CN113236870B - Valve well seepage-proofing construction process - Google Patents
Valve well seepage-proofing construction process Download PDFInfo
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- CN113236870B CN113236870B CN202110450322.6A CN202110450322A CN113236870B CN 113236870 B CN113236870 B CN 113236870B CN 202110450322 A CN202110450322 A CN 202110450322A CN 113236870 B CN113236870 B CN 113236870B
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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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/10—Sealing by using sealing rings or sleeves only
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Abstract
The invention relates to the technical field of valve wells, in particular to an anti-seepage construction process of a valve well, which comprises the following steps: cleaning a sleeve of the valve well and the surface of a pipeline, sleeving an insulating support on the outer wall of the pipeline, penetrating the pipeline and the insulating support into the sleeve from the direction of the outer wall of the valve well, and fixing the pipeline support in the center of the sleeve; filling a sealing assembly into a gap between the sleeve and the pipeline at one side of the insulating support, which is close to the outer wall of the valve well; covering a heat shrinkage layer on a sealing surface formed by connecting the outer wall of the sleeve, the sealing assembly and the pipeline; and sleeving a second sealing ring on the heat shrinkage layer, and fastening the second sealing ring by using a fastener. The valve well seepage-proofing construction process can realize the sealing and waterproofing between the sleeve and the pipeline, realize the corrosion resistance of the sleeve and the pipeline, is suitable for the seepage-proofing sealing of the in-service oil gas pipeline and the penetrating opening of the valve well, has obvious seepage-proofing effect and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of valve wells, in particular to an anti-seepage construction process for a valve well.
Background
The problem of seepage prevention of a pipeline valve well is a chronic disease which always puzzles oil supply engineering constructors of all airports at home and abroad since the application of an apron pipeline. The valve well of the air apron pipeline is used as an important component of the main oiling mode of the current large and medium-sized airports, and the oiling mode of the oiling plug well combined by the air apron pipeline network and the pipeline oiling truck has a significant role in the oil supply engineering. In recent years, the phenomenon of water seepage appears in the air apron pipeline valve well oil pipe and the steel sleeve, especially in the air apron pipeline valve well in the south area, because the groundwater level is higher, the phenomenon of reverse osmosis backflow of groundwater generally exists, the sealing between the valve well oil pipe and the sleeve is not tight, the seepage prevention measures are not in place, water seeping through a sealing gap between the oil pipe and the sleeve is often backlogged in the valve well, so that people are required to be specially dispatched to pump water, the labor cost is obviously increased, the corrosion rate of the valve and the connecting piece is further increased, and potential hidden danger is brought to production operation.
At present, people commonly realize that the valve well is impervious mainly through the mode of the Z-shaped sealing ring and the heat shrinkage sleeve of the external addition of a water stopping steel plate, and the valve well is characterized in that the steel sleeve on the inner side of the valve well is mechanically sealed with an oil pipe due to the adoption of the steel water stopping plate, when the oil pipe is frequently opened and closed due to the fact that a oiling bolt on an air apron pipeline, the flow rate of a pipeline node is changed greatly, the phenomenon of water hammer is frequent, the pipeline is frequently trembled, so that the water stopping steel plate scrapes and collides with the outer anti-corrosion layer of the oil pipe, the sealing effect between the oil pipe and the steel sleeve is reduced, and the outer anti-corrosion layer of the oil pipe is also damaged: meanwhile, in the past, between the oil pipe and the steel sleeve pipe at the outer side of the valve well, the Z-shaped sealing ring is influenced by the construction of the outer ring heat shrinkage sleeve, colloid softens and deforms under the baking of flame, the sealing effect is reduced, and even the sealing performance is lost due to the fact that the baking flame temperature is too high, and the overall sealing performance is greatly influenced.
Chinese patent CN202010729239.8 discloses a valve well and construction method thereof, and the valve well includes the well body that upper portion is the opening setting, first pipeline hole and second pipeline hole have been seted up respectively to the relative both sides wall of well body, and the water of stratum is permeated into the well body by first pipeline hole or second pipeline hole, installs shock mount mechanism in well body lower extreme, and though this scheme can improve the shock resistance of well body, but first pipeline hole and second pipeline hole are sealed not tightly, permeate moisture easily, cause the corruption to well body and pipeline.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a valve well seepage-proofing construction process which seals a gap between a valve well sleeve and an oil pipe and realizes the waterproof and corrosion-proofing of the sleeve and the oil pipe.
In order to solve the technical problems, the invention adopts the following technical scheme:
the anti-seepage construction process of the valve well comprises the following steps:
s1: cleaning a sleeve of the valve well and the surface of a pipeline, sleeving an insulating support on the outer wall of the pipeline, penetrating the pipeline and the insulating support into the sleeve from the direction of the outer wall of the valve well, and fixing the pipeline support in the center of the sleeve;
s2: after step S1, filling a sealing assembly into a gap between the sleeve and the pipe on a side of the insulating support close to the outer wall of the valve well;
s3: after the step S2, covering a heat shrinkage layer on a sealing surface formed by the outer wall of the sleeve, the sealing assembly and the pipeline connection;
s4: in the step S3, a second sealing ring is sleeved on the heat shrinkage layer, and the second sealing ring is fastened by a fastener.
According to the valve well seepage-proofing construction process, the insulating support is sleeved on the pipeline, the insulating support penetrates into the sleeve from the outer wall direction of the valve well together with the pipeline, the pipeline is fixed and supported in the center of the sleeve by the insulating support, a gap between the sleeve and the pipeline is filled by the sealing assembly so as to realize sealing and waterproofing between the sleeve and the pipeline, the heat shrinkage layer is arranged on the sealing surfaces of the sleeve, the sealing assembly and the pipeline connecting surface after baking and softening, so that the sleeve and the pipeline are prevented from being corroded, the second sealing ring is used for sealing, and the second sealing ring is fastened by the fastening piece. The valve well seepage-proofing construction process can realize the sealing and waterproofing between the sleeve and the pipeline, realize the corrosion resistance of the sleeve and the pipeline, is suitable for the seepage-proofing sealing of the in-service oil gas pipeline and the penetrating opening of the valve well, has obvious seepage-proofing effect and has wide application prospect.
Preferably, in step S1, when cleaning the sleeve, the outer wall of the sleeve is subjected to spray rust removal treatment by using a sand blasting rust removal device, the spray rust removal is required to reach the Sa21/2 level, the depth/roughness of the surface anchor lines is 40 μm-90 μm, and after the rust removal is completed, the tool is used for removing surface dust, and the surface dust degree reaches the 3 level and above.
Preferably, in step S1, when the pipeline is cleaned, an anti-corrosion layer is provided on the surface of the pipeline, and roughening treatment is performed on the surface of the anti-corrosion layer on the surface of the pipeline.
Preferably, after step S1, a first sealing ring is installed in a gap between the sleeve and the pipe on a side of the insulating support close to the inner wall of the valve well, and fastening is performed by using a sleeve.
Preferably, the outer side of the first sealing ring is flush with one side of the sleeve close to the inner wall of the valve well, and a gap is reserved between the first sealing ring and the insulating support.
Preferably, in step S2, the sealing assembly includes a first sealing layer and a second sealing layer, the first sealing layer is first filled into a gap between the sleeve and the pipe, and compacted tightly against the insulating support, and then the second sealing layer is filled into a gap between the sleeve and the pipe, and tightly against the first sealing layer.
Preferably, the first sealing layer is an asphalt-oil-hemp layer, the second sealing layer is an expansion cement layer, the asphalt-oil-hemp filaments are soaked in asphalt for a long time, the asphalt-oil-hemp filaments are tightly screwed and wound after being fully absorbed, the asphalt-oil-hemp is tightly compacted by filling asphalt-oil-hemp into a gap between a sleeve and a pipeline on one side of an insulating support, which is close to the outer wall of a valve well, the operation is repeated to form the asphalt-oil-hemp layer, and then cement powder and water are stirred according to a water-cement ratio of 0.57 and then are filled into the gap between the sleeve and the pipeline to form the expansion cement layer.
Preferably, in step S3, an epoxy primer with a thickness not less than 150 μm is applied to the sealing surface, and then the heat shrinkage layer is covered on the surface of the epoxy primer.
Preferably, in step S3, the heat shrinkage layer is a heat shrinkage sleeve or a heat winding belt, the heat shrinkage sleeve is heated and softened by flame or other heat sources, so that the heat shrinkage sleeve is tightly adhered to the sealing surface, the heat shrinkage sleeve is compacted by a tool, redundant air between the heat shrinkage sleeve and the sealing surface is extruded, or the heat winding belt is layered, baked and softened and wound on the sealing surface, the upper layer is tightly pressed down during winding, the upper layer covers 1/2 of the lower layer for winding, the heat winding belt is compacted by the tool, and redundant air between the heat winding belt and the sealing surface is extruded.
Preferably, in step S4, the second sealing ring is a Z-shaped sealing ring, and the slope of the end surface formed at the end of the second sealing layer is 30 ° to 45 ° so as to be attached to the Z-shaped sealing ring.
Compared with the background technology, the valve well seepage-proofing construction technology has the following beneficial effects:
the valve well seepage-proofing construction process can realize the sealing and waterproofing between the sleeve and the pipeline, realize the corrosion resistance of the sleeve and the pipeline, is suitable for the seepage-proofing sealing of the in-service oil-gas pipeline valve well penetrating port, has obvious seepage-proofing effect and has wide application prospect.
Drawings
FIG. 1 is a schematic diagram of a valve well after the completion of the seepage control construction according to an embodiment of the present invention;
in the accompanying drawings: 1-a valve well; 11-valve well inner wall; 12-valve well outer wall; 2-piping; 3-sleeve; 4-insulating support; a 5-seal assembly; 51-a first sealing layer; 52-a second sealing layer; 6-heat shrinkage layer; 61-epoxy primer; 7-a second sealing ring; 8-a first sealing ring; 9-water stop ring.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
The seepage-proofing construction process of the valve well comprises the following steps of:
s1: cleaning the surface of the pipeline 2 and the sleeve 3 of the valve well 1, sleeving the insulating support 4 on the outer wall of the pipeline 2, penetrating the pipeline 2 and the insulating support 4 into the sleeve 3 from the direction of the outer wall 12 of the valve well, and fixing the pipeline 2 to the center of the sleeve 3;
s2: after step S1, filling a sealing assembly 5 into a gap between the sleeve 3 and the pipe 2 at a side of the insulating support 4 close to the valve well outer wall 12;
s3: after the step S2, covering a heat shrinkage layer 6 on a sealing surface formed by connecting the outer wall of the sleeve 3, the sealing assembly 5 and the pipeline 2;
s4: in step S3, the heat shrinkage layer 6 is sleeved with a second sealing ring 7, and the second sealing ring 7 is fastened by a fastener.
According to the valve well seepage-proofing construction process, as shown in fig. 1, the insulating support 4 is sleeved on the pipeline 2, penetrates into the sleeve 3 from the direction of the outer wall 12 of the valve well together with the pipeline 2, the insulating support 4 fixes and supports the pipeline 2 at the center of the sleeve 3, the sealing assembly 5 fills gaps between the sleeve 3 and the pipeline 2 so as to realize sealing and waterproofing between the sleeve 3 and the pipeline 2, the heat shrinkage layer 6 is arranged on the sealing surfaces of the sleeve 3, the sealing assembly 5 and the connecting surface of the pipeline 2 after baking and softening, corrosion resistance of the sleeve 3 and the pipeline 2 is realized, the second sealing ring 7 is sealed through the second sealing ring 7, and the second sealing ring 7 is fastened through a fastener. The valve well seepage-proofing construction process can realize the sealing and waterproofing between the sleeve 3 and the pipeline 2, realize the corrosion prevention of the sleeve 3 and the pipeline 2, is suitable for the seepage-proofing sealing of the in-service oil gas pipeline 2 and the penetrating opening of the valve well 1, has obvious seepage-proofing effect and has wide application prospect.
In the step S1, the insulating support 4 is respectively in close contact with the outer wall of the pipeline 2 and the inner wall of the sleeve 3, as shown in FIG. 1, so that the pipeline 2 can be fastened in the center of the sleeve 3; the insulating support 4 is provided with a number of support legs, the number of support legs being greater than 40, so that the insulating support 4 can support a pipe.
In step S1, when the sleeve 3 is cleaned, the outer wall of the sleeve 3 is subjected to spray rust removal treatment by using sand blasting rust removal equipment, the spray rust removal is required to reach Sa21/2 level, the depth/roughness of the surface anchor lines is 40-90 mu m, and after the rust removal is finished, a tool is used for removing surface dust, and the surface dust degree reaches 3 level and above.
In step S1, when the pipe 2 is cleaned, an anti-corrosion layer is disposed on the surface of the pipe 2, and roughening treatment is performed on the surface of the anti-corrosion layer on the surface of the pipe 2, so as to meet that the heat shrinkage layer 6 can be covered on the anti-corrosion layer on the surface of the pipe 2 in the subsequent step.
After step S1, a first sealing ring 8 is mounted in the gap between the sleeve 3 and the pipe 2 on the side of the insulating support 4 close to the valve well inner wall 11, and is tightened by tightening with a sleeve.
The outside of the first sealing ring 8 is flush with one side of the sleeve 3, which is close to the inner wall 11 of the valve well, a gap is reserved between the inside of the first sealing ring 8 and the insulating support 4, and the insulating support 4 and the first sealing ring 8 are prevented from collision due to the water hammer phenomenon occurring during operation of the pipeline 2.
The first sealing ring 8 is a chain sealing ring and is fastened and tightened through a sleeve.
In step S2, the sealing assembly 5 includes a first sealing layer 51 and a second sealing layer 52, the first sealing layer 51 is filled into the gap between the sleeve 3 and the pipe 2, and is compacted to be close to the insulating support 4, and then the second sealing layer 52 is filled into the gap between the sleeve 3 and the pipe 2, and is close to the first sealing layer 51.
The first sealing layer 51 is an asphalt-oil-hemp layer, the second sealing layer 52 is an expansion cement layer, oil-hemp filaments are soaked in asphalt for a long time, asphalt is fully absorbed, then the asphalt-oil-hemp is tightly wound and woven, one side of the insulating support 4, which is close to the outer wall 12 of the valve well, is filled with the asphalt-oil-hemp for compaction, the gap between the sleeve 3 and the pipeline 2 is filled with the asphalt-oil-hemp for compaction, the operation is repeated, the asphalt-oil-hemp layer is formed, and cement powder and water are stirred according to a water-cement ratio of 0.57 and then are filled into the gap between the sleeve 3 and the pipeline 2, so that the expansion cement layer is formed. Because of the extensibility of the oil hemp yarn, redundant gap spaces can be filled when the oil hemp yarn is extended, so that a good sealing effect is achieved, and the seepage-proofing performance is excellent; the expansion cement layer has compact structural characteristics, the asphalt-oil-hemp layer is fixedly plugged, and after being solidified, the expansion cement layer expands and can be firmly tightly attached to each contact surface, so that a good fixed plugging effect is achieved, and at the moment, the sealing surface is the connecting surface of the outer wall surface of the sleeve 3, the surface of the expansion cement layer and the outer wall surface of the pipeline 2.
In step S3, the epoxy primer 61 with the thickness not smaller than 150 mu m is coated on the sealing surface, and then the heat shrinkage layer 6 is covered on the surface of the epoxy primer 61, so that the inner wall of the heat shrinkage layer 6 is better combined with the sealing surface after the heat shrinkage layer 6 is baked and softened.
In step S3, the heat shrinkage layer 6 is a heat shrinkage sleeve or a heat winding belt, flame or other heat sources are adopted to heat and soften the heat shrinkage sleeve, so that the heat shrinkage sleeve is tightly adhered to a cover, the heat shrinkage sleeve is compacted by a tool, redundant air between the heat shrinkage sleeve and a sealing surface is extruded, and the heat shrinkage sleeve, the sleeve 3 and an anti-corrosion layer of the pipeline 2 form an anti-corrosion body; or the hot winding belt is layered, baked and softened and then wound on the sealing surface, the upper layer is tightly pressed down during winding, the upper layer covers 1/2 of the lower layer for winding, the hot winding belt is compacted by a tool, redundant air between the hot winding belt and the sealing surface is extruded, and the hot winding belt, the sleeve 3 and the anti-corrosion layer of the pipeline 2 form an anti-corrosion body.
In step S4, the second sealing ring 7 is a Z-shaped sealing ring, and the slope of the end surface formed at the end of the second sealing layer 52 is 30 ° to 45 ° so as to be attached to the Z-shaped sealing ring, thereby improving the sealing reliability.
In step S4, the fastener is a metal chain, specifically, after the heat shrinkage layer 6 is cooled, the second sealing ring 7 is used for sealing, and the metal chain fastens the second sealing ring 7.
In the above embodiment, the outer wall of the sleeve 3 is fixedly connected with the water stop ring 9, the water stop ring 9 and the sleeve 3 form a whole, the water seepage phenomenon is prevented from occurring due to the fact that the joint surface between the sleeve 3 and the valve well 1 is not tightly sealed, and it is noted that the water stop ring 9 can be welded on the sleeve 3 or can be fixed on the sleeve 3 through a connecting piece.
In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. The seepage-proofing construction process of the valve well is characterized by comprising the following steps of:
s1: cleaning a sleeve (3) of the surface of the pipeline (2) and the valve well (1), sleeving an insulating support (4) on the outer wall of the pipeline (2), penetrating the pipeline (2) and the insulating support (4) into the sleeve (3) from the direction of the outer wall (12) of the valve well, and fixing the pipeline (2) to the center of the sleeve (3);
s2: filling a sealing assembly (5) into a gap between the sleeve (3) and the pipeline (2) at one side of the insulating support (4) close to the outer wall (12) of the valve well after the step S1; the sealing assembly (5) comprises a first sealing layer (51) and a second sealing layer (52), wherein the first sealing layer (51) is filled into a gap between the sleeve (3) and the pipeline (2) and is compacted and tightly attached to the insulating support (4), and then the second sealing layer (52) is filled into a gap between the sleeve (3) and the pipeline (2) and is tightly attached to the first sealing layer (51); a first sealing ring (8) is arranged at a gap between the sleeve (3) and the pipeline (2) on one side of the insulating support (4) close to the inner wall (11) of the valve well, and is fastened and tightened by using a sleeve;
s3: after the step S2, covering a heat shrinkage layer (6) on a sealing surface formed by connecting the outer wall of the sleeve (3), the sealing assembly (5) and the pipeline (2);
s4: in the step S3, a second sealing ring (7) is sleeved on the heat shrinkage layer (6), and the second sealing ring (7) is fastened by a fastener.
2. The valve well seepage-proofing construction process according to claim 1, wherein in step S1, when the sleeve (3) is cleaned, the outer wall of the sleeve (3) is subjected to spray rust removal treatment by using sand blasting rust removal equipment, the spray rust removal is carried out to reach Sa21/2 level, the depth/roughness of the surface anchor lines is 40 μm-90 μm, and after the rust removal is finished, the tool is used for removing surface dust, and the surface dust degree reaches 3 level and above.
3. The valve well seepage-proofing construction process according to claim 2, wherein in the step S1, when the pipeline (2) is cleaned, an anticorrosive layer is arranged on the surface of the pipeline (2), and roughening treatment is carried out on the surface of the anticorrosive layer on the surface of the pipeline (2).
4. The valve well seepage-proofing construction process according to claim 1, wherein the outer side of the first sealing ring (8) is flush with one side of the sleeve (3) close to the inner wall (11) of the valve well, and a gap is reserved between the first sealing ring (8) and the insulating support (4).
5. The valve well seepage-proofing construction process according to claim 1, wherein the first sealing layer (51) is an asphalt-oil-hemp layer, the second sealing layer (52) is an expansion cement layer, the asphalt-oil-hemp filaments are soaked in asphalt for a long time, the asphalt-oil-hemp is fully absorbed, then screwed and wound to be woven into asphalt-oil-hemp, one side of the insulating support (4) close to the outer wall (12) of the valve well is filled with the asphalt-oil-hemp in a gap between the sleeve (3) and the pipeline (2) for compaction, the operations are repeated to form the asphalt-oil-hemp layer, and cement powder and water are stirred according to a water-cement ratio of 0.57 and then are filled into the gap between the sleeve (3) and the pipeline (2) to form the expansion cement layer.
6. The valve well seepage-proofing construction process according to claim 5, wherein in step S3, an epoxy primer (61) with a thickness of not less than 150 μm is applied on the sealing surface, and then the heat shrinkage layer (6) is covered on the surface of the epoxy primer (61).
7. The valve well seepage-proofing construction process according to claim 1, wherein in the step S3, the heat shrinkage layer (6) is a heat shrinkage sleeve or a heat winding belt, the heat shrinkage sleeve is heated and softened by flame or other heat sources, the heat shrinkage sleeve is tightly adhered to the sealing surface, the heat shrinkage sleeve is compacted by a tool, redundant air between the heat shrinkage sleeve and the sealing surface is extruded, or the heat winding belt is wound on the sealing surface after being baked and softened, the upper layer is tightly pressed down during winding, the upper layer is covered by 1/2 of the lower layer for winding, the heat winding belt is compacted by the tool, and redundant air between the heat winding belt and the sealing surface is extruded.
8. The process according to any one of claims 1 to 7, wherein in step S4, the second seal ring (7) is a Z-shaped seal ring, and the slope of the end face formed at the end of the second seal layer (52) is 30 ° to 45 ° so as to be attached to the Z-shaped seal ring.
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| JP3448282B2 (en) * | 2001-02-13 | 2003-09-22 | 技研工業有限会社 | How to fill the void at the pipe installation location |
| CN102878354A (en) * | 2012-10-10 | 2013-01-16 | 中国建筑第七工程局有限公司 | Method for producing flexible waterproof casing |
| CN104455755A (en) * | 2014-12-03 | 2015-03-25 | 浙江省火电建设公司 | Waterproof sealing device of underground thrust wall feed-through sleeve |
| CN204739329U (en) * | 2015-06-18 | 2015-11-04 | 徐永权 | A pipeline waterproof construction for concrete wall |
| CN207961758U (en) * | 2018-03-12 | 2018-10-12 | 山东国建工程集团有限公司 | Underground effective waterproof construction through walls |
| CN208778877U (en) * | 2018-06-26 | 2019-04-23 | 上海市机电设计研究院有限公司 | Non- preset water string device |
| CN208719592U (en) * | 2018-07-16 | 2019-04-09 | 中国能源建设集团山西省电力勘测设计院有限公司 | The proof mechanism of water of wall pipe in heating direct-burying pipeline well room |
| CN210739582U (en) * | 2019-09-23 | 2020-06-12 | 南京思科德水环境科技有限公司 | Embedded sleeve plugging system |
| CN111140698A (en) * | 2019-12-31 | 2020-05-12 | 北京凯盛建材工程有限公司 | Waterproof wall bushing structure with flexible dynamic seal assembly on neutral surface and construction method |
| CN212718431U (en) * | 2020-07-06 | 2021-03-16 | 王长坤 | Pipeline wall-penetrating waterproof sleeve |
| CN212718433U (en) * | 2020-08-17 | 2021-03-16 | 王超 | Underground engineering pipeline wall penetrating structure |
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