Nitrogen injection pipeline connecting device

Abstract

The utility model relates to the technical field of coal mine fire prevention, in particular to a nitrogen injection pipeline connecting device which comprises a protective box body, an opening and closing door is arranged on the front side of the protective box body, an observation window is arranged on the surface of the opening and closing door, a nitrogen injection connecting pipe is arranged on the inner side of the protective box body, and a nitrogen leakage detector is arranged above the nitrogen injection connecting pipe. A first valve is arranged at the left end of a nitrogen injection connecting pipe; a flow meter is arranged on the left side of the first valve; a second valve is arranged at the right end of the nitrogen injection connecting pipe; a second nitrogen injection pipe is arranged at the right end of the second valve; a grouting connecting pipe is arranged at the lower end of the third valve, a fourth valve is arranged at the left end of the grouting connecting pipe, and a grouting inlet pipe is arranged at the lower end of the left side of the protective box. According to the utility model, the nitrogen injection pipeline and the grouting pipeline are controlled through a plurality of valves, so that flexible adjustment of nitrogen injection and grouting is realized.

Description

Technical Field

[0001] This utility model relates to the field of coal mine fire prevention technology, and in particular to a nitrogen injection pipeline connection device. Background Technology

[0002] Coal is my country's main energy source and occupies a very important position in the national economic energy structure. While the production of raw coal is growing rapidly, it is essential to ensure the safe and efficient mining of coal mines. Mine fires are one of the major natural disasters in coal mines.

[0003] Currently, according to Article 68 of the "Detailed Rules for Fire Prevention and Extinguishing in Coal Mines", when inert gas is used for fire prevention in the goaf of a coal mining face, the location of the release port should be determined based on the diffusion radius of the inert gas, the working face parameters, and the distribution law of the "three zones" of spontaneous combustion in the goaf. The release port should be kept within the oxidation zone of the goaf.

[0004] However, most existing coal mines adopt a comprehensive fire prevention and extinguishing measure that mainly uses nitrogen injection and supplements it with grouting. According to the requirements, the nitrogen injection pipeline release port must always be in the oxidation zone of the goaf. According to the regulations, two nitrogen injection pipelines need to be installed, and at least one grouting pipeline needs to be laid. The laying of multiple pipelines leads to high installation costs and high labor intensity for workers. Utility Model Content

[0005] In order to overcome the problems of existing coal mines that mostly adopt nitrogen injection as the main method and grouting as a supplementary comprehensive fire prevention and extinguishing measure, the laying of multiple pipelines leads to high installation costs and high labor intensity for workers.

[0006] The technical solution of this utility model is as follows: a nitrogen injection pipeline connection device, including a protective box, a switch door on the front side of the protective box, an observation window on the surface of the switch door, a nitrogen injection connection pipe inside the protective box, a nitrogen leak detector above the nitrogen injection connection pipe, an alarm fixedly installed at the upper end of the protective box, a nitrogen injection pipe one at the upper left side of the protective box, a valve one at the left end of the nitrogen injection connection pipe, a flow meter at the left side of the valve one, a valve two at the right end of the nitrogen injection connection pipe, a nitrogen injection pipe two at the right end of the valve two, a valve three at the lower end of the nitrogen injection connection pipe, a grouting connection pipe at the lower end of the valve three, a valve four at the left end of the grouting connection pipe, and a grouting inlet pipe at the lower left side of the protective box.

[0007] Preferably, multiple valves are used to control the nitrogen injection pipeline and grouting pipeline, enabling flexible adjustment of nitrogen injection and grouting. A protective enclosure is installed to protect each valve. Workers can observe the internal condition of the protective enclosure through the observation window. A nitrogen leak detector facilitates timely detection of abnormalities for inspection and maintenance.

[0008] Preferably, the side of the door and the protective housing are connected by hinges, the front of the protective housing is magnetically connected, and the observation window is fixedly connected to the surface of the door.

[0009] Preferably, the nitrogen leak detector is fixedly connected to the inside of the protective enclosure, and the alarm is electrically connected to the nitrogen leak detector.

[0010] Preferably, the left end of nitrogen injection pipe one is provided with an air inlet connector, the right end of nitrogen injection pipe one extends to the inside of the protective box and is connected to the left end of the flow meter, the right end of the flow meter is connected to valve one, and the right end of valve one is connected to the nitrogen injection connection pipe.

[0011] Preferably, the left end of valve two is connected to the nitrogen injection connection pipe, the right end of valve two is connected to nitrogen injection pipe two, and the right end of nitrogen injection pipe two extends to the outside of the protective box and is equipped with an exhaust connector.

[0012] Preferably, the upper end of valve three is connected to the nitrogen injection connection pipe, the lower end of valve three is connected to the grouting connection pipe, and the right end of the grouting connection pipe extends to the outside of the protective box and is equipped with a discharge joint.

[0013] Preferably, the left end of the grouting inlet pipe is provided with a feed connector, the right end of the grouting inlet pipe extends to the inside of the protective box and is connected to valve four, and the right end of valve four is connected to the grouting connection pipe.

[0014] The beneficial effects of this utility model are:

[0015] This nitrogen injection pipeline connection device controls the nitrogen injection pipeline and grouting pipeline through valves one, two, three, and four, enabling flexible adjustment of nitrogen injection and grouting. Workers can observe the internal condition of the protective enclosure through the observation window. The protective enclosure protects various structures, and the nitrogen leak detector and alarm work together to promptly detect leaks and alert workers for maintenance. This device has a simple structure, is easy to manufacture and install, and features rapid switching and step-by-step nitrogen injection and grouting, achieving cost reduction and efficiency improvement, and possessing high engineering practical value. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural representation of the nitrogen injection pipeline connection device of this utility model. Figure 1 ;

[0017] Figure 2 The diagram shown is a three-dimensional structural representation of the nitrogen injection pipeline connection device of this utility model. Figure 2 ;

[0018] Figure 3 The diagram shown is a three-dimensional structural representation of the nitrogen injection pipeline connection device of this utility model. Figure 3 ;

[0019] Figure 4 The diagram shown is a three-dimensional structural representation of the nitrogen injection pipeline connection device of this utility model. Figure 4 ;

[0020] Figure 5 The diagram shown is a three-dimensional cross-sectional view of the nitrogen injection pipeline connection device of this utility model.

[0021] Explanation of reference numerals in the attached diagram: 1. Protective enclosure; 2. Opening / closing door; 3. Observation window; 4. Nitrogen injection connection pipe; 5. Nitrogen leak detector; 6. Alarm; 7. Nitrogen injection pipe one; 8. Valve one; 9. Flow meter; 10. Valve two; 11. Nitrogen injection pipe two; 12. Valve three; 13. Grouting connection pipe; 14. Valve four; 15. Grouting inlet pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-5 This utility model provides an embodiment: a nitrogen injection pipeline connection device, including a protective housing 1, a switch door 2 on the front side of the protective housing 1, an observation window 3 on the surface of the switch door 2, a nitrogen injection connection pipe 4 inside the protective housing 1, a nitrogen leak detector 5 above the nitrogen injection connection pipe 4, an alarm 6 fixedly installed at the upper end of the protective housing 1, a nitrogen injection pipe 7 on the upper left side of the protective housing 1, a valve 8 on the left end of the nitrogen injection connection pipe 4, a flow meter 9 on the left side of the valve 8, a valve 10 on the right end of the nitrogen injection connection pipe 4, and a nitrogen injection pipe 10 on the right end of the valve 10. 1. A valve 3 12 is installed at the lower end of the nitrogen injection connection pipe 4. A grouting connection pipe 13 is installed at the lower end of the valve 3 12. A valve 4 14 is installed at the left end of the grouting connection pipe 13. A grouting inlet pipe 15 is installed at the lower end of the left side of the protective box 1. By controlling the nitrogen injection pipeline and the grouting pipeline through valve 1 8, valve 2 10, valve 3 12 and valve 4 14, the nitrogen injection and grouting can be flexibly adjusted. The staff can observe the internal condition of the protective box 1 through the observation window 3. The protective box 1 protects the various structures. The nitrogen leak detector 5 and the alarm 6 work together to detect leaks in time and remind the staff to carry out maintenance.

[0024] Please see Figures 1-4In this embodiment, the side of the switch door 2 and the protective box 1 are connected by hinges, the front of the protective box 1 is magnetically connected, the observation window 3 is fixedly connected to the surface of the switch door 2, the nitrogen leak detector 5 is fixedly connected to the inside of the protective box 1, and the alarm 6 is electrically connected to the nitrogen leak detector 5. During operation, the protective box 1 and the switch door 2 protect each valve. The staff can observe the internal condition of the protective box 1 through the observation window 3 and detect the nitrogen concentration inside the protective box 1 through the nitrogen leak detector 5. When the concentration is higher than the normal value, the alarm 6 is controlled to sound an alarm to remind the staff to carry out timely maintenance.

[0025] Please see Figures 2-5 In this embodiment, the left end of nitrogen injection pipe 7 is provided with an air inlet connector, the right end of nitrogen injection pipe 7 extends to the inside of the protective housing 1 and is connected to the left end of flow meter 9, the right end of flow meter 9 is connected to valve 8, the right end of valve 8 is connected to nitrogen injection connecting pipe 4, the left end of valve 10 is connected to nitrogen injection connecting pipe 4, the right end of valve 10 is connected to nitrogen injection pipe 11, the right end of nitrogen injection pipe 11 extends to the outside of the protective housing 1 and is provided with an exhaust connector, the upper end of valve 12 is connected to nitrogen injection connecting pipe 4, and valve 12... The lower end of 12 is connected to the grouting connection pipe 13. The right end of the grouting connection pipe 13 extends to the outside of the protective box 1 and is provided with a discharge joint. The left end of the grouting inlet pipe 15 is provided with a feed joint. The right end of the grouting inlet pipe 15 extends to the inside of the protective box 1 and is connected to the valve 14. The right end of the valve 14 is connected to the grouting connection pipe 13. The air inlet pipe is connected to the nitrogen injection pipe 7, the nitrogen delivery pipe is connected to the nitrogen injection pipe 11, the grouting pipe is connected to the grouting inlet pipe 15, and the slurry delivery pipe is connected to the grouting connection pipe 13, thus realizing the connection and installation of the device.

[0026] During operation, connect the air inlet pipe to nitrogen injection pipe 7, the nitrogen delivery pipe to nitrogen injection pipe 11, the grouting pipe to grouting inlet pipe 15, and the slurry delivery pipe to grouting connection pipe 13 to connect and install the device. The nitrogen injection and grouting pipelines are arranged in a step-by-step manner. The nitrogen injection pipeline enters the goaf for 50m-78m and then disconnects the grouting pipeline. When the nitrogen injection pipeline enters the goaf for more than 94m, the grouting pipeline enters the goaf for 16m-44m, ensuring that the nitrogen release port remains within the oxidation zone of the goaf to effectively inject nitrogen into the oxidation zone. When the nitrogen injection pipeline enters the goaf for 50m-78m, disconnect the grouting pipeline. By opening valves 18 and 32, and closing valves 20 and 44, nitrogen can smoothly pass through the grouting pipeline and be injected into the oxidation zone of the goaf. When the grouting pipeline enters the goaf for 50m-78m, the nitrogen injection pipeline is disconnected, valve 3.12 is closed, and valve 2.10 is opened. Nitrogen can then be injected smoothly into the oxidation zone of the goaf through the nitrogen injection pipeline. During grouting, valve 4.14 is opened, and grouting can proceed through valve 3.12. When signs of spontaneous combustion appear at the working face, and continuous grouting and nitrogen injection are required, valve 3.12 is closed, and valves 1.8, 2.10, and 4.14 are opened. Nitrogen injection through the nitrogen injection pipeline and grouting through the grouting pipeline do not affect each other. During operation, the protective box 1 and the switch door 2 protect each valve. Workers can observe the internal condition of the protective box 1 through the observation window 3 and detect the nitrogen concentration inside the protective box 1 through the nitrogen leakage detector 5. When the concentration is higher than the normal value, the alarm 6 is activated to remind workers to carry out timely maintenance.

[0027] Through the above steps, by controlling the nitrogen injection pipeline and grouting pipeline through valve 1 (8), valve 2 (10), valve 3 (12), and valve 4 (14), flexible adjustment of nitrogen injection and grouting can be achieved. This solves the problem that most existing coal mines adopt comprehensive fire prevention and extinguishing measures with nitrogen injection as the main method and grouting as the auxiliary method. The laying of multiple pipelines leads to high installation costs and high labor intensity for workers.

Claims

1. A nitrogen injection pipeline connection device, comprising a protective housing (1), characterized in that: A switch door (2) is provided on the front side of the protective box (1). An observation window (3) is provided on the surface of the switch door (2). A nitrogen injection connection pipe (4) is provided on the inside of the protective box (1). A nitrogen leak detector (5) is provided above the nitrogen injection connection pipe (4). An alarm (6) is fixedly installed on the upper end of the protective box (1). A nitrogen injection pipe (7) is provided on the upper left side of the protective box (1). A valve (8) is provided on the left end of the nitrogen injection connection pipe (4). A flow meter (9) is provided on the left side of the valve (8). A valve (10) is provided on the right end of the nitrogen injection connection pipe (4). A nitrogen injection pipe (11) is provided on the right end of the valve (10). A valve (12) is provided on the lower end of the nitrogen injection connection pipe (4). A grouting connection pipe (13) is provided on the lower end of the valve (12). A valve (14) is provided on the left end of the grouting connection pipe (13). A grouting inlet pipe (15) is provided on the lower left side of the protective box (1).

2. The nitrogen injection pipeline connection device according to claim 1, characterized in that: The side of the switch door (2) and the protective box (1) are connected by hinges. The front of the protective box (1) of the switch door (2) is magnetically connected. The observation window (3) and the surface of the switch door (2) are fixedly connected.

3. The nitrogen injection pipeline connection device according to claim 1, characterized in that: The nitrogen leak detector (5) is fixedly connected to the inside of the protective enclosure (1), and the alarm (6) is electrically connected to the nitrogen leak detector (5).

4. The nitrogen injection pipeline connection device according to claim 1, characterized in that: The left end of nitrogen injection pipe 1 (7) is provided with an air inlet connector. The right end of nitrogen injection pipe 1 (7) extends to the inside of the protective box (1) and is connected to the left end of the flow meter (9). The right end of the flow meter (9) is connected to the valve 1 (8). The right end of the valve 1 (8) is connected to the nitrogen injection connection pipe (4).

5. A nitrogen injection pipeline connection device according to claim 1, characterized in that: The left end of valve 2 (10) is connected to nitrogen injection pipe (4), and the right end of valve 2 (10) is connected to nitrogen injection pipe 2 (11). The right end of nitrogen injection pipe 2 (11) extends to the outside of the protective box (1) and is equipped with an exhaust connector.

6. A nitrogen injection pipeline connection device according to claim 1, characterized in that: The upper end of valve three (12) is connected to nitrogen injection connection pipe (4), and the lower end of valve three (12) is connected to grouting connection pipe (13). The right end of grouting connection pipe (13) extends to the outside of protective box (1) and is provided with a discharge joint.

7. A nitrogen injection pipeline connection device according to claim 1, characterized in that: The left end of the grouting inlet pipe (15) is provided with a feed joint, and the right end of the grouting inlet pipe (15) extends to the inside of the protective box (1) and is connected to the valve four (14). The right end of the valve four (14) is connected to the grouting connection pipe (13).

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