Fire preventing and extinguishing equipment for coal mine goaf

Abstract

The utility model discloses fire preventing and extinguishing equipment in a coal mine goaf, which relates to the field of power distribution cabinet equipment, and comprises a grouting steel pipe, a suspender connected between two adjacent hydraulic supports, and a connecting piece sleeved outside the suspender in a sliding manner, and the grouting steel pipe is connected with a nozzle at the front end of the grouting steel pipe and a grouting hose at the tail end of the grouting steel pipe. The bottom of the connecting piece is connected with the grouting steel pipe in a sliding and sleeved mode, one end of the connecting piece is further coaxially and fixedly connected with a locking sleeve, and the locking sleeve is connected to the outer portion of the grouting steel pipe in a sliding and sleeved mode and can be locked with the grouting steel pipe to keep relatively immovable. The locking sleeve can lock the grouting steel pipe at any position of the grouting steel pipe, so that adjustment of the spraying distance of the grouting steel pipe is not limited any more, and the adjusting range of the grouting steel pipe is greatly widened.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine fire prevention and control, in particular to a coal mine goaf area fire prevention and extinguishing device. Background Art

[0002] Comprehensively mechanized coal mining is the primary mining activity in coal mines. Each layer is mined by installing hydraulic supports at the cut-hole location and then continuously advancing the mining machine from the cut-hole. The goaf after coal seam mining typically collapses naturally. However, the roof and floor of this part of the coal seam are exposed, posing a potential safety risk of spontaneous combustion. Therefore, fire prevention and extinguishing measures are required in the goaf.

[0003] At present, the most practical and effective fire prevention and extinguishing treatment method is spraying fire prevention and extinguishing, that is, attaching the inhibitor to the top and bottom plates in the form of a spray, so as to achieve a fire prevention effect. The prior art discloses an application number 2018108766572, and the name is a coal mine goaf spraying fire prevention and extinguishing device. The device can adjust the maximum distance of the three nozzles spraying slurry forward and the area covered when swinging up and down by adjusting the position of the rotation connection between the support rod and a certain U-shaped support plate, that is, the forward extension and up and down swing amplitude of the three nozzles. Although the device can adjust the distance and coverage area of the sprayed slurry, it still lacks flexibility in adjusting the distance. If you want to meet the needs of more distance adjustments, you can only increase the number of U-shaped support plates, and each adjustment is relatively troublesome, and cannot meet the actual needs of the operation. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides a coal mine goaf fire prevention and extinguishing device.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal mine goaf fire prevention and extinguishing equipment, comprising a grouting steel pipe, the front end of the grouting steel pipe is connected to a nozzle, and the end is connected to a grouting hose, and also comprises a hanger connected between two adjacent hydraulic supports, the outside of the hanger is slidably sleeved with a connecting piece, the bottom of the connecting piece is slidably sleeved with the grouting steel pipe, and one end of the connecting piece is also coaxially fixedly connected with a locking sleeve, and the locking sleeve is also slidably sleeved on the outside of the grouting steel pipe and can be locked with it to keep it relatively motionless.

[0006] Preferably, the locking sleeve is clamped around the circumferential surface of the grouting steel pipe to form a lock.

[0007] Preferably, the locking sleeve includes a sliding sleeve that is slidably sleeved on the outside of the grouting steel pipe, and the end of the sliding sleeve facing away from the connecting piece is fixedly connected to a plurality of arc-shaped clamping plates, and the plurality of arc-shaped clamping plates are evenly distributed in a ring shape, and all the arc-shaped clamping plates extend along the axial direction of the sliding sleeve at one end facing away from the sliding sleeve, and gradually extend along its radial direction to form a tapered structure. The external thread of the sliding sleeve is sleeved with an external bolt, and by driving the external bolt to rotate and move toward the arc-shaped clamping plate, all the arc-shaped clamping plates are gradually deformed inwardly;

[0008] The inner side of the end of each arc-shaped clamping plate is integrally formed with a protrusion along the extending direction of the arc length.

[0009] Preferably, limiting ribs are formed on the inner wall of the sleeve protruding radially inward, and the limiting ribs are distributed along the axial direction of the sleeve. A limiting guide groove adapted to the limiting ribs is formed on the outer circumferential surface of the grouting steel pipe, and the limiting ribs are nested in the limiting guide groove to maintain a sliding fit connection therewith.

[0010] Preferably, the connecting member includes a first sleeve, a connecting pipe and a second sleeve, wherein the first sleeve is slidably sleeved on the outside of the hanger, the second sleeve is slidably sleeved on the outside of the grouting steel pipe, the second sleeve is fixedly connected to the sliding sleeve, one end of the connecting pipe is rotatably connected to the first sleeve, and the other end is fixedly connected to the second sleeve.

[0011] Preferably, the nozzle is connected to the grouting steel pipe in a ball joint manner, and a cylinder is hingedly installed on the outer circumference of the grouting steel pipe, and the cylinder and the limiting guide groove are located on the same straight line.

[0012] Preferably, an upper limiting ring and a lower limiting ring are fixedly installed on the circumferential surface of the grouting steel pipe at positions at both ends of the limiting guide groove.

[0013] Preferably, telescopic sub-rods are slidably sleeved inside both ends of the boom along their axial directions, and the ends of the two telescopic sub-rods are hinged to the hydraulic support in the horizontal direction;

[0014] Both ends of the suspension rod are also extended outward in the radial direction to form a limit baffle.

[0015] Compared with the existing technology, the utility model provides a coal mine goaf fire prevention and extinguishing equipment, which has the following beneficial effects:

[0016] (1) The locking sleeve in the utility model can lock the grouting steel pipe at any position, so that the adjustment of the injection distance of the grouting steel pipe is no longer limited, and its adjustment range is greatly improved. Moreover, the entire adjustment operation is very convenient. The grouting steel pipe is directly pulled to the appropriate length, and then the grouting steel pipe can be fixed by rotating the outer bolt.

[0017] (2) In addition, the second sleeve in the connecting piece is slidably connected to the outside of the grouting steel pipe. One end of the connecting pipe is rotatably connected to the first sleeve, and the other end is fixedly connected to the second sleeve. The first sleeve can not only slide on the hanger, but also rotate relative to the hanger. Under the action of this structure, the entire grouting steel pipe can be adjusted in multiple dimensions at the same time, thereby effectively improving its flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a structural diagram of the entire device in the embodiment in working state;

[0020] Figure 2 A schematic diagram of the entire device in an idle state in an embodiment;

[0021] Figure 3 Schematic diagram of the assembly of the connecting member on the boom in the embodiment;

[0022] Figure 4 This is a schematic diagram of the assembly of the locking sleeve on the grouting steel pipe in the embodiment;

[0023] Figure 5 Schematic diagram of the overall structure of the locking sleeve in the embodiment;

[0024] Figure 6 Schematic cross-section of the locking sleeve in the embodiment.

[0025] In the figure: 1. Grouting steel pipe; 2. Grouting hose; 3. Nozzle; 4. Hanging rod; 5. Connector; 6. Locking sleeve; 7. Cylinder; 8. Telescopic rod; 9. Limit baffle; 10. First sleeve; 11. Connecting pipe; 12. Second sleeve; 13. Upper limit ring; 14. Lower limit ring; 15. Limit guide groove; 16. Sliding sleeve; 17. External bolt; 18. Arc clamping plate; 19. Limit rib; 20. Protrusion. DETAILED DESCRIPTION

[0026] The technical solutions 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 only a part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0027] This embodiment proposes a coal mine goaf fire prevention and extinguishing equipment, such as Figures 1 to 6 As shown, it includes a grouting steel pipe 1, the front end of the grouting steel pipe 1 is connected to a nozzle 3, and the end is connected to a grouting hose 2. The grouting hose 2 is connected to an external inhibitor storage tank, and the inhibitor inside the storage tank is pumped into the grouting hose 2 by a pressure pump. The inhibitor passes through the grouting hose 2 and the grouting steel pipe 1 in turn and is sprayed out from the nozzle 3. Finally, the inhibitor adheres to the top plate and the bottom plate to form a water-containing liquid film, thereby isolating the coal body from contact with oxygen and preventing the oxidation process of the coal. As for the installation of the grouting steel pipe 1, this embodiment chooses to install it between every two adjacent hydraulic supports. The two adjacent hydraulic supports are equipped with a boom 4. The outside of the boom 4 is slidably sleeved with a connector 5. The bottom of the connector 5 is slidably sleeved with the grouting steel pipe 1. One end of the connector 5 is also coaxially fixedly connected with a locking sleeve 6. The locking sleeve 6 is also slidably sleeved on the outside of the grouting steel pipe 1 and can be locked with it to remain relatively motionless. Since the entire grouting steel pipe 1 rotates with the connector 5 as the center, when it is necessary to adjust the spraying distance of the nozzle 3, it is necessary to change the distance between the nozzle 3 and the connector 5. The farther the distance between the nozzle 3 and the connector 5 is, the farther the spraying distance of the nozzle 3 is. The locking sleeve 6 can be locked on the grouting steel pipe 1 at any time, so the adjustable distance of the nozzle 3 is very flexible.

[0028] In the above scheme, the locking sleeve 6 is clamped around the circumferential surface of the grouting steel pipe 1 to form a locking structure. This locking method allows the locking sleeve 6 and the grouting steel pipe 1 to have a large contact area, ensuring the reliability of the clamping. Specifically, the locking sleeve 6 in this embodiment includes a sliding sleeve 16 that is slidably connected to the outside of the grouting steel pipe 1. The end of the sliding sleeve 16 facing away from the connecting member 5 is fixedly connected to a plurality of arc-shaped clamping plates 18. The plurality of arc-shaped clamping plates 18 are evenly distributed in an annular shape, and all of the arc-shaped clamping plates 18 extend axially along the sliding sleeve 16 at the end facing away from the sliding sleeve 16 while gradually extending radially to form a tapered structure. The external thread of the sliding sleeve 16 is sleeved with an external bolt 17. By driving the external bolt 17 to rotate and move toward the arc-shaped clamping plates 18, all of the arc-shaped clamping plates 18 gradually deform inward. The inner side of the end of each arc-shaped clamping plate 18 is integrally connected with a protrusion 20 along the direction of its arc length. The outer bolt 17 is initially located at Figure 5 The position shown in the figure, at this time the sliding sleeve 16 can slide normally relative to the grouting steel pipe 1. When it is necessary to adjust the spraying distance of the nozzle 3, the personnel directly pulls the grouting steel pipe 1 to slide relative to the connecting piece 5. After the grouting steel pipe 1 slides to the target position, the outer bolt 17 is turned. During the rotation process, the outer bolt 17 slides toward the arc-shaped clamping plate 18 through the action of the threaded structure, thereby causing the arc-shaped clamping plate 18 to deform radially inward. Finally, the protrusion 20 on the inner side of the arc-shaped clamping plate 18 first contacts the grouting steel pipe 1 to form a hold on it.

[0029] In the above scheme, when the outer bolt 17 is driven to rotate, since the sleeve 16 can also rotate relative to the grouting steel pipe 1, it is necessary to use external force to keep the sleeve 16 stationary, otherwise it will be very difficult to drive the outer bolt 17 to rotate. In view of this, in this embodiment, a limiting rib 19 is formed on the inner wall of the sleeve 16 along the radial inward protrusion. The limiting rib 19 is distributed along the axial direction of the sleeve 16, and a limiting guide groove 15 is formed on the outer circumferential surface of the grouting steel pipe 1 to match the limiting rib 19. The limiting rib 19 is nested in the limiting guide groove 15 to maintain a sliding connection therewith. Through the cooperation of the limiting rib 19 and the limiting guide groove 15, the sleeve 16 and the grouting steel pipe 1 can be locked in the circumferential direction. The sleeve 16 can only move axially relative to the grouting steel pipe 1. When locking the grouting steel pipe 1, the operator only needs to twist the outer bolt 17 with a wrench.

[0030] As a preferred embodiment, the connector 5 in this embodiment includes a first sleeve 10, a connecting pipe 11 and a second sleeve 12, wherein the first sleeve 10 is slidably sleeved on the outside of the hanger 4, the second sleeve 12 is slidably sleeved on the outside of the grouting steel pipe 1, the second sleeve 12 is fixedly connected to the sliding sleeve 16, one end of the connecting pipe 11 is rotatably connected to the first sleeve 10, and the other end is fixedly connected to the second sleeve 12. The first sleeve 10 can slide along its length on the hanger 4, thereby increasing the spray range of the nozzle 3 in the horizontal direction, and the grouting steel pipe 1 can slide relative to the second sleeve 12, thereby controlling the extension length of the grouting steel pipe 1 and changing its spray distance, and the relative rotation of the connecting pipe 11 and the first sleeve 10 can cause the grouting steel pipe 1 to rotate around the first sleeve 10. Through the above structure, the entire grouting steel pipe 1 can be adjusted in multiple dimensions at the same time, thereby effectively improving its flexibility.

[0031] Furthermore, in order to further improve the flexibility and ease of operation of the nozzle 3, this embodiment chooses to connect the adjustable nozzle 3 to the grouting steel pipe 1 in a ball joint manner, and a cylinder 7 is hingedly installed on the outer circumference of the grouting steel pipe 1, and the cylinder 7 is located on the same straight line as the limiting guide groove 15. The spraying angle of the nozzle 3 can be changed by rotating the grouting steel pipe 1, but after all, personnel are still needed to operate the grouting steel pipe 1. By driving the nozzle 3 to rotate by the cylinder 7, the trouble of personnel operating the grouting steel pipe 1 can be reduced. The personnel directly hold the grouting steel pipe 1 still and control the spraying angle of the nozzle 3 by the cylinder 7.

[0032] In addition, since both the connector 5 and the locking sleeve 6 slide relative to the grouting steel pipe 1, in order to prevent them from slipping off the grouting steel pipe 1, this embodiment further fixes an upper limit ring 13 and a lower limit ring 14 on the circumferential surface of the grouting steel pipe 1 at the two ends of the limit guide groove 15. The upper limit ring 13 and the lower limit ring 14 limit the two. When the grouting steel pipe 1 is in an idle state, the entire grouting steel pipe 1 is set in an upright state (the bottom of the grouting steel pipe 1 can be tied to the hydraulic support with wire) to prevent it from affecting the personnel working under the hydraulic support. At this time, the upper limit ring 13 is stuck above the second sleeve 12 to ensure that the grouting steel pipe 1 will not slip off. Similarly, since the first sleeve 10 slides on the hanger 4, in order to prevent the first sleeve 10 from slipping off the hanger 4, this embodiment further extends radially outward at both ends of the hanger 4 to form a limit baffle 9 integrally formed thereon, and the limit baffle 9 limits the sliding of the first sleeve 10.

[0033] During the coal mining operation, as the coal mining machine continuously cuts the coal seam, the hydraulic support also needs to be continuously pushed forward. When the hydraulic supports are pushed forward one by one, the two adjacent hydraulic supports are bound to move relative to each other. Therefore, the two ends of the boom 4 cannot maintain a rigid and fixed connection with the hydraulic support, but a flexible connection is adopted. Based on this consideration, in this embodiment, telescopic sub-rods 8 are slidably sleeved along the axial direction inside the two ends of the boom 4. The ends of the two telescopic sub-rods 8 are hinged to the hydraulic supports in the horizontal direction. When one of the hydraulic supports moves forward, the telescopic sub-rod 8 extends from the boom 4 to cooperate with the movement of the hydraulic support.

[0034] In the description of this utility model, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this utility model, "plurality" means two or more, unless otherwise specifically specified.

[0035] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. In addition, in the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fire prevention and extinguishing device for coal mine goaf, comprising a grouting steel pipe (1), the front end of the grouting steel pipe (1) being connected to a nozzle (3), and the end of the grouting steel pipe (1) being connected to a grouting hose (2), characterized in that: It also includes a suspension rod (4) connected between two adjacent hydraulic supports, the outside of the suspension rod (4) is slidably sleeved with a connecting piece (5), the bottom of the connecting piece (5) is slidably sleeved and connected to the grouting steel pipe (1), and one end of the connecting piece (5) is coaxially fixedly connected to a locking sleeve (6), and the locking sleeve (6) is also slidably sleeved on the outside of the grouting steel pipe (1) and can be locked with it to keep it relatively motionless.

2. The coal mine goaf fire prevention and extinguishing equipment according to claim 1, characterized in that: The locking sleeve (6) is clamped around the circumferential surface of the grouting steel pipe (1) to form a locking mechanism.

3. The coal mine goaf fire prevention and extinguishing equipment according to claim 2, characterized in that: The locking sleeve (6) includes a sleeve (16) that is slidably connected to the outside of the grouting steel pipe (1), and the end of the sleeve (16) that is away from the connector (5) is fixedly connected to a plurality of arc-shaped clamping plates (18), and the plurality of arc-shaped clamping plates (18) are evenly distributed in a ring shape, and all the arc-shaped clamping plates (18) extend along the axial direction of the sleeve (16) at the end facing away from the sleeve (16), and also gradually extend along its radial direction to form a conical structure. The external thread of the sleeve (16) is sleeved with an external bolt (17), and by driving the external bolt (17) to rotate and move toward the arc-shaped clamping plate (18), all the arc-shaped clamping plates (18) are gradually deformed inward. The inner side of the end of each arc-shaped clamping plate (18) is integrally formed and connected with a protrusion (20) along the direction in which the arc length extends.

4. The coal mine goaf fire prevention and extinguishing equipment according to claim 3, characterized in that: A limiting rib (19) is formed on the inner wall of the sliding sleeve (16) and protrudes radially inward. The limiting rib (19) is distributed along the axial direction of the sliding sleeve (16). A limiting guide groove (15) adapted to the limiting rib (19) is formed on the outer circumferential surface of the grouting steel pipe (1). The limiting rib (19) is nested in the limiting guide groove (15) and maintains a sliding fit connection therewith.

5. A coal mine goaf fire prevention and extinguishing equipment according to claim 3 or 4, characterized in that: The connecting member (5) includes a first sleeve (10), a connecting pipe (11) and a second sleeve (12), wherein the first sleeve (10) is slidably sleeved on the outside of the suspension rod (4), the second sleeve (12) is slidably sleeved on the outside of the grouting steel pipe (1), the second sleeve (12) is fixedly connected to the sliding sleeve (16), one end of the connecting pipe (11) is rotatably connected to the first sleeve (10), and the other end is fixedly connected to the second sleeve (12).

6. The coal mine goaf fire prevention and extinguishing equipment according to claim 4, characterized in that: The nozzle (3) is connected to the grouting steel pipe (1) in a ball joint manner, and a cylinder (7) is hingedly mounted on the outer circumference of the grouting steel pipe (1), and the cylinder (7) and the limiting guide groove (15) are located on the same straight line.

7. The coal mine goaf fire prevention and extinguishing equipment according to claim 4, characterized in that: An upper limit ring (13) and a lower limit ring (14) are fixedly mounted on the circumferential surface of the grouting steel pipe (1) at positions at both ends of the limit guide groove (15).

8. The coal mine goaf fire prevention and extinguishing equipment according to claim 1, characterized in that: Both ends of the boom (4) are slidably sleeved with telescopic sub-rods (8) along their axial directions, and the ends of the two telescopic sub-rods (8) are hinged to the hydraulic support in the horizontal direction; Both ends of the suspension rod (4) further extend radially outwards to form a limit baffle (9) as an integral part.

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