Device and method for preparing UHMWPE (Ultra High Molecular Weight Polyethylene) high-strength polyethylene pipe

Abstract

The invention discloses a UHMWPE high-strength polyethylene pipe preparation device and method, the UHMWPE high-strength polyethylene pipe preparation device comprises a supporting structure for extruding a pipe from a mold, and the supporting structure comprises a supporting frame; the supporting groove is formed in the center of the supporting frame in a perfect circle shape and penetrates through the supporting frame, the virtual central axis of the supporting groove is parallel to the pipe extrusion direction, and the diameter of the supporting groove is larger than the maximum outer diameter of a pipe; the virtual central axis of an output shaft of the adjusting hydraulic cylinder is perpendicular to the pipe extrusion direction, and the adjusting hydraulic cylinder is used for adjusting and controlling the position of the supporting frame in the vertical direction; before the pipe is extruded, the hydraulic cylinder is adjusted to adjust and control the position of the supporting frame so that the lowest position of the pipe can be supported upwards after the pipe is extruded. According to the invention, a plurality of rotatable inclined rotating rollers are utilized to continuously change a bearing part between a continuously extruded pipe and the rotating rollers, so that the pipe is prevented from being borne by the same part in the whole process, and further the deformation of the pipe during advancing is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of pipe extrusion, and in particular to a device and method for preparing a UHMWPE high-strength polyethylene pipe. Background Art

[0002] The extrusion die is a type of molding die. Its discharge method is achieved through extrusion. It is usually installed at the front end of the extruder and is used to make pipes or various special-shaped materials.

[0003] When the pipe is discharged from the extrusion die, it has a high temperature and a soft texture, so it needs to be placed in water to further cool down and shape. Usually, a water tank with a large area is used. In the process from the pipe being discharged to entering the water, due to the lack of support, the high temperature and soft texture gradually deform under the action of its own gravity after extrusion. Summary of the invention

[0004] The purpose of the present invention is to provide a UHMWPE high-strength polyethylene pipe preparation device and method, which supports the pipe extruded from a die to prevent it from deforming before cooling.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A UHMWPE high-strength polyethylene pipe preparation device, which contains a support structure for extruding the pipe from a die, and the support structure includes:

[0007] Support frame;

[0008] The support groove is opened in the center of the support frame in a perfect circular shape and penetrates the support frame, and its virtual center axis is parallel to the extrusion direction of the pipe, and the diameter of the support groove is larger than the maximum outer diameter of the pipe;

[0009] The hydraulic cylinder is adjusted so that the virtual center axis of its output shaft is perpendicular to the extrusion direction of the pipe, so as to adjust the position of the support frame in the vertical direction;

[0010] Before the pipe is extruded, the hydraulic cylinder is adjusted to control the position of the support frame so that the lowest part of the pipe is supported upward after the pipe is extruded.

[0011] Preferably, a roller is rotatably arranged on the inner wall of the support groove, and the outer wall of the roller supports the pipe extruded from the die to provide support, and the roller is pushed to rotate accordingly when the pipe is continuously extruded and advanced.

[0012] Preferably, the support frame is provided with two rotating grooves, which are symmetrically arranged, coaxially arranged with the support groove and the diameter of the rotating groove is larger than the diameter of the support groove, a rotating ring is slidably connected in the rotating groove, and a rotating roller is arranged between the two rotating rings.

[0013] Preferably, an inclined shaft is arranged between the two rotating rings, and the virtual center axis of the inclined shaft is inclined to the virtual center axis of the rotating ring. The two ends of the inclined shaft are respectively fixedly connected to the two rotating rings, and two limit rings are fixedly sleeved on the outer wall of the inclined shaft. The roller is slidably sleeved on the inclined shaft and is located between the two limit rings.

[0014] Preferably, one of the rotating rings in the same support frame is coaxially fixedly connected to a driven gear, the support frame is also rotatably connected to a driving gear, the support frame is also equipped with a motor, the output end of the motor is fixedly connected to a rotating shaft, the rotating shaft and the driving gear are coaxially fixedly connected, and a plurality of circumferentially equidistantly arranged rollers are arranged in the support groove.

[0015] Preferably, a sponge block is arranged in the supporting frame, and the sponge block has a fluffy porous structure. The bottom of the supporting frame is connected to a gathering pool, and the gathering pool contains clean water. The sponge block is in direct contact with the clean water and absorbs the clean water to make the sponge block moist. The roller is in direct contact with the sponge block and squeezes the sponge block. A plurality of small holes are opened on the roller, and the small holes penetrate the roller.

[0016] A method for preparing a UHMWPE high-strength polyethylene pipe includes a method for supporting a continuously extruded pipe, comprising the following steps:

[0017] A rotating roller arranged obliquely and capable of self-rotation is arranged in the forward direction of the continuously extruded tube, and the roller supports the lowest point of the tube;

[0018] The roller revolves around a virtual central axis, and the virtual central axis is the same as the advancing direction of the pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention utilizes a plurality of rotatable tilted rollers to continuously change the supporting position between the continuously extruded pipe and the rollers, thereby preventing the pipe from being supported by the same position throughout the entire process, thereby preventing the pipe from deforming while moving forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a UHMWPE high-strength polyethylene pipe preparation device proposed by the present invention;

[0022] Figure 2 This is a schematic structural diagram of a support frame in a UHMWPE high-strength polyethylene pipe preparation device proposed in the present invention;

[0023] Figure 3 This is a schematic diagram of the connection structure between the aggregation tank and the connection block in a UHMWPE high-strength polyethylene pipe preparation device proposed by the present invention;

[0024] Figure 4This is a schematic diagram of the structure of two rotating rings and a roller between the two rotating rings in a UHMWPE high-strength polyethylene pipe preparation device proposed by the present invention;

[0025] Figure 5 The present invention provides a schematic structural diagram of a sponge block and a rotating trough in a UHMWPE high-strength polyethylene pipe preparation device.

[0026] In the figure: 1. Support frame; 2. Support groove; 3. Adjustment hydraulic cylinder; 4. Roller; 5. Rotating groove; 6. Inclined axis; 7. Limiting ring; 8. Driven gear; 9. Driving gear; 10. Motor; 11. Rotating shaft; 12. Sponge block; 13. Gathering pool; 14. Connecting block; 15. Fastening bolt; 16. Rotating ring; 17. Mold; 18. Small hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Reference Figure 1 -Attached Figure 5 , a UHMWPE high-strength polyethylene pipe preparation device, which contains a support structure for extruding the pipe from a die 17, the support structure comprising:

[0029] Support frame 1;

[0030] The support groove 2 is opened in the center of the support frame 1 in a perfect circular shape and passes through the support frame 1. Its virtual central axis is parallel to the extrusion direction of the pipe. The diameter of the support groove 2 is larger than the maximum outer diameter of the pipe.

[0031] The hydraulic cylinder 3 is adjusted so that the virtual central axis of its output shaft is perpendicular to the extrusion direction of the pipe, so as to adjust the position of the supporting frame 1 in the vertical direction;

[0032] Before the pipe is extruded, the hydraulic cylinder 3 is adjusted to control the position of the support frame 1 so that the lowest part of the pipe is supported upward after the pipe is extruded.

[0033] Through the above technical solution, the pipe extruded from the die 17 will be supported by the upward supporting force at the first time, so as to avoid deformation of the pipe due to its own insufficient hardness under the action of gravity after extrusion.

[0034] A roller 4 is rotatably arranged on the inner wall of the support groove 2, and the outer wall of the roller 4 supports the pipe extruded from the die 17 to provide support. When the pipe is continuously extruded and moved forward, the roller 4 is pushed to rotate accordingly.

[0035] Through the above technical solution, the connection between the tube extruded from the die 17 and the support is transformed from the original sliding friction to rolling friction, which significantly reduces the friction resistance between the tube and the support during continuous extrusion, and further reduces the deformation of the tube due to friction.

[0036] The support frame 1 has two rotating grooves 5 symmetrically arranged. The rotating grooves 5 are coaxially arranged with the support groove 2 and the diameter of the rotating groove 5 is larger than the diameter of the support groove 2 . A rotating ring 16 is slidably connected in the rotating groove 5 , and the rotating roller 4 is arranged between the two rotating rings 16 .

[0037] An inclined shaft 6 is arranged between the two rotating rings 16. The virtual center axis of the inclined shaft 6 is inclined to the virtual center axis of the rotating ring 16. The two ends of the inclined shaft 6 are respectively fixedly connected to the two rotating rings 16. Two limit rings 7 are fixedly sleeved on the outer wall of the inclined shaft 6. The roller 4 is slidably sleeved on the inclined shaft 6 and is located between the two limit rings 7.

[0038] One of the rotating rings 16 in the same support frame 1 is coaxially fixedly connected to a driven gear 8, and the support frame 1 is also rotatably connected to a driving gear 9. The support frame 1 is also equipped with a motor 10, and the output end of the motor 10 is fixedly connected to a rotating shaft 11, and the rotating shaft 11 is coaxially fixedly connected to the driving gear 9, and a plurality of rotating rollers 4 arranged equidistantly around the circumference are arranged in the support groove 2.

[0039] Through the above technical solution, when the pipe is continuously extruded and advanced, the motor 10 is started synchronously, driving the two rotating rings 16 and the multiple inclined rollers 4 between the two rotating rings 16 to rotate about the virtual center axis of the rotating ring 16. The position where the outer wall of the roller 4 drags the pipe changes in real time, thereby avoiding the extruded pipe being supported by the lowest point of the outer ring of the pipe throughout the whole process, thereby preventing the lowest point of the pipe from deforming.

[0040] A sponge block 12 is arranged in the supporting frame 1. The sponge block 12 has a fluffy porous structure. A gathering pool 13 is connected to the bottom of the supporting frame 1. The gathering pool 13 contains clean water. The sponge block 12 is in direct contact with the clean water and absorbs the clean water to make the sponge block 12 moist. The roller 4 is in direct contact with the sponge block 12 and squeezes the sponge block 12. A plurality of small holes 18 are opened on the roller 4, and the small holes 18 penetrate the roller 4.

[0041] Through the above technical solution, when the roller 4 rotating with the virtual central axis of the swivel ring 16 squeezes the sponge block 12, the sponge block 12 at the squeezing point is subjected to the squeezing force, causing the clean water originally adsorbed therein to diverge outward, and the clean water partly diverging outward enters the small hole 18 and is sprayed toward the outer wall of the continuously extruded pipe, so as to enhance the hardness of the pipe when it is cooled.

[0042] A connecting block 14 is fixedly connected below the gathering pool 13 , and the adjusting hydraulic cylinder 3 is installed below the connecting block 14 . The output shaft of the adjusting hydraulic cylinder 3 extends upward through the connecting block 14 and is fixedly connected to the bottom of the gathering pool. The connecting block 14 is fixedly connected to the mold 17 by fastening bolts 15 .

[0043] Working principle:

[0044] The connecting block 14 is fixed on the mold 17 by tightening the bolts 15, and the adjusting hydraulic cylinder 3 is started to adjust the position of the gathering pool 13 in the vertical direction, thereby adjusting the roller 4 so that the top of the roller 4 at the lowest point of the support groove 2 coincides with the lowest point of the continuously extruded pipe;

[0045] When the continuously extruded pipe passes through the roller 4 supporting the pipe, the forward momentum will cause the roller 4 to rotate. At the same time, the motor 10 is started to rotate the driving gears 9, thereby driving the driven gears 9 to rotate synchronously and oppositely, driving the two rotating rings 16 and the multiple rollers 4 between the two rotating rings 16 to rotate, thereby avoiding the extruded pipe from being supported by the lowest point of the outer ring of the pipe throughout the whole process, preventing the lowest point of the pipe from deformation.

[0046] It should be noted that:

[0047] The mold 17 of the present application is provided with slots adapted to the fastening bolts 15 so that the fastening bolts 15 can be screwed in and tightened.

[0048] The present invention is conceived to:

[0049] The rotatable and tilted rollers 4 are used to continuously change the supporting position between the continuously extruded pipe and the rollers 4, so as to avoid the pipe being supported by the same position throughout the whole process, thereby preventing the pipe from deforming when moving forward;

[0050] At the same time, after the sponge block 12 that absorbs clean water is squeezed with the roller 4 during rotation, part of the clean water will be quickly sprayed into the support groove 2 through the small holes 18 on the roller 4 due to the squeezing force, thereby spraying all-roundly to the pipe advancing in the support groove 2, thereby pre-cooling the pipe and increasing its hardness.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A UHMWPE high-strength polyethylene pipe preparation device, characterized in that: It contains a support structure for extruding a tube from a die (17), the support structure comprising: Support frame (1); The support groove (2) is opened in the center of the support frame (1) in a perfect circular shape and penetrates the support frame (1), and its virtual center axis is parallel to the extrusion direction of the pipe. The diameter of the support groove (2) is greater than the maximum outer diameter of the pipe; An adjusting hydraulic cylinder (3) whose output shaft has a virtual central axis perpendicular to the pipe extrusion direction, is used to adjust the position of the supporting frame (1) in the vertical direction; Before the pipe is extruded, the hydraulic cylinder (3) is adjusted to control the position of the support frame (1) so that the lowest part of the pipe is supported upward after the pipe is extruded.

2. A UHMWPE high-strength polyethylene pipe preparation device according to claim 1, characterized in that: A roller (4) is rotatably arranged on the inner wall of the support groove (2), and the outer wall of the roller (4) supports the pipe extruded from the mold (17) to provide support. When the pipe is continuously extruded and moved forward, the roller (4) is pushed to rotate accordingly.

3. A UHMWPE high-strength polyethylene pipe preparation device according to claim 2, characterized in that: The support frame (1) is provided with two rotating grooves (5), the two rotating grooves (5) are symmetrically arranged, the rotating grooves (5) are coaxially arranged with the support groove (2), and the diameter of the rotating groove (5) is larger than the diameter of the support groove (2), a rotating ring (16) is slidably connected in the rotating groove (5), and the rotating roller (4) is arranged between the two rotating rings (16).

4. A UHMWPE high-strength polyethylene pipe preparation device according to claim 3, characterized in that: An inclined shaft (6) is arranged between the two rotating rings (16), and a virtual central axis of the inclined shaft (6) is arranged obliquely with respect to the virtual central axis of the rotating ring (16). The two ends of the inclined shaft (6) are respectively fixedly connected to the two rotating rings (16). Two limiting rings (7) are fixedly sleeved on the outer wall of the inclined shaft (6), and the rotating roller (4) is slidably sleeved on the inclined shaft (6) and is located between the two limiting rings (7).

5. The UHMWPE high-strength polyethylene pipe preparation device according to claim 3, characterized in that: One of the rotating rings (16) in the same support frame (1) is coaxially fixedly connected to a driven gear (8), the support frame (1) is also rotatably connected to a driving gear (9), the support frame (1) is also equipped with a motor (10), the output end of the motor (10) is fixedly connected to a rotating shaft (11), the rotating shaft (11) and the driving gear (9) are coaxially fixedly connected, and a plurality of rotating rollers (4) arranged equidistantly around the circumference are arranged in the support groove (2).

6. The UHMWPE high-strength polyethylene pipe preparation device according to claim 3, characterized in that: A sponge block (12) is arranged in the support frame (1), and the sponge block (12) is a fluffy porous structure. The bottom of the support frame (1) is connected to a gathering pool (13), and the gathering pool (13) contains clean water. The sponge block (12) is in direct contact with the clean water and absorbs the clean water to make the sponge block (12) wet. The rotating roller (4) is in direct contact with the sponge block (12) and squeezes the sponge block (12). A plurality of small holes (18) are opened on the rotating roller (4), and the small holes (18) penetrate the rotating roller (4).

7. A method for preparing UHMWPE high-strength polyethylene pipe, characterized in that: A method for supporting a continuously extruded tube is provided, the method comprising the following steps: A rotating roller (4) which is arranged obliquely and can rotate is arranged in the advancing direction of the continuously extruded pipe, and the rotating roller (4) supports the lowest point of the pipe; The roller (4) revolves around a virtual central axis, and the virtual central axis is in the same direction as the advancing direction of the pipe.

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