CN111237582A - Layered progressive type non-pressure-relief pipeline leakage stopper - Google Patents
Layered progressive type non-pressure-relief pipeline leakage stopper Download PDFInfo
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- CN111237582A CN111237582A CN202010034537.5A CN202010034537A CN111237582A CN 111237582 A CN111237582 A CN 111237582A CN 202010034537 A CN202010034537 A CN 202010034537A CN 111237582 A CN111237582 A CN 111237582A
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- pipeline
- pressure
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- glue
- hole
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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
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
- F16L55/172—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose the ring, band or sleeve being tightened by a tangentially arranged threaded pin and a nut
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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
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/175—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by using materials which fill a space around the pipe before hardening
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to the technical field of pipeline rush-repair equipment, and discloses a layered progressive non-pressure-relief pipeline leaking stopper which comprises a conveying pipeline, wherein an upper sealing mechanism and a lower sealing mechanism are respectively arranged at the upper end and the lower end of a through hole on the outer surface of the conveying pipeline, the upper sealing mechanism and the lower sealing mechanism are fixedly connected through a hexagon bolt, and sealing glue screw channels I are fixedly arranged on the left side and the right side of an inner cavity of an upper sealing pressing plate. This layering is formula of not releasing pressure pipeline leaking stoppage ware step by step, through the setting of pressure release passageway in the last holding down plate, can utilize pressure release passageway to carry the fluid pressure of the leakage in the through-hole on the pipeline out through the pressure release passageway discharge, later the rethread injecting glue through-hole to this leaking stoppage ware in fill sealed glue make its and pipeline's surface can be inseparable laminating together, make it have higher bearing capacity in order to prevent that the through-hole on the pipeline from taking place the problem of leaking again under the effect of high pressure transport, stability and reliability are higher.
Description
Technical Field
The invention relates to the technical field of pipeline rush-repair equipment, in particular to a layered progressive type non-pressure-relief pipeline leakage stopper.
Background
Pipeline transportation is used as a main transportation mode of liquid or gas, has the advantages of high transportation speed, long span distance and high safety and reliability compared with other transportation modes, and is often used for long-distance transportation of operations such as oil, natural gas, water supply and drainage and the like, but in the process of transporting liquid or gas by using a long distance of a pipeline, due to the fact that the uniformity of the material of the pipeline and the outside are affected by corrosion of different degrees, the phenomena of corrosive perforation, sand holes or cracking and the like appear on the surface of the pipeline in the past, and further the phenomenon of leakage of the transported liquid or gas is caused, so that the pipeline with the corrosive perforation, sand holes or cracking needs to be subjected to timely emergency repair operation in order to ensure normal operation of pipeline transportation.
However, the corrosive perforation, sand hole or cracking of the pipeline has high burstiness, and the pipeline cannot be timely and effectively notified to each enterprise or user in the face of a large-scale conveying environment, so that the pipeline leaking stopper is required to perform emergency repair plugging on the pipeline at the leaking position under the condition of no pressure release so as to prevent the gas from continuously leaking the liquid.
When the existing plugging device is used for plugging corrosive perforation, sand hole or crack on a pipeline, the sealing device is only closely attached to the outer surface of the pipeline by simply extruding the rubber sealing ring inside the sealing device to realize the sealing operation of the leakage part of the pipeline, however, the pressure that can be withstood in this way is relatively small, and in the face of some high-pressure transport pipes, the high pressure of the leaked fluid can continuously extrude the rubber sealing ring, thereby causing the rubber sealing ring to generate irregular deformation and generate the phenomena of gap and leakage, leading the plugging effect and the stability of the whole plugging device to be poor, and life is shorter, need often overhaul or change rubber seal wherein, waste time and energy and the effect is low, so, need a neotype pipeline leaking stoppage ware urgently, can stabilize effectual pipeline to leaking and carry out the shutoff operation of not letting out pressure.
Disclosure of Invention
Technical problem to be solved
The invention provides a layered progressive type pipeline leakage stopper without pressure relief, which has the advantages of strong bearing capacity, good plugging effect, higher stability and reliability and long service life, and solves the problems that when the existing leakage stopper performs plugging operation on corrosive perforation, sand hole or crack on a pipeline, the existing leakage stopper only extrudes a rubber sealing ring inside the existing leakage stopper to be tightly attached to the outer surface of the pipeline by extruding the rubber sealing ring to realize the plugging operation on a leakage position of the pipeline, but the mode can bear lower pressure, and when the existing leakage stopper faces some pipelines transported under high pressure, the high pressure of leakage fluid can continuously extrude the rubber sealing ring to further cause irregular deformation to generate gaps and leakage, so that the plugging effect and stability of the whole leakage stopper are poor, and the service life is shorter.
(II) technical scheme
The invention provides the following technical scheme: a layered progressive type non-pressure-relief pipeline leakage stopper comprises a conveying pipeline, an upper sealing mechanism and a lower sealing mechanism, wherein the upper end and the lower end of a through hole on the outer surface of the conveying pipeline are respectively provided with the upper sealing mechanism and the lower sealing mechanism, and the upper sealing mechanism is fixedly connected with the lower sealing mechanism through a hexagon bolt;
the upper sealing mechanism comprises an upper sealing plate, sealing rubber screw channels I are fixedly mounted on the left side and the right side of an inner cavity of the upper sealing plate, a pressure relief channel is arranged in the middle of the inner cavity of the upper sealing plate and between the two groups of upper sealing plates, rubber relief through holes are formed in the middle of the inner cavity of the upper sealing plate and on the two sides of the pressure relief channel, a connecting return groove I is formed in the front of the upper sealing plate and on the periphery of the sealing rubber screw channel I, and rubber injection through holes are formed in the left end and the right end of the upper sealing plate;
the lower sealing mechanism comprises a lower sealing plate, sealing glue screw channels II are fixedly mounted on the left side and the right side of an inner cavity of the lower sealing plate, and connecting return grooves II are formed in the front face of the lower sealing plate and located on the periphery of the sealing glue screw channels II.
Preferably, the inner diameter of the sealing rubber screw channel I is equal to the outer diameter of the conveying pipeline, the spiral directions of the two groups of sealing rubber screw channels I or the two groups of sealing rubber screw channels II are opposite, and the spiral tracks between the corresponding sealing rubber screw channels I and the corresponding sealing rubber screw channels II are the same.
Preferably, the both sides of pressure release passageway bottom all are equipped with the through-going formula of type of dogbone and lead to the groove and be linked together with the inner chamber of last pressure sealing board, and pressure release passageway's internal diameter is less than pipeline's external diameter 1 ~ 2 millimeters, is equipped with the thread sealing bolt simultaneously at pressure release passageway's top.
Preferably, the inner walls of the two ends of the upper sealing plate and the lower sealing plate are respectively provided with elastic sealant, and the inner diameter of the elastic sealant is smaller than the outer diameter of the conveying pipeline by 1-3 mm.
Preferably, the inner diameter of the glue injection through hole is three times that of the glue discharge through hole, and a sealing plug matched with the glue injection through hole is arranged in the glue injection through hole.
(III) advantageous effects
The invention has the following beneficial effects:
1. this layering is formula of not releasing pressure pipeline leaking stoppage ware step by step, through the setting of pressure release passageway in the last holding down plate, can utilize pressure release passageway to carry the fluid pressure of the leakage in the through-hole on the pipeline out through the pressure release passageway discharge, later the rethread injecting glue through-hole to this leaking stoppage ware in fill sealed glue make its and pipeline's surface can be inseparable laminating together, make it have higher bearing capacity in order to prevent that the through-hole on the pipeline from taking place the problem of leaking again under the effect of high pressure transport, stability and reliability are higher.
2. This layering is formula of not releasing pressure pipeline leaking stoppage ware that advances one by one, through the setting of sealing a glue screw way I and II spiral trails of the spiral of glue screw way, when utilizing the injecting glue to fill the colloid to the via hole to it, make the colloid can be along the slow advancing of the orbit of spiral, thereby can be with the continuous release from leaking the gluey through-hole of air in this leaking stoppage ware of stability, avoided in the sealing colloid because of the existence of bubble lead to its problem of stability variation, the setting to spiral orbit sealing a glue screw way I and pressure release channel simultaneously, can effectual improvement this leaking stoppage ware the compressive capacity, make it difficult emergence deformation under fluidic high-pressure effect, and then the effectual life who improves this leaking stoppage ware.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of an explosive structure according to the present invention;
FIG. 3 is a schematic structural diagram of a sealing mechanism according to the present invention;
fig. 4 is a schematic structural diagram of the bottom sealing mechanism of the present invention.
In the figure: 1. a delivery conduit; 2. an upper sealing mechanism; 21. an upper sealing pressure plate; 22. sealing a glue screw channel I; 23. a pressure relief channel; 24. a glue-releasing through hole; 25. connecting the return groove I; 26. injecting glue through holes; 3. a lower sealing mechanism; 31. a lower sealing pressure plate; 32. sealing a glue screw channel II; 33. and is connected back to the groove II.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a layered progressive leak stopper for a pipeline without pressure relief comprises a conveying pipeline 1, an upper sealing mechanism 2 and a lower sealing mechanism 3, wherein the upper end and the lower end of a through hole on the outer surface of the conveying pipeline 1 are respectively provided with the upper sealing mechanism 2 and the lower sealing mechanism 3, and the upper sealing mechanism 2 is fixedly connected with the lower sealing mechanism 3 through a hexagon bolt;
the upper sealing mechanism 2 comprises upper sealing pressing plates 21, sealing glue screw channels I22 are fixedly mounted on the left side and the right side of an inner cavity of each upper sealing pressing plate 21, a pressure relief channel 23 is arranged in the middle of the inner cavity of each upper sealing pressing plate 21 and between the two groups of upper sealing pressing plates 21, glue relief through holes 24 are formed in the middle of the inner cavity of each upper sealing pressing plate 21 and on the two sides of the pressure relief channel 23, connecting return grooves I25 are formed in the front of each upper sealing pressing plate 21 and on the periphery of the corresponding sealing glue screw channel I22, and glue injection through holes 26 are formed in the left end and the right end of each upper;
the lower sealing mechanism 3 comprises a lower sealing pressing plate 31, sealing glue screw channels II 32 are fixedly mounted on the left side and the right side of an inner cavity of the lower sealing pressing plate 31, and connecting return grooves II 33 are formed in the front face of the lower sealing pressing plate 31 and located on the periphery of the sealing glue screw channels II 32.
Wherein, the setting of pressure release channel 23 in last holding down plate 21, can utilize pressure release channel 23 to go up the fluid pressure of the leakage in the through-hole on pipeline 1 and discharge away through pressure release channel 23, later the rethread seals a rubber screw way I22 and injecting glue through-hole 26 and makes it together with the inseparable laminating of pipeline 1's surface to filling sealed glue in this leaking stoppage ware, prevent that the through-hole on pipeline 1 from taking place the problem of leaking again under the effect of high pressure transport, stability and reliability are higher.
In the technical scheme, the inner diameter of the sealing glue screw channel I22 is equal to the outer diameter of the conveying pipeline 1, the spiral directions of the two groups of sealing glue screw channels I22 or the two groups of sealing glue screw channels II 32 are opposite, and the spiral tracks between the corresponding sealing glue screw channels I22 and the corresponding sealing glue screw channels II 32 are the same.
Wherein, to the setting of sealing glue screw way I22 and the II 32 spiral orbit of sealing glue screw way, when utilizing injecting glue through-hole 26 to fill it with the colloid, make the colloid can slowly impel along the orbit of spiral, thereby can be with the continuous release of air in this leaking stoppage ware of stabilizing in leaking out gluey through-hole 24, avoided in the sealing colloid because of the existence of bubble lead to its problem of stability variation, and to the setting of spiral orbit sealing glue screw way I22 and pressure release channel 23, can effectual improvement its holistic compressive capacity, make it difficult emergence deformation under fluidic high-pressure effect, further improvement the stability and the reliability of this leaking stoppage ware.
In this technical scheme, the both sides of pressure release channel 23 bottom all are equipped with the through-type that runs through of type of dogbone and lead to the inner chamber that is linked together with last pressure plate 21, and pressure release channel 23's internal diameter is less than 1 ~ 2 millimeters of pipeline 1's external diameter, is equipped with the thread sealing bolt simultaneously at pressure release channel 23's top.
Wherein, to the setting of pressure release channel 23 for this leaking stoppage ware can be in the same place the inseparable connection between pressure release channel 23 and the colloid when filling the colloid, is difficult for taking place the phenomenon of leaking once more, and to the setting of its internal diameter, makes it can effectually avoid the fluid in pipeline 1 to enter into and seal in glue screw channel I22 or seal in glue screw channel II 32 when installing this leaking stoppage ware, in order to prevent that corrosive substance wherein from causing the influence to the stability of the sealed colloid of filling.
In this technical scheme, all be equipped with the spraying elasticity on the inner wall at last pressure board 21 and the pressure board 31 both ends down and seal sealed glue, and the sealed internal diameter that glues of elasticity is less than pipeline 1's external diameter 1 ~ 3 millimeters.
Wherein, the inner walls at the two ends of the upper sealing plate 21 and the lower sealing plate 31 are arranged, so that the upper sealing plate and the lower sealing plate can be tightly attached to the outer surface of the conveying pipeline 1, thereby preventing the phenomenon of insufficient filling due to glue leakage in the process of filling the glue into the leak stopper.
In the technical scheme, the inner diameter of the glue injection through hole 26 is three times that of the glue discharge through hole 24, and a sealing plug matched with the glue injection through hole 26 is arranged in the glue injection through hole.
Wherein, to the setting of injecting glue through-hole 26 and leaking the gluey through-hole 24 internal diameter for injecting glue through-hole 26 when filling the sealing colloid with certain flow, the colloid pressure that causes wherein is great because of leaking the flow of gluey through-hole 24 is less when being full of the colloid in this leaking stoppage ware, and then ensures that the pressure of the colloid that this leaking stoppage ware was filled is great, compactness is higher.
The use method and the working principle of the embodiment are as follows:
firstly, finding the position of a through hole on a conveying pipeline 1, polishing the surface of the through hole on the conveying pipeline 1 by using sand paper, aligning a pressure relief channel 23 on an upper sealing pressure plate 21 with the through hole on the conveying pipeline 1, fixing the upper sealing pressure plate 21 and a lower sealing pressure plate 31 on the outer surface of the conveying pipeline 1 by using a hexagon bolt, so that fluid leaked in the conveying pipeline 1 can be discharged from the pressure relief channel 23, then injecting sealing colloid into the space between the upper sealing pressure plate 21 and the lower sealing pressure plate 31 from a glue injection through hole 26 by using a pressure pump, enabling the sealing colloid to be pushed forwards along the spiral tracks of a sealing colloid screw channel I22 and a sealing colloid screw channel II 32, continuously discharging air in the sealing colloid from the glue injection through hole 24, stopping glue injection by using the pressure pump after the colloid is discharged from the glue injection through hole 24, sealing the sealing through hole 26 by using a sealing plug, waiting for a period of time and the like after the colloid is solidified, and then the pressure relief channel 23 is plugged by using the threaded sealing bolt, so that the plugging operation of the through hole on the conveying pipeline 1 is completed.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a pipeline leaking stoppage ware is not released to layering progressive formula, includes pipeline (1), seals mechanism (2) and seals mechanism (3) down, the upper and lower both ends of through-hole department are equipped with respectively on pipeline (1) surface seals mechanism (2) and seals mechanism (3) down, seal mechanism (2) and seal down through hex bolts fixed connection, its characterized in that on with down between mechanism (3):
the upper sealing mechanism (2) comprises an upper sealing plate (21), sealing glue screw channels I (22) are fixedly mounted on the left side and the right side of an inner cavity of the upper sealing plate (21), a pressure relief channel (23) is arranged in the middle of the inner cavity of the upper sealing plate (21) and between two groups of upper sealing plates (21), glue relief through holes (24) are formed in the middle of the inner cavity of the upper sealing plate (21) and on two sides of the pressure relief channel (23), a connecting return groove I (25) is formed in the front of the upper sealing plate (21) and on the periphery of the sealing glue screw channels I (22), and glue injection through holes (26) are formed in the left end and the right end of the upper sealing plate (21);
the lower sealing mechanism (3) comprises a lower sealing plate (31), the left side and the right side of the inner cavity of the lower sealing plate (31) are fixedly provided with a sealing glue screw channel II (32), and the front surface of the lower sealing plate (31) is provided with a connecting return groove II (33) at the periphery of the sealing glue screw channel II (32).
2. The layered progressive non-pressure-relief pipeline leak stopper as claimed in claim 1, wherein: the inner diameter of the sealing glue screw channel I (22) is equal to the outer diameter of the conveying pipeline (1), the spiral directions of the two groups of sealing glue screw channels I (22) or the two groups of sealing glue screw channels II (32) are opposite, and the spiral tracks between the corresponding sealing glue screw channels I (22) and the sealing glue screw channels II (32) are the same.
3. The layered progressive non-pressure-relief pipeline leak stopper as claimed in claim 1, wherein: the both sides of pressure release passageway (23) bottom all are equipped with the through-going formula of type of dogbone and lead to the inner chamber that groove and last pressure board (21) are linked together, and the internal diameter of pressure release passageway (23) is less than pipeline (1) external diameter 1 ~ 2 millimeters, is equipped with the thread sealing bolt simultaneously at the top of pressure release passageway (23).
4. The layered progressive non-pressure-relief pipeline leak stopper as claimed in claim 1, wherein: the inner walls of the two ends of the upper sealing plate (21) and the lower sealing plate (31) are respectively provided with elastic sealant in a spraying mode, and the inner diameter of the elastic sealant is smaller than the outer diameter of the conveying pipeline (1) by 1-3 mm.
5. The layered progressive non-pressure-relief pipeline leak stopper as claimed in claim 1, wherein: the inner diameter of the glue injection through hole (26) is three times that of the glue discharge through hole (24), and a sealing plug matched with the glue injection through hole (26) is arranged in the glue injection through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034537.5A CN111237582A (en) | 2020-01-14 | 2020-01-14 | Layered progressive type non-pressure-relief pipeline leakage stopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034537.5A CN111237582A (en) | 2020-01-14 | 2020-01-14 | Layered progressive type non-pressure-relief pipeline leakage stopper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111237582A true CN111237582A (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010034537.5A Pending CN111237582A (en) | 2020-01-14 | 2020-01-14 | Layered progressive type non-pressure-relief pipeline leakage stopper |
Country Status (1)
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| CN (1) | CN111237582A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762272A (en) * | 2020-12-17 | 2021-05-07 | 武汉固皇科技有限公司 | Novel waterproof leaking stoppage process |
| CN113566049A (en) * | 2021-07-15 | 2021-10-29 | 上海瑞契工程技术有限公司 | Resealing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4240650A (en) * | 1978-05-26 | 1980-12-23 | Adams Harold R | Leaking weld repair clamp |
| CN202561368U (en) * | 2012-05-21 | 2012-11-28 | 朱志祥 | Flange anti-plugging fixture |
| GB2505528A (en) * | 2012-08-30 | 2014-03-05 | David Beech | Enclosure for pipes, cables and wires |
| CN105423061A (en) * | 2015-12-08 | 2016-03-23 | 中国石油天然气集团公司 | Maintaining and first-aid repairing pipe clamp for sealing middle-high-pressure pipeline through light inner-expansion |
| CN205976532U (en) * | 2016-08-24 | 2017-02-22 | 中国航天建设集团有限公司 | Sleeve grout connection structure and wall body |
-
2020
- 2020-01-14 CN CN202010034537.5A patent/CN111237582A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4240650A (en) * | 1978-05-26 | 1980-12-23 | Adams Harold R | Leaking weld repair clamp |
| CN202561368U (en) * | 2012-05-21 | 2012-11-28 | 朱志祥 | Flange anti-plugging fixture |
| GB2505528A (en) * | 2012-08-30 | 2014-03-05 | David Beech | Enclosure for pipes, cables and wires |
| CN105423061A (en) * | 2015-12-08 | 2016-03-23 | 中国石油天然气集团公司 | Maintaining and first-aid repairing pipe clamp for sealing middle-high-pressure pipeline through light inner-expansion |
| CN205976532U (en) * | 2016-08-24 | 2017-02-22 | 中国航天建设集团有限公司 | Sleeve grout connection structure and wall body |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762272A (en) * | 2020-12-17 | 2021-05-07 | 武汉固皇科技有限公司 | Novel waterproof leaking stoppage process |
| CN112762272B (en) * | 2020-12-17 | 2022-09-16 | 武汉固皇科技有限公司 | Novel waterproof leaking stoppage process |
| CN113566049A (en) * | 2021-07-15 | 2021-10-29 | 上海瑞契工程技术有限公司 | Resealing device |
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Application publication date: 20200605 |