Anti-mis-triggering flameproof device safety assembly

Abstract

The utility model relates to a kind of anti-misfire's explosion-proof device safety assembly, including outer piston, and locking sleeve is set on outer piston along axial direction, further including rigid connecting piece, the rigid connecting piece is respectively fixedly arranged with locking sleeve, outer piston along axial direction, and the rigid connecting piece is at least detachably connected with one of locking sleeve and outer piston. The utility model is detachably fixed with the rigid connecting piece of locking sleeve and outer piston by being set respectively, the relative fixation of locking sleeve and outer piston is guaranteed, the situation that explosion-proof device is triggered due to misfire locking sleeve is avoided, to ensure that the high-pressure gas eruption safety accident caused when explosion-proof device is overhauled or transported.

Description

Technical Field

[0001] This utility model relates to the field of coal mine equipment technology, and in particular to explosion-proof equipment for coal mine roadways, specifically a safety component of an explosion-proof device to prevent accidental triggering. Background Technology

[0002] Explosion-proof devices in coal mines are a widely used type of tunnel equipment. They can promptly block the spread of flames in the event of an explosion underground, thereby reducing losses and preventing the explosion from causing greater damage.

[0003] Currently, most commonly used explosion-proof devices employ an outer piston and an inner piston structure. One end of the inner piston is inserted into the outer piston, and a steel ball restricts the forward and backward movement of the inner piston. A locking sleeve is fitted onto the outer piston, restricting the radial movement of the steel ball and ensuring the reliability of the inner piston's positioning. In the event of an explosion, the shock wave generated by the explosion pushes the shock wave receiving rod of the explosion-proof device. The shock wave receiving rod then pushes the locking sleeve, causing it to lose its radial restraint on the steel ball. The steel ball moves radially outward, losing its restraint on the inner piston. Under the action of the internal high-pressure gas, the inner piston moves forward, opening the outlet channel for the extinguishing powder. The extinguishing powder, under the action of the internal high-pressure gas, is then ejected, blocking the flame and achieving explosion-proof protection.

[0004] Because the explosion-proof device contains high-pressure gas, it is essential to ensure that the locking sleeve does not undergo axial displacement during transportation and installation to guarantee the restraint of the steel ball. To this end, a safety bolt is usually installed on the locking sleeve. The safety bolt is used to radially tighten the outer piston, thereby preventing the locking sleeve from moving. After the installation in the tunnel is completed, the safety bolt is loosened to ensure that the locking sleeve can be displaced in time in the event of an explosion.

[0005] Furthermore, in order to improve the reliability of the safety bolt limit and avoid relying solely on friction for fixation, a groove is usually provided on the surface of the outer piston so that the safety bolt extends into the groove. Even if the safety bolt becomes loose, the side wall of the groove can be used to block the movement of the safety bolt, thereby preventing the locking sleeve from moving axially.

[0006] However, in actual processing, in order to facilitate the safety bolt to extend into the groove, the width of the groove is often set to be greater than the diameter of the safety bolt, leaving sufficient margin. In this case, there is a risk that the safety bolt may be axially displaced relative to the outer piston. In addition, due to the error in the machining of the parts, even if the safety bolt is in the groove, the movement of the locking sleeve may cause it to lose its restraint on the steel ball, resulting in a safety accident caused by accidental contact during maintenance or disassembly, which may lead to the release of high-pressure gas and injury. Utility Model Content

[0007] This invention addresses the shortcomings of existing technologies by providing a safety component for an explosion-proof device that prevents accidental triggering, thereby improving the reliability of the locking sleeve and outer piston in terms of relative fixation during transportation and disassembly.

[0008] This utility model is achieved through the following technical solution: a safety component for an explosion-proof device to prevent accidental triggering is provided, including an outer piston and a locking sleeve axially sleeved on the outer piston, and a rigid connecting member. The rigid connecting member is fixedly arranged axially relative to the locking sleeve and the outer piston, and the rigid connecting member is detachably connected to at least one of the locking sleeve and the outer piston.

[0009] This solution uses a rigid connector to fix the locking sleeve and the outer piston axially, preventing relative axial displacement between them. The rigid connector can be detachably connected to the locking sleeve, or detachably connected to the outer piston, or detachably connected to both the locking sleeve and the outer piston. This allows the axial relative fixation between the locking sleeve and the outer piston to be released after the explosion-proof device is installed, ensuring reliable movement of the locking sleeve in the event of an explosion.

[0010] As an optimization, the rigid connector includes a block and a hook fixed to the side of the block facing the locking sleeve. The block is fixed to the outer piston by fixing bolts, and the locking sleeve has a hook groove adapted to the hook. In this optimized solution, the rigid connector is bolted to the outer piston via the block, and the connection between the locking sleeve and the rigid connector is achieved through the cooperation of the hook and the hook groove. This design is simple in structure, facilitates the assembly and disassembly of the rigid connector, and ensures the reliability of axially fixing the locking sleeve and the outer piston.

[0011] As an optimization, the fixing bolt passes radially through the block and extends to the outer piston, and the side wall of the outer piston has a threaded hole adapted to the fixing bolt. In this optimized design, the fixing bolt is arranged radially, facilitating its tightening operation, and the threaded hole on the outer piston makes it easier to press and fix the block.

[0012] As an optimization, the block is fan-shaped, and its inner diameter matches the outer diameter of the outer piston. This optimization ensures that the inner arc surface of the block fits snugly against the outer arc surface of the outer piston, improving the stability of the block after installation.

[0013] As an optimization, the hook groove is circumferentially continuous, and the curvature of the hook body is adapted to the hook groove. This optimized solution sets the hook groove to be circumferentially continuous, which not only facilitates processing but also reduces the requirements for the installation position of the block, allowing the hook body to be hooked and connected to the hook groove at any position of the block along the circumference.

[0014] As an optimization, the rigid connector is a connecting plate, one end of which is fixed to the locking sleeve by bolts, and the other end is fixed to the outer piston by bolts. This optimized solution uses a connecting plate as the rigid connector, which simplifies the structure and prevents axial relative displacement between the locking sleeve and the outer piston.

[0015] As an optimization, there are several connecting plates, and each connecting plate is evenly distributed along the circumference. This optimized solution, with multiple connecting plates arranged along the circumference, further ensures the reliability of the locking sleeve and the outer piston being relatively fixed.

[0016] The beneficial effects of this utility model are as follows: by setting rigid connecting parts that are detachably fixed to the locking sleeve and the outer piston respectively, the locking sleeve and the outer piston are kept relatively fixed, avoiding the situation where the explosion-proof device is triggered due to accidental contact with the locking sleeve, thereby ensuring the safety of high-pressure gas ejection accidents during the maintenance or transportation of the explosion-proof device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 for Figure 1 Enlarged view of a portion of the image; Figure 3 This is a schematic diagram of the block cross-sectional structure of Example 1; Figure 4 This is a side view of the block in Embodiment 1; Figure 5 This is a partially enlarged structural schematic diagram of Embodiment 2 of this utility model; As shown in the figure: 1. Locking sleeve, 2. Block, 3. Outer piston, 4. High-pressure air chamber, 5. Inner piston, 6. Steel ball, 7. Shock wave receiving rod, 8. Fixing bolt, 9. Hook, 10. Through hole, 11. Connecting plate. Detailed Implementation

[0018] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0019] like Figure 1 The explosion-proof device safety component shown includes an outer piston 3 and a locking sleeve 1 axially sleeved on the outer piston. Before the explosion-proof device is installed, the locking sleeve restricts the radial movement of the steel ball 6 in the side wall of the outer piston, thereby restricting the axial movement of the inner piston 5 and preventing the high-pressure gas in the high-pressure chamber 4 from being ejected.

[0020] To improve safety before the explosion-proof device is installed, this embodiment also includes a rigid connector. The rigid connector is fixedly arranged axially relative to the locking sleeve 1 and the outer piston 3, and the rigid connector is detachably connected to at least one of the locking sleeve and the outer piston. That is, the rigid connector is detachably connected to the locking sleeve, or the rigid connector is detachably connected to the outer piston, or the rigid connector is detachably connected to both the locking sleeve and the outer piston. This allows the rigid connector to be removed after the explosion-proof device is installed, thereby releasing the relative fixation between the locking sleeve and the outer piston and allowing the locking sleeve to move axially relative to the outer piston.

[0021] The rigid connector in this embodiment includes a block 2 and a hook 9 fixed to the side of the block facing the locking sleeve. The block is fixed to the outer piston 3 by a fixing bolt 8. The locking sleeve 1 is provided with a hook groove that matches the hook 9.

[0022] Specifically, the fixing bolt 8 passes radially through the block 2 and extends to the outer piston 3. The side wall of the outer piston 3 is provided with a threaded hole adapted to the fixing bolt 8. The block is provided with a through hole 10 for the fixing bolt 8 to pass through. The through hole is a smooth hole to facilitate the connection between the fixing bolt and the threaded hole of the outer piston.

[0023] In order to make the block fit snugly against the outer piston, the block in this embodiment is fan-shaped, and the inner diameter of the block is adapted to the outer diameter of the outer piston where it is located, which improves the stability of the block after installation.

[0024] The hook groove runs circumferentially through the block, and the arc of the hook body is adapted to the hook groove, allowing the hook body to be connected to the hook groove at any position in the circumferential direction. The hook groove extends inward from the outer arc surface of the locking sleeve, forming a groove that runs radially outward. During installation, the hook body is inserted radially from the outside to the inside into the hook groove, and then fixed with fixing bolts 8. After the explosion-proof device is installed, the fixing bolts are removed, and the block can be taken away, which is very convenient.

[0025] The outer piston 3, inner piston 5, high-pressure gas chamber 4, steel ball 6, and shock wave receiving rod 7 mentioned in this embodiment are all common structures in existing explosion-proof devices, and will not be described in detail here.

[0026] Example 2 The difference between this embodiment and Embodiment 1 is that the rigid connecting member is a connecting plate 11. One end of the connecting plate 11 is fixed to the locking sleeve 1 by bolts, and the other end is fixed to the outer piston 3 by bolts.

[0027] In this embodiment, the connecting plate is a steel plate with a thickness of not less than 2mm to ensure sufficient rigidity to meet the requirements of axial tension and compression. There are several connecting plates, and each connecting plate is evenly distributed along the circumference.

[0028] After using the solution of this utility model, during the transportation or installation of the explosion-proof device, the locking sleeve restricts the radial displacement of the steel ball 6, thereby restricting the axial displacement of the inner piston 5. A rigid connector is used to fix the locking sleeve and the outer piston relatively, preventing the locking sleeve from moving even if an explosion does not occur. After the explosion-proof device is installed in the tunnel, the rigid connector is removed to ensure that the thrust of the shock wave receiving rod 7 is transmitted to the locking sleeve. This ensures that after an explosion, the locking sleeve can move promptly to release the steel ball, thus ensuring the reliability of the extinguishing powder spray.

[0029] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A safety component for an explosion-proof device to prevent accidental triggering, comprising an outer piston (3) and a locking sleeve (1) axially sleeved on the outer piston, characterized in that: It also includes a rigid connector, which is fixedly disposed axially relative to the locking sleeve (1) and the outer piston (3), and the rigid connector is detachably connected to at least one of the locking sleeve and the outer piston.

2. The explosion-proof device safety component for preventing accidental triggering according to claim 1, characterized in that: The rigid connector includes a block (2) and a hook (9) fixed on the side of the block facing the locking sleeve. The block is fixed to the outer piston (3) by a fixing bolt (8). The locking sleeve (1) is provided with a hook groove that is adapted to the hook (9).

3. The explosion-proof device safety component for preventing accidental triggering according to claim 2, characterized in that: The fixing bolt (8) passes through the block (2) radially and extends to the outer piston (3). The side wall of the outer piston (3) is provided with a threaded hole that is compatible with the fixing bolt (8).

4. The explosion-proof device safety component for preventing accidental triggering according to claim 2, characterized in that: The block is fan-shaped, and its inner diameter is adapted to the outer diameter of the outer piston.

5. A safety component for an explosion-proof device to prevent accidental triggering according to claim 2, characterized in that: The hook groove runs circumferentially through the hook, and the curvature of the hook body is adapted to the hook groove.

6. The explosion-proof device safety component for preventing accidental triggering according to claim 1, characterized in that: The rigid connector is a connecting plate (11). One end of the connecting plate (11) is fixed to the locking sleeve (1) by bolts, and the other end is fixed to the outer piston (3) by bolts.

7. A safety component for an explosion-proof device to prevent accidental triggering according to claim 6, characterized in that: There are several connecting plates, and each connecting plate is evenly distributed along the circumference.

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