Ultra-high molecular weight polyethylene pipe production equipment

Abstract

The invention relates to the field of polyethylene pipe production, and discloses ultra-high molecular weight polyethylene pipe production equipment which comprises a base, a screw conveying device and a heating device are arranged at the top of the base, and a feeding hopper and an extrusion forming device are fixedly mounted at the two ends of the screw conveying device; the screw conveying device is used for conveying and heating a polyethylene material, the extrusion forming device is used for performing extrusion forming on the polyethylene material, a scraping device is arranged at the position, under the screw conveying device, of the top of the base, and a direction limiting device is slidably mounted in the scraping device; a scraping piece in the scraping device ascends to scrape polyethylene materials adhered to the surfaces of a conveying rod and conveying blades, the phenomena of clustering and blocking of the molten polyethylene materials are prevented, a fan-shaped shifting plate arranged in a first scraping plate extends out, the molten polyethylene materials close to the outer portion of the conveying rod are conveyed to the edge, and the conveying efficiency is improved. And the uniformity of polyethylene materials conveyed in the conveying pipeline is improved.

Description

Technical Field

[0001] The invention relates to the technical field of polyethylene pipe production, and more specifically, to an ultra-high molecular weight polyethylene pipe production device. Background Art

[0002] Ultra-high molecular weight polyethylene pipe production is an advanced manufacturing process, which mainly uses ultra-high molecular weight polyethylene as raw material and manufactures pipes through extrusion molding process. Ultra-high molecular weight polyethylene has excellent properties such as high strength, high wear resistance, low friction coefficient, corrosion resistance and self-lubrication. During the production process, the raw materials are melted at high temperature, extruded, cooled and shaped, and finally made into pipes. This kind of pipe is widely used in chemical, mining, food processing, medicine and other fields for conveying solid particles, slurries and corrosive liquids.

[0003] A patent application with publication number CN119261144A discloses a production equipment for ultra-high molecular weight polyethylene pipes, including an equipment box, an extrusion heating mechanism is arranged on the top of the equipment box; the extrusion heating mechanism includes a driving device, the driving device is fixedly installed on the top of the equipment box, a transmission shaft is fixedly connected to the output end of the driving device, a gear box is fixedly installed at one end of the transmission shaft, and a fixed pipe is fixedly connected to one side of the gear box. The raw materials are efficiently pretreated to ensure that the raw material particles are uniform and fully mixed, laying a good foundation for the subsequent plasticization and extrusion process, improving the quality and performance stability of the pipe, being able to meet the temperature requirements of ultra-high molecular weight polyethylene pipes at different production stages, making the molecular structure of the pipe more regular, thereby enhancing the strength, toughness and corrosion resistance of the pipe, and providing reliable technical support for the large-scale production of ultra-high molecular weight polyethylene pipes.

[0004] When the above-mentioned device uses screw blades to transport polyethylene raw materials, a heating device is provided on the outside of the conveying pipeline, and the inside is transported by rotating screw blades. During the transportation process, since the spiral blades are metal structures, the outside of the pipeline is heated, and when the raw materials have not entered the heating pipeline, with long-term use, the heat conducted from the outside of the spiral blades is large, and a small amount of melting occurs. The transported polyethylene raw materials adhere to the blades, resulting in reduced efficiency of blade transportation, causing blockage and uneven feeding. Summary of the invention

[0005] The present invention provides an ultra-high molecular weight polyethylene pipe production device, which solves the technical problems in the related art that during the transportation process, since the spiral blades are metal structures and the pipeline is heated externally, when the raw materials have not entered the heating pipeline, the spiral blades conduct more heat externally with long-term use, resulting in a small amount of melting, and the transported polyethylene raw materials adhere to the blades, resulting in reduced efficiency of blade transportation, causing blockage and uneven feeding.

[0006] The invention provides an ultra-high molecular weight polyethylene pipe production device, comprising a base, a screw conveying device and a heating device are arranged on the top of the base, a feeding funnel and an extrusion forming device are fixedly installed at both ends of the screw conveying device, the screw conveying device is used for conveying and heating polyethylene materials, the extrusion forming device is used for extruding polyethylene materials, a scraping device is arranged on the top of the base directly below the screw conveying device, a direction limiting device is slidably installed inside the scraping device; the scraping device comprises an internal transmission ring, an external transmission ring, teeth, and a scraping piece, the shape of the internal transmission ring is the same as that of the external transmission ring, the internal transmission ring and the external transmission ring are in the same vertical plane, the inner wall of the external transmission ring and the outer wall of the internal transmission ring are slidably installed with a direction limiting device, the side wall annular array of the external transmission ring has a plurality of teeth, the direction limiting device is meshed with the teeth, a scraping piece is arranged on the direction limiting device, the direction limiting device drives the scraping piece to slide inside the screw conveying device, and the scraping piece is used to scrape the polyethylene material adhered to the inside of the screw conveying device.

[0007] As a further optimization scheme of the present invention, the screw conveying device includes a conveying pipe fixedly installed on the top of the base, a conveying rod is rotatably installed inside the conveying pipe, a conveying blade is fixedly installed on the outer wall of the conveying rod, the outer diameter of the conveying blade is the same as the inner diameter of the conveying pipe, and a scraping groove is provided at the bottom of the conveying pipe, and the scraping groove is located directly above the scraping device.

[0008] As a further optimization scheme of the present invention, the scraping device includes a first fixed block symmetrically arranged and fixedly installed on the top of the base, a second fixed block is fixedly installed on the side of the first fixed block, a third fixed block is fixedly installed on the end of the second fixed block, an external transmission ring is fixedly installed on the end of the first fixed block, an internal transmission ring is fixedly installed on the end of the third fixed block, two direction limiting devices are slidably installed between the internal transmission ring and the external transmission ring, and a scraper is fixedly installed on the direction limiting device.

[0009] As a further optimization scheme of the present invention, the direction limiting device includes a limit slider slidably installed between the internal transmission ring and the external transmission ring, a first rotating rod is rotatably installed inside the limit slider, a gear is fixedly installed on the end of the first rotating rod, a first motor is fixedly installed on the side of the gear, a second fixed plate is fixedly installed on the outer wall of the first motor, a first fixed plate is fixedly installed on the side wall of the second fixed plate, a limit column is fixedly installed on the side of the first fixed plate close to the limit slider, the outer wall of the limit column is meshed with the outer wall of the external transmission ring, and a direction limit block is fixedly installed on the side of the limit slider away from the first motor, and the direction limit block makes the scraper at the top of the limit slider in a vertical upward position.

[0010] As a further optimization scheme of the present invention, the scraper includes a first scraper fixedly installed on the top of the limiting slider, a first lifting column is slidably installed inside the first scraper, a second lifting column is fixedly installed on the bottom of the first lifting column, a spring is provided on the outer wall of the second lifting column, the top of the spring is connected to the bottom of the first lifting column, the bottom of the spring is connected to the inner wall of the first scraper, a rotating block is fixedly installed on the bottom of the second lifting column, a rotating column is rotatably installed inside the rotating block, two first lifting blocks are rotatably installed on the outer wall of the rotating column, a telescopic rod is fixedly installed on the side wall of the first lifting block, a scraping rotating rod is fixedly installed on the end of the telescopic rod, a fan-shaped paddle is fixedly installed on the end of the scraping rotating rod, and the fan-shaped paddle is rotatably installed inside the first scraper.

[0011] As a further optimization solution of the present invention, a torsion spring is provided at the connection position between the fan-shaped paddle and the inside of the first scraper, and the fan-shaped paddle is symmetrically installed inside the first scraper.

[0012] As a further optimization solution of the present invention, the inner wall of the scraping groove is provided with high temperature resistant fluororubber, and the fluororubber is used to seal the inner wall of the conveying pipe.

[0013] As a further optimization solution of the present invention, two second fixing blocks are symmetrically arranged on the outer wall of the first fixing block, and the diameter of the two second fixing blocks is greater than the distance between the direction limiting block and the first motor.

[0014] As a further optimization solution of the present invention, the two side surfaces of the first scraper are in the same shape as the outer wall of the conveying blade.

[0015] As a further optimization solution of the present invention, the farthest distance between the two first fixing blocks is smaller than the length of the scraping groove.

[0016] The beneficial effects of the present invention are:

[0017] The ultra-high molecular weight polyethylene pipe production equipment described in the present invention scrapes the polyethylene material adhered to the surface of the conveying rod and the conveying blade by the scraping member inside the scraping device rising to prevent the molten polyethylene material from agglomerating and clogging. The fan-shaped paddle arranged inside the first scraper extends so that the molten polyethylene material near the outside of the conveying rod is transported to the edge, thereby improving the uniformity of transporting the polyethylene material inside the conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall appearance of the device of the present invention;

[0019] Figure 2 It is a schematic diagram of the installation position of the overall device of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the screw conveying device of the present invention;

[0021] Figure 4 It is a schematic diagram of the connection between the screw conveying device and the scraping device of the present invention;

[0022] Figure 5 It is a partial structural schematic diagram of the scraping device of the present invention;

[0023] Figure 6 It is a schematic diagram of the internal structure of the direction limiting device of the present invention;

[0024] Figure 7 It is a schematic diagram of the internal structure installation of the scraping member of the present invention;

[0025] Figure 8 It is a schematic diagram of the internal transmission structure of the scraping member of the present invention.

[0026] In the figure:

[0027] 1. Base; 11. Feeding funnel; 12. Screw conveying device; 121. Conveying pipeline; 122. Conveying rod; 123. Conveying blade; 124. Scraping groove; 13. Heating device; 14. Extrusion forming device;

[0028] 2. Scraping device; 21. First fixed block; 22. Second fixed block; 23. Third fixed block; 24. Internal transmission ring; 25. External transmission ring; 26. Teeth; 27. Scraping member; 271. First scraper; 272. First lifting column; 273. Second lifting column; 274. Spring; 275. Rotating block; 276. Rotating column; 277. First lifting block; 278. Telescopic rod; 279. Scraping rotating rod; 2791. Fan-shaped paddle;

[0029] 3. Direction limiting device; 31. Limiting slider; 32. First rotating rod; 33. Gear; 34. First fixed plate; 35. Second fixed plate; 36. First motor; 37. Limiting column; 38. Direction limiting block. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0031] like Figure 1 to Figure 2 As shown, an ultra-high molecular weight polyethylene pipe production device according to an embodiment of the present invention comprises a base 1, a screw conveying device 12 and a heating device 13 are arranged on the top of the base 1, a feeding funnel 11 and an extrusion forming device 14 are fixedly installed at both ends of the screw conveying device 12, the screw conveying device 12 is used to convey and heat the polyethylene material, the extrusion forming device 14 is used to extrude the polyethylene material, and a scraping device 2 is arranged on the top of the base 1 directly below the screw conveying device 12;

[0032] like Figures 3 to 5 As shown, a direction limiting device 3 is slidably installed inside the scraping device 2; the scraping device 2 includes an internal transmission ring 24, an external transmission ring 25, teeth 26, and a scraping member 27. The shape of the internal transmission ring 24 is the same as that of the external transmission ring 25. The internal transmission ring 24 and the external transmission ring 25 are in the same vertical plane. The inner wall of the external transmission ring 25 and the outer wall of the internal transmission ring 24 are slidably installed with a direction limiting device 3. The side wall of the external transmission ring 25 has a plurality of teeth 26 in an annular array. The direction limiting device 3 is meshed with the teeth 26. A scraping member 27 is arranged on the direction limiting device 3. The direction limiting device 3 drives the scraping member 27 to slide inside the screw conveying device 12. The scraping member 27 is used to scrape the polyethylene material adhered to the inside of the screw conveying device 12.

[0033] It should be noted that the polyethylene material is put into the feeding hopper 11, and the screw conveying device 12 is driven by the motor to rotate, so that the polyethylene material inside the screw conveying device 12 is transported, and the screw conveying device 12 is provided with a conveying pipe 121, a conveying rod 122, a conveying blade 123 and a scraping groove 124 inside. The conveying pipe 121 is fixedly installed on the top of the base 1, and the conveying rod 122 and the conveying blade 123 are rotatably installed inside the conveying pipe 121, and the scraping groove 124 is located directly above the scraping device 2. As the heating device 13 continues to heat, the conveying rod 122 and the conveying blade 123 near the side of the base 1 are rotated. Due to the heat conduction effect on 123, the polyethylene material that has not been transported to the position of the heating device 13 is heated, softened and melted, causing the polyethylene material to adhere to the outer wall of the conveying rod 122 and the conveying blade 123 located at the front end of the heating device 13 (the conveying direction of the polyethylene material is from the feeding funnel 11 to the extrusion forming device 14, and the polyethylene material transported inside the screw conveying device 12 that has not passed through the heating device 13 belongs to the front end of the heating device 13). This position is not a heating position, so the polyethylene material may be agglomerated and blocked. If it is directly at the heating device 13, the polyethylene material will be blocked. If a cooling device is provided at the front end, the melting effect of the heating device 13 when heating is poor, causing further blockage. Therefore, a scraping groove 124 is provided on the conveying pipe 121, and the direction limiting device 3 is started to drive the scraper 27 to slide on the outer wall of the internal transmission ring 24 and the inner wall of the external transmission ring 25, so that the scraper 27 rises to the inside of the conveying pipe 121 and contacts with the surfaces of the conveying rod 122 and the conveying blade 123. During the rotation and transportation of the conveying rod 122 and the conveying blade 123, the direction limiting device 3 can drive the scraper 27 to move horizontally following the position of the conveying blade 123, thereby removing the scraper 27 adhering to the conveying blade The polyethylene material on the surface of 123 is scraped off, and the movement trajectory of the direction limiting device 3 and the scraper 27 is the same as the shape of the external transmission ring 25, thereby completing the effect of scraping to drive the direction limiting device 3 and the scraper 27 to rise and fall, preventing blockage during transportation and improving transportation efficiency. Therefore, a heating device 13 is provided on the outer wall of the screw conveying device 12, and the heating device 13 can be used to heat and melt the polyethylene material transported inside the screw conveying device 12, and the molten polyethylene material is transported to the inner wall of the extrusion forming device 14, and is extruded and formed by the extrusion forming device 14 to complete the production of the pipeline.

[0034] like Figures 2 to 4As shown, the screw conveying device 12 includes a conveying pipe 121 fixedly installed on the top of the base 1, a conveying rod 122 is rotatably installed inside the conveying pipe 121, a conveying blade 123 is fixedly installed on the outer wall of the conveying rod 122, and the outer diameter of the conveying blade 123 is the same as the inner diameter of the conveying pipe 121, and a scraping groove 124 is provided at the bottom of the conveying pipe 121, and the scraping groove 124 is located directly above the scraping device 2.

[0035] It should be noted that the motor is connected to the conveying rod 122, thereby driving the conveying blades 123 to rotate, so that the raw materials poured into the feeding funnel 11 are horizontally moved toward the extrusion forming device 14 through the rotation of the conveying rod 122 and the conveying blades 123, thereby realizing the function of transporting materials, and the outer diameter of the conveying blades 123 is the same as the inner diameter of the conveying pipe 121, reducing the problem of the conveying blades 123 getting stuck when transporting materials.

[0036] like Figures 4 to 5 As shown, the scraping device 2 includes a first fixed block 21 symmetrically arranged and fixedly mounted on the top of the base 1, a second fixed block 22 is fixedly mounted on the side of the first fixed block 21, a third fixed block 23 is fixedly mounted on the end of the second fixed block 22, an external transmission ring 25 is fixedly mounted on the end of the first fixed block 21, an internal transmission ring 24 is fixedly mounted on the end of the third fixed block 23, two direction limiting devices 3 are slidably mounted between the internal transmission ring 24 and the external transmission ring 25, and a scraping member 27 is fixedly mounted on the direction limiting device 3.

[0037] It should be noted that the direction limiting device 3 rotates to engage with the teeth 26 on the side wall of the external transmission ring 25, thereby driving the scraper 27 to move along the shape of the external transmission ring 25, which can drive the scraper 27 to rise and fall. The two sides of the scraper 27 have the same shape as the outer wall of the conveying blade 123, so that the scraper 27 can scrape the polyethylene material adhered to the conveying blade 123 and the conveying rod 122 to prevent blockage and improve the transportation efficiency and uniformity of material transportation.

[0038] like Figure 5 to Figure 6As shown, the direction limiting device 3 includes a limiting slider 31 slidably installed between the internal transmission ring 24 and the external transmission ring 25, a first rotating rod 32 is rotatably installed inside the limiting slider 31, a gear 33 is fixedly installed on the end of the first rotating rod 32, a first motor 36 is fixedly installed on the side of the gear 33, a second fixed plate 35 is fixedly installed on the outer wall of the first motor 36, a first fixed plate 34 is fixedly installed on the side wall of the second fixed plate 35, a limiting column 37 is fixedly installed on the side of the first fixed plate 34 close to the side of the limiting slider 31, the outer wall of the limiting column 37 is meshed with the outer wall of the external transmission ring 25, a direction limiting block 38 is fixedly installed on the side of the limiting slider 31 away from the first motor 36, and the direction limiting block 38 makes the scraper 27 on the top of the limiting slider 31 in a vertical upward position.

[0039] It should be noted that, when the first motor 36 is started, the gear 33 is driven to rotate, and the gear 33 is meshed with the teeth 26, thereby driving the limit slider 31 to slide on the outer wall of the internal transmission ring 24 and the inner wall of the external transmission ring 25, so that the scraper 27 scrapes the polyethylene material adhered to the conveying rod 122 and the conveying blade 123, and the first rotating rod 32 and the limit column 37 are stuck on the external transmission ring 25, so that the position of the first motor 36 is limited. When the first motor 36 is started, the gear 33 can be driven to rotate, and the limit slider 31 and the first rotating rod 32 are in a state of rotational connection. Therefore, the rotation of the gear 33 will not drive the limit slider 31 to rotate, and the side of the limit slider 31 away from the first motor 36 is fixedly installed with a direction limit block 38, and the direction limit block 38 is fixedly installed with the limit slider 31. The direction limit block 38 is affected by gravity and remains as Figure 6 , so that the limiting slider 31 is limited in direction during the movement, and the scraping member 27 is in a vertically upward state.

[0040] like Figures 7 and 8As shown, the scraper 27 includes a first scraper 271 fixedly mounted on the top of the limiting slider 31, a first lifting column 272 is slidably mounted inside the first scraper 271, a second lifting column 273 is fixedly mounted at the bottom of the first lifting column 272, a spring 274 is arranged on the outer wall of the second lifting column 273, the top of the spring 274 is connected to the bottom of the first lifting column 272, the bottom of the spring 274 is connected to the inner wall of the first scraper 271, a rotating block 275 is fixedly mounted on the bottom of the second lifting column 273, a rotating column 276 is rotatably mounted inside the rotating block 275, two first lifting blocks 277 are rotatably mounted on the outer wall of the rotating column 276, a telescopic rod 278 is fixedly mounted on the side wall of the first lifting block 277, a scraping rotating rod 279 is fixedly mounted on the end of the telescopic rod 278, a fan-shaped paddle 2791 is fixedly mounted on the end of the scraping rotating rod 279, and the fan-shaped paddle 2791 is rotatably mounted inside the first scraper 271.

[0041] It should be noted that, in the initial state, the first lifting column 272 is acted upon by the spring 274 and is higher than the top of the first scraper 271, so that the two symmetrically arranged fan-shaped paddles 2791 can be driven to a fully extended state. When the first scraper 271 rises and moves toward the conveying pipe 121 to a position close to the scraping groove 124, a fluororubber is provided on the scraping groove 124 to seal the inner wall of the conveying pipe 121. When the first lifting column 272 presses against the fluororubber on the scraping groove 124, the first lifting column 272 is driven to move downward, so that the fan-shaped paddle 2791 contracts to the inside of the first scraper 271, so that the first scraper 271 can be fully raised to the inside of the conveying pipe 121 until the first scraper 271 is lifted. When the top of a scraper 271 contacts the outer wall of the conveying rod 122, the fan-shaped paddle 2791 is always retracted to the inner wall of the first scraper 271. When the first scraper 271 moves out from the inner wall of the conveying pipe 121, the top of the first lifting column 272 is no longer subjected to the extrusion force, so that the first lifting column 272 extends, and the melted polyethylene material near the conveying rod 122 can be pushed toward the edge, thereby reducing the possibility of melting and agglomeration of the polyethylene material and improving uniformity. When the fan-shaped paddle 2791 contacts the inner wall of the scraping groove 124, it retracts to the inside of the first scraper 271 again, and the first scraper 271 is completely moved out from the inside of the conveying pipe 121, and the fan-shaped paddle 2791 is unfolded again.

[0042] like Figures 7 and 8 As shown, a torsion spring is provided at the connection position between the fan-shaped paddle 2791 and the inside of the first scraper 271 , and the fan-shaped paddle 2791 is symmetrically installed inside the first scraper 271 .

[0043] It should be noted that a torsion spring is provided at the connection position between the fan-shaped paddle 2791 and the inside of the first scraper 271. The fan-shaped paddle 2791 is symmetrically installed inside the first scraper 271, so that when the first scraper 271 descends, the fan-shaped paddle 2791 extends out from the inside of the first scraper 271.

[0044] like Figure 3 to Figure 4 As shown, the inner wall of the scraping groove 124 is provided with high temperature resistant fluororubber, and the fluororubber is used to seal the inner wall of the conveying pipe 121 .

[0045] It should be noted that the inner wall of the scraper groove 124 is provided with high temperature resistant fluororubber, and the fluororubber is used to seal the inner wall of the conveying pipe 121 . The fluororubber has a high temperature resistance effect, thereby preventing the material inside the conveying pipe 121 from spilling out.

[0046] like Figure 4 As shown, two second fixing blocks 22 are symmetrically arranged on the outer wall of the first fixing block 21 , and the diameter of the two second fixing blocks 22 is greater than the distance between the direction limiting block 38 and the first motor 36 .

[0047] It should be noted that the diameter of the two second fixing blocks 22 is greater than the distance between the direction limiting block 38 and the first motor 36 , so as to prevent the direction limiting device 3 from touching the second fixing block 22 and the third fixing block 23 during movement.

[0048] like Figures 4 to 6 As shown, the two side surfaces of the first scraper 271 have the same shape as the outer wall of the conveying blade 123 .

[0049] It should be noted that the two side surfaces of the first scraper 271 have the same shape as the outer wall of the conveying blade 123 , so that when the first scraper 271 rises to the inside of the conveying pipe 121 , it can clean the polyethylene material adhered to the surface of the conveying blade 123 .

[0050] like Figure 3 to Figure 4 As shown, the farthest distance between the two first fixing blocks 21 is smaller than the length of the scraping groove 124 .

[0051] It should be noted that the maximum distance between the two first fixing blocks 21 is smaller than the length of the scraping groove 124 , so that when the first scraper 271 moves, the scraping groove 124 will not interfere with the direction of the scraping member 27 .

[0052] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. An ultra-high molecular weight polyethylene pipe production device, comprising a base (1), characterized in that: A screw conveying device (12) and a heating device (13) are arranged on the top of the base (1); a feeding hopper (11) and an extrusion forming device (14) are fixedly installed at both ends of the screw conveying device (12); the screw conveying device (12) is used to convey and heat the polyethylene material; the extrusion forming device (14) is used to extrude the polyethylene material; a scraping device (2) is arranged on the top of the base (1) directly below the screw conveying device (12); a direction limiting device (3) is slidably installed inside the scraping device (2); The scraping device (2) comprises an internal transmission ring (24), an external transmission ring (25), teeth (26), and a scraping member (27). The shape of the internal transmission ring (24) is the same as that of the external transmission ring (25). The internal transmission ring (24) and the external transmission ring (25) are located in the same vertical plane. A direction limiting device (3) is slidably mounted on the inner wall of the external transmission ring (25) and the outer wall of the internal transmission ring (24). The side wall of the external transmission ring (25) has a plurality of teeth (26) in an annular array. The direction limiting device (3) meshes with the teeth (26). A scraping member (27) is arranged on the direction limiting device (3). The direction limiting device (3) drives the scraping member (27) to slide inside the screw conveying device (12). The scraping member (27) is used to scrape polyethylene material adhered to the inside of the screw conveying device (12).

2. The ultra-high molecular weight polyethylene pipe production equipment according to claim 1, characterized in that: The screw conveying device (12) comprises a conveying pipe (121) fixedly mounted on the top of the base (1); a conveying rod (122) is rotatably mounted inside the conveying pipe (121); a conveying blade (123) is fixedly mounted on the outer wall of the conveying rod (122); the outer diameter of the conveying blade (123) is the same as the inner diameter of the conveying pipe (121); a scraping groove (124) is provided at the bottom of the conveying pipe (121); and the scraping groove (124) is located directly above the scraping device (2).

3. The ultra-high molecular weight polyethylene pipe production equipment according to claim 2, characterized in that: The scraping device (2) comprises a first fixed block (21) fixedly mounted on the top of the base (1) and symmetrically arranged, a second fixed block (22) being fixedly mounted on the side of the first fixed block (21), a third fixed block (23) being fixedly mounted on the end of the second fixed block (22), an external transmission ring (25) being fixedly mounted on the end of the first fixed block (21), an internal transmission ring (24) being fixedly mounted on the end of the third fixed block (23), two direction limiting devices (3) being slidably mounted between the internal transmission ring (24) and the external transmission ring (25), and a scraping member (27) being fixedly mounted on the direction limiting device (3).

4. The ultra-high molecular weight polyethylene pipe production equipment according to claim 3, characterized in that: The direction limiting device (3) comprises a limiting slider (31) slidably mounted between an inner transmission ring (24) and an outer transmission ring (25); a first rotating rod (32) is rotatably mounted inside the limiting slider (31); a gear (33) is fixedly mounted on the end of the first rotating rod (32); a first motor (36) is fixedly mounted on the side of the gear (33); a second fixing plate (35) is fixedly mounted on the outer wall of the first motor (36); a first fixing plate (34) is fixedly mounted on the side wall of the second fixing plate (35); a limiting column (37) is fixedly mounted on the side of the first fixing plate (34) close to the limiting slider (31); the outer wall of the limiting column (37) meshes with the outer wall of the outer transmission ring (25); a direction limiting block (38) is fixedly mounted on the side of the limiting slider (31) away from the first motor (36); the direction limiting block (38) enables the scraping member (27) at the top of the limiting slider (31) to be in a vertically upward position.

5. The ultra-high molecular weight polyethylene pipe production equipment according to claim 4, characterized in that: The scraping member (27) comprises a first scraper (271) fixedly mounted on the top of the limiting slider (31); a first lifting column (272) is slidably mounted inside the first scraper (271); a second lifting column (273) is fixedly mounted on the bottom of the first lifting column (272); a spring (274) is disposed on the outer wall of the second lifting column (273); the top of the spring (274) is connected to the bottom of the first lifting column (272); the bottom of the spring (274) is connected to the inner wall of the first scraper (271); and the second lifting column (273) is fixedly mounted on the bottom of the first lifting column (272). 3) is fixedly mounted with a rotating block (275) at the bottom, a rotating column (276) is rotatably mounted inside the rotating block (275), two first lifting blocks (277) are rotatably mounted on the outer wall of the rotating column (276), a telescopic rod (278) is fixedly mounted on the side wall of the first lifting block (277), a scraping rotating rod (279) is fixedly mounted on the end of the telescopic rod (278), a fan-shaped paddle (2791) is fixedly mounted on the end of the scraping rotating rod (279), and the fan-shaped paddle (2791) is rotatably mounted inside the first scraper (271).

6. The ultra-high molecular weight polyethylene pipe production equipment according to claim 5, characterized in that: A torsion spring is provided at a connection position between the fan-shaped paddle plate (2791) and the inside of the first scraper plate (271); the fan-shaped paddle plate (2791) is symmetrically mounted inside the first scraper plate (271).

7. The ultra-high molecular weight polyethylene pipe production equipment according to claim 6, characterized in that: The inner wall of the scraping groove (124) is provided with high temperature resistant fluororubber, and the fluororubber is used to seal the inner wall of the conveying pipe (121).

8. The ultra-high molecular weight polyethylene pipe production equipment according to claim 7, characterized in that: Two second fixing blocks (22) are symmetrically arranged on the outer wall of the first fixing block (21), and the diameter of the two second fixing blocks (22) is greater than the distance between the direction limiting block (38) and the first motor (36).

9. The ultra-high molecular weight polyethylene pipe production equipment according to claim 8, characterized in that: The two side surfaces of the first scraper (271) have the same shape as the outer wall of the conveying blade (123).

10. The ultra-high molecular weight polyethylene pipe production equipment according to claim 9, characterized in that: The maximum distance between the two first fixing blocks (21) is smaller than the length of the scraping groove (124).

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