CN115370844B - Composite pipe connection device and connection method - Google Patents

Abstract

The invention discloses a composite pipe connection device and a connection method, which relate to the technical field of pipe connection, solve the problem that the connection quality of the existing composite pipe connection cannot be guaranteed after the pipe is cut, ensure the connection length, and avoid the influence of the medium on the cut part of the composite pipe. The specific scheme is as follows: it includes a self-locking ring, a self-locking core, flanges arranged at both ends of the self-locking ring, and bolts for connecting the flanges. The self-locking ring is provided with a first channel for the medium to pass through, and the tube wall of the self-locking ring is provided with two sockets for the end of the composite pipe and the self-locking core to be inserted, and the sockets are relatively arranged at the two ends of the self-locking ring; the self-locking core is provided with two sets, and the two sets of self-locking cores are respectively inserted into different sockets, which are used for pressing the outer wall of the composite pipe to make the inner wall of the composite pipe close to the inner wall of the socket, and the self-locking core is provided with a second channel for the medium to pass through, and the first channel and the second channel are coaxially arranged and connected.

Description

Composite pipeline connecting device and connecting method

Technical Field

The invention relates to the technical field of pipe connection, in particular to a composite pipeline connection device and a connection method.

Background

The condition that the length of the pipe needs to be adjusted often occurs in the installation process of the composite pipe, but most of mechanical connection modes of the composite pipe are prefabricated in a factory to be connected on site, so that the prefabrication of the joint cannot be performed after pipe cutting in the site, and the connection of the required pipe length is ensured.

In the use process of the composite pipeline, the composite layer is of a main bearing structure and is not suitable for being contacted with a medium, so that the end face of the pipe is required to be sealed in advance when the pipe is manufactured and connected, bearing failure caused by contact between the composite layer and the medium is avoided, sealing equipment is not provided after pipe cutting on site, sealing treatment cannot be performed, and quality problems are easy to occur after the pipe after pipe cutting is connected without sealing treatment.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide a composite pipeline connecting device and a connecting method, wherein bell and spigot sockets for inserting a composite pipeline are respectively arranged at two ends of a self-locking ring, a self-locking core is allowed to be inserted, the inner wall of the composite pipeline is tightly attached to the inner wall of the bell and spigot socket by the cooperation of the self-locking core and the bell and spigot sockets, the pipe wall end part of the composite pipeline is positioned in the pipe wall of the self-locking ring, the pipe wall end part of the composite pipeline is plugged while the connection of the composite pipeline is ensured, and the problem that the connection quality (connection length and sealing of a pipe wall cutting surface) cannot be ensured after the connection of the existing composite pipeline is cut is solved.

In order to achieve the above object, the present invention is realized by the following technical scheme:

The invention provides a composite pipeline connecting device which comprises a self-locking ring, a self-locking cylinder, flanges arranged at two ends of the self-locking ring and bolts for connecting the flanges, wherein the self-locking ring is provided with a first channel for a medium to pass through, two bell sockets for the end part of a composite pipeline and the insertion of the self-locking core are arranged in the pipe wall of the self-locking ring, the bell sockets are oppositely arranged at two ends of the self-locking ring, the two sets of self-locking cores are respectively inserted into different bell sockets and are used for pressing the outer wall of the composite pipeline to tightly attach the inner wall of the composite pipeline to the inner wall of the bell socket, the self-locking core is provided with a second channel for the medium to pass through, and the first channel and the second channel are coaxially arranged and communicated.

As a further implementation mode, a groove is formed in the faucet along the circumferential direction of the faucet, and an annular sealing rubber pad is arranged in the groove.

As a further implementation mode, a stop block arranged along the annular direction of the self-locking ring is arranged between the two bell and spigot joints and used for compensating the length of the pipe section of the composite pipe and plugging the pipe wall end part of the composite pipe.

As a further implementation, the socket is arranged in the circumferential direction of the self-locking ring, the cross section of the socket gradually decreasing towards the direction approaching the stop.

As a further implementation mode, the self-locking core is of a variable cross-section pipe structure and is divided into a big end and a small end, the small end is in contact with the stop block, and the length of the self-locking core is the same as the depth of the faucet.

As a further implementation, the socket has an inner diameter that is smaller than an inner diameter of the composite pipe.

As a further implementation, the diameter of the second channel is smaller than the outer diameter of the composite pipe.

As a further implementation mode, each set of self-locking core is formed by assembling at least two lock core units, and the sections of the lock core units are arc-shaped.

In a second aspect, the present invention provides a method for connecting composite pipes, comprising:

cutting the composite pipelines to be connected on site, and sleeving a flange on each composite pipeline;

A sealing rubber cushion is respectively placed in the groove of each bell and spigot, and the end parts of two composite pipelines to be connected are respectively inserted into the bell and spigot from the two ends of the self-locking ring, so that the end parts of the composite pipelines are clung to the side walls of the stop blocks;

A set of self-locking cylinders are respectively inserted into each faucet, so that small ends of the self-locking cylinders are contacted with the stop blocks;

The two flanges are fixedly connected by bolts.

As a further implementation mode, the cutting surface of the composite pipeline is smooth and flat, and the sum of the cutting lengths of the two composite pipelines is the same as the thickness of the stop block.

The beneficial effects of the invention are as follows:

(1) According to the invention, the bell and spigot sockets for inserting the composite pipeline are respectively arranged at the two ends of the self-locking ring, the self-locking core is allowed to be inserted, the inner wall of the composite pipeline is tightly attached to the inner wall of the bell and spigot socket through the cooperation of the self-locking core and the bell and spigot sockets, the pipe wall end part of the composite pipeline is positioned in the pipe wall of the self-locking ring, the pipe wall end part of the composite pipeline is plugged while the connection of the composite pipeline is ensured, and the influence of a medium on the cutting part of the composite pipeline is effectively avoided.

(2) The invention can use the stop block to compensate the length of the composite pipe to ensure that the length requirement is met after the composite pipe is cut and connected, and can also plug the pipe wall end of the composite pipe.

(3) The self-locking ring and the self-locking core are of variable cross-section structures, the inner diameter of the bell and spigot is smaller than that of the composite pipeline, the diameter of the second channel is smaller than that of the outer diameter of the composite pipeline, the installation strength of the composite pipeline in the bell and spigot is effectively ensured, and the variable cross-section is convenient for the installation connection of the self-locking ring and the self-locking core.

(4) According to the invention, the multiple lock core units are spliced to form the tubular self-locking core with variable cross sections, and the self-locking core is arranged in the lock core units, so that the self-locking core does not need to be sleeved on a composite pipeline in advance during installation, and the use convenience of the self-locking core is greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

FIG. 1 is a schematic cross-sectional view of the overall structure of a composite pipe connection device according to one or more embodiments of the present invention (in use);

FIG. 2 is a schematic cross-sectional view of a front view of a self-locking ring in accordance with one or more embodiments of the present invention;

FIG. 3 is a schematic side view of a self-locking ring according to one or more embodiments of the present invention;

FIG. 4 is a schematic cross-sectional view of a front view of a self-locking cylinder according to one or more embodiments of the present invention;

FIG. 5 is a schematic exploded side view of a self-locking ring according to one or more embodiments of the present invention;

in the drawings, the mutual spacing or size is exaggerated for showing the positions of all parts, and the schematic drawings are used for illustration only;

Wherein, 1, self-locking ring; 2, a self-locking core, 3, a flange, 4, a bolt, 5, a sealing rubber gasket, 6, a composite pipeline, 7, a faucet, 8, a groove, 9, a stop block, 10, a first channel, 11, a second channel, 12 and a lock core unit.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

As described in the background art, the existing composite pipeline cannot predict the joint after pipe cutting on site, cannot guarantee the requirement of the length after pipeline connection, cannot seal the end face of the composite pipeline, is easy to contact with a medium to cause pressure-bearing failure, and is easy to produce quality after connection.

Example 1

In an exemplary embodiment of the present invention, as shown in fig. 1 to 5, a composite pipe connection device is proposed, which includes a self-locking ring 1, a self-locking core 2 engaged with the self-locking ring 1, flanges 3 provided at both ends of the self-locking ring, and bolts 4 for connecting the two flanges 3.

The self-locking core 2 is provided with two sets of self-locking cores 2 which are oppositely inserted at two ends of the self-locking ring 1, the flange 3 is sleeved on the composite pipeline 6, the self-locking ring 1 and the self-locking cores 2 are fixed through matching with the bolts 4, and meanwhile, the connection strength of the two composite pipelines 6 is ensured.

As shown in fig. 2-3, the self-locking ring 1 is in a tubular structure, a first channel 10 for medium to pass through is arranged at the central position of the self-locking ring 1, the first channel 10 penetrates through the self-locking ring 1, two bell sockets 7 are arranged inside the pipe wall of the self-locking ring 1, the two bell sockets 7 are oppositely arranged at two ends of the self-locking ring 1, and the outward ends of the bell sockets 7 at the two ends of the self-locking ring 1 are communicated with the outside.

The bell and spigot 7 is mainly used for inserting from lock core 2, compound pipeline 6 from the pipe wall inside of catch 1, is equipped with dog 9 between two bell and spigot 7, and dog 9 sets up along the hoop from catch 1, blocks the intercommunication between two bell and spigot 7 through dog 9, and the usable dog 9 compensates the length that compound pipeline 6 cut the pipe to satisfy length requirement after guaranteeing that compound pipeline 6 cuts the union coupling, simultaneously, can also block up compound pipeline 6 pipe wall tip.

It should be noted that the inner portion of the pipe wall of the self-locking core 1 described in this embodiment is not at the inner surface of the pipe wall, but is partially hollowed out as shown in fig. 2.

The bell and spigot 7 is of an annular variable cross-section hole structure, the bell and spigot 7 is arranged along the annular direction of the self-locking ring 1, the cross section of the bell and spigot 7 gradually becomes smaller towards the direction close to the stop block 9, and when the self-locking core 2 and the composite pipeline 6 are inserted into the bell and spigot 7, pressure can be provided for the outer wall of the composite pipeline 6 under the action of the self-locking core 2 so as to tightly attach the inner wall of the composite pipeline 6 to the inner wall (close to the inner wall of the self-locking ring 1) of the bell and spigot 7.

The socket 7 is provided with a groove 8 on the inner wall, the groove 8 is arranged along the annular direction of the socket 7, the sealing rubber cushion 5 is mainly used for installing the sealing rubber cushion 5, the sealing rubber cushion 5 is of an annular structure, and when the self-locking cylinder 2 and the composite pipeline 6 are inserted into the socket 7, the sealing rubber cushion 5 can be used for sealing a gap between the inner wall of the composite pipeline 6 and the inner wall of the socket 7 so as to prevent media from flowing into the socket 7 and avoid the damage of the media to the end part of the composite pipeline 6 after pipe interception.

It will be appreciated that the depth L of the spigot 7 is the insertion depth of the composite pipe 6, the depth of the spigot 7 is related to the caliber pressure of the composite pipe 6, and as the caliber and pressure increase, the depth of the spigot 7 is continuously increased, and can be specifically determined according to the actual design requirements without excessive limitation.

Wherein the inner diameter d of the bell and spigot 7 (the fit dimension of the self-locking ring 1 and the inner diameter of the composite pipe 6) is smaller than the inner diameter of the composite pipe 6 by 0.5-1mm, so that the composite pipe 6 is conveniently inserted into the bell and spigot 7, and sealing is also convenient.

As shown in fig. 4-5, the self-locking core 2 is of a variable cross-section pipe structure and is divided into a big end and a small end, a second channel 11 for medium to pass through is arranged in the self-locking core 2, and the diameter D of the second channel 11 is smaller than the outer diameter 6-8mm of the composite pipeline 6 so as to ensure that the composite pipeline 6 receives enough pressure and plays a role in sealing connection.

The section gradually becomes smaller from the lock core 2 towards the direction close to the stop block 9, the length of the self-locking core 2 is the same as the depth of the bell and spigot 7, and when the self-locking core 2 is inserted into the bell and spigot 7, the outer wall of the composite pipeline 6 can be extruded by the inner wall of the self-locking core 2.

Because the inner diameter of the self-locking core 2 (namely the diameter of the second channel) is smaller than the outer diameter of the composite pipeline 6, the structure with the variable cross section of the layers arranged between the self-locking core 2 and the bell and spigot 7 can facilitate the insertion of the self-locking core 2, and the use convenience and the installation speed are greatly improved.

In order to further improve the use convenience of the self-locking core 2, the self-locking core 2 is arranged to be of a combined structure, namely, the self-locking core 2 is formed by splicing at least two lock core units 12, specifically, the section of each lock core unit 12 is arc-shaped, and a plurality of lock core units 12 can be spliced to form the tubular self-locking core 2 with variable sections.

The lock core unit 12 is arranged, so that the self-locking core 2 does not need to be sleeved on the composite pipeline 6 in advance during installation, and the installation and the use of the self-locking core 2 are facilitated.

In other embodiments, in order to further improve the anti-pulling and anti-rotation capabilities of the self-locking cylinder 2 and the self-locking ring 1, a plurality of anti-sliding groove structures can be further arranged on the outer surface of the self-locking cylinder 2 along the length direction and the circumferential direction of the self-locking cylinder 2, and anti-sliding grooves are also arranged at the matched positions of the bell and spigot 7 and the self-locking cylinder 2, so that the friction force between the self-locking cylinder 2 and the self-locking ring 1 is improved, the anti-pulling capability and the anti-rotation capability of the self-locking cylinder 2 are further improved, and the self-locking cylinder 2 is prevented from rotating relatively in the bell and spigot 7.

Example 2

In another exemplary embodiment of the present invention, a method for connecting a composite pipe is provided, which specifically includes:

Firstly, pipe cutting is carried out on the composite pipelines 6 to be connected on site, so that the sum of the cut lengths of the two composite pipelines 6 is the same as the thickness of the stop block 9, and a flange 3 is sleeved on each composite pipeline 6 respectively;

The pipe cutting treatment is to cut one end of the composite pipe 6 to be butted, and the cut surface of the composite pipe 6 needs to be ensured to be smooth and flat;

A sealing rubber cushion 5 is respectively arranged in the groove 8 of each faucet 7;

the end parts of two composite pipelines 6 to be connected are respectively inserted into the bell and spigot 7 from the two ends of the self-locking ring 1, so that the end parts of the composite pipelines 6 are clung to the side walls of the stop blocks 9 to ensure accurate control of the connection length of the composite pipelines 6, and meanwhile, the inner walls of the composite pipelines 6 are contacted with the inner walls of the bell and spigot 7, and the inner walls of the composite pipelines 6 are sealed with the inner walls of the bell and spigot 7 through the sealing rubber gaskets 5;

Wherein, after two composite pipes 6 are installed in place, self-locking ring 1 is located between two flanges 3, and first passageway 10, second passageway 11 are coaxial setting and with composite pipe 6 intercommunication.

A set of self-locking cores 2 are respectively inserted into each bell and spigot 7, so that small ends of the self-locking cores 2 are contacted with the stop blocks 9, and the outer wall of the composite pipeline 6 is tightly pressed by the self-locking cores 2;

the two flanges 3 are fixedly connected by the bolts 4, the positions of the self-locking ring 1 are limited by the two flanges 3, and meanwhile, the bell and spigot 7 is blocked, so that the composite pipeline 6 is prevented from being pulled out.

Wherein, the length of the self-locking core 2 is the same as the depth of the bell and spigot 7, and when the self-locking core 2 is inserted into the bell and spigot 7, the end of the self-locking core 2 close to the flange 3 is flush with the end of the bell and spigot 7.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The composite pipeline connecting device is characterized by comprising a self-locking ring, a self-locking core, flanges arranged at two ends of the self-locking ring and bolts for connecting the flanges, wherein the self-locking ring is provided with a first channel for a medium to pass through, two bell sockets for the end part of a composite pipeline and the insertion of the self-locking core are arranged in the pipe wall of the self-locking ring, and the bell sockets are oppositely arranged at two ends of the self-locking ring;

The two flanges are fixedly connected by bolts, the positions of the self-locking rings are limited by the two flanges, and meanwhile, the faucet is blocked;

a stop block arranged along the annular direction of the self-locking ring is arranged between the two bell and spigot ports and used for compensating the length of the pipe cutting of the composite pipe and plugging the pipe wall end part of the composite pipe;

The bell and spigot is of an annular variable cross-section hole structure, the bell and spigot is arranged along the annular direction of the self-locking ring, and the cross section of the bell and spigot is gradually reduced towards the direction close to the stop block;

the self-locking cores are of variable-section pipe structures and are divided into big end ends and small end ends, the small end ends are in contact with the stop blocks, the lengths of the self-locking cores are identical to the depths of the bell and spigot sockets, each set of self-locking cores is formed by assembling at least two lock core units, and the sections of the lock core units are arc-shaped.

2. The composite pipe connecting device according to claim 1, wherein a groove is formed in the bell and spigot along the circumferential direction of the bell and spigot, and an annular sealing rubber gasket is arranged in the groove.

3. A composite pipe connection according to claim 1, wherein the socket has an inner diameter less than the inner diameter of the composite pipe.

4. A composite pipe connection according to claim 1, wherein the diameter of the second passageway is less than the outer diameter of the composite pipe.

5. A method of connecting composite pipes using a composite pipe connecting device according to any one of claims 1 to 4, characterized by the following:

cutting the composite pipelines to be connected on site, and sleeving a flange on each composite pipeline;

A sealing rubber cushion is respectively placed in the groove of each bell and spigot, and the end parts of two composite pipelines to be connected are respectively inserted into the bell and spigot from the two ends of the self-locking ring, so that the end parts of the composite pipelines are clung to the side walls of the stop blocks;

A set of self-locking cylinders are respectively inserted into each faucet, so that small ends of the self-locking cylinders are contacted with the stop blocks;

The two flanges are fixedly connected by bolts.

6. The method according to claim 5, wherein the cut surface of the composite pipe is smooth and flat, and the sum of the cut lengths of the two composite pipes is equal to the thickness of the stopper.