Multi-layer co-extrusion device for polytetrafluoroethylene tube

Abstract

The utility model provides a multi-layer co-extrusion device for a polytetrafluoroethylene pipe, which relates to the technical field of pipeline extrusion devices and comprises a support, a plurality of material pipes are uniformly and fixedly connected to one side of the support, a feed hopper is fixedly connected to the outer surfaces of the material pipes, an auxiliary pipe is fixedly connected to the top of the feed hopper, and the auxiliary pipe is fixedly connected to the other side of the support. A first extrusion block is fixedly connected to one end of the material pipe, and a second extrusion block is arranged on one side of the first extrusion block. Through the arrangement of the protection plate, under the action of the threaded rod, the threaded rod can drive the protection plate to slide on the inner wall of the circular ring; the protection plate is arranged between the multilayer pipeline co-extrusion device and the cooling device until the top of the protection plate completely shields the top of the uncooled pipeline between the multilayer pipeline co-extrusion device and the cooling device, the semicircular protection plate can protect the top of the pipeline, the uncooled pipeline can be prevented from being collided by external force or sundries, and then the pipeline can be prevented from being damaged or contaminated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe extrusion devices, in particular to a multi-layer co-extrusion device for polytetrafluoroethylene pipes. Background Art

[0002] Polytetrafluoroethylene pipes are produced by using high-quality plunger extrusion pipes and adopting special processing techniques to closely combine steel pipes and plastic pipes. They have reliable and excellent corrosion resistance and can transport strongly corrosive gases and liquids at high temperatures, which cannot be replaced by other pipes. Generally, they are produced through a multi-layer pipe co-extrusion device.

[0003] After the multi-layer pipe co-extrusion device extrudes the polytetrafluoroethylene pipe, it is necessary to cool the pipe and connect the pipe to the cooling device. However, there is a certain distance between the multi-layer pipe co-extrusion device and the cooling device, and the pipe in this distance is not cooled. If an external force or debris collides with this section of the pipe, it may cause the pipe to be damaged or contaminated. Summary of the Utility Model

[0004] The utility model provides a multi-layer co-extrusion device for polytetrafluoroethylene pipes to solve the problem that there is a certain distance between the multi-layer pipe co-extrusion device and the cooling device, the pipe in this distance is not cooled, and if an external force or debris collides with this section of the pipe, it may cause the pipe to be damaged or contaminated.

[0005] To achieve the above object, the utility model adopts the following technical scheme: A multi-layer co-extrusion device for polytetrafluoroethylene pipes, including a bracket, a plurality of material pipes are evenly and fixedly connected to one side of the bracket, a feeding hopper is fixedly connected to the outer surface of the material pipe, an auxiliary pipe is fixedly connected to the top of the feeding hopper, a first extrusion block is fixedly connected to one end of the material pipe, a second extrusion block is arranged on one side of the first extrusion block, a die is arranged on one side of one of the second extrusion blocks, a protection device for shielding the surface of the extruded pipe is arranged on the outer surface of the die, connecting pipes are fixedly connected to the outer surfaces of the first extrusion block and the second extrusion block located in the middle, one ends of the two connecting pipes are respectively fixedly connected to the outer surfaces of one of the first extrusion blocks and one of the second extrusion blocks, and support rods are fixedly connected to the four corners of the bottom of the bracket.

[0006] The effects achieved by the above components are as follows: By setting the protection device, it is possible to protect the top of the uncooled pipe between the multi-layer pipe co-extrusion device and the cooling device, which is beneficial to preventing the problem that the pipe is damaged or contaminated due to an external force or debris colliding with this section of the pipe.

[0007] Preferably, the protection device includes a circular ring disposed on the outer surface of the die. One side of the circular ring is fixedly connected to one side of one of the second extrusion blocks. A protection plate is slidably connected to the inner wall of the circular ring. The cross-section of the protection plate in the vertical direction is semi-circular. A first extension block is fixedly connected to the middle of one side of the protection plate. A threaded rod is disposed inside the first extension block. A side plate is threadedly connected to the outer surface of the threaded rod. The bottom of the side plate is fixedly connected to the outer surface of the circular ring. One end of the threaded rod is fixedly connected to a bearing, and the outer surface of the bearing is fixedly connected to the inner wall of the first extension block.

[0008] The effects achieved by the above components are as follows: By providing the protection plate, under the action of the threaded rod, when the threaded rod is rotated, the threaded rod will drive the protection plate to slide on the inner wall of the circular ring until the top of the protection plate completely covers the top of the uncooled pipe between the multi-layer pipe co-extrusion device and the cooling device. The semi-circular protection plate can protect the top of the pipe, which is beneficial to preventing external forces or debris from colliding with the uncooled pipe, and thus is beneficial to preventing the pipe from being damaged or contaminated.

[0009] Preferably, the other end of the threaded rod is fixedly connected to an operation block, and protrusions are provided on the outer surface of the operation block.

[0010] The effects achieved by the above components are as follows: By providing the operation block, rotating the operation block can drive the threaded rod to rotate. At the same time, protrusions are provided on the outer surface of the operation block, which can effectively increase the friction on the outer surface of the operation block and play an anti-slip role when rotating the operation block.

[0011] Preferably, second extension blocks are symmetrically and fixedly connected to one side of the protection plate. A round rod is fixedly connected to one side of the second extension blocks. A round hole block is slidably connected to the outer surface of the round rod. One sides of the two round hole blocks are symmetrically and fixedly connected to the outer surface of the circular ring.

[0012] The effects achieved by the above components are as follows: By providing the circular ring, when the protection plate expands and contracts on the inner wall of the circular ring under the action of the threaded rod, it will drive the round rod connected to the second extension block to slide synchronously inside the round hole block, which can play a limiting role on the protection plate and make the protection plate move more stably.

[0013] Preferably, an auxiliary device is provided on the top of the side plate, which can assist the extruded pipe in heat dissipation and accelerate the solidification of the pipe.

[0014] The effects achieved by the above components are as follows: By providing the auxiliary device, it can assist the pipe in heat dissipation and accelerate the solidification of the pipe, further preventing the pipe from being damaged or contaminated.

[0015] Preferably, the auxiliary device includes a top plate, one side of the top plate is fixedly connected to one side of the side plate, a motor is arranged on the top of the top plate, a fan blade is arranged at the bottom of the top plate, an output end of the motor is fixedly connected to one side of the fan blade, and a plurality of auxiliary grooves are uniformly formed on an outer surface of the protection plate.

[0016] The effects achieved by the above components are as follows: By arranging the fan blade and starting the motor, the motor drives the fan blade to rotate. During the rotation of the fan blade, the air flow around is accelerated, and through the auxiliary grooves, the just-extruded pipeline is cooled rapidly, which can improve the hardness of the pipeline and further prevent the pipeline from being damaged or contaminated.

[0017] Preferably, adjusting devices are arranged at bottoms of the four support rods. The adjusting devices include four rectangular cylinders, an outer surface of the support rod is slidably connected to an inner wall of the rectangular cylinder, one ends of the four rectangular cylinders are fixedly connected to the same rectangular frame, both sides of a top of the rectangular frame are symmetrically and fixedly connected with sleeves, a threaded insertion rod is slidably connected to an inner wall of the sleeve, and one ends of the two threaded insertion rods are fixedly connected to a bottom of the support.

[0018] The effects achieved by the above components are as follows: By arranging the threaded insertion rod and the sleeve, pushing the threaded insertion rod to slide on the inner wall of the sleeve, the threaded insertion rod drives the support rod connected to the support to slide synchronously on the inner wall of the sleeve, so that the height of the die can be adjusted, and the height of the die can be adapted to cooling devices with different heights, improving the practicability of the multi-layer pipeline co-extrusion device.

[0019] Preferably, a nut is arranged on an outer surface of the threaded insertion rod, and an inner wall of the nut is in threaded connection with the outer surface of the threaded insertion rod.

[0020] The effects achieved by the above components are as follows: By arranging the nut and rotating the nut, one side of the nut abuts against one end of the sleeve, so that the nut can limit between the threaded insertion rod and the sleeve, and further fix the height of the die.

[0021] Preferably, a gasket is arranged between the nut and the sleeve, and an outer surface of the threaded insertion rod is inserted into an inner wall of the gasket.

[0022] The effects achieved by the above components are as follows: By arranging the gasket, the gasket can replace one side of the nut to abut against one end of the sleeve, which can increase the contact area between the nut and one end of the sleeve and is beneficial to preventing the nut from loosening easily.

[0023] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0024] In the present utility model, by providing a protective plate, under the action of the threaded rod, the threaded rod can drive the protective plate to slide on the inner wall of the circular ring until the top of the protective plate completely covers the top of the uncooled pipe between the multi-layer pipe co-extrusion device and the cooling device. The semi-circular protective plate can protect the top of the pipe, which is beneficial to preventing external forces or debris from colliding with the uncooled pipe, and thus is beneficial to preventing the pipe from being damaged or contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional structural schematic diagram of the main body of the present utility model;

[0026] Figure 2 is a three-dimensional structural schematic diagram of the material pipe of the present utility model;

[0027] Figure 3 For the present utility model Figure 2 is an enlarged structural schematic diagram of part A;

[0028] Figure 4 is a three-dimensional structural schematic diagram of the adjusting device of the present utility model.

[0029] Legend: 1, support; 2, material pipe; 3, feed hopper; 4, auxiliary pipe; 5, first extrusion block; 6, second extrusion block; 7, die; 8, protection device; 81, circular ring; 82, protective plate; 83, first extension block; 84, threaded rod; 85, side plate; 86, auxiliary device; 861, auxiliary groove; 862, top plate; 863, motor; 864, fan blade; 87, bearing; 88, operation block; 89, second extension block; 810, round rod; 811, round hole block; 9, adjusting device; 91, rectangular cylinder; 92, rectangular frame; 93, sleeve; 94, threaded insertion rod; 95, nut; 96, gasket; 10, support rod; 11, connecting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Example 1, refer to Figures 1 to 3As shown in the figure, this embodiment discloses a multi-layer co-extrusion device for polytetrafluoroethylene pipes, which includes a bracket 1. A number of material pipes 2 are evenly and fixedly connected to one side of the bracket 1. A feed hopper 3 is fixedly connected to the outer surface of the material pipe 2. An auxiliary pipe 4 is fixedly connected to the top of the feed hopper 3. One end of the material pipe 2 is fixedly connected to a first extrusion block 5. A second extrusion block 6 is arranged on one side of the first extrusion block 5. A die 7 is arranged on one side of one of the second extrusion blocks 6. A protection device 8 for shielding the surface of the extrusion pipe is arranged on the outer surface of the die 7. Connecting pipes 11 are fixedly connected to the outer surfaces of the first extrusion block 5 and the second extrusion block 6 located in the middle. One end of the two connecting pipes 11 is respectively fixedly connected to the outer surfaces of one of the first extrusion blocks 5 and one of the second extrusion blocks 6. Support rods 10 are fixedly connected to the four corners of the bottom of the bracket 1. By setting the protection device 8, it is possible to protect the top of the uncooled pipe between the multi-layer pipe co-extrusion device and the cooling device, which is beneficial to preventing the problem that the pipe is damaged or contaminated due to external force or debris hitting this section of the pipe.

[0031] Refer to Figure 2 and Figure 3As shown, the protective device 8 includes a circular ring 81. The circular ring 81 is arranged on the outer surface of the die 7. One side of the circular ring 81 is fixedly connected to one side of one of the second extrusion blocks 6. A protective plate 82 is slidably connected to the inner wall of the circular ring 81. The cross-section of the protective plate 82 in the vertical direction is semi-circular. A first extension block 83 is fixedly connected to the middle of one side of the protective plate 82. A threaded rod 84 is arranged on the inner wall of the first extension block 83. A side plate 85 is threadedly connected to the outer surface of the threaded rod 84. The bottom of the side plate 85 is fixedly connected to the outer surface of the circular ring 81. One end of the threaded rod 84 is fixedly connected to a bearing 87. The outer surface of the bearing 87 is fixedly connected to the inner wall of the first extension block 83. By setting the protective plate 82, under the action of the threaded rod 84, when the threaded rod 84 is rotated, the threaded rod 84 will drive the protective plate 82 to slide on the inner wall of the circular ring 81 until the top of the protective plate 82 completely covers the top of the uncooled pipe between the multi-layer pipe co-extrusion device and the cooling device. The semi-circular protective plate 82 can protect the top of the pipe, which is beneficial to preventing external forces or sundries from colliding with the uncooled pipe, and further beneficial to protecting the pipe from being damaged or contaminated; the other end of the threaded rod 84 is fixedly connected to an operation block 88. Protrusions are arranged on the outer surface of the operation block 88. By setting the operation block 88, rotating the operation block 88 can drive the threaded rod 84 to rotate. At the same time, the protrusions are arranged on the outer surface of the operation block 88, which can effectively increase the friction force on the outer surface of the operation block 88 and has an anti-slip effect when rotating the operation block 88; symmetrically fixed to one side of the protective plate 82 are second extension blocks 89. Fixedly connected to one side of the second extension block 89 is a round rod 810. The outer surface of the round rod 810 is slidably connected to a round hole block 811. One side of the two round hole blocks 811 is symmetrically fixedly connected to the outer surface of the circular ring 81. By setting the circular ring 81, when the protective plate 82 expands and contracts on the inner wall of the circular ring 81 under the action of the threaded rod 84, it will drive the round rod 810 connected to the second extension block 89 to slide synchronously on the inner wall of the round hole block 811, which can play a role in limiting the protective plate 82 and making the protective plate 82 more stable during the movement process.

[0032] Referring to Figures 2 to 4As shown in the figure, an auxiliary device 86 is provided at the top of the side plate 85, which can assist the extruded pipe in heat dissipation and accelerate the solidification of the pipe. By setting the auxiliary device 86, it can assist the pipe in heat dissipation, accelerate the solidification of the pipe, and further prevent the pipe from being damaged or contaminated; the auxiliary device 86 includes a top plate 862, one side of the top plate 862 is fixedly connected to one side of the side plate 85, a motor 863 is provided on the top of the top plate 862, a fan blade 864 is provided at the bottom of the top plate 862, and the output end of the motor 863 is fixedly connected to one side of the fan blade 864. A number of auxiliary grooves 861 are evenly formed on the outer surface of the protective plate 82. By setting the fan blade 864 and starting the motor 863, the motor 863 will drive the fan blade 864 to rotate. During the rotation of the fan blade 864, the air flow around will be accelerated and pass through the auxiliary grooves 861 to accelerate the heat dissipation of the freshly extruded pipe, which can improve the hardness of the pipe and further prevent the pipe from being damaged or contaminated.

[0033] Refer to Figure 4 As shown in the figure, an adjusting device 9 is provided at the bottom of the four support rods 10. The adjusting device 9 includes four rectangular cylinders 91. The outer surface of the support rod 10 is slidably connected to the inner wall of the rectangular cylinder 91. One end of the four rectangular cylinders 91 is fixedly connected to the same rectangular frame 92. Both sides of the top of the rectangular frame 92 are symmetrically and fixedly connected with sleeves 93. The inner wall of the sleeve 93 is slidably connected with threaded insertion rods 94. One end of the two threaded insertion rods 94 is fixedly connected to the bottom of the bracket 1. By setting the threaded insertion rods 94 and the sleeves 93, pushing the threaded insertion rods 94 to slide on the inner walls of the sleeves 93, the threaded insertion rods 94 will drive the support rods 10 connected to the bracket 1 to slide synchronously on the inner walls of the sleeves 93, so as to adjust the height of the die 7, making the height of the die 7 adaptable to cooling devices of different heights and improving the practicability of the multi-layer pipe co-extrusion device.

[0034] Refer to Figure 4 As shown in the figure, a nut 95 is provided on the outer surface of the threaded insertion rod 94. The outer surface of the threaded insertion rod 94 is threadedly connected to the inner wall of the nut 95. By setting the nut 95 and rotating the nut 95, one side of the nut 95 abuts against one end of the sleeve 93, then the nut 95 can limit the position between the threaded insertion rod 94 and the sleeve 93, and further fix the height of the die 7; a gasket 96 is provided between the nut 95 and the sleeve 93. The outer surface of the threaded insertion rod 94 is inserted into the inner wall of the gasket 96. By setting the gasket 96, it can replace one side of the nut 95 to abut against one end of the sleeve 93, which can increase the contact area between the nut 95 and one end of the sleeve 93 and is conducive to preventing the nut 95 from loosening easily.

[0035] Working principle: When it is necessary to protect the uncooled pipeline, rotate the operation block 88 to drive the threaded rod 84 to rotate. Under the limitation of the round rod 810 and the round hole block 811, the threaded rod 84 will drive the protection plate 82 to slide on the inner wall of the ring 81 until the protection plate 82 completely covers the top of the uncooled pipeline between the multi-layer pipeline co-extrusion device and the cooling device. The semi-circular protection plate 82 can protect the top of the pipeline, which is beneficial to prevent external forces or sundries from colliding with the uncooled pipeline, and further beneficial to prevent the pipeline from being damaged or contaminated; at the same time, start the motor 863, and the motor 863 will drive the fan blade 864 to rotate. During the rotation of the fan blade 864, the air flow around will be accelerated, and through the auxiliary groove 861, the just-extruded pipeline will be accelerated in heat dissipation, which can improve the hardness of the pipeline and further prevent the pipeline from being damaged or contaminated; push the threaded plug rod 94 to slide on the inner wall of the sleeve 93, and the threaded plug rod 94 will drive the support rod 10 connected to the bracket 1 to slide synchronously on the inner wall of the sleeve 93 until the die head 7 reaches the appropriate height, and then rotate the nut 95 so that one side of the nut 95 abuts against one side of the gasket 96, and one side of the gasket 96 abuts against one end of the sleeve 93, then the height of the die head 7 can be adjusted so that the height of the die head 7 can be adapted to cooling devices of different heights, improving the practicability of the multi-layer pipeline co-extrusion device.

Claims

1. A multi-layer co-extrusion device for polytetrafluoroethylene tubes, comprising a support (1), characterized in that: A plurality of material pipes (2) are evenly and fixedly connected to one side of the bracket (1); a feed hopper (3) is fixedly connected to the outer surface of the material pipe (2); an auxiliary pipe (4) is fixedly connected to the top of the feed hopper (3); one end of the material pipe (2) is fixedly connected to a first extrusion block (5); a second extrusion block (6) is arranged on one side of the first extrusion block (5); a die (7) is arranged on one side of one of the second extrusion blocks (6); and a protective device (8) for shielding the surface of the extruded pipe is arranged on the outer surface of the die (7).

2. The multi-layer co-extrusion device for polytetrafluoroethylene tube according to claim 1, characterized in that: The outer surfaces of the first extrusion block (5) and the second extrusion block (6) located in the middle are fixedly connected to connecting pipes (11), one end of the two connecting pipes (11) is respectively fixedly connected to the outer surface of one of the first extrusion blocks (5) and one of the second extrusion blocks (6), and the four corners of the bottom of the bracket (1) are fixedly connected to support rods (10).

3. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 2, characterized in that: The protective device (8) comprises a circular ring (81), wherein the circular ring (81) is arranged on the outer surface of the die (7), one side of the circular ring (81) is fixedly connected to one side of one of the second extrusion blocks (6), the inner wall of the circular ring (81) is slidably connected to a protective plate (82), the vertical cross section of the protective plate (82) is semi-circular, the middle part of one side of the protective plate (82) is fixedly connected to a first extension block (83), the inner wall of the first extension block (83) is provided with a threaded rod (84), the outer surface of the threaded rod (84) is threadedly connected to a side plate (85), the bottom of the side plate (85) is fixedly connected to the outer surface of the circular ring (81), one end of the threaded rod (84) is fixedly connected to a bearing (87), the outer surface of the bearing (87) is fixedly connected to the inner wall of the first extension block (83).

4. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 3, characterized in that: The other end of the threaded rod (84) is fixedly connected to an operating block (88), and a protrusion is provided on the outer surface of the operating block (88).

5. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 3, characterized in that: One side of the protective plate (82) is symmetrically fixedly connected to a second extension block (89), one side of the second extension block (89) is fixedly connected to a round rod (810), the outer surface of the round rod (810) is slidably connected to a round hole block (811), and one side of the two round hole blocks (811) is symmetrically fixedly connected to the outer surface of the circular ring (81).

6. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 3, characterized in that: An auxiliary device (86) is provided on the top of the side plate (85) to assist the extruded pipe in dissipating heat and accelerating the solidification of the pipe.

7. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 6, characterized in that: The auxiliary device (86) comprises a top plate (862), one side of the top plate (862) is fixedly connected to one side of the side plate (85), a motor (863) is arranged on the top of the top plate (862), a fan blade (864) is arranged on the bottom of the top plate (862), an output end of the motor (863) is fixedly connected to one side of the fan blade (864), and a plurality of auxiliary grooves (861) are evenly arranged on the outer surface of the protective plate (82).

8. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 2, characterized in that: An adjusting device (9) is provided at the bottom of the four support rods (10), and the adjusting device (9) includes four rectangular tubes (91). The outer surface of the support rod (10) is slidably connected to the inner wall of the rectangular tube (91), one end of the four rectangular tubes (91) is fixedly connected to the same rectangular frame (92), both sides of the top of the rectangular frame (92) are symmetrically fixedly connected to sleeves (93), the inner wall of the sleeve (93) is slidably connected to a threaded rod (94), and one end of two threaded rods (94) are fixedly connected to the bottom of the bracket (1).

9. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 8, characterized in that: A nut (95) is provided on the outer surface of the threaded rod (94), and the outer surface of the threaded rod (94) is threadedly connected to the inner wall of the nut (95).

10. The multi-layer co-extrusion device for polytetrafluoroethylene tubes according to claim 9, characterized in that: A gasket (96) is provided between the nut (95) and the sleeve (93), and the outer surface of the threaded rod (94) is inserted into the inner wall of the gasket (96).

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