CN220354810U - Expansion plug sealing structure for high-pressure pipeline test - Google Patents
Expansion plug sealing structure for high-pressure pipeline test Download PDFInfo
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- CN220354810U CN220354810U CN202321447367.9U CN202321447367U CN220354810U CN 220354810 U CN220354810 U CN 220354810U CN 202321447367 U CN202321447367 U CN 202321447367U CN 220354810 U CN220354810 U CN 220354810U
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- expansion
- oil cylinder
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- 238000007789 sealing Methods 0.000 title claims abstract description 102
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 47
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000013013 elastic material Substances 0.000 claims abstract description 5
- 210000002310 elbow joint Anatomy 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses an expansion plug sealing structure for testing a high-pressure pipeline, which comprises a cylinder body arranged at one end of the pipeline to be tested, wherein a piston is connected in the cylinder body in a sealing sliding manner, the middle part of the piston is fixedly connected with an oil cylinder rod which is of a hollow structure, one end of the oil cylinder rod extends into the pipeline to be tested, and the inner cavity of the oil cylinder rod is communicated with the inner cavity of the pipeline to be tested; one side of the cylinder body is provided with a hydraulic oil inlet for driving the piston to slide in the cylinder body; the outer edge of the cylinder rod extending out of the cylinder body is in sliding sleeve joint with a sealing plug structure which is made of elastic materials; a limiting table with the outer diameter larger than that of the sealing plug is arranged at the front end part of the oil cylinder rod; the utility model adopts the integrated design of the oil cylinder and the sealing expansion plug, the tested water passes through the oil cylinder rod, and the hydraulic piston rod is pulled by the high pressure of the oil cylinder, so that the sealing plug is pressed and expanded to realize the sealing and pre-tightening of the expansion plug of the pipeline.
Description
Technical Field
The utility model relates to the technical field of sealing structures, in particular to an expansion plug sealing structure for testing a high-pressure pipeline.
Background
With the increasing progress and development of industrial production automation, the popularization of automation has a critical factor for the whole industrial system. In the production process, higher requirements are put on improving efficiency, production quality and safety production. Meanwhile, quality detection in the production process is also more and more prone to various demands such as automation, intelligence, traceability and the like. Therefore, the automatic detection fixture, the detection tool and the like are developed towards modularization, digitalization and automation. The modularized and automatic design fixture provides possibility for realizing automatic detection. The tool clamp is matched with various components such as pneumatic, hydraulic and the like, so that the application scene and the application occasions are wider, such as key processes and working procedures of processing, assembling, welding, sheet metal, coating, heat treatment, sealing, leakage detection, pressure measurement and the like of parts. Manual frock clamp is in the use, receives artificial operating factor's influence, and frock clamp's tightening torque uniformity and production efficiency are unstable, unstable factors such as security for production efficiency is lower, stability and security's uncontrollable factor greatly increased, a great deal of drawback such as intensity of labour.
In the sealing test work of the high-pressure tube panel pipeline of the boiler, the end part of the pipeline is manually screwed with the expansion plug to realize sealing and fixing, but the installation of the expansion plug has the problems of low pretightening force consistency, low fixing stability and the like, and has certain safety risk and higher labor intensity, so that a sealing structure needs to be redesigned.
Disclosure of Invention
The utility model aims to provide an expansion plug sealing structure for testing a high-pressure pipeline, so as to solve the problems in the background art.
In order to solve the technical problems, the utility model provides the following technical scheme: the expansion plug sealing structure for testing the high-pressure pipeline comprises a cylinder body arranged at one end of the pipeline to be tested, a piston is connected in the cylinder body in a sealing sliding manner, an oil cylinder rod is fixedly connected to the middle part of the piston, the oil cylinder rod is of a hollow structure, one end of the oil cylinder rod extends into the pipeline to be tested, and the inner cavity of the oil cylinder rod is communicated with the inner cavity of the pipeline to be tested;
one side of the cylinder body is provided with a hydraulic oil inlet for driving the piston to slide in the cylinder body;
the outer edge of the cylinder rod extending out of the cylinder body is in sliding sleeve joint with a sealing plug structure which is made of elastic materials; the front end tip of hydro-cylinder pole is provided with the spacing platform that the external diameter is greater than the sealing plug, and when hydro-cylinder pole was slided towards cylinder body one side, sealing plug structure was extruded between spacing platform and cylinder body, along radial expansion, was laminated with the pipeline inner wall of being surveyed and is realized sealedly.
Preferably, a piston cover is arranged at one end of the cylinder body, which is far away from the hydraulic oil inlet, and a spring is embedded between the piston cover and the piston and is used for resetting the piston.
Preferably, one end of the oil cylinder rod, which is far away from the detected pipeline, is connected with a water inlet joint.
Preferably, a piston supporting ring and a piston sealing ring are arranged on the outer peripheral wall of the piston, and a sealing ring fixing plate is fixedly arranged on the outer side of the piston sealing ring.
Preferably, the shaft check rings are arranged at the connection part of the oil cylinder rod and the piston and the connection part of the oil cylinder rod and the piston cover.
Preferably, the sealing plug structure comprises a sealing sleeve and an expansion sleeve, wherein the sealing sleeve is positioned at the front end of the oil cylinder rod, and the expansion sleeve is positioned at the rear end of the sealing sleeve.
Preferably, the expansion sleeve of the sealing plug structure comprises a taper sleeve and an expansion sleeve which are adjacently connected, when the oil cylinder rod slides, the taper sleeve is stressed first, and the taper sleeve extrudes the expansion sleeve to deform and expand, so that sealing is realized.
Preferably, the taper sleeve and the tensioning sleeve are adjacent through an inclined plane, and the tensioning sleeve body extends radially along the measured pipeline through the inclined plane to form a sealing edge.
Preferably, the tensioning sleeve is of a bilateral symmetry structure, the middle part of the tensioning sleeve is sunken, and a fixing sleeve is fixedly arranged;
inclined planes and extended sealing edges are arranged on two sides of the tensioning sleeve, and taper sleeves are arranged on two sides of the tensioning sleeve;
a plurality of groups of tensioning sleeves and taper sleeves are arranged continuously.
Preferably, the hydraulic oil inlet of the cylinder body is fixedly connected with an elbow joint.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model adopts the integrated design of the oil cylinder and the sealing expansion plug, the tested water passes through the oil cylinder rod, and the hydraulic piston rod is pulled by the high pressure of the oil cylinder, so that the sealing plug is pressed and expanded to realize the sealing and pre-tightening of the expansion plug of the pipeline.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
figure 2 is a schematic view of the structure of the sealing plug of the utility model;
fig. 3 is a schematic view of the present utility model in use installation.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the device comprises a cylinder body 1 installed at one end of a measured pipeline 25, a piston 3 is connected in the cylinder body 1 in a sealing sliding manner, an oil cylinder rod 2 is fixedly connected to the middle part of the piston 3, the oil cylinder rod 2 is of a hollow structure, one end of the oil cylinder rod 2 extends into the measured pipeline 25, the inner cavity of the oil cylinder rod 2 is communicated with the inner cavity of the measured pipeline 25, and in addition, one end of the oil cylinder rod 2 far away from the measured pipeline 25 is connected with a water inlet joint 15;
one side of the cylinder body 1 is provided with a hydraulic oil inlet, and an elbow joint 21 is fixedly connected to the hydraulic oil inlet of the cylinder body 1 and used for driving the piston 3 to slide in the cylinder body 1; a piston cover 4 is arranged at one end of the cylinder body 1 far away from the hydraulic oil inlet, a spring 20 is embedded between the piston cover 4 and the piston 3, and the spring 20 is used for resetting the piston 3. The piston cover 4 is provided with a sealing gasket 14 at the joint with the cylinder body, and the fixed connection is completed by adopting an adapting structure such as a nut 11.
The outer edge of the part of the cylinder rod 2 extending out of the cylinder body 1 is in sliding sleeve joint with a sealing plug structure which is made of elastic materials; the front end of the oil cylinder rod 2 is provided with a limiting table with the outer diameter larger than that of the sealing plug, and when the oil cylinder rod 2 slides towards one side of the cylinder body 1, the sealing plug structure is extruded between the limiting table and the cylinder body and expands radially to be attached to the inner wall of a detected pipeline to realize sealing.
Referring to fig. 1 and 2, the sealing plug structure includes a sealing sleeve 5 and an expansion sleeve, the sealing sleeve is located at the front end of the cylinder rod 2, and the expansion sleeve is located at the rear end of the sealing sleeve.
The expansion sleeve of the sealing plug structure comprises a taper sleeve 10 and an expansion sleeve 9 which are adjacently connected, when the oil cylinder rod slides, the taper sleeve 10 is stressed first, and the taper sleeve 10 extrudes the expansion sleeve 9 to deform and expand, so that sealing is realized.
With continued reference to fig. 1 and 2, the tension sleeve 9 and the cone sleeve 10 are both of a toothed structure. The tensioning sleeve 9 and the taper sleeve are arranged at intervals, the taper sleeve 10 is adjacent to the tensioning sleeve 9 through an inclined plane, and the body of the tensioning sleeve 9 radially extends along the measured pipeline 25 through the inclined plane to form a sealing edge. The tensioning sleeve 9 is of a bilateral symmetry structure, the middle part of the tensioning sleeve 9 is sunken, and the fixing sleeve 8 is fixedly arranged; the fixing sleeve 8 is used for limiting and expanding guide.
Inclined planes and extended sealing edges are arranged on two sides of the tensioning sleeve 9, and taper sleeves are arranged on two sides of the tensioning sleeve 9;
the tension sleeve 9 and the taper sleeve 10 are continuously provided with a plurality of groups.
Referring to fig. 2, the two sides of the tension sleeve 9 opposite to the fixed sleeve 8 are also in inclined structures, the fixed sleeve 8 is fastened in the middle by extrusion of the taper sleeve 10, and the sealing edges at the two sides of the tension sleeve 9 deform towards the middle and expand along the inclined surfaces in the middle, so that the sealing of the tested pipeline 25 is realized. And a plurality of continuous groups are arranged, so that a multiple sealing structure is realized.
Under the sealing state: the piston 3 is driven by hydraulic oil to slide to one side, so that the sealing sleeve 5, the taper sleeve 10 and the tensioning sleeve 9 are mutually extruded to realize sealing;
in addition, the two are separated from each other under the action of the reverse force, and the original state is kept, so that the sealing state is released, and the cylinder body 1 and the oil cylinder rod 2 are conveniently taken down.
With continued reference to fig. 1, the sealing structure for the piston 3 and the cylinder rod 2 during installation comprises a piston support ring 23 and a piston sealing ring 17 installed on the outer peripheral wall of the piston 3, and a sealing ring fixing plate 16 fixedly installed on the outer side of the piston sealing ring 17 for fixing installation. The connection part of the oil cylinder rod 2 and the piston 3 and the connection part of the oil cylinder rod 2 and the piston cover 4 are provided with shaft check rings, wherein the shaft check rings at the connection part of the oil cylinder rod 2 and the piston 3 are fixed through a piston 3 fixing sleeve. In addition, an oil cylinder rod sealing ring 18 is installed at the joint of the oil cylinder rod 2 and the cylinder body 1.
When in use, hydraulic oil is pumped in from the elbow joint 21 by the hydraulic pump, so that the piston 3 moves leftwards and drives the oil cylinder rod 2 at the same time; under the action of oil pressure, the expansion sleeve and the sealing sleeve 5 slide to one side of the cylinder body 1, but the limit table expansion sleeve at the end part of the oil cylinder rod 2 and the sealing sleeve generate axial pressure due to the blocking of the cylinder body 1, and the expansion sleeve and the sealing sleeve are expanded by adopting elastic materials to realize sealing; water enters the tested pipeline 25 from the water inlet joint 15 to perform pressure measurement and side leakage; after the leakage and pressure measurement are completed, the hydraulic pressure is released, and the piston 3 is reset along with the acting force of the reset spring. The expansion sleeve and the sealing sleeve 5 are restored to be normal and separated from the inner wall of the measured pipeline 25, so that a user can conveniently withdraw the oil cylinder rod 2 from the pipeline.
The sealing structure is divided into two parts, the sealing force of the sealing sleeve 5 and the combined pretightening force of the taper sleeve 10 and the tensioning sleeve 9 are integrated, the pretightening force of the taper sleeve structure is the pretightening force of the sleeve with taper (the tensioning ring 9) on the pipe wall, the axial force is converted under the hydraulic extrusion, the sealing force of the sealing sleeve 5 is also from the hydraulic pressure, and the sealing sleeve 5 is compressed and deformed (the friction force of the sealing sleeve 5 and the pipe wall and the resistance between the pushing force of the piston 3 deform the sealing sleeve 5) so as to be converted into the sealing force on the pipe wall. The automatic sealing device has the advantages of controllable sealing force and pretightening force, easiness in realizing automatic operation, high consistency of operation force, low labor intensity, high efficiency and the like.
Further, as shown in fig. 1 and 3, a handle 22 and a proximity switch 19 are mounted on the cylinder 1, wherein the handle 22 is mounted back to the pipe to be measured, and the proximity switch 19 is mounted on the side of the cylinder facing the pipe to be measured 25; on this side of the cylinder 1, a mounting plate 7 can be fixed as shown in the figures; during installation, the oil cylinder rod 2 is plugged into the detected pipeline 25 through the operation of the handle 22, and the proximity switch 19 can be used for detecting whether the oil cylinder rod is installed in place.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A expand plug seal structure for high pressure pipeline test, its characterized in that: the device comprises a cylinder body arranged at one end of a detected pipeline, a piston is connected in the cylinder body in a sealing and sliding manner, an oil cylinder rod is fixedly connected to the middle part of the piston, the oil cylinder rod is of a hollow structure, one end of the oil cylinder rod extends into the detected pipeline, and the inner cavity of the oil cylinder rod is communicated with the inner cavity of the detected pipeline;
one side of the cylinder body is provided with a hydraulic oil inlet for driving the piston to slide in the cylinder body;
the outer edge of the cylinder rod extending out of the cylinder body is in sliding sleeve joint with a sealing plug structure which is made of elastic materials; the front end tip of hydro-cylinder pole is provided with the spacing platform that the external diameter is greater than the sealing plug, and when hydro-cylinder pole was slided towards cylinder body one side, sealing plug structure was extruded between spacing platform and cylinder body, along radial expansion, was laminated with the pipeline inner wall of being surveyed and is realized sealedly.
2. The expansion plug sealing structure for high-pressure pipeline testing according to claim 1, wherein: a piston cover is arranged at one end of the cylinder body, which is far away from the hydraulic oil inlet, and a spring is embedded between the piston cover and the piston and is used for resetting the piston.
3. The expansion plug sealing structure for high-pressure pipeline testing according to claim 1, wherein: one end of the oil cylinder rod, which is far away from the measured pipeline, is connected with a water inlet joint.
4. The expansion plug sealing structure for high-pressure pipeline testing according to claim 1, wherein: the outer peripheral wall of the piston is provided with a piston supporting ring and a piston sealing ring, and the outer side of the piston sealing ring is fixedly provided with a sealing ring fixing plate.
5. The expansion plug sealing structure for high-pressure pipeline testing according to claim 2, wherein: the connection part of the oil cylinder rod and the piston is provided with a shaft check ring.
6. The expansion plug sealing structure for high-pressure pipeline testing according to claim 1, wherein: the sealing plug structure comprises a sealing sleeve and an expansion sleeve, wherein the sealing sleeve is positioned at the front end of the oil cylinder rod, and the expansion sleeve is positioned at the rear end of the sealing sleeve.
7. An expansion plug sealing structure for high pressure pipeline testing according to claim 1 or 6, characterized in that: the expansion sleeve of the sealing plug structure comprises a taper sleeve and an expansion sleeve which are adjacently connected, when the oil cylinder rod slides, the taper sleeve is stressed first, and the taper sleeve extrudes the expansion sleeve to deform and expand, so that sealing is realized.
8. The expansion plug sealing structure for high-pressure pipeline testing according to claim 7, wherein: the taper sleeve is adjacent to the tensioning sleeve through an inclined plane, and the tensioning sleeve body extends radially along the measured pipeline through the inclined plane to form a sealing edge.
9. The expansion plug sealing structure for high-pressure pipeline testing according to claim 8, wherein: the tensioning sleeve is of a bilateral symmetry structure, the middle part of the tensioning sleeve is sunken, and a fixing sleeve is fixedly arranged;
inclined planes and extended sealing edges are arranged on two sides of the tensioning sleeve, and taper sleeves are arranged on two sides of the tensioning sleeve;
a plurality of groups of tensioning sleeves and taper sleeves are arranged continuously.
10. The expansion plug sealing structure for high-pressure pipeline testing according to claim 1, wherein: the hydraulic oil inlet of the cylinder body is fixedly connected with an elbow joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321447367.9U CN220354810U (en) | 2023-06-08 | 2023-06-08 | Expansion plug sealing structure for high-pressure pipeline test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321447367.9U CN220354810U (en) | 2023-06-08 | 2023-06-08 | Expansion plug sealing structure for high-pressure pipeline test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220354810U true CN220354810U (en) | 2024-01-16 |
Family
ID=89506403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321447367.9U Active CN220354810U (en) | 2023-06-08 | 2023-06-08 | Expansion plug sealing structure for high-pressure pipeline test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220354810U (en) |
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2023
- 2023-06-08 CN CN202321447367.9U patent/CN220354810U/en active Active
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