CN112460347A

CN112460347A - Single-groove pipeline interface capable of independently testing pressure

Info

Publication number: CN112460347A
Application number: CN202011572370.4A
Authority: CN
Inventors: 程思哲; 程金煦
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-03-09

Abstract

A single-groove pipeline interface capable of independently testing pressure is provided with a groove, a pressure testing hole is formed in the bottom in the middle of the groove, and two rubber rings are arranged on the groove. When the input water pressure of the pressure test hole is increased to a certain value, a water-filled closed ring is formed between the two rubber rings, so that the sealing performance of the sealing rubber ring of the interface and the self-tightening sealing performance of the rubber ring are tested.

Description

Single-groove pipeline interface capable of independently testing pressure

Technical Field

The invention relates to a flexible interface pipe, which is particularly suitable for a pipe for conveying liquid media.

Background

The pipeline conveying is a conveying mode with the highest liquid conveying efficiency, the sealing performance of each interface of the pipeline formed by connecting the steel pipes is improved, and the pipeline conveying is an important link for ensuring the safe reliability of the pipeline operation.

At present, the flexible interface connection adopting rubber ring sealing is the most common mode of pipeline connection, the traditional flexible interface has a single rubber ring and a double rubber ring sealing mode, the difference is that a plug of the single rubber ring is provided with a groove and is provided with a sealing rubber ring, and the sealing performance of the interface connecting the pipe and the pipe is tested by inputting pressure water after the two ends of the pipeline are sealed; the plug of two rubber rings has two recesses, and a rubber ring is respectively installed to every recess, and after pipe and pipe interconnect, the accessible is to establishing the pressure testing hole input pressure water between two recesses, makes the water pressure that is born the experiment by two rubber ring confined intervals come the sealing performance of inspection interface, can carry out independent pressure testing to each connection interface, has overcome the shortcoming that single rubber ring interface tube can not go on through installation and interface seal inspection in step, effectively improves the installation quality of pipeline. However, the use of the double-rubber-ring interface tube requires an additional groove, increases the length of the invalid tube of the tube, and increases the cost of the steel material. Usually, the length of the plug with double rubber rings is increased by more than 60mm compared with the length of the plug with single rubber ring, for example, a steel pipe with the outer diameter of 1220mm, the wall thickness of 12mm and the length of 6m is adopted, when the double rubber ring connector is adopted, the connector is increased by 60mm, 3.57kg of steel is required to be increased per meter of pipe length on average, the material loss for increasing the invalid length of the steel pipe is more than 1%, the steel consumption of the water pipeline in China reaches hundreds of millions of tons every year, and thousands of tons of steel can be saved by reducing 1%. Therefore, the development of a flexible interface tube which can carry out independent pressure test on the interface without increasing the length of a single-groove pipeline interface with too much socket length is a requirement for executing national energy-saving and consumption-reducing policies and effectively improving the quality level of the pipeline.

Disclosure of Invention

The invention aims to provide a single-groove connector tube capable of carrying out independent pressure testing so as to remove the application bottleneck of high material consumption existing in the conventional double-sealing rubber ring connector tube.

The invention relates to a single-groove pipeline interface capable of independently testing pressure, which consists of a rubber ring 1, a rubber ring 2, a pressure testing hole 3, a sealing inner circle 4, a sealing outer circle 5, a bulge 6, an oblique port 7, a limiting ring 8, a groove 9, a port 10, a socket 11 and a socket 12, wherein the rubber rings 1 and 2 are placed on the groove 9 of a plug 11 before installation, the limiting ring 8 is pushed into an outer concave position of the socket from the oblique port 7 of the socket 12 after the socket is mutually inserted, the outer diameter and the inner diameter of the limiting ring 8 are respectively larger than the inner diameter of the narrowest part of the bevel 7 and smaller than the outer diameter of the bulge 6 of the plug, the outer diameters of the bulge 6 and the port 10 of the plug are slightly smaller than the inner diameter of the sealing inner circle 4 of the socket, and the axis deflection swing angle of the interface is limited by the fit clearance between the pressure testing holes and the sealing inner circle of the socket, and the pressure testing holes 3 are arranged at the bottom of the groove 9 between the two rubber rings or on the pipe wall of the sealing inner circle, and the number of the pressure testing holes is one or more than two. By increasing input water pressure to the pressure test hole 3, a water-filled closed cavity is formed between two rubber rings in a sealing cavity formed by the sealing inner circle of the socket and the groove of the socket, and the two rubber rings can bear the water pressure of the test to form a single-groove pipeline connector capable of independently testing the pressure.

Drawings

FIG. 1 is a schematic view of a sealing interface of a sealing rubber ring capable of independent pressure testing

1. A rubber ring; 2. a rubber ring; 3. pressure testing holes; 4. sealing the inner circle; 5. sealing the excircle; 6. a protrusion; 7. a bevel opening; 8. a limiting ring; 9. a groove; 10. a port; 11. a socket; 12. socket

Detailed Description

The rubber ring 1 and the rubber ring 2 are placed in a groove 9 of a plug 11, a socket 11 is inserted into a socket 12, the rubber ring 1 and the rubber ring 2 enter a sealing inner circle 4 of the socket through a bevel 7 of the socket 12 in a compressed mode, a limiting ring 8 is pushed to an outer concave position of the socket from the bevel 7, pressurized water is input through a pressure testing hole 3 after the installation and connection of the interface are completed, the pressure of input water is gradually increased, when the unit pressure of the input water is larger than the unit pressure of mutual pressing of the rubber rings 1 and 2, the mutual binding surfaces of the rubber rings 1 and 2 are separated to form a water-filled closed circular ring, and a sealing performance test and a rubber ring self-tightening sealing performance test are performed on the interface sealed by applying water pressure to the closed circular ring. Along with the increase of input water, when the axial thrust borne by two annular planes between two rubber rings is greater than the axial movement resistance generated by the compression of the rubber rings by the inner sealing circle and the outer sealing circle of the interface, the rubber rings 1 and 2 are respectively displaced towards the two sides of the groove 9 and compress the inner side of the groove to prevent the rubber rings from continuously displacing, along with the increase of input water pressure, the rubber rings increase the radial pressure of the action of the rubber rings on the inner sealing circle and the outer sealing circle under the reaction force of the inner side of the groove 9, the pressure of the action of the rubber rings on the inner sealing circle and the outer sealing circle is increased along with the increase of the water pressure and is always greater than the input water pressure to form self-tight sealing of the rubber rings, when the input water pressure reaches the pressure required by inspection, the interface does not leak, the sealing performance of the interface reaches the standard, and the purpose.

In order to facilitate the applied pressure water to enter between the two sealing rubber rings from the pressure testing hole, a round rod can be screwed in the pressure testing hole when the sealing rubber rings are installed, the round rod is separated at the pressure testing hole between the two sealing rubber rings, when the socket is inserted into the socket, the round rod is taken out, the mutual attaching force generated by the two sealing rubber rings at the position is reduced compared with that at other positions, the applied water in the pressure testing hole firstly enters the position, a water-filled ring is formed between the two sealing rubber rings conveniently, and after the pressure testing hole finishes the pressure testing, the testing hole is screwed and sealed by a screw.

The socket of this patent is because a recess of two rubber rings sharing, and the bell and spigot back of inserting each other, only need increase 12 mm's interface axial displacement volume again, just can make the interface become and both have a certain amount of axial extension and axis deflection pendulum angle volume, but the flexible interface of the mouth that takes off of joint can not appear, it is too long to have removed the mutual insertion volume of two rubber ring interface bell and spigot of tradition, form the too big extravagant phenomenon that leads to the fact the consumptive material to increase of invalid length of steel pipe, make this patent interface when improving the quality of interface, reach energy saving and consumption reduction's effect again.

A single groove pipeline interface capable of independently testing pressure is characterized in that a socket is provided with a groove, two rubber rings are arranged on the groove, the pipe wall of the bottom of the groove between the two rubber rings or the pipe wall of the sealing inner circle of a socket is provided with one or two or more pressure testing holes, the volume of a sealing cavity formed by the sealing inner circle of the socket and the groove of the socket is larger than the total volume of the two rubber rings, when the input water pressure of the pressure testing holes is larger than the pressure of mutual contact between the two rubber rings, a water-filled closed ring is formed between the two rubber rings, and the sealing performance test and the rubber ring self-tightening sealing performance test are carried out on the interface sealed by the rubber rings by applying water pressure to the closed ring; the pressure intensity of the rubber ring to the surface of the sealing inner circle and the surface of the sealing outer circle is larger than the input water pressure, and the interface is sealed; when the thrust of the axial displacement obtained by the rubber ring by the water pressure input from the pressure test hole is larger than the axial friction force generated by the mutual contact of the sealing inner circle and the sealing outer circle with the rubber ring, the rubber ring generates the axial displacement and compresses the inner edge of the groove to form self-tight sealing; the inner circle surface of the cross section of the rubber ring is a flat bottom, and the outer circle surface is a convex arc; when the rubber ring of the interface is sealed automatically, the pressure of the rubber ring on the contact surface is increased along with the increase of the bearing water pressure and is always greater than the applied water pressure, and the medium conveyed by the pipeline is sealed; before the socket is inserted into the socket, a round bar is arranged between the two rubber rings on the pressure testing hole of the groove, and the round bar is taken out after the socket enters the socket, so that the pressure of mutual contact of the two rubber rings at the position is lower than that of other mutual contact parts of the two rubber rings.

Claims

1. The utility model provides a single recess pipeline interface that can independently pressure testing which characterized in that: the socket is provided with a groove, two rubber rings are arranged on the groove, the pipe wall of the bottom of the groove between the two rubber rings or the pipe wall of the inner sealing circle of the socket is provided with one or two or more pressure test holes, the volume of a sealing cavity formed by the inner sealing circle of the socket and the groove of the socket is larger than the total volume of the two rubber rings, when the input water pressure of the pressure test holes is larger than the pressure intensity of mutual contact between the two rubber rings, a water-filled closed circular ring is formed between the two rubber rings, and the sealing performance test and the rubber ring self-tightening sealing performance test are carried out on the sealed interface of the rubber rings by applying the water pressure to the closed circular ring.

2. The single-groove pipeline interface capable of independent pressure test according to claim 1, characterized in that: the rubber ring seals the interface when the pressure on the surface of the sealing inner circle and the surface of the sealing outer circle is larger than the input water pressure.

3. The single-groove pipeline interface capable of independent pressure test according to claim 1, characterized in that: when the thrust of the axial displacement obtained by the rubber ring is greater than the axial friction force generated by the mutual contact of the sealing inner circle and the sealing outer circle with the rubber ring due to the water pressure input from the pressure test hole, the rubber ring generates the axial displacement and compresses the inner edge of the groove to form self-tight sealing.

4. The single-groove pipeline interface capable of independent pressure test according to claim 1, characterized in that: the inner circle surface of the cross section of the rubber ring is a flat bottom, and the outer circle surface of the cross section of the rubber ring is a convex arc.

5. The single-groove pipeline interface capable of independent pressure test according to claim 1, characterized in that: when the rubber ring of the interface is sealed automatically, the pressure of the rubber ring on the contact surface is increased along with the increase of the bearing water pressure and is always greater than the applied water pressure, and the medium conveyed by the pipeline is sealed.

6. The single-groove pipeline interface capable of independent pressure test according to claim 1, characterized in that: before the socket is inserted into the socket, a round bar is arranged between the two rubber rings on the pressure testing hole of the groove, and the round bar is taken out after the socket enters the socket, so that the pressure of mutual contact of the two rubber rings at the position is lower than that of other mutual contact parts of the two rubber rings.