CN113719689B - Transformer pipeline sealing device - Google Patents
Transformer pipeline sealing device Download PDFInfo
- Publication number
- CN113719689B CN113719689B CN202110886255.2A CN202110886255A CN113719689B CN 113719689 B CN113719689 B CN 113719689B CN 202110886255 A CN202110886255 A CN 202110886255A CN 113719689 B CN113719689 B CN 113719689B
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- Prior art keywords
- sealing
- sealing cover
- pressing plate
- groove
- lock head
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/115—Caps
- F16L55/1157—Caps using hooks, pawls, or other movable or insertable locking members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a transformer pipeline sealing device; the invention comprises a lock head, a pressing plate and a sealing cover clamped between the lock head and the pressing plate; the lock head is provided with a screw rod towards one end of the sealing cover, the center of the sealing cover is provided with a through hole, one end of the pressing plate towards the sealing cover is provided with a thread groove, and the screw rod penetrates through the through hole and is in threaded connection with the thread groove; a groove is formed in one end, facing the pressing plate, of the sealing cover, a sliding limiting piece is arranged on the inner wall of the groove, and a sliding matching piece which slides in a matching way with the sliding limiting piece is arranged on the outer wall of one end, facing the sealing cover, of the pressing plate; the diameter of one end of the pressing plate, which faces the sealing cover, is matched with the diameter of the groove, and the diameter of one end of the pressing plate, which is far away from the sealing cover, is gradually increased until the diameter of the pressing plate is equal to that of the sealing cover, and a first sealing ring is sleeved on the waist of the pressing plate. The sealing cover and the pressing plate are pressed by the rotary lock head to be suitable for sealing all pipelines with the same pipe diameter, and the sealing device has the advantages of simplicity in operation, strong sealing performance, high reliability and better universality.
Description
Technical Field
The invention relates to the technical field of transformer overhaul, in particular to a transformer pipeline sealing device.
Background
When the transformer is overhauled, the pipeline with the accessories removed is required to be sealed. The prior technical proposal is that a sealing ring is arranged on the flange surface of the pipeline, a matched sealing plate is covered, the positions of screw holes are adjusted, four screws and nuts are arranged, and then the nuts are locked by a spanner, so as to realize the sealing of the pipeline. The disassembly and assembly of the sealing plates are complicated, the operation is long, two persons are required to cooperate to finish the assembly, larger manpower and material resources are consumed, the development of on-site work is not facilitated, meanwhile, the problems of mismatching sealing plate sizes and mismatching sealing plate screw holes are frequently encountered in the installation process, the universality is low, the problems of sealing ring running, loosening of nuts, loss of bolts and the like are easy to occur, the reliability of pipeline sealing is reduced, the pipeline is damped and permeated, and the working efficiency and the overhaul process of the transformer overhaul are affected.
Namely, the existing transformer pipeline sealing has the following problems:
(1) The process is complicated, and the consumed manpower and material resources are large;
(2) The reliability is low, and the problems of loosening of nuts, losing of bolts and the like are easy to occur, so that the pipeline is wetted and oil seeps;
(3) The commonality is low, often runs into shrouding size mismatch, screw mismatch's problem.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the transformer pipeline sealing device is provided, and the usability, the universality and the sealing reliability of the pipeline sealing device are improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a transformer pipeline sealing device comprises a lock head, a pressing plate and a sealing cover clamped between the lock head and the pressing plate;
the lock head is provided with a screw rod towards one end of the sealing cover, the center of the sealing cover is provided with a through hole, one end of the pressing plate towards the sealing cover is provided with a thread groove, and the screw rod penetrates through the through hole to be in threaded connection with the thread groove;
a groove is formed in one end, facing the pressing plate, of the sealing cover, a sliding limiting piece is arranged on the inner wall of the groove, and a sliding matching piece matched with the sliding limiting piece to slide is arranged on the outer wall of one end, facing the sealing cover, of the pressing plate;
the diameter of one end of the pressing plate, which faces the sealing cover, is matched with the diameter of the groove, the diameter of one end of the pressing plate, which faces away from the sealing cover, is gradually increased until the diameter of the pressing plate is equal to that of the sealing cover, and a first sealing ring is sleeved on the waist of the pressing plate.
The invention has the beneficial effects that: according to the invention, the pressing plate moves towards the direction of the locking head through the rotary locking head, the sliding limiting piece and the sliding matching piece, the inclined surface formed by increasing the diameters of the head and the tail of the pressing plate and the sealing cover are used for extruding the first sealing ring at the waist of the pressing plate, so that the first sealing ring is stressed to be tightly attached to the inner wall of a pipeline, the sealing is realized, the whole operation is simple, the sealing performance is strong, the operation time is short, the disassembly and assembly can be finished by only one person, the problems of loosening of screws, losing of bolts and the like do not exist, the wet oil seepage of the pipeline is caused, the sealing device is more reliable, and meanwhile, the sealing device is suitable for sealing all pipelines with the same pipe diameter, the problems of mismatching size of the sealing plate and mismatching of screw holes of the sealing plate do not occur, and the sealing plate has better universality.
Drawings
FIG. 1 is a schematic view of a transformer pipeline sealing device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a lock head structure of a transformer pipeline sealing device according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a seal cap of a transformer pipe seal device according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a platen structure of a transformer tube sealing device according to an embodiment of the present invention;
FIG. 5 is a left side view of a locking head of a transformer pipeline sealing device according to an embodiment of the present invention;
FIG. 6 is a right side view of a seal cap of a transformer conduit seal assembly according to an embodiment of the present invention;
FIG. 7 is a left side view of a platen of a transformer tubing sealing device according to an embodiment of the present invention;
description of the reference numerals:
1. a lock head; 2. an operating handle; 3. a screw; 4. a locking ring; 5. sealing cover; 6. a through hole; 7. a pressing plate; 8. a thread groove; 9. a cover rim; 10. a mating groove; 11. a second seal ring; 12. sealing grooves; 13. a third seal ring; 14. a groove; 15. a sliding limiting piece; 16. a sliding fit; 17. a first seal ring.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 7, a transformer pipeline sealing device comprises a lock head, a pressing plate and a sealing cover clamped between the lock head and the pressing plate;
the lock head is provided with a screw rod towards one end of the sealing cover, the center of the sealing cover is provided with a through hole, one end of the pressing plate towards the sealing cover is provided with a thread groove, and the screw rod penetrates through the through hole to be in threaded connection with the thread groove;
a groove is formed in one end, facing the pressing plate, of the sealing cover, a sliding limiting piece is arranged on the inner wall of the groove, and a sliding matching piece matched with the sliding limiting piece to slide is arranged on the outer wall of one end, facing the sealing cover, of the pressing plate;
the diameter of one end of the pressing plate, which faces the sealing cover, is matched with the diameter of the groove, the diameter of one end of the pressing plate, which faces away from the sealing cover, is gradually increased until the diameter of the pressing plate is equal to that of the sealing cover, and a first sealing ring is sleeved on the waist of the pressing plate.
From the above description, the beneficial effects of the invention are as follows: the invention makes the pressing plate move towards the direction of the lock head by rotating the lock head and sliding the limiting piece and the sliding matching piece, the inclined surface formed by increasing the diameters of the head and the tail of the pressing plate and the sealing cover are used for extruding the first sealing ring at the waist of the pressing plate, so that the first sealing ring is stressed to be tightly attached to the inner wall of the pipeline, the sealing is realized, the sealing ring acts on the inner wall of the pipeline, the device can be used for effectively sealing the pipelines with the same pipe diameter, avoids the problem that the pipelines with the same pipe diameter cannot be sealed due to inconsistent sizes of screw holes of flange surfaces of the pipelines, is suitable for sealing all the pipelines with the same pipe diameter, cannot solve the problems of unmatched sizes of the sealing plates and unmatched screw holes of the sealing plates, and has better universality. The whole operation is simple, the tightness is strong, the operation time is short, the disassembly and assembly can be completed by only one person, and the problems of screw loosening, bolt loss and the like do not exist, so that the pipeline is more reliable due to the fact that the pipeline is wetted and oil is leaked.
Further, a matching groove is formed in the center position of one end, facing the lock head, of the sealing cover, and the diameter of one side, facing the matching groove, of the lock head is matched with the matching groove.
According to the above description, the matching groove is formed, so that the lock head can penetrate into the matching groove to block the gap between the screw rod and the through hole part to a certain extent, and the tightness of the device is improved.
Further, a ring groove is formed in the tapered end, facing the sealing cover, of the tapered end around the screw rod, a second sealing ring corresponding to the ring groove is arranged on the tapered end, and the second sealing ring is extruded by the bottom of the matching groove, so that the second sealing ring deforms and clings to the bottom of the matching groove and the bottom of the ring groove.
From the above description, the end of the lock head, which faces the sealing cover, is provided with the ring groove around the screw rod, and the second sealing ring is arranged corresponding to the ring groove, and the bottom of the matching groove extrudes the second sealing ring, so that the second sealing ring clings to the lock head and the bottom of the matching groove, and the sealing performance of the device is further improved.
Further, one end of the sealing cover, which faces the lock head, is provided with a cover edge extending outwards in a surrounding mode.
From the above description, it is apparent that the end of the sealing cover facing the lock head is provided with a cover edge in a surrounding manner, so that the sealing cover cannot completely enter the pipeline, and the cover edge can seal the gap between the pipe orifice position and the sealing cover.
Further, the waist of the sealing cover is provided with a sealing groove in a surrounding mode, and a third sealing ring is sleeved at the sealing groove.
It can be seen from the above description that the waist of the sealing cover is surrounded with the sealing groove, and the third sealing ring is sleeved at the sealing groove, so that the sealing groove can prevent the sealing ring from sliding, and the sealing ring further seals the gap between the sealing cover and the inner wall of the pipeline.
Further, the lock head further comprises an operation handle, and the screw rod and the operation handle are coaxially connected towards the center of one end of the sealing cover.
From the above description, it is apparent that the operating handle connected with the screw is provided, so that the operator can use the device by hand more, and the usability of the device is improved.
Further, the operation handle is far away from the center of one end of the sealing cover is provided with a regular hexagon locking ring, and the locking ring is coaxially connected with the operation handle and the screw rod and is integrally formed.
According to the above description, the locking ring with the regular hexagon is further arranged, when the locking head can not be locked by the bare-handed rotation of the worker, the locking head can be further screwed by pulling the locking ring through a spanner, and the locking ring, the operation handle and the screw rod are integrally formed, so that the locking ring is more stable.
Further, the sliding limiting piece is a positioning chute, and the sliding matching piece is a positioning pin with the shape of the positioning chute being matched with that of the positioning chute.
From the above description, the pressing plate is prevented from rotating with the screw by the positioning chute and the positioning pin, and slides along the positioning chute toward the sealing cover when the screw rotates.
Referring to fig. 1 to 7, a first embodiment of the present invention is as follows:
the transformer pipeline sealing device comprises a lock head 1, a pressing plate 7 and a sealing cover 5 clamped between the lock head and the pressing plate as shown in figure 1;
as shown in fig. 2 and 5, the lock head 1 includes an operation handle 2, a screw rod 3, and a locking ring 4 of a regular hexagon, the operation handle 2 is connected with the screw rod 3 toward one end center of the sealing cover 5, and one end center far from the sealing cover 5 is connected with the locking ring 4, and the locking ring 4 is coaxially connected with the operation handle 2 and the screw rod 3, and is integrally formed. Not shown in the figures, one end of the lock head 1 facing the sealing cover 5 is provided with a ring groove around the screw 3, and is provided with a second sealing ring 11 corresponding to the ring groove.
As shown in fig. 3 and 6, the center of the sealing cover 5 is provided with a through hole 6, and as shown in fig. 1, 4 and 7, one end of the pressing plate 7 facing the sealing cover 5 is provided with a thread groove 8, and the screw 3 passes through the through hole 6 to be in threaded connection with the thread groove 8.
As shown in fig. 3 and 6, the outer wall of one end of the sealing cover 5 facing the lock head 1 is provided with a cover edge 9 extending outwards in a surrounding manner, and a matching groove 10 is arranged in the center. The diameter of one side of the operating handle 2 facing the matching groove 10 is matched with the matching groove 10, and the bottom of the matching groove 10 presses the second sealing ring 11, so that the second sealing ring 11 deforms and clings to the bottom of the matching groove 10 and the bottom of the ring groove.
As shown in fig. 1 and 3, the waist of the sealing cover 5 is provided with a sealing groove 12 in a surrounding manner, and a third sealing ring 13 is sleeved at the sealing groove 12.
As shown in fig. 3 and 6, a groove 14 is formed at one end of the sealing cover 5 facing the pressing plate 7, and a sliding limiting member 15 is arranged on the inner wall of the groove 14. As shown in fig. 1 and 7, one end of the pressing plate 7 facing the sealing cover 5 is provided with a sliding matching piece 16 which is matched with the sliding limiting piece 15 to slide on the outer wall, the diameter of one end of the pressing plate 7 facing the sealing cover 5 is matched with the diameter of the groove 14, and the diameter of the pressing plate 7 facing the end far away from the sealing cover 5 is increased gradually until the diameter of the pressing plate is equal to that of the sealing cover 5, and a first sealing ring 17 is sleeved on the waist of the pressing plate 7.
In this embodiment, the sliding limiting member 15 is a positioning chute, and the sliding matching member 16 is a positioning pin with a shape matching the positioning chute.
From this, the implementation procedure of this embodiment is as follows:
as shown in fig. 1, the tapered end 1 of the transformer pipeline sealing device is plugged into a pipeline to be sealed outwards until the cover edge 9 of the sealing cover 5 clamps a pipe orifice, at the moment, the tapered end 1 is rotated by holding the operating handle 2 by hand, and the locking ring 4 is pulled by a spanner or the combination of the two modes, so that the pressing plate 7 moves towards the sealing cover 5 along the matching of the positioning sliding groove and the positioning pin, the inclined surface formed by increasing the diameters of the head and the tail on the pressing plate 7 and the sealing cover 5 extrude the first sealing ring 17, and the first sealing ring 17 is compressed and deformed to seal. Meanwhile, the second sealing ring 11 is pressed to be tightly attached to the lock head 1 and the sealing cover 5 because the lock head 1 is locked and moves towards the sealing cover 5, and the positions of the screw 3 and the through hole 6 are sealed. The third seal ring 13 is used to further improve the sealability.
In summary, according to the transformer pipeline sealing device provided by the invention, the tapered end is rotated, the pressing plate moves towards the tapered end through the sliding limiting piece and the sliding matching piece, and the inclined surface formed by increasing the diameters of the head and the tail of the pressing plate and the sealing cover are used for extruding the first sealing ring at the waist of the pressing plate, so that the first sealing ring is stressed to be tightly attached to the inner wall of a pipeline, and the sealing applicable to all pipelines with the same pipe diameter is realized; meanwhile, the waist of the sealing cover is provided with the sealing groove, the sealing ring is sleeved, the lock head is provided with the ring groove at the position surrounding the screw rod, and the sealing ring is arranged, namely three sealing rings are designed together, so that the sealing performance of the device is greatly improved. The locking ring, the operating handle and the screw rod are integrally designed, and a user can realize the quick disassembly and assembly of the sealing device through the locking ring or the operating handle. The whole operation is simple, the operation time consumption is short, the disassembly and assembly can be completed only by a single person, and the problems of screw loosening, bolt loss and the like do not exist, so that the pipeline is affected with damp and oil seepage, and the sealing device is more reliable, meanwhile, is applicable to sealing all pipelines with the same pipe diameter, does not have the problems of mismatching of the size of the sealing plate and mismatching of screw holes of the sealing plate, and has better universality.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (4)
1. The transformer pipeline sealing device is characterized by comprising a lock head, a pressing plate and a sealing cover clamped between the lock head and the pressing plate;
the lock head is provided with a screw rod towards one end of the sealing cover, the center of the sealing cover is provided with a through hole, one end of the pressing plate towards the sealing cover is provided with a thread groove, and the screw rod penetrates through the through hole to be in threaded connection with the thread groove;
a groove is formed in one end, facing the pressing plate, of the sealing cover, a sliding limiting piece is arranged on the inner wall of the groove, and a sliding matching piece matched with the sliding limiting piece to slide is arranged on the outer wall of one end, facing the sealing cover, of the pressing plate;
the sliding limiting piece is a positioning chute, and the sliding matching piece is a positioning pin matched with the positioning chute in shape;
one end of the sealing cover, which faces the lock head, is provided with a cover edge extending outwards in a surrounding manner;
the diameter of one end of the pressing plate, which faces the sealing cover, is matched with the diameter of the groove, and the diameter of one end of the pressing plate, which is far away from the sealing cover, is increased gradually until the diameter of the pressing plate is equal to that of the sealing cover, and a first sealing ring is sleeved at the waist part of the pressing plate;
the sealing cover is provided with a matching groove towards the center of one end of the lock head, the lock head also comprises an operation handle, the diameter of one side of the lock head towards the matching groove is matched with the matching groove, and the diameter of one side of the lock head away from the matching groove is increased gradually until the diameter of the side of the lock head towards the matching groove is equal to the diameter of one side of the operation handle;
the tapered end towards the one end of sealed lid winds the screw rod is equipped with the circle groove to be equipped with the correspondence the second sealing washer in circle groove, cooperation groove tank bottom extrusion the second sealing washer makes second sealing washer deformation and hugs closely cooperation groove tank bottom and circle groove tank bottom.
2. The transformer pipeline sealing device according to claim 1, wherein the waist of the sealing cover is provided with a sealing groove in a surrounding mode, and a third sealing ring is sleeved at the sealing groove.
3. A transformer conduit sealing device according to claim 1, wherein said screw is coaxially connected to said operating handle toward a center of one end of said sealing cap.
4. A transformer pipeline sealing device according to claim 3, wherein a locking ring of a regular hexagon is arranged at the center of one end of the operating handle far away from the sealing cover, and the locking ring is coaxially connected with the operating handle and the screw rod and is integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110886255.2A CN113719689B (en) | 2021-08-03 | 2021-08-03 | Transformer pipeline sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110886255.2A CN113719689B (en) | 2021-08-03 | 2021-08-03 | Transformer pipeline sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113719689A CN113719689A (en) | 2021-11-30 |
| CN113719689B true CN113719689B (en) | 2023-08-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110886255.2A Active CN113719689B (en) | 2021-08-03 | 2021-08-03 | Transformer pipeline sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113719689B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3450298A (en) * | 1967-06-24 | 1969-06-17 | Rheinstahl Huettenwerke Ag | Fast releasing connection for high pressure container parts |
| GB1261010A (en) * | 1969-04-28 | 1972-01-19 | Euratom | Pipe plug |
| US5035265A (en) * | 1989-12-28 | 1991-07-30 | Chen Chung F | Structure of pipe plug |
| JPH09217888A (en) * | 1996-02-13 | 1997-08-19 | Retsukisu Kogyo Kk | Airtight tool for pipe |
| AU7200898A (en) * | 1997-05-09 | 1998-12-08 | Steblina Holdings Pty Limited | Sealing device |
| CN2512976Y (en) * | 2001-12-20 | 2002-09-25 | 新疆五家渠公众信息产业有限责任公司 | Pipeline blocking device |
| CN204187168U (en) * | 2014-10-20 | 2015-03-04 | 李明康 | A kind of pipe fitting connects seal arrangement |
| CN204267977U (en) * | 2014-11-04 | 2015-04-15 | 国网浙江富阳市供电公司 | A kind of seal for pipe joints plug |
| CN205078953U (en) * | 2015-09-30 | 2016-03-09 | 山东普惠新能源科技有限公司 | Pipeline connector |
| CN205842090U (en) * | 2016-07-21 | 2016-12-28 | 厦门爱陶卫浴有限公司 | A kind of pipe stopper |
| CN206468985U (en) * | 2016-12-26 | 2017-09-05 | 中国核工业二三建设有限公司 | Hydraulic test of pipeline plugging device |
| CN107314187A (en) * | 2017-08-31 | 2017-11-03 | 张辉 | A kind of pipeline sealing device |
| CN107420543A (en) * | 2017-08-17 | 2017-12-01 | 泰豪科技股份有限公司 | A kind of sheet-metal duct sealing device |
| KR101914713B1 (en) * | 2017-05-12 | 2018-11-05 | 오현식 | Closed cap for of sewer line drainage |
| CN210461678U (en) * | 2019-08-29 | 2020-05-05 | 张家港市江南锅炉压力容器有限公司 | Sealing device for pressure test of pressure vessel forging connecting pipe |
-
2021
- 2021-08-03 CN CN202110886255.2A patent/CN113719689B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3450298A (en) * | 1967-06-24 | 1969-06-17 | Rheinstahl Huettenwerke Ag | Fast releasing connection for high pressure container parts |
| GB1261010A (en) * | 1969-04-28 | 1972-01-19 | Euratom | Pipe plug |
| US5035265A (en) * | 1989-12-28 | 1991-07-30 | Chen Chung F | Structure of pipe plug |
| JPH09217888A (en) * | 1996-02-13 | 1997-08-19 | Retsukisu Kogyo Kk | Airtight tool for pipe |
| AU7200898A (en) * | 1997-05-09 | 1998-12-08 | Steblina Holdings Pty Limited | Sealing device |
| CN2512976Y (en) * | 2001-12-20 | 2002-09-25 | 新疆五家渠公众信息产业有限责任公司 | Pipeline blocking device |
| CN204187168U (en) * | 2014-10-20 | 2015-03-04 | 李明康 | A kind of pipe fitting connects seal arrangement |
| CN204267977U (en) * | 2014-11-04 | 2015-04-15 | 国网浙江富阳市供电公司 | A kind of seal for pipe joints plug |
| CN205078953U (en) * | 2015-09-30 | 2016-03-09 | 山东普惠新能源科技有限公司 | Pipeline connector |
| CN205842090U (en) * | 2016-07-21 | 2016-12-28 | 厦门爱陶卫浴有限公司 | A kind of pipe stopper |
| CN206468985U (en) * | 2016-12-26 | 2017-09-05 | 中国核工业二三建设有限公司 | Hydraulic test of pipeline plugging device |
| KR101914713B1 (en) * | 2017-05-12 | 2018-11-05 | 오현식 | Closed cap for of sewer line drainage |
| CN107420543A (en) * | 2017-08-17 | 2017-12-01 | 泰豪科技股份有限公司 | A kind of sheet-metal duct sealing device |
| CN107314187A (en) * | 2017-08-31 | 2017-11-03 | 张辉 | A kind of pipeline sealing device |
| CN210461678U (en) * | 2019-08-29 | 2020-05-05 | 张家港市江南锅炉压力容器有限公司 | Sealing device for pressure test of pressure vessel forging connecting pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113719689A (en) | 2021-11-30 |
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