Clamp assembly for composite pipe machining

Abstract

The utility model discloses a fixture component for composite pipe processing, which comprises a fixture body, an air bag and a fixture inflating rod capable of inflating and pressing a plastic pipe of a composite pipe, the fixture body is used for sealing one end of the plastic pipe, the air bag is connected to one end of the fixture body, and the air bag expands or contracts under pressure. The clamp inflation rod penetrates through the clamp body and the air bag, and the air bag applies pressure through an air pipe connected with external inflation and exhaust equipment. According to the clamp assembly, the irregular section of one end of the plastic pipe can be corrected to be round, then one end of the plastic pipe is sealed, finally the plastic pipe is inflated, the three functions of correcting the section of the plastic pipe, sealing one end of the plastic pipe and inflating the plastic pipe are integrated, the working efficiency is high, and the function is reliable and stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite pipe processing, in particular to a clamp component used for composite pipe processing. Background Art

[0002] The composite pipe is a pipe with a metal pipe as the outer layer and a plastic pipe as the inner layer, which is formed by a certain process and has the advantages of metal pipes and non-metal pipes. During compounding, the inner plastic pipe needs to be close to the outer metal pipe, and then the inner plastic pipe and the outer metal pipe are bonded together by heating. Patent application number 2020229399792 discloses a clamp used in the composite process of metal-plastic composite pipes, where each end of the plastic pipe is inserted into a gap of the clamp, and then the expansion ring in the clamp is inflated to seal the two ends of the plastic pipe. Finally, the plastic pipe is inflated and pressurized to press the plastic pipe against the inner wall of the outer metal pipe to facilitate subsequent composite processes. However, plastic pipes have a certain deformation capacity and are easily deformed by external forces during transportation and stacking, causing their cross-sections to present irregular shapes, such as Figure 1 As shown, rather than as Figure 2 Before inserting the plastic tube into the above-mentioned clamp, one end of the plastic tube needs to be manually corrected with tools such as pliers so that its irregular cross-section is corrected into a circle so that it can be smoothly inserted into the annular gap of the clamp. Obviously, the above-mentioned manual correction method is inefficient. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide a clamp group for composite pipe processing, wherein the clamp assembly can sequentially correct the irregular cross-section of one end of the plastic pipe into a circle, then seal one end of the plastic pipe, and finally inflate the plastic pipe, integrating the three functions of correcting the cross-section of the plastic pipe, sealing one end of the plastic pipe and inflating the plastic, with high working efficiency and reliable and stable functions.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A clamp assembly for composite pipe processing includes a clamp body, an airbag and a clamp inflation rod capable of inflating and pressurizing the plastic pipe of the composite pipe. The clamp body is used to seal one end of the plastic pipe. The airbag is connected to one end of the clamp body. The airbag expands or contracts under pressure. The clamp inflation rod passes through the clamp body and the airbag. The airbag applies pressure through an air pipe connected to external inflation and exhaust equipment.

[0006] As a further improvement of the above technical solution:

[0007] The clamp assembly also includes an end cover connecting tube and two end covers. The end cover connecting tube is tubular and is sleeved on the outside of one end of the clamp inflation rod extending out of the clamp body. The end cover is an annular plate structure. The two end covers are respectively fixedly connected to the two ends of the end cover connecting tube. The two ends of the airbag are respectively fixedly connected to the two end covers. The airbag, the outer surface of the end cover connecting tube and the two end covers form an inflatable and evacuable cavity.

[0008] The clamp assembly also includes two sealing rings, which are respectively connected to the two end covers, and each end of the airbag is pressed tightly between an end cover and a sealing ring.

[0009] The sealing ring is annular, and the sealing ring and the end cover on which it is located share a central axis, and the sealing ring is connected to the end cover by screws.

[0010] The clamp assembly also includes two steel wire rings, the two ends of the air bag are respectively connected to the two steel wire rings, and each steel wire ring is pressed between an end cover and a sealing ring.

[0011] The clamp assembly also includes two sealing rings, each of which is located between an end cover and a sealing ring and presses one end of the airbag.

[0012] A through hole is provided in the clamp inflation rod, through which air is inflated and pressurized in the plastic tube. The air pipe passes through the through hole and an end cover away from the clamp body in sequence and then enters the cavity.

[0013] A positioning bolt is arranged on the outer surface of the clamp inflation rod, and the end cover connecting pipe is defined between the clamp body and the positioning bolt.

[0014] The clamp assembly also includes a shrink belt, the length of which is retractable, and the shrink belt is connected to the airbag along a direction surrounding the end cover connecting tube.

[0015] The outer diameter of one end cap close to the clamp body is larger than the outer diameter of another end cap far from the clamp body, and the end cap does not block the slit on the clamp body for inserting the plastic tube.

[0016] The beneficial effects of the utility model are:

[0017] (1) The clamp assembly can sequentially correct the irregular cross-section of one end of the plastic tube into a circular shape, then seal one end of the plastic tube, and finally inflate the plastic tube. It integrates the three functions of correcting the cross-section of the plastic tube, sealing one end of the plastic tube, and infusing air into the plastic tube. It has high working efficiency and reliable and stable functions.

[0018] (2) The airbag forms a circumferential side surface of the inflatable and deflated cavity, and its two ends are supported by rigid end caps. On the one hand, the irregular cross-section of the plastic tube can be corrected by the expansion of the airbag. On the other hand, the rigid end cap support allows the airbag to be conveniently and quickly inserted into one end of the plastic tube with an irregular cross-section. The two end caps have different outer diameters, which facilitates the insertion of the airbag into the plastic tube while ensuring sufficient pressure on the plastic tube after the airbag is expanded.

[0019] (3) The two ends of the airbag are connected to the two end covers through a wire ring and a sealing ring. The connection is reliable and stable, and the sealing performance inside the cavity is ensured by the sealing ring.

[0020] (4) The overall structure of the clamp assembly is compact and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram showing that the cross section of a plastic pipe is an irregular shape.

[0022] Figure 2 It is a schematic diagram of a plastic pipe with a circular cross section.

[0023] Figure 3 It is a structural schematic diagram of an embodiment of the utility model.

[0024] Figure 4 yes Figure 3 An enlarged schematic diagram of point A.

[0025] Figure 5 yes Figure 3 An enlarged schematic diagram of point B.

[0026] Figure 6 It is a schematic diagram of an air bag of a clamp assembly of an embodiment of the utility model extending into a plastic tube.

[0027] Figure 7 It is a schematic diagram of the air bag of the clamp assembly of one embodiment of the utility model applying pressure to the plastic tube after being expanded.

[0028] Figure 8 It is a schematic diagram of the plastic tube being inserted into the clamp body after the airbag of the clamp assembly in one embodiment of the utility model corrects the cross section of one end of the plastic tube into a circle. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] A clamp assembly for processing a composite pipe, the composite pipe comprising an outer metal pipe b and an inner plastic pipe a, such as Figure 3 and Figure 4 As shown, the clamp assembly includes a clamp body 1, a clamp inflation rod 2, an air bag 3, an air pipe 4, an end cover 5, an end cover connecting pipe 6, a sealing ring 7, a wire ring 8, a sealing ring 9, a positioning bolt 10 and a shrink band 11.

[0032] The clamp body 1 is used to seal one end of the plastic tube a. The clamp body 1 is provided with an annular gap 12 and a groove 13 connected to the gap 12. After one end of the plastic tube a is inserted into the gap 12, the expansion ring in the groove 13 is inflated, and the clamp body 1 and the expansion ring as a whole achieve the sealing of one end of the plastic tube a. The clamp inflation rod 2 is installed on the clamp body 1 and passes through the clamp body 1. The clamp inflation rod 2 is provided with a through hole 21 that passes through the clamp inflation rod 2. The plastic tube a sealed at both ends can be inflated and pressurized through the through hole 21. The overall principle and structure of the clamp body 1 and the clamp inflation rod 2 can refer to the technical solution disclosed in the patent application number 2020229399792 of the applicant, which will not be repeated here.

[0033] The airbag 3, the end cap 5 and the end cap connecting tube 6 are located on the same side of the clamp body 1, specifically, on the side of the open end of the slit 12. The end cap connecting tube 6 is tubular, and the end cap connecting tube 6 is sleeved on the outside of the end of the clamp inflation rod 2 extending out of the clamp body 1. The end cap 5 is an annular plate-like structure, and is provided with two end caps 5, which are respectively fixedly connected to the two ends of the end cap connecting tube 6, and the two end caps 5 are arranged in parallel and spaced apart, and the plane where the end caps 5 are located is perpendicular to the central axis of the end cap connecting tube 6. Preferably, one end cap 5 contacts one side of the clamp body 1. Of the two end caps 5, the outer diameter of the end cap 5 close to the clamp body 1 is larger than the outer diameter of the other end cap 5 away from the clamp body 1, and the end cap 5 contacting the clamp body 1 does not block the entrance and exit of the slit 12 on the clamp body 1 for inserting the plastic tube a.

[0034] In order to prevent the end cover 5 and the end cover connecting tube 6 from moving in the length direction of the end cover connecting tube 6 , a positioning bolt 10 is provided on the outer surface of the clamp inflation rod 2 , and the end cover connecting tube 6 is confined between the clamp body 1 and the positioning bolt 10 .

[0035] The two ends of the airbag 3 are fixedly connected to the two end caps 5, so that the airbag 3, the outer surface of the end cap connecting tube 6 and the two end caps 5 form a cavity that can be inflated and deflated, and the airbag 3 forms the circumferential side wall of the cavity. Specifically, each end of the airbag 3 is fixed to the end cap 5 through a sealing ring 7, a wire ring 8 and a sealing ring 9. Figure 3 and 4 As shown, the sealing ring 9 is annular, and the sealing ring 9 and the end cap 5 on which it is located share a central axis. The sealing ring 9 is screwed to the side of the end cap 5 away from the other end cap 5. The two ends of the airbag 3 are respectively connected to the two wire loops 8 by sewing, and each wire loop 8 is pressed between an end cap 5 and a sealing ring 9, so that each end of the airbag 3 is pressed between an end cap 5 and a sealing ring 9.

[0036] In this embodiment, the material of the airbag 3 is Oxford cloth.

[0037] In order to ensure the sealing performance of the cavity, a sealing ring 7 is also arranged between each sealing ring 9 and the end cover 5 connected thereto. The sealing ring 7 contacts and presses one end of the airbag 3 located between the sealing ring 9 and the end cover 5. The wire ring 8 is closer to the clamp inflation rod 2 than the airbag 3.

[0038] The air pipe 4 is used to inflate and exhaust the interior of the cavity. One end of the air pipe 4 is connected to external inflation and exhaust equipment, and the other end passes through the through hole 21 and an end cover 5 away from the clamp body 1 in sequence and then enters the cavity.

[0039] Furthermore, in order to prevent the airbag 3 from excessively sagging when the cavity is not inflated, resulting in greater friction between the airbag 3 and the plastic tube a and damaging the airbag 3 and the plastic tube a when the airbag 3 is inserted into the plastic tube a, a shrink band 11 is connected to the airbag 3. The shrink band 11 is retractable and made of rubber. The shrink band 11 is connected to the airbag 3 along the direction around the end cover connecting tube 6. In other words, the shrink band 11 is located in the cavity, connected to the inner wall of the airbag 3, and arranged along the circumference of the cavity, such as Figure 5 shown.

[0040] Based on the above structure, the working principle and process of the utility model are as follows: the chamber is not inflated, the airbag 3 is in a contracted or collapsed state, firstly, one end of the airbag 3 of the clamp assembly is extended into the plastic tube a toward the plastic tube a, as shown in FIG. Figure 6 Then, the external inflation and exhaust equipment inflates and pressurizes the cavity through the air pipe 4, and the airbag 3 expands after being pressurized, and the volume of the cavity increases. The airbag 3 expands until it contacts the inner wall of the plastic tube a and applies pressure to it, as shown in FIG. Figure 7 As shown, the irregular cross-section of one end of the plastic tube a gradually returns to a circular shape. Then, the clamping assembly is further extended into the plastic tube a, and the end of the plastic tube a with a circular cross-section can be accurately and quickly inserted into the gap 12. Figure 8 Then, the expansion ring is inflated to seal one end of the plastic tube a. Finally, the plastic tube a is inflated and pressurized through the through hole 21 of the clamp inflation rod 2, so that the plastic tube a is closely attached to the inner wall of the metal tube b, which facilitates the smooth progress of the subsequent composite heating process.

[0041] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the utility model in detail and cannot be understood as limiting the protection scope of the utility model. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the utility model belong to the protection scope of the utility model.

Claims

1. A fixture assembly for composite pipe processing, characterized in that: The invention comprises a clamp body (1), an air bag (3) and a clamp inflation rod (2) capable of inflating and pressurizing the plastic tube of a composite tube. The clamp body (1) is used to seal one end of the plastic tube. The air bag (3) is connected to one end of the clamp body (1). The air bag (3) expands or contracts under pressure. The clamp inflation rod (2) passes through the clamp body (1) and the air bag (3). The air bag (3) applies pressure through an air pipe (4) connected to an external inflation and exhaust device.

2. The clamp assembly according to claim 1, characterized in that: The clamp assembly further comprises an end cover connecting tube (6) and two end covers (5); the end cover connecting tube (6) is tubular and is sleeved on the outside of one end of the clamp inflation rod (2) extending out of the clamp body (1); the end cover (5) is an annular plate-like structure; the two end covers (5) are respectively fixedly connected to the two ends of the end cover connecting tube (6); the two ends of the airbag (3) are respectively fixedly connected to the two end covers (5); the airbag (3), the outer surface of the end cover connecting tube (6) and the two end covers (5) form an inflatable and deflatable cavity.

3. The clamp assembly according to claim 2, characterized in that: The clamp assembly also includes two sealing rings (9), which are respectively connected to the two end covers (5), and each end of the airbag (3) is pressed between an end cover (5) and a sealing ring (9).

4. The clamp assembly according to claim 3, characterized in that: The sealing ring (9) is annular, and the sealing ring (9) and the end cover (5) on which it is located share a central axis. The sealing ring (9) is connected to the end cover (5) by means of screws.

5. The clamp assembly according to claim 3, characterized in that: The clamp assembly also includes two wire loops (8), the two ends of the airbag (3) are respectively connected to the two wire loops (8), and each wire loop (8) is compressed between an end cover (5) and a sealing ring (9).

6. The clamp assembly according to claim 3, characterized in that: The clamp assembly also includes two sealing rings (7), each sealing ring (7) is located between an end cover (5) and a sealing ring (9) and presses one end of the airbag (3).

7. The clamp assembly according to claim 2, characterized in that: A through hole (21) passing through the clamp inflation rod (2) is provided in the clamp inflation rod (2), and air is inflated and pressurized in the plastic tube through the through hole (21). The air pipe (4) passes through the through hole (21) and an end cover (5) away from the clamp body (1) in sequence and then enters the cavity.

8. The clamp assembly according to claim 2, characterized in that: A positioning bolt (10) is provided on the outer surface of the clamp inflation rod (2), and the end cover connecting pipe (6) is defined between the clamp body (1) and the positioning bolt (10).

9. The clamp assembly according to claim 2, characterized in that: The clamp assembly further comprises a shrinking belt (11) whose length is retractable. The shrinking belt (11) is connected to the airbag (3) along a direction surrounding the end cover connecting tube (6).

10. The clamp assembly according to claim 2, characterized in that: The outer diameter of an end cap (5) close to the clamp body (1) is greater than the outer diameter of another end cap (5) far from the clamp body (1), and the end cap (5) does not block the gap (12) on the clamp body (1) for inserting the plastic tube.

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