CN115790987B - Pressure test plug for open end of conduit - Google Patents
Pressure test plug for open end of conduit Download PDFInfo
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- CN115790987B CN115790987B CN202310086979.8A CN202310086979A CN115790987B CN 115790987 B CN115790987 B CN 115790987B CN 202310086979 A CN202310086979 A CN 202310086979A CN 115790987 B CN115790987 B CN 115790987B
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- air chamber
- pressure head
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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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Abstract
The invention discloses a pressure testing plug for an open end of a conduit, which comprises an air chamber, wherein a spring pressure head is arranged at the port of the air chamber, the spring pressure head protrudes out of the port of the air chamber, a locking nut is sleeved on the protruding part of the spring pressure head and is in threaded fit with the port of the air chamber, a rubber sealing block is arranged in the spring pressure head, a locking through hole is arranged on the rubber sealing block, a first gland and a second gland are respectively arranged at two ends of the rubber sealing block, an annular clamping table is arranged at the port of the outer side of the spring pressure head, and the annular clamping table is abutted against the first gland; the piston is arranged in the air chamber in a sliding manner and comprises a shell, an annular protruding part is arranged on the outer side wall of the shell, a plurality of vent holes are formed in the side wall of the shell, and the outer side end of the shell is abutted against the second gland; this scheme structural design is ingenious, and the pipe dismouting is convenient, is applicable to the sealed fixed of the open end of pipe under different pressure seal tests, and the pressure of test is bigger, just showing the sealed effect to the pipe.
Description
Technical Field
The invention relates to the technical field of pressure testing of a conduit, in particular to a pressure testing plug for an open end of the conduit.
Background
The pipeline part is mainly applied to hydraulic, fuel, lubricating oil, environmental control and other systems of the aircraft, and is a life line of the aircraft; the pressure sealing test of the conduit is an important detection process for detecting the sealing performance of a product in the process of producing and manufacturing the conduit, and is mainly divided into:
air pressure test: checking the sealing performance of the product under the gas condition that the pressure is the working pressure;
withstand voltage test: testing the test piece for its ability to withstand twice the working pressure of the liquid medium;
explosion test: the test piece was checked for burst pressure of the quadruple working pressure liquid medium that it could withstand.
For the conduit with both ends being formed ends, one end of the conduit is connected with external pressure equipment through an adapter in a threaded connection mode, and the other end of the conduit is plugged through a plug in a threaded connection mode; the method aims at the guide pipe with one end being a forming end and the other end being an open end, so as to ensure the manufacturing compliance of the guide pipe; at present, an open end is prolonged (usually 50 mm), a process piece is adopted for forming the prolonged tail end, so that the open end of a conduit is in threaded connection with a plug, the formed end of the conduit is connected with external pressure equipment, and a pressure sealing test is carried out on the conduit (the test mode is the same as that of the conduit with both ends being formed ends); after the pressure sealing test is finished, the extension part of the open end is cut, the cut port needs to be flat, and finally the catheter is measured, so that the manufacturing of the catheter meets the design requirements, and the following defects also exist in the mode:
1. the material loss in the catheter processing and manufacturing process is increased, each open-end catheter needs to be prolonged to the open end for testing, the aviation material cost is high, and the demand of a single catheter is large, so that the mode can cause the loss of a large amount of materials.
2. The catheter needs to lengthen the margin of the open end under the condition of design parameters; then, molding and processing the extended end by adopting a process piece, and testing after processing; then cutting and flattening the extension part after the test is completed; finally, measuring the catheter to ensure that the catheter meets the design requirement; thereby increasing the manufacturing process and the manufacturing cost of the catheter and reducing the production efficiency of the catheter.
Disclosure of Invention
The invention provides a pressure testing plug for an open end of a conduit, which solves the problems of large material loss and complicated manufacturing procedures of the conduit with the open end in the prior art caused by pressure sealing test.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a pipe open end pressure test plug, it includes inside cavity and one end open-ended air chamber, the port department of air chamber is provided with inside cavity and both ends open-ended spring pressure head, spring pressure head protrusion air chamber's port, and the cover is equipped with the lock nut that is used for extruding spring pressure head and makes spring pressure head shrink on spring pressure head's the bulge, lock nut and the port screw thread cooperation of air chamber are provided with the rubber seal piece in the spring pressure head, be provided with the locking through-hole that is used for wearing to establish the pipe open end on the rubber seal piece, the both ends of rubber seal piece are provided with first gland and second gland respectively, spring pressure head's outside port department is provided with annular clamping table, annular clamping table and first gland looks butt; the piston is arranged in the air chamber in a sliding manner, the piston comprises a shell with hollow inside and two open ends, an annular protruding portion which is matched with the inner side wall of the air chamber in a sliding sealing manner is arranged on the outer side wall of the shell, a plurality of vent holes are formed in the side wall of the shell between the annular protruding portion and the bottom of the air chamber, the outer side end of the shell is abutted against the second gland, and the open end of the guide tube penetrates through the first gland, the locking through hole and the second gland and is communicated with the inside of the shell.
The beneficial effects of adopting above-mentioned technical scheme are: according to the scheme, the locking nut is screwed, so that the spring pressure head can be driven to shrink and squeeze the rubber sealing block, the rubber sealing block applies pretightening force to the guide pipe, and the air chamber is sealed while the guide pipe is prevented from loosening; and then the guide pipe is pressurized through external pressure equipment, the medium finally flows into the air chamber through the guide pipe, the shell and the vent hole, the medium with pressure can generate thrust to the annular protruding part, the piston gradually slides towards the opening end of the air chamber and extrudes the second gland and the rubber sealing block, the rubber sealing block axially contracts, and the axially contracted rubber sealing block only radially expands to the rubber sealing block, so that the radial pressure of the rubber sealing block to the guide pipe is increased, the friction force between the rubber sealing block and the guide pipe is increased, and the sealing effect to the guide pipe is improved.
Further, a plurality of strip-shaped openings which are convenient for the shrinkage of the spring pressure head are annularly distributed on the spring pressure head, the outer side wall of the protruding part of the spring pressure head is in a truncated cone shape with the shrinkage of the opening, the lock nut is in a circular ring shape, an annular pressure table is arranged at the outer side port of the lock nut, and the annular pressure table is abutted with the outer side wall of the protruding part of the spring pressure head.
The beneficial effects of adopting above-mentioned technical scheme are: the strip opening provides the buffering space for the shrink of spring pressure head, and at lock nut screw up in-process gradually, annular pressure platform can slide on the lateral wall of spring pressure head, because the radial dimension of annular pressure platform is fixed, leads to annular pressure platform can extrude the lateral wall of spring pressure head to order about spring pressure head to shrink gradually.
Further, an annular sinking table is arranged at the port of the air chamber, and the inner side end of the spring pressure head is clamped on the annular sinking table.
Further, the two ends of the rubber sealing block are provided with the first clamping grooves, and the first pressing cover and the second pressing cover are provided with clamping heads which are clamped with the first clamping grooves, so that the structure among the first pressing cover, the second pressing cover and the rubber sealing block is stable, and radial deflection is not easy to occur; the inner side of the second gland is provided with a second clamping groove, and the opening end of the shell is inserted into the second clamping groove, so that the second gland is not easy to deviate radially in the pressure transmission process, and the second gland is favorable for uniformly and stably transmitting the pressure of the shell to the rubber sealing block.
Further, the inner side end of the shell is abutted against the bottom of the air chamber, so that the piston cannot slide in the air chamber before the pressure sealing test is carried out, and meanwhile, the outer side end of the shell is prevented from being separated from the second gland.
Further, the open end of the guide pipe is in interference fit with the locking through hole, and the guide pipe is penetrated behind the locking through hole by utilizing elasticity of the rubber sealing block, so that the guide pipe has a certain sealing effect on the outer wall of the guide pipe.
Further, a rubber ring for sliding seal is arranged on the contact surface of the annular protruding part and the inner wall of the air chamber.
The beneficial effects of the invention are as follows:
1. according to the scheme, the rubber sealing block is used for extruding and sealing, damage to the guide pipe in the pressure sealing test process is reduced to the greatest extent, the quick sealing of the open end of the guide pipe is realized, the material waste of the guide pipe is reduced, and the production and manufacturing procedures of the guide pipe are simplified.
2. The scheme is suitable for pressure sealing test under different pressure conditions, when the test pressure is larger, the piston pushing stroke is larger, the rubber sealing block is forced to generate larger deformation, larger friction force is formed between the rubber sealing block and the guide pipe, and therefore the sealing effect on the guide pipe is improved, and the reliability of the test is improved.
3. According to the scheme, the locking jacket is screwed, the spring chuck is compressed, and the rubber sealing block is radially extruded, so that the rubber sealing block provides pretightening force for the guide pipe, the open end of the guide pipe is further fixed, and the guide pipe is prevented from being punched and separated in the medium pressurizing process.
Drawings
Fig. 1 is a schematic structural view of a pressure testing plug at the open end of a conduit.
Fig. 2 is a cross-sectional view of a pressure testing plug at the open end of a conduit.
Fig. 3 is a schematic flow diagram of a pressure medium of a pressure test plug at the open end of a conduit.
Fig. 4 is a schematic structural view of the piston.
Fig. 5 is a schematic structural view of a spring ram.
Fig. 6 is a schematic structural view of the lock nut.
Wherein, 1, an air chamber, 2, a spring pressure head, 3, a locking nut, 4, a rubber sealing block, 5, a locking through hole, 6, a first gland, 7, a second gland, 8, an annular clamping table, 9 and a shell, 10, annular protruding parts, 11, ventilation holes, 12, strip-shaped openings, 13, annular pressing tables, 14, annular sinking tables, 15, first clamping grooves, 16, clamping heads, 17, second clamping grooves, 18, rubber rings, 19 and guide pipes.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1
As shown in fig. 1 to 4, the pressure testing plug for the open end of the conduit in the scheme comprises an air chamber 1 with a hollow inside and an open end, a spring pressing head 2 with two open ends is arranged at the port of the air chamber 1, an annular sinking table 14 is arranged at the port of the air chamber 1, the inner side end of the spring pressing head 2 is clamped on the annular sinking table 14, the spring pressing head 2 protrudes out of the port of the air chamber 1, a locking nut 3 for extruding the spring pressing head 2 and shrinking the spring pressing head 2 is sleeved on the protruding part of the spring pressing head 2, and the locking nut 3 is in threaded fit with the port of the air chamber 1.
The spring pressure head 2 is internally provided with a rubber sealing block 4, the rubber sealing block 4 is provided with a locking through hole 5 for penetrating through the open end of the guide pipe 19, the two ends of the rubber sealing block 4 are respectively provided with a first gland 6 and a second gland 7, the outer side port of the spring pressure head 2 is provided with an annular clamping table 8, and the annular clamping table 8 is in butt joint with the first gland 6.
The piston is arranged in the air chamber 1 in a sliding manner, the piston comprises a shell 9 with hollow inside and two open ends, an annular protruding portion 10 which is in sliding sealing fit with the inner side wall of the air chamber 1 is arranged on the outer side wall of the shell 9, a rubber ring 18 used for sliding sealing is arranged on the contact surface between the annular protruding portion 10 and the inner wall of the air chamber 1, a plurality of vent holes 11 are formed in the side wall of the shell 9 between the annular protruding portion 10 and the bottom of the air chamber 1, the outer side end of the shell 9 is abutted against the second gland 7, the open end of the guide pipe 19 penetrates through the first gland 6, the locking through hole 5 and the second gland 7 and is communicated with the inside of the shell 9, the open end of the guide pipe 19 is in interference fit with the locking through hole 5, and the rubber sealing block 4 is used for elasticity, so that the guide pipe 19 is penetrated on the locking through hole 5, and then has a certain sealing effect on the outer wall of the guide pipe 19.
The two ends of the rubber sealing block 4 are provided with the first clamping grooves 15, the first gland 6 and the second gland 7 are provided with the clamping heads 16 which are clamped with the first clamping grooves 15, so that the structure among the first gland 6, the second gland 7 and the rubber sealing block 4 is stable, and radial offset is not easy to occur; the second clamping groove 17 is formed in the inner side of the second gland 7, and the opening end of the shell 9 is inserted into the second clamping groove 17, so that the second gland 7 is not easy to radially deviate in the pressure transmission process, and the second gland 7 is beneficial to uniformly and stably transmitting the pressure of the shell 9 to the rubber sealing block 4.
The inner side end of the housing 9 abuts against the bottom of the air chamber 1, so that the piston does not slide in the air chamber 1 before the pressure sealing test is performed, and at the same time, the outer side end of the housing 9 is prevented from being separated from the second gland 7.
When the pressure sealing test is carried out, the forming end of the conduit 19 is connected with external pressure equipment, the locking nut 3 is screwed down to drive the spring pressure head 2 to shrink, and the shrunk spring pressure head 2 can squeeze the rubber sealing block 4, so that the rubber sealing block 4 applies pretightening force to the conduit 19, the locking through hole 5 is tightly matched with the conduit 19, and the sealing of the air chamber 1 is realized while the loosening of the conduit 19 is avoided; the guide pipe 19 is punched through external pressure equipment, a medium flows into the shell 9 through the guide pipe 19 and flows into the air chamber 1 through the vent holes 11, so that the pressure in the air chamber 1 is gradually increased, the medium with pressure can generate thrust to the annular protruding part 10, the piston gradually slides towards the opening end of the air chamber 1 and presses the second gland 7 and the rubber sealing block 4, the rubber sealing block 4 is axially contracted, and the axially contracted rubber sealing block 4 can only radially expand to the rubber sealing block 4, so that the radial pressure of the rubber sealing block 4 to the guide pipe 19 is increased, the friction force between the rubber sealing block 4 and the guide pipe 19 is increased, and the sealing effect on the guide pipe 19 is improved; the arrangement is such that the greater the pressure tested, the greater the axial compression of the rubber sealing block 4, the greater the radial pressure generated on the conduit 19, the more remarkable the sealing effect, and finally the sealing under different pressure tests on the open end of the conduit 19.
After the pressure sealing test is finished, the pressure in the air chamber 1 is relieved through external pressure equipment, and then the locking nut 3 is screwed out, so that the guide pipe 19 can be pulled out of the locking through hole 5, and the disassembly is convenient.
Example 2
As shown in fig. 5 and 6, the embodiment provides a specific scheme of the spring pressing head 2 on the basis of embodiment 1, a plurality of strip-shaped openings 12 which are convenient for the spring pressing head 2 to shrink are annularly distributed on the spring pressing head 2, the outer side wall of the protruding part of the spring pressing head 2 is in a circular truncated cone shape with the opening shrunk, the locking nut 3 is in a circular ring shape, an annular pressing table 13 is arranged at the outer side port of the locking nut 3, and the annular pressing table 13 is abutted against the outer side wall of the protruding part of the spring pressing head 2.
The strip-shaped opening 12 provides a buffer space for the shrinkage of the spring press head 2, and in the process of gradually tightening the lock nut 3, the annular press table 13 can slide on the outer side wall of the spring press head 2, and the radial dimension of the annular press table 13 is fixed, so that the annular press table 13 can squeeze the outer side wall of the spring press head 2, and the spring press head 2 is driven to gradually shrink.
In summary, the pressure test plug of the open end of the conduit in the scheme has ingenious structural design, and the conduit 19 is convenient to assemble and disassemble, so that the pressure test plug is suitable for sealing and fixing the open end of the conduit 19 under different pressure sealing tests, thereby reducing the material waste of the conduit 19 and simplifying the production and manufacturing procedures of the conduit 19; meanwhile, the greater the pressure of the sealing test, the obvious sealing effect on the guide pipe 19 is achieved, so that the reliability of the pressure sealing test is effectively improved.
Claims (7)
1. The utility model provides a pipe open end pressure test end cap, its characterized in that includes inside cavity and one end open-ended air chamber (1), the port department of air chamber (1) is provided with inside cavity and both ends open-ended spring pressure head (2), spring pressure head (2) protrusion air chamber (1) port, and the cover is equipped with lock nut (3) that are used for extrudeing spring pressure head (2) and make spring pressure head (2) shrink on the bulge of spring pressure head (2), lock nut (3) and the port screw-thread fit of air chamber (1), be provided with rubber sealing block (4) in spring pressure head (2), be provided with on rubber sealing block (4) and be used for wearing to establish pipe (19) open end locking through-hole (5), the both ends of rubber sealing block (4) are provided with first gland (6) and second gland (7) respectively, the outside port department of spring pressure head (2) is provided with annular clamping table (8), annular clamping table (8) and first (6) butt;
the inner sliding type air chamber is characterized in that a piston is arranged in the air chamber (1), the piston comprises a shell (9) with hollow inside and two open ends, an annular protruding portion (10) which is in sliding sealing fit with the inner side wall of the air chamber (1) is arranged on the outer side wall of the shell (9), a plurality of vent holes (11) are formed in the side wall of the shell (9) between the annular protruding portion (10) and the bottom of the air chamber (1), the outer side end of the shell (9) is abutted against the second gland (7), and the open end of the guide tube (19) penetrates through the first gland (6), the locking through hole (5) and the second gland (7) and is communicated with the inside of the shell (9).
2. The pressure test plug for the open end of the conduit according to claim 1, wherein a plurality of strip-shaped openings (12) which are convenient for the shrinkage of the spring pressure head (2) are annularly distributed on the spring pressure head (2), the outer side wall of the protruding part of the spring pressure head (2) is in a truncated cone shape with the shrinkage of the opening, the locking nut (3) is in a circular ring shape, an annular pressing table (13) is arranged at the outer side port of the locking nut (3), and the annular pressing table (13) is abutted against the outer side wall of the protruding part of the spring pressure head (2).
3. The pressure testing plug for the open end of the conduit according to claim 1, wherein an annular sinking table (14) is arranged at the port of the air chamber (1), and the inner end of the spring pressure head (2) is clamped on the annular sinking table (14).
4. The pressure test plug for the open end of the conduit according to claim 1, wherein the two ends of the rubber sealing block (4) are respectively provided with a first clamping groove (15), clamping heads (16) which are clamped with the first clamping grooves (15) are respectively arranged on the first gland (6) and the second gland (7), a second clamping groove (17) is arranged on the inner side of the second gland (7), and the opening end of the shell (9) is inserted into the second clamping groove (17).
5. The conduit open end pressure testing plug according to claim 1, characterized in that the inner end of the housing (9) abuts against the bottom of the air chamber (1).
6. The conduit open end pressure testing plug according to claim 1, wherein the conduit (19) open end is in interference fit with the locking through hole (5).
7. The pressure testing plug of the open end of the conduit according to claim 1, wherein a rubber ring (18) for sliding sealing is arranged on the contact surface of the annular protruding part (10) and the inner wall of the air chamber (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310086979.8A CN115790987B (en) | 2023-02-09 | 2023-02-09 | Pressure test plug for open end of conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310086979.8A CN115790987B (en) | 2023-02-09 | 2023-02-09 | Pressure test plug for open end of conduit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115790987A CN115790987A (en) | 2023-03-14 |
| CN115790987B true CN115790987B (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310086979.8A Active CN115790987B (en) | 2023-02-09 | 2023-02-09 | Pressure test plug for open end of conduit |
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| CN (1) | CN115790987B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211476A (en) * | 2017-06-30 | 2019-01-15 | 东风（十堰）汽车管业有限公司 | A kind of hose pipe end blocks the device of leak test |
| CN109458515A (en) * | 2018-12-07 | 2019-03-12 | 中车西安车辆有限公司 | A kind of airtight plugging device of sampling line and method |
| CN112145859A (en) * | 2020-10-20 | 2020-12-29 | 张家港中集圣达因低温装备有限公司 | Pressure test plug |
| CN213206944U (en) * | 2020-04-01 | 2021-05-14 | 福州振协管道有限公司 | A interior expanding end cap for pipeline leakproofness detects |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB855275A (en) * | 1959-09-07 | 1960-11-30 | Flight Refueling Ltd | Improvements in or relating to plugs or closures |
| JPS62134125A (en) * | 1985-12-02 | 1987-06-17 | アルミニウム カンパニ− オブ アメリカ | Sealing device for hollow-member end section |
| DE19648364A1 (en) * | 1996-11-22 | 1998-05-28 | Georg Maier | Sealing test stopper for monitoring tightness of pipe system carrying medium |
| ITBO20120174A1 (en) * | 2012-03-30 | 2013-10-01 | Helium Technology S R L | CLOSING AND / OR HOLDING DEVICE |
| CN102937506B (en) * | 2012-11-22 | 2014-12-10 | 浙江久立特材科技股份有限公司 | Inlet sealing device for steel pipe airtight tests |
| CN105135146B (en) * | 2015-10-13 | 2017-03-01 | 天津博益气动股份有限公司 | Mouth plugging apparatus |
| CN108444808B (en) * | 2018-02-01 | 2020-07-14 | 浙江中超新材料股份有限公司 | Pipe orifice connecting device for pressure test of automobile radiator |
| CN108827541A (en) * | 2018-03-13 | 2018-11-16 | 中冶南方（武汉）自动化有限公司 | Novel air tight detects seal plug |
| CN112412387B (en) * | 2020-11-23 | 2021-08-06 | 中国矿业大学 | Reusable gas drilling two-plugging one-injection integrated hydraulic packer |
| CN214947320U (en) * | 2021-04-09 | 2021-11-30 | 山西建筑工程集团有限公司 | Plugging device for port for municipal pipeline construction |
| CN114165671B (en) * | 2021-10-18 | 2024-05-03 | 上海贤日测控科技有限公司 | Floating filling sealing mechanism |
| CN217081868U (en) * | 2021-12-31 | 2022-07-29 | 万耐特(珠海珠澳跨境工业区)温控设备有限公司 | Quick-mounting follow-up sealing plug for air tightness test |
-
2023
- 2023-02-09 CN CN202310086979.8A patent/CN115790987B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211476A (en) * | 2017-06-30 | 2019-01-15 | 东风（十堰）汽车管业有限公司 | A kind of hose pipe end blocks the device of leak test |
| CN109458515A (en) * | 2018-12-07 | 2019-03-12 | 中车西安车辆有限公司 | A kind of airtight plugging device of sampling line and method |
| CN213206944U (en) * | 2020-04-01 | 2021-05-14 | 福州振协管道有限公司 | A interior expanding end cap for pipeline leakproofness detects |
| CN112145859A (en) * | 2020-10-20 | 2020-12-29 | 张家港中集圣达因低温装备有限公司 | Pressure test plug |
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