CN218429943U

CN218429943U - Orientation stretching device for PE (polyethylene) pipe

Info

Publication number: CN218429943U
Application number: CN202222343553.XU
Authority: CN
Inventors: 张友新; 刘秦元; 陆国强
Original assignee: Linhai Weixing New Building Materials Co Ltd
Current assignee: Linhai Weixing New Building Materials Co Ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-02-03
Anticipated expiration: 2032-09-05

Abstract

The utility model discloses a PE is orientation drawing device for tubular product, including external screw thread sleeve pipe assembly, be connected with cone arc expand head on external screw thread sleeve pipe assembly, the end connection backup pad and the cooling jacket subassembly of cone arc expand head, be equipped with the circular arc groove on the circular arc of cone arc expand head, the intercommunication has the air-out micropore on the circular arc groove, be equipped with the air-out through-hole at external screw thread connection sheathed tube tip interval, be equipped with the air vent in the backup pad, inside central air-out pipe that still is equipped with of external screw thread sleeve pipe assembly, the space of tip seals through the air inlet end cap, still be provided with mobilizable wind ring outside external screw thread connection sleeve pipe. The device has the advantages that the device realizes effective control of the temperature before and after pipe blank orientation expansion and after the orientation and orientation by moving the air ring for blowing, adjusting the air quantity, cooling the inside of the orientation device and moving the orientation stretching device back and forth, shortens the control time of the stretching temperature, and ensures the radial and axial uniform stretching of the PE pipe, thereby improving the strength of the pipe.

Description

Orientation stretching device for PE (polyethylene) pipe

Technical Field

The utility model belongs to the technical field of the tubular product contour machining, concretely relates to PE is orientation stretching device for tubular product.

Background

With the great increase of the demand of the plastic pipes and the continuous widening of the application fields of the plastic pipes, various countries also put forward higher requirements on the performance of the plastic pipes, such as material saving, and the improvement of the various aspects of the performance of the pipes is an important direction for the research of the plastic pipes. The oriented stretch enhancement technology is a new plastic pipe production technology developed in recent years, namely, the pipe is stretched and oriented in the axial direction and the circumferential direction in the production process, so that the axial and circumferential mechanical properties of the pipe are enhanced.

In the process of extruding, molding and oriented stretching of a PE pipe, stretching is preferably carried out at the temperature that crystallization begins to melt and molecular chains can move, so that the control of the temperature is particularly important for oriented stretching, the quality of the pipe is directly influenced, the axial stretching of the pipe in the prior art is easy to realize, but an oriented stretching device is usually an oriented device, the pipe with one specification is produced, the difficulty is brought to the production and the specification change of the pipe, and the production efficiency is influenced. Traditional orientation and cooling device, most are immovable, can not the back-and-forth movement, and the refrigerated optimum position is difficult to confirm, and the external cooling to the pipe billet is natural cooling, and the heat that produces can not in time be taken away when continuous production, and the cooling effect is not good. In addition, the inner cooling mostly adopts a medium as liquid cooling, the sealing structure is complex, the manufacture and the processing are difficult, the expansion of the existing orientation expansion device on the pipe is not uniform in cooling due to the defect of the structure of the orientation expansion device, the integral expansion uniformity of the pipe cannot be ensured, the wall thickness of the stretched pipe is not uniform, and the use strength of the pipe is seriously influenced.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem condition, the utility model provides a PE is orientation drawing device for tubular product solves above-mentioned technical problem.

In order to realize the purpose, the utility model discloses the technical scheme who takes does:

the utility model provides a PE is orientation drawing device for tubular product, include the external screw thread sleeve pipe assembly that forms by a plurality of external screw thread connecting sleeve pipe interconnect, movably be connected with cone arc expansion head on external screw thread sleeve pipe assembly, the one end of cone arc expansion head is connected with backup pad and cooling jacket subassembly, the terminal surface of cooling jacket subassembly passes through the sealed fixed of screw plug connection, be provided with the circular arc groove of same interval distribution on the circular arc of cone arc expansion head, the intercommunication has the air-out micropore on the circular arc groove, be provided with the air-out through-hole at external screw thread connecting sleeve pipe's tip interval, be provided with the air vent in the backup pad, still be provided with central play tuber pipe in the inside of external screw thread sleeve pipe assembly, the space between central play tuber pipe and the external screw thread sleeve pipe assembly tip seals through the air inlet end cap, still be provided with mobilizable wind ring outside external screw thread connecting sleeve pipe.

As a further technical scheme, the cooling jacket assembly is a transition cooling jacket, a plug is arranged on the external thread bushing assembly on one side of the supporting plate, the end part of the cone arc-shaped expansion head is connected with the supporting plate and the transition cooling jacket, an internal thread matched with the external thread connecting sleeve is arranged at the head part of the cone arc-shaped expansion head, and the cone arc-shaped expansion head moves forwards and backwards on the external thread connecting sleeve through rotation.

As a further technical scheme, the cooling sleeve assembly comprises a reducing arc-shaped expansion head and a reducing transition cooling sleeve, the end part of the reducing arc-shaped expansion head is connected with a reducing support plate and the reducing transition cooling sleeve, the reducing support plate is provided with an air hole, and the outer threaded sleeve assemblies on one sides of the support plate and the reducing support plate are respectively provided with a plug.

As a further technical scheme, arc grooves distributed at the same intervals are formed in the arc of the reducing arc-shaped expansion head, and air outlet micropores are communicated with the arc grooves.

As a further technical scheme, the external thread connecting sleeves which are connected are fixedly connected through internal thread connecting sleeves, the external thread connecting sleeves are connected with one another to form an external thread sleeve assembly, internal threads are arranged at two ends of the external thread sleeve assembly, the internal thread at one end is connected with the connecting sleeves, and the internal thread at the other end is used for being connected with an air inlet plug.

As a further technical scheme, an air inlet channel is formed between the external thread connecting sleeve and the central air outlet pipe, the air inlet channel is connected with an air source, and the center of the central air outlet pipe is an air outlet channel.

As a further technical scheme, the air ring is a movable cooling air ring, an air inlet pipe connector is arranged on the side face of the air ring and connected with a fan through an air inlet pipe, and a temperature sensor is further arranged on the air ring and used for monitoring the temperature of the tube blank.

As a further technical scheme, the diameter of the air outlet micro-hole is smaller than the size of the slot of the arc slot.

As a further technical scheme, the front end of the device is connected with an extruder to produce a tube blank, and the rear end of the device is provided with a tractor to drive the tube blank to move for oriented stretching.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) Through the blowing and the air volume adjusting of the air ring, the outer surface of the tube blank can be cooled on the optimal temperature position node in a controlled manner, the cooling time is shortened, the rapid cooling is realized, the internal cooling is carried out by the source blower in the orientation device, the double-side cooling is realized, the cooling effect is obviously improved, and the defect of uneven cooling caused by natural external cooling is overcome.

2) The external thread connecting sleeve enables the orientation stretching device to move back and forth, so that the temperature of the pipe blank before and after the pipe blank is oriented and expanded by external cooling and internal cooling is effectively controlled, and the problem that the PE pipe orientation stretching temperature is difficult to control quickly is solved.

3) The adjacent external thread connecting sleeves are connected through the internal connecting thread sleeve, so that the whole thread sleeve is prolonged, the moving range of the orientation stretching device is larger, and the temperature of the blank before and after orientation expansion is controlled better.

4) When the pipe passes through the arc-shaped expansion head, the inner wall of the pipe clings to the outer wall of the orientation stretching arc-shaped expansion head to move, the contact area of the pipe and the arc-shaped expansion head is large when the pipe is stretched, a layer of cooling air film is formed between the pipe and the outer diameter of the orientation stretching device due to the design of a plurality of air outlet micropores, the pipe is further cooled, the stretching temperature time is shortened, the radial and axial uniform stretching of the PE pipe is guaranteed, and the strength of the pipe is improved.

5) The orientation stretching device is of a replaceable structure according to different specifications, the transition cooling sleeve connected to one end of the cone arc expansion head is detached, and the reducing arc expansion head, the reducing support plate and the reducing transition cooling sleeve are installed, so that the reducing orientation stretching of the PE pipe is realized.

Drawings

FIG. 1 is a schematic structural view of an oriented stretching device for PE pipes according to the present invention;

FIG. 2 is a schematic structural view of an orientation stretching device for connecting the reducing PE pipe in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the cone arc-shaped expansion head of the present invention;

fig. 4 is a partially enlarged view of the air outlet micro-holes in fig. 3;

fig. 5 is a schematic structural view of the external thread bushing of the present invention;

FIG. 6 is a cross-sectional view of FIG. 5;

fig. 7 is a schematic sectional structural view of the female connecting sleeve of the present invention;

FIG. 8 is a schematic cross-sectional view of the connecting reducing arc-shaped expansion head of FIG. 2;

in the figure: 1. a wind ring; 2. an air inlet pipe connecting port; 3. a conical arc-shaped expansion head; 4. a support plate; 5. a transition cooling jacket; 6. a threaded plug; 7. connecting a sleeve; 8. the external thread is connected with the sleeve; 9. an air outlet through hole; 10. the internal thread is connected with the sleeve; 11. air outlet micropores; 12. an arc groove; 13. a plug; 14. a central air outlet pipe; 15. an air inlet plug; 16. an air inlet channel; 17. an air outlet channel; 18. a reducing arc-shaped expansion head; 19. a variable diameter support plate; 20. a reducing transition cooling jacket; 21. and (4) a vent hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the disclosed embodiments are merely exemplary of the invention, and are not intended to limit the invention to the precise embodiments disclosed. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-2, an oriented stretching device for PE pipes comprises an external threaded sleeve assembly formed by interconnecting a plurality of external threaded connecting sleeves 8, wherein a cone arc-shaped expanding head 3 is movably connected to the external threaded sleeve assembly, the end of the cone arc-shaped expanding head 3 is connected to a support plate 4 and a transition cooling jacket 5, and 2-6 plug threaded holes are distributed on one end surface of the transition cooling jacket 5 and are connected, sealed and fixed by a threaded plug 6. Arc grooves 12 which are distributed at the same intervals are arranged on the arc of the conical arc-shaped expanding head 3, and air outlet micropores 11 are communicated with the arc grooves 12; air outlet through holes 9 are formed in the end portion of the external threaded connection sleeve 8 at intervals, air vents 21 are formed in the supporting plate, a central air outlet pipe 14 is further arranged inside the external threaded sleeve assembly, a gap between the central air outlet pipe 14 and the end portion of the external threaded sleeve assembly is sealed through an air inlet plug 15, and a movable air ring 1 is further arranged outside the external threaded connection sleeve 8.

In order to enable the orientation stretching device to move forwards and backwards, the cone arc-shaped expansion head 3 is connected to the threads of the external thread connecting sleeve 8, the end part of the cone arc-shaped expansion head 3 is provided with internal threads and external threads, the internal threads are connected with the supporting plate 4, the external thread connecting transition cooling sleeve 5 can form a connecting integral body, the cone arc-shaped expansion head and the supporting plate 4 can be connected into a whole to move forwards or backwards in a rotating mode along the external threads of the external thread connecting sleeve 8, and the cone arc-shaped expansion head and the supporting plate 4 can also be connected into a whole to move forwards or backwards in a rotating mode along the external threads of the external thread connecting sleeve 8. The integrated orientation stretching device which forms the connection is rotated to move forwards or backwards, so that the orientation device can accurately control various process parameters of the tube blank.

Carry out fixed connection through female connection sleeve 10 between two external screw thread adapter sleeve 8, the external screw thread adapter sleeve 8 structure is as shown in fig. 5 and fig. 6, and female connection sleeve 10 both ends have the internal thread, and its structure is as shown in fig. 7, and a plurality of external screw thread adapter sleeve 8 interconnect constitute external screw thread sleeve subassembly, and the both ends of external screw thread sleeve subassembly are provided with the internal thread, and the internal thread of one end links to each other with adapter sleeve 7, and other end internal thread is used for connecting air inlet end cap 15. The center of the central air outlet pipe 14 is provided with a channel, one end of the central air outlet pipe is in threaded connection with a source machine head, a concave platform (not marked in the figure) and an air inlet plug 15 are arranged at the other end of the central air outlet pipe, and the convex platform has a limiting effect on the air inlet plug 15.

As shown in fig. 1-2, the air ring 1 is a movable cooling air ring, the air ring 1 is provided with 2-6 air inlet pipe connectors 2, the air inlet pipe connectors 2 are connected to air inlet hoses, the air inlet hoses are connected to air outlets of fans, and the air ring 1 is further provided with a temperature sensor for monitoring the temperature of the tube blank. The temperature of the tube blank during orientation stretching is controlled by adjusting the blowing quantity of the movable cooling air ring, so that the outer surface of the tube blank is cooled at the optimal temperature position node, and rapid and uniform cooling is realized. Meanwhile, the size of the air ring is matched with the diameter of the pipe blank, and the inner diameter of the air ring is 1.5-2.5 times of the diameter of the machine head.

As shown in fig. 1, an air inlet channel 16 is formed by the external thread connecting sleeve 8 and the central air outlet pipe 14, the internal cooling air of the air inlet channel 16 comes from the cold air of the air blower, the center of the central air outlet pipe 14 is an air outlet channel 17, the cooling air enters the inner cavity of the cone arc-shaped expansion head 3 through the air inlet channel 16 arranged on the extruder head, passes through the air vent 21 arranged on the support plate 4, enters the inner cavity of the transition cooling jacket 5 to cool the tube blank until the whole tube cavity is filled, and then discharges the continuous hot air through the air outlet channel 17. The balance of external cooling and internal cooling on the double-side cooling of the tube blank is realized by adjusting the blowing quantity of the air blower.

The utility model discloses an external screw thread connection sleeve 8's its one end screw thread radially is equipped with 3-8 air-out through-hole 9 in the same interval, lets in the cooling air in cone arc expands first 3 and 5 die cavities of transition cooling jacket through air-out through-hole 9. Meanwhile, the external thread connecting sleeve 8 connected with the internal thread connecting sleeve 10 can replace pipes with different specifications, the transition cooling sleeve 5 is detached, and the reducing arc-shaped expanding head 18, the reducing supporting plate 19 and the reducing transition cooling sleeve 20 are sequentially connected, so that the back and forth movement of the post-reducing oriented stretching device is realized.

As shown in fig. 3, arc grooves 12 are arranged in parallel at equal intervals of 2-6 on the arc of the cone arc-shaped expanding head 3, each row of arc grooves 12 is provided with 6-36 air outlet micropores 11, the air outlet micropores 11 are shown in an enlarged schematic view in fig. 4, and the diameter of the air outlet micropores 11 is smaller than the size of the grooves of the arc grooves. Because the cone arc-shaped expansion head 3 is arc-shaped, the contact area with the cone arc-shaped expansion head 3 is large when the tube blank is stretched, the cooling effect is good, meanwhile, the design of the plurality of air outlet micropores 11 plays a role in further cooling the tube blank, a layer of cooling air film is formed between the tube blank and the outer diameter of the orientation stretching device, the stretching temperature time is shortened, the radial and axial uniform stretching of the PE tube is ensured, and the strength of the tube is improved.

As shown in fig. 8, two ends of the reducing arc-shaped expanding head 18 are provided with internal threads, one end of each internal thread is connected with the cone arc-shaped expanding head 3, the other end of each internal thread is connected with a reducing support plate 19 and a reducing transition cooling jacket 20, and 2-4 thread plugs 6 are uniformly distributed on the end plane of the reducing transition cooling jacket 20. The arc of the reducing arc-shaped expansion head 18 is provided with 2-6 arc grooves 12 with the same interval, each arc groove 12 is internally provided with 6-38 air outlet micropores, the diameter of each air outlet micropore 11 is smaller than that of each arc groove 12, and the plurality of air outlet micropores 11 play a role in further cooling the pipe blank by adopting the technical scheme, so that the stretching temperature time is shortened.

The utility model discloses an implementation process and principle of PE is orientation drawing device for tubular product, as shown in figure 1-2, during implementation, the material extrudes the pipe from the die of the aircraft nose, the pipe is through the inside inlet air channel 16 of orientation drawing device and the outer wind ring 1 blow to the inside and outside surface cooling of pipe blank, make the inside and outside control by temperature change of pipe obtain cooling balance, and through the internal thread that external thread connecting sleeve 8 both ends were equipped with, one end is connected with connecting sleeve 7, the other end has the connection internal thread connecting sleeve 10 of air-out through-hole 9, internal thread connecting sleeve 10 connects two adjacent external thread connecting sleeve 8, constitute external thread sleeve subassembly; the other end of the external thread sleeve pipe assembly is connected with an air inlet plug 15, and plugs 13 are arranged on the external thread sleeve pipe assemblies on one sides of the supporting plate 4 and the reducing supporting plate 19 to play roles in sealing and positioning; the cooling air is filled in the cavity through the air inlet channel 16 by the air outlet through hole 9 of the external thread connecting sleeve 8 and the air vent 21 of the supporting plate 4, and the cooling air filled in the cavity is discharged from the air outlet of the machine head connected with the source through the air outlet channel 17 of the central air outlet pipe 14. The end of the central air outlet pipe 14 is provided with a clamping groove (not marked in the figure), and the clamping groove is matched and connected between the air inlet plug 15 and the external thread connecting sleeve 8 to form an air inlet channel 16 and an air outlet channel 17.

When different pipe specifications need to be replaced, the transition cooling sleeve 5 is disassembled, and the reducing arc-shaped expansion head 18, the reducing support plate 19 and the reducing transition cooling sleeve 20 are sequentially connected, so that the reducing oriented stretch PE pipes with different specifications are realized. In order to produce oriented drawn pipes of a desired high quality, it is important to control the process parameters such as temperature, draw ratio, draw speed, etc. during the draw orientation. When the stretching temperature is properly reduced at a given stretching ratio and stretching speed, the molecular stretching deformation is increased, the viscosity is reduced, the orientation degree is improved, but the mobility of molecular chain segments is reduced due to too low temperature, the orientation is not facilitated, and the tube blank is easy to break due to too high temperature. In addition, the pipe after the oriented stretching should be rapidly cooled to maintain the orientation degree of the polymer chains.

The utility model discloses a remove the wind ring and blow and adjust the amount of wind size and to the cooling of orienting device inside and outside, and to the back-and-forth movement of orienting stretching device, before having realized the pipe blank orientation extension, the effective control of expansion orientation back temperature, the difficult problem of PE tubular product orientation stretching temperature control has been solved, the arc expands first radial multichannel air-out micropore that is equipped with, it is bigger with the arc first area of contact that expands during the pipe blank is tensile, stretching temperature's control time has been shortened, radial and axial uniform stretching to PE tubular product has been guaranteed, thereby tubular product intensity has been improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a PE is orientation drawing device for tubular product, a serial communication port, include the external screw thread sleeve pipe assembly that forms by a plurality of external screw thread connecting sleeve pipe (8) interconnect, movably be connected with cone arc expand head (3) on the external screw thread sleeve pipe assembly, the end connection of cone arc expand head (3) has backup pad (4) and cooling jacket subassembly, the terminal surface of cooling jacket subassembly passes through screw plug (6) connection sealing fixed, be provided with circular arc groove (12) of the same interval distribution on the circular arc of cone arc expand head (3), the intercommunication has air-out micropore (11) on circular arc groove (12), the tip interval at external screw thread connecting sleeve pipe (8) is provided with air-out through hole (9), be provided with air vent (21) on backup pad (4), still be provided with central play tuber pipe (14) in the inside of external screw thread sleeve pipe assembly, the space between central play tuber pipe (14) and the external screw thread sleeve pipe assembly tip seals through air inlet plug (15), still be provided with mobilizable wind ring (1) outside external screw thread connecting sleeve pipe (8).

2. An oriented stretching device for PE pipe material according to claim 1, wherein the cooling jacket assembly is a transition cooling jacket (5), a plug (13) is arranged on the external threaded sleeve assembly on one side of the support plate (4), the end of the cone arc-shaped expansion head (3) is connected with the support plate (4) and the transition cooling jacket (5), the head of the cone arc-shaped expansion head (3) is provided with an internal thread matched with the external threaded connecting sleeve (8), and the cone arc-shaped expansion head can advance and retreat on the external threaded connecting sleeve (8) through rotation.

3. The oriented stretching device for the PE pipe according to claim 1, wherein the cooling jacket assembly comprises a reducing arc-shaped expansion head (18) and a reducing transition cooling jacket (20), the end of the reducing arc-shaped expansion head (18) is connected with a reducing support plate (19) and the reducing transition cooling jacket (20), the reducing support plate (19) is provided with an air vent (21), and the outer threaded sleeve assemblies on one sides of the support plate (4) and the reducing support plate (19) are provided with plugs (13).

4. The oriented stretching device for the PE pipe as claimed in claim 3, wherein the arc of the reducing arc-shaped expanding head (18) is provided with arc grooves (12) which are distributed at the same intervals, and the arc grooves (12) are communicated with air outlet micropores (11).

5. An oriented draw-off gear for PE pipe material according to claim 1, wherein the connected external screw thread connecting sleeves (8) are fixedly connected through an internal screw thread connecting sleeve (10), a plurality of external screw thread connecting sleeves (8) are connected with each other to form an external screw thread sleeve assembly, internal screw threads are arranged at two ends of the external screw thread sleeve assembly, the internal screw thread at one end is connected with the connecting sleeve (7), and the internal screw thread at the other end is used for connecting an air inlet choke plug (15).

6. The oriented stretching device for the PE pipe as claimed in claim 1, wherein an air inlet channel (16) is formed between the external thread connecting sleeve (8) and the central air outlet pipe (14), the air inlet channel (16) is connected with an air source, and the center of the central air outlet pipe (14) is an air outlet channel (17).

7. The oriented stretching device for the PE pipe as claimed in claim 1, wherein the air ring (1) is a movable cooling air ring, an air inlet pipe connecting port (2) is arranged on the side surface of the air ring (1) and is connected with a fan through an air inlet pipe, and a temperature sensor is further arranged on the air ring (1) to monitor the temperature of the pipe blank.

8. The oriented stretching device for the PE pipe as claimed in claim 1, wherein the diameter of the air outlet micro-holes (11) is smaller than the size of the circular arc grooves (12).

9. The oriented stretching device for the PE pipe as claimed in claim 1, wherein the front end of the device is connected with an extruder to produce a pipe blank, and the rear end of the device is provided with a tractor to drive the pipe blank to move for oriented stretching.