Ventilation system capable of reducing gas concentration

Abstract

The utility model discloses a ventilation system capable of reducing gas concentration. The ventilation system comprises a first gas channel, a second gas channel, a branch pipe and a gas absorbent spraying system. According to the utility model, the first air passage and the second air passage are designed, so that air inside and outside the roadway can circularly flow, and when the gas concentration in the roadway is relatively high, one part of the second air passage and the branch pipe form internal circulation of roadway gas; meanwhile, the gas absorbent spraying system sprays vaporific gas absorbent at the second gas outlet end of the branch pipe, gas in the roadway is efficiently and rapidly absorbed, fresh air can be continuously conveyed into the roadway through the first gas channel without being affected, and the oxygen concentration in the roadway is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation for underground coal mining, in particular to a ventilation system capable of reducing gas concentration. Background Art

[0002] During the coal mining process, many tunnels will be built for the transportation of personnel and goods. The interior of the tunnel is relatively closed, so a ventilation system must be built to maintain the oxygen content in the air in the tunnel and reduce the concentration of gas.

[0003] The oxygen consumption inside the tunnel is basically stable, and ventilation components of corresponding quantity and power can be set. However, the gas concentration is an unstable data and needs to be adjusted according to the actual monitoring data. The traditional ventilation system only achieves ventilation by exchanging fresh air with the outside world, which is not conducive to quickly reducing the gas concentration when the gas concentration is abnormal, thereby ensuring the safety of personnel in the underground tunnel. For this reason, the utility model provides a ventilation system that can reduce the gas concentration. Summary of the invention

[0004] In order to solve the above shortcomings and deficiencies of the prior art, the purpose of the utility model is to provide a ventilation system capable of reducing gas concentration.

[0005] The technical solution of the utility model is:

[0006] A ventilation system capable of reducing gas concentration, comprising:

[0007] a first air duct, wherein an air inlet of the first air duct is located outside the tunnel, a first air outlet of the first air duct is located inside the tunnel, and a first fan group is installed on the first air duct;

[0008] a second air duct, wherein an air outlet of the second air duct is located outside the lane, an air inlet end of the second air duct is located inside the lane, and a second fan group is installed on the second air duct;

[0009] A branch pipe, the air outlet of the second fan group is connected to a three-way valve, the second interface of the three-way valve is connected to the second airway, the third interface of the three-way valve is connected to the air inlet of the branch pipe, and the second air outlet end of the branch pipe is located inside the lane;

[0010] A gas absorbent spraying system, wherein the spraying port of the gas absorbent spraying system is located at the second gas outlet end of the branch pipe.

[0011] Preferably, the gas absorbent spraying system comprises: a gas absorbent storage tank, a pump body, and a nozzle. The pump body is installed on the gas absorbent storage tank. The liquid outlet of the pump body is connected to the nozzle through a liquid delivery pipe. A solenoid valve is provided on the liquid delivery pipe.

[0012] Preferably, it also includes: a gas concentration monitoring module and a controller. The gas concentration monitoring module is arranged inside the tunnel and is used to obtain the gas concentration inside the tunnel. The three-way valve is an electromagnetic three-way valve. The gas concentration monitoring module, the electromagnetic valve and the three-way valve are all electrically connected to the controller.

[0013] Preferably, it also includes: a ventilation box, the ventilation box has an air inlet box and an air outlet box, the air inlet of the first air duct is connected to the air inlet box, and the air outlet of the second air duct is connected to the air outlet box.

[0014] Preferably, the ventilation box comprises:

[0015] A main shell, wherein a partition plate is fixedly connected to the interior of the main shell, and the partition plate divides the interior of the main shell into an air inlet box and an air outlet box which are not connected. An air inlet mesh hole connected to the air inlet box is provided on the side of the main shell, and a plurality of first filter plates in a vertical state are arranged inside the air inlet box. An opening is arranged on the top of the air inlet box, and an upper cover is installed. A spoiler is fixedly connected to the interior of the air outlet box, and a third filter plate and a second filter plate are fixedly connected to the upper and lower parts of the spoiler respectively. An air outlet mesh hole connected to the air outlet box is provided on the top of the main shell, and the side of the air outlet box is opened and a side cover is installed.

[0016] The bottom of the main shell is provided with a first interface communicating with the air inlet box and a second interface communicating with the air outlet box.

[0017] Preferably, a gap is provided between the right side of the spoiler and the side cover.

[0018] Preferably, the third filter plate and the second filter plate are both mesh particle catchers.

[0019] Preferably, the first airway and the second airway are of the same number, and the branch pipe is provided in plurality, and the number of the branch pipe is less than the number of the second airway.

[0020] The beneficial effects of the utility model are: compared with the prior art,

[0021] 1. By designing the first air duct and the second air duct, the air inside and outside the tunnel can circulate. When the gas concentration in the tunnel is high, a part of the second air duct and the branch pipe form an internal circulation of the tunnel gas. At the same time, the gas absorbent spraying system sprays a mist of gas absorbent at the second air outlet end of the branch pipe to achieve efficient and rapid absorption of the gas in the tunnel. The first air duct can continue to transport fresh air into the tunnel without being affected to ensure the oxygen concentration in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional view of the utility model;

[0023] Figure 2 It is a three-dimensional schematic diagram of the external ventilation box of the utility model;

[0024] Figure 3 It is a schematic diagram of the interior of the external ventilation box of the utility model.

[0025] Legend:

[0026] 1. Ventilation box; 101. Air inlet box; 102. Air outlet box; 103. Main shell; 104. Partition plate; 105. First filter plate; 106. Air inlet mesh; 107. Upper cover; 108. Spoiler; 109. Side cover; 1010. Second filter plate; 1011. Third filter plate; 1012. Air outlet mesh; 2. First air duct; 3. First fan group; 4. First air outlet end; 5. Second air duct; 6. Second fan group; 7. Air inlet end; 8. Branch pipe; 9. Second air outlet end; 10. Gas absorbent storage tank; 11. Pump body; 12. Solenoid valve; 13. Nozzle; 14. Controller; 15. Gas concentration monitoring module; 16. Three-way valve. DETAILED DESCRIPTION

[0027] The utility model is further introduced below in conjunction with the accompanying drawings and specific embodiments:

[0028] refer to Figures 1 to 3 A ventilation system capable of reducing gas concentration comprises: a first air duct 2, a second air duct 5, a branch pipe 8 and a gas absorbent spraying system.

[0029] Among them, the first air duct 2 is used to transport fresh air from the outside of the alley to the inside of the alley. Specifically, the air inlet of the first air duct 2 is located outside the alley, the first air outlet 4 of the first air duct 2 is located inside the alley, and a first fan group 3 is installed on the first air duct 2, and the first fan group 3 is used to drive the airflow inside the first air duct 2.

[0030] The second air duct 5 is used to transport the air inside the alley to the outside, and works together with the first air duct 2 to realize the exchange of gas inside and outside the alley. Specifically, the air outlet of the second air duct 5 is located outside the alley, and the air inlet end 7 of the second air duct 5 is located inside the alley. The second air duct 5 is installed with a second fan group 6, and the second fan group 6 is used to drive the airflow inside the second air duct 5.

[0031] The air outlet of the second fan group 6 is connected to the three-way valve 16, that is, the first interface of the three-way valve 16 is connected to the air outlet of the second fan group 6, the second interface of the three-way valve 16 is connected to the second air duct 5, and the third interface of the three-way valve 16 is connected to the air inlet of the branch pipe 8. The second air outlet end 9 of the branch pipe 8 is located inside the alley.

[0032] When the three-way valve 16 is in the first state, the first interface of the three-way valve 16 is connected to the second interface, and the first interface of the three-way valve 16 is closed to the third interface. At this time, no airflow is generated inside the branch pipe 8.

[0033] When the three-way valve 16 is in the second state, the first interface and the second interface of the three-way valve 16 are closed, and the first interface and the third interface of the three-way valve 16 are connected, so that the branch pipe 8 and a part of the second air duct 5 constitute the air circulation in the tunnel, and the nozzle of the gas absorbent spraying system is located at the second air outlet end 9 of the branch pipe 8. When the air circulates in the above-mentioned tunnel, the nozzle of the gas absorbent spraying system dispenses a mist of gas absorbent, which flows in the tunnel together with the gas coming out of the second air outlet end 9, thereby being able to quickly reduce the gas concentration inside the tunnel.

[0034] In one embodiment, the gas absorbent spraying system includes: a gas absorbent storage tank 10, a pump body 11, and a nozzle 13. The pump body 11 is installed on the gas absorbent storage tank 10. The liquid outlet of the pump body 11 is connected to the nozzle 13 through a liquid delivery pipe, and a solenoid valve 12 is provided on the liquid delivery pipe.

[0035] The pump body 11 works to deliver the gas absorbent stored in the gas absorbent storage tank 10 to the nozzle 13 through the liquid delivery pipe, and the gas absorbent is sprayed out from the nozzle 13 without atomization. The electromagnetic valve 12 is used to control the cutoff and connection of the liquid delivery pipe.

[0036] In one embodiment, it also includes: a gas concentration monitoring module 15 and a controller 14. The gas concentration monitoring module 15 is arranged inside the tunnel to obtain the gas concentration inside the tunnel. The three-way valve 16 is an electromagnetic three-way valve. The gas concentration monitoring module 15, the electromagnetic valve 12, and the three-way valve 16 are all electrically connected to the controller 14.

[0037] The gas concentration monitoring module 15 monitors the gas concentration in the tunnel and transmits the gas concentration signal (electrical signal) to the controller 14. After making a judgment, the controller 14 controls whether the solenoid valve 12 and the three-way valve 16 are opened.

[0038] For example, when the gas concentration monitoring module 15 detects that the gas concentration is greater than 10 m 3 / t, the controller controls the solenoid valve 12 to open, and the three-way valve 16 is in the second state.

[0039] In one embodiment, it also includes: a ventilation box 1, the ventilation box 1 has an air inlet box 101 and an air outlet box 102, the air inlet of the first air duct 2 is connected to the air inlet box 101, and the air outlet of the second air duct 5 is connected to the air outlet box 102.

[0040] The ventilation box 1 is arranged on the ground, and filter modules are arranged inside the air inlet box 101 and the air outlet box 102 .

[0041] Specifically, the ventilation box 1 includes: a main shell 103, the interior of the main shell 103 is fixedly connected with a partition plate 104, the partition plate 104 divides the interior of the main shell 103 into an air inlet box 101 and an air outlet box 102 which are not connected, the side of the main shell 103 is provided with an air inlet mesh 106 connected with the air inlet box 101, the interior of the air inlet box 101 is provided with a plurality of first filter plates 105 in a vertical state, the top of the air inlet box 101 is provided with an opening, and an upper The main shell 103 has a cover 107, and the inside of the air outlet box 102 is fixedly connected with a spoiler 108, and the upper and lower parts of the spoiler 108 are respectively fixedly connected with a third filter plate 1011 and a second filter plate 1010. The top of the main shell 103 is provided with an air outlet mesh hole 1012 connected with the air outlet box 102, the side of the air outlet box 102 is opened, and a side cover 109 is installed. The bottom of the main shell 103 is provided with a first interface connected with the air inlet box 101 and a second interface connected with the air outlet box 102.

[0042] At the air inlet box 101 , external gas enters the interior of the air inlet box 101 through the air inlet mesh 106 , and then flows downward from the first interface connected to the air inlet box 101 after being filtered by the first filter plate 105 .

[0043] At the air outlet box 102 , the air flow flows into the interior of the air outlet box 102 from the second interface connected to the air outlet box 102 , and then flows upward from the air outlet mesh 1012 after passing through the second filter plate 1010 and the third filter plate 1011 .

[0044] In one embodiment, a space is provided between the right side of the spoiler 108 and the side cover 109 , so that a horizontal U-shaped channel is formed inside the air outlet box 102 .

[0045] In one embodiment, the third filter plate 1011 and the second filter plate 1010 are both mesh particle traps for capturing particles in the airflow to avoid air pollution.

[0046] In one embodiment, the first air passage 2 and the second air passage 5 are of the same number, and a plurality of branch pipes 8 are provided, and the number of branch pipes 8 is less than the number of the second air passage 5 .

[0047] The number of the first air passage 2 and the second air passage 5 is appropriately set according to the amount of air in the tunnel, and the second air passage 5 is correspondingly set at the location where abnormal gas concentration is likely to occur.

[0048] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A ventilation system capable of reducing gas concentration, characterized in that: include: A first air duct (2), wherein an air inlet of the first air duct (2) is located outside the tunnel, a first air outlet (4) of the first air duct (2) is located inside the tunnel, and a first fan group (3) is installed on the first air duct (2); A second air duct (5), wherein an air outlet of the second air duct (5) is located outside the tunnel, an air inlet end (7) of the second air duct (5) is located inside the tunnel, and a second fan group (6) is installed on the second air duct (5); A branch pipe (8), the air outlet of the second fan group (6) is connected to a three-way valve (16), the second interface of the three-way valve (16) is connected to the second air channel (5), the third interface of the three-way valve (16) is connected to the air inlet of the branch pipe (8), and the second air outlet end (9) of the branch pipe (8) is located inside the lane; A gas absorbent spraying system, wherein the spraying port of the gas absorbent spraying system is located at the second gas outlet end (9) of the branch pipe (8).

2. The ventilation system capable of reducing gas concentration according to claim 1, characterized in that: The gas absorbent spraying system comprises: a gas absorbent storage tank (10), a pump body (11), and a spray head (13); the pump body (11) is installed on the gas absorbent storage tank (10); a liquid outlet of the pump body (11) is connected to the spray head (13) via a liquid delivery pipe; and a solenoid valve (12) is provided on the liquid delivery pipe.

3. The ventilation system capable of reducing gas concentration according to claim 2, characterized in that: Also includes: A gas concentration monitoring module (15) and a controller (14), wherein the gas concentration monitoring module (15) is arranged inside the tunnel and is used to obtain the gas concentration inside the tunnel, and the three-way valve (16) is an electromagnetic three-way valve, and the gas concentration monitoring module (15), the electromagnetic valve (12), and the three-way valve (16) are all electrically connected to the controller (14).

4. The ventilation system capable of reducing gas concentration according to claim 1, characterized in that: Also includes: A ventilation box (1), the ventilation box (1) having an air inlet box (101) and an air outlet box (102), the air inlet of the first air channel (2) being connected to the air inlet box (101), and the air outlet of the second air channel (5) being connected to the air outlet box (102).

5. The ventilation system capable of reducing gas concentration according to claim 4, characterized in that: The ventilation box (1) comprises: A main shell (103), wherein a partition plate (104) is fixedly connected to the interior of the main shell (103), wherein the partition plate (104) divides the interior of the main shell (103) into an air intake box (101) and an air outlet box (102) which are not connected, wherein an air intake mesh hole (106) communicating with the air intake box (101) is provided on the side of the main shell (103), wherein a plurality of first filter plates (105) in a vertical state are arranged inside the air intake box (101), wherein the air intake box (101) The top of the main housing (101) is provided with an opening and is installed with an upper cover (107); a spoiler (108) is fixedly connected to the inside of the air outlet box (102); a third filter plate (1011) and a second filter plate (1010) are fixedly connected above and below the spoiler (108), respectively; an air outlet mesh hole (1012) communicating with the air outlet box (102) is opened on the top of the main housing (103); the side of the air outlet box (102) is opened and is installed with a side cover (109); The bottom of the main housing (103) is provided with a first interface communicating with the air inlet box (101) and a second interface communicating with the air outlet box (102).

6. The ventilation system capable of reducing gas concentration according to claim 1, characterized in that: A gap is provided between the right side of the spoiler (108) and the side cover (109).

7. The ventilation system capable of reducing gas concentration according to claim 5, characterized in that: The third filter plate (1011) and the second filter plate (1010) are both mesh particle traps.

8. The ventilation system capable of reducing gas concentration according to claim 1, characterized in that: The first air channel (2) and the second air channel (5) are provided in a plurality of the same number, and the branch pipes (8) are provided in a plurality, and the number of the branch pipes (8) is less than the number of the second air channels (5).

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