CN106949324B

CN106949324B - Hydraulic test method for socket type pipeline

Info

Publication number: CN106949324B
Application number: CN201710172749.8A
Authority: CN
Inventors: 王从水
Original assignee: Tianjin Jiusheng Tongda Technology Co ltd
Current assignee: Tianjin Jiusheng Tongda Technology Co ltd
Priority date: 2017-03-22
Filing date: 2017-03-22
Publication date: 2020-06-30
Anticipated expiration: 2037-03-22
Also published as: CN106949324A

Abstract

The invention belongs to the technical field of pipeline sealing, and particularly provides a socket type pipeline hydraulic test method. The invention aims to solve the problems that in the prior art, a test sealing ring cannot be recycled, does not have the rotation characteristic of a flexible interface and wastes resources. For the purpose, the invention provides a socket type pipeline hydraulic test method, which comprises the following steps: providing a socket pipe and a spigot pipe, the socket pipe comprising a first section and a second section; then pushing the end of the spigot conduit into the confines of the first section; then installing a test sealing part at the end part of the socket pipeline; thereby engaging the socket tube and the second section with each other and forming an annular cavity between the socket tube and the first section; and finally, injecting liquid into the annular cavity and detecting the sealing effect of the socket type pipeline. The method can realize the recycling of the sealing ring for the test, the flexible rotation of the interface and the resource saving.

Description

Hydraulic test method for socket type pipeline

Technical Field

The invention belongs to the technical field of pipeline sealing, and particularly provides a socket type pipeline hydraulic test method.

Background

The use of pipelines is very widespread, mainly in water supply, drainage, heating, gas supply, long-distance oil and gas delivery, agricultural irrigation, hydraulic engineering and various industrial installations. In order to ensure the safe operation of the pipeline, the pipeline is tried to be pressed into a link which is not neglected in pipeline engineering, and the method is an effective method for checking whether the manufacturing and installation quality of the pipeline is qualified or not. In addition to pressure testing the pipe body, the tightness of the pipe joint is also tested.

Socket joints are a common connection between pipes. At present, a double-sealing single-port hydrostatic test method is provided, in which a socket pipeline and a socket pipeline are provided, wherein the socket pipeline is provided with two grooves; mounting a main sealing ring and a sealing ring for testing on the groove; pushing the socket pipeline into the socket pipeline to enable the socket pipeline to be tightly attached to the socket pipeline; and injecting liquid between the main sealing ring and the test sealing ring and checking the sealing effect of the socket type pipeline. Double-seal single mouthful hydraulic system after experimental completion, experimental sealing washer can not recycle, simultaneously, the socket pipeline with the bellmouth pipeline passes through main sealing washer and experimental with fixed of sealing washer, the two can not rotate relatively, has lost the characteristic that flexible interface can rotate. In addition, there is a single-seal hydrostatic test method, which requires a large amount of water or other substances to detect the airtightness of the seal ring, thus causing a problem of resource waste.

Accordingly, there is a need in the art for a new socket pipe hydraulic test method that solves the above problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely to solve the problems that a sealing ring for testing in the prior art cannot be recycled, does not have the rotating characteristic of a flexible interface and wastes resources, the invention provides a socket type pipeline hydraulic test method, which comprises the following steps: providing a socket pipe and a spigot pipe, wherein the socket pipe comprises a first section and a second section, the first section having a diameter greater than the second section; an upper main sealing ring is arranged on the socket interface part; inserting the spigot conduit into the socket conduit until an end of the spigot conduit is within the confines of the first segment; installing a test sealing part at the end part of the socket pipeline; pushing the spigot tube further into the socket tube such that the spigot tube and the second section engage one another and an annular cavity is formed between the spigot tube and the first section; and injecting liquid into the annular cavity and detecting the sealing effect between the socket pipeline and the socket pipeline.

In a preferred embodiment of the above socket pipe hydraulic test method, the socket pipe includes a joint portion, and the method further includes: before the socket pipe is inserted into the socket pipe, a primary seal member is previously attached to the mouthpiece.

In a preferred embodiment of the above socket pipe hydraulic pressure test method, an end of the socket pipe is provided with an inclined portion, and the step of "mounting a test seal member at the end of the socket pipe" further includes mounting the test seal member at the inclined portion.

In a preferred embodiment of the above socket pipe hydraulic test method, the socket pipe further includes a first transition section, a second transition section, and a third section, the first section is connected to the second section through the first transition section, the second section is connected to the third section through the second transition section, the second section has a diameter larger than that of the third section, and in an assembled test state, the inclined portion of the socket pipe and the test seal member provided thereon are in tight abutment with the second transition section.

In the preferable technical scheme of the socket type pipeline hydraulic test method, the socket pipeline is provided with a liquid injection port and an exhaust hole, and the step of injecting liquid into the annular cavity specifically comprises the following steps: and injecting test liquid into the annular cavity through the liquid injection port, and simultaneously discharging gas in the annular cavity through the exhaust hole.

In a preferred embodiment of the above socket pipe hydraulic test method, the method further includes: after the end of the test, the socket pipe is withdrawn from the socket pipe until the end of the socket pipe is again within the confines of the first section; removing the test seal component from the end of the spigot conduit.

In a preferred embodiment of the above socket pipe hydraulic test method, the method further includes: an anti-axial force positioning mechanism is installed at the exhaust hole to prevent the socket pipe and the socket pipe from being disconnected from each other.

In the preferable technical scheme of the socket type pipeline hydraulic test method, the axial force resisting positioning mechanism is a positioning pin.

In the preferable technical scheme of the socket type pipeline hydraulic test method, the axial force resisting positioning mechanism is a positioning ring.

As will be appreciated by those skilled in the art, in a preferred embodiment of the present invention, a socket pipe and a spigot pipe are provided, the socket pipe including a first section and a second section, the first section having a diameter greater than the second section; then inserting the spigot conduit into the socket conduit until the end of the spigot conduit is within the confines of the first segment; then installing a test sealing part at the end part of the socket pipeline; thereby further advancing the spigot tube into the socket tube such that the spigot tube and the second section engage one another and form an annular cavity between the spigot tube and the first section; and finally, injecting liquid into the annular cavity and detecting the sealing effect between the socket pipeline and the socket pipeline. By adopting the steps, the method can realize the characteristics of recycling of the sealing ring for the test, flexible rotation of the pipe joint and resource saving.

Drawings

FIG. 1 is a flow chart of the main steps of the hydraulic test method of the socket type pipeline of the invention;

FIG. 2 is a cross-sectional view of the spigot and socket pipe hydraulic test system of the invention prior to testing;

FIG. 3 is a cross-sectional view of the spigot and socket pipe hydraulic test system of the invention during testing;

FIG. 4 is a cross-sectional view of the female pipeline hydraulic test system of the present invention after testing.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the test liquid is described in the specification in connection with water, it will be appreciated that other forms of test liquid may be used, provided that the liquid itself does not corrode the pipes and seals.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the implementation steps of the socket type hydraulic pipeline test method of the invention include: step S1, providing a socket pipe and a spigot pipe, wherein the socket pipe comprises a first section and a second section, the diameter of the first section is larger than that of the second section, and a main sealing ring is arranged on the socket interface part; step S2, inserting the spigot pipe into the socket pipe until the end of the spigot pipe is within the confines of the first section; step S3, mounting a test sealing component on the end part of the socket pipe; step S4, pushing the socket tube further into the socket tube so that the socket tube and the second section engage each other and form an annular cavity between the socket tube and the first section; and step S5, injecting liquid into the annular cavity and detecting the sealing effect between the socket pipe and the socket pipe.

Referring to fig. 2, fig. 2 is a cross-sectional view of the socket pipe hydraulic test system of the present invention before testing. Specifically, the hydraulic test system comprises a socket pipe 1 and a socket pipe 2, wherein the socket pipe 2 comprises a first section 21 and a second section 22, and the diameter of the first section 21 is larger than that of the second section 22.

With continued reference to fig. 2, in particular, the socket pipe 2 includes a joint 26, the joint 26 is connected to the first segment 21, and the method step S2 further includes: before the socket pipe 1 is inserted into the socket pipe 2, a primary seal member 4 is previously attached to the mouthpiece.

With continued reference to fig. 2, in particular, the end of the socket pipe 1 is provided with an inclined portion 11, and the step S3 further includes installing the test seal member 12 on the inclined portion 11 after the socket pipe 1 is inserted into the first section 21.

Referring next to fig. 3, fig. 3 is a cross-sectional view of the female pipe hydraulic test system of the present invention during an experiment. In particular, the socket pipe 2 further comprises a first transition section 23, a second transition section 24 and a third section 25, the first section 21 is connected with the second section 22 through the first transition section 23, the second section 22 is connected with the third section 25 through the second transition section 24, the diameter of the second section 22 is larger than that of the third section 25, and in an assembled test state, the inclined portion 11 of the socket pipe 1 and the test seal member 12 arranged thereon are tightly abutted against the second transition section 24. Thereby, the socket pipe 1 engages with the second section 22 and forms an annular cavity 3 with the first section 21.

Referring to fig. 3, specifically, the insertion tube 1 is provided with a liquid injection port 27 and an air vent 28, and the step S5 specifically includes: test water is injected into the annular cavity 3 through the injection port 27, while the gas in the annular cavity 3 is discharged through the gas discharge hole 28. Further, a vent valve (not shown) may be disposed on the vent hole 28, and the vent valve is screwed to the vent hole 28, so as to be easily disassembled. When water injection is started, the water feeding pipeline is connected with the water injection port 27, the exhaust valve is opened to exhaust gas in the annular cavity 3, the exhaust valve is closed after the gas is exhausted, water injection and pressurization are continued, and the exhaust valve can be detached after a test is completed. Of course, the exhaust valve can be omitted, and the exhaust hole can be blocked after water is filled for a period of time, so that the aim of exhausting can be achieved.

Referring finally to fig. 4, fig. 4 is a cross-sectional view of the socket pipe hydraulic test system of the present invention after testing. Specifically, the method of the present invention may further include: after the end of the test, the socket pipe 1 is pulled out of the socket pipe 2 until the end of the socket pipe 1 is again within the range of the first section 21, the test seal part 12 is detached from the end of the socket pipe 1 and can be recycled. Because the main seal ring 4 only has a fulcrum at this moment, the socket pipeline 1 can flexibly rotate relative to the socket pipeline 2 on the premise of ensuring the sealing property, and the posture of the maximum rotation angle can be set, so that the socket pipeline is suitable for various test installation scenes. In addition, an axial force resisting dowel 5 is installed at the exhaust hole 28 so as to prevent the socket pipe 1 and the socket pipe 2 from being detached from each other. Although the figures have been described with an anti-axial force locating pin 5 as the preferred embodiment, it will be apparent that other means, such as a locating ring, may be substituted.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims

1. A hydraulic test method for a socket type pipeline is characterized by comprising the following steps:

providing a socket pipe and a spigot pipe, wherein the socket pipe comprises a first section and a second section, the first section having a diameter greater than the second section;

an upper main sealing ring is arranged on the socket interface part;

inserting the spigot conduit into the socket conduit until an end of the spigot conduit is within the confines of the first segment;

installing a test sealing part at the end part of the socket pipeline;

pushing the spigot tube further into the socket tube such that the spigot tube and the second section engage one another and an annular cavity is formed between the spigot tube and the first section;

injecting liquid into the annular cavity and detecting the sealing effect between the socket pipeline and the socket pipeline;

wherein the bell pipe further comprises a first transition section, a second transition section and a third section, the first section being connected to the second section by the first transition section, the second section being connected to the third section by the second transition section, the second section having a diameter greater than the third section, the beveled portion of the spigot pipe and the test seal member disposed thereon abutting closely against the second transition section in the assembled test state;

be provided with on the socket pipeline and annotate liquid mouth and exhaust hole, "to inject into liquid in the toroidal cavity" the step specifically includes: injecting test liquid into the annular cavity through the liquid injection port, and simultaneously discharging gas in the annular cavity through the exhaust hole;

after the end of the test, the socket pipe is withdrawn from the socket pipe until the end of the socket pipe is again within the confines of the first section;

detaching the test seal component from the end of the spigot conduit;

the socket pipe includes a joint, the method further comprising: prior to inserting the spigot conduit into the socket conduit, mounting a primary seal member to the interface portion;

the end of the socket pipe is provided with an inclined part, and the step of mounting the test sealing part at the end of the socket pipe further comprises mounting the test sealing part at the inclined part;

installing an anti-axial force positioning mechanism at the exhaust hole so as to prevent the socket pipe and the socket pipe from being disconnected from each other;

the anti-axial force positioning mechanism is a positioning pin or a positioning ring.