Nitrogen injection device for mine goaf

Abstract

This utility model discloses a nitrogen injection device for goaf areas in mines, including a mobile vehicle. An explosion-proof box is fixedly connected to the top of the mobile vehicle. A nitrogen injection device is installed inside the explosion-proof box. A guide pipe is installed at the output end of the nitrogen injection device. A check pipe is installed at one end of the guide pipe, and a flexible hose is installed at the other end of the check pipe. A mounting frame is fixedly connected to the outside of the mobile vehicle, and a hose retractor is installed on the top of the mounting frame. This utility model relates to the technical field of mobile nitrogen injection devices. This nitrogen injection device for goaf areas in mines uses three sets of triangularly arranged rollers to wind the flexible hose. During use, pulling the hose stretches the folded hose, facilitating nitrogen injection operations in goaf areas at different locations within the mine. When the mobile vehicle moves, the elastic force generated by the release of spring A causes the stretched hose to fold back into the mounting frame, preventing the hose from being dragged on the mine floor and avoiding damage from being run over by vehicles.

Description

Technical Field

[0001] This utility model relates to the technical field of mobile nitrogen injection devices, specifically a nitrogen injection device for use in mine goaf areas. Background Technology

[0002] A mine goaf refers to the voids and areas left underground after coal, metal ores, or other useful minerals have been extracted. During mining operations, nitrogen gas is injected into the goaf to create an oxygen-deficient environment, preventing spontaneous combustion of coal and suppressing gas explosions. Nitrogen injection systems used in mine goafs are divided into fixed and mobile systems. Mobile systems mount the injection equipment, air compressor, and other components on the roof of a trailer or flatbed truck. Compared to fixed systems, mobile systems can be quickly deployed to the required locations within the mine. This rapidly reduces the oxygen concentration in the goaf, effectively curbing the development of fires and preventing small hazards from escalating into major accidents.

[0003] Mobile nitrogen injection devices enable flexible nitrogen injection into multiple goaf areas within a mine via external hoses. However, some mines have confined spaces, and during mining operations, vehicles and workers move within the mine. The hoses, dragged along the mine floor, are easily crushed by vehicles, hindering worker movement. Furthermore, the long hoses are prone to tangling with wheels during movement, potentially causing the hoses to detach from the injection equipment and disrupting normal nitrogen injection operations in the goaf. Additionally, adjusting the nozzle angle during injection is inconvenient.

[0004] Therefore, this utility model provides a nitrogen injection device for mine goaf areas to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a nitrogen injection device for mine goaf areas, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a nitrogen injection device for mining goaf areas, comprising a mobile vehicle, an explosion-proof box fixedly connected to the top of the mobile vehicle, a nitrogen injection device installed inside the explosion-proof box, a guide pipe installed at the output end of the nitrogen injection device, a check pipe installed at one end of the guide pipe, a flexible hose installed at one end of the check pipe, an installation frame fixedly connected to the outside of the mobile vehicle, and a pipe take-up fitting installed on the top of the installation frame; The pipe receiving component includes a connecting rod fixedly connected to the top of the mounting frame, a slider slidably connected inside the connecting rod, a spring A fixedly connected between the connecting rod and the slider, and calipers symmetrically mounted on the top of the slider; One end of the hose is fitted with a nozzle; An angle adjustment component is installed on the top of the mounting bracket; The check pipe has a check valve installed inside.

[0007] Preferably, a limiting rod is fixedly connected to the top of the mounting bracket, and limiting wheels are symmetrically installed on the top of the limiting rod.

[0008] Preferably, the angle adjusting component includes a bracket plate fixedly connected to the top of the mounting frame, a rotating disk rotatably connected to the top of the bracket plate, a connecting seat fixedly connected to the top of the rotating disk, a hinge seat mounted on the top of the connecting seat, a lower clamping plate fixedly connected to the top of the hinge seat, and an upper clamping plate mounted on the top of the lower clamping plate.

[0009] Preferably, a threaded post is fixedly connected to the top of the support plate, a fixing nut is threaded to the outer side of the threaded post, and a rotating groove is formed on the outer side of the rotating plate.

[0010] Preferably, a positioning bolt is installed between the connecting seat and the hinge seat.

[0011] Preferably, the check valve includes a guide plate fixedly connected inside the check pipe, a guide hole is provided on the outer side of the guide plate, a slide rod is slidably connected to the center of the guide plate, a sealing plate is fixedly connected to one end of the slide rod, and a spring B is fixedly connected between the guide plate and the slide rod. Beneficial effects

[0012] This utility model provides a nitrogen injection device for use in mine goaf areas. Compared with the prior art, it has the following advantages: 1. The nitrogen injection device used in the goaf of this mine uses three sets of triangularly arranged rollers to wind the hose. When in use, pulling the hose stretches the folded hose, making it convenient to inject nitrogen into different goaf locations within the mine. When the mobile vehicle moves, the elastic force generated by the release of spring A causes the stretched hose to fold back into the mounting frame, preventing the hose from being dragged on the mine floor, avoiding damage to the hose from being run over by vehicles, and preventing the dragged hose from affecting the movement of construction personnel and the mobile vehicle.

[0013] 2. The nitrogen injection device used in the goaf of this mine does not have a fixed angle when injecting nitrogen into the goaf. Depending on the different nitrogen injection effects required by the goaf, the nitrogen injection pipe can be inclined or horizontal. The rotating disc on the top of the support plate can easily adjust the spray angle of the nozzle. At the same time, the hinged seat connected by the top of the connecting seat can easily adjust the tilt angle of the nozzle. The adjustment of the nozzle deflection angle is simple. Attached Figure Description

[0014] Figure 1 This is a perspective view of the external structure of this utility model; Figure 2 This is a structural schematic diagram of the pipe receiving fitting of this utility model; Figure 3 This is a structural schematic diagram of the angle adjustment component of this utility model; Figure 4 This is a schematic diagram of the anti-return component of this utility model.

[0015] In the diagram: 1. Mobile vehicle; 2. Explosion-proof box; 3. Nitrogen injection equipment; 4. Guide pipe; 5. Check pipe; 6. Hose; 7. Mounting bracket; 8. Pipe retraction fitting; 801. Connecting rod; 802. Slider; 803. Spring A; 804. Caster wheel; 9. Nozzle; 10. Angle adjustment component; 1001. Support plate; 1002. Rotary plate; 1003. Connecting seat; 1004. Hinge seat; 1005. Lower clamping plate; 1006. Upper clamping plate; 11. Check pipe component; 1101. Guide plate; 1102. Sliding rod; 1103. Sealing plate; 1104. Spring B; 12. Limiting rod; 13. Limiting wheel; 14. Threaded post; 15. Rotating groove; 16. Positioning bolt. Detailed Implementation

[0016] 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. Example 1:

[0017] Please see Figure 1-4 A nitrogen injection device for use in goaf areas of mines includes a mobile vehicle 1, an explosion-proof box 2 fixedly connected to the top of the mobile vehicle 1, a nitrogen injection device 3 installed inside the explosion-proof box 2, a guide pipe 4 installed at the output end of the nitrogen injection device 3, the guide pipe 4 fixedly connected to the outside of the explosion-proof box 2, a check pipe 5 installed at one end of the guide pipe 4, a flexible hose 6 installed at one end of the check pipe 5, an installation frame 7 fixedly connected to the outside of the mobile vehicle 1, a hose reel 8 installed on the top of the installation frame 7, and the flexible hose 6 wrapped inside the hose reel 8. The pipe receiving fitting 8 includes a connecting rod 801 fixedly connected to the top of the mounting bracket 7, a slider 802 slidably connected inside the connecting rod 801, a spring A803 fixedly connected between the connecting rod 801 and the slider 802, and calipers 804 symmetrically mounted on the top of the slider 802. The connecting rod 801 has three sets, and the three sets of locating rollers 804 are arranged in a triangle. One end of the hose 6 is snapped with a nozzle 9; An angle adjustment component 10 is installed on the top of the mounting bracket 7, and the nozzle 9 is installed inside the angle adjustment component 10.

[0018] The top of the mounting bracket 7 is fixedly connected to a limiting rod 12. There are two limiting rods 12, and the top of the limiting rods 12 is symmetrically equipped with limiting wheels 13. The hose 6 passes through the two limiting wheels 13.

[0019] The angle adjustment component 10 includes a bracket plate 1001 fixedly connected to the top of the mounting frame 7. A rotating plate 1002 is rotatably connected to the top of the bracket plate 1001. A connecting seat 1003 is fixedly connected to the top of the rotating plate 1002. A hinge seat 1004 is installed on the top of the connecting seat 1003. A lower clamping plate 1005 is fixedly connected to the top of the hinge seat 1004. An upper clamping plate 1006 is installed on the top of the lower clamping plate 1005. The lower clamping plate 1005 and the upper clamping plate 1006 are fixed by screws and nuts. The nozzle 9 is installed inside the lower clamping plate 1005 and the upper clamping plate 1006.

[0020] The top of the support plate 1001 is fixedly connected to a threaded post 14, and a fixing nut is threadedly connected to the outside of the threaded post 14. The outer side of the rotating plate 1002 is provided with a rotating groove 15, which is set at 180 degrees.

[0021] A positioning bolt 16 is installed between the connecting seat 1003 and the hinge seat 1004.

[0022] In this embodiment, when installing the hose 6, one end of the hose 6 is connected to the nitrogen injection device 3 inside the explosion-proof box 2, and the hose 6 is passed between the two limiting wheels 13 at the top of the limiting rod 12. The two limiting wheels 13 limit the hose 6, preventing it from coming loose inside the mounting bracket 7. Then, the hose 6 is passed between the two calipers 804 symmetrically installed at the top of the three sets of connecting rods 801. The nozzle 9 is then installed at the other end of the hose 6. When the nitrogen injection device 3 is in standby mode, the spring A803 inside the connecting rod 801 is in a released state. The elastic force generated by the spring A803 makes... The hose 6 is folded and stored inside the mounting frame 7 to prevent excessively long hose 6 from being dragged on the mine floor, thus preventing it from being damaged by vehicles and also preventing the dragging hose 6 from affecting the movement of construction personnel and the mobile vehicle 1. Nitrogen injection methods in the mine goaf can be divided into two types according to requirements. First, for deeper goaf areas, loosen the screws and fixing nuts between the lower clamping plate 1005 and the upper clamping plate 1006, and remove the nozzle 9 from inside the lower clamping plate 1005 and the upper clamping plate 1006. Pulling the hose 6 allows the nozzle 9 to be inserted into the cracks in the goaf area to inject nitrogen into the gas at the cracks. Dilution allows for direct fire extinguishing at the ignition point. In this case, the slider 802 drives the top retaining wheel 804 to slide inside the connecting rod 801, while the spring A803 is compressed, causing the hose 6 to extend. Secondly, for shallower goaf areas, the nozzle 9 can be directly installed inside the lower retaining plate 1005 and upper retaining plate 1006 at the top of the hinge seat 1004, and the nozzle 9 inside the lower retaining plate 1005 and upper retaining plate 1006 can be fixed using screws and fixing nuts. Nitrogen injection into the goaf is performed by fixing the nozzle 9. Simultaneously, nitrogen injection can be performed according to the nozzle 9. To meet angle requirements, the rotating disk 1002 on top of the rotating support disk 1001 is rotated to change the deflection angle of the nozzle 9. When the tilt angle needs to be changed after nitrogen injection, the tilt angle of the nozzle 9 is adjusted by rotating the hinge seat 1004 on top of the connecting seat 1003. The adjustment method is simple. The rotating groove 15 facilitates precise positioning of the deflection angle of the nozzle 9. The positioning bolt 16 facilitates fixing the tilted nozzle 9. The tops of the two chucks 804 and the two limit wheels 13 are all equipped with U-shaped clamps to prevent the hose 6 from detaching from the two chucks 804 or the two limit wheels 13 when the hose 6 is pulled. Example 2:

[0023] Please see Figure 1-4 This embodiment provides a nitrogen injection device for mine goaf areas based on embodiment one: a check pipe 5 is equipped with a check valve 11 inside; The check valve 11 includes a guide plate 1101 fixedly connected inside the check pipe 5. A guide hole is provided on the outer side of the guide plate 1101. A slide rod 1102 is slidably connected to the center of the guide plate 1101. A sealing plate 1103 is fixedly connected to one end of the slide rod 1102. The diameter of the sealing plate 1103 is larger than the outer diameter of the guide hole and smaller than the inner diameter of the check pipe 5. A spring B1104 is fixedly connected between the guide plate 1101 and the slide rod 1102.

[0024] In this embodiment, when the nitrogen injection equipment 3 malfunctions and stops suddenly, or when the control valve inside the guide pipe 4 malfunctions, the high concentration of methane or coal dust inside the goaf is very likely to flow back into the nitrogen injection equipment 3, thus posing a great safety hazard to the nitrogen injection equipment 3. When the nitrogen injection equipment 3 stops operating, the elastic force generated by the spring B1104 drives the sealing plate 1103 to reset, thereby sealing the guide hole on the outside of the guide plate 1101. During the nitrogen injection process, the sealing plate 1103 is pushed open from the outside of the guide plate 1101 by air pressure, thereby facilitating the transportation of nitrogen.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0026] Working principle: Before using the equipment, inspect the explosion-proof box 2, spring A803, and spring B1104 to ensure normal operation. Pass the hose 6 between the symmetrically arranged limit wheels 13 at the top of the two limit rods 12, and then between the two retaining rollers 804 at the top of the slider 802. Connect one end of the hose 6 to one end of the check pipe 5, and install the nozzle 9 at the other end of the hose 6. When the nitrogen injection equipment 3 is in standby mode, spring A803 is released, causing the hose 6 to fold inside the mounting bracket 7. Two operating methods can be selected according to nitrogen injection requirements. When a deeper... When injecting nitrogen into the goaf, loosen the screw and fixing nut connecting the lower clamping plate 1005 and the upper clamping plate 1006, and remove the nozzle 9 from inside the lower clamping plate 1005 and the upper clamping plate 1006. Use the nozzle 9 by hand, pull the hose 6, causing the slider 802 to slide on top of the connecting rod 801. At the same time, the spring A803 is compressed, causing the hose 6 to extend. After releasing the hose 6, the spring A803 drives the retaining wheel 804 on top of the slider 802 to reset, thereby folding the hose 6 back inside the mounting frame 7 to prevent the hose 6 from dragging on the mine floor. To prevent the hose 6 from being run over by vehicles and to prevent the dragging hose 6 from affecting construction personnel and the movement of the mobile vehicle 1 in the mine, a fixed nitrogen injection method can be used for shallow goaf areas. The nozzle 9 is fixed inside the lower clamping plate 1005 and the upper clamping plate 1006. When it is necessary to adjust the tilt angle and deflection angle of the nozzle 9, the deflection angle of the nozzle 9 is changed by rotating the rotating plate 1002 on the top of the support plate 1001. When adjusting the deflection angle of the nozzle 9, the deflection angle of the nozzle 9 is accurately measured by the angle between the rotating groove 15 on the outer side of the rotating plate 1002 and the threaded column 14, and the fixing nut is used to secure it. The rotating disk 1002 is fixed at the top of the support disk 1001. The tilt angle of the nozzle 9 is changed by rotating the hinge seat 1004 at the top of the connecting seat 1003 and fixing it with the positioning bolt 16. The angle adjustment of the nozzle 9 is simple and quick. When the control valve inside the nitrogen injection equipment 3 or the guide pipe 4 malfunctions, the spring B1104 drives the sealing plate 1103 to reset, thereby sealing the guide hole on the outside of the guide plate 1101 with the sealing plate 1103, preventing gas or coal dust in the goaf from entering the nitrogen injection equipment 3 and avoiding damage to the nitrogen injection equipment 3 and safety accidents.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nitrogen injection device for use in goaf areas of mines, comprising a mobile vehicle (1), characterized in that: The top of the mobile vehicle (1) is fixedly connected to an explosion-proof box (2), and a nitrogen injection device (3) is installed inside the explosion-proof box (2). A guide pipe (4) is installed at the output end of the nitrogen injection device (3). A check pipe (5) is installed at one end of the guide pipe (4). A hose (6) is installed at one end of the check pipe (5). A mounting frame (7) is fixedly connected to the outside of the mobile vehicle (1). A pipe take-up fitting (8) is installed on the top of the mounting frame (7). The pipe receiving component (8) includes a connecting rod (801) fixedly connected to the top of the mounting bracket (7), a slider (802) is slidably connected inside the connecting rod (801), a spring A (803) is fixedly connected between the connecting rod (801) and the slider (802), and calipers (804) are symmetrically installed on the top of the slider (802). One end of the hose (6) is fitted with a nozzle (9); An angle adjustment component (10) is installed on the top of the mounting bracket (7); The check pipe (5) has a check element (11) installed inside.

2. A nitrogen injection device for use in a mine goaf according to claim 1, characterized in that: The top of the mounting bracket (7) is fixedly connected to a limiting rod (12), and the top of the limiting rod (12) is symmetrically equipped with limiting wheels (13).

3. A nitrogen injection device for use in a mine goaf according to claim 1, characterized in that: The angle adjustment component (10) includes a support plate (1001) fixedly connected to the top of the mounting bracket (7). A rotating plate (1002) is rotatably connected to the top of the support plate (1001). A connecting seat (1003) is fixedly connected to the top of the rotating plate (1002). A hinge seat (1004) is installed on the top of the connecting seat (1003). A lower clamping plate (1005) is fixedly connected to the top of the hinge seat (1004). An upper clamping plate (1006) is installed on the top of the lower clamping plate (1005).

4. A nitrogen injection device for use in a mine goaf according to claim 3, characterized in that: The top of the support plate (1001) is fixedly connected to a threaded column (14), and a fixing nut is threadedly connected to the outside of the threaded column (14). A rotating groove (15) is opened on the outside of the rotating plate (1002).

5. A nitrogen injection device for use in a mine goaf according to claim 3, characterized in that: A positioning bolt (16) is installed between the connecting seat (1003) and the hinge seat (1004).

6. A nitrogen injection device for use in a mine goaf according to claim 1, characterized in that: The check valve (11) includes a guide plate (1101) fixedly connected inside the check pipe (5). A guide hole is provided on the outer side of the guide plate (1101). A slide rod (1102) is slidably connected to the center of the guide plate (1101). A sealing plate (1103) is fixedly connected to one end of the slide rod (1102). A spring B (1104) is fixedly connected between the guide plate (1101) and the slide rod (1102).

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