CN112549567A

CN112549567A - Clamp for metal plastic composite pipe compounding process

Info

Publication number: CN112549567A
Application number: CN202011435459.6A
Authority: CN
Inventors: 尹希伟; 肖和飞; 张新爱; 罗安明
Original assignee: Hunan Zhenhui Pipe Industry Co ltd
Current assignee: Hunan Zhenhui Pipe Industry Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-03-26

Abstract

The invention provides a clamp for a metal plastic composite pipe compounding process, which comprises a cylindrical shell and a cylindrical inner cylinder which is positioned in the shell and has a common central line, wherein a gap for inserting a pipe end of a plastic pipe to be processed is formed between the inner side surface of the shell and the outer side surface of the inner cylinder, the side surface of the inner cylinder comprises a rear chuck and a flexible expansion ring which are connected along the central line direction, and one side of the expansion ring, which is far away from the gap, is communicated with an external air supply system. The invention can realize that the expansion ring compresses and fits or loosens a circle of the circumference of the inner wall of the plastic pipe by applying and removing pressure to one side of the expansion ring so as to quickly and conveniently realize the sealing or the sealing removal of the pipe end of the plastic pipe, the flexible expansion ring is easy to obtain, the sealing and contact sealing operation is convenient and efficient, and the flexible expansion ring can be repeatedly used; the clamp is compact in structure and reliable in operation.

Description

Clamp for metal plastic composite pipe compounding process

Technical Field

The invention relates to the technical field of metal plastic composite pipe compounding processes, in particular to a clamp for a metal plastic composite pipe compounding process.

Background

The metal plastic composite pipe is a pipe which is formed by compounding an outer layer serving as a metal pipe and an inner layer serving as a plastic pipe through a certain process, and has the advantages of the metal pipe and a non-metal pipe. When the metal pipe and the plastic pipe are combined and bonded, two ends of the plastic pipe need to be clamped and sealed. However, when the pipe diameter is large, the sealing difficulty is increased, and in addition, in the production of the metal plastic composite pipe composite assembly line, the process of the equipment for sealing the two ends of the plastic pipe can be reused without affecting the performance of the plastic pipe.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a clamp for a metal plastic composite pipe compounding process, which can realize the circumferential circle pressing, fitting or loosening of the inner wall of a plastic pipe by applying pressure and removing pressure to one side of an expansion ring so as to quickly and conveniently realize the sealing or unsealing of the pipe end of the plastic pipe, the flexible expansion ring is easy to obtain, and the sealing and contact sealing operation is convenient and efficient and can be repeatedly utilized; the clamp is compact in structure and reliable in operation.

In order to achieve the purpose, the invention adopts the technical scheme that:

the clamp for the metal plastic composite pipe compounding process comprises a cylindrical shell and a cylindrical inner cylinder which is positioned in the shell and shares a center line, a gap for inserting a pipe end of a plastic pipe to be processed is formed between the inner side surface of the shell and the outer side surface of the inner cylinder, the side surface of the inner cylinder comprises a rear chuck and a flexible expansion ring which are connected along the direction of the center line, and one side, far away from the gap, of the expansion ring is communicated with an external air supply system.

As a further improvement of the above technical solution:

preferably, the expansion ring is arranged in a circle along the circumferential direction of the inner cylinder.

The two end surfaces of the inner cylinder are respectively a front chuck and an inner end cover, and the front chuck, the expansion ring, the rear chuck and the inner end cover are sequentially connected.

Preferably, the fixture further comprises an assembly shaft, the assembly shaft is located on the central line of the outer shell or the inner cylinder, an axial hole along the length direction of the assembly shaft and a radial hole vertically communicated with the axial hole are formed in the assembly shaft, the axial hole is a through hole penetrating through two ends of the assembly shaft, the radial hole is located at one end of the assembly shaft, one end of the radial hole is located in the inner cylinder, one end of the radial hole is communicated with the axial hole, and the other end of the radial hole is communicated with the inside of the inner cylinder.

Preferably, the clamp further comprises an outer end cover and an inflation screw, one end of the shell is connected with the outer end cover, the other end of the shell is in an open shape, the inflation screw is provided with a through hole penetrating through two ends of the inflation screw, an inner thread is arranged on the inner wall of one end, close to the radial hole, of the assembly shaft, an outer thread matched with the inner thread is arranged on the inflation screw, the inflation screw penetrates through the front chuck and then is connected with the assembly shaft, two ends of the through hole of the inflation screw are respectively communicated with the axial hole and the open end of the shell, and one end, located in.

Preferably, the clamp further comprises an inflation tube, the diameter of the inflation tube is equal to the aperture of the through hole of the inflation screw, and the inflation tube penetrates through the through hole and the axial hole of the inflation screw.

More preferably, the fixture further comprises a cylindrical limiting cylinder, the outer diameter of the limiting cylinder is smaller than the inner diameter of the inner cylinder, the limiting cylinder is located inside the inner cylinder, one end face of the limiting cylinder is in contact with the front chuck, the other end of the limiting cylinder is in contact with the inner end cover, a through hole in the radial direction is formed in the limiting cylinder, and one end of the through hole in the limiting cylinder is communicated with the radial hole through a cavity inside the limiting cylinder, and the other end of the through hole is communicated with one side of the expansion ring.

More preferably, the front chuck comprises an end plate and a hooked front limit hook which are integrally connected, the end plate is a circular plate covering one end face of the inner cylinder, the front limit hook is vertically connected with the circumference of the end plate, one end of the rear chuck is connected with the inner end cover, the other end of the rear chuck is provided with the hooked rear limit hook, the front limit hook and the rear limit hook are arranged in opposite directions, one end of the expansion ring is positioned between the front limit hook and the limit cylinder, and the other end of the expansion ring is positioned between the rear limit hook and the limit cylinder.

The invention has the beneficial effects that: the expansion ring can be pressed and attached to or loosened from one circle of the inner wall of the plastic pipe in the circumferential direction by applying and removing pressure to one side of the expansion ring, so that the sealing or the sealing removal of the pipe end of the plastic pipe can be quickly and conveniently realized, the flexible expansion ring is easy to obtain, and the sealing and contact sealing operation is convenient and efficient and can be repeatedly utilized; the clamp is compact in structure and reliable in operation.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

A clamp for a metal plastic composite pipe compounding process is shown in figure 1 and comprises a shell 7, an inner cylinder, an outer end cover 9, a limiting cylinder 14, an assembling shaft 1, an inflation screw 2, a bolt 6 and an inflation pipe 10.

The outer shell 7 and the inner cylinder are both cylindrical, the inner cylinder is positioned in the outer shell 7 in a concentric line, and a gap 13 for inserting a pipe end of a plastic pipe to be processed is arranged between the inner side surface of the outer shell 7 and the outer side surface of the inner cylinder. The material of the shell 7 is tetrafluoroethylene. One end of the shell 7 is connected with the outer end cover 9, and the other end is in an opening shape.

The inner cylinder comprises two end faces and a side face connected with the two end faces. The two end surfaces of the inner cylinder are respectively a front chuck 3 and an inner end cover 8, and the front chuck 3 is closer to the opening end of the outer shell 7 than the inner end cover 8, or the inner end cover 8 is closer to the outer end cover 9 than the front chuck 3. The side surface of the inner cylinder comprises a rear chuck 4 and a flexible expansion ring 5 which are connected along the central line direction of the inner cylinder, and the front chuck 3, the expansion ring 5, the rear chuck 4 and an inner end cover 8 are sequentially connected. The expansion ring 5 is arranged in a circle along the circumferential direction of the inner cylinder. The side of the expander 5 remote from the gap 13 or the inner side of the expander communicates with an external air supply.

The front chuck 3 comprises an end plate and a hooked front limiting hook which are integrally connected, the end plate is a circular plate covering one end face of the inner barrel, the front limiting hook is vertically connected with the circumference of the end plate, one end of the rear chuck 4 is connected with an inner end cover 8 through a bolt 6, the other end of the rear chuck is provided with a hooked rear limiting hook, and the front limiting hook and the rear limiting hook are arranged at intervals in opposite directions.

The limiting cylinder 14 is cylindrical. The outer diameter of the limiting cylinder 14 is smaller than the inner diameter of the inner cylinder, and the limiting cylinder 14 is located inside the inner cylinder. One end surface of the limiting cylinder 14 is contacted with the front chuck 3, and the other end surface is contacted with the inner end cover 8. The limiting cylinder 14 is provided with a through hole in the radial direction, and the through hole in the limiting cylinder 14 is positioned between the front limiting hook and the rear limiting hook.

One end of the expansion ring 5 is positioned between the front limit hook and the limit cylinder 14, the middle part of the expansion ring covers the through hole on the limit cylinder 14, and the other end of the expansion ring is positioned between the rear limit hook and the limit cylinder 14. Namely, one end of the through hole on the limiting cylinder 14 is communicated with the inner cavity of the limiting cylinder 14, and the other end is one side or inner surface side of the expansion ring 5.

Based on above-mentioned structure, preceding limit hook plays limiting displacement with back limit hook. In order to better realize the limiting function, the front limiting hook and the rear limiting hook are both provided with inward flanges, in other words, the cross sections of the front limiting hook and the rear limiting hook are both L-shaped. Correspondingly, two ends of the expansion ring 5 are provided with outward flanges, and the flanges at the two ends of the expansion ring 5 can be respectively hooked with the flanges of the front limiting hook and the flanges of the rear limiting hook, so that limiting is realized. When the inboard of the circle that expands 5 received pressure, the circle that expands 5 can extrude or expand outwards, because preceding spacing hook and the spacing effect of back spacing hook, the spacing hook before the both ends of circle that expands 5 can not deviate from and back spacing hook simultaneously.

The assembly shaft 1 is positioned on the central line of the outer shell 7 or the inner cylinder, specifically, one end of the assembly shaft 1 sequentially penetrates through the outer end cover 9 and the inner end cover 8 and then enters the inner cavity of the limiting cylinder 14, and the other end of the assembly shaft 1 can be connected with an external air supply device and an air charging device. The assembling shaft 1 is internally provided with an axial hole 11 along the length direction of the assembling shaft and a radial hole 12 vertically communicated with the axial hole 11, the axial hole 11 is a through hole penetrating through two ends of the assembling shaft 1, the radial hole 12 is positioned at one end of the assembling shaft 1, one end of the radial hole 12 is positioned in the inner cylinder, one end of the radial hole 12 is communicated with the axial hole 11, and the other end of the radial hole is communicated with the inner cylinder or the limiting cylinder 14. The radial hole 12 and the through hole on the limiting cylinder 14 are positioned on the same straight line.

Aerify screw rod 2 and have the through-hole that runs through its both ends, the one end inner wall that is close to radial hole 12 of assembly axle 1 is equipped with the internal thread, be equipped with on the aerifing screw rod 2 with internal thread complex external screw thread, aerify screw rod 2 and pass 3 back threaded connection assembly axles 1 of preceding chuck, and the both ends of the through-hole of aerifing screw rod 2 communicate the open end of axial hole 11 and shell 7 respectively, and the one end that aerify screw rod 2 is located axial hole 11 is no longer than radial hole 12 to do not block the intercommunication of radial hole 12 and axial hole 11.

The diameter of the gas tube 10 is equal to the aperture of the through hole of the gas screw 2, and the gas tube 10 passes through the through hole of the gas screw 2 and the axial hole 11.

Based on the above structure, the axial hole 11 is divided into two spaces by the air-filled tube 10, which are the portion of the axial hole 11 outside the air-filled tube 10 and the space inside the air-filled tube 10, respectively. An axial hole 11 and a radial hole 12 outside the inflation tube 10, an inner cavity of a limiting cylinder 14, a through hole of the limiting cylinder 14 and the inner side surface of the expansion ring 5 are communicated; the interior of the gas-filled tube 10 communicates with the open end of the housing 7.

The working process of the invention is as follows: the axial hole 11 outside the inflation tube 10 is communicated with an external air supply device, and the inside of the inflation tube 10 is communicated with an inflation device. The clamp at two ends extends out to insert the pipe end of a plastic pipe to be processed into the gap 13 from one side of the opening end of the shell 7, then the external gas supply device is started, gas of the gas supply device sequentially passes through the axial hole 11, the radial hole 12, the inner cavity of the limiting cylinder 14 and the through hole of the limiting cylinder 14 outside the gas-filled pipe 10 to enter the inner side of the expansion ring 5, the flexible expansion ring 5 expands under the action of air pressure and compresses the inner wall of the pipe end inserted into the gap 13, and the pipe end of the plastic pipe is sealed by combining other structures of the clamp such as the front chuck 3. When the inflation device is started when the inflation body needs to be inflated into the plastic pipe, the inflated gas enters the plastic pipe through the inflation pipe 10 and cannot leak through other parts of the end face of the plastic pipe, and when the plastic pipe needs to be completely sealed, the inflation pipe 10 only needs to be sealed. When the processing is finished and the plastic pipe needs to be taken down, the action of the air supply device is stopped, the expansion ring 5 loses the effect of air pressure and collapses, then the sealing effect on the plastic pipe is lost, the clamps at the two ends return, the plastic pipe is taken out, and the next pipe to be processed is inserted again.

Finally, it must be said here that: the above embodiments are only used for further detailed description of the technical solutions of the present invention, and should not be understood as limiting the scope of the present invention, and the insubstantial modifications and adaptations made by those skilled in the art according to the above descriptions of the present invention are within the scope of the present invention.

Claims

1. The clamp for the metal plastic composite pipe compounding process is characterized in that: the plastic pipe end machining device comprises a cylindrical shell (7) and a cylindrical inner barrel which is located in the shell (7) and is concentric with the center line, a gap (13) for inserting a pipe end of a plastic pipe to be machined is formed between the inner side face of the shell (7) and the outer side face of the inner barrel, the side face of the inner barrel comprises a rear chuck (4) and a flexible expansion ring (5) which are connected along the direction of the center line of the inner barrel, and one side, far away from the gap (13), of the expansion ring (5) is communicated with an external air supply system.

2. The clamp of claim 1, wherein: the expansion ring (5) is arranged in a circle along the circumferential direction of the inner cylinder.

3. The clamp of claim 2, wherein: the two end faces of the inner cylinder are respectively a front chuck (3) and an inner end cover (8), and the front chuck (3), the expansion ring (5), the rear chuck (4) and the inner end cover (8) are sequentially connected.

4. The clamp of claim 3, wherein: the fixture further comprises an assembly shaft (1), the assembly shaft (1) is located on the shell (7) or on the central line of the inner barrel, an axial hole (11) in the length direction of the assembly shaft and a radial hole (12) vertically communicated with the axial hole (11) are formed in the assembly shaft (1), the axial hole (11) is a through hole penetrating through two ends of the assembly shaft (1), one end, located at one end of the assembly shaft (1), of the radial hole (12) is located in the inner barrel, one end of the radial hole (12) is communicated with the axial hole (11), and the other end of the radial hole (12) is communicated with the inside of the inner barrel.

5. The clamp of claim 4, wherein: anchor clamps still include outer end cover (9) and aerify screw rod (2), and outer end cover (9) are connected to the one end of shell (7), the other end is the opening form, aerifys screw rod (2) and has the through-hole that runs through its both ends, and the one end inner wall that is close to radial hole (12) of assembly axle (1) is equipped with the internal thread, aerify on screw rod (2) be equipped with female thread fit's external screw thread, aerify screw rod (2) and connect assembly axle (1) after passing preceding chuck (3), and the both ends of the through-hole of aerifing screw rod (2) communicate the open end of axial hole (11) and shell (7) respectively, aerify the one end that screw rod (2) are located axial hole (11) and do.

6. The clamp of claim 5, wherein: the clamp further comprises an inflation tube (10), the diameter of the inflation tube (10) is equal to the aperture of the through hole of the inflation screw (2), and the inflation tube (10) penetrates through the through hole and the axial hole (11) of the inflation screw (2).

7. The clamp of claim 3, wherein: the fixture further comprises a cylindrical limiting cylinder (14), the outer diameter of the limiting cylinder (14) is smaller than the inner diameter of the inner cylinder, the limiting cylinder (14) is located inside the inner cylinder, one end face of the limiting cylinder (14) is in contact with the front chuck (3) and the other end of the limiting cylinder is in contact with the inner end cover (8), a through hole in the radial direction is formed in the limiting cylinder (14), and one end of the through hole in the limiting cylinder (14) is communicated with one side of the radial hole (12) and the other end of the through hole in the limiting cylinder (14) through the inner cavity of the limiting cylinder (14.

8. The clamp of claim 7, wherein: the front chuck (3) comprises an end plate and a hooked front limiting hook which are integrally connected, the end plate is a circular plate covering one end face of the inner cylinder, the front limiting hook is vertically connected with the circumference of the end plate, one end of the rear chuck (4) is connected with the inner end cover (8), the other end of the rear chuck is provided with the hooked rear limiting hook, the front limiting hook and the rear limiting hook are arranged in opposite directions, one end of the expansion ring (5) is positioned between the front limiting hook and the limiting cylinder (14), and the other end of the expansion ring is positioned between the rear limiting hook and the limiting cylinder (14).