Coal mine underground explosive-proof device

Abstract

The invention relates to the technical field of coal mine underground explosion suppression, in particular to a coal mine underground explosion suppression device which comprises a base plate used for being connected with the top of a roadway, and a first mounting rod and a second mounting rod are arranged on the two sides of the base plate respectively. The two groups of explosive-proof device bodies are symmetrically distributed below the base plate, the ejection ports of the two groups of explosive-proof device bodies face oppositely, each group of explosive-proof device body is rotationally mounted on the first mounting rod, and trigger rods are arranged at the ends, away from each other, of the two groups of explosive-proof device bodies; the support frame is supported and mounted below the middle part of the substrate; and the suspension frame is fixedly mounted below the base plate and is used for releasing the supporting frame downwards when explosion occurs, so that the ends, close to each other, of the two groups of explosion-proof device bodies move downwards. According to the explosion-proof device, the suspension frame and the supporting frame are arranged above the two explosion-proof device bodies, the two explosion-proof device bodies can be rapidly driven to adjust the spraying angle, and overhauling operation of the triggering structure of the explosion-proof device bodies is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of underground explosion-proofing in coal mines, and in particular to an underground explosion-proofing device in coal mines. Background Art

[0002] Explosion-proofing in coal mines is an important means to cut off the spread of explosion flames. Commonly used explosion-proof devices receive the impact force of the explosion shock wave through a shock wave receiving part, and use the force transmitted by the shock wave receiving part to trigger the trigger mechanism. After triggering, the high-pressure gas in the high-pressure gas cavity sprays out the fire extinguishing powder in the powder storage cover to achieve explosion-proofing. For example, the application number is 2019101035195, and the name is a patent scheme for automatic two-way explosion-proof equipment and use method in coal mines; However, during use of this direct triggering method, since the rod of the shock wave receiving part and the container for storing the fire extinguishing powder are on the same axis, it is not convenient to detect the sliding ability of the rod of the shock wave receiving part during daily maintenance and inspection, and it is easy to trigger the container for storing the fire extinguishing powder when the rod of the shock wave receiving part slides. Summary of the invention

[0003] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides an underground explosion-proof device for coal mines, which can effectively solve the problem in the prior art that since the rod of the shock wave receiving part and the container for storing the fire extinguishing powder are on the same axis, the sliding ability of the rod of the shock wave receiving part cannot be conveniently detected during daily maintenance and inspection, and the container for storing the fire extinguishing powder is easily triggered when the rod of the shock wave receiving part slides.

[0004] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides an underground explosion-proof device for a coal mine, comprising a base plate for connecting with the top of a tunnel, and a first mounting rod and a second mounting rod are respectively arranged on both sides; Two groups of flameproof device bodies are symmetrically distributed below the base plate, the spray outlets of the two groups of flameproof device bodies face each other, each group of flameproof device bodies is rotatably mounted on the first mounting rod, and the ends of the two groups of flameproof device bodies that are away from each other are both provided with a trigger rod for triggering the spraying of flameproof dust, and the trigger rod is used to trigger the flameproof device body when the flameproof device body rotates; A support frame is installed below the middle of the base plate and is used to support the ends of the two sets of explosion-proof device bodies that are close to each other; The suspension is fixedly installed below the base plate and is used to release the support frame downward when an explosion occurs, so that the ends of the two sets of flameproof device bodies that are close to each other move downward.

[0005] Furthermore, receiving rods are slidably installed on both sides of the substrate, and receiving discs that receive shock waves and drive the receiving rods to slide under the substrate are fixedly installed at one end of the two receiving rods that are away from each other, and a push rod is provided at the other end of the receiving rod to release the support frame on the suspension downward.

[0006] Furthermore, the support frame includes a support rod horizontally arranged above the two groups of explosion-proof device bodies, and connecting rods are rotatably installed at both ends of the support rod, and the other end of the connecting rod is rotatably connected to the explosion-proof device body. A support shaft is rotatably and slidably installed above the middle part of the support frame, and the support shaft is used to be supported on the suspension.

[0007] Furthermore, the side view projection contour of the suspension is U-shaped, and a raised portion for supporting the middle portion of the support frame is provided in the middle portion of the suspension, an arc-shaped groove for accommodating the support shaft is provided in the middle portion of the raised portion, and sunken grooves are formed on both sides of the raised portion, and the sunken grooves are used to support the support shaft when the support shaft moves downward.

[0008] Furthermore, an arc plate is fixedly installed at one end of the two push rods away from the receiving rod, and the end surface of the arc plate away from the push rod is tightly attached to the outer peripheral surface of the support shaft. When the push rod moves toward the support shaft, it drives the support shaft to slide from the arc groove to the sinking groove.

[0009] Furthermore, a locking ring is fixedly welded to one end of the two groups of explosion-proof device bodies that are away from each other, and another locking ring is also fixedly welded to the outside of the trigger rod. When the two groups of explosion-proof device bodies are not in working state, the two locking rings are connected and fixed to each other by bolts.

[0010] Furthermore, a strip-shaped limit hole is provided on the side of the second mounting rod, and the strip-shaped limit holes are distributed up and down. A limit shaft is fixedly installed on the outer side of the trigger rod, and the limit shaft passes through the strip-shaped limit hole. In the installed state, the central axis of the limit shaft and the central axis of the rotational connection between the first mounting rod and the explosion-proof device body are located at the same horizontal height.

[0011] Furthermore, a limit frame is sleeved on the outer side of the second mounting rod, and a limit groove is arranged on the side of the limit frame, and the limit groove is used to limit the position of the limit axis inside the strip-shaped limit hole. A telescopic rod is fixedly installed on the second mounting rod, and the telescopic rod is used to drive the limit frame to move up and down.

[0012] Beneficial Effects Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects: 1. The present invention distributes the flameproof device body and the receiving rod for triggering the flameproof device body up and down, and arranges a suspension and a support frame above the two flameproof device bodies. During the triggering process, on the one hand, the two flameproof device bodies can be quickly driven to adjust the spraying angle so that the flameproof dust sprayed from the two flameproof device bodies can quickly fill the entire tunnel. On the other hand, the rotation of the flameproof device body can conveniently drive the trigger rod at the tail of the flameproof device body to generate displacement between the flameproof device body and the flameproof device body, thereby triggering the flameproof device body, which is more convenient for the maintenance operation of the triggering structure of the flameproof device body.

[0013] 2. In the present invention, in order to enable the support shaft to move downward quickly when an explosion occurs, a raised portion is provided in the middle of the suspension for supporting the support shaft under normal conditions. At the same time, sunken grooves for accommodating the downward sliding of the support shaft are formed on both sides of the raised portion. On the one hand, the support shaft can be stably supported under normal conditions. On the other hand, when an explosion occurs, the support shaft can be easily pushed into the sunken groove by pushing the support shaft to one side, thereby quickly triggering the explosion-proof device body.

[0014] 3. In the present invention, during the maintenance phase, the trigger rod, the second mounting rod and the limit frame are used in combination to conveniently lock the explosion-proof device body, which can make daily maintenance of the explosion-proof device body more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a side view of the present invention; Figure 3 It is a side view of the present invention in a triggered state; Figure 4 It is a schematic diagram of the installation structure of the support frame of the present invention; Figure 5 It is an exploded view of the coordinated installation of the support frame and the suspension frame of the present invention; Figure 6 It is a schematic diagram of the rear structure of the explosion-proof device body in a locked state of the present invention; Figure 7 It is a schematic diagram of the tail structure of the explosion-proof device body in a loosened state of the present invention; Figure 8 It is an exploded view of the installation of the second installation rod and the limiting frame of the present invention.

[0017] The numbers in the figure represent: 1. Base plate; 11. First mounting rod; 12. Second mounting rod; 1201. Strip-shaped limiting hole; 1202. Limiting groove; 121. Limiting frame; 122. Telescopic rod; 13. Suspension; 131. Protrusion; 1301. Sinking groove; 1302. Arc groove; 2. Receiving rod; 21. Push rod; 211. Arc plate; 3. Flameproof device body; 31. Trigger rod; 311. Limiting shaft; 32. Locking ring; 4. Support frame; 41. Support rod; 411. Connecting rod; 42. Support shaft. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] Embodiment: A coal mine underground explosion-proof device, such as Figure 1 - Figure 3 As shown, it includes a base plate 1 for connecting with the top of the tunnel, and a first mounting rod 11 and a second mounting rod 12 are respectively arranged on both sides; Two groups of flameproof device bodies 3 are symmetrically distributed below the base plate 1. The spray ports of the two groups of flameproof device bodies 3 face each other. Each group of flameproof device bodies 3 is rotatably mounted on the first mounting rod 11. The ends of the two groups of flameproof device bodies 3 that are away from each other are both provided with a trigger rod 31 for triggering the spraying of flameproof dust. The trigger rod 31 is used to trigger the flameproof device body when the flameproof device body 3 rotates. A support frame 4 is supported and installed below the middle of the base plate 1, and is used to support the ends of the two groups of flameproof device bodies 3 that are close to each other; The suspension 13 is fixedly installed below the base plate 1 and is used to release the support frame 4 downward when an explosion occurs, so that the ends of the two groups of flameproof device bodies 3 that are close to each other move downward.

[0021] In the present invention, two explosion-proof device bodies 3 are symmetrically installed below the substrate 1. When an explosion occurs inside the tunnel, the suspension 13 releases the support frame 4 downward, so that the ends of the two explosion-proof device bodies 3 facing each other move downward, and the two explosion-proof device bodies 3 and the first installation rod 11 rotate. When the explosion-proof device bodies 3 rotate, the trigger rod 31 is driven to rotate, so that the trigger rod 31 triggers the explosion-proof device bodies 3. At this time, the ends of the two explosion-proof device bodies 3 facing each other are adjusted to a more downward state, which can more quickly allow explosion-proof dust (commonly used dust includes limestone powder (CaCO3), ammonium phosphate powder or diatomaceous earth) to spread rapidly inside the tunnel; no matter which direction the shock wave is generated, it will drive the ends of the two explosion-proof device bodies 3 facing each other to move downward, and both explosion-proof device bodies 3 can be triggered, so as to isolate the explosion more thoroughly.

[0022] It should be noted that the structure of the explosion-proof device body 3 is the same as the conventional structure, and both drive the trigger rod 31 at the tail to move axially, so that the trigger rod 31 loosens the seal on the high-pressure storage tank, allowing the gas in the high-pressure storage tank (a compressed nitrogen tank (pressure 20~30MPa) or a small blasting device can be used to spray out dust at high speed within 5~50ms after triggering) to quickly leak to the funnel-shaped cover plate of the partition device body 3, driving the explosion-proof dust inside the cover plate to be sprayed out from the outlet of the cover plate.

[0023] Furthermore, receiving rods 2 are slidably installed on both sides of the substrate 1, and the ends of the two receiving rods 2 that are away from each other are fixedly installed with receiving disks that receive shock waves and drive the receiving rods 2 to slide under the substrate 1, and the other end of the receiving rod 2 is provided with a push rod 21 for releasing the support frame 4 on the suspension 13 downward.

[0024] Among them, by arranging a receiving rod 2 under the substrate 1, when an explosion occurs, a shock wave will be generated at the front end of the explosion, and this shock wave will drive the receiving disc to move in the opposite direction of the explosion. At this time, the receiving rod 2 will move under the drive of the receiving disc, and the push rod 21 at the other end of the receiving rod 2 will push the support frame 4 to a lower position. At this time, the injection end of the explosion-proof device body 3 can be driven to move downward for a distance. When the explosion-proof device body 3 rotates, it will drive the trigger rod 31 to rotate, so that the trigger rod 31 triggers the explosion-proof device body 3.

[0025] Further, refer to Figure 4 and Figure 5The support frame 4 includes a support rod 41 horizontally arranged above the two groups of explosion-proof device bodies 3, and connecting rods 411 are rotatably installed at both ends of the support rod 41. The other end of the connecting rod 41 is rotatably connected to the explosion-proof device body 3. A support shaft 42 is rotatably and slidably installed above the middle part of the support frame 4 (vertical rods are rotatably arranged on both sides of the support shaft 42, and the lower part of the vertical rod is horizontally slidably connected to the support frame 4), and the support shaft 42 is used to be supported on the suspension 13.

[0026] Among them, by arranging a support rod 41 above the two explosion-proof device bodies 3, and arranging connecting rods 411 at both ends of the support rod 41 to be connected to the two explosion-proof device bodies 3 respectively, and at the same time, rotating and slidingly installing a support shaft 42 above the middle part of the support frame 4, when it is necessary to trigger the explosion-proof device body 3, the support shaft 42 slides to a position below the suspension 13, which can conveniently drive one end of the two explosion-proof device bodies 3 to move downward, so that the two explosion-proof device bodies 3 are deflected, and then the explosion-proof device body 3 is triggered.

[0027] Further, refer to Figure 5 The side view projection profile of the suspension 13 is U-shaped, and a raised portion 131 for supporting the middle portion of the support frame 4 is provided in the middle of the suspension 13, and an arc groove 1302 for accommodating the support shaft 42 is provided in the middle of the raised portion 131, and sinking grooves 1301 are formed on both sides of the raised portion 131, and the sinking grooves 1301 are used to support the support shaft 42 when the support shaft 42 moves downward.

[0028] In order to make the support shaft 42 move downward quickly when an explosion occurs, a protrusion 131 is set in the middle of the suspension 13 for supporting the support shaft 42 under normal conditions. At the same time, sinking grooves 1301 for accommodating the support shaft 42 to slide downward are formed on both sides of the protrusion 131. On the one hand, under normal conditions, the support shaft 42 can be stably supported. On the other hand, when an explosion occurs, the support shaft 42 can be easily pushed to one side to push it into the sinking groove 1301, so that the explosion-proof device body 3 can be quickly triggered.

[0029] Further, refer to Figure 5 The two push rods 21 are fixedly installed with an arc plate 211 at one end away from the receiving rod 2. The end surface of the arc plate 211 away from the push rod 21 is tightly attached to the outer peripheral surface of the support shaft 42. When the push rod 21 moves toward the support shaft 42, it drives the support shaft 42 to slide from the arc groove 1302 to the sinking groove 1301.

[0030] In order to quickly push the support shaft 42 to the sinking groove 1301 when an explosion occurs, a receiving rod 2 is respectively arranged on both sides of the support shaft 42, and a push rod 21 is arranged at the end of the receiving rod 2. At the same time, in order to make the push rod 21 and the support shaft 42 more stably contact, an arc plate 211 is arranged at the end of the push rod 21.

[0031] Further, refer to Figure 6 and Figure 7 A locking ring 32 is fixedly welded to one end of the two groups of explosion-proof device bodies 3 that are away from each other, and another locking ring 32 is also fixedly welded to the outside of the trigger rod 31. When the two groups of explosion-proof device bodies 3 are in a non-working state, the two locking rings 32 are connected and fixed to each other by bolts.

[0032] Among them, by setting a locking ring 32 on the explosion-proof device body 3 and setting another locking ring 32 on the trigger rod 31, when the explosion-proof device body 3 is transported, the two locking rings 32 are connected to each other by bolts, which can prevent the explosion-proof device body 3 from being accidentally triggered. After the installation is completed, the bolts are removed.

[0033] Further, refer to Figure 6 and Figure 7 A strip-shaped limiting hole 1201 is provided on the side of the second mounting rod 12, and the strip-shaped limiting holes 1201 are distributed up and down. A limiting shaft 311 is fixedly installed on the outer side of the trigger rod 31, and the limiting shaft 311 passes through the strip-shaped limiting hole 1201. In the installed state, the central axis of the limiting shaft 311 and the central axis of the rotational connection between the first mounting rod 11 and the explosion-proof device body 3 are located at the same horizontal height.

[0034] Among them, by setting a strip limit hole 1201 on the second mounting rod 12, when the trigger rod 31 rotates following the explosion-proof device body 3 with the rotating shaft that rotates the explosion-proof device body 3 and the first mounting rod 11 as the axis, the limit shaft 311 on both sides of the trigger rod 31 moves in the direction away from the explosion-proof device body 3 under the guidance of the strip limit hole 1201, so that the valve mouth of the high-pressure gas tank inside the explosion-proof device body 3 can be opened, and then the high-pressure gas drives the explosion-proof dust to be sprayed out.

[0035] Further, refer to Figure 6 , Figure 7 and Figure 8 A limit frame 121 is sleeved on the outer side of the second mounting rod 12, and a limit groove 1202 is set on the side of the limit frame 121. The limit groove 1202 is used to limit the position of the limit axis 311 inside the strip limit hole 1201. A telescopic rod 122 is fixedly installed on the second mounting rod 12, and the telescopic rod 122 is used to drive the limit frame 121 to move up and down.

[0036] Among them, by arranging a limit frame 121 on the outer side of the second mounting rod 12, during the inspection and maintenance of the trigger device (whether the receiving rod 2 can normally drive the support shaft 42 to move downward from the protruding portion 131 of the suspension 13), the telescopic rod 122 can be driven to extend downward, which can drive the limit frame 121 to move downward, so that the limit groove 1202 on the limit frame 121 is against the position of the limit shaft 311, thereby avoiding the explosion-proof device body 3 from being triggered accidentally during the inspection and maintenance, and the explosion-proof device body 3 and its triggering structure can be maintained more conveniently during daily use.

[0037] Working principle: By distributing the explosion-proof device body 3 and the receiving rod 2 for triggering the explosion-proof device body 3 up and down, and arranging a suspension 13 and a support frame 4 above the two explosion-proof device bodies 3, during the triggering process, on the one hand, the two explosion-proof device bodies 3 can be quickly driven to adjust the spray angle, so that the explosion-proof dust sprayed from the two explosion-proof device bodies 3 quickly fills the entire tunnel (under normal conditions, in order to avoid affecting the transportation of construction vehicles or equipment in the tunnel, the overall height of the explosion-proof device body 3 is adjusted upward), on the other hand, the rotation of the explosion-proof device body 3 can conveniently drive the trigger rod 31 at the tail of the explosion-proof device body 3 to generate displacement with the explosion-proof device body 3, thereby triggering the explosion-proof device body 3. At the same time, during the maintenance stage, the coordinated use of the trigger rod 31, the second mounting rod 12 and the limit frame 121 can conveniently lock the explosion-proof device body 3, which can be more convenient for daily maintenance of the explosion-proof device body 3.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mine underground explosion-proof device, characterized in that: include: A base plate (1) is used to be connected to the top of the tunnel, and has a first mounting rod (11) and a second mounting rod (12) respectively disposed on both sides; Two groups of flameproof device bodies (3) are symmetrically distributed below the base plate (1); the spray outlets of the two groups of flameproof device bodies (3) face each other; each group of flameproof device bodies (3) is rotatably mounted on a first mounting rod (11); a trigger rod (31) for triggering the spraying of flameproof dust is disposed at one end of the two groups of flameproof device bodies (3) that is away from each other; the trigger rod (31) is used to trigger the flameproof device body when the flameproof device body (3) rotates; A support frame (4) is supported and installed below the middle of the base plate (1) and is used to support the ends of the two sets of flameproof device bodies (3) that are close to each other; The suspension (13) is fixedly mounted below the base plate (1) and is used to release the support frame (4) downward when an explosion occurs, so that the ends of the two sets of flameproof device bodies (3) that are close to each other move downward.

2. The underground explosion-proof device of a coal mine according to claim 1, characterized in that: Receiving rods (2) are slidably mounted on both sides of the base plate (1); receiving discs that receive shock waves and drive the receiving rods (2) to slide below the base plate (1) are fixedly mounted on the ends of the two receiving rods (2) that are away from each other; and push rods (21) are provided at the other ends of the receiving rods (2) for releasing the support frame (4) on the suspension (13) downward.

3. The underground explosion-proof device of coal mine according to claim 2, characterized in that: The support frame (4) comprises a support rod (41) horizontally arranged above the two groups of flameproof device bodies (3); connecting rods (411) are rotatably mounted at both ends of the support rod (41); the other end of the connecting rod (411) is rotatably connected to the flameproof device body (3); a support shaft (42) is rotatably and slidably mounted above the middle portion of the support frame (4); the support shaft (42) is used to be supported on the suspension frame (13).

4. The underground explosion-proof device of a coal mine according to claim 3, characterized in that: The side view projection profile of the suspension (13) is U-shaped, and a raised portion (131) for supporting the middle portion of the support frame (4) is provided in the middle of the suspension (13), and an arc-shaped groove (1302) for accommodating the support shaft (42) is provided in the middle of the raised portion (131), and sinking grooves (1301) are formed on both sides of the raised portion (131), and the sinking grooves (1301) are used to support the support shaft (42) when the support shaft (42) moves downward.

5. The underground explosion-proof device of coal mine according to claim 4, characterized in that: An arc plate (211) is fixedly mounted on one end of the two push rods (21) away from the receiving rod (2); the end surface of the arc plate (211) away from the push rod (21) is in close contact with the outer peripheral surface of the support shaft (42); when the push rod (21) moves toward the support shaft (42), it drives the support shaft (42) to slide from the arc groove (1302) to the sinking groove (1301).

6. The underground explosion-proof device of coal mine according to claim 5, characterized in that: A locking ring (32) is fixedly welded to one end of the two sets of flameproof device bodies (3) that are away from each other, and another locking ring (32) is also fixedly welded to the outside of the trigger rod (31). When the two sets of flameproof device bodies (3) are in a non-working state, the two locking rings (32) are connected and fixed to each other by bolts.

7. The underground explosion-proof device of coal mine according to claim 6, characterized in that: The side of the second mounting rod (12) is provided with a strip-shaped limiting hole (1201), the strip-shaped limiting holes (1201) are distributed up and down, and a limiting shaft (311) is fixedly mounted on the outer side of the trigger rod (31), the limiting shaft (311) passes through the strip-shaped limiting hole (1201), and in the installed state, the central axis of the limiting shaft (311) and the central axis of the rotational connection between the first mounting rod (11) and the flameproof device body (3) are located at the same horizontal height.

8. The underground explosion-proof device of coal mine according to claim 7, characterized in that: A limiting frame (121) is sleeved on the outer side of the second mounting rod (12), and a limiting groove (1202) is provided on the side of the limiting frame (121), and the limiting groove (1202) is used to limit the position of the limiting shaft (311) inside the strip-shaped limiting hole (1201). A telescopic rod (122) is fixedly mounted on the second mounting rod (12), and the telescopic rod (122) is used to drive the limiting frame (121) to move up and down.

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