A method for lining PTFE-molded four-way pipes

Abstract

This invention relates to the field of PTFE four-way pipe technology, specifically a method for molding PTFE four-way pipes with PTFE lining. The method includes a lining frame, with PTFE tube supports fixedly connected to its four sides. One end of each PTFE tube support is equipped with an electric push rod. Guide seats are provided on the four sides of the inner wall of the lining frame, and a glue-spreading ring is provided at one end of each guide seat. A four-way pipe body is located at the center of the lining frame. A front adjusting seat is movably connected to the front of the lining frame, and a rear adjusting seat is movably connected to the back of the lining frame. This invention, through the arrangement of the lining frame, PTFE tube support, electric push rod, guide seat, glue-spreading ring, four-way pipe body, front adjusting seat, rear adjusting seat, first air pump, and second air pump, enables the equipment to perform a more suitable positioning and molding operation for the PTFE four-way pipe. In actual use, the operator first places the four-way pipe body to be lined with PTFE on the back of the front adjusting seat.

Description

Technical Field

[0001] This invention relates to the field of PTFE four-way pipe technology, specifically to a method for lining PTFE-molded four-way pipes with PTFE. Background Technology

[0002] Polytetrafluoroethylene (PTFE), also known as Teflon, is commonly called the "King of Plastics." It is a high-molecular polymer made from tetrafluoroethylene monomers. It possesses excellent heat and cold resistance, and is resistant to acids, alkalis, and various organic solvents. It is virtually insoluble in all solvents. PTFE also exhibits high-temperature resistance and has an extremely low coefficient of friction, making it suitable for lubrication and ideal for cleaning the inner lining of water pipes. Pipe fittings are a collective term for components in piping systems that serve functions such as connection, control, direction changing, flow distribution, sealing, and support. PTFE-lined pipes and fittings enjoy the reputation of being the "King of Plastics." With excellent temperature resistance and corrosion resistance, it is an ideal conveying device for highly corrosive media such as nitric acid, sulfuric acid, hydrofluoric acid, phosgene, chlorine, aqua regia, mixed acids, bromides, and other organic solvents. Fluoropolymer-lined valves, also known as fluoroplastic-lined corrosion-resistant valves, are made by molding polytetrafluoroethylene resin onto the inner wall of steel or iron valve pressure-bearing components or the outer surface of valve internals. Utilizing its unique resistance to highly corrosive media, it is used to manufacture various valves and pressure vessels. Four-way pipes are a type of pipe fitting; the pipe diameters can be the same or different. After fluoropolymer lining, they can be used for more durable and stable pipe connections.

[0003] For example, patent document CN 115254544 B discloses an environmentally friendly bonding device for the lining of PTFE-lined pressure pipes. This device includes a pipe, a movable frame, multiple application mechanisms, a transmission mechanism, a drive mechanism, and a fixing mechanism. Each application mechanism includes an expansion block, a guide assembly, an adhesive roller, and a spraying assembly. The spraying assembly is used to spray adhesive onto the adhesive roller. The transmission mechanism includes a drive shaft, a push plate, a movable plate, a first elastic element, and multiple push rods. The fixing mechanism is used to fix the device to one end of the pipe, and the drive mechanism is used to rotate the drive shaft. This invention provides an environmentally friendly bonding device for the lining of PTFE-lined pressure pipes to solve the problem that existing PTFE lining bonding devices often result in uneven application of adhesive, causing sagging and poor adhesion of the PTFE sheet, affecting subsequent use.

[0004] However, in actual use, this structure can only perform simple internal PTFE lining operations. When the equipment is used to lining PTFE four-way pipes, due to its own structural limitations, it cannot perform a quick and easy locking and positioning installation operation to adapt to the PTFE four-way pipes, thus failing to guarantee a more stable PTFE lining molding operation. Furthermore, the equipment cannot perform a more suitable docking operation and feeding operation between the PTFE lining tube and the four-way pipe, and it cannot perform a quick loading and unloading operation for the four-way pipes, affecting the overall efficiency of the equipment in lining four-way pipes and failing to meet daily usage requirements. Therefore, it is urgent to design a method for lining PTFE four-way pipes to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method for lining PTFE four-way pipes using molding, in order to solve the problems mentioned in the background art. In practical use, existing structures often only allow for simple internal lining operations. However, when the equipment is used for lining PTFE four-way pipes, due to structural limitations, it cannot perform a quick and easy locking and positioning installation operation to ensure a stable PTFE lining molding operation. Furthermore, the equipment cannot perform a more suitable docking and feeding operation between the PTFE lining tube and the four-way pipe, and it cannot perform rapid loading and unloading operations for the four-way pipe, affecting the overall efficiency of the equipment in lining four-way pipes and failing to meet daily usage requirements.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for lining a molded PTFE four-way pipe with PTFE, comprising a PTFE lining frame, PTFE pipe supports fixedly connected to the four sides of the PTFE lining frame, an electric push rod provided at one end of the PTFE pipe supports, guide seats provided on the four sides of the inner wall of the PTFE lining frame, a uniform adhesive ring seat provided at one end of the guide seats, a four-way pipe body provided at the inner center of the PTFE lining frame, a front adjusting seat movably connected to the front of the PTFE lining frame, a rear adjusting seat movably connected to the back of the PTFE lining frame, a first air control pump provided on the front of the front adjusting seat, and a second air control pump provided on the back of the rear adjusting seat;

[0007] The U-shaped support is fixedly connected to the bottom end of the fluoropolymer-lined frame. A first support foot is fixedly connected to the front bottom of the U-shaped support, and a second support foot is fixedly connected to the back bottom of the U-shaped support. Hydraulic push rods are provided on the sides of the first and second support feet. A front limit slide rail is fixedly connected to the front of the first support foot, and a rear limit slide rail is fixedly connected to the back of the second support foot.

[0008] Preferably, a drive motor is provided at one end of the front limit slide rail, and a reciprocating lead screw is provided inside the front limit slide rail.

[0009] Preferably, the front and rear ends of the U-shaped overhead seat are movably connected to an adjustment frame, and a limit slider is provided at the bottom center of the adjustment frame, the limit slider being adapted to the reciprocating lead screw.

[0010] Preferably, a front positioning plate is fixedly connected to the front of the U-shaped overhead seat, a rear positioning plate is fixedly connected to the back of the U-shaped overhead seat, a first sealing ring is provided between the fluoropolymer-lined frame and the front adjusting seat, and a second sealing ring is provided between the fluoropolymer-lined frame and the rear adjusting seat.

[0011] Preferably, a feeding rack is fixedly connected to the back of the four sets of fluorine tube racks, a movable plate is movably connected to one end of the feeding rack, a top material core is fixedly connected to one end of the movable plate, and a damping rubber sleeve is provided on the side of the top material core.

[0012] Preferably, the front of the rear adjustment seat is provided with a retraction spring sleeve, the inner wall of the retraction spring sleeve is provided with a mating top seat, and the front of the mating top seat is provided with insertion holes at the four corners.

[0013] Preferably, the mating top seat has an internal fitting seat, and the front of the fitting seat has a fitting pad.

[0014] Preferably, the front adjustment seat has a material clamping seat at each of the four corners of its back side, a plug connector at one end of the material clamping seat, and a top airbag inside the material clamping seat.

[0015] Preferably, one end of the glue-coating ring seat is provided with a glue-coating head, the sides of the four-way pipe body are all provided with glue-coating seats, the sides of the fluorine pipe frame are provided with lining grooves, and the sides of the fluorine-lined frame are provided with feeding grooves on all four sides.

[0016] S1: Place the four-way pipe body to be lined with fluoropolymer at the back of the front adjusting seat, and then initially limit it using the four corner clamps on the back of the front adjusting seat. At this time, activate the top airbag inside the clamp, which will then position the top of the four-way pipe at the four corners. Afterwards, send the four-way pipe body into the fluoropolymer lining frame through the front adjusting seat. Simultaneously, the second air pump inside the rear adjusting seat can be activated to inflate the shrink spring sleeve, so that the entire internal docking top seat also extends into the fluoropolymer lining frame, allowing the docking top seat to be inserted into the frame. The four corners of the connector are used to connect with the connector at one end of the clamping seat. At this time, the inner fastening seat and fastening pad of the connector can also be used to connect with the back of the four-way pipe body. This allows the four-way pipe body to be connected between the rear adjustment seat and the front adjustment seat for a more secure and stable positioning and fastening operation. The four-way pipe is lined with PTFE, which is made of polytetrafluoroethylene resin and processed into a high-density, sufficiently thick PTFE lining layer through advanced lining technology, giving the product excellent impermeability.

[0017] S2: By controlling the drive motors at one end of the front and rear limit slide rails, the internal reciprocating screw can be rotated for adaptive adjustment. This causes the limit slider on the reciprocating screw to move the entire adjustment frame along the front or rear limit slide rail, achieving rapid docking adjustment of the front and rear adjustment seats at both ends of the fluoropolymer lining frame. When the front and rear adjustment seats are docked at the front and rear ends of the fluoropolymer lining frame, the hydraulic push rods on the sides of the first and second support feet can be activated to lock the limit slider at the bottom. The front and rear ends of the U-shaped frame are stably positioned with the adjustment frame through the front and rear positioning plates, ensuring the stability of the subsequent four-way pipe body during the internal lining processing of the fluoropolymer lining frame. Furthermore, the design of the first and second sealing rings ensures a tight positioning connection between the fluoropolymer lining frame and the front and rear adjustment seats.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This method for molding PTFE four-way pipes involves a lining frame, a PTFE pipe support, an electric push rod, a guide seat, a glue-spreading ring seat, the four-way pipe body, a front adjustment seat, a rear adjustment seat, a first air control pump, a second air control pump, a shrink spring sleeve, a mating top seat, a plug hole, a sealing seat, a sealing pad, a clamping seat, a plug connector, a top air bladder, a glue applicator head, and a glue applicator seat. This allows the equipment to perform a more suitable positioning and molding operation for the PTFE four-way pipe. In actual use, the operator first places the four-way pipe body to be lined with PTFE on the back of the front adjustment seat, then... The four corner clamps on the back of the front adjusting seat provide initial positioning, ensuring the four-way pipe body is firmly and stably positioned between the rear and front adjusting seats. This guarantees a more stable completion of the subsequent fluoropolymer lining process. Stable guidance is achieved through the guide seats on the four sides of the fluoropolymer lining frame. The adhesive ring and applicator at the guide seats allow for uniform spraying of the lining adhesive at the applicator on the four-way pipe body, further ensuring a firm and stable fluoropolymer lining and demonstrating the practicality of the equipment design.

[0020] The method for lining the molded PTFE four-way pipe improves the overall performance of the equipment by incorporating a lining frame, front adjusting seat, rear adjusting seat, U-shaped overhead seat, first support foot, second support foot, hydraulic push rod, front limit slide rail, rear limit slide rail, drive motor, reciprocating screw, adjusting frame, limit slider, front positioning plate, rear positioning plate, first sealing ring, second sealing ring, feeding frame, movable plate, top material core, damping rubber sleeve, lining groove, and feeding groove. During daily use, operators can control the drive motors at one end of the front and rear limit slide rails to rotate the internal reciprocating screw accordingly. The adjustment operation involves activating the hydraulic push rods on the sides of the first and second support feet to lock the positioning slider at the bottom. The front and rear ends of the U-shaped overhead seat are stably positioned against the adjustment frame through the front and rear positioning plates, ensuring the stability of the subsequent four-way pipe body during the lining process inside the PTFE lining frame. Furthermore, the PTFE lining frame and the front and rear adjustment seats are also tightly connected through the design of the first and second sealing rings. Rapid lining material feeding is performed from the lining groove and feeding groove of the PTFE lining frame and PTFE pipe frame, greatly improving the lining efficiency of the equipment for molded PTFE four-way pipes and demonstrating the comprehensiveness of the equipment design. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention;

[0022] Figure 2 This is an overall schematic diagram of the fluoropolymer-lined frame structure of the present invention;

[0023] Figure 3 This is an overall schematic diagram of the front adjustment seat structure of the present invention;

[0024] Figure 4 This is an overall schematic diagram of the rear adjustment seat structure of the present invention;

[0025] Figure 5 This is an overall schematic diagram of the U-shaped overhead support structure of the present invention;

[0026] Figure 6 This is an overall schematic diagram of the feeding rack structure of the present invention;

[0027] Figure 7 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A;

[0028] Figure 8 For the present invention Figure 1 Enlarged schematic diagram of the structure at point B.

[0029] In the diagram: 1. Fluorine-lined frame; 2. Fluorine tube frame; 3. Electric push rod; 4. Guide seat; 5. Spreading ring seat; 6. Four-way pipe body; 7. Front adjusting seat; 8. Rear adjusting seat; 9. First air control pump; 10. Second air control pump; 11. U-shaped overhead seat; 12. First support foot; 13. Second support foot; 14. Hydraulic push rod; 15. Front limit slide rail; 16. Rear limit slide rail; 17. Drive motor; 18. Reciprocating lead screw; 19. Adjusting frame; 20. 21. Limiting slider; 22. Front positioning plate; 23. Rear positioning plate; 24. First sealing ring; 25. Second sealing ring; 26. Feeding rack; 27. Movable plate; 28. Top material core; 29. ​​Damping rubber sleeve; 30. Contraction spring sleeve; 31. Butt joint top seat; 32. Insertion hole; 33. Adhesive seat; 34. Adhesive pad; 35. Insertion connector; 36. Top joint airbag; 37. Glue applicator head; 38. Glue applicator seat; 39. Liner groove; 40. Feeding groove. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1-8 One embodiment provided by the present invention:

[0032] A method for lining a molded PTFE four-way pipe includes a lining frame 1, with PTFE pipe supports 2 fixedly connected to the four sides of the lining frame 1. An electric push rod 3 is installed at one end of each PTFE pipe support 2. Guide seats 4 are installed on the four sides of the inner wall of the lining frame 1, and a uniform adhesive ring seat 5 is installed at one end of each guide seat 4. A four-way pipe body 6 is installed at the center of the lining frame 1. A front adjusting seat 7 is movably connected to the front of the lining frame 1, and a rear adjusting seat 8 is movably connected to the back of the lining frame 1. A first air control pump 9 is installed on the front of the front adjusting seat 7, and a second air control pump 10 is installed on the back of the rear adjusting seat 8. A feeding rack 25 is fixedly connected to the back of the four sets of PTFE pipe supports 25. A movable plate 26 is movably connected to one end of the feeding rack 25, and a top material inlet is fixedly connected to one end of the movable plate 26. The core 27 has a damping sleeve 28 on its side. The front of the rear adjustment seat 8 has a shrink spring sleeve 29. The inner wall of the shrink spring sleeve 29 has a docking top seat 30. The four corners of the front of the docking top seat 30 have insertion holes 31. The inside of the docking top seat 30 has a pressing seat 32. The front of the pressing seat 32 has a pressing pad 33. The four corners of the back of the front adjustment seat 7 have a clamping seat 34. One end of the clamping seat 34 has a plug 35. The inside of the clamping seat 34 has a top airbag 36. One end of the glue-equalizing ring seat 5 has a glue-applying head 37. The sides of the four-way pipe body 6 are all equipped with glue-applying seats 38. The sides of the fluorine pipe rack 2 have a liner groove 39. The four sides of the fluorine-lined rack 1 have feeding grooves 40.

[0033] The U-shaped support 11 is fixedly connected to the bottom end of the fluoropolymer-lined frame 1. A first support foot 12 is fixedly connected to the front bottom of the U-shaped support 11, and a second support foot 13 is fixedly connected to the back bottom of the U-shaped support 11. Hydraulic push rods 14 are provided on the sides of the first and second support feet 12 and 13. A front limit slide rail 15 is fixedly connected to the front of the first support foot 12, and a rear limit slide rail 16 is fixedly connected to the back of the second support foot 13. A drive motor is provided at one end of the front limit slide rail 15. The machine 17 has a reciprocating screw 18 inside the front limit slide rail 15. The front and rear ends of the U-shaped bracket 11 are movably connected to the adjustment frame 19. The bottom center of the adjustment frame 19 is provided with a limit slider 20, which is adapted to the reciprocating screw 18. The front of the U-shaped bracket 11 is fixedly connected to the front positioning plate 21, and the back of the U-shaped bracket 11 is fixedly connected to the rear positioning plate 22. A first sealing ring 23 is provided between the fluoropolymer-lined frame 1 and the front adjustment seat 7, and a second sealing ring 24 is provided between the fluoropolymer-lined frame 1 and the rear adjustment seat 8.

[0034] S1: Place the four-way pipe body 6, which needs to be lined with fluorine, on the back of the front adjusting seat 7. Then, use the four corner clamping seats 34 on the back of the front adjusting seat 7 for initial positioning. At this time, activate the top connecting airbag 36 inside the clamping seat 34 to position the top of the four corners of the four-way pipe. Then, use the front adjusting seat 7 to send the four-way pipe body 6 into the interior of the fluorine-lined frame 1. Simultaneously, the second air control pump 10 inside the rear adjusting seat 8 can be activated to inflate the shrink spring sleeve 29, so that the entire internal docking top seat 30 can also extend into the interior of the fluorine-lined frame 1, allowing the docking... The insertion holes 31 at the four corners of the top seat 30 are matched with the insertion connector 35 at one end of the clamping seat 34. At this time, the clamping seat 32 and clamping pad 33 inside the top seat 30 can also be matched with the back of the four-way pipe body 6. This allows the four-way pipe body 6 to be clamped between the rear adjusting seat 8 and the front adjusting seat 7 for a more secure and stable positioning and tightening operation. The four-way pipe is lined with PTFE, which is made of polytetrafluoroethylene resin and processed into a high-density, sufficiently thick PTFE lining layer through advanced lining technology, giving the product excellent impermeability.

[0035] S2: By controlling the start of the drive motor 17 at one end of the front limit slide rail 15 and the rear limit slide rail 16, the internal reciprocating screw 18 can be driven to perform adaptive rotation adjustment. This causes the limit slider 20 sleeved on the reciprocating screw 18 to drive the adjustment frame 19 to move and adjust along the front limit slide rail 15 or the rear limit slide rail 16, realizing the rapid docking adjustment of the front adjustment seat 7 and the rear adjustment seat 8 at both ends of the fluoropolymer-lined frame 1. The front adjustment seat 7 and the rear adjustment seat 8 are respectively docked at the front and rear ends of the fluoropolymer-lined frame 1. When connected, the hydraulic push rods 14 on the sides of the first support foot 12 and the second support foot 13 can be activated to perform the positioning and locking operation of the limit slider 20 at the bottom. The front and rear ends of the U-shaped overhead seat 11 are stably fitted and positioned with the adjustment frame 19 through the front positioning plate 21 and the rear positioning plate 22, ensuring the stability of the subsequent four-way pipe body 6 during the internal lining processing of the fluoropolymer-lined frame 1. Furthermore, the fluoropolymer-lined frame 1 and the front adjustment seat 7 and the rear adjustment seat 8 can also be tightly connected through the design of the first sealing ring 23 and the second sealing ring 24.

[0036] Working principle: During use, the operator first places the four-way pipe body 6, which needs to be lined with fluorine, on the back of the front adjusting seat 7. Then, the four corner clamping seats 34 on the back of the front adjusting seat 7 provide initial positioning. At this time, the top-connecting airbag 36 inside the clamping seat 34 is activated, which will then position the top of the four corners of the four-way pipe. The four-way pipe body 6 is then fed into the fluorine-lined frame 1 through the front adjusting seat 7. Simultaneously, the second air pump 10 inside the rear adjusting seat 8 can be activated to inflate the shrink spring sleeve 29, causing the internal docking top seat 30 to extend into the fluorine-lined frame 1. This allows the insertion holes 31 at the four corners of the docking top seat 30 to mate with the insertion connectors 35 at one end of the clamping seat 34. At this point, the docking... The internal fastening seat 32 and fastening pad 33 of the top seat 30 can also be used to fit the back of the four-way pipe body 6 for a top-fitting operation, so that the four-way pipe body 6 is fitted between the rear adjusting seat 8 and the front adjusting seat 7 for a more secure and stable positioning and fastening operation, ensuring a more stable completion of the subsequent PTFE lining work of the four-way pipe. At the same time, the electric push rod 3 at one end of the four-sided PTFE tube rack 2 on the side of the PTFE lining frame 1 can be activated simultaneously to push in the PTFE tube required for the lining of the four-way pipe body 6. Stable docking and guidance are achieved through the guide seats 4 on the four sides of the inner wall of the PTFE lining frame 1. In addition, the glue-spraying ring seat 5 and glue-applying head 37 at the guide seat 4 can be used to evenly spray the lining adhesive at the glue-applying seat 38 of the four-way pipe body 6. This operation ensures a more secure and stable completion of the fluoropolymer lining of the four-way pipe. During daily use, operators can control the drive motors 17 at one end of the front limit slide rail 15 and the rear limit slide rail 16 to drive the internal reciprocating screw 18 for adaptive rotation adjustment. This causes the limit slider 20 sleeved on the reciprocating screw 18 to move the adjustment frame 19 along the front limit slide rail 15 or the rear limit slide rail 16, achieving rapid docking and adjustment of the front adjustment seats 7 and the rear adjustment seats 8 at both ends of the fluoropolymer lining frame 1. When the front adjustment seats 7 and the rear adjustment seats 8 are docked at the front and rear ends of the fluoropolymer lining frame 1, the hydraulic pressure on the sides of the first support foot 12 and the second support foot 13 can be activated. Push rod 14 performs positioning and locking operation of limit slider 20 at the bottom. The front and rear ends of U-shaped bracket 11 are stably fitted and positioned with adjustment frame 19 through front positioning plate 21 and rear positioning plate 22, ensuring the stability of the subsequent four-way pipe body 6 during the inner lining processing inside the fluoropolymer lining frame 1. The fluoropolymer lining frame 1 and the front adjustment seat 7 and rear adjustment seat 8 can also be tightly connected by the design of the first sealing ring 23 and the second sealing ring 24. At the same time, the fluoropolymer lining tube can be inserted from the loading rack 25. It is positioned inside the fluoropolymer tube frame 2 by the movable plate 26, the top material core 27 and the damping rubber sleeve 28. Finally, the lining tube is quickly loaded from the lining tube groove 39 and the feeding groove 40 of the fluoropolymer lining frame 1 and the fluoropolymer tube frame 2.This greatly improves the PTFE lining efficiency of the equipment for molded PTFE four-way pipes. The above summarizes the entire working principle of this invention.

[0037] 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 PTFE-lined device for a molded PTFE four-way pipe, comprising a PTFE-lined frame (1), characterized in that: The four sides of the fluoropolymer-lined frame (1) are fixedly connected to a fluoropolymer tube frame (2). One end of the fluoropolymer tube frame (2) is provided with an electric push rod (3). The four sides of the inner wall of the fluoropolymer-lined frame (1) are provided with guide seats (4). One end of the guide seats (4) is provided with a glue-spreading ring seat (5). The center of the interior of the fluoropolymer-lined frame (1) is provided with a four-way pipe body (6). The front of the fluoropolymer-lined frame (1) is movably connected to a front adjustment seat (7). The back of the fluoropolymer-lined frame (1) is movably connected to a rear adjustment seat (8). The front of the front adjustment seat (7) is provided with a first air control pump (9). The back of the rear adjustment seat (8) is provided with a second air control pump (10). U-shaped support (11), the bottom end of the fluoropolymer-lined frame (1) is fixedly connected to the U-shaped support (11), the front bottom of the U-shaped support (11) is fixedly connected to the first support foot (12), the back bottom of the U-shaped support (11) is fixedly connected to the second support foot (13), the sides of the first support foot (12) and the second support foot (13) are provided with hydraulic push rods (14), the front of the first support foot (12) is fixedly connected to the front of the first support foot (12) and the back of the second support foot (13) is fixedly connected to the rear limit slide rail (16), the back of the four sets of fluoropolymer tube frames (2) is fixedly connected to the feeding rack (25), one end of the feeding rack (25) is movably connected to the movable plate (26), one end of the movable plate (26) is fixedly connected to the top material core. (27) The side of the top material core (27) is provided with a damping rubber sleeve (28), the front of the rear adjustment seat (8) is provided with a shrinkage spring sleeve (29), the inner wall of the shrinkage spring sleeve (29) is provided with a docking top seat (30), the four corners of the front of the docking top seat (30) are provided with insertion holes (31), the four corners of the back of the front adjustment seat (7) are provided with a material clamping seat (34), one end of the material clamping seat (34) is provided with a plug connector (35), the inside of the material clamping seat (34) is provided with a top connecting airbag (36), one end of the glue-equalizing ring seat (5) is provided with a glue-applying head (37), the side of the four-way pipe body (6) is provided with a glue-applying seat (38), the side of the fluorine pipe frame (2) is provided with a liner groove (39), and the four sides of the fluorine-lined frame (1) are provided with a feeding groove (40).

2. The PTFE lining device for a molded PTFE four-way pipe according to claim 1, characterized in that: A drive motor (17) is provided at one end of the front limit slide rail (15), and a reciprocating lead screw (18) is provided inside the front limit slide rail (15).

3. The PTFE lining device for a molded PTFE four-way pipe according to claim 2, characterized in that: The front and rear ends of the U-shaped overhead seat (11) are movably connected to an adjustment frame (19). A limit slider (20) is provided at the bottom center of the adjustment frame (19), and the limit slider (20) is adapted to the reciprocating screw (18).

4. The PTFE lining device for a molded PTFE four-way pipe according to claim 3, characterized in that: The front of the U-shaped overhead seat (11) is fixedly connected to a front positioning plate (21), the back of the U-shaped overhead seat (11) is fixedly connected to a rear positioning plate (22), a first sealing ring (23) is provided between the fluoropolymer-lined frame (1) and the front adjustment seat (7), and a second sealing ring (24) is provided between the fluoropolymer-lined frame (1) and the rear adjustment seat (8).

5. The PTFE lining device for a molded PTFE four-way pipe according to claim 4, characterized in that: The mating top seat (30) is provided with a fastening seat (32) inside, and a fastening pad (33) is provided on the front of the fastening seat (32).

6. A method for lining a molded PTFE four-way pipe with PTFE, using the PTFE lining device for a molded PTFE four-way pipe as described in claim 5, characterized in that: S1: Place the four-way pipe body (6) to be lined with fluorine on the back of the front adjustment seat (7), and then use the four corner clamps (34) on the back of the front adjustment seat (7) for initial positioning. At this time, activate the top airbag (36) inside the clamp (34) to position the top of the four corners of the four-way pipe. Then, send the four-way pipe body (6) into the fluorine lining frame (1) through the front adjustment seat (7), and simultaneously activate the second air pump (10) inside the rear adjustment seat (8) to inflate the shrink spring sleeve (29), so that the entire docking top seat (30) inside also extends into the fluorine lining frame (1) at the same time, so that the insertion holes (31) at the four corners of the docking top seat (30) are matched with the insertion connector (35) at one end of the clamp (34). During the docking operation, the mating seat (32) and mating pad (33) inside the docking top seat (30) can also be matched with the back of the four-way pipe body (6) for a top-fitting operation, so that the four-way pipe body (6) is mated between the rear adjustment seat (8) and the front adjustment seat (7) for a more secure and stable positioning and fastening operation. Simultaneously, the electric push rod (3) at one end of the four-sided fluoropolymer tube frame (2) on the side of the fluoropolymer lining frame (1) is started, so that the fluoropolymer tube required for the four-way pipe body (6) is pushed in for a matching operation. The stable docking guidance operation is carried out through the guide seats (4) on the four sides of the inner wall of the fluoropolymer lining frame (1). The uniform glue ring seat (5) and glue application head (37) at the guide seat (4) are used to uniformly spray the lining adhesive at the glue application seat (38) of the four-way pipe body (6). S2: By controlling the drive motor (17) at one end of the front limit slide rail (15) and the rear limit slide rail (16), the internal reciprocating screw (18) is driven to perform adaptive rotation adjustment operation, thereby causing the limit slider (20) sleeved on the reciprocating screw (18) to drive the adjustment frame (19) to move and adjust along the front limit slide rail (15) or the rear limit slide rail (16), realizing the rapid docking adjustment operation of the front adjustment seat (7) and the rear adjustment seat (8) at both ends of the fluoropolymer lining frame (1). When the front adjustment seat (7) and the rear adjustment seat (8) are docked at the front and rear ends of the fluoropolymer lining frame (1), the hydraulic push rod (14) on the side of the first support foot (12) and the second support foot (13) is activated to limit the slider (20) at the bottom. In the positioning and locking operation, the front and rear ends of the U-shaped overhead seat (11) are stably positioned with the adjustment frame (19) through the front positioning plate (21) and the rear positioning plate (22), ensuring the stability of the subsequent four-way pipe body (6) during the lining process inside the fluoropolymer lining frame (1). The fluoropolymer lining frame (1) and the front adjustment seat (7) and the rear adjustment seat (8) are connected tightly through the design of the first sealing ring (23) and the second sealing ring (24). The fluoropolymer lining tube is placed from the loading rack (25), and positioned inside the fluoropolymer tube frame (2) through the movable plate (26), the top material core (27) and the damping rubber sleeve (28). Finally, the lining tube is quickly loaded from the lining tube groove (39) and the feeding groove (40) of the fluoropolymer lining frame (1) and the fluoropolymer tube frame (2).

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