Ventilation and dust reduction device for blasting excavation tunnel face of karst geological tunnel

Abstract

The utility model discloses a karst geology tunnel blasting excavation tunnel face ventilation and dust fall device, which comprises a working vehicle, a dust collection box, a first ring pipe and a barrel shell, a water tank and a water pump connected with the water tank are arranged on the working vehicle, the dust collection box is fixed on the working vehicle, and a suction fan is arranged on the dust collection box. A plurality of suction nozzles are arranged on the surface and the side face of the first annular pipe, a round pipe is installed on the barrel shell, a plurality of spraying nozzles are arranged on the surface of the round pipe, the round pipe is communicated with a water pump, and an air blower is installed in the barrel shell; the air blowing nozzle and the suction nozzle are conveyed into the tunnel through the working vehicle, using is convenient, dust falling can be conducted anytime and anywhere, the suction fan sucks raised dust into the dust collecting box through the suction nozzle, air exhausted by the suction fan blows the raised dust in the distance into the air through the air blowing nozzle, efficient dust suction of the suction nozzle is facilitated, the air blower enables water mist to be diffused in a large range, raised dust is prevented from flying, and the working vehicle is convenient to use. And dust raising can be effectively inhibited.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically a ventilation and dust suppression device for the working face of blasting excavation in karst geological tunnels. Background Technology

[0002] After tunnel blasting, a large amount of dust will be generated. It takes half an hour for the dust to settle naturally in the tunnel. Dust will also be generated during construction, affecting the construction progress. Therefore, ventilation and dust suppression devices are needed to remove dust, which will help speed up the excavation of the tunnel face.

[0003] In related technologies, a search revealed a scheme for a ventilation and dust suppression device for tunnel blasting excavation faces (announcement number CN215927441U). This scheme uses the anchor rods in the tunnel support system as a foundation, and installs a sliding block on it to form a structure for installing the flexible cylinder mounting frame. No additional fasteners are required. In addition, when the tunnel face moves forward, a sliding block unit can be added forward, and the ventilation and dust suppression flexible cylinder can be dragged to the new working area to continue working.

[0004] However, the above solution requires the anchor bolts to be fixed in the tunnel before use, which requires a certain amount of installation time and steps. Due to the time and steps, it cannot suppress the dust generated by blasting in a timely manner, and its flexibility is also insufficient. The atomizing nozzles located at the top of the tunnel need to spray water continuously, otherwise the dust will easily rise after the water dries, and the dust removal will not be thorough. Utility Model Content

[0005] The purpose of this invention is to provide a ventilation and dust suppression device for the working face of blasting excavation in karst geological tunnels, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ventilation and dust suppression device for the working face of a karst geological tunnel blasting excavation, comprising a working vehicle that enters the tunnel to promptly suppress dust in the tunnel without delaying the blasting process; the working vehicle is equipped with a water tank and a water pump connected to the water tank.

[0007] A dust collection box is fixed to the work vehicle and is equipped with a suction fan.

[0008] The first ring pipe is fitted onto the working vehicle. Several suction nozzles are provided on the surface and sides of the first ring pipe. The first ring pipe is connected to the dust collection box. The first ring pipe, together with the suction nozzles, can suck dust from 360 degrees, with high dust collection efficiency, reducing the amount of dust in the tunnel.

[0009] A cylindrical shell is installed at the rear of the work vehicle. A round tube is installed on the cylindrical shell, and several spray nozzles are provided on the surface of the round tube. The round tube is connected to a water pump. A blower is installed inside the cylindrical shell. The blower can make the water mist diffuse and emit gas over a wider range, which can effectively prevent dust from floating.

[0010] Furthermore, a second ring pipe is installed on the side of the first ring pipe. The surface of the second ring pipe is provided with several air nozzles. The second ring pipe is connected to the air nozzle of the suction fan. The air nozzles blow up the dust in some corners, making it easier for the suction nozzle to collect the dust more efficiently and thoroughly.

[0011] Furthermore, the water tank is equipped with a filter cover inside the water inlet to filter out some impurities and prevent them from clogging the spray nozzle. The water inlet is screwed with a cap, and the surface of the water tank is equipped with a water level window, which allows the water level to be seen directly for convenient and timely water replenishment.

[0012] Furthermore, the end edge and middle part of the cylinder shell are respectively equipped with a first nozzle and a second nozzle arranged in a ring, so that the water mist can be diffused in all directions, which has a good effect on suppressing dust and improving the clarity in the tunnel.

[0013] Furthermore, a discharge pipe is installed on the lower part of the surface of the dust collection box, and a cover is rotatably installed on the discharge pipe. A limiter is installed on the discharge pipe, and the limiter includes a sleeve and a bent rod inserted into the sleeve. A clamping handle is screwed onto the bent rod, and the clamping handle abuts against the cover. When it is necessary to discharge the dust in the dust collection box, the cover is opened, and the dust flows out from the discharge pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) The air blower and suction nozzle are transported to the tunnel by the work vehicle. They are easy to use and can be used to reduce dust anytime and anywhere. The suction fan sucks the dust into the dust collection box through the suction nozzle. The air discharged by the suction fan blows the dust in the distance into the air through the air blower, which makes it easier for the suction nozzle to efficiently suck up dust and remove dust more thoroughly.

[0016] (2) The water pump draws water through the spray nozzle to form water mist, and the blower accelerates the air to spray out from the first nozzle and the second nozzle, so that the water mist spreads over a wide area, preventing dust from rising and effectively suppressing dust, ensuring that the environment in the tunnel is suitable for workers. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection between the first ring tube and the ring frame of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the second ring tube of this utility model;

[0020] Figure 4 This is a front view of the cylindrical shell of this utility model;

[0021] Figure 5This is a schematic diagram of the connection between the discharge pipe and the baffle of this utility model;

[0022] Figure 6 This is a schematic diagram of the internal structure of the water tank of this utility model.

[0023] In the diagram: 1. Working vehicle; 2. Water tank; 3. Water level window; 4. Water pump; 5. Dust collection box; 6. Discharge pipe; 7. Fan; 8. Second ring pipe; 9. First ring pipe; 10. Air nozzle; 11. Suction nozzle; 12. Limiting support plate; 13. Cylinder shell; 14. Air blower; 15. Round pipe; 16. Ring frame; 17. First nozzle; 18. Second nozzle; 19. Sleeve; 20. Clamping handle; 21. Bending rod; 22. Cover; 23. Sealing cover; 24. Filter cover; 25. Spray nozzle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example:

[0026] Please see Figure 1-6 This utility model provides a technical solution: a ventilation and dust suppression device for the working face of a karst geological tunnel blasting and excavation, including a working vehicle 1. The working vehicle 1 can drive into the tunnel and suppress dust in time after blasting, which can also reduce the required manpower. The working vehicle 1 is equipped with a water tank 2 and a water pump 4 connected to the water tank 2. The water tank 2 is filled with water in advance and can spray to suppress dust.

[0027] Dust collection box 5 is fixed to the working vehicle 1 and is equipped with a suction fan 7. The dust collection box 5 collects dust in the tunnel, reduces the amount of dust, and produces less dust when working in the tunnel.

[0028] The first ring pipe 9 is fitted on the working vehicle 1. The surface and sides of the first ring pipe 9 are provided with several suction nozzles 11. The first ring pipe 9 is connected to the dust collection box 5. The first ring pipe 9, together with the suction nozzles 11, realizes multi-directional dust extraction, speeds up the dust entering the dust collection box 5, and has high dust collection efficiency.

[0029] A cylindrical shell 13 is installed at the rear of the working vehicle 1. A circular tube 15 is installed on the cylindrical shell 13. Several spray nozzles 25 are provided on the surface of the circular tube 15. The circular tube 15 is connected to the water pump 4. A blower 14 is installed inside the cylindrical shell 13. After the spray nozzles 25 spray water mist, the blower 14 accelerates the air flow and uses the high-speed air flow to spread the water mist over a wide area into the tunnel, resulting in fast dust reduction and good effect.

[0030] In this embodiment, as Figure 1 and Figure 3 As shown, a second ring pipe 8 is installed on the side of the first ring pipe 9. The surface of the second ring pipe 8 is provided with a plurality of air nozzles 10. The second ring pipe 8 is connected to the air nozzles of the suction fan 7. The air nozzles 10 use the air discharged by the suction fan 7 to blow the air to various parts of the tunnel. Dust outside the suction range of the suction nozzle 11 can be sucked up, which helps to reduce the amount of dust in the tunnel.

[0031] In this embodiment, as Figure 1 and Figure 2 As shown, the work vehicle 1 is equipped with a ring frame 16. The first ring tube 9 and the second ring tube 8 are installed on the ring frame 16. The ring frame 16 supports the first ring tube 9 and the second ring tube 8 to ensure that the first ring tube 9 and the second ring tube 8 are not easily damaged or loosened.

[0032] In this embodiment, as Figure 1 and Figure 6 As shown, the water tank 2 is equipped with a filter cover 24 inside the water inlet. When water is added to the water tank 2, the filter cover 24 filters out some impurities to prevent impurities from clogging the spray nozzle 25 and will not affect the amount of water mist sprayed. The water inlet is screwed with a cover 23. Opening the cover 23 can clean out the impurities in the filter cover 24. The surface of the water tank 2 is equipped with a water level window 3, which allows you to directly see the water level and detect when the water is low.

[0033] In this embodiment, as Figure 1 and Figure 4 As shown, the first nozzle 17 and the second nozzle 18 are respectively installed in a ring arrangement on the end edge and the middle part of the cylindrical shell 13. The first nozzle 17 diffuses the water mist in all directions, and the second nozzle 18 diffuses the water mist to a distance, resulting in a large dust suppression range.

[0034] In this embodiment, as Figure 1 and Figure 4 As shown, the cylindrical shell 13 is rotatably mounted with a limiting support plate 12, which is fixedly connected to the working vehicle 1. After rotating the cylindrical shell 13 to change the angle, the bolts are tightened to press against the cylindrical shell 13, and the limiting support plate 12 maintains the inclined state of the cylindrical shell 13.

[0035] In this embodiment, as Figure 1 and Figure 5As shown, a discharge pipe 6 is installed on the lower part of the surface of the dust collection box 5. A cover 22 is rotatably installed on the discharge pipe 6. A limiter is installed on the discharge pipe 6. The cover 22 blocks the discharge pipe 6 to maintain the sealed state of the dust collection box 5.

[0036] In this embodiment, as Figure 1 and Figure 5 As shown, the limiter includes a sleeve 19 and a bent rod 21 inserted into the sleeve 19. The bent rod 21 is screwed with a clamping handle 20. The clamping handle 20 abuts against the cover 22. Twisting the clamping handle 20 separates it from the cover 22, which can quickly open the cover 22 and discharge the dust in the dust collection box 5.

[0037] Specifically, when in use, the working vehicle 1 enters the tunnel and first starts the suction fan 7. The suction fan 7 puts the dust collection box 5 under negative pressure. The dust collection box 5 uses the first ring pipe 9 to allow the suction nozzle 11 to draw in the surrounding dust and send it into the dust collection box 5. The air discharged by the suction fan 7 is blown into the second ring pipe 8. The second ring pipe 8 blows the air out through the air nozzle 10, using the air to blow the dust into the air, so that the suction nozzle 11 can draw in the dust more efficiently.

[0038] Next, the water pump 4 and the blower 14 are started. The water pump 4 pressurizes the water and sends it into the round pipe 15. The round pipe 15 supplies water to the spray nozzle 25. The spray nozzle 25 atomizes the water. The blower 14 accelerates the air and sprays it out at high speed from the first nozzle 17 and the second nozzle 18. The air flow causes the water mist to spread over a wide area, wetting the tunnel. When working in the tunnel, it is not easy to cause dust problems.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation and dust suppression device for the working face of a karst tunnel blasting excavation, characterized in that, include: The work vehicle (1) is equipped with a water tank (2) and a water pump (4) connected to the water tank (2). Dust collection box (5), the dust collection box (5) is fixed to the work vehicle (1), and the dust collection box (5) is equipped with a suction fan (7); The first ring tube (9) is fitted onto the work vehicle (1). The surface and sides of the first ring tube (9) are provided with several suction nozzles (11). The first ring tube (9) is connected to the dust collection box (5). A cylindrical shell (13) is installed at the rear of a work vehicle (1). A round tube (15) is installed on the cylindrical shell (13). Several spray nozzles (25) are provided on the surface of the round tube (15). The round tube (15) is connected to a water pump (4). A blower (14) is installed inside the cylindrical shell (13).

2. The ventilation and dust suppression device for blasting excavation face of a karst geological tunnel according to claim 1, characterized in that: A second ring pipe (8) is installed on the side of the first ring pipe (9). The surface of the second ring pipe (8) is provided with a number of air nozzles (10). The second ring pipe (8) is connected to the air nozzle of the suction fan (7).

3. The ventilation and dust suppression device for blasting excavation face of a karst geological tunnel according to claim 2, characterized in that: The work vehicle (1) is equipped with a ring frame (16), and the first ring pipe (9) and the second ring pipe (8) are installed on the ring frame (16).

4. The ventilation and dust suppression device for blasting excavation face of a karst geological tunnel according to claim 1, characterized in that: The water tank (2) is equipped with a filter cover (24) inside the water inlet, and the water inlet is screwed with a cap (23). The surface of the water tank (2) is provided with a water level window (3).

5. A ventilation and dust suppression device for the working face of a karst tunnel blasting excavation as described in claim 1, characterized in that: The end edge and middle part of the cylindrical shell (13) are respectively equipped with a first nozzle (17) and a second nozzle (18) arranged in an annular pattern.

6. The ventilation and dust suppression device for blasting excavation face of a karst geological tunnel according to claim 1, characterized in that: The cylindrical shell (13) is rotatably mounted with a limiting support plate (12), and the limiting support plate (12) is fixedly connected to the working vehicle (1).

7. A ventilation and dust suppression device for the working face of a karst tunnel blasting excavation as described in claim 1, characterized in that: The dust collection box (5) is equipped with a discharge pipe (6) on the lower part of its surface. The discharge pipe (6) is rotatably equipped with a cover (22) and a limiter is installed on the discharge pipe (6).

8. A ventilation and dust suppression device for the working face of a karst tunnel blasting excavation as described in claim 7, characterized in that: The limiter includes a sleeve (19) and a bent rod (21) inserted into the sleeve (19), the bent rod (21) being screwed with a clamping handle (20), the clamping handle (20) abutting against the cover (22).

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