Ventilation and dust removal device for driving working face

Abstract

The invention provides a ventilation and dust removal device for a driving working face, and relates to the technical field of coal mine ventilation and dust removal, the ventilation and dust removal device comprises a dust removal box, a first fan blade and a first driver, the dust removal box is provided with a containing cavity and is provided with an air inlet and an air outlet which are communicated with the containing cavity; the first fan blade is pivotally mounted outside the dust removal box and is adjacent to the air outlet, and the first driver is in transmission connection with the first fan blade through a speed regulation assembly, so that the first fan blade introduces dust-containing air of a driving working face into the accommodating cavity for dust removal and exhausts clean air; the first fan blade is provided with a low-speed position and a high-speed position, and the first fan blade can be switched between the low-speed position and the high-speed position so as to adjust the rotating speed of the first fan blade. The air supply amount can be automatically adjusted by changing the rotating speed of the first fan blades, so that the operation power of the device is adjusted, the ventilation and dust removal efficiency of the driving working face is guaranteed, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation and dust removal in coal mines, and in particular to a ventilation and dust removal device for an excavation working face. Background Art

[0002] The coal mine excavation working face, also known as the excavation head, refers to the separate single-ended tunnel that is first mined in preparation for the mining working face. The tunnel is mainly used for excavation, and has functions including coal exploration, coal excavation, water exploration, and gas exploration. It has no passage to the ground and no independent ventilation system, so it is necessary to use ventilation and dust removal equipment to ventilate and dust remove the inside of the tunnel.

[0003] However, the ventilation and dust removal devices in the related art are often unable to automatically adjust the operation of the device according to the changes in the air quality in the tunneling head. As a result, when the air quality is poor, if the ventilation efficiency of the device is insufficient, the dust in the tunneling head cannot be effectively removed, and it is difficult to ensure the safety of the workers. When the air quality is good, if the device is still operated at high power, it not only increases energy consumption, but also easily interferes with the normal working environment of the tunneling head due to excessive ventilation. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a ventilation and dust removal device for an excavation working face, which can automatically adjust the air supply volume by changing the rotation speed of the first fan blade to achieve adjustment of the operating power of the device, thereby ensuring the ventilation and dust removal efficiency of the excavation working face and reducing energy consumption.

[0006] According to an embodiment of the present invention, a ventilation and dust removal device for an excavation working face includes a dust removal box, a first fan blade and a first drive. The dust removal box has a accommodating chamber and is provided with an air inlet and an air outlet connected to the accommodating chamber; the first fan blade is pivotally mounted on the outside of the dust removal box and adjacent to the air outlet, and the first drive is transmission-connected to the first fan blade through a speed regulating component, so that the first fan blade introduces dust-containing air from the excavation working face into the accommodating chamber for dust removal and discharges clean air. The first fan blade has a low speed position and a high speed position, and the first fan blade can switch between the low speed position and the high speed position to adjust the rotation speed of the first fan blade.

[0007] According to the ventilation and dust removal device for the excavation working face of the embodiment of the present invention, the first drive drives the first fan blade to rotate through the speed regulating component, so as to suck the dust-containing air of the excavation working face through the air inlet to the accommodating chamber of the dust removal box for dust removal treatment, and discharge the treated clean air from the air outlet, thereby realizing ventilation and dust removal of the excavation working face and ensuring the working safety of the operators, wherein the speed regulating component can switch the first fan blade between a low speed position and a high speed position, so as to automatically and flexibly adjust the rotation speed of the first fan blade according to the air quality (that is, the dust concentration) of the excavation working face, so that when the air quality is poor, the first fan blade is located at a high speed position to increase the air supply to the dust removal box, thereby ensuring the high-power operation of the device, and when the air quality is good, the first fan blade is located at a low speed position to reduce the air supply to the dust removal box, thereby maintaining the low-power operation of the device. Therefore, compared with the related art, the present invention can automatically adjust the air supply by changing the rotation speed of the first fan blade to achieve the adjustment of the operating power of the device, thereby ensuring the ventilation and dust removal efficiency of the excavation working face and reducing energy consumption.

[0008] In some embodiments, the speed regulating assembly includes a speed regulating box, a driving shaft and a telescopic cylinder.

[0009] The speed regulating box is installed outside the dust removal box, the driving shaft is pivotally installed in the speed regulating box and connected to the first driving transmission, and two driving gears are sleeved on the driving shaft along the axial direction of the driving shaft;

[0010] The cylinder body of the telescopic cylinder is connected to the speed regulating box, the piston rod of the telescopic cylinder is connected to the first fan blade through an adjusting shaft, the first fan blade is located outside the speed regulating box, the adjusting shaft is pivotally connected to the speed regulating box and is at least partially located outside the speed regulating box, and the adjusting shaft is sleeved with a first driven gear and a second driven gear along the axial direction of the adjusting shaft;

[0011] The telescopic cylinder can push and pull the adjusting shaft relative to the speed regulating box to slide along the axial direction of the adjusting shaft, so that the first driven gear and the second driven gear are engaged with the corresponding driving gear in turn, so that the first fan blade switches between the low speed position and the high speed position.

[0012] In some embodiments, the air inlet and the air outlet are arranged relatively to each other along a first direction, and at least one of the air inlet and the air outlet is connected to the excavation working face through a ventilation pipe, and the ventilation pipe can be extended and retracted along the first direction to adjust the length of the ventilation pipe.

[0013] In some embodiments, the air outlet is connected to the excavation working face through the ventilation pipe, and the first fan blade and the speed regulating box are both located in the end of the ventilation pipe away from the air outlet.

[0014] In some embodiments, the ventilation pipe includes a plurality of sleeves, and the plurality of sleeves are sequentially sleeved from the inside to the outside, and any two adjacent sleeves are slidably connected along the first direction.

[0015] Furthermore, a sealing member is sandwiched between the peripheral wall surfaces of any two adjacent sleeves to seal the gap between the peripheral wall surfaces of any two adjacent sleeves.

[0016] Furthermore, the outer contour line of the cross section of the sleeve is one of a rectangle, a circle and any closed curve.

[0017] In some embodiments, among any two adjacent sleeves, the end of the outer sleeve facing away from the dust removal box is provided with a walking assembly, and the inner sleeve is provided with a walking track extending along the first direction;

[0018] The walking assembly includes a mounting frame, a second drive and a walking wheel, the mounting frame is connected to the external sleeve, the second drive is installed on the mounting frame and is transmission-connected to the walking wheel, and the walking wheel is rollingly connected to the walking track so that the internal sleeve can extend or retract relative to the external sleeve along the first direction.

[0019] In some embodiments, the ventilation duct is provided with a dust filter, which is arranged adjacent to the dust removal box and is suitable for filtering the air in the ventilation duct.

[0020] Furthermore, the dust filter is detachably connected to the ventilation pipe.

[0021] In some embodiments, the air inlet is closer to the terminal end of the excavation working face than the air outlet, and the air inlet is provided with a dust sensor, and the dust sensor is used to monitor the dust concentration of the excavation working face.

[0022] In some embodiments, the ventilation and dust removal device also includes a dust reduction nozzle, which is installed on the top of the accommodating chamber. The dust reduction nozzle is connected to an external water source through a water inlet pipe so that the dust reduction nozzle can reduce dust from the dust-containing gas in the accommodating chamber. The dust removal box is also provided with a sewage outlet connected to the accommodating chamber.

[0023] In some embodiments, the ventilation and dust removal device also includes a third drive, a rotating tube and a stirring frame. The third drive is transmission-connected to the rotating tube. The stirring frame and the dust reduction nozzle are provided on the rotating tube. The rotating tube and the stirring frame can be pivotally mounted in the accommodating cavity, and the direction of the pivot axis of the rotating tube is consistent with the height direction of the dust removal box.

[0024] In some embodiments, the ventilation and dust removal device also includes a diversion pipe, which is connected to the rotating tube and is in multiple number. The multiple diversion pipes are arranged at intervals along the circumference of the rotating tube. Each of the diversion pipes is provided with at least one dust reduction nozzle, and the dust reduction nozzle is connected to the water inlet pipe through the diversion pipe.

[0025] In some embodiments, the ventilation and dust removal device further comprises a second fan blade, which is transmission-connected to the rotating tube through a transmission assembly and is located between the dust reduction nozzle and the stirring frame in the height direction of the dust removal box, and the second fan blade is pivotally mounted in the accommodating cavity, and the direction of the pivot axis of the second fan blade is perpendicular to the direction of the pivot axis of the rotating tube;

[0026] There are two second blades, one of which is arranged adjacent to the air inlet, and the other is arranged adjacent to the air outlet, and the two second blades rotate in opposite directions to draw the dust-laden air from the excavation working face into the accommodating chamber.

[0027] In some embodiments, the ventilation and dust removal device further includes a guide plate, the guide plate is connected to the inner peripheral wall of the accommodating chamber at an angle and extends in a direction from the inner peripheral wall of the accommodating chamber toward the inner bottom wall, and the guide plate is located between the dust reduction nozzle and the second fan blade in the height direction of the dust removal box;

[0028] There are two guide plates, one of which is located above the air inlet, and the other is located above the air outlet, so as to guide the dust-laden air to the bottom of the accommodating cavity.

[0029] In some embodiments, the ventilation and dust removal device also includes a guide block, which is installed in the accommodating chamber and together with the inner bottom wall of the accommodating chamber defines a storage chamber, the third drive is located in the storage chamber, and the guide block is provided with a guide surface, which extends obliquely along the direction from the rotating tube toward the inner bottom wall of the accommodating chamber.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a ventilation and dust removal device for an excavation working face according to an embodiment of the present invention.

[0032] Figure 2 The figure is a schematic cross-sectional structural diagram of a ventilation pipe in a ventilation and dust removal device for an excavation working face according to an embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of the connection structure of the first fan blade, the first drive and the speed regulating assembly in the ventilation and dust removal device for the excavation working face according to an embodiment of the present invention.

[0034] Figure 4 It is a schematic diagram of the connection structure of the first drive and speed regulating components in the ventilation and dust removal device for the excavation working face according to an embodiment of the present invention (the speed regulating box is removed).

[0035] Figure 5 It is a schematic structural diagram of the traveling component part of the ventilation and dust removal device for the excavation working face according to an embodiment of the present invention.

[0036] Figure 6 It is a schematic cross-sectional structural diagram of a dust removal box portion of a ventilation and dust removal device for an excavation working face according to an embodiment of the present invention.

[0037] Figure 7 It is a schematic diagram of the connection structure of the dust suppression nozzle, the third drive, the rotating tube and the stirring frame in the ventilation and dust removal device for the excavation working face according to an embodiment of the present invention.

[0038] Figure 8 It is a schematic diagram of the connection structure of the rotating tube, the second fan blade and the transmission assembly in the ventilation and dust removal device for the excavation working face according to an embodiment of the present invention.

[0039] Figure numerals: 1, dust removal box, 11, accommodating chamber, 12, air inlet, 13, air outlet, 14, guide plate, 15, guide block, 2, first fan blade, 3, first drive, 4, speed regulating assembly, 41, speed regulating box, 42, driving shaft, 43, telescopic cylinder, 44, driving gear, 45, adjusting shaft 45, 46, first driven gear, 47, second driven gear, 5, ventilation pipe, 51, sleeve, 52, seal, 53, walking assembly, 531, mounting frame, 532, second drive, 533, walking wheel, 54, walking track, 55, fixing frame, 56, dust filter, 6, dust sensor, 7, dust suppression nozzle, 71, water inlet pipe, 8, third drive, 81, rotating tube, 82, stirring frame, 83, diverter pipe, 9, second fan blade, 91, transmission assembly. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] like Figures 1 to 6As shown, a ventilation and dust removal device for an excavation working face according to an embodiment of the present invention comprises a dust removal box 1, a first fan blade 2 and a first drive 3. The dust removal box 1 has a accommodating chamber 11 and is provided with an air inlet 12 and an air outlet 13 connected to the accommodating chamber 11; the first fan blade 2 is pivotally mounted on the outside of the dust removal box 1 and adjacent to the air outlet 13, and the first drive 3 is transmission-connected to the first fan blade 2 through a speed regulating component 4, so that the first fan blade 2 introduces dust-containing air of the excavation working face into the accommodating chamber 11 for dust removal and discharges clean air. The first fan blade 2 has a low speed position and a high speed position, and the first fan blade 2 can switch between the low speed position and the high speed position to adjust the rotation speed of the first fan blade 2.

[0042] According to the ventilation and dust removal device for the excavation working face of the embodiment of the present invention, the first drive 3 drives the first blade 2 to rotate through the speed regulating component 4, so as to suck the dust-containing air of the excavation working face through the air inlet 12 to the accommodating chamber 11 of the dust removal box 1 for dust removal treatment, and the treated clean air is discharged from the air outlet 13, thereby realizing ventilation and dust removal of the excavation working face and ensuring the working safety of the operators, wherein the speed regulating component 4 can switch the first blade 2 between the low speed position and the high speed position, so as to adjust the air quality (i.e. The rotation speed of the first fan blade 2 is automatically and flexibly adjusted according to the dust concentration situation. When the air quality is poor, the first fan blade 2 is located at a high-speed position to increase the air supply to the dust removal box 1, thereby ensuring high-power operation of the device. When the air quality is good, the first fan blade 2 is located at a low-speed position to reduce the air supply to the dust removal box 1, thereby maintaining low-power operation of the device. Therefore, compared with the related art, the present invention can automatically adjust the air supply volume by changing the rotation speed of the first fan blade 2, so as to realize the adjustment of the operating power of the device, thereby ensuring the ventilation and dust removal efficiency of the excavation working face and reducing energy consumption.

[0043] In other words, the present invention can change the air supply volume by adjusting the rotation speed of the first fan blade 2 through the speed regulating component 4, so as to meet the ventilation needs of the excavation working face at different stages. When the excavation speed is faster and the dust concentration is higher, the rotation speed of the first fan blade 2 can be increased to increase the air supply volume. Otherwise, the air supply volume is reduced to avoid wasting energy and reduce operating costs. At the same time, it can also ensure that the excavation working face always obtains an appropriate amount of fresh air to improve ventilation efficiency.

[0044] It is understandable that the speed of the first blade 2 at the low speed position is lower than that at the high speed position. When the first blade 2 is driven to rotate by the first drive 3, the flow speed of the dusty air in the excavation working face can be accelerated, so that the dusty air can enter the dust removal box 1 for dust removal.

[0045] Specifically, the height direction of the dust removal box 1 may be the up-down direction in the figure. The accommodating cavity 11 may extend along the up-down direction in the figure.

[0046] It should be noted that the present invention can be applied in underground engineering excavation working environments such as mines and tunnels. A large amount of coal dust and rock dust will be generated during the excavation process. These dusts are suspended in the air and can easily cause harm to the respiratory system and eyes of the workers. In addition, the excavation working face is usually deep underground with poor ventilation conditions, so it is necessary to rely on ventilation and dust removal equipment to provide fresh air and remove dirty air.

[0047] like Figure 3 and Figure 4 As shown, in some embodiments, the speed regulating assembly 4 includes a speed regulating box 41 , a driving shaft 42 and a telescopic cylinder 43 .

[0048] The speed regulating box 41 is installed outside the dust removal box 1, the driving shaft 42 is pivotally installed in the speed regulating box 41 and is transmission-connected to the first drive 3, and two driving gears 44 are sleeved on the driving shaft 42 along the axial direction of the driving shaft 42.

[0049] Among them, the cylinder body of the telescopic cylinder 43 is connected to the speed regulating box 41, the piston rod of the telescopic cylinder 43 is connected to the first fan blade 2 through the adjusting shaft 45, the first fan blade 2 is located outside the speed regulating box 41, the adjusting shaft 45 is pivotally connected to the speed regulating box 41 and is at least partially located outside the speed regulating box 41, and the first driven gear 46 and the second driven gear 47 are sleeved along the axial interval of the adjusting shaft 45.

[0050] The telescopic cylinder 43 can push and pull the adjusting shaft 45 relative to the speed regulating box 41 to slide along the axial direction of the adjusting shaft 45, so that the first driven gear 46 and the second driven gear 47 are engaged with the corresponding driving gear 44 in turn, so that the first fan blade 2 is switched between the low speed position and the high speed position.

[0051] It can be understood that when the first fan blade 2 needs to switch between the low speed position and the high speed position, the first drive 3 can be closed first, and then the telescopic cylinder 43 can be extended and retracted to change the position of the first driven gear 46 and the second driven gear 47 thereon, so that the first driven gear 46 is meshed with the corresponding driving gear 44 for transmission, and the second driven gear 47 and the driving gear 44 are arranged at intervals along the axial direction of the adjusting shaft 45; or the second driven gear 47 is meshed with the corresponding driving gear 44 for transmission, and the first driven gear 46 and the driving gear 44 are arranged at intervals along the axial direction of the adjusting shaft 45. After completing the adjustment of the speed regulating component 4, the first drive 3 is started, and the first drive 3 can drive the first fan blade 2 to rotate at a low speed or a high speed, so as to realize automatic adjustment of the air supply volume. In addition, by making the first drive 3 rotate in the opposite direction and driving the first fan blade 2 to reverse, fresh air from the outside can also be input into the excavation working face to provide fresh air for the workers and realize ventilation of the excavation working face. At the same time, integrating the speed regulating component 4 into the speed regulating box 41 can reduce the erosion and damage of the speed regulating component 4 by the external environment, thereby ensuring the service life of the speed regulating component 4.

[0052] Specifically, the first drive 3 can also be installed in the speed regulating box 41. The first driven gear 46 can be a large gear, and the second driven gear 47 can be a small gear, that is, the pitch circle diameter of the first driven gear 46 is larger than the pitch circle diameter of the second driven gear 47. At this time, the pitch circle diameter of the driving gear 44 meshing with the first driven gear 46 is smaller than the pitch circle diameter of the driving gear 44 meshing with the second driven gear 47. Therefore, when the first driven gear 46 is meshing with the corresponding driving gear 44, the first fan blade 2 is located at a low speed position, and when the second driven gear 47 is meshing with the corresponding driving gear 44, the first fan blade 2 is located at a high speed position. The telescopic cylinder 43 may not be limited to one of an electric cylinder, a hydraulic cylinder, a pneumatic cylinder and an oil cylinder. The axial direction of the adjusting shaft 45 may be consistent with the axial direction of the driving shaft 42. The adjusting shaft 45 may be a spline shaft to ensure that the telescopic cylinder 43 can push and pull the adjusting shaft 45 along the axial direction of the adjusting shaft 45 without affecting the rotation of the adjusting shaft 45 driven by the first drive 3 and the gear assembly in the speed regulating box 41 .

[0053] Taking the figure as an example, the telescopic cylinder 43 may be located above the first drive 3 , and at this time, the adjustment shaft 45 may be located above the driving shaft 42 .

[0054] like Figure 1 As shown, in some embodiments, the air inlet 12 and the air outlet 13 are arranged relatively along a first direction, and at least one of the air inlet 12 and the air outlet 13 is connected to the excavation working face through the ventilation pipe 5. The ventilation pipe 5 can be extended and retracted along the first direction to adjust the length of the ventilation pipe 5, so that the ventilation and dust removal device can adapt to the ventilation and dust removal operations at different excavation depths, and can meet the layout requirements in different spaces, thereby improving the flexibility and adaptability of the ventilation and dust removal device.

[0055] Specifically, the first direction can be the left-right direction in the figure. The air inlet 12 is connected to the excavation working face through the ventilation pipe 5; or the air outlet 13 is connected to the excavation working face through the ventilation pipe 5; or both the air inlet 12 and the air outlet 13 are connected to the excavation working face through the ventilation pipe 5. Preferably, both the air inlet 12 and the air outlet 13 are connected to the excavation working face through the ventilation pipe 5 to further broaden the application scope of the ventilation and dust removal device.

[0056] like Figure 2 As shown, in some embodiments, the air outlet 13 is connected to the excavation working face through the ventilation pipe 5, and the first fan blade 2 and the speed regulating box 41 are both located in the end of the ventilation pipe 5 away from the air outlet 13 to increase the flow rate of the dust-laden air in the excavation working face, so that the dust-laden air can enter the accommodating chamber 11 through the air inlet 12 for dust reduction.

[0057] like Figure 2As shown, in some embodiments, the ventilation pipe 5 includes a plurality of sleeves 51, and the sleeves 51 are hollow pipes with openings at both ends. The plurality of sleeves 51 are sequentially sleeved from the inside to the outside, and any two adjacent sleeves 51 are slidably connected along the first direction. The ventilation pipe 5 is designed to be slidably connected by a plurality of sleeves 51 to achieve telescopic expansion, which can ensure that the device performs good ventilation and dust removal operations on the excavation working face, and can flexibly adjust the length of the ventilation pipe 5, and the overall structure is compact.

[0058] Taking the figure as an example, there are three sleeves 51, and the three sleeves 51 are sequentially sleeved and connected from the inside to the outside.

[0059] Furthermore, a seal 52 is sandwiched between the peripheral walls of any two adjacent sleeves 51 to seal the gap between the peripheral walls of any two adjacent sleeves 51 to prevent air and dust from overflowing from the gap between the sleeves 51 .

[0060] Specifically, the sealing member 52 is not limited to a sealing ring. In any two adjacent sleeves 51 , the sealing ring may be sleeved on the outer peripheral wall surface of the inner sleeve 51 , or the sealing ring may be embedded on the inner peripheral wall surface of the outer sleeve 51 .

[0061] Further, the outer contour line of the cross section of the sleeve 51 is one of a rectangle, a circle and any closed curve, and preferably the outer contour line of the cross section of the sleeve 51 is a rectangle, so as to adjust the length of the ventilation pipe 5 along the first direction and reduce the difficulty of processing the ventilation pipe 5. For example, the cross section of the ventilation pipe 5 is a rectangular annular surface, that is, the ventilation pipe 5 is a square pipe.

[0062] like Figure 2 and Figure 5 As shown, in some embodiments, of any two adjacent sleeves 51 , the end of the outer sleeve 51 facing away from the dust removal box 1 is provided with a walking assembly 53 , and the inner sleeve 51 is provided with a walking track 54 extending along the first direction.

[0063] The walking assembly 53 includes a mounting frame 531, a second drive 532 and a walking wheel 533. The mounting frame 531 is connected to the external sleeve 51. The second drive 532 is installed on the mounting frame 531 and is transmission-connected to the walking wheel 533. The walking wheel 533 is rollingly connected to the walking track 54 so that the internal sleeve 51 can extend or retract along the first direction relative to the external sleeve 51.

[0064] It can be understood that the second drive 532 can drive the traveling wheel 533 to rotate, so that the traveling wheel 533 can travel along the traveling track 54, thereby realizing automatic adjustment of the overall length of any two adjacent sleeves 51 and ensuring operation efficiency.

[0065] Specifically, the running wheel 533 can be a gear. The running track 54 can be a toothed track. The gear and the toothed track can be meshed for transmission, similar to a gear rack transmission structure, to achieve automatic sliding between any two adjacent sleeves 51, and after adjusting to any position between the two, they can be reliably locked by the toothed structure.

[0066] Furthermore, each sleeve 51 may be provided with a fixing frame 55 at the end away from the dust removal box 1, and the fixing frame 55 is suitable for being connected to the excavation working face, so that the device can be fixed in the excavation working face through the fixing frame 55 to ensure the stability of the device during the ventilation and dust removal operation. The fixing frame 55 may extend in the up and down direction in the figure.

[0067] like Figure 2 As shown, in some embodiments, the ventilation duct 5 is provided with a dust filter 56 , which is arranged adjacent to the dust removal box 1 and is suitable for filtering the air in the ventilation duct 5 .

[0068] It can be understood that the dust filter 56 and the accommodating chamber 11 cooperate to achieve at least two levels of dust removal treatment for dust-containing air. For example, when the air inlet 12 and the air outlet 13 are both connected to the excavation working face through the ventilation pipe 5, the dust-containing air can be sequentially subjected to the first-level dust removal by the dust filter 56 in the ventilation pipe 5 connected to the air inlet 12, the second-level dust removal by the accommodating chamber 11, and the third-level dust removal by the dust filter 56 in the ventilation pipe 5 connected to the air outlet 13, so as to enhance the dust reduction effect on the dust-containing air.

[0069] Furthermore, the dust filter 56 is detachably connected to the ventilation duct 5, which is convenient for regularly removing the dust filter 56 for cleaning it, and when any one of the two connected parts is damaged and fails, the ventilation duct 5 can work normally by simply replacing the corresponding damaged part, without scrapping the entire ventilation duct 5, thereby effectively reducing the maintenance cost of the ventilation duct 5.

[0070] For example, the dust filter 56 can be inserted into the ventilation duct 5 from top to bottom. At this time, the inner wall surface of the ventilation duct 5 is provided with a mounting groove, and the top wall of the ventilation duct 5 is provided with an opening connected to the inner cavity of the ventilation duct 5, so that the filter can be inserted into the ventilation duct 5 from the opening.

[0071] like Figure 1 As shown, in some embodiments, the air inlet 12 is closer to the end hole of the excavation working face than the air outlet 13, and the air inlet 12 is provided with a dust sensor 6, which is used to monitor the dust concentration of the excavation working face.

[0072] The device may also be provided with a controller, which is electrically connected to the first drive 3, the telescopic cylinder 43, the second drive 532 and the dust sensor 6. The controller can control the working conditions of the first drive 3 and the telescopic cylinder 43 according to the dust concentration information fed back by the dust sensor 6, so as to automatically adjust the working condition of the first fan blade 2 in real time, reduce energy consumption, ensure good ventilation and dust removal effects, and further improve the automation performance of the device.

[0073] like Figure 6 and Figure 7 As shown, in some embodiments, the ventilation and dust removal device further includes a dust reduction nozzle 7, which is installed at the top of the accommodating chamber 11, and is connected to an external water source through a water inlet pipe 71, so that the dust reduction nozzle 7 can reduce dust from the dust-containing gas in the accommodating chamber 11, and the dust removal box 1 is also provided with a sewage outlet connected to the accommodating chamber 11, through which dust-containing waste liquid can be discharged to ensure the continuous operation of the entire ventilation and dust removal operation. Among them, both the water inlet pipe 71 and the sewage outlet can be provided with a control valve.

[0074] It should be noted that the specific structure and working principle of the dust suppression nozzle 7 can adopt the existing technology in the field, which will not be elaborated here.

[0075] like Figure 7 As shown, in some embodiments, the ventilation and dust removal device also includes a third drive 8, a rotating tube 81 and a stirring frame 82. The third drive 8 is connected to the rotating tube 81 by transmission. The rotating tube 81 is provided with a stirring frame 82 and a dust reduction nozzle 7. The rotating tube 81 and the stirring frame 82 can be pivotally installed in the accommodating cavity 11, and the direction of the pivot axis of the rotating tube 81 is consistent with the height direction of the dust removal box 1.

[0076] It can be understood that the third drive 8 can drive the rotating tube 81 to rotate, so that the rotating tube 81 rotates with the stirring frame 82 and the dust reduction nozzle 7 in the accommodating chamber 11. At this time, the stirring frame 82 can mix the dust-containing air with the aqueous solution at the bottom of the accommodating chamber 11 to ensure the dust removal effect, and the dust reduction nozzle 7 rotating with the rotating tube 81 can achieve uniform dust reduction in various places in the accommodating chamber 11.

[0077] Specifically, the rotating tube 81 may extend along the height direction of the dust removal box 1. The stirring frame 82 may be adjacent to the bottom of the accommodating chamber 11.

[0078] It should be noted that the first drive 3, the second drive 532 and the third drive 8 can all be drive motors.

[0079] like Figure 7As shown, in some embodiments, the ventilation and dust removal device also includes a diverter pipe 83, which is connected to the rotating tube 81 and has multiple diverter pipes 83. The multiple diverter pipes 83 are arranged at intervals along the circumference of the rotating tube 81. Each diverter pipe 83 is provided with at least one dust reduction nozzle 7. The dust reduction nozzle 7 is connected to the water inlet pipe 71 through the diverter pipe 83, so that the dust-laden air can be fully dusted, the dust removal effect is enhanced, and the dust removal efficiency is improved.

[0080] Preferably, a plurality of diversion pipes 83 are arranged at equal intervals along the circumference of the rotating tube 81, and a plurality of dust reduction nozzles 7 are provided at equal intervals along the axial direction of each diversion pipe 83 to evenly spray water in the accommodating chamber 11. At the same time, when the rotating tube 81 rotates with the diversion pipes 83, the dust reduction nozzles 7 will rotate under the thrust of the sprayed water, so that the water is sprayed more evenly and comprehensively in the accommodating chamber 11, thereby ensuring that the dust-laden air is fully removed.

[0081] like Figure 8 As shown, in some embodiments, the ventilation and dust removal device also includes a second fan blade 9, which is connected to the rotating tube 81 through a transmission assembly 91 and is located between the dust reduction nozzle 7 and the stirring frame 82 in the height direction of the dust removal box 1. The second fan blade 9 is pivotally mounted in the accommodating cavity 11, and the direction of the pivot axis of the second fan blade 9 is perpendicular to the direction of the pivot axis of the rotating tube 81.

[0082] There are two second blades 9 , one of which is disposed adjacent to the air inlet 12 , and the other of which is disposed adjacent to the air outlet 13 , and the two second blades 9 rotate in opposite directions to draw dusty air from the excavation working face into the accommodating chamber 11 .

[0083] It can be understood that the second fan blade 9 can rotate under the transmission action of the transmission assembly 91 to assist in drawing dust-laden air into the accommodating chamber 11 for dust reduction, thereby further improving the dust removal efficiency.

[0084] Specifically, the transmission assembly 91 may include a storage box, a driving bevel gear, a first driven bevel gear, and a second driven bevel gear. The storage box is sleeved on the rotating tube 81 and fixed in the accommodating chamber 11. The driving bevel gear, the first driven bevel gear, and the second driven bevel gear are all located in the storage box. The driving bevel gear is coaxially sleeved on the rotating tube 81 and can rotate with the rotating tube 81. The first driven bevel gear and the second driven bevel gear are both meshed with the driving bevel gear for transmission. The first driven bevel gear is connected to the first blade 2 for transmission, and the second driven bevel gear is connected to the second blade 9 for transmission. The first driven bevel gear and the second driven bevel gear have opposite rotation directions, and the first blade 2 and the second blade 9 can generate the same wind direction in the accommodating chamber 11.

[0085] like Figure 6 and Figure 7As shown, in some embodiments, the ventilation and dust removal device also includes a guide plate 14, which is connected to the inner circumferential wall of the accommodating chamber 11 at an angle and extends in a direction from the inner circumferential wall of the accommodating chamber 11 toward the inner bottom wall, that is, the guide plate 14 is inclined downward, and the guide plate 14 is located between the dust reduction nozzle 7 and the second fan blade 9 in the height direction of the dust removal box 1.

[0086] There are two guide plates 14 , one of which is located above the air inlet 12 , and the other is located above the air outlet 13 , so as to guide the dusty air to the bottom of the accommodating chamber 11 .

[0087] like Figure 6 and Figure 7 As shown, in some embodiments, the ventilation and dust removal device also includes a guide block 15, which is installed in the accommodating chamber 11 and together with the inner bottom wall of the accommodating chamber 11 defines a storage chamber, the third drive 8 is located in the storage chamber, and the guide block 15 is provided with a guide surface, which extends obliquely along the direction from the rotating tube 81 toward the inner bottom wall of the accommodating chamber 11.

[0088] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0090] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0092] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0093] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A ventilation and dust removal device for an excavation working face, characterized in that: include: A dust removal box having a containing cavity and provided with an air inlet and an air outlet communicating with the containing cavity; and A first fan blade and a first drive, wherein the first fan blade is pivotally mounted on the outside of the dust removal box and adjacent to the air outlet, and the first drive is transmission-connected to the first fan blade through a speed regulating assembly so that the first fan blade introduces dust-laden air from the excavation working face into the accommodating chamber for dust removal and discharges clean air, and the first fan blade has a low speed position and a high speed position, and the first fan blade can switch between the low speed position and the high speed position to adjust the rotation speed of the first fan blade.

2. The ventilation and dust removal device for excavation working face according to claim 1, characterized in that: The speed regulating component comprises: A speed regulating box and a driving shaft, wherein the speed regulating box is mounted outside the dust removal box, the driving shaft is pivotally mounted in the speed regulating box and is connected to the first drive transmission, and two driving gears are sleeved on the driving shaft at intervals along the axial direction of the driving shaft; and A telescopic cylinder, wherein the cylinder body of the telescopic cylinder is connected to the speed regulating box, the piston rod of the telescopic cylinder is connected to the first fan blade through an adjusting shaft, the first fan blade is located outside the speed regulating box, the adjusting shaft is pivotally connected to the speed regulating box and is at least partially located outside the speed regulating box, and a first driven gear and a second driven gear are sleeved on the adjusting shaft along the axial interval of the adjusting shaft; The telescopic cylinder can push and pull the adjusting shaft relative to the speed regulating box to slide along the axial direction of the adjusting shaft, so that the first driven gear and the second driven gear are engaged with the corresponding driving gear in turn, so that the first fan blade switches between the low speed position and the high speed position.

3. The ventilation and dust removal device for excavation working face according to claim 2, characterized in that: The air inlet and the air outlet are arranged relatively to each other along a first direction, and at least one of the air inlet and the air outlet is connected to the excavation working face through a ventilation pipe, and the ventilation pipe can be extended and retracted along the first direction to adjust the length of the ventilation pipe.

4. The ventilation and dust removal device for excavation working face according to claim 3, characterized in that: The ventilation pipe comprises a plurality of sleeves, which are sequentially sleeved from the inside to the outside, and any two adjacent sleeves are slidably connected along the first direction; And / or, a sealing member is sandwiched between the peripheral wall surfaces of any two adjacent sleeves to seal the gap between the peripheral wall surfaces of any two adjacent sleeves; And / or, the outer contour line of the cross section of the sleeve is one of a rectangle, a circle and any closed curve.

5. The ventilation and dust removal device for excavation working face according to claim 4, characterized in that: Among any two adjacent sleeves, the end of the outer sleeve facing away from the dust removal box is provided with a walking assembly, and the inner sleeve is provided with a walking track extending along the first direction; The walking assembly includes a mounting frame, a second drive and a walking wheel, the mounting frame is connected to the external sleeve, the second drive is installed on the mounting frame and is transmission-connected to the walking wheel, and the walking wheel is rollingly connected to the walking track so that the internal sleeve can extend or retract relative to the external sleeve along the first direction.

6. The ventilation and dust removal device for excavation working face according to claim 3, characterized in that: The ventilation duct is provided with a dust filter, which is arranged adjacent to the dust removal box and is suitable for filtering the air in the ventilation duct; And / or, the dust filter is detachably connected to the ventilation pipe.

7. The ventilation and dust removal device for excavation working face according to any one of claims 1 to 6, characterized in that: The air inlet is closer to the terminal end of the excavation working face than the air outlet. The air inlet is provided with a dust sensor, and the dust sensor is used to monitor the dust concentration of the excavation working face.

8. The ventilation and dust removal device for excavation working face according to claim 7, characterized in that: Also includes: A dust suppression nozzle, the dust suppression nozzle is installed at the top of the accommodating chamber, the dust suppression nozzle is connected to an external water source through a water inlet pipe, so that the dust suppression nozzle can reduce dust from the dust-containing gas in the accommodating chamber, and the dust removal box is also provided with a sewage outlet connected to the accommodating chamber; and / or A third drive, a rotating tube and a stirring frame, wherein the third drive is transmission-connected to the rotating tube, the stirring frame and the dust suppression nozzle are provided on the rotating tube, the rotating tube and the stirring frame can be pivotally mounted in the accommodating cavity, and the direction of the pivot axis of the rotating tube is consistent with the height direction of the dust removal box.

9. The ventilation and dust removal device for excavation working face according to claim 8, characterized in that: It also includes a diversion pipe, which is connected to the rotating pipe and has multiple diversion pipes. The multiple diversion pipes are arranged at intervals along the circumference of the rotating pipe. Each of the diversion pipes is provided with at least one dust reduction nozzle, and the dust reduction nozzle is connected to the water inlet pipe through the diversion pipe.

10. The ventilation and dust removal device for excavation working face according to claim 8 or 9, characterized in that: It also includes a second fan blade, which is connected to the rotating tube through a transmission assembly and is located between the dust suppression nozzle and the stirring frame in the height direction of the dust removal box. The second fan blade is pivotally mounted in the accommodating cavity, and the direction of the pivot axis of the second fan blade is perpendicular to the direction of the pivot axis of the rotating tube; There are two second blades, one of which is arranged adjacent to the air inlet, and the other is arranged adjacent to the air outlet, and the two second blades rotate in opposite directions to draw the dust-laden air from the excavation working face into the accommodating chamber.

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