A safety reinforced flameproof device locking assembly

Abstract

The utility model relates to a safe reinforced explosion-proof device locking assembly, including outer piston and the locking sleeve of setting in the outer piston front end, the outer piston is fixed with locking nut, the inner hole of locking nut is connected with locking screw through the thread, locking screw extends to the front and is connected with locking sleeve through the thread. The utility model discloses through setting locking screw, is connected with locking sleeve, locking nut through the thread respectively, utilizes the axial fixed characteristics of thread, avoided the relative displacement of locking sleeve and locking nut in the axial, avoided the trigger of explosion-proof device because of the mistake of touching locking sleeve, and locking screw transverse setting is connected with the shock wave receiving rod, is not easy to fall or lose, can better lead the attention of operator.

Description

Technical Field

[0001] This utility model relates to the field of coal mine equipment technology, and in particular to explosion-proof equipment used in coal mine roadways, specifically a safety-enhanced explosion-proof device locking assembly. 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 shift during transportation and installation to guarantee the reliability of the steel ball restraint. 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 shift in time in the event of an explosion.

[0005] However, after prolonged use, the safety bolts may loosen and fall off. If the operator is not careful and disassembles or moves the explosion-proof device, the locking sleeve may be accidentally touched, resulting in the release of high-pressure gas or injury from the steel ball, posing a safety hazard. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies by providing a safety-enhanced explosion-proof device locking assembly, which improves the reliability of the locking sleeve and outer piston in a relatively fixed state when not in operation.

[0007] This utility model is achieved through the following technical solution: a safety-enhanced explosion-proof device locking assembly is provided, including an outer piston and a locking sleeve sleeved on the front end of the outer piston. A locking nut is fixed on the outer piston, and a locking screw is threadedly connected to the inner hole of the locking nut. The locking screw extends forward and is threadedly connected to the locking sleeve.

[0008] This solution connects the locking screw to both the locking sleeve and the locking nut via threads. By utilizing the thread of the locking screw, relative displacement between the locking sleeve and the outer piston is prevented. Furthermore, the locking screw extends in the front-to-back direction, making it less prone to loosening or falling off, thus ensuring safety during installation and transportation. After installation, simply tighten the locking screw to disengage it from the locking nut.

[0009] As an optimization, the locking nut is located in the inner hole of the outer piston and is connected to the outer piston via a thread. This optimized solution sets the locking nut to be connected to the inner hole of the outer piston via a thread, which is simple in structure and facilitates the installation of the locking nut.

[0010] As an optimization, at least one insertion hole is provided on one side of the inner hole of the locking nut, and the insertion hole extends forward to the front end face of the locking nut. This optimization scheme, by providing the insertion hole, facilitates the formation of at least two insertion points with the inner hole of the locking nut for inserting a tightening tool, thereby facilitating the rotation operation of the locking nut.

[0011] As an optimization, a buffer pad is fixed to the rear end of the locking nut. This optimization, by setting the buffer pad, buffers the movement of the inner piston after an explosion, reducing damage to the locking nut.

[0012] As an optimization, the locking screw extends forward into a locking sleeve, and one end of the locking screw extending forward into the locking sleeve is fixedly connected to the shock wave receiving rod of the explosion-proof device. This optimized solution connects the locking screw to the shock wave receiving rod, ensuring the relative fixation of the shock wave receiving rod and the locking sleeve, triggering the explosion by pushing the locking sleeve, and also making the locking screw less likely to be lost.

[0013] As an optimization, the front end of the locking screw is provided with an internal threaded hole, through which the locking screw is fixedly connected to the shock wave receiving rod of the explosion-proof device. This optimized solution connects the locking screw and the shock wave receiving rod via a thread, facilitating disassembly and installation, and making transportation easier.

[0014] As an optimization, the locking sleeve includes a sleeve body that closes circumferentially and a cover body fixed to the front end of the sleeve body. The cover body has a through hole extending in the front-rear direction, and a sleeve extending in the front-rear direction is fixedly connected to the through hole. The inner hole of the sleeve is provided with a thread adapted to the locking screw. The locking sleeve structure of this optimized solution is simple, and the sleeve facilitates threaded connection with the locking screw.

[0015] As an optimization, the side wall of the locking sleeve is threaded with a safety bolt that extends radially towards the outer piston, and a back-tightening nut is threaded onto the safety bolt. This optimized solution simultaneously uses the safety bolt to fix the locking sleeve, working together with the locking screw to achieve double fixation and further improve safety.

[0016] The beneficial effects of this utility model are as follows: by setting a locking screw, which is connected to the locking sleeve and the locking nut by threads respectively, the axial fixing characteristic of the thread is used to avoid axial relative displacement between the locking sleeve and the locking nut, thus avoiding accidental contact with the locking sleeve and triggering of the explosion-proof device. In addition, the locking screw is set horizontally and connected to the shock wave receiving rod, so it is not easy to fall off or lose, and can better attract the attention of the operator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of a specific area; Figure 3 This is a schematic diagram of the locking nut structure; As shown in the figure: 1. Locking sleeve, 2. Outer piston, 3. Inner piston, 4. Locking nut, 5. Locking screw, 6. Shock wave receiving rod, 7. High-pressure air chamber, 8. Buffer pad, 9. Sleeve body, 10. Cover body, 11. Sleeve tube, 12. Safety bolt, 13. Steel ball, 14. Insertion hole. 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 diagram illustrates a locking assembly for a safety-enhanced explosion-proof device, comprising an outer piston 2 and a locking sleeve 1 fitted onto the front end of the outer piston. A locking nut 4 is fixedly mounted on the outer piston, and a locking screw 5 is threadedly connected to the inner hole of the locking nut. The locking screw 5 extends forward and is threadedly connected to the locking sleeve. The locking screw can be a rod-type or tubular structure. The inner hole of the locking nut is centered, and the outer piston, locking sleeve, locking nut, and locking screw are coaxially arranged. After the explosion-proof device is installed, the locking screw extends laterally.

[0020] In this embodiment, the locking nut 4 is located in the inner hole of the outer piston 2 and is threadedly connected to the outer piston. To facilitate the tightening of the locking nut, at least one insertion hole 14 is provided on one side of the inner hole of the locking nut, and the insertion hole 14 extends forward to the front end face of the locking nut. In this embodiment, there is one insertion hole, located on one side of the central hole along the radial direction. When it is necessary to rotate the locking nut, the two posts of the tool are inserted into the central hole and the insertion hole of the locking nut respectively, which facilitates the rotation of the locking nut. There can be two or more insertion holes, and the insertion holes are spaced apart circumferentially.

[0021] A buffer pad 8 is fixed at the rear end of the locking nut. After the steel ball 13 loses its restraint on the inner piston 3, the inner piston moves forward under the action of high pressure gas in the high pressure chamber 7. By setting the buffer pad, the impact of the inner piston on the locking nut is buffered.

[0022] To facilitate connection with the shock wave receiving rod, in this embodiment, the locking screw 5 extends forward to form a locking sleeve 1, and one end of the locking screw extending forward to form the locking sleeve is fixedly connected to the shock wave receiving rod 6 of the explosion-proof device. Specifically, the front end of the locking screw is provided with an internal threaded hole, through which the locking screw is fixedly connected to the shock wave receiving rod of the explosion-proof device.

[0023] The locking sleeve includes a sleeve body 9 that is closed in the circumferential direction and a cover body 10 fixed to the front end of the sleeve body. The cover body 10 has a through hole that runs through in the front-back direction. A sleeve 11 that extends in the front-back direction is fixed to the through hole. The inner hole of the sleeve is provided with a thread that is adapted to the locking screw 5, that is, the locking screw and the sleeve of the locking sleeve are threadedly connected.

[0024] To further enhance the reliability of the locking sleeve in the non-working state, a safety bolt 12 is threadedly connected to the side wall of the locking sleeve, which extends radially to the outer piston. A back-tightening nut is threadedly connected to the safety bolt 12. The back-tightening nut reduces the loosening of the safety bolt and works simultaneously with the locking screw to form a double fixing structure.

[0025] The outer piston 2, inner piston 3, high-pressure air chamber 7, steel ball 13, and shock wave receiving rod mentioned in this embodiment are all common existing structures and will not be described in detail here.

[0026] After using the solution of this embodiment, during the transportation or installation of the explosion-proof device, the locking sleeve restricts the radial displacement of the steel ball 13, thereby restricting the axial displacement of the inner piston. The safety bolt 12 on the locking sleeve tightens against the outer piston, forming a first layer of fixation for the locking sleeve. The locking screw is simultaneously threadedly connected to both the locking sleeve and the locking nut, with the locking nut fixed within the outer piston, thus forming a second layer of fixation for the locking sleeve, preventing movement of the locking sleeve in the absence of an explosion. After the explosion-proof device is installed in the roadway, the locking screw is unscrewed from the locking nut, but remains threadedly connected to the locking sleeve, ensuring that the thrust of the shock wave receiving rod is transmitted to the locking sleeve. This ensures that after an explosion, the locking sleeve can move promptly to release the steel ball, thereby guaranteeing the reliability of the extinguishing powder spray.

[0027] 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-enhanced explosion-proof device locking assembly, comprising an outer piston (2) and a locking sleeve (1) sleeved on the front end of the outer piston, characterized in that: A locking nut (4) is fixed on the outer piston. A locking screw (5) is threadedly connected to the inner hole of the locking nut. The locking screw (5) extends forward and is threadedly connected to the locking sleeve.

2. The locking assembly of a safety-enhanced explosion-proof device according to claim 1, characterized in that: The locking nut (4) is located in the inner hole of the outer piston (2) and is connected to the outer piston by a thread.

3. The locking assembly of a safety-enhanced explosion-proof device according to claim 2, characterized in that: The locking nut has at least one insertion hole (14) on one side of its inner hole, and the insertion hole (14) extends forward to the front end face of the locking nut.

4. The locking assembly of a safety-enhanced explosion-proof device according to claim 2, characterized in that: A buffer pad (8) is fixed at the rear end of the locking nut.

5. The locking assembly of a safety-enhanced explosion-proof device according to claim 1, characterized in that: The locking screw (5) extends forward out of the locking sleeve (1), and one end of the locking screw extending forward out of the locking sleeve is fixedly connected to the shock wave receiving rod (6) of the explosion-proof device.

6. A safety-enhanced explosion-proof device locking assembly according to claim 5, characterized in that: The front end of the locking screw is provided with an internal threaded hole, and the locking screw is fixedly connected to the shock wave receiving rod of the explosion-proof device through the internal threaded hole.

7. The locking assembly of a safety-enhanced explosion-proof device according to claim 1, characterized in that: The locking sleeve includes a sleeve body (9) that is closed in the circumferential direction and a cover body (10) fixed to the front end of the sleeve body. The cover body (10) has a through hole that runs through the front and back direction. A sleeve (11) that extends in the front and back direction is fixed to the through hole. The inner hole of the sleeve is provided with a thread that is compatible with the locking screw (5).

8. A safety-enhanced explosion-proof device locking assembly according to claim 1, characterized in that: The sidewall of the locking sleeve is connected by a safety bolt (12) that extends radially to the outer piston, and a back-tightening nut is connected to the safety bolt (12) by a thread.

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