CN221121442U - Natural gas pipeline plugging device - Google Patents
Natural gas pipeline plugging device Download PDFInfo
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- CN221121442U CN221121442U CN202323230807.8U CN202323230807U CN221121442U CN 221121442 U CN221121442 U CN 221121442U CN 202323230807 U CN202323230807 U CN 202323230807U CN 221121442 U CN221121442 U CN 221121442U
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- gas pipeline
- piece
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 239000003345 natural gas Substances 0.000 title claims abstract description 100
- 238000007789 sealing Methods 0.000 claims abstract description 139
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 238000009434 installation Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 238000011900 installation process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000001739 rebound effect Effects 0.000 description 1
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Abstract
The utility model relates to a natural gas pipeline plugging device, which is characterized in that a device is preliminarily fixed through the cooperation between a second locking ring and a second clamping plate, and the device is further fixed through the cooperation between a first locking ring, a first pressing plate, a sealing piece and a sliding rod, meanwhile, an elastic piece continuously provides pressure for a sealing plate, so that the sealing plate can be continuously pressed on a natural gas pipeline orifice, sealing structures on the sealing plate and the sealing plate can be further contacted with the natural gas pipeline orifice, the sealing pressure between the sealing plate and the natural gas pipeline orifice is larger, the sealing effect of the sealing piece and the natural gas pipeline orifice is improved, the installation mode is simple and quick, and the plugging efficiency of the natural gas pipeline is improved.
Description
Technical Field
The utility model relates to the technical field related to natural gas pipelines, in particular to a natural gas pipeline plugging device.
Background
In the installation and laying process of the natural gas pipeline, the pressure and leakage test is required to be carried out section by section on the installed pipeline, temporary plugging is carried out on the two ends of the natural gas pipeline through plugging devices, and the plugging devices are generally in butt joint with the end parts of the pipeline.
The patent publication No. CN210344702U discloses a natural gas pipeline plugging device, and it makes the screw rod promote the closing plate through rotating the cylindricality nut and removes, and the closing plate seals natural gas pipeline, and simultaneously, the closing plate can also drive the ring piece through the connecting plate and remove, and the ring piece gets into between cardboard and the natural gas pipeline, improves the fixed effect between cardboard and the natural gas pipeline.
However, in this way, the steps are complicated when the occluder is mounted on the end of a pipe. Firstly, when entering into between cardboard and the natural gas pipeline, the ring-shaped part probably receives the interference of cardboard, need be with the cardboard version to the card of the ring-shaped part of being convenient for of one side of keeping away from the natural gas pipeline, make the cardboard damage easily, furthermore, with the outer sleeve cover in the outside of guide bar, insert the through-hole in middle part and with screw rod threaded connection's in-process with the cylindricality nut, also need carry out accurate location to between guide bar, screw rod and outer sleeve, the cylindricality nut, otherwise be difficult to align, because the shielding of picture peg again for its alignment is unusual difficult. By adopting the mode, the operation is inconvenient, and the plugging efficiency of the natural gas pipeline is low.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a natural gas pipeline plugging device, which aims to solve the problems of inconvenient operation and low plugging efficiency of a natural gas pipeline when the plugging device is used for plugging.
The utility model provides a natural gas pipeline plugging device for solving the technical problems, which comprises an annular part, wherein at least two groups of guide holes are uniformly distributed on the annular part along the circumferential direction of the annular part, a first clamping plate which is uniformly distributed is arranged on one side wall of the annular part, a first locking ring is movably sleeved on the outer side of the first clamping plate, a second clamping plate which is uniformly distributed is arranged on the other side wall of the annular part, a second locking ring is movably sleeved on the outer side of the second clamping plate, the extrusion ends of the first clamping plate and the second clamping plate are mutually far away from each other, the inner wall of the locking ring is in threaded fit with the outer surface of the clamping plate, a sealing plate coaxial with the annular part is movably arranged on one side of the annular part, which is far away from the first clamping plate, a sliding hole corresponding to the guide hole is formed in the sealing plate, a sealing structure is further arranged on one side wall of the sealing plate, a ring-shaped sliding groove with a small bottom opening is formed in the first locking ring, a rotating ring is in sliding fit with at least two sliding rods, the other end of the sliding rod passes through the corresponding sliding rod, the sliding hole penetrates through the corresponding sliding hole and the limiting part, and the sealing plate is arranged between the limiting part and the elastic limiting part.
Further, the sealing structure comprises an inner ring and an outer ring which are arranged on the sealing plate, a sealing groove which is adapted to the pipe orifice of the pipeline is formed between the inner ring and the outer ring, and a flexible piece is arranged in the sealing groove.
Further, the flexible piece comprises a sealing outer ring pad arranged on the inner wall of the outer ring, a sealing inner ring pad arranged on the outer wall of the inner ring and a sealing ring pad arranged on the bottom wall of the sealing groove.
Further, the outer sealing ring gasket and the inner sealing ring gasket are arranged in a conical manner, the diameter of the outer peripheral wall surface of the inner sealing ring gasket is gradually increased from the free end to the fixed end of the inner sealing ring gasket, and the diameter of the inner peripheral wall of the outer sealing ring gasket is gradually increased from the free end to the fixed end of the outer sealing ring gasket.
Further, the limiting piece is arranged to be a limiting ring, and the elastic pieces are uniformly arranged along the circumferential direction of the limiting ring.
Further, the sliding rods are uniformly distributed along the circumferential direction of the first locking ring.
Further, the outer peripheral wall of the locking ring is provided with an anti-slip convex strip.
Further, an extension ring is arranged on the peripheral wall of the first locking ring, and the annular sliding groove is arranged on the extension ring.
Further, a limiting block which is bent outwards is arranged at the free end of the clamping plate.
When the sealing device is used, the first locking ring and the second locking ring are both positioned on one side close to the annular part, the sealing plate is pushed to move towards the limiting part, the elastic part is compressed, then the annular part is sleeved on the natural gas pipeline, and the sealing plate is propped against the natural gas pipeline at the moment, so that the sealing effect of the sealing device is better. Then, the second locking ring is rotated to move in a direction far away from the first locking ring, so that each second clamping plate contracts towards the direction of the natural gas pipeline, and the second clamping plates extrude the natural gas pipeline to preliminarily fix the annular piece and the natural gas pipeline; at this time, the sealing plate can be loosened, and the force applied to the sealing plate in the direction of the pipeline opening is applied due to the rebound effect of the elastic piece, so that the sealing plate is preliminarily pressed on the pipe orifice of the natural gas pipeline. And then, the first locking ring is rotated to move in the direction away from the first locking ring, so that each first clamping plate contracts towards the axis direction of the natural gas pipeline, the first clamping plates extrude the natural gas pipeline to further fix the annular part and the natural gas pipeline, and meanwhile, the first locking ring drives the limiting part to continuously move towards the pipe orifice direction of the natural gas pipeline through the sliding rod by limiting the guide hole on the annular part, and the elastic part is continuously compressed in the moving process of the limiting part, so that the elastic part continuously extrudes the sealing plate, and the sealing structure on the sealing plate seals the natural gas pipeline.
In summary, by adopting the plugging device, the sealing plate is pushed to compress the elastic piece, the annular piece is sleeved on the natural gas pipeline, the second locking ring is rotated to preliminarily fix the annular piece, and the first locking ring is rotated to complete the installation of the plugging device, so that the installation mode is simple; the whole device is integrally arranged, is convenient to transport and move, does not need to reinstall and position each part in the installation process, and improves the plugging efficiency of the natural gas pipeline. Furthermore, through the elastic component setting between locating part and the closing plate, the elastic component is continuous to provide pressure to the closing plate, makes it can continuously compress tightly on natural gas pipeline mouth of pipe, and is connected through the slide bar between first locking ring and the locating part, can further drive the locating part through removing first locking ring and to natural gas pipeline mouth of pipe and then provide bigger pressure for the elastic component to make the elastic component further provide thrust for the sealing member, make the sealing pressure between sealing member and the natural gas pipeline mouth of pipe bigger, improved the sealing effect of sealing member and natural gas pipeline's mouth of pipe.
The utility model will be further described with reference to the drawings and the specific examples.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged detail view of A of FIG. 1;
Fig. 3 is an enlarged detail view of B of fig. 1.
In the accompanying drawings: 1-ring-shaped piece, 11-first clamping plate, 12-first locking ring, 121-annular chute, 122-rotating ring, 123-extending ring, 13-second clamping plate, 14-second locking ring, 15-limiting block, 16-guide hole, 2-sealing plate, 21-slide hole, 22-inner ring, 23-outer ring, 24-sealing inner ring pad, 25-sealing outer ring pad, 26-sealing ring pad, 3-slide bar, 4-limit ring and 5-elastic piece.
Detailed Description
Specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings.
Referring to fig. 1-3, the present utility model provides an embodiment of a natural gas pipeline plugging device.
The utility model provides a natural gas pipeline plugging device, includes annular piece 1 and closing plate 2, and annular piece 1 is used for the cover to establish on natural gas pipeline, fixes a position closing plate 2's relative position. The utility model discloses a clamping ring, including ring 1, first cardboard 11, second cardboard 13, first cardboard 11 is equipped with evenly distributed's first cardboard 11 on the lateral wall of ring 1, the outside movable sleeve of second cardboard 13 is equipped with second locking ring 14, the extrusion end of first cardboard 11 and second cardboard 13 keeps away from each other and sets up, screw thread cooperation between the inner wall of locking ring and the surface of cardboard. Further, the outer peripheral wall of the locking ring is provided with an anti-slip raised line, so that the first locking ring 12 and the second locking ring 14 can be conveniently rotated, and slipping is avoided. Further, the free end of the clamping plate is provided with an outwards bent limiting block 15 for limiting the movement of the locking ring, so that the locking ring is prevented from being separated from the clamping plate, and the stability of the device is improved. The clamping plate comprises a straight arm section, an outward expansion end and an extrusion section, wherein the axial lead of the straight arm section is parallel to the axial lead of the natural gas pipeline, one end of the outward expansion section is fixed with the straight arm section, the other end of the outward expansion section is inclined towards the direction away from the natural gas pipeline, and the extrusion end is arranged at the outer end of the outward expansion section and extends towards the natural gas pipeline. Threads are arranged on the straight wall end and the outer peripheral wall of the outer expansion section, and the threads between the clamping plates form external threads matched with the internal threads on the inner peripheral wall of the locking ring.
When the device is used, as the inner wall of the locking ring is in threaded fit with the outer surface of the clamping plate, the second locking ring 14 is rotated firstly, so that the second locking ring 14 moves far away from the annular piece 1, the second locking ring 14 contracts between the second clamping plates 13, the outer wall of the natural gas pipeline is extruded, and then the annular piece 1 and the natural gas pipeline are primarily fixed; then the first locking ring 12 is rotated to move in a direction away from the first locking ring 12, each first clamping plate 11 is contracted towards the direction of the natural gas pipeline, the first clamping plates 11 press the natural gas pipeline to further fix the ring-shaped piece 1 and the natural gas pipeline, and in this way, the ring-shaped piece 1 can be fastened on the outer wall of the natural gas pipeline.
The ring-shaped part 1 is movably provided with a sealing plate 2 coaxial with the ring-shaped part 1 on one side far away from the first clamping plate 11, at least two groups of guide holes 16 uniformly distributed along the circumferential direction of the ring-shaped part 1 are arranged on the ring-shaped part 1, sliding holes 21 corresponding to the guide holes 16 are arranged on the sealing plate 2, an annular sliding groove 121 with a small bottom opening is arranged on the first locking ring 12, a rotating ring 122 is in sliding fit with the annular sliding groove 121, at least two sliding rods 3 are arranged on the rotating ring 122, and the other ends of the sliding rods 3 penetrate through the corresponding guide holes 16 and the sliding holes 21 to be fixed with a limiting part. Preferably, the sliding rods 3 are uniformly distributed along the circumferential direction of the first locking ring 12, so that the pulling force of the sliding rods 3 on the limiting piece can be uniform, and then the sealing pressure of the sealing plate 2 pressed on the natural gas pipeline opening can be uniform, so that the sealing effect is improved. Further, an extension ring 123 is disposed on the circumferential wall of the first locking ring 12, and the annular sliding groove 121 is disposed on the extension ring 123, at this time, the end face of the first locking ring 12 can be increased by the arrangement of the extension ring 123, so that the annular sliding groove 121 and the installation of the rotating ring 122 can be conveniently opened. Preferably, the sliding rods 3 are provided with four sliding rods, so that the sealing plate 2 and the limiting piece can be supported, and an operation space can be provided for rotating the second locking ring 14.
At this time, the arrangement of the first locking ring 12 and the first clamping plate 11 not only enables the annular piece 1 and the natural gas pipeline to be further fixed, but also enables the limiting piece to be driven to move towards the pipe orifice direction of the natural gas pipeline in the axial direction of the natural gas pipeline when the first locking ring 12 moves through the arrangement of the sliding rod 3, so that the sealing plate 2 is pushed to move towards the pipe orifice position of the natural gas pipeline, the sealing plate 2 can be abutted against the port of the pipeline, and the sealing of the natural gas pipeline is realized.
The guide hole 16 on the annular piece 1 and the slide hole 21 corresponding to the guide hole 16 on the sealing plate 2 can limit the slide rod 3, so that the slide rod can only move in the axial direction of the natural gas pipeline, the sealing plate 2 can only move in the axial direction of the natural gas pipeline, and dislocation between the sealing structure on the sealing plate 2 and the pipe orifice of the natural gas pipeline is avoided.
Through the arrangement of the annular sliding groove 121 on the first locking ring 12 and the rotating ring 122, when the first locking ring 12 is rotated, the first locking ring 12 also rotates relative to the rotating ring 122, the rotating ring 122 only moves along with the first locking ring 12 in the axial direction of the natural gas pipeline, and the sliding rod 3 drives the sealing plate 2 to move in the axial direction of the natural gas pipeline, so that the pipe orifice of the natural gas pipeline is plugged
An elastic piece 5 is arranged between the limiting piece and the sealing plate 2, so that the sealing plate 2 can be tightly pressed on the pipe orifice of the natural gas pipeline to seal the pipe orifice under the action of the elastic piece 5. Preferably, the locating part sets up to spacing ring 4, and the elastic component 5 is followed spacing ring 4's circumference is evenly arranged, at this moment, can be that elastic component 5 provides even extrusion dynamics for closing plate 2, and then makes the sealing pressure of closing plate 2 even, improves sealed effect. Preferably, the elastic member 5 employs a spring.
The sealing plate 2 is close to a side wall of the annular piece 1 and is further provided with a sealing structure, the sealing plate 2 is used for sealing a pipe orifice of a natural gas pipeline, and the sealing structure is used for further enhancing the sealing effect.
Further, the sealing structure comprises an inner ring 22 and an outer ring 23 which are arranged on the sealing plate 2, a sealing groove which is adapted to the pipe orifice of the pipeline is formed between the inner ring 22 and the outer ring 23, and a flexible piece is arranged in the sealing groove. When the sealing plate 2 is abutted against the pipe orifice of the natural gas pipeline, the pipe orifice is inserted into the sealing groove between the inner ring 22 and the outer ring 23, so that the plugging effect of the natural gas pipeline is improved.
Further, the flexible member includes a sealing outer ring pad 25 disposed on the inner wall of the outer ring 23, a sealing inner ring pad 24 disposed on the outer wall of the inner ring 22, and a sealing ring pad 26 disposed on the bottom wall of the sealing groove, in this way, when the sealing plate 2 continuously moves in the direction of the pipe orifice of the natural gas pipe, the pipe orifice of the natural gas pipe extrudes the sealing inner ring pad 24, the sealing outer ring pad 25, and the sealing ring pad 26, so that the sealing inner ring pad 24, the sealing outer ring pad 25, and the sealing ring pad 26 deform, thereby further improving the plugging effect.
Further, the opposite peripheral walls of the outer sealing ring pad 25 and the inner sealing ring pad 24 are tapered, the diameter of the outer peripheral wall of the inner sealing ring pad 24 gradually increases from the free end to the fixed end of the inner ring 22, and the diameter of the inner peripheral wall of the outer sealing ring pad 25 gradually decreases from the free end to the fixed end of the outer ring 23. By adopting the mode, as the width of the sealing groove is gradually reduced from outside to inside, when the pipe orifice of the natural gas pipeline is continuously inserted into the sealing groove, the extrusion force of the sealing outer ring gasket 25 and the sealing inner ring gasket 24 is increased, so that the sealing outer ring gasket and the sealing inner ring gasket generate larger deformation, and the sealing effect on the natural gas pipeline orifice is further improved.
When the sealing device is used, the first locking ring 12 and the second locking ring 14 are both positioned on one side close to the annular piece 1, the sealing plate 2 is pushed to move towards the limiting piece, the elastic piece 5 is compressed, then the annular piece 1 is sleeved on a natural gas pipeline and moves, the sealing plate 2 is abutted to the pipe orifice of the natural gas pipeline, and the pipe orifice of the natural gas pipeline is spliced in the sealing groove. It should be noted that, at this time, the sealing plate 2 is abutted against the natural gas pipeline to make the plugging effect of the device better, then the second locking ring 14 is rotated to move in a direction away from the first locking ring 12, so that each second clamping plate 13 contracts toward the natural gas pipeline, and the second clamping plates 13 squeeze the natural gas pipeline to make the ring-shaped member 1 and the natural gas pipeline preliminarily fixed; at this time, the sealing plate 2 is released, and the force applied to the pipe opening is applied to the sealing plate 2 due to the rebound of the elastic member 5, so that the natural gas pipe opening further moves into the sealing groove, and the inner sealing ring gasket 24, the outer sealing ring gasket 25 and the sealing ring gasket 26 are pressed to deform and perform primary sealing. Then, the first locking ring 12 is rotated to move in a direction away from the first locking ring 12, so that each first clamping plate 11 contracts in a direction of the natural gas pipeline, the first clamping plates 11 extrude the natural gas pipeline to further fix the annular part 1 and the natural gas pipeline, and meanwhile, the first locking ring 12 drives the limiting part to continuously move in a direction of the pipe orifice of the natural gas pipeline through the sliding rod 3 due to the limitation of the guide hole 16 on the annular part 1, the elastic part 5 is continuously compressed in the moving process of the limiting part, the elastic part 5 is further continuously extruded to the sealing plate 2, the sealing plate 2 is continuously moved to the pipe orifice of the natural gas pipeline, and the natural gas pipeline port continuously extrudes the flexible part, so that the sealing effect is further improved.
In summary, according to the utility model, the sealing plate 2 is pushed to compress the elastic member 5, the annular member 1 is sleeved on the natural gas pipeline, the second locking ring 14 is rotated to initially fix the annular member 1, and the first locking ring 12 is rotated to complete the installation of the plugging device, so that the installation mode is simple; the whole device is integrally arranged, is convenient to transport and move, does not need to reinstall and position each part in the installation process, and improves the plugging efficiency of the natural gas pipeline. Furthermore, through setting up the elastic component 5 between locating part and the closing plate 2, the elastic component 5 is continuous to provide pressure to closing plate 2, make it can continuously compress tightly on the natural gas pipeline mouth of pipe, and be connected through slide bar 3 between first locking ring 12 and the locating part, can further drive the locating part through removing first locking ring 12 and provide bigger pressure to the natural gas pipeline mouth of pipe and then for elastic component 5, thereby make elastic component 5 further provide thrust for the sealing member, make the sealing pressure between sealing member and the natural gas pipeline mouth of pipe bigger, improved the sealed effect of sealing member and natural gas pipeline's mouth of pipe.
The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. A natural gas pipeline plugging device is characterized in that,
Comprises an annular piece (1), wherein the annular piece (1) is provided with at least two groups of guide holes (16) which are uniformly distributed along the circumferential direction of the annular piece (1),
A first clamping plate (11) which is uniformly distributed is arranged on one side wall of the annular piece (1), a first locking ring (12) is movably sleeved on the outer side of the first clamping plate (11), a second clamping plate (13) which is uniformly distributed is arranged on the other side wall of the annular piece (1), a second locking ring (14) is movably sleeved on the outer side of the second clamping plate (13), the extrusion ends of the first clamping plate (11) and the second clamping plate (13) are mutually far away from each other, the inner wall of the locking ring is in threaded fit with the outer surface of the clamping plate,
A sealing plate (2) coaxial with the annular piece (1) is movably arranged on one side of the annular piece (1) far away from the first clamping plate (11), a sliding hole (21) corresponding to the guide hole (16) is arranged on the sealing plate (2), a sealing structure is further arranged on one side wall of the sealing plate (2) close to the annular piece (1),
The novel sealing device is characterized in that an annular chute (121) with a small bottom opening is arranged on the first locking ring (12), a rotating ring (122) is in sliding fit with the annular chute (121), at least two sliding rods (3) are arranged on the rotating ring (122), the other ends of the sliding rods (3) penetrate through corresponding guide holes (16) and slide holes (21) and are fixed with a limiting piece, and an elastic piece (5) is arranged between the limiting piece and the sealing plate (2).
2. The natural gas pipeline plugging device according to claim 1, wherein the sealing structure comprises an inner ring (22) and an outer ring (23) which are arranged on the sealing plate (2), a sealing groove which is adapted to a pipeline orifice is formed between the inner ring (22) and the outer ring (23), and a flexible piece is arranged in the sealing groove.
3. The natural gas pipeline plugging device according to claim 2, wherein the flexible member comprises a sealing outer ring gasket (25) provided on an inner wall of the outer ring (23), a sealing inner ring gasket (24) provided on an outer wall of the inner ring (22), and a sealing ring gasket (26) provided on a bottom wall of the sealing groove.
4. A natural gas pipeline plugging device according to claim 3, wherein the opposite peripheral wall surfaces of the sealing outer ring pad (25) and the sealing inner ring pad (24) are tapered, the diameter of the peripheral wall of the sealing inner ring pad (24) gradually increases from the free end to the fixed end of the inner ring (22), and the diameter of the inner peripheral wall of the sealing outer ring pad (25) gradually decreases from the free end to the fixed end of the outer ring (23).
5. A natural gas pipeline plugging device according to claim 1, wherein the limiting members are provided as limiting rings (4), and the elastic members (5) are uniformly arranged along the circumferential direction of the limiting rings (4).
6. A natural gas pipeline plugging device according to claim 1, wherein the slide bars (3) are evenly distributed along the circumference of the first locking ring (12).
7. The natural gas pipeline plugging device according to claim 1, wherein the peripheral wall of the locking ring is provided with anti-slip raised strips.
8. The natural gas pipeline plugging device according to claim 1, wherein an extension ring (123) is arranged on the peripheral wall of the first locking ring (12), and the annular chute (121) is arranged on the extension ring (123).
9. The natural gas pipeline plugging device according to claim 1, wherein the free end of the clamping plate is provided with an outwardly bent limiting block (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323230807.8U CN221121442U (en) | 2023-11-27 | 2023-11-27 | Natural gas pipeline plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323230807.8U CN221121442U (en) | 2023-11-27 | 2023-11-27 | Natural gas pipeline plugging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221121442U true CN221121442U (en) | 2024-06-11 |
Family
ID=91340090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323230807.8U Active CN221121442U (en) | 2023-11-27 | 2023-11-27 | Natural gas pipeline plugging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221121442U (en) |
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2023
- 2023-11-27 CN CN202323230807.8U patent/CN221121442U/en active Active
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