Efficient water mist dust falling device used after blasting excavation of sand shale interbed tunnel

Abstract

The utility model relates to the technical field of tunnel dust fall, in particular to a water mist efficient dust fall device after blasting excavation of a sand shale interbed tunnel, which comprises a ventilation pipe and dust fall structures, the dust fall structures are arranged around the ventilation pipe, each dust fall structure comprises a moving assembly and an atomizing assembly, the moving assembly is arranged on the ventilation pipe in the radial direction, and the atomizing assembly is arranged on the ventilation pipe. The atomization assembly is mounted on one longitudinal side of the moving assembly, and the moving assembly supports and controls the atomization assembly to longitudinally swing to adjust the atomization range; the problem that an existing water mist dust falling device is poor in dust falling effect on mixed dust generated by the sand shale interbed tunnel is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tunnel dust falling technology field, concretely is a kind of sand interbedded shale tunnel blast excavation water mist high efficiency dust falling device. BACKGROUND

[0002] Sand interbedded shale tunnel due to its interbedded characteristics, cause when blasting excavation, mixed dust of coarse dust and fine dust coexist, and coarse dust and fine dust due to its mass characteristics, usually use water mist of different particle sizes to carry out targeted dust falling, and the water mist sprayed by the existing water mist dust falling device is difficult to match the mixed dust of complex condition, resulting in poor dust falling effect of mixed dust generated by sand interbedded shale tunnel, easy to affect subsequent engineering.

[0003] Therefore, the utility model provides a kind of sand interbedded shale tunnel blast excavation water mist high efficiency dust falling device to solve the above problems. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is that the existing water mist dust falling device has poor dust falling effect on the mixed dust generated by sand interbedded shale tunnel.

[0005] The utility model provides the following technical scheme: a kind of sand interbedded shale tunnel blast excavation water mist high efficiency dust falling device, including ventilation pipe and dust falling structure, ventilation pipe is installed with dust falling structure around, the dust falling structure includes moving assembly and atomization component, ventilation pipe is installed with moving assembly radially, the moving assembly is installed with atomization component on longitudinal side, and moving assembly supports and controls atomization component longitudinal swing and adjusts atomization range.

[0006] The atomization component includes annular main pipe, shunt pipe, flexible pipe and atomization nozzle, ventilation pipe is fixedly installed with annular main pipe around, shunt pipe is fixedly installed with annular main pipe on circumferential array, one end of flexible pipe is fixedly communicated with shunt pipe, and the other end of flexible pipe is fixedly installed with atomization nozzle.

[0007] The moving assembly includes horizontal connecting frame and telescopic body, and the end of any horizontal axial adjacent atomization nozzle away from ventilation pipe is fixedly connected with horizontal connecting body, the longitudinal side of horizontal connecting body is hinged with telescopic body, and the other end of telescopic body is hinged with the surface of ventilation pipe.

[0008] Ventilation pipe is arrayed with multiple atomization components of different nozzle aperture around axially.

[0009] The particle size of water mist sprayed by different atomization nozzles is increased from top to bottom, and the angle is decreased from top to bottom.

[0010] The horizontal connecting frame is in fan-shaped structure, and at least two horizontal connecting frames are arranged around ventilation pipe.

[0011] The utility model discloses the beneficial effect is as follows:

[0012] The utility model discloses a fixed installation dust fall structure around the ventilation pipe to improve the dust fall effect in the way of air extraction dust fall and water mist dust fall, and the atomizing nozzle of multiple different angles and particle sizes in the circumferential direction and axial direction can spray water mist in different area gradient for dust fall according to coarse dust and fine dust, which is favorable for improving the dust fall effect of mixed dust, at the same time, multiple atomizing nozzles in the circumferential direction and axial direction can adjust the angle together, which is favorable for improving the flexibility of dust fall process to realize accurate dust fall, and is favorable for adapting to different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0014] Fig. 1 It is the whole structure schematic diagram of the utility model;

[0015] Fig. 2 It is the side view structure schematic diagram of the utility model.

[0016] In the drawing: 1, ventilation pipe;2, moving assembly;21, horizontal connecting frame;22, telescopic body;3, atomizing assembly;31, annular main pipe;32, shunt pipe;33, flexible pipe;34, atomizing nozzle. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the following will combine the drawings, and the technical scheme in the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Therefore, the following detailed description of the embodiment of the utility model is not intended to limit the scope of the claimed utility model, but only represents some embodiments of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creating creative labor are within the scope of the utility model protection.

[0018] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0019] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used. Such terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0020] It also needs to be explained that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0021] In view of the poor dust-settling effect of the existing water mist dust-settling device for mixed dust generated in the sand-shale interbedded tunnel, the utility model provides a kind of sand-shale interbedded tunnel blasting excavation water mist high-efficiency dust-settling device, as shown in Figs. 1-2 It includes ventilation pipe 1 and dust-settling structure, ventilation pipe 1 is installed with dust-settling structure around, dust-settling structure includes moving assembly 2 and atomization assembly 3, ventilation pipe 1 is installed with moving assembly 2 radially, moving assembly 2 is installed with atomization assembly 3 on longitudinal side, moving assembly 2 supports and controls atomization assembly longitudinal swing and adjusts atomization range.

[0022] It needs to be explained that ventilation pipe 1 cooperates with external air extractor structure to be able to carry out air extraction, and air extraction using pipeline is a very mature technology in the prior art, which will not be described here.

[0023] In the process of sand-shale interbedded tunnel blasting excavation, ventilation pipe 1 is started to ventilate, negative pressure is formed near the working face after ventilation pipe 1 is started, and the polluted air generated by blasting is directly extracted to the outside of the hole, while fresh air from the tunnel entrance flows into the hole to supplement, so as to discharge harmful gas and dust in the tunnel. And due to the negative pressure formed near the air extraction of ventilation pipe 1, the dust generated by blasting is gathered around ventilation pipe 1, so that the dust around ventilation pipe 1 is atomized and settled by step through atomization assembly 3, and the dust-settling effect of mixed dust with different particle sizes can be improved through the combination of air guiding and atomization dust-settling.

[0024] As shown in Figs. 1-2As shown, the atomization assembly 3 comprises an annular main pipe 31, a shunt pipe 32, a flexible pipe 33 and an atomization nozzle 34, the annular main pipe 31 is fixedly installed around the ventilation pipe 1, the shunt pipe 32 is fixedly installed on the annular main pipe 31 in a circumferential array, one end of the flexible pipe 33 is fixedly communicated with the shunt pipe 32, and the other end of the flexible pipe 33 is fixedly installed with the atomization nozzle 34.

[0025] It should be noted that the annular main pipe 31 is connected with an external water pump for conveying liquid.

[0026] The external liquid is conveyed into the annular main pipe 31, and then enters the shunt pipe 32 and the flexible pipe 33, and finally is atomized and sprayed at the atomization nozzle 34 for dust reduction.

[0027] The annular main pipe 31 or the shunt pipe 32 can also be fixedly installed with a control valve for controlling the opening and closing of the pipeline communication.

[0028] As shown, Figs. 1-2 The moving assembly 2 comprises a transverse connecting frame 21 and an extension body 22, and the end of any horizontal axis adjacent to the atomization nozzle 34 is fixedly connected with a transverse connecting body away from the ventilation pipe 1, the longitudinal side of the transverse connecting body is hingedly connected with the extension body 22, and the other end of the extension body 22 is hingedly connected with the surface of the ventilation pipe 1.

[0029] When it is necessary to change the orientation angle of the atomization nozzle 34, the extension body 22 is started to drive the transverse connecting frame 21 to swing, thereby driving all the atomization nozzles 34 in the circumferential direction to swing, and further changing the orientation of the atomization spray of all the atomization nozzles 34, which is beneficial to improve the flexibility of the dust reduction process and realize precise dust reduction, and is beneficial to adapt to different working conditions.

[0030] It should be noted that the angle range of the atomization nozzle 34 adjusted by the extension body 22 is within 90° horizontally and vertically.

[0031] The ventilation pipe 1 has a plurality of atomization assemblies 3 with different nozzle diameters arranged in an axial array around the ventilation pipe 1. The plurality of atomization assemblies 3 with different nozzle diameters in the axial direction can spray water mist with different particle sizes, thereby realizing staged atomization, and different particle size dust generated after blasting of different sand shale interbedded tunnels can be captured in a targeted manner, thereby effectively improving the dust reduction effect. For example, the atomization nozzle 34 at the highest position of the outer side of the ventilation pipe 1 generates coarse mist droplets of 50-200 μm by a medium-low pressure nozzle of 3-5 MPa, thereby matching the dust with the momentum of the mist droplets to quickly settle by the principle of inertial collision, aiming at coarse particles of 5-100 μm such as quartz debris generated by sandstone blasting; the lower atomization nozzle 34 generates fine mist droplets of 10-50 μm by a high pressure nozzle or ultrasonic atomization of 8-15 MPa, thereby matching the fine dust of 1-5 μm generated by shale crushing to quickly settle.

[0032] It should be noted that adjacent annular main pipes 31 are interconnected, and the uppermost or lowermost annular main pipe 31 is connected to an external water pump.

[0033] The angles of different atomizing nozzles 34 increase or decrease along the axial direction.

[0034] Multiple atomizing nozzles 34 with increasing axial angles can spray water mist in different ranges, thereby spraying water mist of different particle sizes in different position ranges, which is conducive to forming a gradient spray of water mist to reduce dust.

[0035] It should be noted that, in this embodiment of the present disclosure, the water mist particle size sprayed by the atomizing nozzle 34 increases from top to bottom, while the angle decreases from top to bottom.

[0036] It should be noted that fine dust has a small mass and is dominated by Brownian motion and airflow drag, resulting in a Stokes number St < 0.1. Its trajectory is irregular, spreading over a wider area, with higher concentrations covering a larger area than coarse dust. Coarse dust, on the other hand, is more easily captured by ventilation duct 1 and mainly accumulates around it. Therefore, the fine water mist sprayed by the uppermost atomizing nozzle 34 with the largest angle can effectively suppress the smaller, wider-coverage fine dust, while the coarse water mist sprayed by the lowermost atomizing nozzle 34 can suppress the larger, more concentrated coarse dust around ventilation duct 1. This improves the dust suppression effect on dust of different particle sizes generated after blasting of sandstone and shale interbedded tunnels.

[0037] It should be noted again that the angle of the atomizing nozzle 34 refers to the angle between the atomizing nozzle 34 and the vertical ground.

[0038] like Figs. 1-2 As shown, the horizontal connecting frame 21 has a fan-shaped structure, and at least two horizontal connecting frames 21 are arranged around the ventilation pipe 1. A single fan-shaped horizontal connecting frame 21 can drive any number of atomizing nozzles 34 to swing, and multiple fan-shaped horizontal connecting frames 21 can adjust all atomizing nozzles 34.

[0039] It should be noted that the horizontal connecting frame 21 of each fan-shaped structure is hinged with an extension body 22, so that the horizontal connecting frame 21 of each fan-shaped structure can drive the atomizing nozzle 34 to swing and adjust the angle. The operator can adjust the different horizontal connecting frames 21 and atomizing nozzles 34 to different angles, thereby improving the flexibility of the atomization dust setting process. Alternatively, the operator can also select a longitudinal connecting rod hinged between the longitudinally adjacent horizontal connecting bodies. The longitudinal connecting rod can make the longitudinally adjacent horizontal connecting bodies swing synchronously, thereby driving all the atomizing nozzles 34 in the longitudinal direction to swing and adjust the angle, further improving the flexibility of the dust setting process to achieve precise dust setting, which is conducive to adapting to different working conditions. In this way, the flexibility of individual adjustment is reduced, but the number of extension bodies 22 can be reduced, which is conducive to ensuring the stability of the dust setting process.

[0040] During the blasting excavation of the sand-shale interbedded tunnel, the operator first starts the ventilation pipe 1 to extract the polluted air generated by the blasting to the outside of the hole, at the same time, the negative pressure is formed around the ventilation pipe 1 to gather dust, then the external liquid is delivered into the annular main pipe 31, the liquid enters each branch pipe 32 from the annular main pipe 31 and then enters the flexible pipe 33, so that all the atomizing nozzles 34 in the circumferential direction spray water mist for dust setting.

[0041] At the same time, the communication between the adjacent annular main pipes 31 makes the multiple atomizing nozzles 34 in the axial direction spray water mist of different particle sizes synchronously, thereby dust setting for different particle size dust, which is conducive to improving the dust setting effect. Among them, the fine water mist sprayed by the atomizing nozzle 34 with the largest angle on the uppermost horizontal can effectively dust set the fine dust with smaller mass and wider coverage, and the coarse water mist sprayed by the atomizing nozzle 34 with the smallest angle on the lowermost horizontal can dust set the coarse dust with larger mass and gathered around the ventilation pipe 1, thereby improving the dust setting effect of different particle size dust generated after the blasting of the sand-shale interbedded tunnel.

[0042] When it is necessary to adjust the dust setting angle of the atomizing nozzle 34, the operator starts the extension body 22 to drive the horizontal connecting frame 21 to swing, thereby driving the multiple atomizing nozzles 34 fixed on the horizontal connecting frame 21 to swing synchronously, and then the swing of the multiple horizontal connecting frames 21 can drive all the atomizing nozzles 34 to adjust the dust setting range, thereby adjusting the range of gradient dust setting, which is conducive to improving the dust setting effect of mixed dust generated after the blasting of the sand-shale interbedded tunnel.

[0043] The person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description are only for explaining the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A kind of sand shale interbedded tunnel blasting excavation after water mist high-efficiency dust fall device, including ventilation pipe (1) and dust fall structure, it is characterized by: The ventilation pipe (1) is provided with dust falling structures around, the dust falling structures comprise moving assemblies (2) and atomizing assemblies (3), the moving assemblies (2) are installed radially on the ventilation pipe (1), the atomizing assemblies (3) are installed on the longitudinal side of the moving assemblies (2), and the moving assemblies (2) support and control the longitudinal swing of the atomizing assemblies to adjust the atomizing range; The atomizing assemblies (3) comprise annular main pipes (31), shunt pipes (32), flexible pipes (33) and atomizing nozzles (34), the annular main pipes (31) are fixedly installed around the ventilation pipe (1), the shunt pipes (32) are fixedly installed in an array around the annular main pipes (31) in the circumferential direction, one end of the flexible pipe (33) is fixedly communicated with the shunt pipe (32), and the other end of the flexible pipe (33) is fixedly installed with the atomizing nozzle (34); The moving assemblies (2) comprise horizontal connecting frames (21) and telescopic bodies (22), the atomizing nozzle (34) is fixedly connected with a horizontal connecting body away from the ventilation pipe (1) at any horizontal axis direction adjacent position, the longitudinal side of the horizontal connecting body is hingedly connected with the telescopic body (22), and the other end of the telescopic body (22) is hingedly connected with the surface of the ventilation pipe (1).

2. The device according to claim 1, characterized in that: The ventilation pipe (1) is provided with a plurality of atomizing assemblies (3) with different nozzle diameters in an array in the axial direction around.

3. The device according to claim 2, characterized in that: The water mist particle diameters of different atomizing nozzles (34) in the axial direction increase from top to bottom, and the angles decrease from top to bottom.

4. The device according to claim 3, characterized in that: The horizontal connecting frames (21) are in a fan-shaped structure, and at least two horizontal connecting frames (21) are arranged around the ventilation pipe (1).

Images