An automatic explosion isolation device for underground coal mine

Abstract

This utility model discloses an automatic explosion-proof device for underground coal mines, including a transmission rod. A connecting rod is fixedly installed on the left side of the transmission rod, and receiving plates are fixedly installed at both ends of the left side of the connecting rod. Through the design of the guide sleeve, this utility model can form an effective support structure at both ends of the transmission rod, preventing the transmission rod from tilting or shifting due to force. Simultaneously, under the action of the guide balls, the transmission rod is supported internally by the guide sleeve, effectively reducing the frictional resistance between the transmission rod and the guide sleeve. Furthermore, through the design of the corrugated telescopic hose and the fixed cover, a good protective effect is formed between the guide sleeve and the transmission rod on both sides, effectively preventing a large amount of dust from adhering to the surface of the transmission rod around the guide sleeve. This prevents jamming between the transmission rod and the guide sleeve during subsequent triggering actions, ensuring the long-term stable operation of the entire system.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety equipment technology, specifically to an automatic explosion-proof device for underground coal mines. Background Technology

[0002] In coal mining, gas explosions pose a serious threat to the lives and safety of underground workers and production. Once a gas explosion occurs, the high-temperature flames and powerful shock waves generated by the explosion will spread rapidly in the roadway, causing serious casualties and equipment damage. It may even trigger a chain reaction, leading to a larger-scale disaster. Currently, automatic explosion-proof devices are commonly installed in coal mines to isolate the spread of coal dust and gas explosions and prevent chain explosions. The device uses a receiving plate and transmission rod assembly to trigger the action. The transmission rod needs to slide flexibly within the limited range of the support to ensure that when the explosion signal is triggered, it can quickly drive the explosion-proof component to spray the explosion-proof medium, forming a fire-extinguishing powder mist area to suppress the explosion flames, effectively block the spread of the explosion, and avoid more harmful continuous explosions.

[0003] However, during long-term use, existing automatic explosion-proof devices in coal mines are prone to dust entering the gap between the transmission rod and the support, which gradually accumulates and forms hard dirt. This increases the sliding resistance of the transmission rod and can even cause it to jam. Once the transmission rod jams, the device cannot be triggered normally when an explosion occurs, and the explosion-proof function fails, which will cause the explosion accident to expand and cause serious casualties and property damage. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic explosion-proof device for underground coal mines, which has an effective dustproof structure to prevent dust from entering and causing the transmission rod to jam, thus ensuring the normal operation of the whole system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic explosion-proof device for underground coal mines, comprising a transmission rod, a connecting rod fixedly installed on the left side of the transmission rod, receiving plates fixedly installed at both ends of the left side of the connecting rod, guide sleeves slidably connected to both ends of the transmission rod, guide balls embedded around both ends of the inner cavity of the guide sleeve, the surfaces of the guide balls slidably connected to the surface of the transmission rod, corrugated telescopic hoses fitted at both ends of the outer surface of the guide sleeve, a fixed cover fitted at the inner cavity of the corrugated telescopic hose away from the guide sleeve, the inner cavity of the fixed cover fitted onto the surface of the transmission rod, and the main body of the automatic explosion-proof device fixedly installed on the right side of the transmission rod.

[0006] As a preferred embodiment, the fixed cover is provided with air vents around its perimeter, and a rubber diaphragm is fixedly connected to the surface of the air vents, with a slit in the middle of the rubber diaphragm.

[0007] As a preferred embodiment, the cut is cross-shaped.

[0008] As a preferred embodiment, stainless steel hose clamps are fitted at both ends of the outer surface of the corrugated telescopic hose.

[0009] As a preferred embodiment, a support frame is fixedly connected to the middle of the top of the outer surface of the guide sleeve, and a mounting plate is fixedly connected to the top of the support frame. The mounting plate has mounting through holes on all four sides.

[0010] As a preferred embodiment, a mounting bracket is fixedly installed on the top of the main body of the automatic explosion-proof device, and mounting slots are provided at both ends of the top of the mounting bracket.

[0011] As a preferred embodiment, locking bolts are movably inserted on both sides of the fixing cover, and the surface of the locking bolts is threadedly connected to the surface of the transmission rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention, through the design of the guide sleeve, forms an effective support structure at both ends of the transmission rod, preventing the transmission rod from tilting or shifting due to force. Simultaneously, the guide balls provide corresponding support to the transmission rod inside the guide sleeve, effectively reducing the frictional resistance between the transmission rod and the guide sleeve. Furthermore, the corrugated telescopic hose and fixed cover provide excellent protection between the guide sleeve and the transmission rod on both sides, effectively preventing dust from accumulating on the surface of the transmission rod around the guide sleeve. This prevents jamming between the transmission rod and the guide sleeve during subsequent triggering actions, ensuring long-term stable operation of the entire system. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 This is a schematic diagram of the corrugated telescopic hose structure of this utility model;

[0016] Figure 3 This is a front cross-sectional view of the corrugated telescopic hose of this utility model;

[0017] Figure 4 This is a schematic diagram of the side structure of the fixed cover of this utility model.

[0018] In the diagram: 1. Main body of the automatic explosion-proof device; 2. Mounting frame; 3. Transmission rod; 4. Guide sleeve; 5. Support frame; 6. Mounting plate; 7. Connecting rod; 8. Receiving plate; 9. Corrugated telescopic hose; 10. Fixing cover; 11. Locking bolt; 12. Stainless steel hose clamp; 13. Guide ball; 14. Air vent; 15. Rubber diaphragm; 16. Cutout. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] The components of the automatic explosion-proof device of this application, including the main body 1, mounting frame 2, transmission rod 3, guide sleeve 4, support frame 5, mounting plate 6, connecting rod 7, receiving plate 8, corrugated telescopic hose 9, fixing cover 10, locking bolt 11, stainless steel hose clamp 12, guide ball 13, air vent 14, rubber diaphragm 15, and slit 16, are all general standard parts or parts known to those skilled in the art. Their structure and principle are common knowledge and can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0022] Example 1:

[0023] Please see Figures 1-4 As shown, this utility model provides an automatic explosion-proof device for underground coal mines, including a transmission rod 3. A connecting rod 7 is fixedly installed on the left side of the transmission rod 3. A receiving plate 8 is fixedly installed at both ends of the left side of the connecting rod 7. A guide sleeve 4 is slidably connected to both ends of the transmission rod 3. Guide balls 13 are embedded around both ends of the inner cavity of the guide sleeve 4. The surfaces of the guide balls 13 are slidably connected to the surface of the transmission rod 3. Corrugated telescopic hoses 9 are fitted at both ends of the outer surface of the guide sleeve 4. A fixing cover 10 is fitted at the inner cavity of the corrugated telescopic hose 9 away from the guide sleeve 4. The inner cavity of the fixing cover 10 is fitted onto the surface of the transmission rod 3. The main body 1 of the automatic explosion-proof device is fixedly installed on the right side of the transmission rod 3.

[0024] In this technical solution, the guide sleeve 4 forms an effective support structure at both ends of the transmission rod 3, preventing the transmission rod 3 from tilting or shifting due to force. Simultaneously, the guide ball bearing 13 provides support for the transmission rod 3 inside the guide sleeve 4, effectively reducing the frictional resistance between the transmission rod 3 and the guide sleeve 4. Furthermore, the corrugated telescopic hose 9 and the fixed cover 10 provide good protection between the guide sleeve 4 and the transmission rod 3 on both sides, effectively preventing dust from adhering to the surface of the transmission rod 3 around the guide sleeve 4. This prevents jamming between the transmission rod 3 and the guide sleeve 4 during subsequent triggering actions, ensuring long-term stable operation. During use, the impact of an underground coal mine explosion will momentarily push the receiving plate 8. Simultaneously, the receiving plate 8, via the connecting rod 7, will cause the transmission rod 3 to shift to the right along the inside of the guide sleeve 4. This displacement, triggered by the triggering mechanism at the left end of the automatic explosion-proof device body 1, will cause the automatic explosion-proof device body 1 to spray explosion-proof medium into the mine, forming a fire-extinguishing powder mist area to suppress the explosion flame, effectively blocking the propagation of the explosion and preventing more dangerous continuous explosions.

[0025] It should be noted that, firstly, lubricating oil is applied between the guide sleeve 4 and the guide ball 13; secondly, because there are two receiving plates 8, the ability to receive shock waves during an explosion is correspondingly improved.

[0026] Example 2:

[0027] Based on Embodiment 1, this utility model is as follows: Figure 4 As shown, the fixed cover 10 has air vents 14 around its perimeter. A rubber diaphragm 15 is fixedly connected to the surface of the air vents 14. A cut 16 is provided at the middle of the rubber diaphragm 15. The cut 16 is cross-shaped.

[0028] In this technical solution, through the setting of air guide hole 14, rubber diaphragm 15 and slit 16, when an explosion occurs in the coal mine and causes displacement of receiving plate 8, transmission rod 3 and fixed cover 10, the displacement of fixed cover 10 can compress the air inside corrugated telescopic hose 9. At the same time, under the action of air pressure, the cross-shaped slit 16 on rubber diaphragm 15 can be expanded, so that air can be quickly discharged through air guide hole 14, thereby reducing the resistance caused by air compression to the movement of transmission rod 3. When the displacement stops, the elasticity of rubber diaphragm 15 can cause slit 16 to close, thereby preventing dust from entering.

[0029] Example 3:

[0030] Based on Embodiment 1, this utility model is as follows: Figures 1-3As shown, stainless steel hose clamps 12 are fitted on both ends of the outer surface of the corrugated telescopic hose 9. A support frame 5 is fixedly connected to the middle of the top of the outer surface of the guide sleeve 4. A mounting plate 6 is fixedly connected to the top of the support frame 5. Mounting through holes are opened around the four sides of the mounting plate 6. A mounting bracket 2 is fixedly installed on the top of the main body 1 of the automatic explosion-proof device. Mounting through grooves are opened at both ends of the top of the mounting bracket 2. Locking bolts 11 are movably inserted on both sides of the fixed cover 10. The surface of the locking bolts 11 is threaded to the surface of the transmission rod 3.

[0031] In this technical solution, the stainless steel hose clamp 12 can lock and fix both ends of the corrugated telescopic hose 9 to the fixed cover 10 and the guide sleeve 4, preventing the corrugated telescopic hose 9 from loosening during use. The support frame 5, mounting plate 6 and mounting through hole facilitate the installation and fixing of the guide sleeve 4. The mounting frame 2 and mounting through groove facilitate the installation and fixing of the main body 1 of the automatic explosion-proof device. The locking bolt 11 achieves the purpose of fixing the fixed cover 10 and the transmission rod 3.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An automatic explosion-proof device for underground coal mines, comprising a transmission rod (3), characterized in that: A connecting rod (7) is fixedly installed on the left side of the transmission rod (3). A receiving plate (8) is fixedly installed at both ends of the left side of the connecting rod (7). A guide sleeve (4) is slidably connected to both ends of the transmission rod (3). Guide balls (13) are embedded around both ends of the inner cavity of the guide sleeve (4). The surface of the guide balls (13) is slidably connected to the surface of the transmission rod (3). Corrugated telescopic hoses (9) are sleeved at both ends of the outer surface of the guide sleeve (4). A fixing cover (10) is sleeved at the inner cavity of the corrugated telescopic hose (9) and at the end away from the guide sleeve (4). The inner cavity of the fixing cover (10) is sleeved on the surface of the transmission rod (3). An automatic explosion-proof device body (1) is fixedly installed on the right side of the transmission rod (3).

2. The automatic explosion-proof device for underground coal mines according to claim 1, characterized in that: The fixed cover (10) has air vents (14) around its perimeter. A rubber diaphragm (15) is fixedly connected to the surface of the air vents (14). A cut (16) is provided at the middle of the rubber diaphragm (15).

3. The automatic explosion-proof device for underground coal mines according to claim 2, characterized in that: The cut (16) is cross-shaped.

4. The automatic flame isolation device for underground coal mines according to claim 1, characterized in that: Stainless steel hose clamps (12) are fitted at both ends of the outer surface of the corrugated telescopic hose (9).

5. The automatic flame isolation device for underground coal mines according to claim 1, characterized in that: A support frame (5) is fixedly connected to the middle of the top of the outer surface of the guide sleeve (4), and a mounting plate (6) is fixedly connected to the top of the support frame (5). Mounting through holes are provided around the mounting plate (6).

6. The automatic explosion-proof device for underground coal mines according to claim 1, characterized in that: The top of the main body (1) of the automatic explosion-proof device is fixedly installed with a mounting bracket (2), and both ends of the top of the mounting bracket (2) are provided with mounting slots.

7. The automatic explosion-proof device for underground coal mines according to claim 1, characterized in that: Locking bolts (11) are movably inserted on both sides of the fixed cover (10), and the surface of the locking bolts (11) is threaded to the surface of the guide rod (3).

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