Gas purification device for tunnel

Abstract

The utility model relates to the technical field of gas purification, in particular to a gas purification device for a tunnel, which comprises a gas adsorption device and a spraying device. According to the utility model, the gas concentration on the tunneling working face can be reduced through the gas adsorption device and the spraying device, so that the construction progress is accelerated, and the construction safety is ensured. The whole structure is simple, and disassembly, assembly and operation are convenient. The filter screens are installed through the clamping grooves and can be popped up to be replaced conveniently, and time and labor cost are saved. When the gas concentration of a tunneling face is reduced, the device can replace an air blower. Secondly, when the gas is suddenly sprayed out and the concentration of the gas is increased at a high speed, the spraying device and the gas adsorption device work simultaneously, and safe evacuation of personnel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas purification, in particular to a gas purification device for a tunnel. Background Art

[0002] With the continuous advancement and improvement of national high-speed rail projects, the excavation of high-speed rail tunnels in high-altitude areas of my country is gradually being carried out. However, there are various difficulties in the tunnel excavation process. Among them, the gas that escapes or suddenly gushes from the rock during the excavation process will not only delay the construction progress, but also pose a threat to the property and life safety of the construction company and its personnel. Therefore, how to safely and efficiently deal with the gas at the excavation face is imminent.

[0003] The existing method for dealing with gas enriched on the excavation face during tunnel excavation is to place a high-speed blower at the tunnel entrance and extend the pipeline to the excavation face to blow the gas out of the tunnel. However, this method has the following two disadvantages: first, since the tunnel excavation face is usually several kilometers or even more than ten kilometers away from the tunnel entrance, the energy cost consumed by the blower is very high; second, part of the gas blown out from the excavation face will be blown back to the excavation face by the blower. This method is not only inefficient but also consumes a lot of energy, which is neither practical nor economical. Utility Model Content

[0004] The purpose of the present application is to provide a gas purification device for tunnels, aiming to solve the above-mentioned problems in the prior art.

[0005] The present application provides a gas purification device for a tunnel, including a gas adsorption device and a spray device, wherein the gas adsorption device includes an air suction device, a primary filter screen is connected to the downstream of the air suction device, a final filter screen is connected to the downstream of the primary filter screen, and the primary filter screen and the final filter screen are connected to a box pipe through a card slot; the air suction device is located in the box pipe, an electric control box and a touch screen are fixedly connected above the box pipe, the upstream and downstream of the box pipe are both connected to connecting pipes, and each of the upstream and downstream connecting pipes is fixedly connected with a a first gas concentration detector; the head end of the connecting pipe upstream of the box pipe is connected to an air inlet, and a dust filter is connected to the connection between the air inlet and the connecting pipe through a slot; the end of the connecting pipe downstream of the box pipe is fixedly connected to an air outlet; the spray device includes a liquid pump, which is located in a liquid tank, a spray pipe is fixedly connected to the liquid tank, a spray head is installed on the spray pipe, one of the spray heads is installed with a second gas concentration detector, and the second gas concentration detector is wirelessly connected to the CPU in the electric control box.

[0006] Furthermore, the touch display screen is electrically connected to the CPU in the electric control box.

[0007] Furthermore, the first gas concentration detector is respectively installed between the air intake device and the dust filter and between the final filter and the air outlet, and the first gas concentration detector is electrically connected to the CPU in the electric control box.

[0008] Furthermore, the three slots for installing the dust filter, the primary physical filter and the final physical filter are all provided with a pop-up device, and the pop-up device is electrically connected to the CPU in the electric control box.

[0009] Furthermore, the liquid pump is wirelessly connected to the CPU in the electric control box.

[0010] The beneficial effects of the utility model are as follows: the utility model can reduce the gas concentration on the tunnel excavation working face through the spray device and the gas adsorption device, thereby speeding up the construction progress and ensuring the construction safety. The overall structure is simple, easy to disassemble and assemble, and easy to operate. Each filter is installed through a card slot and can be popped out for easy replacement, saving time and labor costs. When reducing the gas concentration on the excavation face, the utility model can replace the blower. Secondly, when the gas is suddenly ejected and its concentration rises rapidly, the spray device and the gas adsorption device work simultaneously to ensure the safe evacuation of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the gas adsorption device of the utility model.

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the spray device of the utility model.

[0013] In the figure:

[0014] 1- air suction device; 2- primary filter; 3- final filter; 4- box pipe; 5- electric control box; 6- touch screen; 7- connecting pipe; 8- first gas concentration detector; 9- air inlet; 10- dust filter; 11- air outlet; 12- pop-up device; 13- liquid pump; 14- liquid tank; 15- spray pipe; 16- spray head; 17- second gas concentration detector. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] like Figure 1 and Figure 2A gas purification device for a tunnel shown in the figure comprises a gas adsorption device and a spray device, wherein the gas adsorption device comprises an air suction device 1, wherein a primary filter 2 is connected to the downstream of the air suction device 1, wherein a final filter 3 is connected to the downstream of the primary filter 2, wherein the primary filter 2 and the final filter 3 are connected to a box pipe 4 through a card slot; the air suction device 1 is located in the box pipe 4, wherein an electric control box 5 and a touch screen 6 are fixedly connected above the box pipe 4, wherein connecting pipes 7 are connected to the upstream and downstream of the box pipe 4, wherein a first gas concentration detector 8 is fixedly connected to each of the connecting pipes 7 upstream and downstream of the box pipe 4; wherein an air inlet 9 is connected to the head end of the connecting pipe 7 upstream of the box pipe 4, wherein a dust filter 10 is connected to the connection between the air inlet 9 and the connecting pipe 7 through a card slot; and an air outlet 11 is fixedly connected to the end of the connecting pipe 7 downstream of the box pipe 4. The spray device includes a liquid pump 13, which is located in a liquid tank 14. A spray pipe 15 is fixedly connected to the liquid tank 14, and a spray head 16 is installed on the spray pipe 15. A second gas concentration detector 17 is installed on one of the spray heads 16, and the second gas concentration detector 17 is wirelessly connected to the CPU in the electric control box 5.

[0017] The touch screen 6 is electrically connected to the CPU in the electric control box 5 .

[0018] The first gas concentration detector 8 is respectively installed between the air intake device 1 and the dust filter 10 and between the final filter 3 and the air outlet 11 , and the first gas concentration detector 8 is electrically connected to the CPU in the electric control box 5 .

[0019] The three slots for installing the dust filter 10 , the primary physical filter and the final physical filter are all provided with a pop-up device 12 , and the pop-up device 12 is electrically connected to the CPU in the electric control box 5 .

[0020] The liquid pump 13 is wirelessly connected to the CPU in the electric control box 5 .

[0021] The air intake device 1 is a high-power turbine that drives the blades to rotate to form negative pressure to inhale external air from the air inlet. Under the action of the air intake device 1, the external air first passes through the dust filter 10 to filter out sand and large dust particles, then enters the box pipe 4, passes through the primary filter 2 to further filter out small particles and absorb part of the gas, and finally passes through the final filter 3 to absorb most of the gas and is discharged through the air outlet 11.

[0022] When the difference between the gas concentration at the air inlet 9 and the gas concentration at the air outlet 11 is small and both are less than the gas concentration safety threshold, the air intake device 1 stops; when the difference between the gas concentration at the air inlet 9 and the gas concentration at the air outlet 11 is large and the concentration at the air inlet 9 is greater than the safety threshold, the air intake device 1 starts, and the fan speed depends on the difference; when the difference between the gas concentration at the air inlet 9 and the gas concentration at the air outlet 11 is small and both are greater than the safety threshold, the CPU in the electrical control box 5 sends a command to control the pop-up device 12 to replace the new dust filter 10, the primary filter 2 and the final filter 3.

[0023] When the gas concentration in the tunnel suddenly rises, the second gas concentration detector 17 sends information to the electric control box 5, and the electric control box 5 sends a command to the liquid pump 13 to extract the gas adsorbing liquid in the liquid tank 14 through the spray pipe 15 and spray it out from the spray head 16 to quickly reduce the gas concentration in the tunnel.

[0024] When gas suddenly gushes out and its concentration rises sharply, the spray device and the gas adsorption device work at the same time. In other cases, only the gas adsorption device works.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A gas purification device for a tunnel, characterized in that: It comprises a gas adsorption device and a spray device, the gas adsorption device comprises an air suction device, a primary filter is connected to the downstream of the air suction device, a final filter is connected to the downstream of the primary filter, the primary filter and the final filter are connected to the box pipe through a card slot; the air suction device is located in the box pipe, an electric control box and a touch screen are fixedly connected above the box pipe, the upstream and downstream of the box pipe are both connected to connecting pipes, and a first gas concentration detector is fixedly connected to each of the upstream and downstream connecting pipes ; The head end of the connecting pipe upstream of the box pipe is connected to an air inlet, and a dust filter is connected to the connection between the air inlet and the connecting pipe through a slot; the end of the connecting pipe downstream of the box pipe is fixedly connected to an air outlet; the spray device includes a liquid pump, which is located in the liquid tank, a spray pipe is fixedly connected to the liquid tank, and a spray head is installed on the spray pipe, one of the spray heads is installed with a second gas concentration detector, and the second gas concentration detector is wirelessly connected to the CPU in the electrical control box.

2. A tunnel gas purification device according to claim 1, characterized in that: The touch display screen is electrically connected to the CPU in the electric control box.

3. A tunnel gas purification device according to claim 1, characterized in that: The first gas concentration detector is respectively installed between the air intake device and the dust filter and between the final filter and the air outlet, and the first gas concentration detector is electrically connected to the CPU in the electric control box.

4. A tunnel gas purification device according to claim 1, characterized in that: The three card slots for installing the dust filter, the primary physical filter and the final physical filter are all provided with pop-up devices, and the pop-up devices are electrically connected to the CPU in the electric control box.

5. A tunnel gas purification device according to claim 1, characterized in that: The liquid pump is wirelessly connected to the CPU in the electric control box.

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