A glue injection and repair clamp for coal mine gas drainage pipelines

Abstract

This utility model relates to the technical field of pipeline repair devices, and discloses a glue injection repair fixture for coal mine gas extraction pipelines. It includes a pressure plate positioned corresponding to the damaged section of the pipeline, a glue-containing space between the inner wall of the pressure plate and the outer wall of the pipeline, and a fixing structure for fixing the pressure plate to the outer wall of the pipeline. A closed structure is provided between the pressure plate and the pipeline, surrounding the glue-containing space. The pressure plate has radially penetrating injection holes for injecting glue into the glue-containing space. This utility model achieves glue injection repair of the damaged area by setting a pressure plate outside the pipeline damaged section and creating a glue-containing space between the pressure plate and the outer wall of the pipeline to cover the damaged section. The operation is simple and the cost is low.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline repair devices, specifically to a glue injection repair fixture for coal mine gas extraction pipelines. Background Technology

[0002] As a crucial component of gas transportation, the sealing performance of underground gas extraction pipelines directly determines the efficiency and utilization rate of gas extraction. However, due to the limited space in underground operations, pipeline leaks caused by external forces occur frequently, seriously affecting gas extraction and gas power generation.

[0003] Due to the limited space in underground coal mines, methods for repairing damaged pipelines must be lightweight, safe, and practical. Currently, there are almost no dedicated repair devices for leaking gas drainage pipelines in underground coal mines. Common repair methods include composite material wrapping, applying adhesive to the damaged area, or a combination of both. These methods are generally not very effective, especially for pipelines with complex damage shapes. For example, applying adhesive requires curing time, and during this curing period, the pressurized drainage pipeline may draw the adhesive into the pipeline, affecting the repair effect. Wrapping composite materials is complex, the composite materials themselves are expensive, and the process requires impregnation with a special resin, which also takes a long time to cure. Therefore, there is a need for a repair device that is simple to operate, low in cost, and specifically designed for drainage pipelines. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a glue injection repair fixture for coal mine gas extraction pipelines. By setting a pressure plate outside the pipeline damage opening and setting a glue-containing space between the pressure plate and the outer wall of the pipeline to cover the damage opening, glue injection repair of the damaged position can be achieved. The operation is simple and the cost is low.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a glue injection and repair fixture for a coal mine gas extraction pipeline, comprising a pressure plate corresponding to the damaged opening of the pipeline, a glue accommodating space between the inner wall of the pressure plate and the outer wall of the pipeline, and a fixing structure for fixing the pressure plate to the outer wall of the pipeline. A closed structure is provided between the pressure plate and the pipe, surrounding the adhesive containment space; The pressure plate has radially through-holes for injecting glue into the space.

[0006] Furthermore, an injection tube is installed inside the injection hole; a one-way valve is installed inside the injection tube.

[0007] Furthermore, the shape of the inner side of the pressure plate is adapted to the outer wall of the pipe.

[0008] Furthermore, the fixing structure includes a limiting ring disposed on the outside of the pressure plate, and a fixing ring disposed inside the limiting ring and fitting against the outside of the pressure plate and the outside of the pipe.

[0009] Furthermore, the shape of the outer side of the pressure plate is adapted to the shape of the inner side of the fixing ring.

[0010] Furthermore, the sealing structure includes a groove formed inside the pressure plate and surrounding the break, and a sealing ring accommodated within the groove.

[0011] Furthermore, the thickness of the sealing ring is greater than the depth of the groove.

[0012] The beneficial effects of this utility model are as follows: By setting a pressure plate outside the pipe break, and creating an adhesive-containing space between the pressure plate and the outer wall of the pipe to cover the break, adhesive injection repair of the broken area is achieved, improving the repair effect. The operation is simple and the cost is low. A sealing ring ensures that the adhesive is completely contained within the adhesive-containing space, preventing the adhesive coating area from expanding and allowing for precise repair. The adhesive coating area is confined within the adhesive-containing space by the sealing ring, pressure plate, and pipe, forming a relatively sealed space and preventing adhesive from being sucked into the pipe, thus achieving pressurized repair. Compared to existing methods of directly applying adhesive to the broken area, this solution allows the adhesive around the broken area to solidify better, resulting in a more significant improvement in repair effect for complex-shaped breaks. The repair area is triple-protected by the adhesive, pressure plate, and limiting ring, ensuring a long-term repair effect. A one-way valve prevents backflow. Even after the repair is complete and the adhesive has cured, the limiting ring and airbag can be removed. Attached Figure Description

[0013] Figure 1 A schematic diagram of the installation structure of the adhesive injection repair fixture and the repaired pipe; Figure 2 This is a schematic diagram of the inner structure of the pressure plate; Figure 3 This is a schematic diagram of the outer structure of the pressure plate; Figure 4 This is a schematic diagram of the cross-sectional structure.

[0014] In the diagram: 1. Pressure plate; 2. Fixing ring; 3. Limiting ring; 4. Groove; 5. Sealing ring; 6. Injection tube; 7. Check valve; 8. Pipeline. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0017] Example: like Figures 1-4 As shown, a coal mine gas extraction pipeline adhesive injection repair clamp includes a pressure plate 1 corresponding to the damaged opening of the pipeline 8, an adhesive accommodating space between the inner wall of the pressure plate 1 and the outer wall of the pipeline 8, and a fixing structure for fixing the pressure plate 1 to the outer wall of the pipeline 8; the side of the pressure plate 1 closest to the pipeline 8 is the inner side, and the side opposite to the inner side is the outer side; the pipeline 8 is generally made of PVC. A closed structure is provided between the pressure plate 1 and the pipe 8, surrounding the adhesive containment space; The pressure plate 1 has a radial opening along the pipe 8, which is a space for filling glue with glue injection holes.

[0018] The glue injection hole is equipped with a glue injection tube 6; the glue injection tube 6 is equipped with a one-way valve 7; the glue injection tube 6 can be detachably fixed in the glue injection hole, for example by snap-fit ​​or interference fit.

[0019] The shape of the inner side of the pressure plate 1 is adapted to the outer wall of the pipe 8, so that the pressure plate 1 can be close to the pipe 8, and thus the sealing ring 5 can seal the glue-containing space.

[0020] The fixing structure includes a limiting ring 3 set on the outside of the pressure plate 1, and a fixing ring 2 inserted inside the limiting ring 3 and attached to the outside of the pressure plate 1 and the outside of the pipe 8; the fixing ring 2 can be circular or partially (at the contact point with the pressure plate 1) protruding circular; the limiting ring 3 can be circular, arc-shaped, or have a cross-section of a C-shape, a U-shape, or a C-shape; the fixing ring 2 can be made of hook and loop fasteners such as nylon or polyester blend, and the adhesion is achieved through physical structure (such as hook side and napped side); it can also be made by binding with cloth strips, or by welding metal or alloy sleeves, etc.

[0021] The shape of the outer side of the pressure plate 1 is adapted to the shape of the inner side of the fixing ring 2, and the radius of the circle on the outer side of the pressure plate 1 is the same as the radius of the circle on the part where the fixing ring 2 and the pressure plate 1 are in contact.

[0022] The sealing structure includes a groove 4 formed inside the pressure plate 1 and surrounding the damaged opening, and a sealing ring 5 housed in the groove 4; when the pressure plate 1 is fixed to the outer wall of the pipe 8, the sealing ring 5 is compressed by the inside of the pressure plate 1 against the outer wall of the pipe 8; the sealing ring 5 is elastic and is a commonly used part, and the shape of the sealing ring 5 and the groove 4 is O-shaped or rectangular, etc.

[0023] Under normal conditions, the axial thickness of the sealing ring 5 is greater than the depth of the groove 4.

[0024] The pressure plate is made of PVC material, and the fixing ring is made of nylon cable ties, model MLZD-10, with a length of 1500 mm and a width of 10 mm. It is lightweight and durable, and highly adaptable to the narrow environment of underground coal mines, especially in roadways with multiple pipelines installed. The pressure plate adopts an arc-shaped design, with a limiting ring 3 on the outside and an annular groove and sealing ring on the inside. By tightening the fixing ring, the shell can be stably and tightly fixed to the outside of the pipeline 8 that needs to be repaired.

[0025] Working process: When repairing a leaking gas extraction pipeline with adhesive, the pressure plate 1 is fixed to the outer wall of the pipeline 8 to be repaired using the fixing ring 2, and the pressure plate 1 completely covers the area to be repaired. Tighten the fixing ring 2 to press the sealing ring tightly against the inner wall of the pressure plate 1 and the outer wall of the pipeline 8 to form a relatively sealed space, preventing the injected adhesive from being sucked into the gas extraction pipeline.

[0026] Pipeline sealing adhesive is injected into the space formed by the inner wall of the pressure plate, the outer wall of the repaired pipe, and the sealing ring through the one-way valve and the injection hole. Expelled gas enters the gas extraction pipe through the leak. The pipeline sealing adhesive solidifies and blocks the leak, while forming a large-area thin adhesive repair layer on the outer wall of the pipe, thus achieving the adhesive injection repair of the gas extraction pipe.

[0027] In this solution, the pressure plate adopts an arc-shaped design and is equipped with a limiting ring and a sealing ring. The sealing ring prevents the inner wall of the pressure plate from directly contacting the outer wall of the repair pipe. After the colloid solidifies, a thin adhesive repair layer with a large area can be formed on the outer wall of the pipe, which improves the repair efficiency and ensures the efficient extraction and utilization of coal mine gas.

[0028] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A glue injection and repair clamp for coal mine gas drainage pipelines, characterized in that: It includes a pressure plate (1) provided for the damaged opening of the pipe (8), an adhesive accommodating space provided between the inner wall of the pressure plate (1) and the outer wall of the pipe (8), and a fixing structure for fixing the pressure plate (1) to the outer wall of the pipe (8); A closed structure is provided between the pressure plate (1) and the pipe (8) and around the glue accommodating space; The pressure plate (1) has a radially penetrating hole for injecting glue into the glue container.

2. The adhesive injection and repair clamp for a coal mine gas drainage pipeline according to claim 1, characterized in that: The injection hole is provided with an injection tube (6); the injection tube (6) is provided with a one-way valve (7).

3. The adhesive injection and repair clamp for a coal mine gas drainage pipeline according to claim 1, characterized in that: The shape of the inner side of the pressure plate (1) is adapted to the outer wall of the pipe (8).

4. The adhesive injection and repair clamp for a coal mine gas drainage pipeline according to claim 1, characterized in that: The fixing structure includes a limiting ring (3) set on the outside of the pressure plate (1) and a fixing ring (2) that passes through the limiting ring (3) and fits the outside of the pressure plate (1) and the outside of the pipe (8).

5. A glue injection and repair fixture for a coal mine gas drainage pipeline according to claim 4, characterized in that: The shape of the outer side of the pressure plate (1) is adapted to the shape of the inner side of the fixing ring (2).

6. The adhesive injection and repair clamp for a coal mine gas drainage pipeline according to claim 1, characterized in that: The closed structure includes a groove (4) formed inside the pressure plate (1) and surrounding the damaged opening, and a sealing ring (5) housed in the groove (4).

7. A glue injection and repair fixture for a coal mine gas drainage pipeline according to claim 6, characterized in that: The thickness of the sealing ring (5) is greater than the depth of the groove (4).

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