixedly connected in the slot, the other end of the sliding rod is inserted in a stage slot, and the stage slot is opened in the outer side wall of the first sliding rod.

[0014] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, the inner diameter adjustment device is provided in the outer layer rod, the inner diameter adjustment device includes an installation slide groove and a connecting slide groove opened in the outer layer rod, the installation slide groove is communicated with the connecting slide groove, a grinding block is slidably connected in the installation slide groove, the bottom end of the grinding block is fixedly connected to a connecting rod, the connecting rod is slidably connected in the connecting slide groove, the bottom of the connecting rod is fixedly connected to a telescopic rod, the telescopic rod is slidably connected in the telescopic groove, the telescopic groove is opened in a No. 1 fixed block, the No. 1 fixed block is fixedly connected to the inner wall of the outer layer rod, and the upper surface of the grinding block is designed with rounded corners.

[0015] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, wherein: a synchronous drive assembly is arranged on the telescopic rod, and the synchronous drive assembly includes a No. 1 mounting block fixedly connected to the side wall of the telescopic rod, a No. 1 rotating shaft is fixedly connected in the No. 1 mounting block, a rotating connecting rod is rotatably connected in the No. 1 rotating shaft, the other end of the rotating connecting rod is rotatably connected in the No. 2 rotating shaft, the No. 2 rotating shaft is fixedly connected in the No. 2 mounting groove, the No. 2 mounting groove is opened in the No. 2 fixed block, and the No. 2 fixed block is fixedly connected to the upper surface of the first sliding rod.

[0016] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, wherein: a water spray assembly is arranged in the first sliding rod, and the water spray assembly includes a water tank fixedly connected to the inner wall of the first sliding rod, a piston plate is slidably connected in the water tank, a piston rod is fixedly connected to the lower surface of the piston plate, and the other end of the piston rod is fixedly connected to the upper surface of the second sliding shaft.

[0017] As an optional scheme of the device for the production process of steel-lined polytetrafluoroethylene pipes described in the present invention, wherein: the water tank is connected to a water inlet pipe and a No. 1 water outlet pipe, the water inlet pipe is arranged in the sleeve rod device, the other end of the No. 1 water outlet pipe is connected to a hose, the other end of the hose is connected to a No. 2 output pipe, the No. 2 output pipe is opened in the outer rod, the water inlet pipe is installed with a water inlet check valve, and the No. 1 water outlet pipe is installed with a water outlet check valve.

[0018] The present invention has the following beneficial effects:

[0019] 1. In the production process of steel-lined polytetrafluoroethylene pipes, due to the design of the transmission ratio of the planetary gear system, the rotation speed of the sun gear is greater than the rotation speed of the planetary carrier. Through this connection, it is effectively guaranteed that the rotation speed of the second sliding shaft is faster than the rotation speed of the outer rod and the first sliding rod. Therefore, the second sliding shaft rotates relative to the first sliding rod and the outer rod. Through this relative rotation, a driving force is provided for the swing of the swing grinding device. When the second sliding shaft rotates, the track groove opened in the second sliding shaft will rotate synchronously, and a slider is slidably connected in the track groove. The slider is fixedly connected to the inner wall of the first sliding rod. Therefore, through this design, the first sliding rod and the outer rod can be effectively driven to swing synchronously in succession. Through this swing, the grinding block is effectively driven to have the function of swinging back and forth while performing rotational grinding, thereby improving the grinding efficiency.

[0020] 2. The production process of the steel-lined polytetrafluoroethylene pipe is to slide between the outer rod and the first sliding rod, so that the No. 2 fixed block fixedly connected to one end of the first sliding rod slides relative to the No. 1 fixed block. If the gap between the No. 2 fixed block and the No. 1 fixed block is reduced, the rotating connecting rod will drive the telescopic rod to slide outward, thereby driving the connecting rod and the grinding block connected to the telescopic rod to slide outward. This design expands the diameter that can be ground by the grinding block. Conversely, by expanding the gap between the No. 2 fixed block and the No. 1 fixed block, the grinding block can be driven to slide inward, thereby shortening the diameter that can be ground by the grinding block. This design effectively adjusts the grinding diameter of the grinding block so as to adapt to pipes with different inner diameters.

[0021] 3. The production process of the steel-lined polytetrafluoroethylene pipe, due to the design of the swing grinding device, causes a relative displacement between the second sliding shaft and the first sliding rod. This relative displacement can drive the piston rod and the piston plate to slide in the water tank. When the piston rod slides to the left, the water tank is replenished through the water inlet pipe. When the piston plate slides to the right, the piston plate pressurizes the space in the water tank. Since a water inlet check valve is provided in the water inlet pipe, the water in the water tank can only be sprayed out through the No. 1 water outlet pipe, the hose and the No. 2 output pipe, and the No. 1 water outlet pipe is equipped with a water outlet check valve. The one-way valve allows only water to flow out of the No. 1 water outlet pipe. This design ensures that water is sprayed on the grinding area during the grinding process. The spraying of water can reduce the temperature generated by friction in the grinding area. High temperature will increase the wear between the grinding block and the pipe. The service life of the pipe can be extended by cooling with water spray. At the same time, water spraying can lubricate and reduce the friction coefficient, thereby reducing friction loss. At the same time, since the outer rod, the first sliding rod and the second sliding shaft are rotating, the debris generated by grinding on the inner wall of the pipe can be cleaned by spraying water. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 The double rotating device structure of the present invention is shown in FIG. Figure 1 .

[0024] Figure 3 The double rotating device structure of the present invention is shown in FIG. Figure 2 .

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention.

[0026] Figure 5 For the present invention Figure 4 Enlarged structural diagram at A in the middle.

[0027] Figure 6 It is a schematic structural diagram of the oscillating grinding device of the present invention.

[0028] Figure 7 For the present invention Figure 4 Enlarged structural diagram at B in the middle.

[0029] Figure 8 For the present invention Figure 4 Enlarged structural diagram at point C in the middle.

[0030] Fig. 9 For the present invention Figure 4 Enlarged structural diagram at point D in the middle.

[0031] In the figure: 1. bottom plate; 2. double rotating device; 21. driving motor; 22. sun gear; 23. planetary gear; 24. planetary carrier; 25. annular groove; 26. positioning rod; 27. rotating groove; 28. fixing rod; 3. sleeve rod device; 31. outer rod; 32. first slide groove; 33. first sliding rod; 34. second slide groove; 35. second sliding shaft; 36. telescopic sleeve; 37. telescopic inner rod; 38. connecting shaft; 4. swing grinding device; 41. track groove; 42. slider; 5. synchronous rotating device; 51. notch; 52. sliding rod; 53. driving spring; 54. stage slot ; 6. Inner diameter adjustment device; 61. Mounting slide; 62. Connecting slide; 63. Connecting rod; 64. Telescopic rod; 65. Telescopic slot; 66. No. 1 fixed block; 67. Grinding block; 7. Synchronous drive assembly; 71. No. 1 mounting block; 72. No. 1 rotating shaft; 73. Rotating connecting rod; 74. No. 2 rotating shaft; 75. No. 2 mounting slot; 76. No. 2 fixed block; 8. Water spray assembly; 81. Water tank; 82. Piston plate; 83. Piston rod; 84. Water inlet pipe; 85. Water inlet check valve; 86. No. 1 water outlet pipe; 87. Hose; 88. No. 2 output pipe; 89. Water outlet check valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] Example 1: This example is intended to solve the problem that the existing grinding method is relatively cumbersome and inefficient. Please refer to Figures 1 to 9 A device for the production process of steel-lined polytetrafluoroethylene pipes includes a base plate 1, a double rotating device 2 is arranged on the upper surface of the base plate 1, the double rotating device 2 includes a sun gear 22, the sun gear 22 is meshedly connected with a planetary gear 23, the planetary gear 23 is meshedly connected with a planetary carrier 24, and a sleeve rod device 3 is arranged on the upper surfaces of the sun gear 22 and the planetary carrier 24.

[0034] The sleeve rod device 3 includes an outer layer rod 31, a first sliding rod 33 is arranged inside the outer layer rod 31, a second sliding shaft 35 is arranged inside the first sliding rod 33, the outer layer rod 31 and the first sliding rod 33 are connected by a synchronous rotation device 5, and a swing grinding device 4 is arranged between the first sliding rod 33 and the second sliding shaft 35.

[0035] The swing grinding device 4 comprises a track groove 41 , in which a sliding block 42 is slidably connected.

[0036] A driving motor 21 is fixedly connected to the upper surface of the base plate 1, and a sun gear 22 is fixedly connected to the output end of the driving motor 21. An annular groove 25 is provided on the lower surface of the planetary carrier 24, and a positioning rod 26 is rotatably connected in the annular groove 25, and the other end of the positioning rod 26 is fixedly connected to the side wall of the base plate 1. A rotating groove 27 is provided inside the planetary gear 23, and a fixing rod 28 is rotatably connected in the rotating groove 27, and the other end of the fixing rod 28 is fixedly connected to the upper surface of the base plate 1.

[0037] The sun gear 22, the planetary gears 23, and the planetary carrier 24 are connected to form a planetary gear system. The sun gear 22 is connected to the drive motor 21 to increase the power of the entire planetary gear system. The planetary gear 23 is designed with a fixed rod 28 to limit the relative position of the planetary gear 23, so that the planetary gear 23 cannot rotate around the sun gear 22. The design of the rotation groove 27 ensures that the planetary gear 23 can rotate on its own. The planetary carrier 24 is designed with an annular groove 25 and a positioning rod 26 to effectively ensure the relative position of the planetary carrier 24, providing stability for the operation of the planetary gear system. By adjusting the transmission ratio of the planetary gear system, the rotation speed of the sun gear 22 can be greater than the rotation speed of the planetary carrier 24 (the adjustment of the transmission ratio of the planetary gear system is a prior art, so this solution will not describe it).

[0038] A first sliding groove 32 is defined in the outer rod 31 , a first sliding rod 33 is slidably connected in the first sliding groove 32 , a second sliding groove 34 is defined in the first sliding rod 33 , and a second sliding shaft 35 is slidably connected in the second sliding groove 34 .

[0039] The first slide groove 32 and the first sliding rod 33 are designed to be square, which can effectively ensure that the outer rod 31 and the first sliding rod 33 rotate synchronously while ensuring that there is a sliding function between the two. Through the sliding between the two and the design of the inner diameter adjustment device 6, the size of the inner diameter polished by the grinding block 67 can be adjusted. The design of the second slide groove 34 provides operating space for the movement of the swinging grinding device 4.

[0040] The upper surface of the sun gear 22 is fixedly connected to a connecting shaft 38, the other end of the connecting shaft 38 is fixedly connected to the lower surface of the second sliding shaft 35, the upper surface of the planetary carrier 24 is fixedly connected to a telescopic sleeve 36, a telescopic inner rod 37 is slidably connected inside the telescopic sleeve 36, and the upper end of the telescopic inner rod 37 is fixedly connected to the lower surface of the outer rod 31.

[0041] The track groove 41 is formed on the outer wall of the second sliding shaft 35 . A sliding block 42 is slidably connected in the second sliding shaft 35 . The sliding block 42 is fixedly connected to the inner wall of the first sliding rod 33 .

[0042] The connection of the connecting shaft 38 ensures that the rotation of the second sliding shaft 35 is synchronized with the sun gear 22. The connection between the telescopic sleeve 36 and the telescopic inner rod 37 ensures that the rotation of the outer rod 31 and the first sliding rod 33 is synchronized with the planetary carrier 24. At the same time, since the grinding block 67 is arranged on the outer wall of the outer rod 31, and the rotation of the planetary carrier 24 drives the outer rod 31 to rotate, through this transmission, the basic function of the grinding block 67 to grind the pipe wall is effectively guaranteed.

[0043] Due to the design of the transmission ratio of the planetary gear system, the rotation speed of the sun gear 22 is greater than the rotation speed of the planetary carrier 24. Through this connection, it is effectively ensured that the rotation speed of the second sliding shaft 35 is faster than the rotation speed of the outer rod 31 and the first sliding rod 33. Therefore, the second sliding shaft 35 rotates relative to the first sliding rod 33 and the outer rod 31. This relative rotation provides driving force for the swing of the swing grinding device 4.

[0044] When the second sliding shaft 35 rotates, the track groove 41 opened in the second sliding shaft 35 will rotate synchronously, and a slider 42 is slidably connected in the track groove 41, and the slider 42 is fixedly connected to the inner wall of the first sliding rod 33. Therefore, through this design, the first sliding rod 33 and the outer rod 31 can be effectively driven to swing back and forth synchronously. Through this swing, the grinding block 67 can be effectively driven to have the function of swinging back and forth while performing rotational grinding, thereby improving the grinding efficiency.

[0045] Due to the drive of the swing grinding device 4, relative displacement occurs between the first sliding rod 33 and the second sliding shaft 35. The first sliding rod 33 and the outer rod 31 are connected through the synchronous rotation device 5, which ensures that when the first sliding rod 33 slides, the outer rod 31 slides synchronously with the first sliding rod 33. The telescopic design of the telescopic sleeve 36 and the telescopic inner rod 37 is to adapt to the sliding of the first sliding rod 33 and the outer rod 31 relative to the second sliding shaft 35.

[0046] Embodiment 2: This embodiment is intended to promote the solution of the problem that the grinding diameter of the grinding block 67 is fixed and cannot adapt to pipes of different diameters. This embodiment is an explanation based on Embodiment 1. For details, please refer to Figures 1 to 9 The synchronous rotation device 5 includes a slot 51 opened in the outer rod 31, a sliding rod 52 is slidably connected in the slot 51, one end of the sliding rod 52 is fixedly connected to a driving spring 53, the other end of the driving spring 53 is fixedly connected in the slot 51, and the other end of the sliding rod 52 is inserted in the stage slot 54, which is opened on the outer wall of the first sliding rod 33.

[0047] The design of the synchronous rotation device 5 ensures the connection between the outer rod 31 and the first sliding rod 33. Before grinding, the relative position between the outer rod 31 and the first sliding rod 33 is adjusted, and then the diameter that can be ground by the grinding block 67 is adjusted through the inner diameter adjustment device 6 and the synchronous drive assembly 7. The design of the synchronous rotation device 5 ensures the stability of the outer rod 31 and the first sliding rod 33 between the two during rotation.

[0048] Before grinding, the relative positions of the outer rod 31 and the first sliding rod 33 are manually adjusted to drive the inner diameter adjustment device 6 and the synchronous drive assembly 7 to adjust the position of the grinding block 67. During adjustment, the sliding rod 52 located in the outer rod 31 will be pulled out from one of the stage slots 54 and inserted into another stage slot 54. Through this design, the connection between the outer rod 31 and the first sliding rod 33 can be effectively guaranteed to ensure the stability between the two.

[0049] An inner diameter adjustment device 6 is provided inside the outer layer rod 31, and the inner diameter adjustment device 6 includes an installation slide groove 61 and a connecting slide groove 62 which are opened inside the outer layer rod 31. The installation slide groove 61 is connected to the connecting slide groove 62. A grinding block 67 is slidably connected inside the installation slide groove 61. A connecting rod 63 is fixedly connected to the bottom end of the grinding block 67. The connecting rod 63 is slidably connected in the connecting slide groove 62. A telescopic rod 64 is fixedly connected to the bottom of the connecting rod 63. The telescopic rod 64 is slidably connected in the telescopic groove 65. The telescopic groove 65 is opened in a No. 1 fixed block 66. The No. 1 fixed block 66 is fixedly connected to the inner wall of the outer layer rod 31.

[0050] The design of the mounting groove 61 provides a sliding space for the grinding block 67, and the opening of the connecting groove 62 provides support for the sliding of the connecting rod 63. The telescopic rod 64 is inserted into the telescopic groove 65, which effectively limits the sliding direction of the telescopic rod 64 and ensures the stable sliding of the grinding block 67.

[0051] A synchronous drive assembly 7 is provided on the telescopic rod 64, and the synchronous drive assembly 7 includes a No. 1 mounting block 71 fixedly connected to the side wall of the telescopic rod 64, a No. 1 rotating shaft 72 fixedly connected in the No. 1 mounting block 71, a rotating connecting rod 73 rotatably connected in the No. 1 rotating shaft 72, the other end of the rotating connecting rod 73 is rotatably connected in the No. 2 rotating shaft 74, the No. 2 rotating shaft 74 is fixedly connected in the No. 2 mounting groove 75, the No. 2 mounting groove 75 is provided in the No. 2 fixing block 76, and the No. 2 fixing block 76 is fixedly connected to the upper surface of the first sliding rod 33.

[0052] The first rotating shaft 72 and the second rotating shaft 74 are connected to the rotating connecting rod 73, which can effectively convert the sliding of the second fixing block 76 in the horizontal direction into the sliding of the telescopic rod 64 in the vertical direction, thereby improving the stability of the device.

[0053] Through the sliding between the outer rod 31 and the first sliding rod 33, the second fixing block 76 fixedly connected to one end of the first sliding rod 33 slides relative to the first fixing block 66. Figure 8 If the gap between the second fixing block 76 and the first fixing block 66 is reduced, rotating the connecting rod 73 will drive the telescopic rod 64 to slide outward, thereby driving the connecting rod 63 and the grinding block 67 connected to the telescopic rod 64 to slide outward. This design expands the diameter that can be ground by the grinding block 67. Conversely, by expanding the gap between the second fixing block 76 and the first fixing block 66, the grinding block 67 can be driven to slide inward, thereby shortening the diameter that can be ground by the grinding block 67. This design effectively adjusts the grinding diameter of the grinding block 67 so as to adapt to pipes with different inner diameters.

[0054] Example 3: This example is intended to help solve the problem that the friction between the grinding stone and the inner wall of the pipe during grinding may cause the inner wall of the pipe to overheat, thus affecting the grinding effect. This example is an explanation based on Example 2. For details, please refer to Figures 1 to 9 A water spray assembly 8 is provided in the first sliding rod 33, and the water spray assembly 8 includes a water tank 81 fixedly connected to the inner wall of the first sliding rod 33, a piston plate 82 is slidably connected in the water tank 81, a piston rod 83 is fixedly connected to the lower surface of the piston plate 82, and the other end of the piston rod 83 is fixedly connected to the upper surface of the second sliding shaft 35.

[0055] The water tank 81 is connected to a water inlet pipe 84 and a No. 1 water outlet pipe 86. The water inlet pipe 84 is arranged in the sleeve rod device 3. The other end of the No. 1 water outlet pipe 86 is connected to a hose 87. The other end of the hose 87 is connected to a No. 2 output pipe 88. The No. 2 output pipe 88 is opened in the outer rod 31. An inlet check valve 85 is installed in the water inlet pipe 84, and a water outlet check valve 89 is installed in the No. 1 water outlet pipe 86.

[0056] Due to the design of the swing grinding device 4, a relative displacement occurs between the second sliding shaft 35 and the first sliding rod 33, and this relative displacement can drive the piston rod 83 and the piston plate 82 to slide in the water tank 81. Fig. 9 When the piston rod 83 slides to the left, water is replenished in the water tank 81 through the water inlet pipe 84. When the piston plate 82 slides to the right, the piston plate 82 pressurizes the space in the water tank 81. Since a water inlet check valve 85 is provided in the water inlet pipe 84, the water in the water tank 81 can only be sprayed out through the No. 1 water outlet pipe 86, the hose 87 and the No. 2 output pipe 88. A water outlet check valve 89 is installed in the No. 1 water outlet pipe 86, so that the No. 1 water outlet pipe 86 can only discharge water. Through this design, it can be ensured that water is sprayed on the grinding area during the grinding process. The temperature generated by friction in the grinding area can be reduced by spraying water. High temperature will aggravate the wear between the grinding block 67 and the pipeline. The service life of the grinding block 67 and the pipeline can be extended by cooling with water spray. At the same time, water spraying can play a lubricating role, reduce the friction coefficient, and thus reduce friction loss. At the same time, since the outer rod 31, the first sliding rod 33 and the second sliding shaft 35 are rotating, the debris generated by grinding on the inner wall of the pipeline can be cleaned by spraying water.

[0057] The No. 1 water outlet pipe 86 is opened in the second sliding shaft 35, and the No. 2 output pipe 88 is opened in the outer rod 31. There will be a relative displacement between the first sliding rod 33 and the second sliding shaft 35. If the two channels are connected by a hard pipe gap, the first sliding rod 33 and the second sliding shaft 35 will be stuck by the hose 87. Therefore, in order to ensure the sliding between the first sliding rod 33 and the second sliding shaft 35, the hose 87 is usually made of ductile rubber material.

[0058] The following steps are required to paste the polytetrafluoroethylene sheet on the inner wall of the pipe:

[0059] Lay a thin layer of vacuum cotton on the surface of the polytetrafluoroethylene sheet, arrange the vacuum tube after the vacuum cotton is laid, and then cover it with a vacuum film. Use a vacuum pump to extract the air between the polytetrafluoroethylene sheet and the tank body. At the same time, use a gas torch to heat the outer wall of the tank with the polytetrafluoroethylene sheet on the inner wall slowly from left to right to ensure uniform heating. The staff inside the tank quickly measures the temperature with an infrared thermometer to control the temperature of the sheet to be appropriate and the heating to be uniform. When the sheet reaches a certain temperature, stop heating so that all the air between the polytetrafluoroethylene sheet and the tank body is sucked out. After cooling down, remove the vacuum tube and repeat the above steps to paste the next polytetrafluoroethylene sheet.

[0060] The processing of steel-lined polytetrafluoroethylene straight tube push extrusion mainly includes the following processes:

[0061] Pretreatment: Grinding. Grinding can make the lining surface of the pipe smooth without sharp edges and corners, and the outer surface is free of welding slag, spatter and obvious protrusions. Rust removal: Use a long rod to push and pull the steel wire repeatedly in the steel pipe, and finally stand the steel pipe upright to knock off the rust or blow off the rust with compressed air.

[0062] Liner molding: Use tools such as woodworking saws and knives to process one end of the PTFE tube into more than 6 sharp teeth. Pull the PTFE tube slightly larger than the inner diameter of the steel pipe into the steel part through the traction equipment. After the liner is cold-drawn for at least 12 hours, saw off the excess part of one end of the PTFE tube to expose a length suitable for flanging, and trim the end flush. While rotating the workpiece, use a flame to slowly and evenly heat the part of the PTFE tube to be flanging until a small part becomes transparent. Immediately after stopping heating, use a conical die to rotate and squeeze the end of the PTFE tube to turn it outward. Quickly move the workpiece to the screw press, insert the forming die into the end of the PTFE tube, squeeze the press while rotating the die, and cool it with water after squeezing. After the PTFE is cooled and formed, release the press to remove the die, and press the flanging surface with a steel flange and fasteners. Repeat the above operation for the other end of the PTFE tube.

[0063] Post-processing: First, use a bakelite milling machine to trim the plastic sealing surface under the guidance of a flat slide rail to make it flat, parallel to the steel flange plane, and meet the finished product size requirements. Then use a grinder and a blade to trim the polytetrafluoroethylene outside the sealing surface to make the finished product suitable for installation and use. Then paint the inner wall of the pipe. It should be noted that appropriate safety measures should be taken during the spraying process to prevent contamination of polytetrafluoroethylene, and the product should be marked according to product standards by spraying. If there is dirt inside the product or on the sealing surface, wipe it off with water with detergent, and then wipe it dry with a dry rag. If there is paint, use an organic solvent to wipe it off. Finally, protect the sealing surface: plastic cover, woodworking plywood or interconnect flange surfaces of the same specification.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for a steel-lined polytetrafluoroethylene pipe production process, comprising a bottom plate (1), characterized in that: A double rotating device (2) is provided on the upper surface of the bottom plate (1), the double rotating device (2) comprising a sun gear (22), the sun gear (22) being meshingly connected to a planetary gear (23), the planetary gear (23) being meshingly connected to a planetary carrier (24), and a sleeve rod device (3) is provided on the upper surfaces of the sun gear (22) and the planetary carrier (24); The rod sleeve device (3) comprises an outer rod (31), a first sliding rod (33) is arranged inside the outer rod (31), a second sliding shaft (35) is arranged inside the first sliding rod (33), the outer rod (31) and the first sliding rod (33) are connected via a synchronous rotation device (5), and a swing grinding device (4) is arranged between the first sliding rod (33) and the second sliding shaft (35); The swing grinding device (4) comprises a track groove (41), and a sliding block (42) is slidably connected in the track groove (41); A driving motor (21) is fixedly connected to the upper surface of the base plate (1), and an output end of the driving motor (21) is fixedly connected to a sun gear (22); an annular groove (25) is provided on the lower surface of the planetary frame (24), a positioning rod (26) is rotatably connected in the annular groove (25), and the other end of the positioning rod (26) is fixedly connected to the side wall of the base plate (1); a rotating groove (27) is provided inside the planetary gear (23), a fixing rod (28) is rotatably connected in the rotating groove (27), and the other end of the fixing rod (28) is fixedly connected to the upper surface of the base plate (1); The outer rod (31) has a first sliding groove (32) formed in it, a first sliding rod (33) is slidably connected in the first sliding groove (32), a second sliding groove (34) is formed in the first sliding rod (33), and a second sliding shaft (35) is slidably connected in the second sliding groove (34); A connecting shaft (38) is fixedly connected to the upper surface of the sun gear (22), the other end of the connecting shaft (38) is fixedly connected to the lower surface of the second sliding shaft (35), a telescopic sleeve (36) is fixedly connected to the upper surface of the planetary carrier (24), a telescopic inner rod (37) is slidably connected inside the telescopic sleeve (36), and the upper end of the telescopic inner rod (37) is fixedly connected to the lower surface of the outer rod (31); The track groove (41) is formed on the outer wall of the second sliding shaft (35), a sliding block (42) is slidably connected inside the second sliding shaft (35), and the sliding block (42) is fixedly connected to the inner wall of the first sliding rod (33); An inner diameter adjustment device (6) is provided in the outer rod (31), and the inner diameter adjustment device (6) comprises an installation slide groove (61) and a connecting slide groove (62) which are provided in the outer rod (31), the installation slide groove (61) is communicated with the connecting slide groove (62), a grinding block (67) is slidably connected in the installation slide groove (61), a connecting rod (63) is fixedly connected at the bottom end of the grinding block (67), the connecting rod (63) is slidably connected in the connecting slide groove (62), a telescopic rod (64) is fixedly connected at the bottom of the connecting rod (63), the telescopic rod (64) is slidably connected in the telescopic groove (65), the telescopic groove (65) is provided in a No. 1 fixed block (66), and the No. 1 fixed block (66) is fixedly connected to the inner wall of the outer rod (31); Through this design, the grinding block (67) has the function of swinging back and forth while performing rotational grinding.

2. The device for producing steel-lined polytetrafluoroethylene pipes according to claim 1, characterized in that: The synchronous rotation device (5) comprises a notch (51) provided in the outer rod (31), a sliding rod (52) being slidably connected in the notch (51), one end of the sliding rod (52) being fixedly connected to a driving spring (53), the other end of the driving spring (53) being fixedly connected in the notch (51), the other end of the sliding rod (52) being inserted in a stage slot (54), and the stage slot (54) being provided in the outer side wall of the first sliding rod (33).

3. The device for producing steel-lined polytetrafluoroethylene pipes according to claim 1, characterized in that: The telescopic rod (64) is provided with a synchronous drive assembly (7), the synchronous drive assembly (7) comprising a No. 1 mounting block (71) fixedly connected to a side wall of the telescopic rod (64), a No. 1 rotating shaft (72) fixedly connected in the No. 1 mounting block (71), a rotating connecting rod (73) rotatably connected in the No. 1 rotating shaft (72), the other end of the rotating connecting rod (73) rotatably connected in the No. 2 rotating shaft (74), the No. 2 rotating shaft (74) fixedly connected in the No. 2 mounting groove (75), the No. 2 mounting groove (75) being provided in the No. 2 fixing block (76), and the No. 2 fixing block (76) fixedly connected to the upper surface of the first sliding rod (33).

4. The device for producing steel-lined polytetrafluoroethylene pipes according to claim 1, characterized in that: A water spray assembly (8) is arranged inside the first sliding rod (33), and the water spray assembly (8) comprises a water tank (81) fixedly connected to the inner wall of the first sliding rod (33), a piston plate (82) is slidably connected inside the water tank (81), a piston rod (83) is fixedly connected to the lower surface of the piston plate (82), and the other end of the piston rod (83) is fixedly connected to the upper surface of the second sliding shaft (35).

5. The device for producing steel-lined polytetrafluoroethylene pipes according to claim 4, characterized in that: The water tank (81) is connected to a water inlet pipe (84) and a first water outlet pipe (86); the water inlet pipe (84) is arranged in the sleeve rod device (3); the other end of the first water outlet pipe (86) is connected to a hose (87); the other end of the hose (87) is connected to a second output pipe (88); the second output pipe (88) is opened in the outer rod (31); a water inlet check valve (85) is installed in the water inlet pipe (84); and a water outlet check valve (89) is installed in the first water outlet pipe (86).

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