CN215807132U - Plugging device for municipal pipeline port - Google Patents
Plugging device for municipal pipeline port Download PDFInfo
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- CN215807132U CN215807132U CN202120532484.XU CN202120532484U CN215807132U CN 215807132 U CN215807132 U CN 215807132U CN 202120532484 U CN202120532484 U CN 202120532484U CN 215807132 U CN215807132 U CN 215807132U
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Abstract
The utility model provides a plugging device for a municipal pipeline port, belongs to the technical field of municipal engineering, and effectively solves the problems that the existing municipal pipeline port plugging device is not tight in plugging, easy to lose and the like. This technical scheme include with pipeline complex slotting mechanism and shutoff piece, the slotting mechanism includes the burin of seting up the recess at the pipeline inner wall, and the burin is connected with rotary part, burin and ejector pad sliding fit, and the ejector pad is connected with reciprocating part, be provided with on the shutoff piece with recess complex sealing rubber ring. The utility model has the beneficial effects that: the utility model provides a convenient to use, the turnover of being convenient for can effectively carry out the device of municipal pipeline port shutoff.
Description
Technical Field
The utility model relates to the technical field of municipal engineering, in particular to a plugging device for a municipal pipeline port.
Background
Municipal pipeline is an important content in municipal engineering construction, municipal pipeline need carry out the shutoff at some port when detecting and process such as maintenance, the shutoff mode that mainly adopts at present chooses the shutoff gasbag to carry out the shutoff of pipeline port according to the pipeline condition, but gasbag formula plugging device exists the unsatisfactory condition that leaks of shutoff effect, gasbag plugging device easily consumes to damage the live time weak point, the manometer that gasbag plugging device is supporting in case breaks down and makes gasbag inflation pressure inaccurate and cause the shutoff failure, manual operation process easily the deviation causes the wrong shutoff effect unsatisfactory.
Therefore, how to solve the above technical problems becomes the subject of the present invention.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a novel multifunctional electric heating cooker which is convenient to use and turnover and can be effectively used
The device for plugging the municipal pipeline port.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a plugging device for a municipal pipeline port, which comprises a slotting mechanism and a plugging block, wherein the slotting mechanism is matched with a pipeline;
the grooving mechanism comprises a nicking tool for forming a groove on the inner wall of the pipeline, the nicking tool is connected with a rotating part, the nicking tool is in sliding fit with a push block, and the push block is connected with a reciprocating part;
a sealing rubber ring matched with the groove is arranged on the plugging block;
the grooving mechanism comprises a sleeve sleeved on the outer side of the pipeline, the rotating part comprises a bearing, the inner wall of one end of the sleeve is sleeved and attached to the outer ring of the bearing along the circumferential direction, and the sleeve is overlapped with the bearing and the central axis of the pipeline;
a rotating ring is sleeved on the inner ring of the bearing, the rotating ring is overlapped with the central axis of the bearing, two ends of the rotating ring are respectively positioned on the inner side and the outer side of the sleeve, one end of the rotating ring positioned on the inner side of the sleeve is connected with the graver, a first gear is sleeved on the outer wall of one end of the rotating ring positioned on the outer side of the sleeve, and the first gear is coaxial with the central rotating shaft of the rotating ring;
the first gear is meshed with the second gear, the second gear is fixedly connected with a worm, a central rotating shaft of the worm is coaxial with a central rotating shaft of the second gear, and the worm is coaxially connected with an output shaft of the motor.
The nicking tool comprises a tool handle, and a plurality of tool bits are fixedly connected with the tool handle;
the tool handle is of a right trapezoid structure, one end of the upper bottom of the tool handle is connected with the rotating ring in a sliding groove arranged at one end of the rotating ring located on the inner side of the sleeve in a sliding mode, and the sliding groove is formed in the radial direction of the rotating ring;
the inclined waist side of the cutter handle faces the inner side of the swivel, the straight waist side of the cutter handle is parallel to the central axis of the swivel, each cutter head is positioned on one side of the straight waist side of the cutter handle, and the cutting edge of each cutter head faces one side far away from the swivel;
the gravers are at least two and are uniformly arranged along the circumferential direction of one end of the rotating ring, which is positioned at the inner side of the sleeve.
The pushing block is in a circular truncated cone shape and is sleeved on the inner side of the rotating ring to be in sliding fit with the rotating ring, the central axis of the pushing block is overlapped with the central axis of the rotating ring, one end of the small bottom surface of the pushing block is located inside the sleeve, and one end of the large bottom surface of the pushing block is located outside the sleeve;
a plurality of small idler wheels are arranged on the bottom surface of one side of the oblique waist of each tool handle, and each idler wheel is attached to the push block and is matched with the outer wall of the push block in a rolling manner while one side of the oblique waist of the tool handle is matched with the push block in a sliding manner;
a plurality of reset springs are fixedly connected between the top of one side of the upper bottom of each knife handle and the inner wall of the top of the sliding groove.
The reciprocating component comprises a push rod, one end of the push rod is hinged to the central part of the large bottom surface of the push block, and one end of the push rod, which is far away from the push block, is sleeved on the outer side of the upright post and is in running fit with the upright post;
one end of the upright post is fixedly connected with the turntable, the upright post is positioned at one position of the turntable close to the outer edge, and the central axis of the upright post is parallel to that of the turntable;
a rotating rod is fixedly connected to the center of one side, away from the upright post, of the rotating disc, a central rotating shaft of the rotating rod is coaxial with the central rotating shaft of the rotating disc, a worm wheel is sleeved on the rotating rod, and the central rotating shaft of the worm wheel is coaxial with the central rotating shaft of the rotating rod;
the worm is provided with spiral teeth, and the spiral teeth are meshed with the external tooth block of the worm wheel.
The bushing is connected with the one end and the casing intercommunication of bearing, is located the sleeve pipe is outside the ejector pad with rotary part and reciprocating part all set up in the casing, the bull stick with the worm all rotate connect in the casing, be provided with the battery in the casing.
The casing is kept away from casing one side is provided with the handle, the bottom fixedly connected with adjustable flexible landing leg of casing, the casing outer wall is provided with shift knob.
The shutoff piece including stifled post, the external diameter of stifled post with the internal diameter cooperation of pipeline, a plurality of have been cup jointed in the outside of stifled post the rubber ring, each the equal joint cooperation of rubber ring has one the recess, the diameter of rubber ring slightly is greater than the internal diameter of pipeline, the circular base of one end fixedly connected with of stifled post, the central axis of stifled post with the central axis coincidence of base.
The base is connected to one side of the blocking column, a circular bottom groove concentric with the base is formed in the base, and the blocking column is fixedly connected to the bottom of the bottom groove;
the edge bottom groove inner wall and edge stifled post root part do not is provided with annular cushion, two distance between the cushion slightly is less than the thickness of pipeline.
When the utility model is actually used: firstly, selecting a plugging device which is matched with the pipeline port to be plugged, sleeving a sleeve of a slotting mechanism from the outer side of the pipeline port, placing the central axes of the sleeve and the pipeline at a superposed position through adjusting support legs to perform slotting, pressing a switch button to start a motor, driving a worm to rotate, driving a second gear to rotate, driving a first gear to rotate, driving a rotating ring to rotate by the first gear, driving a nicking tool to rotate by the rotating ring, starting a plurality of tool bits to rapidly rotate along the circumferential direction of the inner wall of the pipeline, pressing the tool bits close to the inner wall of the pipeline at an initial position, simultaneously driving the rotation of spiral teeth by the worm, driving the worm wheel to rotate by the spiral teeth, driving a rotating disc to rotate by the worm wheel, driving an upright post to rotate, driving a push rod and a push block connected with the push rod to do reciprocating motion back and forth, and pushing the nicking tool to the inner wall of the pipeline by the push block in the process of slowly pushing forward, the tool bit begins to carve into pipeline inner wall, the gyro wheel that sets up on the handle of a knife makes the ejector pad promote not influence the rotation of burin when the burin, while operating personnel accessible handle stabilizes grooving mechanism, accomplish behind the fluting after the rotatory many rings of burin, the ejector pad will be taken out by the push rod slowly to the outside, the tool bit also breaks away from with pipeline inner wall under the effect of spring, it puts aside grooving mechanism to close the motor, fill in the pipeline to the shutoff piece of adaptation, the tip and the kerve bottom laminating of pipeline, it is stable by the cushion extrusion simultaneously, each sealing rubber ring all will block into to a recess in, accomplish shutoff work promptly.
The utility model has the beneficial effects that:
1. the operation is flexible, convenient and accurate, the labor intensity of operators is reduced, and the situation of plugging failure is avoided to a great extent;
2. the number and the positions of the sealing rubber rings can be set according to requirements, and then the positions and the number of the gravers are matched, so that the two parts of the device can be flexibly configured;
3. the original sealing mode and structure are broken through, the sealing rubber ring is placed in the inner wall of the pipeline instead of the surface, and the plugging is more effective through excessive sealing;
drawings
FIG. 1 is a schematic view of the operation state of the slotting mechanism of the present invention.
Fig. 2 is a schematic view of a first-angle three-dimensional structure inside the slotting mechanism.
FIG. 3 is a schematic view of a second angle of the slotting mechanism according to the present invention.
Fig. 4 is a schematic perspective view of the block of the present invention.
Fig. 5 is a cross-sectional view of a block of the present invention mated to a pipe.
Wherein the reference numerals are: 1. a pipeline; 2. a plugging block; 201. plugging the column; 202. a base; 203. a bottom groove; 204. A rubber pad; 3. a groove; 4. Engraving; 401. A knife handle; 402. a cutter head; 403. A roller; 5. a push block; 6. a rubber ring; 7. a sleeve; 8. a bearing; 9. rotating the ring; 10. a first gear; 11. a second gear; 12. a worm; 13. a motor; 14. a chute; 15. a spring; 16. a push rod; 17. a column; 18. a turntable; 19. a rotating rod; 20. helical teeth; 21. A housing; 22. a handle; 23. a support leg; 24. a switch; 25. a worm gear.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
Referring to fig. 1 to 5, the utility model relates to a plugging device for municipal pipeline ports, which comprises a grooving mechanism and a plugging block 2, wherein the grooving mechanism is matched with a pipeline 1, the grooving mechanism comprises a nicking tool 4 for forming a groove 3 on the inner wall of the pipeline 1, the nicking tool 4 is connected with a rotating component, the nicking tool 4 is in sliding fit with a push block 5, the push block 5 is connected with a reciprocating component, and a sealing rubber ring 6 matched with the groove 3 is arranged on the plugging block 2.
The grooving mechanism comprises a sleeve 7 sleeved outside the pipeline 1, the rotating part comprises a bearing 8, the inner wall of one end of the sleeve 7 is sleeved and attached to the outer ring of the bearing 8 along the circumferential direction, the sleeve 7 coincides with the central axis of the bearing 8 and the pipeline 1, a swivel 9 is sleeved inside the bearing 8, the swivel 9 coincides with the central axis of the bearing 8, two ends of the swivel 9 are respectively located on the inner side and the outer side of the sleeve 7, one end of the swivel 9 located on the inner side of the sleeve 7 is connected with a nicking tool 4, the outer wall of one end of the outer side of the sleeve 7, located on the swivel 9, is sleeved with a first gear 10, the first gear 10 is coaxial with the central rotating shaft of the swivel 9, the first gear 10 is meshed with a second gear 11, the second gear 11 is fixedly connected with a worm 12, the central rotating shaft of the worm 12 is coaxial with the central rotating shaft of the second gear 11, and the worm 12 is coaxially connected with the output shaft of a motor 13.
Burin 4 includes handle of a knife 401, and a plurality of tool bits 402 of handle of a knife 401 fixedly connected with, handle of a knife 401 is the right trapezoid structure, and handle of a knife 401 upper base one end sliding connection is located in swivel 9 in the spout 14 that 7 inboard one ends of sleeve pipe set up, and spout 14 is seted up along swivel 9's radial direction, and handle of a knife 401 waist is on one side towards swivel 9's inboard, and handle of a knife 401 is straight waist on one side parallel with swivel 9's the central axis, and every tool bit 402 all is located handle of a knife 401 straight waist on one side, and the cutting edge of tool bit 402 all faces one side of keeping away from swivel 9, burin 4 is two at least, and evenly along the circumferencial direction range that swivel 9 is located the inboard one end of sleeve pipe 7.
The push block 5 is in a circular truncated cone shape, the inner side of the rotary ring 9 is sleeved with the push block 5 in a sliding fit with the rotary ring 9, the central axis of the push block 5 coincides with the central axis of the rotary ring 9, one end of the small bottom surface of the push block 5 is located inside the sleeve 7, one end of the large bottom surface of the push block 5 is located outside the sleeve 7, one side of the inclined waist of each knife handle 401 is provided with a plurality of small rollers 403, one side of the inclined waist of each knife handle 401 is in sliding fit with the push block 5, each roller 403 attached to the push block 5 is in rolling fit with the outer wall of the push block 5, and a plurality of reset springs 15 are fixedly connected between the top of the upper side of each knife handle 401 and the inner wall of the top of the sliding groove 14.
The reciprocating component comprises a push rod 16, one end of the push rod 16 is hinged to the central part of the large bottom surface of the push block 5, one end, far away from the push block 5, of the push rod 16 is sleeved on the outer side of the upright post 17 and is in running fit with the upright post 17, one end of the upright post 17 is fixedly connected with the turntable 18, the upright post 17 is located at a position, close to the outer edge, of the turntable 18, the central axis of the upright post 17 is parallel to the central axis of the turntable 18, the central position, far away from one side of the upright post 17, of the turntable 18 is fixedly connected with a rotating rod 19, the central rotating shaft of the rotating rod 19 is coaxial with the central rotating shaft of the turntable 18, the rotating rod 19 is sleeved with a worm wheel 25, the central rotating shaft of the worm wheel 25 is coaxial with the central rotating shaft of the rotating rod 19, a spiral tooth 20 is arranged on the worm 12, and the spiral tooth 20 is meshed with an external tooth block of the worm wheel 25.
The sleeve 7 is connected with one end of the bearing 8 and communicated with the shell 21, the push block 5, the rotating component and the reciprocating component which are positioned outside the sleeve 7 are arranged in the shell 21, the rotating rod 19 and the worm 12 are connected in the shell 21 in a rotating mode, and a storage battery is arranged in the shell 21. A handle 22 is arranged on one side of the shell 21 far away from the sleeve 7, an adjustable telescopic leg 23 is fixedly connected to the bottom of the shell 21, and a switch button 24 is arranged on the outer wall of the shell 21.
The plugging block 2 comprises a plugging column 201, the outer diameter of the plugging column 201 is matched with the inner diameter of the pipeline 1, the outer side of the plugging column 201 is sleeved with a plurality of rubber rings 6, each rubber ring 6 is clamped and matched with one groove 3, the diameter of each rubber ring 6 is slightly larger than the inner diameter of the pipeline 1, one end of the plugging column 201 is fixedly connected with a circular base 202, and the central axis of the plugging column 201 coincides with the central axis of the base 202. Base 202 is connected in stifled post 201 one side, and base 202 sets up the circular kerve 203 with base 202 concentric, and stifled post 201 fixed connection is in kerve 203 bottom, along the kerve 203 inner wall and along stifled post 201 root be provided with annular cushion 204 respectively, and the distance between two cushion 204 slightly is less than the thickness of pipeline 1.
When the utility model is actually used: firstly, selecting a plugging device which is matched with the port of a pipeline 1 to be plugged in according to the specification, sleeving a sleeve 7 of a slotting mechanism from the outer side of the port of the pipeline 1, placing the central axes of the sleeve 7 and the pipeline 1 at a superposed position through adjusting supporting legs 23 to perform slotting, pressing a button of a switch 24 to start a motor 13, driving a worm 12 to rotate by the motor 13, driving a second gear 11 to rotate by the worm 12, driving a first gear 10 to rotate by the second gear 11, driving a rotating ring 9 to rotate by the first gear 10, driving a nicking tool 4 to rotate by the rotating ring 9, starting rapid rotation of a plurality of tool bits 402 along the circumferential direction of the inner wall of the pipeline 1, pressing the tool bits 402 close to the inner wall of the pipeline 1 at an initial position, simultaneously driving rotation of a spiral tooth 20 by the rotation of the worm 12, driving a worm tooth 20 to rotate a worm wheel 25, driving a rotary disc 18 to rotate, driving a stand 17 to rotate, driving a push rod 16 and a push block 5 connected with the push rod 16 to perform reciprocating motion back and forth by the stand 17, the push block 5 slowly pushes the nicking tool 4 to the inner wall direction of the pipeline 1 in the process of slowly pushing forwards, the tool bit 402 starts to be engraved into the inner wall of the pipeline 1, the roller 403 arranged on the tool handle 401 enables the push block 5 to push the nicking tool 4 without influencing the rotation of the nicking tool 4, meanwhile, an operator can stabilize the slotting mechanism through the handle 22, after the nicking tool 4 completes slotting after rotating for multiple circles, the push block 5 is slowly taken out to the outer side by the push rod 16, the tool bit 402 is also separated from the inner wall of the pipeline 1 under the action of the spring 15, the slotting mechanism is moved away by closing the motor 13, the adaptive plugging block 2 is plugged into the pipeline 1, the end part of the pipeline 1 is attached to the bottom of the bottom groove 203 and is extruded and stabilized by the rubber gasket 204, and each sealing rubber ring 6 is clamped into one groove 3, so that plugging work is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A plugging device for municipal pipeline ports is characterized by comprising a slotting mechanism and a plugging block (2) which are matched with a pipeline (1);
the grooving mechanism comprises a nicking tool (4) with a groove (3) formed in the inner wall of the pipeline (1), the nicking tool (4) is connected with a rotating component, the nicking tool (4) is in sliding fit with a push block (5), and the push block (5) is connected with a reciprocating component;
a sealing rubber ring (6) matched with the groove (3) is arranged on the plugging block (2);
the grooving mechanism comprises a sleeve (7) sleeved on the outer side of the pipeline (1), the rotating component comprises a bearing (8), the inner wall of one end of the sleeve (7) is sleeved and attached to the outer ring of the bearing (8) along the circumferential direction, and the sleeve (7) is overlapped with the bearing (8) and the central axis of the pipeline (1);
a rotating ring (9) is sleeved on the inner ring of the bearing (8), the rotating ring (9) is overlapped with the central axis of the bearing (8), two ends of the rotating ring (9) are respectively positioned on the inner side and the outer side of the sleeve (7), one end of the rotating ring (9) positioned on the inner side of the sleeve (7) is connected with the graver (4), a first gear (10) is sleeved on the outer wall of one end of the rotating ring (9) positioned on the outer side of the sleeve (7), and the first gear (10) is coaxial with the central rotating shaft of the rotating ring (9);
the first gear (10) is meshed with the second gear (11), the second gear (11) is fixedly connected with a worm (12), a central rotating shaft of the worm (12) is coaxial with a central rotating shaft of the second gear (11), and the worm (12) is coaxially connected with an output shaft of a motor (13).
2. The plugging device for municipal pipeline ports according to claim 1, wherein the nicking tool (4) comprises a shank (401), the shank (401) having a plurality of cutting heads (402) fixedly attached thereto;
the knife handle (401) is of a right-angled trapezoid structure, one end of the upper bottom of the knife handle (401) is connected with the rotating ring (9) in a sliding groove (14) arranged at one end of the inner side of the sleeve (7) in a sliding mode, and the sliding groove (14) is formed in the radial direction of the rotating ring (9);
one side of the oblique waist of the cutter handle (401) faces the inner side of the rotating ring (9), one side of the straight waist of the cutter handle (401) is parallel to the central axis of the rotating ring (9), each cutter head (402) is positioned on one side of the straight waist of the cutter handle (401), and the cutting edge of each cutter head (402) faces one side far away from the rotating ring (9);
the gravers (4) are at least two and are uniformly arranged along the circumferential direction of one end of the rotating ring (9) positioned at the inner side of the sleeve (7).
3. The plugging device for the municipal pipeline port according to claim 2, wherein the pushing block (5) is truncated cone-shaped and is sleeved on the inner side of the rotating ring (9) to be in sliding fit with the rotating ring (9), the central axis of the pushing block (5) is coincident with the central axis of the rotating ring (9), one end of the small bottom surface of the pushing block (5) is located inside the sleeve (7), and one end of the large bottom surface of the pushing block (5) is located outside the sleeve (7);
a plurality of small rollers (403) are arranged on the bottom surface of one side of the inclined waist of each tool handle (401), and each roller (403) is attached to the push block (5) and is matched with the outer wall of the push block (5) in a rolling manner while one side of the inclined waist of each tool handle (401) is matched with the push block (5) in a sliding manner;
a plurality of reset springs (15) are fixedly connected between the top of the upper bottom edge of each knife handle (401) and the inner wall of the top of the sliding groove (14).
4. The plugging device for the municipal pipeline port according to claim 3, wherein the reciprocating member comprises a push rod (16), one end of the push rod (16) is hinged to the central part of the large bottom surface of the push block (5), and one end of the push rod (16) away from the push block (5) is sleeved outside the upright post (17) and is in running fit with the upright post (17);
one end of the upright post (17) is fixedly connected with the turntable (18), the upright post (17) is positioned at one position of the turntable (18) close to the outer edge, and the central axis of the upright post (17) is parallel to the central axis of the turntable (18);
a rotating rod (19) is fixedly connected to the center of one side, away from the upright post (17), of the rotating disk (18), the central rotating shaft of the rotating rod (19) is coaxial with the central rotating shaft of the rotating disk (18), a worm wheel (25) is sleeved on the rotating rod (19), and the central rotating shaft of the worm wheel (25) is coaxial with the central rotating shaft of the rotating rod (19);
the worm (12) is provided with spiral teeth (20), and the spiral teeth (20) are meshed with the external tooth block of the worm wheel (25).
5. The plugging device for municipal pipeline ports according to claim 4, wherein the end of the sleeve (7) to which the bearing (8) is connected communicates with a housing (21), the push block (5) and the rotating part and the reciprocating part outside the sleeve (7) are both disposed in the housing (21), the rotating rod (19) and the worm (12) are both rotatably connected in the housing (21), and a battery is disposed in the housing (21).
6. The plugging device for municipal pipeline ports according to claim 5, wherein a handle (22) is arranged on the side of the housing (21) away from the sleeve (7), an adjustable telescopic leg (23) is fixedly connected to the bottom of the housing (21), and a switch button (24) is arranged on the outer wall of the housing (21).
7. The plugging device for the municipal pipeline port according to claim 1, wherein the plugging block (2) comprises a plugging column (201), the outer diameter of the plugging column (201) is matched with the inner diameter of the pipeline (1), a plurality of rubber rings (6) are sleeved on the outer side of the plugging column (201), each rubber ring (6) is clamped and matched with one groove (3), the diameter of each rubber ring (6) is slightly larger than the inner diameter of the pipeline (1), a circular base (202) is fixedly connected to one end of the plugging column (201), and the central axis of the plugging column (201) coincides with the central axis of the base (202).
8. The plugging device for the municipal pipeline port according to claim 7, wherein the base (202) is connected to one side of the plugging column (201), the base (202) is provided with a circular bottom groove (203) concentric with the base (202), and the plugging column (201) is fixedly connected to the bottom of the bottom groove (203);
the inner wall of the bottom groove (203) and the root of the blocking column (201) are respectively provided with an annular rubber pad (204), and the distance between the two rubber pads (204) is slightly smaller than the thickness of the pipeline (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532484.XU CN215807132U (en) | 2021-03-15 | 2021-03-15 | Plugging device for municipal pipeline port |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532484.XU CN215807132U (en) | 2021-03-15 | 2021-03-15 | Plugging device for municipal pipeline port |
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| CN215807132U true CN215807132U (en) | 2022-02-11 |
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| CN202120532484.XU Active CN215807132U (en) | 2021-03-15 | 2021-03-15 | Plugging device for municipal pipeline port |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154177A (en) * | 2021-03-15 | 2021-07-23 | 中建八局第一建设有限公司 | Plugging device for municipal pipeline port |
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- 2021-03-15 CN CN202120532484.XU patent/CN215807132U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154177A (en) * | 2021-03-15 | 2021-07-23 | 中建八局第一建设有限公司 | Plugging device for municipal pipeline port |
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