CN211398860U - Clamp formula annular pipe connects flexible line connection structure - Google Patents

Abstract

The utility model discloses a flexible pipe connection structure of a clamp-type annular pipe joint, which comprises a clamp and a sealing rubber ring. A sealing groove in the middle, the clamp is set at the connection of the two pipes, the outer circumference of the pipe near the end is provided with a positioning ring, and the distance between the two positioning grooves on the clamp is not less than the distance between the positioning ring on the pipe and the end of the pipe. Twice, the two positioning grooves are used for clamping with the positioning rings on the two pipes respectively, and the sealing groove is provided with a sealing rubber ring. The advantages and beneficial effects of the utility model: the sealing effect is good, compared with the flange, the larger the pipe diameter and the higher the pressure, the more prominent the advantages; there is a gap between the clamp and the pipe end, and the adjacent two end pipes are allowed to have 2°～3° turning angle. After the steel pipes are connected, there is a gap between the pipe ends of the two steel pipes, allowing the pipe to move axially, which can adapt to the expansion and contraction of the pipe; the rubber ring connection between the pipes can effectively reduce the mechanical vibration by more than 70%.

Description

A clamp-type annular pipe joint flexible pipe connection structure

technical field

The utility model relates to the field of pipe connection, in particular to a flexible pipe connection structure of a clamp-type annular pipe joint.

Background technique

Flange connection is a rigid connection, and a compensator must be installed on the pipeline to solve the damage caused by various stresses in the pipeline system, enhance the flexibility of the system, and ensure the safe operation of the pipeline. The clamp-type flexible pipe connection technology has been widely used in coal, electric power, construction and fire protection systems in my country. Compared with flange connection, it has a reasonable structure, high strength and self-sealing effect. The connecting pipe is in a flexible state and is easy to install and use. , has a certain promotion value in the oil processing equipment.

SUMMARY OF THE INVENTION

The purpose of the utility model is to overcome the defects in the prior art and provide a flexible pipe connection structure of a clamp-type annular pipe joint.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

A clamp-type annular pipe joint flexible pipe connection structure includes a clamp and a sealing rubber ring; the inner surface of the clamp is provided with a pair of positioning grooves close to the ends on both sides and a sealing groove in the middle arranged along the circumferential direction , the clamp is arranged at the connection of the two pipes, the outer circumference of the pipe near the end is provided with a positioning ring, and the distance between the two positioning grooves on the clamp is not less than twice the distance between the positioning ring on the pipe and the end of the pipe. The positioning grooves are used for clamping with the positioning rings on the two pipes respectively to prevent the pipes from being separated from the clamps, and the gap between the two pipes is in the sealing groove; the sealing groove is provided with a sealing rubber ring.

The middle part of the sealing rubber ring is attached to the surface of the sealing groove of the clamp, and the two ends are bent and attached to the surface of the pipe, forming a C shape with the middle part.

The width of the positioning groove is greater than the width of the positioning ring, the distance between the two positioning grooves on the clamp is slightly greater than twice the distance between the positioning ring on the pipe and the end of the pipe, and there is a gap between the ends of the two pipes in the clamp. There can be a small amount of movement in the clamp, which can adapt to the expansion and contraction of the pipe. There is also a gap between the clamp and the end of the pipe, and the two adjacent end pipes are allowed to have a turning angle of 2° to 3°.

The positioning ring is a steel belt with annular protrusions attached to the pipeline.

The clamp is composed of two semicircular bodies, and the two bodies are fastened by bolts.

Before installation, first put the sealing rubber ring on the pipe, then attach the clamp and bolt, the medium in the pipe enters the rubber ring, and use the pressure of the medium to press the rubber ring on the pipe end to prevent the medium from leaking out. The pressure of the medium acts on the inner cavity of the clamp through the rubber ring. Rubber ring sealing mechanism, the structure of the sealing rubber ring is "C" shape, the elasticity of the rubber ring can play a certain sealing effect on the pipeline. When the clamp is installed, the height of the apron is higher than the height of the pipe and the clamp. Due to the limitation of the inner space of the clamp, the apron is further squeezed, and the internal pressure generated spreads over the entire surface of the apron, and the sealing effect is further enhanced. When there is medium in the pipeline, the medium enters the "C"-shaped cavity and reacts on the sealing lip of the rubber ring, which increases the adhesion force between the rubber ring and the pipeline, thereby achieving self-sealing effect. The greater the fluid pressure in the pipeline, the greater the pressure of the rubber ring, and the better the sealing performance.

The difference between the clamp seal and the flange seal is that the flange seal works by the gasket being pressed by the bolt. Because the tightening force of the bolts is difficult to achieve uniform over the entire circumference, the fluid running in the pipeline can easily destroy the existing balance. Especially after increasing the pressure, the problem is more prominent, running, running, dripping and leaking are serious. In the clamp seal, the clamp seals the rubber ring at the interface of the pipe, and is completely pressed on one side. When the pipe is under the pressure of the fluid, the inner surface of the rubber ring will also be stressed, and it will be more tightly attached to the contact surface, resulting in a better sealing effect.

The advantages and beneficial effects of the utility model;

1. The working state of the clamp is equivalent to a pressurized container. The axial force of the medium is completely borne by the clamp, and the bolt only bears the radial force of the clamp. Due to the limited width of the sealing ring, the radial force is far less than the axial force. , When the flange is connected, the bolt bears all the axial force and the compression force of the gasket;

2. The sealing effect depends on the pressing force of the medium in the pipeline on the rubber ring. The greater the pressure, the better the sealing performance. In order to prevent medium leakage when there is no pressure, the inner diameter of the rubber ring should be smaller than the outer diameter of the pipe end interface. The larger the diameter, the higher the pressure, and the more prominent the advantages;

3. There is a gap between the clamp and the pipe end, and the pipe can have a small amount of movement in the clamp. Therefore, two adjacent end pipes are allowed to have a rotation angle of 2° to 3°. After the steel pipes are connected, there is a gap between the pipe ends of the two steel pipes, allowing the pipe to move axially, which can adapt to the expansion and contraction of the pipe; the rubber ring connection between the pipes can effectively reduce the mechanical vibration by more than 70%.

4. When the pipeline needs to be turned over, it is only necessary to remove the 4 bolts of the joint to turn it at any angle, without cutting and welding, saving a lot of auxiliary work and costs, reducing labor intensity and shortening the construction period. Compared with flange connection, the work efficiency is improved by 6 to 8 times, and the maintenance workload is very small.

Description of drawings

1 is a schematic structural diagram of a flexible pipe connection structure of a clamp-type annular pipe joint provided by the implementation of the present invention.

Detailed ways

The present utility model will be further described in detail below through the accompanying drawings and specific embodiments.

As shown in FIG. 1 , a flexible pipe connection structure of a clamp-type annular pipe joint includes a clamp 1 and a sealing rubber ring 2; The positioning groove 11 and a sealing groove 12 in the middle, the clamp is arranged at the connection of the two pipes 4, the outer circumference of the pipe 4 near the end is provided with a positioning ring 3, and the distance between the two positioning grooves 3 on the clamp is not less than the pipe Twice the distance from the upper positioning ring to the end of the pipe, the two positioning grooves 11 are used for clamping with the positioning rings 3 on the two pipes 4 respectively to prevent the pipes 4 from detaching from the clamps 1, and the gap between the two pipes is at in the sealing groove; the sealing groove is provided with a sealing rubber ring.

The middle part of the sealing rubber ring 2 is attached to the surface of the sealing groove 12 of the clamp, and the two ends are bent and attached to the surface of the pipe 4, forming a C shape with the middle part.

The width of the positioning groove 11 is greater than the width of the positioning ring 3, the distance between the two positioning grooves 11 on the clamp 1 is slightly greater than twice the distance between the positioning ring 3 on the pipe and the end of the pipe, and the distance between the two pipe ends in the clamp 1 is slightly larger than that of the pipe. There is a gap between the pipes, and the pipe can have a small amount of movement in the clamp, which can adapt to the expansion and contraction of the pipe. There is also a gap between the clamp and the pipe end, and the adjacent two end pipes are allowed to have a 2° to 3° angle of rotation.

The positioning ring 3 is a steel belt with annular protrusions attached to the pipe 4 .

The clamp 1 is composed of two semicircular bodies, and the two bodies are fastened by bolts.

The flexible pipe connection structure of the clamp type flexible pipe joint of the utility model is that the clamp is clamped on the positioning ring of the pipe to ensure that it will not be pulled apart when carrying enough axial tension. Generally, the clamp with the pipe diameter below DN426 The clamp only needs 2 bolts; the clamp with a pipe diameter above DN426 needs 4 bolts to be locked. Compared with flanges, the fastening is simple, convenient and reliable. The pipes connected with the clamps are left with a nozzle gap to ensure the flexibility of the pipes and relax the stress of the steel pipes. The sealing of the nozzle gap is realized by the clamped rubber ring.

Before installation, first put the sealing rubber ring on the pipe, then attach the clamp and bolt, the medium in the pipe enters the rubber ring, and use the pressure of the medium to press the rubber ring on the pipe end to prevent the medium from leaking out. The pressure of the medium acts on the inner cavity of the clamp through the rubber ring. Rubber ring sealing mechanism, the structure of the sealing rubber ring is "C" shape, the elasticity of the rubber ring can play a certain sealing effect on the pipeline. When the clamp is installed, the height of the apron is higher than the height of the pipe and the clamp. Due to the limitation of the inner space of the clamp, the apron is further squeezed, and the internal pressure generated spreads over the entire surface of the apron, and the sealing effect is further enhanced. When there is medium in the pipeline, the medium enters the "C"-shaped cavity and reacts on the sealing lip of the rubber ring, which increases the adhesion force between the rubber ring and the pipeline, thereby achieving self-sealing effect. The greater the fluid pressure in the pipeline, the greater the pressure of the rubber ring, and the better the sealing performance.

The difference between the clamp seal and the flange seal is that the flange seal works by the gasket being pressed by the bolt. Because the tightening force of the bolts is difficult to achieve uniform over the entire circumference, the fluid running in the pipeline can easily destroy the existing balance. Especially after increasing the pressure, the problem is more prominent, running, running, dripping and leaking are serious. In the clamp seal, the clamp seals the rubber ring at the interface of the pipe, and is completely pressed on one side. When the pipe is under the pressure of the fluid, the inner surface of the rubber ring will also be stressed, and it will be more tightly attached to the contact surface, resulting in a better sealing effect.

The above-mentioned embodiments are only examples for clear illustration, and are not intended to limit the embodiments. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (5)

1. A clamp-type annular pipe joint flexible pipe connection structure, comprising a clamp (1) and a sealing rubber ring (2), characterized in that: the inner surface of the clamp (1) has a For the positioning grooves (11) near the ends on both sides and a sealing groove (12) in the middle, the clamps (1) are arranged at the junction of the two pipes (4), and the outer circumference of the pipes (4) near the ends is provided with There is a positioning ring (3), the distance between the two positioning grooves (11) on the clamp is not less than twice the distance between the positioning ring (3) on the pipe and the end of the pipe, and the two positioning grooves (11) are used for The positioning ring (3) on the pipe (4) is clamped tightly, and the gap between the two pipes (4) is located in the sealing groove (12); the sealing groove (12) is provided with a sealing rubber ring (2). 2. The flexible pipe connection structure of a clamp-type annular pipe joint according to claim 1, characterized in that: the middle part of the sealing rubber ring (2) is attached to the surface of the sealing groove (12) of the clamp, and both ends are bent Then, it is attached to the surface of the pipe (4), forming a C shape with its middle. 3. The flexible pipe connection structure of a clamp-type annular pipe joint according to claim 1, characterized in that: the width of the positioning groove (11) is greater than the width of the positioning ring (3), and two on the clamp (1) The distance between the positioning groove (11) is slightly greater than twice the distance between the positioning ring (3) on the pipe and the pipe end, there is a gap between the two pipe ends in the clamp (1), and there is also a gap between the clamp and the pipe end , the adjacent two end pipes are allowed to have a rotation angle of 2° to 3°. 4 . The flexible pipe connection structure of a clamp-type annular pipe joint according to claim 1 , wherein the positioning ring ( 3 ) is a steel belt with an annular protrusion attached to the pipe ( 4 ). 5 . 5 . The flexible pipe connection structure of a clamp-type annular pipe joint according to claim 1 , wherein the clamp ( 1 ) is composed of two semi-circular bodies, and the two bodies are fastened by bolts. 6 .

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