Device for preventing spontaneous combustion of coal seam

Abstract

The utility model discloses a device for preventing spontaneous combustion of a coal seam. The coal seam spontaneous combustion prevention and control device comprises a framework, the framework is in an inverted T shape, an inclined strut is installed on the framework, the framework and the inclined strut form a triangular structure, a safety pipe is installed on the framework, the interior of the safety pipe is hollow, a feeding port is formed in the side wall of the safety pipe, a plurality of through holes are formed in the lower end of the safety pipe, and the through holes are communicated with the inclined strut. Longitudinal pipes are arranged on one sides of the frameworks, and the two frameworks are connected through the longitudinal pipes. According to the device for preventing spontaneous combustion of the coal seam, the safety pipe is arranged to achieve the effects of cooling the interior of the coal seam and isolating air, compared with an existing water spraying cooling mode, the device directly cools the center of a coal pile with the maximum spontaneous combustion risk, and the possibility of spontaneous combustion of the coal seam is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal seam fire prevention technical field especially relates to a kind of coal seam spontaneous combustion fire prevention device. BACKGROUND

[0002] Coal spontaneous combustion refers to the phenomenon that coal burns by itself when heat generated by oxidation reaction of coal itself under natural conditions accumulates to a certain degree and temperature reaches the ignition point of coal, and the specific reason is that coal is a complex organic rock containing various organic components and minerals. Among them, pyrite (main component is ferrous sulfide) in coal is prone to oxidation reaction. When coal is mined out, coal body is broken, and the contact area between pyrite and oxygen in air increases, so heat is released during the oxidation process. When heat accumulates to a certain degree, coal seam burns.

[0003] The prior art uses water sprinkling to inhibit the occurrence of coal spontaneous combustion, but since coal spontaneous combustion often occurs inside the coal seam, that is, from inside to outside, it is difficult to ensure that the inside of the coal seam is fully wetted.

[0004] Therefore, it is necessary to provide a coal seam spontaneous combustion fire prevention device to solve the above technical problems. SUMMARY

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a coal seam spontaneous combustion fire prevention device which can block the spontaneous combustion conditions of coal from inside the coal seam and reduce the risk of spontaneous combustion.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The coal seam spontaneous combustion fire prevention device comprises a framework, the framework is inverted T-shaped, a diagonal brace is installed on the framework, the framework and the diagonal brace form a triangular structure, a safety tube is installed on the framework, the safety tube is hollow inside, a feed inlet is provided on the side wall of the safety tube, a plurality of through holes are provided at the lower end of the safety tube, a longitudinal pipe is provided on one side of the framework, and two frameworks are connected by the longitudinal pipe.

[0008] Preferably, first extension pipes are respectively provided on both sides of the framework, the first extension pipes are threadedly connected with the framework through connectors, a connecting end is provided on the upper end of the connector, a second extension pipe is threadedly installed on the upper end of the framework, a connecting end is also provided on the side wall of the second extension pipe, and the safety tube is threadedly installed on the connecting end of the connector and the connecting end of the second extension pipe at both ends.

[0009] Preferably, a connecting end is also provided on the framework, and the two ends of the diagonal brace are threadedly installed on the connecting end.

[0010] Preferably, a condensing pipe is arranged on the inclined support, and the condensing pipe is arranged in an S shape.

[0011] Preferably, an observation hole is arranged on the safety pipe and located at the upper end of the feeding port.

[0012] Preferably, a temperature detector is arranged in the framework.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] (1) The safety pipe is arranged to cool and isolate air in the coal seam, and compared with the existing water spraying cooling method, the device directly cools the center of the coal pile with the highest spontaneous combustion risk and reduces the possibility of spontaneous combustion of the coal seam.

[0015] (2) The first and second extension pipes are arranged to increase the size of the device, so that it can be applied to larger coal piles.

[0016] (3) The inclined support is threadedly connected with the framework to realize on-site installation and disassembly of the device after use, thereby reducing the site occupation and facilitating the transportation of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of the coal seam spontaneous combustion prevention and control device is shown in the schematic view.

[0018] Figure 2 The structure of the coal seam spontaneous combustion prevention and control device is shown in the schematic view.

[0019] Figure 3 The Figure 2 The enlarged view of A in the middle;

[0020] Figure 4 The working state of the coal seam spontaneous combustion prevention and control device is shown in the cross-sectional view.

[0021] Wherein, the name corresponding to the reference sign is: 101, framework; 102, inclined support; 103, safety pipe; 104, feeding port; 105, observation hole; 106, connecting end; 107, vertical pipe; 108, connector; 109, condensing pipe; 110, threaded sleeve; 111, first extension pipe; 112, second extension pipe. DETAILED DESCRIPTION

[0022] The present application will be further described below in combination with the drawings and examples, and the mode of the present application includes but is not limited to the following examples.

[0023] First embodiment:

[0024] As Figures 1-4 shown, the device for preventing and treating coal seam spontaneous combustion provided by the utility model, comprising: framework 101, framework 101 is inverted T-shaped, can adopt circular steel pipe welding production, the inclined brace 102 is installed on the framework 101, and the framework 101 and the inclined brace 102 constitute a triangular structure, the above-mentioned part constitutes the single frame fixed frame of the device, and the device is formed by the parallel arrangement of several frames of fixed frames, and the device is buried on the device by the mined coal, the safety tube 103 is installed on the framework 101, the safety tube 103 is hollow inside, is used for conveying water or carbon dioxide gas, the side wall of the lower position of the safety tube 103 is equipped with the feed inlet 104, the upper end of the safety tube 103 is opened, and the lower end of the safety tube 103 is equipped with a plurality of through holes, and the longitudinal pipe 107 is arranged on one side of the framework 101, and two frameworks 101 are connected through the longitudinal pipe 107, as shown in Figure 1 shown, the whole structure is formed by the arrangement, when using, the device is placed on the ground of the stacking site, then the coal car is poured on the device above the mined coal, and the cross section of the coal seam finally formed is as shown in Figure 4 shown, the shadow part represents the coal pile, and the device also has coal blocks inside, in order to clearly show the position of the device, not drawn, the feed inlet 104 on the safety tube 103 is connected with the high-pressure water pump outside, the internal temperature of the coal pile is increased after being stored for a certain period of time, at this time, the water pump is started, the water body is conveyed from the feed inlet 104 into the safety tube 103, and is conveyed from the lower end of the safety tube 103 to the upper end opening, in the process, the water body flows out from the through hole at the lower end of the safety tube 103, and the water body after flowing out drops on the surface of the coal block and flows downward along the gap between the coal blocks, so that the coal seam inside is wetted by water, in addition, carbon dioxide gas can also be input from the feed inlet 104, and the carbon dioxide is also discharged from the through hole at the lower end of the safety tube 103, the density of the carbon dioxide gas is greater than that of air, after being discharged from the safety tube 103, the hot air in the gap of the coal block is squeezed out, and then the combustion is blocked.

[0025] By setting the safety tube 103, the effect of cooling and air isolation on the coal seam inside is realized, compared with the existing water spraying cooling mode, the device directly cools and processes the center of the coal pile with the greatest spontaneous combustion risk, and the possibility of coal seam spontaneous combustion is reduced.

[0026] Second embodiment:

[0027] As Figures 1-3 shown, the first extension pipe 111 is arranged on both sides of the framework 101, the first extension pipe 111 is made of the same circular steel pipe as the framework 101, and the first extension pipe 111 is threadedly connected with the framework 101 through the connector 108, as shown in Figure 3As shown, connector 108 is cross-shaped, similar to a four-way connector for water pipes. Connecting end 106 is hinged to the upper end of connector 108. Connecting end 106 is also made of steel pipe with threads on the inner wall. A second extension tube 112 is threaded onto the upper end of the skeleton 101. The function of the second extension tube 112 is to extend the vertical structural tube at the upper end of the skeleton 101. Connecting end 106 is also hinged to the side wall of the second extension tube 112. The two ends of safety tube 103 are threaded onto the connecting end 106 on connector 108 and the connecting end 106 on the second extension tube 112, respectively. For larger coal piles, additional... For the large device, firstly, the first extension tube 111 is installed at both ends of the frame 101, then the second extension tube 112 is installed on the frame 101, and finally the upper end of the safety tube 103 is screwed into the connecting end 106 on the side wall of the second extension tube 112. A threaded sleeve 110 is installed on the thread at the lower end of the safety tube 103. When it rotates, it can extend and retract at the lower end of the safety tube 103. Rotating the threaded sleeve 110 connects it to the safety tube 103 and simultaneously enters the connecting end 106 at the upper end of the first extension tube 111, thus achieving the connection between the lower end of the safety tube 103 and the connecting end 106.

[0028] The device's specifications are increased by setting up a first extension pipe 111 and a second extension pipe 112, making it suitable for larger coal piles.

[0029] Third embodiment:

[0030] like Figures 1-2 As shown, the frame 101 is also provided with a connecting end 106. The two ends of the diagonal brace 102 are respectively threaded onto the connecting end 106. The structure of the lower end of the diagonal brace 102 is the same as the structure of the lower end of the safety tube 103 in the second embodiment. A threaded sleeve 110 is provided at the lower end of the diagonal brace 102. The connection method between the threaded sleeve 110 and the connecting end 106 is also the same as the connection method between the safety tube 103 and the first extension tube 111 in the second embodiment.

[0031] The device can be installed on-site and disassembled and stored after use by threading the diagonal brace 102 to the frame 101, which reduces site occupation and facilitates device transportation.

[0032] Fourth embodiment:

[0033] like Figure 2 As shown, a condenser tube 109 is installed on the diagonal brace 102. The condenser tube 109 is made of thin-walled steel pipe with openings at both ends. One end is connected to a water pump, and the other end is a water outlet. The heat generated by the oxidation reaction inside the coal pile is transferred to the condenser tube 109, which then transfers the heat to the cold water flowing inside it, thereby releasing the heat inside the coal pile and reducing the temperature inside the coal pile. The condenser tube 109 is S-shaped, and the contact area between the coal pile and the condenser tube 109 is larger, thus resulting in higher thermal conductivity.

[0034] Fifth embodiment:

[0035] like Figures 1-2 As shown, the safety tube 103 is also provided with an observation port 105. The observation port 105 is located at the upper end of the feed inlet 104. The observation port 105 is connected to a conduit. Water enters the safety tube 103 from the feed inlet 104 and flows from bottom to top in the safety tube 103 to the observation port 105. When the water flows out of the observation port 105 into the conduit, it can be determined that the safety tube 103 is full of water.

[0036] Sixth embodiment:

[0037] To detect the temperature in the coal pile, a temperature detector is installed inside the frame 101. The temperature detector is a temperature sensor in the prior art, which can detect the ambient temperature for a long time. The sensor part is installed inside the frame 101 to prevent damage from coal impacts. For example, a TW80 wireless temperature sensor can be used.

[0038] Working principle: The device is placed on the ground of the stockpile site. Then, the coal truck dumps the mined coal onto the device. The feed port 104 on the safety pipe 103 is connected to an external high-pressure water pump. After the coal pile is stored for a certain period of time, the internal temperature rises. At this time, the water pump is turned on, and the water pump delivers water from the feed port 104 into the safety pipe 103 and from the bottom of the safety pipe 103 to the upper opening. During this process, the water flows out from the through hole at the lower end of the safety pipe 103. The water drips onto the surface of the coal and flows down along the gaps between the coal blocks, thus wetting the inside of the coal layer. In addition, carbon dioxide gas can also be introduced from the feed port 104. The carbon dioxide also exits from the through hole at the lower end of the safety pipe 103. The density of carbon dioxide gas is greater than that of air. After exiting from the safety pipe 103, it squeezes out the hot air in the gaps between the coal blocks, thereby retarding the flame.

[0039] The above embodiments are merely one of the preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but solve the same technical problem as this utility model, should be included within the scope of protection of this utility model.

Claims

1. A device for preventing spontaneous combustion of coal seams, characterised in that, Include: Skeleton (101), the skeleton (101) is inverted T-shaped, the skeleton (101) is installed on the inclined brace (102), the skeleton (101) and inclined brace (102) constitute a triangular structure, the skeleton (101) is installed on the safety tube (103), the safety tube (103) is hollow inside, the safety tube (103) side wall is equipped with feed inlet (104), the lower end of safety tube (103) is equipped with a plurality of through holes, the skeleton (101) one side is equipped with longitudinal pipe (107), two skeleton (101) are connected through longitudinal pipe (107).

2. The device for preventing and treating coal spontaneous combustion according to claim 1, characterized in that, The skeleton (101) both sides are equipped with first extension tube (111), the first extension tube (111) is screwed with skeleton (101) through connector (108), the connector (108) upper end is equipped with connecting end (106), the skeleton (101) upper end is screwed with second extension tube (112), the second extension tube (112) side wall is also equipped with connecting end (106), the safety tube (103) both ends are screwed on the connecting end (106) on the connector (108) and the connecting end (106) on the second extension tube (112).

3. The device for preventing and treating coal spontaneous combustion according to claim 2, characterized in that, The skeleton (101) is also equipped with connecting end (106), the both ends of the inclined brace (102) are screwed on the connecting end (106).

4. The device for preventing and treating coal spontaneous combustion according to claim 3, characterized in that, The inclined brace (102) is installed on the condenser tube (109), the condenser tube (109) is S-shaped distribution.

5. The device for preventing and treating coal spontaneous combustion according to claim 1, characterized in that, The safety tube (103) is also equipped with observation port (105), the observation port (105) is located on the upper end of feed inlet (104).

6. The device for preventing and treating coal spontaneous combustion according to claim 1, characterized in that, The skeleton (101) is installed with temperature detector.

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