Gas control device based on tunnel construction

Abstract

The utility model belongs to the technical field of tunnel gas, and particularly relates to a gas control device based on tunnel construction, which comprises a main air pipe, a movable base, a lifting platform and a jet flow air bellow, the rear end of the main air pipe is connected with an exhaust pipe through threads, and the exhaust pipe is connected with a sucking pump. The front end and the rear end of the movable machine base are connected with a lifting table in a lifting mode through a hydraulic lifting rod and a hinge shaft, a set of jet flow air boxes are installed on the lifting table, a main air pipe penetrates through the jet flow air boxes, and gas extraction pipes are arranged on the periphery of the main air pipe in an inclined mode towards the exhaust port. Jet fans are arranged on the two sides of the jet bellows. The gas extraction pipes are arranged on the periphery of the main air pipe in an inclined mode, high-pressure gas is sprayed into the main air pipe through the airflow spraying openings formed in the inclined mode by means of the multiple sets of jet flow fans on the main air pipe to drive front air to rapidly flow to form strong wind, the strong wind blows air towards the outer portion of the tunnel, and gas is rapidly discharged in cooperation with the gas extraction pump. And gas is prevented from forming a gas zone in the tunnel, and construction risks are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel gas, and particularly relates to a gas control device based on tunnel construction. Background Technique

[0002] Gas is an explosive gas with methane as the main component. Its density is lighter than that of air, and it has strong diffusibility, which is 1.34 times the diffusion speed of air. Gas exists in the coal body or surrounding rock in a free state and an adsorbed state. The free-state gas exists in the cracks and pores of the coal body or surrounding rock in a free gas state and is easy to flow.

[0003] During tunnel construction, free gas often surges into the tunnel. Therefore, a gas control device is needed to timely discharge the gas from the tunnel to ensure safety. The gas control device generally evenly arranges air ducts in the tunnel and keeps the inside of the air ducts in a negative pressure state through an air pump, so as to timely extract the gas when the gas surges into the tunnel.

[0004] After retrieval, Chinese Patent Publication No. CN216198253U discloses a gas control device based on tunnel construction; including a main air duct, gas extraction mechanisms are arranged on both sides of the main air duct, an outer protective shell is sleeved outside the main air duct, and a spraying mechanism is arranged at the bottom end of the main air duct; the gas extraction mechanism includes a corrugated pipe and a bent pipe, one end of the corrugated pipe is fixedly connected to the bent pipe, the other end of the corrugated pipe is fixedly connected to the main air duct, and the corrugated pipe is communicated with the main air duct; a suction pump is connected to one end of the main air duct, and a discharge pipe is connected to the suction pump. The suction pump is used to extract the gas in the main air duct, the corrugated pipe and the bent pipe, so that a negative pressure state can be maintained inside, and the discharge pipe is used to discharge the gas.

[0005] The above gas control device has the following problems in the use process:

[0006] 1. The angle between the main air duct and the bent pipe designed in the gas discharge construction structure is perpendicular. A suction pump is connected to the rear end of the main air duct, and only the suction pump at the rear end cannot form a strong air flow for outward transportation; greatly reducing the efficiency of discharging the gas inside the tunnel to the outside of the tunnel.

[0007] 2. Since there is gas at the upper layer position inside the tunnel, the above device is not convenient for adjusting the height position inside the tunnel, and at the same time, the above device is not convenient for moving inside the tunnel, bringing great trouble to the staff. Summary of the Invention

[0008] To solve the problems raised in the above-mentioned background technology, the present utility model provides a gas control device based on tunnel construction. Gas extraction pipes are inclinedly arranged around the main air duct. Multiple groups of jet fans on the main air duct inject high-pressure gas through inclined air jet ports to drive the air in front to flow rapidly, forming a strong wind that blows towards the outside of the tunnel. In cooperation with the air extraction pump, it can quickly discharge gas, prevent the formation of a gas zone in the tunnel, avoid construction risks, and solve the problem of low air extraction efficiency of the air extraction pump.

[0009] To achieve the above object, the present utility model provides the following technical solution: A gas control device based on tunnel construction includes a main air duct. The rear end of the main air duct is connected with an exhaust pipe through a thread. The exhaust pipe is connected with an air extraction pump. It also includes a mobile base, a lifting platform, and a jet air box. Hydraulic lifting rods are used to lift and connect the front and rear ends of the mobile base to the lifting platform through hinge shafts. A group of jet air boxes are installed on the lifting platform. The main air duct passes through the jet air box. Gas extraction pipes are inclinedly arranged around the main air duct towards the exhaust port; Jet fans are provided on both sides of the jet air box. An air jet port inclinedly arranged towards the exhaust port is opened on the inner wall of the connection between the main air duct and the jet air box.

[0010] As a preferred solution, several groups of gas extraction pipes are provided, and the jet air box is arranged between two adjacent groups of gas extraction pipes.

[0011] As a preferred solution, the air jet port is connected to the jet fan.

[0012] As a preferred solution, a gas sensor alarm is provided on the top of the jet air box.

[0013] As a preferred solution, the main air duct and the jet air box are driven by hydraulic lifting rods to adjust the height up and down.

[0014] As a preferred solution, driving wheels are provided at the bottom of the mobile base.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The present utility model facilitates gas control operations at different positions inside the tunnel through the driving wheels. According to the internal situation of the tunnel, the hydraulic lifting rods can be started to drive the front and rear ends of the lifting platform to rise and fall, so as to adjust the height position and inclination angle of the main air duct; it brings convenience to the operators, saving time and effort.

[0017] When the gas sensor alarm gives an alarm, the jet blower on the jet air box and the external air extraction pump are started simultaneously. The gas extraction pipes are inclined around the main air duct in the direction of the exhaust port. By arranging multiple groups of jet air boxes on the main air duct, the jet blower injects high-pressure gas through the air jet ports that are inclined in the direction of the exhaust port, driving the air in front to flow rapidly to form a strong wind, blowing towards the outside of the tunnel. Cooperating with the air extraction pump, it can disperse the gas, quickly discharge the gas inside the tunnel outside the tunnel, prevent the formation of a gas zone inside the tunnel, avoid construction risks and personal injuries to construction workers, and solve the problem of low air extraction efficiency of the air extraction pump. Description of the Drawings

[0018] Figure 1 It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0019] Figure 2 It is a schematic front view structure diagram of the present utility model;

[0020] Figure 3 It is a schematic cross-sectional view structure diagram of the longitudinal section of the present utility model.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1. Mobile base; 2. Lifting platform; 3. Hydraulic lifting rod; 4. Main air duct; 5. Jet air box; 6. Jet blower; 7. Gas extraction pipe; 8. Exhaust pipe; 9. Air extraction pump; 10. Gas sensor alarm; 11. Driving moving wheel; 21. Hinge shaft; 51. Air jet port. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1

[0025] Please refer to Figures 1 - 3, the present utility model provides the following technical solutions: A gas control device based on tunnel construction, including a main air duct 4. The rear end of the main air duct 4 is threadedly connected to an exhaust pipe 8, and the exhaust pipe 8 is connected to an air extraction pump 9. It also includes a mobile base 1, a lifting platform 2, and a jet air box 5. The front and rear ends of the mobile base 1 are connected to the lifting platform 2 through hydraulic lifting rods 3 via hinge shafts 21 for lifting. A group of jet air boxes 5 are installed on the lifting platform 2. The main air duct 4 passes through the jet air box 5, and gas extraction pipes 7 are inclined around the main air duct 4 towards the exhaust port direction; Jet fans 6 are provided on both sides of the jet air box 5, and an air flow jet port 51 inclined towards the exhaust port direction is opened on the inner wall of the connection between the main air duct 4 and the jet air box 5; In the embodiment, when the gas sensor alarm 10 alarms, the jet fans 6 on the jet air box 5 and the external air extraction pump 9 are started to work simultaneously. The air extraction pump 9 extracts the gas in the main air duct 4; The gas extraction pipes 7 are inclined around the main air duct 4 towards the exhaust port direction. By arranging multiple groups of jet air boxes 5 on the main air duct 4, through the jet fans 6 via the air flow jet port 51 inclined towards the exhaust port direction; Inject high-pressure gas to drive the air in front to flow rapidly to form a strong wind, blowing towards the outside of the tunnel, achieving the effect of dispersing gas; Realize quickly discharging the gas inside the tunnel outside the tunnel, preventing the gas from forming a gas zone inside the tunnel, avoiding the generation of construction risks and causing personal injuries to construction workers, and solving the problem of low air extraction efficiency of the air extraction pump.

[0026] In this embodiment, several groups of the gas extraction pipes 7 are provided, and the jet air boxes 5 are arranged between two adjacent groups of gas extraction pipes 7; A detachable filter screen is provided inside the end of the gas extraction pipe 7.

[0027] In this embodiment, the air flow jet port 51 is connected to the jet fan 6.

[0028] In this embodiment, a gas sensor alarm 10 is provided on the top of the jet air box 5.

[0029] In this embodiment, the main air duct 4 and the jet air box 5 are driven by the hydraulic lifting rods 3 to adjust the height up and down; According to the internal situation of the tunnel, the hydraulic lifting rods 3 can be started to drive the front and rear ends of the lifting platform 2 to rise and fall, so as to adjust the height position and inclination angle of the main air duct 4; It brings convenience to the operators, saving time and effort.

[0030] In this embodiment, driving wheels 11 are provided at the bottom of the mobile base 1; It is convenient to move this device inside the tunnel through the driving wheels 11, facilitating the gas control operation at different positions inside the tunnel.

[0031] Working principle and use process of the utility model: When the utility model is in use, the staff can drive the moving wheel 11 to move the device inside the tunnel, which is convenient for gas control operations at different positions inside the tunnel. The hydraulic lifting rod 3 can also be started according to the internal conditions of the tunnel to drive the front and rear ends of the lifting platform 2 to rise and fall, so that the height position and the inclination angle of the main air duct 4 can be adjusted, which brings convenience to the operator and saves time and effort.

[0032] When the gas sensor alarm 10 sounds an alarm, the jet fan 6 on the jet bellows 5 and the external vacuum pump 9 are started at the same time, and the vacuum pump 9 extracts the gas in the main air duct 4; the gas extraction pipe 7 is arranged obliquely toward the exhaust port on the four sides of the main air duct 4, and multiple groups of jet bellows 5 are arranged on the main air duct 4, and the air flow injection port 51 is arranged obliquely toward the exhaust port through the jet fan 6; high-pressure gas is sprayed, which drives the front air to flow rapidly to form a strong wind, and blows toward the outside of the tunnel to achieve the effect of dispersing the gas; the gas inside the tunnel is quickly discharged out of the tunnel, preventing the gas from forming a gas belt in the tunnel, avoiding construction risks and causing life injuries to construction personnel, and solving the problem of low vacuum pump efficiency.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A gas control device based on tunnel construction, comprising a main air duct (4), the rear end of the main air duct (4) is threadedly connected with an exhaust pipe (8), the exhaust pipe (8) is connected with an air extraction pump (9), and it is characterized in that: It also includes a mobile base (1), a lifting platform (2) and a jet air box (5). The front and rear ends of the mobile base (1) are connected to the lifting platform (2) through hydraulic lifting rods (3) via a hinge shaft (21) for lifting. A group of jet air boxes (5) are installed on the lifting platform (2). The main air duct (4) passes through the jet air box (5). Gas extraction pipes (7) are arranged around the main air duct (4) and are inclined towards the exhaust port; Jet fans (6) are provided on both sides of the jet air box (5). An air flow injection port (51) which is inclined towards the exhaust port is provided on the inner wall of the connection between the main air duct (4) and the jet air box (5).

2. The gas control device based on tunnel construction according to claim 1, characterized in that: A number of groups of the gas extraction pipes (7) are provided, and the jet air box (5) is arranged between two adjacent groups of the gas extraction pipes (7).

3. The gas control device based on tunnel construction according to claim 1, wherein: The air flow injection port (51) is connected to the jet fan (6).

4. The gas control device based on tunnel construction according to claim 1, wherein: A gas sensing alarm (10) is provided on the top of the jet air box (5).

5. The gas control device based on tunnel construction according to claim 1, characterized in that: The main air duct (4) and the jet air box (5) are driven by the hydraulic lifting rod (3) to adjust the height up and down.

6. The gas control device based on tunnel construction according to claim 1, characterized in that: Drive wheels (11) are provided at the bottom of the mobile base (1).

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