A dust removal device for tunneling

Abstract

The present invention relates to the field of coal mining equipment, and proposes a dust removal device for tunneling tunnels, including a water mist injection system and a dust removal system arranged above a tunneling machine, the dust removal system including a front suction hood, a transition air duct, a first-level dust removal fan and a skeleton air duct connected in sequence; the first-level dust removal fan includes an extraction-type axial flow explosion-proof fan and a dust collector, the extraction-type axial flow explosion-proof fan includes an air suction duct, an impeller, an explosion-proof motor, and a motor housing, the dust collector includes an inlet pipe with a Venturi structure, a vibrating string filter plate, a dehydration device, a sewage outlet and a vibrating string filter plate nozzle, the water mist injection system includes a first-level pressurizing device and a second-level pressurizing device, and the output water pressure of the second-level pressurizing device is greater than that of the first-level pressurizing device. The present invention can effectively eliminate high-concentration dust in tunneling tunnels, improve the working environment underground in coal mines, and can be widely used in the field of coal mining.

Description

Technical Field

[0001] The invention relates to the field of coal mining equipment and provides a device for removing dust from a tunnel. Background Art

[0002] In the construction of coal mines, whether it is blasting mining technology or mechanical mining technology using a roadheader or a rock drilling rig, a large amount of coal dust will be generated during the tunnel excavation process, mainly coal dust and rock dust. Coal dust is one of the main hazard substances in mine construction, and its presence may cause explosions, especially in high-gas mines. The presence of coal dust will also directly affect the safe operation of underground workers. On the one hand, they will have difficulty breathing, blurred vision, and unable to operate machines and equipment normally, reducing labor productivity; on the other hand, due to inhaling a large amount of dust, they may suffer from occupational diseases and affect their health.

[0003] In tunnel excavation, cutting, material dropping, raking, transportation, and relocation will generate high concentrations of dust. Even with dust masks on, workers still cannot work normally. They often have to stop after a short excavation and wait for the dust to dissipate before they can continue working. In order to improve the underground working environment and ensure the safety of workers, relevant state departments require coal mining companies to persist in carrying out coal dust prevention and control work, to address the serious problem of coal dust accumulation in mining sites and return air tunnels, and to strengthen dust capture and removal work.

[0004] The roadheader is a device specially used for tunnel forming. A water mist injection system is designed on the roadheader, which consists of three parts. The first part is the external spray, which is located above and on both sides of the cutting reducer, and the water flow covers the upper and lower sides of the working face; the second part is the induced spray, which is located above the cutting reducer and is lower than the external spray rack in space, and the water flow covers the left and right sides of the working face; the third part is the internal spray, which is spirally distributed on the circumference of the cutting head. As the cutting head rotates, the mist water flow covers the front of the working face. Before the cutting motor is turned on, the water mist injection system is started first. The water flow and water mist cover the coal seam and rock stratum on the working face before cutting. The cutting operation is carried out, so that the cut objects are saturated with water, the dead weight increases and the falling is accelerated, thereby eliminating dust. However, in actual operation, the water volume of the roadheader water mist injection system is limited (if the water volume is too large, it will affect the operation and safety), and the cross-sectional area of ​​the roadway is large, so only part of the dust can be eliminated.

[0005] The wet vibrating string fan is a device specially used for dust removal in tunnels. It consists of an extraction explosion-proof ventilator, a sprayer, a vibrating string filter plate and a dehydration device. Spraying the filter plate, the fine fibers densely distributed on it and the water mist form a water curtain, which makes the dust attached to the air moist and heavier, and slides down along the fibers for easy collection. The impact force generated when the air passes through causes the water curtain to vibrate, which promotes the sliding of dust and the self-purification of the filter plate.

[0006] The tunnel boring machine and the wet vibrating string blower are both independently operated machines and equipment. The dust removal mechanisms of the two are different. How to use them together to minimize the dust concentration in the tunnel is the technical problem to be solved by this patent. Summary of the invention

[0007] The present invention overcomes the deficiencies of the prior art and aims to solve the technical problem of providing a tunneling tunnel dust removal device with good dust removal effect.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is: a tunneling dust removal device, including a water mist injection system, the water mist injection system includes an external water supply system and a nozzle connected to the external water supply system, the nozzle is installed at the front end of the tunneling machine, including an external spray nozzle, an internal spray nozzle and an induced spray nozzle, the tunneling machine dust removal device also includes a dust removal system arranged above the tunneling machine, the dust removal system includes a front suction hood, a transition wind duct, a first-level dust removal fan and a skeleton wind duct connected in sequence; the front suction hood The head section of the hood is rectangular and is provided with a wire mesh, and the tail section is circular. The front suction hood is arranged above the cutting arm of the tunnel boring machine, and its tail is connected to the head of the transition wind tube; the first-stage dust removal fan includes an exhaust-type axial flow explosion-proof fan and a dust collector. The exhaust-type axial flow explosion-proof fan includes an exhaust tube at the front end, one end of the exhaust tube is connected to the tail of the transition wind tube, and the other end is provided with an impeller, and the impeller is connected to the explosion-proof motor at the rear, and a motor housing is arranged outside the explosion-proof motor. The dust collector includes a Venturi fan. The inlet pipe, vibrating filter plate and dehydration device of the structure are connected, the inlet pipe is connected with the exhaust port of the extraction type axial flow explosion-proof fan, the vibrating filter plate is arranged between the inlet pipe and the dehydration device, the vibrating filter plate and the dehydration device are provided with a sewage outlet below, the vibrating filter plate is provided with a vibrating filter plate nozzle connected with the water mist injection system above the vibrating filter plate, and the vibrating filter plate nozzle is used to spray the vibrating filter plate; the air outlet of the first-stage dust removal fan is connected with the skeleton wind pipe; the water mist injection system includes a first-stage pressurizing device The first-stage pressurizing device and the second-stage pressurizing device have water inlets connected to an external water supply system, the water outlet of the first-stage pressurizing device is connected to the external spray nozzle, the ejector spray nozzle, and the vibrating filter plate nozzle, and is used for pressurizing the external water supply and then delivering it to the external spray nozzle, the ejector spray nozzle, and the vibrating filter plate nozzle respectively, the water outlet of the second-stage pressurizing device is connected to the inner spray nozzle, and is used for pressurizing the external water supply and then delivering it to the inner spray nozzle, and the output water pressure of the second-stage pressurizing device is greater than that of the first-stage pressurizing device.

[0009] The outer spray nozzle and the ejector spray nozzle are Venturi nozzles, and the inner spray nozzle is a mist nozzle.

[0010] The front air suction hood also includes an air suction hood mounting frame, and the air suction hood is fixed above the cutting arm of the tunnel boring machine through the air suction hood mounting frame. The first-level dust removal fan also includes a fan mounting base and a fan bracket. The first-level dust removal fan is fixedly arranged on the tunnel boring machine body through the fan mounting base and the fan bracket. The skeleton air duct also includes a skeleton air duct bracket, and the skeleton air duct is fixedly arranged above the belt conveyor through the skeleton air duct bracket, and moves along the retractable belt conveyor track with the belt conveyor.

[0011] The dust removal device for an excavation tunnel also includes a sliding trolley and a secondary dust removal fan with the same structure as the primary dust removal fan. The sliding trolley is arranged on the retractable belt conveyor track and is hinged to the belt transfer machine trolley. The air inlet of the secondary dust removal fan is connected to the exhaust outlet of the skeleton air duct. The secondary dust removal fan is fixedly arranged on the sliding trolley and moves along the retractable belt conveyor track with the sliding trolley.

[0012] The outlet water pressure of the first-stage pressurizing device is 3.0 MPa, and the outlet water pressure of the second-stage pressurizing device is 8 MPa.

[0013] The diameter of the rear cross-section of the front suction hood is Φ600mm, the size of the head rectangle is: width 1400mm~1500mm, height 200mm, and the distance between the front suction hood and the working surface is less than 5000mm.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention, through ingenious arrangement, carries a dust removal system including a front suction hood and a primary dust removal fan above the tunnel boring machine, so that the existing tunnel boring machine water mist injection system is combined with the spraying, filtering and dehydration functions in the dust removal system, which can effectively eliminate the high-concentration dust in the tunneling tunnel, improve the working environment underground in the coal mine, protect the health of underground workers, and reduce the wear of dust on machinery and equipment.

[0016] 2. The water mist spray system of the present invention adopts a two-stage pressurizing device, in which the external spray, the induced spray and the vibrating wire filtration spray use the first-stage pressurized water flow, while the internal spray uses the second-stage pressurized water flow with a higher pressure, so that after the system pressure is increased, the spray water flow range is increased, effectively covering the front working surface of the tunnel boring machine, and improving the dust removal effect. In addition, since the spray pressure above the vibrating wire filter plate is also increased, the dust wetting and fiber vibration are promoted, and the dust removal effect is enhanced.

[0017] 3. The first-stage dust removal fan of the present invention includes an exhaust-type axial flow explosion-proof fan and a dust collector. The inlet pipe at the front end of the dust collector adopts a Venturi tube shape. When the high-speed dust-containing gas passes through the Venturi tube, it drives the surrounding gas into the injection to form a large flow circulation. When the dust-containing gas passes through the neck of the Venturi tube, it is equivalent to being compressed, which promotes larger particles to quickly sink to the sewage outlet below, while fine particles quickly pass through the vibrating string filter plate for filtration, thereby enhancing the dust removal effect of the dust removal device.

[0018] 4. The dust removal system of the present invention is provided with a front air suction hood at the front end of the first-stage dust removal fan, so that the air inlet end of the dust removal fan can extend to the working face of the tunnel boring machine, which is convenient for inhaling dust-containing air. A wire mesh is provided inside the front air suction hood to prevent gangue, coal blocks, etc. from damaging the fan. The front air suction hood adopts a rectangular head and a circular tail structure, which is convenient for the tunnel boring machine operator to work and does not affect the line of sight, so that the air inlet can be as close to the working face of the tunnel boring machine as possible, thereby improving the dust removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A front view of a dust removal system of a tunneling dust removal device according to Embodiment 1 of the present invention;

[0020] Figure 2 A top view of a dust removal system of a tunneling dust removal device proposed in Example 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a water mist injection system of a tunnel dust removal device proposed in Example 1 of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a first-stage dust removal fan;

[0023] Figure 5 This is a front view of the front air suction hood;

[0024] Figure 6 It is a top view of the front air suction hood;

[0025] Figure 7 A front view of a dust removal system of a tunneling dust removal device according to Embodiment 2 of the present invention;

[0026] In the figure: 1 is a tunneling machine, 2 is a dust elimination system, 3 is a front suction hood, 4 is a transition air duct, 5 is a primary dust removal fan, 6 is a skeleton air duct, 7 is a belt conveyor, 8 is a retractable belt conveyor track, 9 is a secondary dust removal fan, 10 is a sliding trolley, 11 is a belt conveyor trolley, 101 is an external spray nozzle, 102 is an internal spray nozzle, 103 is an ejector spray nozzle, 104 is a primary pressurizing device, 105 is a secondary The present invention relates to a stage pressurizing device, 31 is an air suction hood mounting frame, 51 is an extractable axial flow explosion-proof fan, 52 is a dust collector, 53 is a fan mounting base, 54 is a fan bracket, 61 is a skeleton wind tube bracket, 511 is an air suction tube, 512 is an impeller, 513 is an explosion-proof motor, 514 is a motor housing, 521 is an inlet pipe, 522 is a vibrating string filter plate, 523 is a dehydration device, 524 is a sewage outlet, and 525 is a vibrating string filter plate nozzle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Embodiment 1 of the present invention provides a tunneling dust removal device, including a water mist injection system and a dust removal system 2, such as Figure 1 and Figure 2 As shown, the dust removal system 2 is arranged above the tunnel boring machine 1, and the dust removal system 2 includes a front air suction hood 3, a transition air duct 4, a first-level dust removal fan 5 and a skeleton air duct 6 which are connected in sequence; the front air suction hood 3 is arranged above the cutting arm of the tunnel boring machine, and its tail is connected to the head of the transition air duct 4; the air inlet of the first-level dust removal fan 5 is connected to the tail of the transition air duct 4, and the air outlet of the first-level dust removal fan 5 is connected to the skeleton air duct 6.

[0029] Among them, Figure 3As shown, the water mist injection system includes an external water supply system, a nozzle connected to the external water supply system, and a primary pressurizing device 104 and a secondary pressurizing device 105; the nozzle is installed at the front end of the tunnel boring machine, including an external spray nozzle 101, an internal spray nozzle 102 and an ejection spray nozzle 103; the water inlets of the primary pressurizing device 104 and the secondary pressurizing device 105 are connected to the external water supply system, the water outlet of the primary pressurizing device 104 is connected to the external spray nozzle 101, the ejection spray nozzle 103, and the vibrating string filter plate nozzle 525, and is used to pressurize the external water supply and then deliver it to the external spray nozzle 101, the ejection spray nozzle 103, and the vibrating string filter plate nozzle 525 respectively, the water outlet of the secondary pressurizing device 105 is connected to the internal spray nozzle 102, and is used to pressurize the external water supply and then deliver it to the internal spray nozzle 102, and the output water pressure of the secondary pressurizing device 105 is greater than that of the primary pressurizing device 104.

[0030] like Figure 4 As shown, it is a schematic diagram of the structure of the primary dust removal fan 5, the primary dust removal fan 5 includes an exhaust-type axial flow explosion-proof fan 51 and a dust collector 52, the exhaust-type axial flow explosion-proof fan 51 includes a suction tube 511 located at the front end, one end of the suction tube 511 is connected to the tail of the transition wind tube 4, and the other end is provided with an impeller 512, the impeller 512 is connected to the explosion-proof motor 513 located at the rear, the explosion-proof motor 513 is provided with a motor housing 514 outside, the dust collector 52 includes an inlet pipe 521 with a Venturi structure, a vibrating A chord filter plate 522 and a dehydration device 523, the inlet pipe 521 is connected to the exhaust port of the extraction type axial flow explosion-proof fan 51, the vibrating string filter plate 522 is arranged between the inlet pipe 521 and the dehydration device 523, a sewage outlet 524 is arranged below the vibrating string filter plate 522 and the dehydration device 523, a vibrating string filter plate nozzle 525 connected to the water outlet of the first-level pressurizing device of the water mist injection system is arranged above the vibrating string filter plate 522, and the vibrating string filter plate nozzle 525 is used to spray the vibrating string filter plate.

[0031] like Figure 5 and Figure 6The figure shows the structure diagram of the front suction hood 3. The cross section of the head of the front suction hood 3 is rectangular. The size of the head rectangle is: 1400mm~1500mm wide and 200mm high. A wire mesh is arranged inside the front suction hood. The cross section of the tail is circular. The diameter of the circular cross section of the tail is Φ600mm. The distance between the front suction hood and the working surface is less than 5000mm. The setting of the front suction hood allows the air inlet end of the first-stage dust removal fan 5 to extend toward the working surface of the tunnel boring machine, which is convenient for inhaling dusty air. The front suction hood is provided with a wire mesh inside, which can also prevent gangue, coal blocks, etc. from damaging the fan. The front suction hood adopts a rectangular head and a circular tail structure, which is convenient for the tunnel boring machine operator to work and does not affect the line of sight, so that the air inlet can be as close to the working surface of the tunnel boring machine as possible, thereby improving the dust removal effect.

[0032] Furthermore, the outer spray nozzle 101 and the ejector spray nozzle 103 are Venturi nozzles, and the inner spray nozzle 102 is a mist nozzle. The outer spray nozzle 101 and the ejector spray nozzle 103 are set as Venturi nozzles, which can increase the spray flow rate and improve the clogging phenomenon of the water spray nozzle.

[0033] Furthermore, in the water mist spraying system, the outlet water pressure of the first-stage pressurizing device is 3.0MPa, and the outlet water pressure of the second-stage pressurizing device is 8MPa. The present invention adopts a two-stage pressurization method, that is, the first-stage pressurization introduces the 3MPa water flow generated by the pressurization into the external spray, the ejection spray and the dust removal fan; the second-stage pressurization introduces the 8MPa water flow generated by the pressurization into the internal spray pipeline. After the system pressure is increased, the range of the spray water flow increases, effectively covering the working surface in front of the tunnel boring machine and improving the dust removal effect.

[0034] Furthermore, if Figure 1 As shown, the dust removal system 2 also includes an air suction hood mounting frame 31, a fan mounting base 53, a fan bracket 54 and a skeleton wind tube bracket 61. The air suction hood 3 is fixed above the cutting arm of the tunnel boring machine through the air suction hood mounting frame 31, the first-stage dust removal fan 5 is fixedly arranged on the tunnel boring machine body through the fan mounting base 53 and the fan bracket 54, and the skeleton wind tube 6 is fixedly arranged above the belt conveyor 7 through the skeleton wind tube bracket 61, and moves along the retractable belt conveyor track 8 with the belt conveyor 7.

[0035] The working principle of the present invention is as follows: the dust particles generated during the cutting operation are of different sizes. They first come into contact with the water flow and water mist sprayed by the tunneling machine. After being covered by water, their deadweight increases, and large particles fall quickly, playing a primary dust removal role. During the falling process of small and micro particles, the explosion-proof motor in the dust removal fan drives the impeller to rotate, and the negative pressure formed draws the nearby dust-containing gas into the suction cylinder of the primary dust removal fan through the front suction hood and the transition wind cylinder. There is airflow passing through the motor housing, and the dust-containing gas rotates through the fan flow channel. During the rotation process, under the action of centrifugal force, larger particles fall down and are extracted. The small particles discharged by the axial flow explosion-proof fan enter the dust collector with high-speed air. When the high-speed dust-containing gas passes through the inlet pipe of the Venturi structure, it drives the surrounding gas into the jet, forming a large flow cycle. When the dust-containing gas passes through the neck of the inlet pipe, it is equivalent to being compressed, which promotes the large particles to sink quickly to the sewage outlet, while the small particles quickly pass through the vibrating filter plate. The vibrating filter plate is covered with vertical fibers. The fibers with water curtains can make the dust wet, increase weight or aggregate. At the same time, the dust-containing gas impacts the fibers to make them vibrate, which promotes the combination of water mist and small dust particles in the gas. Therefore, after passing through the spray water curtain of the vibrating filter plate, the small and micro particles in the dust are wet, increase weight or aggregate, slide down the filter plate, and are discharged through the sewage outlet together with the water formed by the dehydration device, while the air that has been separated from the dust is discharged along the dehydration device at the tail of the dust collector and enters the lane through the air outlet.

[0036] Embodiment 2 of the present invention also proposes a dust removal device for tunneling, including a water mist injection system and a dust removal system. The structures of the water mist injection system and the dust removal system are basically the same as those of embodiment 1, except that the dust removal system also includes a sliding trolley 10 and a secondary dust removal fan 9 having the same structure as the primary dust removal fan 5. Figure 7 As shown, it is a schematic diagram of the structure of the dust removal system in Example 2 of the present invention, the sliding trolley 10 is arranged on the retractable belt conveyor track 8 and is hinged to the belt transfer machine trolley 11, the air inlet of the secondary dust removal fan 9 is connected to the air outlet of the skeleton wind tube 6, and the secondary dust removal fan 9 is fixedly arranged on the sliding trolley 10, and moves along the retractable belt conveyor track 8 with the sliding trolley 10. In addition, the vibrating string filter plate nozzle in the secondary dust removal fan 9 is also connected to the water outlet of the primary pressurizing device of the water mist injection system. By setting up two dust removal fans, the dust removal effect of the system can be further enhanced. Moreover, the secondary dust removal fan is mounted on the sliding trolley 10 hinged to the belt transfer machine trolley 11, so that the secondary dust removal fan can move forward with the tunnel boring machine without affecting the stability of the dust removal system.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tunneling dust removal device, comprising a water mist spray system, the water mist spray system comprising an external water supply system and a nozzle connected to the external water supply system, the nozzle being installed at the front end of a tunneling machine, comprising an external spray nozzle (101), an internal spray nozzle (102) and an ejector spray nozzle (103), characterized in that: The excavation tunnel dust removal device also includes a dust removal system (2) arranged above the excavator, and the dust removal system (2) includes a front air suction hood (3), a transition air duct (4), a primary dust removal fan (5) and a skeleton air duct (6) connected in sequence; The front suction hood (3) has a rectangular head cross section and is provided with a steel wire mesh, and a circular tail cross section. The front suction hood (3) is arranged above the cutting arm of the tunnel boring machine, and its tail is connected to the head of the transition wind tube (4). The primary dust removal fan (5) comprises an exhaust axial flow explosion-proof ventilator (51) and a dust collector (52). The exhaust axial flow explosion-proof ventilator (51) comprises an exhaust pipe (511) located at the front end, one end of the exhaust pipe (511) is connected to the tail of the transition wind tube (4), and the other end is provided with an impeller (512). The impeller (512) is connected to an explosion-proof motor (513) located at the rear, and a motor housing (514) is provided on the outside of the explosion-proof motor (513). The dust collector (52) The invention comprises an inlet pipe (521) adopting a Venturi structure, a vibrating filter plate (522) and a dehydration device (523), wherein the inlet pipe (521) is connected to the exhaust port of the exhaust-type axial flow explosion-proof fan (51), the vibrating filter plate (522) is arranged between the inlet pipe (521) and the dehydration device (523), a sewage outlet (524) is arranged below the vibrating filter plate (522) and the dehydration device (523), a vibrating filter plate nozzle (525) connected to the water mist injection system is arranged above the vibrating filter plate (522), and the vibrating filter plate nozzle (525) is used to spray the vibrating filter plate; the air outlet of the primary dust removal fan (5) is connected to the skeleton wind tube (6); The water mist spraying system comprises a primary pressurizing device (104) and a secondary pressurizing device (105); the water inlets of the primary pressurizing device (104) and the secondary pressurizing device (105) are connected to an external water supply system; the water outlet of the primary pressurizing device (104) is connected to the external spray nozzle (101), the ejection spray nozzle (103), and the vibrating string filter plate nozzle (525), and is used to pressurize the external water supply and then deliver it to the external spray nozzle (101), the ejection spray nozzle (103), and the vibrating string filter plate nozzle (525); the water outlet of the secondary pressurizing device (105) is connected to the internal spray nozzle (102), and is used to pressurize the external water supply and then deliver it to the internal spray nozzle (102); the output water pressure of the secondary pressurizing device (105) is greater than that of the primary pressurizing device (104); The outer spray nozzle (101) and the ejector spray nozzle (103) are Venturi nozzles; It also includes a sliding trolley (10) and a secondary dust removal fan (9) having the same structure as the primary dust removal fan (5); the sliding trolley (10) is arranged on a retractable belt conveyor track (8) and is hinged to a belt transfer machine trolley (11); an air inlet of the secondary dust removal fan (9) is connected to an air outlet of the skeleton air duct (6); the secondary dust removal fan (9) is fixedly arranged on the sliding trolley (10) and moves along the retractable belt conveyor track (8) with the sliding trolley (10).

2. The device for removing dust from a tunnel according to claim 1, characterized in that: The inner spray nozzle (102) is a mist nozzle.

3. The device for removing dust from a tunnel according to claim 1, characterized in that: The front air suction hood (3) further comprises an air suction hood mounting frame (31), and the air suction hood (3) is fixed above the cutting arm of the tunnel boring machine through the air suction hood mounting frame (31). The first-stage dust removal fan (5) further comprises a fan mounting base (53) and a fan bracket (54), and the first-stage dust removal fan (5) is fixedly arranged on the tunnel boring machine body through the fan mounting base (53) and the fan bracket (54). The skeleton wind tube (6) further comprises a skeleton wind tube bracket (61), and the skeleton wind tube (6) is fixedly arranged above the belt conveyor (7) through the skeleton wind tube bracket (61), and moves along the retractable belt conveyor track (8) with the belt conveyor (7).

4. The device for removing dust from a tunnel according to claim 1, characterized in that: The outlet water pressure of the first-stage pressurizing device is 3.0 MPa, and the outlet water pressure of the second-stage pressurizing device is 8 MPa.

5. The device for removing dust from a tunnel according to claim 1, characterized in that: The cross-sectional diameter of the rear portion of the front suction hood (3) is Φ600 mm, the size of the rectangular head portion is: 1400 mm to 1500 mm in width and 200 mm in height, and the distance between the front suction hood and the working surface is less than 5000 mm.

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