CN218969130U

CN218969130U - Lining material and lining structure for non-excavation repair of gas pipeline

Info

Publication number: CN218969130U
Application number: CN202222750000.6U
Authority: CN
Inventors: 潘忠文; 张中超; 胡钦峰; 谢纯
Original assignee: Chengdu Longzhiquan Science & Technology Co ltd
Current assignee: Chengdu Longzhiquan Science & Technology Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-05-05
Anticipated expiration: 2032-10-19

Abstract

The utility model belongs to the technical field of non-excavation repair of gas pipelines, and particularly relates to a lining material and a lining structure for non-excavation repair of gas pipelines. The lining structure comprises the lining material and further comprises a repairing resin layer, wherein the repairing resin layer is filled with repairing resin for coating the fiber hose. The lining material and the lining structure provided by the utility model can be combined with a non-excavation repair process to repair the gas pipeline, can save operation time, improve efficiency, reduce cost of manpower and material resources, and do not influence travel and life of surrounding residents.

Description

Lining material and lining structure for non-excavation repair of gas pipeline

Technical Field

The utility model belongs to the technical field of non-excavation repair of gas pipelines, and particularly relates to a lining material and a lining structure for non-excavation repair of gas pipelines.

Background

The gas pipe is subjected to the dual effects of the external environment and the internal gas during use, and in some cases, the problem that the gas pipe is defective and needs to be repaired may occur.

The gas pipeline repairing technology has long been applied, and common gas pipeline repairing technologies include a live fire welding reinforcing repairing technology, a pipeline replacement repairing technology, a mechanical clamp repairing technology and a composite material reinforcing repairing technology. The welding reinforcing repair technology of dynamic fire welding refers to welding at the defect part of a pipeline by adopting reinforcing materials and combining welding operation, but the welding operation is carried out under the condition of continuous gas conveying, so that safety problems such as fire accidents and the like are frequent. The pipeline replacement and repair technology is a technology for cutting and replacing a new pipeline at a defective part of the pipeline, and has the advantages of long time period, large workload, influence on gas transportation and the like in actual work although the pipeline replacement and repair technology has good effect. The mechanical fixture repairing technology is to cover the fixture outside the pipeline defect to realize the leakage blocking. Although convenient, the mechanical fixture repair technology is often used for repairing emergency gas pipelines, and has the defects of unsatisfactory corrosion resistance, weak reinforcement durability and the like. The composite material reinforcing and repairing technology is characterized in that a reinforcing layer is formed at the defect position of the pipeline through fibers and resin materials, but because fuel gas is extremely dangerous gas, the composite material reinforcing and repairing technology has certain requirements on comprehensive mechanical properties such as pressure resistance, compression resistance and tensile properties of the pipeline, and the composite material reinforcing and repairing technology also has potential safety hazards.

At present, as the gas pipeline has certain pressure, the requirement on the ring rigidity and the bursting pressure of the material is higher. The existing repair structure of the non-pressure pipeline does not have the specific requirement, so that the repair structure cannot be applied to the field of gas pressure pipelines. Meanwhile, there is no example in which the inversion lining method is applied to the gas pipeline restoration at home, and the application of the inversion lining method to the gas pipeline restoration is only at a theoretical level. In view of the above, the present utility model provides a lining material and a lining structure for trenchless repair of a gas pipeline, and a method for repairing a gas pipeline using the same.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provides a lining material and a lining structure for trenchless repairing of a gas pipeline.

The aim of the utility model is realized by the following technical scheme: the lining material for the non-excavation repair of the gas pipeline comprises a tubular inner membrane and a fiber hose, wherein the outer side of the inner membrane is fixedly sleeved with the fiber hose, or the outer side of the fiber hose is fixedly sleeved with the inner membrane.

Further, the inner film is a PE film or a TPU film;

the fiber hose is formed by seamlessly weaving aramid fiber or polyester fiber.

Further the thickness of the inner film is in the range of 0.8-1mm;

the thickness of the fiber hose ranges from 3 mm to 5mm.

Further, the weaving lines of the fiber hose are net-shaped.

Further, the weaving density of the fiber hose ranges from 4*4 to 8 x 8/cm ² 。

Further, the diameter of the braided wire of the fiber hose ranges from 1mm to 4mm.

Further, the fiber hose is made of aramid fiber or carbon fiber or terylene.

Further, the fixing mode is glue bonding or hot melt bonding.

The utility model also provides a lining structure for the non-excavation repair of the gas pipeline, which comprises the lining material for the non-excavation repair of the gas pipeline and further comprises a repair resin layer, wherein the repair resin layer is filled with repair resin for coating the fiber hose.

Further, the inner side surface of the repair resin layer is in contact with the inner film, and the outer side surface of the repair resin layer is in contact with the inner side wall of the gas pipeline.

Further, the thickness of the repair resin layer is in the range of 3-7mm.

Further, the inner diameter of the inner membrane ranges from 150 mm to 1200mm;

and/or the inner diameter of the fiber hose ranges from 150 mm to 1200mm;

and/or the repair resin layer has an inner diameter ranging from 150 to 1200mm.

The beneficial effects of the utility model are as follows: the utility model provides a lining material and a lining structure for non-excavation repair of a gas pipeline, which are used for non-excavation repair of the gas pipeline. When the lining structure is used, the inner membrane 1 in the lining material is ensured to be arranged on the outer side of the fiber hose 2 (if not, the lining material is turned over), then the lining material is vacuumized through the pressing platform, the repairing material is uniformly poured into the lining material, and the lining structure with the latent characteristic is obtained.

Drawings

FIG. 1 is a schematic cross-sectional view of a liner material of the present utility model;

it should be noted that the lining material of the present utility model is soft, and thus the lining material of the present utility model is drawn in a circular shape for convenience of drawing and viewing;

FIG. 2 is a schematic cross-sectional view of the lining material of the present utility model after filling with a repair material;

it should be noted that, after the lining material of the present utility model is filled with the repair material, the repair material is soft before solidification and hard after solidification, and the cross-sectional shape of the lining material of the present utility model after filling with the repair material is mainly determined based on the shape of the inner wall of the pipeline, and is almost regular round;

FIG. 3 is a schematic cross-sectional view of the lining material of the present utility model after filling with a repair material and used for pipeline repair.

In the figure, 1, an inner membrane; 2. a fiber hose; 3. repairing the resin layer; 4. a gas pipeline.

Detailed Description

The technical solution of the present utility model will be described in further detail with reference to the accompanying drawings, but the scope of the present utility model is not limited to the following description.

Example 1

Referring to fig. 1, the lining material for non-excavation repair of a gas pipeline comprises a tubular inner membrane 1 and a fiber hose 2, wherein the outer side of the inner membrane 1 is fixedly sleeved with the fiber hose 2, or the outer side of the fiber hose 2 is fixedly sleeved with the inner membrane 1, and the lining material can be used in two modes, wherein the inner membrane 1 in the lining material is ensured to be arranged on the outer side of the fiber hose 2 (if not, the lining material is turned over). By the arrangement, the lining material can be used for non-excavation repair of the gas pipeline.

The inner film 1 is a PE film or a TPU film, and the fiber hose 2 is formed by seamlessly weaving aramid fiber or polyester fiber or carbon fiber, so that the requirement of materials when the fiber hose is applied to a gas pipeline is met; the weaving lines of the fiber hose 2 are preferably net-shaped, and the weaving density range is 4*4-8 x 8/cm ² The yarn is woven by a circular loom.

The fixing mode between the inner film 1 and the fiber hose 2 is glue bonding or hot melt bonding.

Example 2

Referring to fig. 2 and 3, the lining structure for trenchless repairing of a gas pipeline comprises the lining material for trenchless repairing of a gas pipeline, and further comprises a repairing resin layer 3, wherein the repairing resin layer 3 is filled with repairing resin for coating a fiber hose 2, namely, the outer side or the inner side of the repairing resin layer 3 is in contact with an inner membrane 1, and in combination with a turnover lining method, specifically, after the inner membrane 1 in the lining material is ensured to be arranged outside the fiber hose 2, the lining material is vacuumized through a material pressing platform, and the repairing material is uniformly poured into the lining material, so that the lining structure with the latency characteristic is obtained, after the inner side of the inner membrane 1 is in contact with the outer side of the repairing resin layer 3, the inner side and the outer side of the lining structure are turned over after the subsequent inner turning operation of the gas pipeline, the inner side of the repairing resin layer 3 is in contact with the inner membrane 1, and the outer side of the repairing resin layer 3 is in contact with a gas pipeline 4.

Further, the thickness and inner diameter ranges of the inner film 1, the fiber hose 2 and the repair resin layer 3 are as follows: the thickness range of the inner film 1 is 0.8-1mm, the thickness range of the fiber hose 2 is 3-5mm, and the thickness range of the repairing resin layer 3 is 3-7mm; the inner diameters are all 150-1200mm.

Example 3

When the non-excavation repair of the gas pipeline is carried out, the method specifically comprises the following steps:

firstly, the inner film 1 in the lining material is arranged on the outer side of the fiber hose 2, and if the fiber hose 2 is fixedly sleeved on the outer side of the inner film 1, the lining material is turned over firstly, so that the inner film 1 is arranged on the outer side of the fiber hose 2. And vacuumizing the lining material through a pressing platform, and uniformly filling the repairing material into the lining material to obtain the lining structure with the latent characteristic.

Among the repair materials are commonly: polyester resin, vinyl resin, epoxy resin, light-sensitive resin, and the like.

The formula of the selected repairing material comprises the following components: 10-20 parts of aliphatic epoxy resin, 80-90 parts of bisphenol A epoxy resin, 40-60 parts of anhydride curing agent, 2-5 parts of accelerator, 40-60 parts of aluminum hydroxide and 15-20 parts of carbon nano tube.

Further, the formula of the repairing material specifically comprises the following components: 15 parts of aliphatic epoxy resin, 85 parts of bisphenol A epoxy resin, 50 parts of anhydride curing agent, 3 parts of accelerator, 45.9 parts of aluminum hydroxide and 15.3 parts of carbon nano tubes.

During construction, the method is characterized by comprising the steps of carrying out pretreatment (such as construction preparation, ventilation/toxic gas detection, pipeline dredging, CCTV detection, detection report generation and pipeline pretreatment) on a gas pipeline to be repaired according to the existing non-excavation repair process, wherein the method also comprises the steps of basic layer cleaning, sand blasting, ultrahigh-pressure water jet rust removal and local polishing repair. After pretreatment is completed, winding the lining structure with the latent characteristic into a turning drum, and introducing compressed air to enable the lining structure to be turned over into a gas pipeline to be repaired;

after the lining structure reaches a set position, a turnover steam-blowing switch is started, 80-100 ℃ steam is introduced, the lining structure is circulated for 1-2 hours, the lining structure is solidified and molded, and finally, the site is detected and cleaned, and the completion acceptance is achieved.

The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims

1. The lining material for the non-excavation repair of the gas pipeline is characterized by comprising an inner membrane (1) and a fiber hose (2), wherein the inner membrane (1) is tubular, the fiber hose (2) is fixedly sleeved on the outer side of the inner membrane (1), or the inner membrane (1) is fixedly sleeved on the outer side of the fiber hose (2).

2. Lining material for non-excavation repair of gas pipelines according to claim 1, characterized in that the inner membrane (1) is a PE membrane or a TPU membrane;

the fiber hose (2) is formed by seamlessly knitting aramid fiber or polyester fiber.

3. Lining material for non-excavation repair of gas pipelines according to claim 1, characterized in that the thickness of the inner film (1) ranges from 0.8 to 1mm;

the thickness of the fiber hose (2) ranges from 3 mm to 5mm.

4. Lining material for non-excavation repair of gas pipelines according to claim 2, characterized in that the woven texture of the fiber hose (2) is net-shaped.

5. Lining material for trenchless rehabilitation of gas pipelines according to claim 4, characterized in that the braiding density of the fiber hose (2) is in the range 4*4-8 x 8/cm ² 。

6. The lining material for trenchless rehabilitation of gas pipelines according to any of claims 1 to 5, wherein the fixing means is glue bonding or hot melt bonding.

7. Lining structure for the trenchless rehabilitation of gas pipelines, characterized in that it comprises a lining material for the trenchless rehabilitation of gas pipelines according to any of claims 1 to 6, and further comprises a layer of rehabilitation resin (3), said layer of rehabilitation resin (3) being filled with a rehabilitation resin coating said fiber hose (2).

8. The lining structure for trenchless rehabilitation of gas pipelines according to claim 7, wherein the inner side of the rehabilitation resin layer (3) is in contact with the inner membrane (1) and the outer side is in contact with the inner side wall of the gas pipeline (4).

9. Lining structure for the trenchless rehabilitation of gas pipelines according to claim 7, characterized in that the thickness of the rehabilitation resin layer (3) ranges from 3 to 7mm.

10. Lining structure for non-excavation repair of gas pipelines according to any of claims 7 to 9, characterized in that the inner diameter of the inner membrane (1) ranges from 150 to 1200mm;

and/or the inner diameter of the fiber hose (2) ranges from 150 to 1200mm;

and/or the inner diameter of the repair resin layer (3) is in the range of 150-1200mm.