Quick sealing device for rescue through closed wall

Abstract

The utility model discloses a closed wall rescue quick sealing device for solving the closed wall closed stage, due to the reduction of disaster sudden work surface air flow, it is easy to cause gas gathering, and the matched automatic delay closing system is convenient for relevant personnel evacuation, belongs to the underground disaster sudden safety protection technical field. The utility model discloses a leak -off explosion portion, set explosion portion and intermediate pipe body portion, set explosion portion installs in one side of closed wall wall body, and towards disaster sudden surface, the intermediate pipe body portion is piled up in the closed wall wall body, and with closed wall wall body perpendicularly to set, leak -off explosion portion installs in the other side of closed wall wall body, and towards the roadway top, leak -off explosion portion with the intermediate pipe body portion communicates, set explosion portion with the intermediate pipe body portion communicates, leak -off explosion portion one side swing joint has the leak -off explosion cover.

Description

Technical Field

[0001] This utility model belongs to the field of underground disaster safety protection technology, and specifically relates to a rapid sealing device for closed-wall rescue. Background Technology

[0002] Coal mine fires and gas explosions are major hidden dangers threatening safe production. After a disaster occurs, materials such as sand, gravel, and concrete are usually used to manually build a closed wall. As the construction of the closed wall progresses and the sealing stage approaches, the reduced airflow at the disaster-stricken working face can easily lead to gas accumulation, increasing the risk of explosion.

[0003] The design of sealed walls is intended to address the risks of secondary outbursts in coal mines, including the construction of sealed walls, monitoring and control of the outburst face, and prevention of potential secondary outbursts. Following an outburst, national standards require the construction of sealed walls of varying thicknesses, depending on the gas emission rate and the size of the ventilation section, to block airflow and retard with nitrogen. During the construction of these sealed walls, ventilation gradually decreases as the ventilation section nears closure, leading to a gradual increase in gas concentration at the outburst face. This creates a constant risk of explosion, directly endangering the lives of construction workers.

[0004] Existing traditional sealing devices have the following drawbacks: (1) The delayed shutdown procedure is cumbersome. Traditional sealing devices use a bucket to collect and release water to achieve delayed closing and opening of the explosion-proof door. This requires drilling holes in the tunnel roof for installation, which is time-consuming and labor-intensive, and personnel safety cannot be guaranteed when filling with water.

[0005] (2) Traditional sealing device connection methods are complex Traditional closure devices use bolted connections for the intermediate flange, which is time-consuming and labor-intensive to install. (3) Poor corrosion resistance in extreme environments Traditional sealing devices are made of ordinary carbon steel, which not only has low strength but also poor corrosion resistance. (4) Poor explosion-proof performance Traditional sealing devices lack explosion-proof insulation coatings on their surfaces, and collisions during construction can easily generate sparks, increasing the risk of gas explosions. Utility Model Content

[0006] The purpose of this utility model is to provide a rapid sealing device for closed-wall rescue, which is used to solve the problem that gas can easily accumulate due to the reduction of airflow at the disaster-prone working face during the near-closed-wall sealing stage, and to provide an automatic delayed shutdown system to facilitate the evacuation of relevant personnel.

[0007] This utility model is achieved using the following technical solution: The closed-wall rescue rapid sealing device includes a venting section, a blast-collecting section, and an intermediate pipe section. The blast-collecting section is installed on one side of the closed wall and faces the disaster surface. The intermediate pipe section is stacked inside the closed wall and is set perpendicular to the closed wall. The venting section is installed on the other side of the closed wall and faces the top of the tunnel. The venting section and the intermediate pipe section are connected. The blast-collecting section and the intermediate pipe section are connected. A venting cover is rotatably connected to one side of the venting section.

[0008] After a coal mine disaster occurs, this utility model is installed inside the closed wall during the construction of the closed wall. After the closed wall is completed, the construction workers gently lift the explosion relief cover to a vertical position at the opening of the explosion relief section. Relevant personnel can use this utility model to safely evacuate. When an explosion occurs, the shock wave passes through the explosion collection section, the intermediate pipe section and the explosion relief section in sequence, and finally releases pressure by lifting the explosion relief cover with the shock wave. After the pressure is released, the explosion relief cover automatically closes by its own weight.

[0009] Further preferably, the explosion venting section is also equipped with an explosion venting device and an automatic delayed closing system. The explosion venting cover is rotatably connected to one side of the explosion venting device via a rotating shaft, and the explosion venting cover at least completely covers the opening of the explosion venting device. The other side of the explosion venting device is fixedly connected to the intermediate pipe body. One side of the explosion venting device is set upwards and forms a 30° to 60° angle with the other side. The automatic delayed closing system includes two support cylinders and a delay regulating valve. The delay regulating valve controls the opening of the support cylinders. The two support cylinders are installed on both sides of the explosion venting cover. In application, after the closed wall masonry construction is completed and relevant personnel evacuate, the opening angle of the explosion venting cover is between 70° and 100°, with the optimal opening angle being 90°. The two support cylinders support the explosion venting cover behind it, and the delay regulating valve is opened. At this time, the explosion venting cover acts on the support cylinders under its own weight. The support cylinder slowly closes by releasing air through the opening of the delay regulating valve. After the explosion vent cover descends to a certain height, the support cylinder disengages from the explosion vent cover, and the explosion vent cover continues to close under its own weight.

[0010] Further preferably, a double torsion spring is provided at the pivot point of the explosion vent cover. With the double torsion spring at the pivot point, the explosion vent cover can further act on the supporting cylinder through the force of the double torsion spring.

[0011] More preferably, the explosion relief device is positioned with one side facing upwards and forming a 45° angle with the other side.

[0012] More preferably, one side of the explosive focusing section is configured with a flared opening, which faces the disaster eruption surface. The flared opening increases the shock wave collection range.

[0013] More preferably, the horn portion of the horn opening has an angle of 10° to 50°.

[0014] More preferably, the flare opening is provided with an openable backfire prevention mesh device, which is used to block the flames when a disaster occurs.

[0015] In a further preferred embodiment, the explosion-collecting section, the explosion-venting section, and the intermediate pipe section are respectively connected by a flat flange with fixed concave and convex wedges. The flat flange of the concave and convex wedges is tightened by turning a knob at 15° to 25° to ensure a tight engagement between the convex and concave wedges. The flat flange of the concave and convex wedges can be securely connected by the tight engagement between the convex and concave wedges, which is convenient and quick.

[0016] Preferably, the explosion venting section, the explosion collection section, and the intermediate pipe section are made of 304 stainless steel, which can cope with various complex and humid environments in coal mines and ensure overall strength.

[0017] In a further preferred embodiment, the inner and outer surfaces of the explosion venting section, the explosion collection section, and the intermediate tube section are all coated with insulating arc-resistant paint, and flame-retardant rubber pads are placed at the connection points of the explosion venting section, the explosion collection section, and the intermediate tube section. This not only achieves flame retardancy but also prevents sparks from being generated by collisions between components, thereby improving the explosion-proof and flame-retardant performance.

[0018] During the construction of the closed wall, this utility model is fixedly built into the closed wall according to the size of the ventilation cross-sectional area and the level of gas concentration, maintaining a certain amount of ventilation, which can effectively reduce the accumulation of gas and reduce the risk of explosion. At the same time, the delayed closing function of this utility model can meet the requirement of complete evacuation of personnel to a safe area, greatly ensuring the safe evacuation of construction personnel. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the independent tube body of this utility model.

[0023] Figure 3 This utility model Figure 2 Schematic diagram of direction D.

[0024] Figure 4 This utility model Figure 2 Schematic diagram of the E direction.

[0025] In the diagram: 1-Explosion relief section, 11-Explosion relief cover, 12-Double torsion spring, 13-Support cylinder, 2-Explosion collection section, 21-Bell mouth, 22-Anti-backfire mesh, 3-Intermediate pipe section, 4-Flat flange, 5-Concave wedge block, 6-Convex wedge block, 7-Handle, 8-Positioning block. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0027] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0029] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Example

[0030] The closed-wall rescue rapid sealing device includes a venting section 1, a venting section 2, and an intermediate tube section 3. The venting section 2 is installed on one side of the closed wall and faces the disaster surface. The intermediate tube section 3 is stacked inside the closed wall and is set perpendicular to the closed wall. The venting section 1 is installed on the other side of the closed wall and faces the top of the tunnel. The venting section 1 is connected to the intermediate tube section 3, and the venting section 2 is connected to the intermediate tube section 3. A venting cover 11 is rotatably connected to one side of the venting section 1.

[0031] The explosion venting section 1 is also equipped with an explosion venting device and an automatic delay closing system. The explosion venting cover 11 is rotatably connected to one side of the explosion venting device via a rotating shaft, and the explosion venting cover 11 at least completely covers the opening of the explosion venting device. The other side of the explosion venting device is fixedly connected to the intermediate tube section 3. One side of the explosion venting device is set upward and forms a 30° to 60° angle with the other side. The automatic delay closing system includes two support cylinders 13 and a delay regulating valve. The delay regulating valve controls the opening of the support cylinders 13. The two support cylinders 13 are installed on both sides of the explosion venting cover 11. In actual use, the delay length can be adjusted by adjusting the delay regulating valve to achieve a delay duration of 10 to 30 minutes.

[0032] A double torsion spring 12 is provided at the pivot of the explosion relief cover 11. The curved tube design of the explosion relief device utilizes the self-weight of the explosion relief cover 11 and the pressure of the double torsion spring 12 to achieve delayed closing and automatic reset of the explosion relief cover 11 after the explosion, thus realizing the sealing of this utility model.

[0033] The explosion relief device is positioned with one side facing upwards and forming a 45° angle with the other side.

[0034] One side of the explosive charge section 2 is configured with a flared opening 21, which faces the disaster eruption surface.

[0035] The horn portion of the horn opening 21 has an angle of 10° to 50°. In this embodiment, the optimal angle for the horn portion of the horn opening 21 is 30°.

[0036] The flare opening 21 is equipped with an openable backfire prevention mesh 22.

[0037] The explosive gathering section 2, the explosive venting section 1, and the intermediate pipe section 3 are respectively connected by a flat flange 4 with a fixed concave-convex wedge 6. The flat flange 4 with the concave-convex wedge 6 is turned at 15° to 25° to ensure a tight engagement between the convex wedge 6 and the concave wedge 5. In this embodiment, the flat flange 4 with the concave-convex wedge 6 enables a quick connection between the explosive gathering section 2, the explosive venting section 1, and the intermediate pipe section 3. The intermediate pipe section 3 is an independent pipe with a length of 1000mm that can be completely interchanged or replaced. The number of independent pipes used in the intermediate pipe section 3 is determined according to the thickness of the closed wall.

[0038] Specifically, the independent pipe body is equipped with multiple handles 7 for easy gripping during transportation and installation. The independent pipe body also has positioning blocks 8. After aligning the positioning blocks 8 between the independent pipe bodies, turning the knob 15° allows for quick positioning of the concave wedge block 5 and the convex wedge block 6, accelerating construction efficiency.

[0039] The explosion venting section 1, the explosion collection section 2, and the intermediate tube section 3 are made of 304 stainless steel.

[0040] The inner and outer surfaces of the explosion venting section 1, the explosion collection section 2, and the intermediate tube section 3 are all coated with insulating arc-resistant paint, and flame-retardant rubber pads are placed at the connection points of the explosion venting section 1, the explosion collection section 2, and the intermediate tube section 3.

[0041] The working principle is as follows: All components of this utility model are made of DN1000 304 stainless steel to ensure personnel access. The inner and outer surfaces are uniformly coated with a 200μm thick arc-resistant insulating varnish to ensure safety during transportation and installation. After the closed wall is constructed, construction personnel gently lift the explosion relief cover 11 to a vertical position on one side of the explosion relief device. The support cylinder 13, pre-pressurized with 0.8MPa power air, is then placed on both sides of the explosion relief cover 11. The delay adjustment valve knob at the bottom of the support cylinder 13 is adjusted to a certain position (adjusted according to the time required to evacuate to a safe location, achieving a delay of 10-30 minutes), allowing for safe evacuation. After the set closing time is reached, the support cylinder 13 completely detaches from the explosion relief cover 11, and the explosion relief cover 11 is completely sealed shut.

[0042] When an explosion occurs at the disaster site, the high-temperature, high-pressure shock wave carrying smoke and fire passes through the backfire prevention net 22 of the explosion collection section 2 (which can block the flame ejection), through the intermediate pipe section 3, through the explosion venting section 1, and finally impacts the explosion venting cover 11 to open (opening pressure 0.4MPa), thereby releasing the shock wave pressure, ensuring the overall safety of the closed wall and preventing the occurrence of secondary disasters.

[0043] The backfire prevention mesh 22 can be opened horizontally at the horn opening 21, and the explosion relief cover 11 faces the top of the tunnel, so as to facilitate automatic reset after explosion and pressure relief.

[0044] This utility model is a rapid sealing and explosion-proof pressure relief device that is simultaneously installed inside a sealed wall during the construction of a sealed wall after a coal mine disaster. It also serves as a passage for personnel to enter and exit the disaster area after the sealed wall is completed. The overall design of this utility model adopts a modular combination, which not only facilitates transportation, but also makes the installation process convenient and efficient, and has extremely high practicality and value.

[0045] During the construction of the sealed wall, the installation of this utility model can maintain a certain amount of ventilation. In practical applications, depending on the specific circumstances of a disaster, 1-3 sets can be installed in the same sealed wall to ensure ventilation and explosion venting requirements during construction, and to ensure the safety of personnel during construction. If multiple sets are installed, one set should be placed near the bottom of the sealed wall to facilitate personnel passage, and 1-2 sets should be placed in the middle of the sealed wall to facilitate explosion venting and pressure relief in the event of a disaster.

[0046] This invention achieves rapid connection by welding concave and convex wedges 6 to the end face of the flat flange 4.

[0047] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A closed-wall emergency rapid sealing device, characterized in that: It includes a venting section (1), a venting section (2), and an intermediate pipe section (3). The venting section (2) is installed on one side of the closed wall and faces the disaster surface. The intermediate pipe section (3) is stacked inside the closed wall and is set perpendicular to the closed wall. The venting section (1) is installed on the other side of the closed wall and faces the top of the roadway. The venting section (1) is connected to the intermediate pipe section (3), and the venting section (2) is connected to the intermediate pipe section (3). A venting cover (11) is rotatably connected to one side of the venting section (1).

2. The closed-wall rescue rapid sealing device according to claim 1, characterized in that: The explosion relief section (1) is also equipped with an explosion relief device and an automatic delay closing system. The explosion relief cover (11) is rotatably connected to one side of the explosion relief device via a rotating shaft, and the explosion relief cover (11) at least completely covers the opening of the explosion relief device. The other side of the explosion relief device is fixedly connected to the middle tube section (3). One side of the explosion relief device is set upward and forms a 30° to 60° angle with the other side. The automatic delay closing system includes two support cylinders (13) and a delay regulating valve. The delay regulating valve controls the opening of the support cylinders (13). The two support cylinders (13) are installed on both sides of the explosion relief cover (11).

3. The closed-wall rescue rapid sealing device according to claim 2, characterized in that: A double torsion spring (12) is provided at the pivot of the explosion relief cover (11).

4. The closed-wall rescue rapid sealing device according to claim 2, characterized in that: The explosion relief device is positioned with one side facing upwards and forming a 45° angle with the other side.

5. The closed-wall rescue rapid sealing device according to claim 1, characterized in that: The explosive section (2) has a horn-shaped opening (21) on one side, and the horn-shaped opening (21) faces the disaster surface.

6. The closed-wall rescue rapid sealing device according to claim 5, characterized in that: The horn section of the horn (21) is 10° to 50°.

7. The closed-wall rescue rapid sealing device according to claim 6, characterized in that: The flare opening (21) is equipped with an openable backfire prevention mesh (22).

8. The closed-wall rescue rapid sealing device according to any one of claims 1-7, characterized in that: The explosive collection section (2), the explosive venting section (1), and the intermediate tube section (3) are respectively connected by a flat flange (4) with a fixed concave and convex wedge (6). The flat flange (4) of the concave and convex wedge (6) is turned by a knob from 15° to 25° to make the convex wedge (6) and the concave wedge (5) tightly engaged.

9. The closed-wall rescue rapid sealing device according to any one of claims 1-7, characterized in that: The explosion relief section (1), the explosion collection section (2), and the intermediate tube section (3) are made of 304 stainless steel.

10. The closed-wall rescue rapid sealing device according to any one of claims 1-7, characterized in that: The inner and outer surfaces of the explosion venting part (1), the explosion collection part (2), and the intermediate tube part (3) are all coated with insulating arc-resistant paint, and flame-retardant rubber pads are placed at the connection points of the explosion venting part (1), the explosion collection part (2), and the intermediate tube part (3).

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