CN112557188A - Flexible self-locking socket pipe joint and pipe joint tensile test method - Google Patents
Flexible self-locking socket pipe joint and pipe joint tensile test method Download PDFInfo
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- CN112557188A CN112557188A CN202011324157.1A CN202011324157A CN112557188A CN 112557188 A CN112557188 A CN 112557188A CN 202011324157 A CN202011324157 A CN 202011324157A CN 112557188 A CN112557188 A CN 112557188A
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- 238000009864 tensile test Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 description 2
- 238000005464 sample preparation method Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a flexible self-locking socket pipe connector which comprises a pipe body, an inserting port axially extending from one end of the pipe body and a receiving port axially extending from the other end of the pipe body, wherein a plurality of first annular bulges axially arranged at intervals are formed on the outer wall of the inserting port, an annular sealing groove is formed between every two adjacent first annular bulges, an included angle alpha formed by the radial outer side wall and the radial inner side wall of the annular sealing groove is 35 degrees, a plurality of second annular bulges with the shapes complementary to the shapes of the first annular bulges are formed on the inner wall of the receiving port, and the tensile test method of the flexible self-locking socket pipe connector provided by the invention is matched with the sizes of an upper clamping arm and a lower clamping arm of a tensile machine by utilizing the mode that the second annular bulges are meshed and connected with the first annular bulges, so that the conditions of test detection equipment are met, the test result and the requirement can be met, and the tensile test difficulty of a large pipe connector is, the cost of the tensile test of the pipe joint is saved.
Description
Technical Field
The invention relates to the technical field of tensile tests, in particular to a flexible self-locking socket pipe joint and a tensile test method of the pipe joint.
Background
The existing large-scale polyethylene winding solid-wall pipe is connected with a tensile test through butting sockets of two pipe test pieces, and then one end of the two pipes is simultaneously stretched to enable the test piece to break, so that the tensile test is not enough: due to the limitation of the volume design of test detection equipment, the large-scale pipe is too large in size, so that the tensile test of the large-scale pipe has the defect that the tensile test cannot meet the test conditions, and the tensile test of the large-scale pipe joint is difficult to increase.
Therefore, it is necessary to provide a flexible self-locking socket pipe joint and a pipe joint tensile test method to solve the above technical problems.
Disclosure of Invention
In order to solve the technical problem, the invention provides a flexible self-locking socket pipe joint.
The invention provides a flexible self-locking socket pipe joint which comprises a pipe body, a socket axially extending from one end of the pipe body and a socket axially extending from the other end of the pipe body, wherein a plurality of first annular bulges axially arranged at intervals are formed on the outer wall of the socket, and the flexible self-locking socket pipe joint comprises a pipe body, a socket axially extending from one end of the pipe body and a socket axially extending from the other end of the pipe body, wherein:
an annular sealing groove is formed between every two adjacent first annular bulges, the radial outer side wall of each annular sealing groove is formed by connecting the upper surface of the inlet of the annular sealing groove to an inflection point, the radial inner side wall of each annular sealing groove is formed by connecting the lower surface of the inlet of the annular sealing groove to the inflection point, an included angle alpha is formed between the radial outer side wall and the radial inner side wall, and the included angle alpha is 35 degrees; and a plurality of second annular bulges with complementary shapes with the first annular bulges are formed on the inner wall of the bearing opening, and when the bearing opening is assembled, the second annular bulges extend into the annular sealing groove and are engaged and connected with the first annular bulges.
The invention also provides a tensile test method of the pipe joint, which depends on the pipe joint and comprises the following steps:
s001: intercepting a sample, namely axially intercepting a pipe body from a socket of the pipe body to serve as a first tensile test piece, and axially intercepting a pipe body from a socket of the pipe body to serve as a second tensile test piece;
s002: fixing a sample, namely fixedly connecting one end of a first tensile test piece, which is far away from the first annular bulge, to an upper clamping arm of a tensile machine; fixedly connecting one end, far away from the second annular convex part, of the second tensile test piece to a lower clamping arm of a tensile machine, and finally meshing and connecting the first annular convex part on the first tensile test piece with the second annular convex part on the second tensile test piece;
s003: the method comprises the following steps of (1) stretching a sample, starting a tensile machine, slowly and uniformly loading, and carrying out tensile loading on a first tensile test piece and a second tensile test piece through the tensile machine;
s004: recording data, recording the loading force of the tensile testing machine on the first tensile test piece and the second tensile test piece, measuring the loading deformation L of the first tensile test piece and the second tensile test piece through large deformation extension, stopping immediately after the first tensile test piece and the second tensile test piece are broken, and recording the maximum load value F.
Preferably, the first tensile test piece and the second tensile test piece are both sheet-like structures with the length of 160 +/-0.2 mm and the width of 50 +/-0.2 mm.
Compared with the prior art, the self-locking socket pipe joint provided by the invention has the following beneficial effects:
for the tensile test aiming at large pipes, the original two whole pipe sample bellmouths are butted, and the axial sampling of the end parts of the two external threads and the internal threads of the self-locking tooth joint is changed. Cutting a sheet-shaped pipe sample with the length of 160 +/-0.2 mm and the width of 50 +/-0.2 mm, and mounting the two pipe samples on the upper part and the lower part of a U-shaped arm piece of a tensile machine to perform a tensile test according to requirements.
The sample preparation method is adaptive to the sizes of the upper clamping arm and the lower clamping arm of the tensile machine, meets the conditions of test detection equipment, can meet the sample result and requirements, reduces the difficulty of the tensile test of a large pipe joint, and saves the tensile test cost of the pipe joint.
Drawings
FIG. 1 is a schematic cross section of a flexible self-locking socket pipe joint provided by the invention after the socket and the socket are connected;
FIG. 2 is an enlarged schematic view of A in FIG. 1;
fig. 3 is a schematic diagram of a first tensile test piece and a second tensile test piece mounted on a tensile machine in the pipe joint tensile test method provided by the invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1 in combination with fig. 2 and 3, in a specific implementation process, a flexible self-locking socket pipe fitting includes a pipe body, a spigot 1 axially extending from one end of the pipe body, and a socket 2 axially extending from the other end of the pipe body, wherein a plurality of first annular protrusions 21 axially spaced apart are formed on an inner wall of the spigot 1, and wherein:
an annular sealing groove is formed between every two adjacent first-class annular bulges 21, the radial outer side wall 211 of each annular sealing groove is formed by connecting the upper surface 112 of the inlet of each annular sealing groove to an inflection point 111, the radial inner side wall 212 of each annular sealing groove is formed by connecting the lower surface 113 of the inlet of each annular sealing groove to the inflection point 111, an included angle alpha is formed between the radial outer side wall 211 and the radial inner side wall 212, a plurality of second-class annular bulges 11 with the shape complementary to that of the first-class annular bulges 21 are formed on the inner wall of the socket 2, and when the socket is assembled, the second-class annular bulges extend into the annular sealing grooves and are meshed with the first-class annular bulges 21;
the allowable range of the included angle alpha is selected to be 0 degrees < alpha < 90 degrees, generally, in the range, when the angle alpha is greater than 0 degrees < alpha < 25 degrees, the second annular bulge 11 on the inner wall of the socket 2 needs excessive deformation to be clamped into the annular sealing groove when the first annular bulge 21 is meshed with the second annular bulge 11, and when the angle alpha is greater than 25 degrees < alpha < 90 degrees, the second annular bulge 11 on the inner wall of the socket 2 can be rapidly clamped into the annular sealing groove without excessive deformation. However, through a lot of experiments, the inventor finds that when the included angle α is 35 °, the engagement and connection matching effect of the first annular protrusion 21 and the second annular protrusion 11 is rather best, and the matching adaptability and connection strength of the two are enhanced.
The invention also provides a tensile test method of the flexible self-locking socket pipe joint, which depends on the pipe joint and comprises the following steps:
s001: intercepting a sample, namely intercepting a pipe body from the socket 1 of the pipe body in the axial direction to serve as a first tensile test piece 33, and intercepting a pipe body from the socket 2 of the pipe body in the axial direction to serve as a second tensile test piece 34;
s002: fixing a sample, namely firstly fixedly connecting one end of the first tensile test piece 33, which is far away from the part of the first annular bulge 21, to the upper clamping arm 31 of the tensile machine 3; fixedly connecting one end of the second tensile test piece 34, which is far away from the part of the second type annular bulge 11, to the lower clamping arm 32 of the tensile machine 3, and finally, engaging and connecting the part of the first type annular bulge 21 on the first tensile test piece 33 with the part of the second type annular bulge 11 on the second tensile test piece 34;
s003: a tensile sample is pulled, a tensile machine 3 is started to slowly and uniformly load, and the first tensile test piece 33 and the second tensile test piece 34 are subjected to tensile loading through the tensile machine 3;
s004: data are recorded, the loading force of the tensile testing machine on the first tensile test piece 33 and the second tensile test piece 34 is recorded, the loading deformation amount of the first tensile test piece 33 and the second tensile test piece 34 is measured through large deformation extension, the test is stopped immediately after the first tensile test piece 33 and the second tensile test piece 34 are broken, and the maximum load value is recorded.
Preferably, the first tensile test piece 33 and the second tensile test piece 34 are both sheet-like structures with a length of 160 + -0.2 mm and a width of 50 + -0.2 mm.
In the machining process of the self-locking tooth, the machining precision of the self-locking tooth and the control difficulty of the structural quality of the self-locking tooth are high, the yield is not controllable, and therefore the cost of an interface is high, and therefore the tensile strength of the self-locking tooth of the pipe is measured necessarily. This application is to the tensile test to large-scale tubular product, by former two whole pipe sample bellmouths butt joints, changes into two external screw threads and internal thread self-locking tooth joint tip axial samples. Cutting a sheet-shaped pipe sample with the length of 160 +/-0.2 mm and the width of 50 +/-0.2 mm, installing the two pipe samples on the upper part and the lower part of a U-shaped arm piece of the tensile machine 3, and performing a tensile test after the first annular bulge 21 and the second annular bulge 11 are tightly meshed and connected.
As shown in FIG. 3, the sample preparation method is adapted to the sizes of the upper clamping arm 31 and the lower clamping arm 32 of the tensile machine 3, so that the conditions of test detection equipment are met, the test result and the requirements can be met, the tensile test difficulty of a large pipe joint is reduced, and the tensile test cost of the pipe joint is saved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (3)
1. The utility model provides a flexible auto-lock socket pipe material connects, includes the body, certainly body one end axial extension's interface, from body other end axial extension's socket, the outer wall of interface is formed and is had the cyclic annular arch of a kind that a plurality of axial intervals set up, its characterized in that:
an annular sealing groove is formed between every two adjacent first annular bulges, the radial outer side wall of each annular sealing groove is formed by connecting the upper surface of the inlet of the annular sealing groove to an inflection point, the radial inner side wall of each annular sealing groove is formed by connecting the lower surface of the inlet of the annular sealing groove to the inflection point, an included angle alpha is formed between the radial outer side wall and the radial inner side wall, and the included angle alpha is 35 degrees; and a plurality of second annular bulges with complementary shapes with the first annular bulges are formed on the inner wall of the bearing opening, and when the bearing opening is assembled, the second annular bulges extend into the annular sealing groove and are engaged and connected with the first annular bulges.
2. A tensile test method of a flexible self-locking socket pipe joint relies on the pipe joint of claim 1, and is characterized in that: the method comprises the following steps:
s001: intercepting a sample, namely axially intercepting a pipe body from a socket of the pipe body to serve as a first tensile test piece, and axially intercepting a pipe body from a socket of the pipe body to serve as a second tensile test piece;
s002: fixing a sample, namely fixedly connecting one end of a first tensile test piece, which is far away from the first annular bulge, to an upper clamping arm of a tensile machine; fixedly connecting one end, far away from the second annular convex part, of the second tensile test piece to a lower clamping arm of a tensile machine, and finally meshing and connecting the first annular convex part on the first tensile test piece with the second annular convex part on the second tensile test piece;
s003: the method comprises the following steps of (1) stretching a sample, starting a tensile machine, slowly and uniformly loading, and carrying out tensile loading on a first tensile test piece and a second tensile test piece through the tensile machine;
s004: recording data, recording the loading force of the tensile testing machine on the first tensile test piece and the second tensile test piece, measuring the loading deformation L of the first tensile test piece and the second tensile test piece through large deformation extension, stopping immediately after the first tensile test piece and the second tensile test piece are broken, and recording the maximum load value F.
3. The pipe joint tensile test method of claim 2, wherein: the first tensile test piece and the second tensile test piece are both sheet-shaped structures with the length of 160 +/-0.2 mm and the width of 50 +/-0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011324157.1A CN112557188A (en) | 2020-11-23 | 2020-11-23 | Flexible self-locking socket pipe joint and pipe joint tensile test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011324157.1A CN112557188A (en) | 2020-11-23 | 2020-11-23 | Flexible self-locking socket pipe joint and pipe joint tensile test method |
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| Publication Number | Publication Date |
|---|---|
| CN112557188A true CN112557188A (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011324157.1A Pending CN112557188A (en) | 2020-11-23 | 2020-11-23 | Flexible self-locking socket pipe joint and pipe joint tensile test method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965628A (en) * | 2017-12-29 | 2018-04-27 | 广东管博管道技术科技有限公司 | A kind of pipeline self-sealing socket interface |
| CN108331989A (en) * | 2018-03-28 | 2018-07-27 | 广东管博管道技术科技有限公司 | A kind of double containment self-locking bell socket |
| CN108397622A (en) * | 2018-06-01 | 2018-08-14 | 广东管博管道技术科技有限公司 | A kind of bell socket of outer wall belt card slot |
| CN108443627A (en) * | 2018-03-30 | 2018-08-24 | 广东管博管道技术科技有限公司 | A kind of flexible sealing self-locking bell socket |
-
2020
- 2020-11-23 CN CN202011324157.1A patent/CN112557188A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965628A (en) * | 2017-12-29 | 2018-04-27 | 广东管博管道技术科技有限公司 | A kind of pipeline self-sealing socket interface |
| CN108331989A (en) * | 2018-03-28 | 2018-07-27 | 广东管博管道技术科技有限公司 | A kind of double containment self-locking bell socket |
| CN108443627A (en) * | 2018-03-30 | 2018-08-24 | 广东管博管道技术科技有限公司 | A kind of flexible sealing self-locking bell socket |
| CN108397622A (en) * | 2018-06-01 | 2018-08-14 | 广东管博管道技术科技有限公司 | A kind of bell socket of outer wall belt card slot |
Non-Patent Citations (1)
| Title |
|---|
| 代启勇、王志伟、李艳英: "中华人民共和国国家标准GB/T 19810-2005 聚乙烯（PE）管材和管件 热熔对接接头拉伸强度和破坏形式的测定", vol. 2005, 中国标准出版社, pages: 1 - 7 * |
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