CN113623480A - Water seepage prevention and corrosion prevention device at joint of underground pipe network and construction method - Google Patents
Water seepage prevention and corrosion prevention device at joint of underground pipe network and construction method Download PDFInfo
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- CN113623480A CN113623480A CN202111074438.0A CN202111074438A CN113623480A CN 113623480 A CN113623480 A CN 113623480A CN 202111074438 A CN202111074438 A CN 202111074438A CN 113623480 A CN113623480 A CN 113623480A
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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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- 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
- F16L55/02—Energy absorbers; Noise absorbers
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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
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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
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
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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 field of repairing of underground pipe network butt joints, in particular to a water seepage prevention and corrosion prevention device and a construction method for the underground pipe network butt joint, aiming at solving the problems that the existing underground pipe network butt joint repairing technology is short in time efficiency and needs to face annual repeated repairing, the scheme comprises a water pipe, a wall penetrating pipe, an outer sleeve, a water blocking layer, a flexible water blocking layer, a pipeline radial movement compensation ring and a wall sealing layer; the wall pipe sets up the outside at the water pipe, the tip that the shutoff is regional is treated to the wall pipe to the outer tube sleeve cover, the water blocking layer, flexible water blocking layer, pipeline radial drunkenness compensating ring and wall sealing layer set gradually in the outside of water pipe from inside to outside along the axial direction, and the water blocking layer, flexible water blocking layer, pipeline radial drunkenness compensating ring and wall sealing layer all set up between water pipe and wall pipe or between water pipe and outer tube, make the water blocking layer piece fine with wait to restore the laminating of wall pipe inner wall, the practicality of damaging the pipeline has been improved greatly, the whole size of the device is less, moreover, the steam generator is simple in structure, and the manufacturing cost is low.
Description
Technical Field
The invention relates to the field of repairing of underground pipe network butt joints, in particular to a water seepage prevention and corrosion prevention device and a construction method for the underground pipe network butt joint.
Background
Along with the acceleration of the urbanization process in China, the urban construction strength is obviously increased, underground pipelines are easily damaged in the construction process, and meanwhile, the pipelines are repaired or transformed all the time, and the repair of various pipelines is also involved. The length of the pipeline repairing time seriously affects the daily work and life of people, particularly the repairing of a large-diameter main pipe and a branch pipe, the road surface needs to be excavated, the repair is not needed day and night, the repairing technology is short in time-efficiency, and the repairing technology needs to be repeatedly repaired every year, so that the repairing technology needs to be more, faster, better and more economical.
Disclosure of Invention
The invention discloses the following purposes: the invention provides a water seepage prevention and corrosion prevention device and a construction method for an underground pipe network butt joint, aiming at solving the problems that the existing underground pipe network butt joint repairing technology is short in time-efficiency and needs to face annual repeated repairing.
The purpose of the invention is realized as follows: the anti-seepage and anti-corrosion device for the joint of the underground pipe network comprises a water pipe, a wall penetrating pipe, an outer sleeve, a water-resistant layer, a flexible water-resistant layer, a pipeline radial movement compensation ring and a wall sealing layer;
the wall penetrating pipe is arranged outside the water pipe, the outer sleeve is sleeved at the end part of the wall penetrating pipe to be plugged, the water blocking layer, the flexible water blocking layer, the pipeline radial movement compensation ring and the wall sealing layer are sequentially arranged outside the water pipe from inside to outside along the axial direction, and the water blocking layer, the flexible water blocking layer, the pipeline radial movement compensation ring and the wall sealing layer are all arranged between the water pipe and the wall penetrating pipe or between the water pipe and the outer sleeve.
Furthermore, the water-resistant layer and the flexible water-resistant layer are both arranged at the gap between the water pipe and the wall pipe; the pipeline radial movement compensation ring and the wall sealing layer are arranged at the gap between the water pipe and the outer sleeve.
And further, the water-resistant layer is a polypropylene ethylene water replenishing agent.
Further, the flexible waterproof layer is made of a flexible insulator.
And furthermore, a corrugated water blocking device is arranged between the flexible water blocking layer and the water pipe, and a water rust protective coating is arranged on the outer side wall of the water pipe.
Further, the pipeline radial float compensation ring is a U-shaped rubber ring.
And furthermore, the wall sealing layer is a water-blocking equal-height ring.
Further, the outer sleeve is a corrugated tube.
The construction method of the anti-seepage and anti-corrosion device at the joint of the underground pipe network pair specifically comprises the following steps:
the method comprises the following steps: injecting a water-resisting layer into the positions to be repaired of the water pipe and the wall-penetrating pipe;
step two: and filling a flexible water-blocking layer behind the water-blocking layer to enable the filled flexible water-blocking layer to be flush with the cross section of the through-wall pipe.
Step three: clamping a pipeline radial play compensation ring outside the water pipe, wherein the pipeline radial play compensation ring is arranged to be clung to the wall pipe;
step four: installing an outer sleeve outside the wall penetrating pipe; the outer sleeve is tightly wrapped on the wall-penetrating pipe and the pipeline radial movement compensation ring for installation, and a gap is reserved between the outer sleeve and the water pipe after installation;
step five: and a wall sealing layer is arranged at the position of a gap between the outer sleeve and the water pipe, and the wall sealing layer is flush with the outer sleeve after installation.
Furthermore, when the flexible water-blocking layer is filled behind the water-blocking layer in the second step, the water rust protective coating is coated outside the water pipe, and the corrugated water-blocking device is filled inside the flexible water-blocking layer.
Has the advantages that: in the use, at first, pour into the water blocking layer into at the position of waiting to mend, be suitable for the operation of taking water, it is accurate to mend, wherein fill flexible water blocking layer and play the effect of filling gap and support, play the effect of buffering when the water moves, it is the harm to restoreing the pipeline to reduce to clamp pipeline radial drunkenness compensating ring, at the wall pipe externally mounted overcoat pipe, make its extrusion closely laminate the outer wall at the pipeline of waiting to restore (wall pipe), wall pipe afterbody installation closing wall layer, guarantee that whole overcoat pipe is in complete filling state, avoid the inside outer stream of filling of outer tube and outside sharp-pointed object scraping.
The device has the advantages that the water blocking layer blocks are well attached to the inner wall of the pipeline (the wall penetrating pipe) to be repaired, the maintenance is convenient, the practicability of the damaged pipeline is greatly improved, the whole body of the device is small, the structure is simple, the manufacturing cost is low, and the use is convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an overall schematic view of the present invention.
Fig. 2 is an enlarged schematic view of part a of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
The first embodiment is as follows: the device for preventing water seepage and corrosion at the joint of the underground pipe network comprises a water pipe 1, a wall penetrating pipe 2, an outer sleeve 3, a water resisting layer 4, a flexible water resisting layer 5, a pipeline radial float compensation ring 6 and a wall sealing layer 7;
the wall penetrating pipe 2 is arranged outside the water pipe 1, the outer sleeve 3 is sleeved at the end part of the wall penetrating pipe 2 to be plugged, the water blocking layer 4, the flexible water blocking layer 5, the pipeline radial movement compensating ring 6 and the wall sealing layer 7 are sequentially arranged outside the water pipe 1 from inside to outside along the axial direction, and the water blocking layer 4, the flexible water blocking layer 5, the pipeline radial movement compensating ring 6 and the wall sealing layer 7 are all arranged between the water pipe 1 and the wall penetrating pipe 2 or between the water pipe 1 and the outer sleeve 3.
In the present embodiment: the method is characterized in that a water-blocking layer is injected into a position to be repaired, the method is suitable for operation with water, the repairing is accurate, the flexible water-blocking layer is filled to play a role in filling gaps and supporting, the function of buffering is played during water movement, the damage of a clamped pipeline radial movement compensation ring to a repaired pipeline is reduced, an outer sleeve is externally installed outside a wall penetrating pipe, the outer sleeve is extruded and tightly attached to the outer wall of the pipeline to be repaired (the wall penetrating pipe), a wall sealing layer is installed at the tail part of the wall penetrating pipe, the whole outer sleeve is ensured to be in a complete filling state, and the outer sleeve is prevented from being filled with outside water and being scraped by external sharp objects.
The second embodiment is as follows: the device is characterized by comprising a water seepage prevention and corrosion prevention device at the joint of an underground pipe network pair, wherein the water resistance layer 4 and the flexible water resistance layer 5 are both arranged at the gap between the water pipe 1 and the wall penetrating pipe 2; the pipeline radial float compensation ring 6 and the wall sealing layer 7 are arranged at the gap between the water pipe 1 and the outer sleeve.
In the present embodiment: the water-resistant layer 4 and the flexible water-resistant layer 5 are arranged at the gap between the water pipe 1 and the wall-penetrating pipe 2 to complete the plugging of the wall-penetrating pipe, and the pipeline radial movement compensation ring 6 and the wall sealing layer 7 are arranged at the gap between the water pipe 1 and the outer sleeve 3. And finishing the strengthening of the plugging.
The other embodiments are the same as the first embodiment.
In the third concrete implementation mode, the underground pipe network is a water seepage prevention and corrosion prevention device at the joint, and the water resisting layer 4 is a polypropylene ethylene water replenishing agent.
In the present embodiment: the polypropylene ethylene water replenishing agent has good glue sealing effect.
The other embodiments are the same as the first embodiment.
The fourth concrete implementation mode: the device for preventing water seepage and corrosion at the joint of the underground pipe network pair, wherein the flexible water-resistant layer 5 is made of a flexible insulator.
In the present embodiment: the flexible insulator can eliminate or weaken water vibration to which the waterproof layer is subjected.
The other embodiments are the same as the first embodiment.
The fifth concrete implementation mode: a ripple water-blocking device 8 is arranged between the flexible water-blocking layer 5 and the water pipe 1, and a scale protective coating 9 is arranged on the outer side wall of the water pipe 1.
In the present embodiment: the scale protective coating prevents the pipeline from being stained with water and rusted, improves the plugging effect and prolongs the service life of the plugged pipeline.
In the present embodiment: the inner wall of the outer sleeve is brushed with a scale protective coating 9, and a sealing layer is arranged between the scale protective coating and the outer sleeve.
The other embodiments are the same as the fourth embodiment.
The sixth specific implementation mode: the pipe joint is a water seepage prevention and corrosion prevention device, and the pipeline radial float compensation ring 6 is a U-shaped rubber ring.
In the present embodiment: the U-shaped rubber ring is simple to operate, and has good sealing and anti-moving effects after installation.
The other embodiments are the same as the first embodiment.
The seventh embodiment: the underground pipe network is a water-blocking and corrosion-proof device at the joint, and the wall sealing layer 7 is a water-blocking equal-height ring.
The other embodiments are the same as the first embodiment.
In the present embodiment: after the water-blocking contour ring is arranged, the blocking effect of the pipeline is improved on one hand, and on the other hand, the blocking material in front of the pipeline is protected, so that the damage of the material in front is avoided.
The specific implementation mode is eight: the anti-seepage and anti-corrosion device is arranged at the joint of the underground pipe network, and the outer sleeve 3 is a corrugated pipe.
In the present embodiment: the corrugated pipe can compensate vibration, and the plugging effect and the plugging service life are improved.
The other embodiments are the same as the first embodiment.
The specific implementation method nine: the construction method of the anti-seepage and anti-corrosion device at the joint of the underground pipe network pair specifically comprises the following steps:
the method comprises the following steps: injecting a water-resisting layer 4 into the positions to be repaired of the water pipe 1 and the through-wall pipe 2;
step two: and filling a flexible water-resistant layer 5 behind the water-resistant layer 4 to enable the filled flexible water-resistant layer 5 to be flush with the section of the through-wall pipe 2.
Step three: a pipeline radial play compensation ring 6 is clamped outside the water pipe 1, and the pipeline radial play compensation ring 6 is arranged to be close to the wall penetrating pipe 2;
step four: the outer sleeve 3 is arranged outside the wall penetrating pipe 2; the outer sleeve 3 is tightly wrapped on the wall-penetrating pipe 2 and the pipeline radial movement compensation ring 6 for installation, and after installation, a gap is reserved between the outer sleeve 3 and the water pipe 3;
step five: and a wall sealing layer 7 is arranged at the position of a gap between the outer sleeve 3 and the water pipe 3, and the wall sealing layer 7 is flush with the outer sleeve 3 after installation.
The detailed implementation mode is ten: and in the second step, when the flexible water-blocking layer 5 is filled behind the water-blocking layer 4, firstly coating a scale protective coating on the outside of the water pipe 3, and firstly filling the corrugated water-blocking device 8 in the flexible water-blocking layer 5.
The other embodiments are the same as the ninth embodiment.
The working principle is as follows: in the use, at first, pour into the water blocking layer into at the position of waiting to mend, be suitable for the operation of taking water, it is accurate to mend, wherein fill flexible water blocking layer and play the effect of filling gap and support, play the effect of buffering when the water moves, it is the harm to restoreing the pipeline to reduce to clamp pipeline radial drunkenness compensating ring, at the wall pipe externally mounted overcoat pipe, make its extrusion closely laminate the outer wall at the pipeline of waiting to restore (wall pipe), wall pipe afterbody installation closing wall layer, guarantee that whole overcoat pipe is in complete filling state, avoid the inside outer stream of filling of outer tube and outside sharp-pointed object scraping.
The device has the advantages that the water blocking layer blocks are well attached to the inner wall of the pipeline (the wall penetrating pipe) to be repaired, the maintenance is convenient, the practicability of the damaged pipeline is greatly improved, the whole body of the device is small, the structure is simple, the manufacturing cost is low, and the use is convenient.
Other embodiments are the same as the ninth embodiment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a prevention of seepage water, anticorrosive device of underground pipe network to kneck which characterized in that: the device comprises a water pipe (1), a wall penetrating pipe (2), an outer sleeve (3), a water-resistant layer (4), a flexible water-resistant layer (5), a pipeline radial movement compensation ring (6) and a wall sealing layer (7);
the wall penetrating pipe (2) is arranged outside the water pipe (1), the end part of the wall penetrating pipe (2) to be plugged is sleeved with the outer sleeve (3), the water blocking layer (4), the flexible water blocking layer (5), the pipeline radial movement compensation ring (6) and the wall sealing layer (7) are sequentially arranged outside the water pipe (1) from inside to outside along the axial direction, and the water blocking layer (4), the flexible water blocking layer (5), the pipeline radial movement compensation ring (6) and the wall sealing layer (7) are all arranged between the water pipe (1) and the wall penetrating pipe (2) or between the water pipe (1) and the outer sleeve (3).
2. The apparatus of claim 1 for preventing water seepage and corrosion at a pipe network interface, comprising: the waterproof layer (4) and the flexible waterproof layer (5) are both arranged at the gap between the water pipe (1) and the wall penetrating pipe (2); the pipeline radial movement compensation ring (6) and the wall sealing layer (7) are arranged at the gap between the water pipe (1) and the outer sleeve (3).
3. The apparatus of claim 1 for preventing water seepage and corrosion at a pipe network interface, comprising: the water-resistant layer (4) is a polypropylene ethylene water replenishing agent.
4. The apparatus of claim 1 for preventing water seepage and corrosion at a pipe network interface, comprising: the flexible waterproof layer (5) is made of a flexible insulator.
5. The apparatus for preventing water seepage and corrosion at an underground piping network interface according to claim 4, wherein: a ripple water-blocking device (8) is arranged between the flexible water-blocking layer (5) and the water pipe (1), and a rust protective coating (9) is arranged on the outer side wall of the water pipe (1).
6. The apparatus of claim 1 for preventing water seepage and corrosion at a pipe network interface, comprising: the pipeline radial movement compensation ring (6) is a U-shaped rubber ring.
7. The apparatus of claim 1 for preventing water seepage and corrosion at a pipe network interface, comprising: the wall sealing layer (7) is a water-blocking equal-height ring.
8. The apparatus of claim 1 for preventing water seepage and corrosion at a pipe network interface, comprising: the outer sleeve (3) is a corrugated pipe.
9. The construction method of the anti-seepage and anti-corrosion device at the joint of the underground pipe network pair is characterized by comprising the following steps of: the construction of the water seepage prevention and corrosion prevention device at the interface by using the underground pipe network according to any one of claims 1 to 8 comprises the following steps:
the method comprises the following steps: injecting a water resisting layer (4) at the positions to be repaired of the water pipe (1) and the through-wall pipe (2);
step two: and filling a flexible water-resistant layer (5) behind the water-resistant layer (4) to enable the filled flexible water-resistant layer (5) to be flush with the cross section of the wall penetrating pipe (2).
Step three: a pipeline radial play compensation ring (6) is clamped outside the water pipe (1), and the pipeline radial play compensation ring (6) is arranged to be close to the wall penetrating pipe (2);
step four: an outer sleeve (3) is arranged outside the wall penetrating pipe (2); the outer sleeve (3) is tightly wrapped on the wall-penetrating pipe (2) and the pipeline radial movement compensation ring (6) for installation, and a gap is reserved between the outer sleeve (3) and the water pipe (3) after installation;
step five: a wall sealing layer (7) is arranged at a position where a gap is reserved between the outer sleeve (3) and the water pipe (3), and the wall sealing layer (7) is flush with the outer sleeve (3) after installation.
10. The method of constructing a water seepage prevention and corrosion prevention apparatus at an underground utility grid-to-interface according to claim 9, wherein: and in the second step, when the flexible water-resisting layer (5) is filled behind the water-resisting layer (4), firstly, the water rust protective coating is coated outside the water pipe (3), and the corrugated water-resisting device (8) is filled inside the flexible water-resisting layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111074438.0A CN113623480A (en) | 2021-09-14 | 2021-09-14 | Water seepage prevention and corrosion prevention device at joint of underground pipe network and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111074438.0A CN113623480A (en) | 2021-09-14 | 2021-09-14 | Water seepage prevention and corrosion prevention device at joint of underground pipe network and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN113623480A true CN113623480A (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111074438.0A Withdrawn CN113623480A (en) | 2021-09-14 | 2021-09-14 | Water seepage prevention and corrosion prevention device at joint of underground pipe network and construction method |
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| CN (1) | CN113623480A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321362A (en) * | 2021-12-30 | 2022-04-12 | 哈尔滨锅炉厂有限责任公司 | Connecting structure with heat insulation function and connecting method |
-
2021
- 2021-09-14 CN CN202111074438.0A patent/CN113623480A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321362A (en) * | 2021-12-30 | 2022-04-12 | 哈尔滨锅炉厂有限责任公司 | Connecting structure with heat insulation function and connecting method |
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Application publication date: 20211109 |
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