Automatic circulation high-pressure dust falling system for small-section long tunnel

Abstract

The utility model discloses a small-section long tunnel automatic circulation high-pressure dust fall system, which belongs to the technical field of tunnel dust fall, and comprises an air inlet assembly, an air outlet assembly and a dust fall assembly, the air inlet assembly is fixed on one side of a tunnel, the air inlet assembly comprises an air inlet pipe and a press-in type axial flow fan, and the air outlet assembly is fixed on the other side of the tunnel. The air inlet assembly is located on one side of the tunnel, the air outlet assembly is located on the other side of the tunnel and comprises an air outlet pipe and a jet fan, the dust falling assembly comprises an annular spray pipe frame, a high-pressure water pump and a water tank, the annular spray pipe frame is erected on the two sides of the air inlet pipe and the air outlet pipe, one end of the annular spray pipe frame is connected with the high-pressure water pump, and the other end of the annular spray pipe frame is connected with the jet fan. The other end of the high-pressure water pump is connected with the water tank, and the water tank is used for collecting seepage water of the tunnel. A palm working face in the long tunnel is ventilated through the ventilation assembly and natural ventilation, meanwhile, water seepage of the tunnel is utilized by the dust falling assembly, spraying dust falling treatment is conducted through the high-pressure water pump and the annular spraying pipe frame, and ventilation and smoke exhaust of the tunnel are accelerated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of tunnel dust fall, especially relates to a small section long tunnel automatic circulation high pressure dust fall system. BACKGROUND

[0002] Ventilation in tunnel construction mainly includes natural ventilation and mechanical ventilation. Natural ventilation utilizes the air pressure difference between inside and outside of the tunnel to ventilate, which is suitable for short tunnels. However, for small section long tunnels, due to the unique bottleneck effect, natural ventilation is not conducive to smoke exhaust. Mechanical ventilation mainly includes pressure-in ventilation, which ventilates through a long flexible air pipe connected to the tunnel face, and can quickly remove the dirty air at the working face. However, the dirty air flows through the whole tunnel, and it is not possible to collect the dirty air.

[0003] In addition to the above ventilation, dust removal equipment is also needed to treat the dust in the air at the construction site. A dust fall spray gun is usually used for dust fall. However, the dust fall equipment is large in size, which affects construction and is not convenient to arrange in a small section long tunnel.

[0004] Therefore, there is an urgent need for a ventilation system suitable for small section long tunnels, which is simple in structure, easy to operate, can ventilate and dust fall, and ensures the safety of personnel working in a limited space. SUMMARY

[0005] The utility model aims to provide a small section long tunnel automatic circulation high pressure dust fall system to solve the problems in the background art.

[0006] The utility model is achieved by the following technical solutions:

[0007] A small section long tunnel automatic circulation high pressure dust fall system, comprising an air inlet assembly, an air outlet assembly, and a dust fall assembly. The air inlet assembly is fixed to one side of the tunnel. The air inlet assembly comprises an air inlet pipe and a pressure-in axial flow fan. The air outlet assembly is located on the other side of the tunnel. The air outlet assembly comprises an air outlet pipe and a jet flow fan. The dust fall assembly comprises a ring-shaped spray pipe rack, a high-pressure water pump, and a water tank. The ring-shaped spray pipe rack is erected on both sides of the air inlet pipe and the air outlet pipe. The ring-shaped spray pipe rack is arranged on the side of the tunnel face. One end of the ring-shaped spray pipe rack is connected to the high-pressure water pump. The other end of the high-pressure water pump is connected to the water tank. The water tank is used to collect water seepage from the tunnel.

[0008] Further, the bottom of the air inlet assembly and the air outlet assembly is provided with a support. The support is L-shaped. The support is fixed to the wall of the tunnel. The air inlet assembly is located at the top of one side of the tunnel. The air outlet assembly is located at the bottom of the other side of the tunnel. The pressure-in axial flow fan is located on the side close to the outside of the tunnel. The jet flow fan is located on the side close to the tunnel face.

[0009] Further, the annular spray pipe frame is matched with the inner contour size of the tunnel, a plurality of adjustable spray heads are arranged on the annular spray pipe frame, support rods are arranged above the air outlet pipe and the air inlet pipe, and the support rods are connected with the annular spray pipe frame through buckle connecting pieces.

[0010] Further, the air inlet pipe is provided with an adjustable hose head near one end of the tunnel face.

[0011] Further, the front end of the jet fan is provided with a filter screen and a dust collecting barrel.

[0012] The beneficial effects of the utility model are:

[0013] 1) The ventilation assembly and natural ventilation are used for ventilating the tunnel face in the long tunnel, and the dust reduction assembly utilizes the water seepage of the tunnel, sprays and reduces dust through the annular spray pipe frame by the high-pressure water pump, and the ventilation and smoke exhaust of the tunnel are accelerated. The dirty air or dust after dust reduction is discharged from the air outlet pipe by the jet fan, so that the air of the tunnel face is clean and smooth.

[0014] 2) The spray heads are arranged along a circle of the annular spray pipe frame, and the spray heads can be flexibly adjusted to ensure that the sprayed water mist can spray the tunnel face and improve the dust reduction effect. DRAWINGS

[0015] Fig. 1 It is a cross-sectional view of the utility model of a small-section long tunnel automatic circulation high-pressure dust reduction system.

[0016] Fig. 2 It is a top view of the utility model of a small-section long tunnel automatic circulation high-pressure dust reduction system.

[0017] Fig. 3 It is a buckle connecting piece in the utility model.

[0018] In the drawings, 11 is an air inlet pipe, 12 is a pressure-in type axial flow fan, 21 is an air outlet pipe, 22 is a jet fan, 31 is an annular spray pipe frame, 32 is a high-pressure water pump, 33 is a support rod, 34 is a buckle connecting piece, 35 is a spray head, and 4 is a support. DETAILED DESCRIPTION

[0019] The technical scheme of the utility model will be clearly and completely described below in combination with embodiments. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0020] Referring to Figs. 1-3 , the utility model provides a technical scheme:

[0021] As Figs. 1-3 shown, a small cross-section long tunnel automatic circulating high-pressure dust falling system, comprising an air inlet assembly, an air outlet assembly and a dust falling assembly, the air inlet assembly is fixed on one side of the tunnel, the air inlet assembly comprises an air inlet pipe 11 and a forced induction axial flow fan 12, the air outlet assembly is located on the other side of the tunnel, the air outlet assembly comprises an air outlet pipe 21 and a jet fan 22, the dust falling assembly comprises a ring-shaped spray pipe rack 31, a high-pressure water pump 32 and a water tank, the ring-shaped spray pipe rack 31 is erected on both sides of the air inlet pipe 11 and the air outlet pipe 21, one end of the ring-shaped spray pipe rack 31 is connected with the high-pressure water pump 32, the other end of the high-pressure water pump 32 is connected with the water tank, and the water tank is used to collect seepage water of the tunnel.

[0022] Through the above technical scheme, the ventilation assembly and natural ventilation are used to ventilate the working face of the tunnel, and at the same time, the dust falling assembly uses the seepage water of the tunnel, sprays and falls dust through the high-pressure water pump 32 through the ring-shaped spray pipe rack 31, and accelerates the ventilation and smoke exhaust of the tunnel. At the same time, the dirty air or dust after dust falling is discharged from the air outlet pipe 21 by the jet fan 22, so as to ensure that the air of the working face is clean and smooth.

[0023] Through the ventilation assembly, the air outlet assembly and the dust falling assembly, the required air volume of the maximum number of people working in the tunnel at the same time, or the required air volume of reducing the harmful gas generated by the maximum number of blasting explosives at the same time, or the required air volume of diluting the harmful gas generated by the internal combustion machinery working in the tunnel at the same time to the allowable concentration, or satisfying the requirement of the minimum allowable wind speed in the tunnel, etc.

[0024] At the same time, the air inlet pipe and the air outlet pipe can be flexibly connected according to the length of the tunnel, so as to adapt to the ventilation demand of the long tunnel; at the same time, since the ring-shaped spray pipe rack is erected on both sides of the ventilation pipe and the air outlet pipe, when the tunnel is excavated, the air inlet pipe and the air outlet pipe are lengthened, and then the ring-shaped spray pipe rack is moved to the front end of the working face to continue the dust falling and spraying, so as to be convenient for adjustment; at the same time, the ring-shaped spray pipe rack does not occupy the construction site, and adopts ring-shaped dust falling, so as to improve the dust falling effect.

[0025] Further, the bottom of the air inlet assembly and the air outlet assembly is provided with a support 4, the support 4 is an L-shaped structure, the support 4 is fixed on the wall of the tunnel, the air inlet assembly is located at the top of one side of the tunnel, the air outlet assembly is located at the bottom of the other side of the tunnel, the forced induction axial flow fan 12 is located on the side close to the outside of the tunnel, and the jet fan 22 is located on the side close to the working face of the tunnel.

[0026] The air inlet assembly and the air outlet assembly are erected on both sides of the tunnel through the support 4, the air inlet pipe 11 and the air outlet pipe 21 are supported stably, the pipeline is made of steel pipeline or hose, air leakage is reduced, the pressure-in type axial flow fan 12 is located on the side close to the outside of the tunnel and is used for sucking fresh air outside the tunnel into the ventilation pipeline and sending the fresh air into the tunnel face, and the jet fan 22 is used for sucking dirty air of the tunnel face into the air outlet pipe 21 and discharging the dirty air.

[0027] Further, the annular spray pipe frame 31 is matched with the inner contour size of the tunnel, a plurality of adjustable spray heads 35 are arranged on the annular spray pipe frame 31, the annular spray pipe frame 31 is located above the air outlet pipe 21 and the air inlet pipe 11 and is provided with a support rod 33, and the support rod 33 is connected with the annular spray pipe frame 31 through the buckle connecting piece 34.

[0028] Through the technical scheme, the spray heads 35 are arranged along a circle of the annular spray pipe frame 31, the spray heads 35 can be flexibly adjusted to ensure that the sprayed water mist can be sprayed to the tunnel face and the dust reduction effect is improved, the annular spray pipe frame 31 is erected on both sides of the ventilation pipeline and the air outlet pipe 21, the support rod 33 is connected with the annular spray pipe frame 31 through the buckle connecting piece 34, the support rod 33 is supported on the pipeline and kept stable, the angle of the buckle connecting piece 34 can be adjusted, the support rod 33 is connected with the support 4, and the annular spray pipe frame 31 can be prevented from pressing the pipeline.

[0029] Further, the air inlet pipe 11 is provided with an adjustable hose head at one end close to the tunnel face.

[0030] Through the technical scheme, the adjustable hose head can adjust the angle of air outlet of the air inlet pipe 11, the direction of air outlet is adjusted, ventilation and dust reduction of the tunnel face are more flexible.

[0031] Further, the front end of the jet fan 22 is provided with a filter screen and a dust collecting barrel.

[0032] Through the technical scheme, the dirty air of the tunnel face and the dust after spraying are collected and filtered, damage to the jet fan 22 is reduced.

[0033] The above is only the preferred embodiment of the utility model, it should be understood that the utility model is not limited to the form disclosed in the present application, should not be regarded as excluding other embodiments, and can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described in the present application, through the above teaching or related technical or knowledge. The changes and variations made by the person skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the protection scope of the claims attached to the utility model.

Claims

1. An automatic circulating high-pressure dust suppression system for long tunnels with small cross-sections, characterized in that: The system includes an air intake assembly, an air outlet assembly, and a dust suppression assembly. The air intake assembly is fixed on one side of the tunnel and includes an air intake pipe (11) and a forced-flow axial fan (12). The air outlet assembly is located on the other side of the tunnel and includes an air outlet pipe (21) and a jet fan (22). The dust suppression assembly includes an annular nozzle frame (31), a high-pressure water pump (32), and a water tank. The annular nozzle frame (31) is mounted on both sides of the air intake pipe (11) and the air outlet pipe (21). The annular nozzle frame (31) is placed against the tunnel face. One end of the annular nozzle frame (31) is connected to the high-pressure water pump (32), and the other end of the high-pressure water pump (32) is connected to the water tank. The water tank is used to collect seepage water from the tunnel.

2. The automatic circulating high-pressure dust suppression system for small-section long tunnels according to claim 1, characterized in that: The bottom of the air inlet assembly and the air outlet assembly are provided with a bracket (4). The bracket (4) is an L-shaped structure and is fixed to the tunnel wall. The air inlet assembly is located at the top of one side of the tunnel, and the air outlet assembly is located at the bottom of the other side of the tunnel. The forced axial flow fan (12) is located on the side near the outside of the tunnel, and the jet fan (22) is located on the side near the tunnel face.

3. The automatic circulating high-pressure dust suppression system for small-section long tunnels according to claim 1, characterized in that: The annular nozzle frame (31) is adapted to the inner contour dimensions of the tunnel. The annular nozzle frame (31) is provided with multiple adjustable nozzles (35). The annular nozzle frame (31) is provided with support rods (33) above the air outlet pipe (21) and the air inlet pipe (11). The support rods (33) are connected to the annular nozzle frame (31) through snap-fit ​​connectors (34).

4. The automatic circulating high-pressure dust suppression system for small-section long tunnels according to claim 1, characterized in that: The air inlet pipe (11) has an adjustable hose head at one end near the tunnel face.

5. The automatic circulating high-pressure dust suppression system for small-section long tunnels according to claim 1, characterized in that: The front end of the jet fan (22) is equipped with a filter screen and a dust collection bin.

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