CN217239142U - A three-layer co-extrusion dry cross-linking unit - Google Patents

Abstract

The application discloses three-layer is crowded dry-type crosslinking unit altogether relates to crosslinking unit technical field, including the crosslinking unit body, the inside fixedly connected with crosslinking line tail end pipeline of crosslinking unit body, the tip fixedly connected with sealing washer of crosslinking line tail end pipeline. This application is through annular gasbag, the gas tube, the cooperation setting between structures such as inflation hole and rubber tube, annular gasbag installs the inboard at the sealing washer, when needs are changed the sealing washer, accessible gas tube is to the inside air that fills of annular gasbag, the air is after getting into annular gasbag through the inflation hole, make annular gasbag inflation under the atmospheric pressure effect, seal the space between cable and the crosslinked line tail end pipeline inner wall, the user can change the sealing washer this moment, avoided current mode as far as possible because open sealing device when changing the sealing washer, gas and water leakage, lead to the cable in the crosslinked pipeline to be useless, thereby the problem of the waste of cable has been caused.

Description

A three-layer co-extrusion dry cross-linking unit

technical field

The present application relates to the technical field of cross-connection units, in particular to a three-layer co-extrusion dry-type cross-connection unit.

Background technique

Cross-linking technology has been used in the field of low-voltage cables from the early days of its birth until it has developed into medium-voltage, high-voltage and even ultra-high-voltage fields. The production of cables with different voltage levels and the configuration of cross-linking production lines with different cross-linking methods are different. 35kV and below cross-linked cable products are mainly produced by semi-dry process, that is, the cable insulation core is cross-linked in nitrogen, and water-cooled during cooling, the core is cooled quickly, and the production efficiency is high.

As an important part of the production equipment, the sealing device, the safe operation and service life of the sealing ring will affect the normal production. With the long-term operation of the equipment, the long-term friction between the cable and the sealing ring will cause serious wear of the sealing ring. In addition, under the action of water pressure and air pressure for a long time, serious water leakage and air leakage will occur at the lower sealing end of the pipeline, resulting in nitrogen and water leakage. Insufficient supply. In the existing method, when the sealing ring is replaced, the cable in the cross-linked pipeline becomes invalid due to the leakage of gas and water due to the opening of the sealing device. The normal production cannot be performed until the air pressure and water pressure are filled to the set pressure value, resulting in cable failure. of waste.

Utility model content

In order to improve the existing method, when the sealing ring is replaced, the cable in the cross-linked pipeline is discarded due to the leakage of gas and water due to the opening of the sealing ring. The normal production cannot be performed until the air pressure and water pressure are filled to the set pressure value, resulting in the failure of the cable. The problem of waste, the present application provides a three-layer co-extrusion dry cross-linking unit.

The application provides a three-layer co-extrusion dry cross-connection unit, which adopts the following technical solutions:

A three-layer co-extrusion dry type cross-linking unit, comprising a cross-linking unit body, a cross-linking line tail pipe is fixedly connected inside the cross-linking unit body, and a seal is fixedly connected to the end of the cross-linking line tail pipe. A ring-shaped air bag is fixedly connected to the inner cavity of one end of the cross-linking line tail pipe close to the sealing ring, and an inflation tube is detachably connected to the cross-linking line tail pipe on one side of the annular air bag. , the inflatable tube runs through the cross-linking line tail pipe and the annular airbag, the inflatable tube is communicated with the inside of the annular airbag, and the end of the inflatable tube located inside the annular airbag is fixedly connected with a spherical A plug, an inflatable hole is opened on the side wall of one end of the inflatable tube that is fixedly connected to the spherical plug, and a rubber tube is sleeved on one end of the inflatable tube located inside the annular airbag, and the inner diameter of the rubber tube is Smaller than the diameter of the inflatable tube, a sealing cover is provided on one end of the inflatable tube located outside the pipe at the tail end of the cross-linking line, and the sealing cover is detachably connected to the inflatable tube.

In this embodiment, when the sealing effect of the sealing ring set on the pipe at the end of the cross-linking line decreases due to long-term friction with the cable, first open the sealing cover set on the inflation tube, and then align the output end of the external air pump with the inflation After the air enters the inside of the inflatable pipe, due to the blocking effect of the spherical plug, the air enters the inside of the inflatable hole under the action of air pressure, and is squeezed and sleeved on the inflatable hole and the outer surface of the inflatable pipe The rubber tube on the top makes the rubber tube expand under the action of air pressure, so that a gap is formed between the inner wall of the rubber tube and the outer wall of the inflatable tube. The gap between the inner walls of the end pipes is blocked, and the user can replace the sealing ring at this time, so as to avoid the leakage of gas and water due to the opening of the sealing device and the leakage of gas and water in the existing method when replacing the sealing ring. Void, thereby causing the problem of wasting cables.

Optionally, the inner side of the sealing ring is provided with a gasket, the gasket is annular, the hole diameter of the gasket is larger than the hole diameter of the sealing ring, and the gasket is connected to the end of the cross-linking line. The inner wall of the pipe is fixedly connected.

In this embodiment, a gasket is arranged on the inner side of the sealing ring to support and protect the sealing ring, and try to avoid the displacement of the sealing ring by the frictional force of the cable during the movement process, thus causing the sealing ring to lose its sealing effect. The problem.

Optionally, a groove is provided on the middle section of one end of the inflatable tube located in the inner cavity of the annular airbag, the inflatable hole is located inside the groove, the inflatable hole penetrates the inflatable tube, the The inflatable hole is communicated with the inner cavity of the inflatable tube.

In this embodiment, a groove is formed on the inflation tube, and the inflation hole is arranged inside the groove, so that a gap is left between the outer surface of the inflation hole and the inner wall of the rubber tube, so that the air can enter the rubber tube through the gap. Inside, spread the rubber tube.

Optionally, a rubber pad is fixedly connected to one end of the rubber tube away from the spherical plug, and a side of the rubber pad away from the rubber tube is fixedly connected to the inner wall of the pipe at the end of the cross-linking line.

In this embodiment, a rubber pad is provided at one end of the rubber tube away from the spherical plug, so that the rubber tube is fixedly connected to the inner wall of the pipe at the end of the cross-linking line through the rubber pad.

Optionally, a sleeve is provided on the outer surface of the inflatable tube, the sleeve is screwed with the inflatable tube, and the outer surface of the sleeve is fixedly connected to the end pipe of the cross-linking line.

In this embodiment, a sleeve is provided for fixing the inflatable tube, and the inflatable tube is screwed to the sleeve, so that the user can take out the inflatable tube from the inside of the sleeve by screwing the inflatable tube, and remove the inflatable tube in the inner cavity of the annular airbag. Air is released.

Optionally, a mounting plate is fixedly connected to one end of the sleeve close to the sealing cover, the mounting plate is attached to the outer wall of the pipe at the end of the cross-linking line, and the mounting plate is provided with screws, The screw penetrates through the mounting plate, and is screwed with the outer wall of the pipe at the end of the cross-linking line.

In this embodiment, a mounting plate is provided to increase the contact surface between the casing and the outer wall of the pipe at the end of the cross-linking line, so as to improve the stability of the casing connection. The connection method is screwed, which not only ensures stable installation, but also improves the stability of the casing connection. Moreover, it is convenient for users to carry out installation and disassembly work.

Optionally, a joint is fixedly connected to one end of the inflation tube located outside the pipe at the end of the cross-linking line, an external thread is formed on the outer surface of the joint, and the sealing cover is connected to the sealing cover through the external thread. The connectors are screwed together.

In this embodiment, a joint is provided for screwing with the sealing cover, and a sealing cover is provided for blocking the end of the gas-filled pipe located on the outer wall of the pipe at the end of the cross-linking line, so as to avoid the entry of dust and sundries in the external environment as much as possible. Inside the inflatable tube, causing the problem of blockage of the inflatable tube.

Optionally, the inner cavity of the joint is provided with an inner thread for screwing with the external inflation pipe.

In this embodiment, an inner thread is provided in the inner cavity of the joint, so that when the user is inflating, the external inflation pipe can be screwed with the joint to improve the air tightness of the connection between the inflation pipe and the joint, thereby improving the inflation efficiency.

To sum up, the beneficial effects of the present application are as follows:

In the present application, the annular air bag, the inflation tube, the inflation hole, the rubber tube and other structures are arranged in cooperation. The annular air bag is installed on the inner side of the sealing ring. When the sealing ring needs to be replaced, air can be filled into the annular air bag through the inflation tube. , after the air enters the annular air bag through the inflation hole, the annular air bag is inflated under the action of air pressure, and the gap between the cable and the inner wall of the pipe at the end of the cross-linked line is sealed. At this time, the user can replace the sealing ring, try to avoid In the existing method, when the sealing ring is replaced, the cable in the cross-linked pipeline is discarded due to the leakage of gas and water due to the opening of the sealing device, thereby causing the waste of the cable.

Description of drawings

1 is a schematic diagram of the overall connection structure of the present application;

Fig. 2 is the schematic diagram of the partial connection structure of the present application;

Fig. 3 is a schematic diagram of the connection structure of the inflatable tube, the sleeve, the mounting plate and the joint of the present application.

Description of reference numerals: 1. Cross-linking unit body; 2. Cross-linking line tail pipe; 3. Sealing ring; 4. Gasket; 5. Annular air bag; 6. Inflatable tube; Slot; 9. Inflatable hole; 10. Rubber tube; 11. Rubber pad; 12. Sleeve; 13. Mounting plate; 14. Screw; 15. Joint; 16. External thread; 17. Internal thread; 18. Sealing cover.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-3.

Please refer to Fig. 1-3, a three-layer co-extrusion dry cross-connection unit includes a cross-connection unit body 1 for cross-linking the cable, and the cross-connection unit body 1 is fixedly connected with a cross-linking line end pipe 2. A sealing ring 3 with sealing function is fixedly connected to the end of the pipe 2 at the end of the cross-linking line. An annular air bag 5 for sealing is provided in the inner cavity of one end of the pipe 2 at the end of the cross-linking line 2 close to the sealing ring 3 .

An inflatable tube 6 for inflating the inside of the annular airbag 5 is detachably connected to the cross-linking line end pipe 2 on one side of the annular airbag 5, and the inflatable pipe 6 penetrates the cross-linking line tail-end pipe 2 and the annular airbag 5. The inflatable pipe 6 communicates with the inside of the annular air bag 5 . A spherical plug 7 is fixedly connected to one end of the inflation tube 6 inside the annular air bag 5 , and the spherical plug 7 is arranged to block the end of the inflation tube 6 inside the replacement air bag 5 .

The side wall of the inflatable tube 6 fixedly connected to one end of the spherical plug 7 is provided with an inflation hole 9 for inflating the inside of the annular airbag 5, and a rubber tube 10 is sleeved on one end of the inflation tube 6 located inside the annular airbag 5. The rubber tube The inner diameter of the rubber tube 10 is smaller than the diameter of the inflatable tube 6 , so that the inner wall of the rubber tube 10 can closely fit the outer surface of the inflatable tube 6 . A sealing cover 18 is provided on one end of the inflatable tube 6 located outside the pipe 2 at the end of the cross-linking line, and the sealing cover 18 is detachably connected to the inflatable tube 6 .

When the sealing effect of the sealing ring 3 provided on the pipe 2 at the end of the cross-linking line decreases due to long-term friction with the cable, first open the sealing cover 18 provided on the inflation tube 6, and then align the output end of the external air pump with the inflation tube 6. , and inject air into the inflatable tube 6. After the air enters the inflatable tube 6, due to the blocking effect of the spherical plug 7, the air enters the inflatable hole 9 under the action of air pressure, and is squeezed and sleeved on the inflatable hole 9 and the inflatable hole 9. The rubber tube 10 on the outer surface of the inflation tube 6 causes the rubber tube 10 to expand under the action of air pressure, so that a gap is formed between the inner wall of the rubber tube 10 and the outer wall of the inflation tube 6, and the air enters the annular airbag 5 through the gap, so that the annular The airbag 5 is inflated to seal the gap between the cable and the inner wall of the pipe 2 at the end of the cross-linked line. At this time, the user can replace the sealing ring 3, which avoids opening the sealing device when replacing the sealing ring in the existing method as much as possible. , leakage of gas and water, causing the cable in the cross-linked pipeline to be scrapped, resulting in the problem of wasting cables.

Referring to FIG. 1 , the inner side of the sealing ring 3 is provided with a gasket 4, the gasket 4 is annular, the aperture of the gasket 4 is larger than that of the sealing ring 3, and the gasket 4 is fixedly connected to the inner wall of the pipe 2 at the end of the cross-linking line , A gasket 4 is arranged on the inner side of the sealing ring 3 to support and protect the sealing ring 3, and try to avoid the displacement of the sealing ring 3 by the friction force during the movement of the cable, thus causing the sealing ring 3 to lose its sealing effect. The problem.

2 and 3, a groove 8 is provided on the middle section of one end of the inflatable tube 6 located in the inner cavity of the annular airbag 5, and the inflatable hole 9 is located inside the groove 8. The inner cavity of the inflation tube 6 is communicated with each other. A groove 8 is formed on the inflation tube 6, and the inflation hole 9 is arranged inside the groove 8, so that a gap is left between the outer surface of the inflation tube 6 and the inner wall of the rubber tube 10, so that the air can enter the rubber tube through the gap. Inside 10, the rubber tube 10 is stretched.

2 and 3, a rubber pad 11 is fixedly connected to one end of the rubber tube 10 away from the spherical plug 7, and the side of the rubber pad 11 away from the rubber tube 10 is fixedly connected to the inner wall of the pipe 2 at the end of the cross-linking line. A rubber pad 11 is provided at one end of the rubber tube 10 away from the spherical plug 7 , for fixing the rubber tube 10 on the inner wall of the pipe 2 at the end of the cross-linking line through the rubber pad 11 .

2 and 3, the outer surface of the inflatable tube 6 is provided with a sleeve 12, the sleeve 12 is screwed with the inflatable tube 6, and the outer surface of the sleeve 12 is fixedly connected to the end pipe 2 of the cross-linking line. The sleeve 12 is set for fixing the inflatable tube 6, and the inflatable tube 6 is screwed with the sleeve 12, which is convenient for the user to take out the inflatable tube 6 from the inside of the sleeve 12 by screwing the inflatable tube 6, and put the annular air bag 5 inside. The air in the cavity is released.

Referring to FIG. 3 , a mounting plate 13 is fixedly connected to one end of the sleeve 12 close to the sealing cover 18 , the mounting plate 13 is attached to the outer wall of the pipe 2 at the end of the cross-linking line, and the mounting plate 13 is provided with a screw 14 , and the screw 14 penetrates The mounting plate 13, the screw 14 is screwed with the outer wall of the pipe 2 at the end of the cross-linking line, and the mounting plate 13 is set to increase the contact surface between the casing 12 and the outer wall of the pipe 2 at the end of the cross-linking line, and improve the connection of the casing 12. It adopts the connection method of screw 14 to connect, not only stable installation, but also convenient for users to install and disassemble.

Referring to FIGS. 2 and 3 , a joint 15 is fixedly connected to one end of the inflation tube 6 located outside the pipe 2 at the end of the cross-linking line. The outer surface of the joint 15 is provided with an external thread 16 , and the sealing cover 18 is connected to the joint 15 through the external thread 16 . phase screw connection. The joint 15 is set to be screwed with the sealing cover 18, and the sealing cover 18 is set to block the end of the inflation pipe 6 located on the outer wall of the pipe 2 at the end of the cross-linking line, so as to avoid the dust and debris in the external environment from entering the inflation The inside of the tube 6 causes the problem that the inflation tube 6 is blocked.

Referring to FIG. 2 , the inner cavity of the joint 15 is provided with an internal thread 17 for screwing with an external inflation pipe, and an internal thread 17 is provided in the inner cavity of the joint 15 so that the user can inflate the external inflation pipe. It is screwed with the joint 15 to improve the air tightness of the connection between the inflation pipe and the joint 15, thereby improving the inflation efficiency.

The implementation principle of the present application is as follows: when the sealing effect of the sealing ring 3 provided on the pipe 2 at the end of the cross-linking line is reduced due to long-term friction with the cable, first open the sealing cover 18 provided on the inflation pipe 6, and then seal the outer air pump. The output end is aligned with the inflatable tube 6, and air is injected into the inflatable tube 6. After the air enters the inside of the inflatable tube 6, due to the blocking effect of the spherical plug 7, the air enters the inflatable hole 9 under the action of air pressure, and is squeezed. The rubber tube 10 sleeved on the inflatable hole 9 and the outer surface of the inflatable tube 6 makes the rubber tube 10 expand under the action of air pressure, so that a gap is formed between the inner wall of the rubber tube 10 and the outer wall of the inflatable tube 6, and the air enters through the gap. Inside the annular airbag 5, the annular airbag 5 is inflated, and the gap between the cable and the inner wall of the pipe 2 at the end of the cross-linked line is sealed. At this time, the user can replace the sealing ring 3, which avoids the replacement of the existing method as much as possible. When the sealing ring is opened, the gas and water leak out, which will cause the cable in the cross-linked pipeline to be scrapped, thus causing the problem of wasting the cable.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (8)

1. A three-layer co-extrusion dry type cross-linking unit, comprising a cross-linking unit body (1), characterized in that: the cross-linking unit body (1) is fixedly connected with a cross-linking line end pipe (2) inside, A sealing ring (3) is fixedly connected to the end of the pipe (2) at the end of the cross-linking line, and an inner cavity of one end of the pipe (2) at the end of the cross-linking line close to the sealing ring (3) is fixedly connected with a sealing ring (3). An annular airbag (5), an inflatable tube (6) is detachably connected to the cross-linking line tail end pipe (2) on one side of the annular airbag (5), and the inflatable tube (6) penetrates the The pipe (2) at the end of the cross-linking line and the annular airbag (5), the inflation tube (6) is communicated with the inside of the annular airbag (5), and the inflation tube (6) is located in the annular airbag ( 5) A spherical plug (7) is fixedly connected to one end of the inner part, and an inflatable hole (9) is opened on the side wall of one end of the inflatable tube (6) to which the spherical plug (7) is fixedly connected. A rubber tube (10) is sleeved on one end of the tube (6) inside the annular airbag (5), the inner diameter of the rubber tube (10) is smaller than the diameter of the inflation tube (6), and the inflation tube ( 6) A sealing cover (18) is provided on one end outside the pipe (2) at the end of the cross-linking line, and the sealing cover (18) is detachably connected to the inflation tube (6). 2. A three-layer co-extrusion dry cross-connection unit according to claim 1, characterized in that: a gasket (4) is arranged on the inner side of the sealing ring (3), and the gasket (4) is in the form of a gasket (4). The gasket (4) has a diameter larger than that of the sealing ring (3), and the gasket (4) is fixedly connected to the inner wall of the pipe (2) at the end of the cross-linking line. 3. A three-layer co-extrusion dry cross-connection unit according to claim 2, characterized in that: a middle section of one end of the inflatable tube (6) located in the inner cavity of the annular airbag (5) is provided with There is a groove (8), the inflation hole (9) is located inside the groove (8), the inflation hole (9) runs through the inflation tube (6), and the inflation hole (9) is connected to the The inner cavity of the inflation tube (6) is communicated with each other. 4. A three-layer co-extrusion dry cross-connection unit according to claim 1, characterized in that: a rubber pad ( 11), the side of the rubber pad (11) away from the rubber tube (10) is fixedly connected to the inner wall of the pipe (2) at the end of the cross-linking line. 5. A three-layer co-extrusion dry cross-connection unit according to claim 1, characterized in that: a sleeve (12) is provided on the outer surface of the inflatable tube (6), and the sleeve (12) ) is screwed with the inflatable pipe (6), and the outer surface of the sleeve (12) is fixedly connected with the pipe (2) at the end of the cross-linking line. 6. A three-layer co-extrusion dry cross-connection unit according to claim 5, characterized in that a mounting plate (13) is fixedly connected to one end of the sleeve (12) close to the sealing cover (18). ), the mounting plate (13) is in contact with the outer wall of the pipe (2) at the end of the cross-linking line, the mounting plate (13) is provided with a screw (14), and the screw (14) penetrates the The mounting plate (13), the screw (14) is screwed with the outer wall of the pipe (2) at the end of the cross-linking line. 7. A three-layer co-extrusion dry cross-linking unit according to claim 1, characterized in that: the inflatable pipe (6) is fixedly connected at one end outside the pipe (2) at the end of the cross-linking line There is a joint (15), an external thread (16) is formed on the outer surface of the joint (15), and the sealing cover (18) is screwed with the joint (15) through the external thread (16). 8. A three-layer co-extrusion dry cross-connection unit according to claim 7, characterized in that: the inner cavity of the joint (15) is provided with an inner thread (17) for screwing with an external inflation pipe ).

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