Dust suppression device applied to double-car dumper foundation pit

Abstract

The application discloses a dust suppression equipment applied to a double-car tipping machine foundation pit, and belongs to the dust suppression technical field, and the technical scheme points are as follows: the upper layer dust suppression unit sprays water mist into the foundation pit for dust suppression; the lower layer dust suppression unit comprises a circumferential lower layer waterway assembly, a second spraying box and a second spraying head, the second spraying head is provided with a water inlet and an air inlet, and is connected with a water supply device and an air supply device respectively; the middle layer air suction unit comprises an air suction main pipe which is arranged between the upper layer dust suppression unit and the lower layer dust suppression unit and is continuously distributed along the periphery of the foundation pit, a plurality of air suction branch pipes which are communicated with the air suction main pipe, and a conveying pipe group which is connected with the air suction main pipe at one end and connected with the air supply device at the other end, the air suction branch pipes are connected with a filtering device, and the air supply device introduces filtered dust-containing wet air into the air inlet. The air blowing device is further arranged to blow air to the adjustable part of the second spraying box for dust removal. Through the design of multi-layer dust suppression, air suction and air blowing dust removal, timely and effective control of the flying dust is realized, and the reliability and stability of equipment operation are improved.

Description

Technical Field

[0001] This application relates to the field of dust suppression technology, and in particular to a dust suppression device used in the pit of a double-vehicle tipper. Background Technology

[0002] In industrial production, bulk material handling is an indispensable part of many industries, and tippers, with their efficient material tipping and unloading function, have become core equipment in the bulk material handling process. At ports, large quantities of bulk materials such as ore and coal are quickly unloaded by tippers, greatly improving cargo turnover efficiency. In mines, tippers accelerate ore transportation and processing, promoting the development and utilization of mineral resources. In power plants, they ensure a stable coal supply and guarantee the smooth operation of power generation. With the vigorous development of various industries, the application scope of tippers is constantly expanding, and their usage frequency is significantly increasing, playing a vital role in improving production efficiency and reducing labor costs, and powerfully promoting the prosperity of related industries.

[0003] To address the dust problem generated during tippler operations, several conventional methods have traditionally been employed. One approach is to install windbreak nets around the tippler, using their barrier effect to reduce the extent to which dust spreads outwards. Another common practice is to install mist cannons at the work site, spraying water mist to absorb dust particles in the air, thereby reducing dust concentration. Some companies also install dust suction hoods near the tippler to collect the raised dust into collection devices. Furthermore, some factories have added adjustable spray angle structures to their dust suppression equipment, improving the flexibility of dust suppression coverage.

[0004] However, while windbreak nets can block dust dispersion to some extent, they cannot effectively suppress dust generated inside the tipper, and their protective effect is greatly reduced in windy weather. Fog cannons have limited coverage and are ineffective against dust far from the spray area; furthermore, prolonged use can lead to water accumulation at the work site, affecting normal operations. Dust suction hoods can only collect a portion of the raised dust and cannot completely capture fine dust particles. In the high-concentration, continuous dust environment of the tipper pit, dust easily accumulates at the hinges of the spray box angle adjustment mechanism, causing rotational jamming and preventing smooth adjustment of the water mist coverage according to the unloading volume. This further reduces the dust suppression effect and requires frequent shutdowns for manual cleaning, increasing maintenance costs and impacting production efficiency. Summary of the Invention

[0005] To address the problems of poor dust suppression effect and easy dust accumulation and blockage in existing double-car tipper pit dust suppression equipment, which affects production efficiency, this invention provides a dust suppression device for use in double-car tipper pits.

[0006] The dust suppression device for use in the pit of a double-vehicle tipper provided by this invention adopts the following technical solution: A dust suppression device for use in the pit of a double-vehicle tipper includes: The upper dust suppression unit is used to suppress the outward spread of dust in the foundation pit. The upper dust suppression unit includes an upper water channel assembly, a first spray box and a first nozzle. The upper water channel assembly is arranged in the circumferential area of ​​the foundation pit and is connected to a water supply device. Multiple first spray boxes are provided and arranged at intervals along the pipeline of the upper water channel assembly. Multiple first nozzles are fixedly installed on each first spray box for spraying water mist into the foundation pit to form a dust suppression covering layer. The lower dust suppression unit includes a lower water system assembly, a second spray box, and second nozzles. The lower water system assembly is arranged in the circumferential area of ​​the foundation pit and below the upper water system assembly. The lower water system assembly is connected to the water supply device. Multiple second spray boxes are arranged at intervals along the pipeline direction of the lower water system assembly. Each second spray box is connected to multiple second nozzles for spraying water mist into the foundation pit. Each second nozzle is equipped with a gas-liquid mixing chamber, a water inlet, and an air inlet. The water inlet is connected to the lower water system assembly through the second spray box, and the air inlet is connected to an air supply device. The middle-layer suction unit is used to draw in low-concentration dust-laden humid air pre-wetted by water mist from the middle of the foundation pit. The middle-layer suction unit includes a main suction pipe, suction branch pipes, and a delivery pipe assembly. The main suction pipe is located between the upper and lower dust suppression units and is connected to the side wall of the foundation pit. The main suction pipe is continuously distributed around the perimeter of the foundation pit. Multiple suction branch pipes are provided and spaced out around the perimeter of the foundation pit, all connected to the main suction pipe. Each suction branch pipe is connected to a filter device for pre-filtering the drawn-in dust-laden humid air. One end of the delivery pipe assembly is connected to the main suction pipe. The main pipe is connected to the main air supply device, and the other end is connected to the air supply device. The air supply device includes an air compressor, an air tank, a venturi tube, and an air filter. The inlet end of the air compressor is connected to the atmosphere, and the outlet end is connected to the inlet end of the air tank. The outlet end of the air tank is connected to the first inlet end of the venturi tube. The second inlet end of the venturi tube is connected to the end of the delivery pipe assembly away from the main air intake pipe, and the outlet end is connected to the inlet end of the air filter. The outlet end of the air filter is connected to the air inlet, which is used to introduce filtered dust-laden humid air into the air inlet. It also includes an installation device and an air blowing device. The second spray box is hinged to the side wall of the pit via the installation device to achieve an adjustable angle. The air blowing nozzle of the air blowing device is aligned with the hinge part of the installation device for indirect air blowing to the hinge part.

[0007] By adopting the above technical solution, the upper water channel components, the first spray box, and the first nozzle of the upper dust suppression unit are arranged around the perimeter of the foundation pit, which can spray water mist into the foundation pit to effectively suppress the outward spread of dust in the foundation pit. The lower water channel components, the second spray box, and the second nozzle of the lower dust suppression unit are also arranged around the perimeter of the foundation pit, which can spray water mist into the foundation pit and better achieve the dust suppression function. The middle air intake unit can draw in low-concentration dust-laden humid air pre-wetted by water mist from the middle of the foundation pit. The intake branch pipe is connected to a filter device to pre-filter the dust-laden humid air. At the same time, the air compressor, air tank, venturi tube, and air filter in the air supply device work together. The venturi tube can use the principle of fluid dynamics to fully mix the dust-laden humid air with the compressed air, improving the mixing efficiency. The air filter can further filter the dust-laden humid air, and finally introduce the filtered dust-laden humid air into the air inlet, enhancing the working efficiency and dust suppression effect of the entire dust suppression equipment. At the same time, the air nozzle blows air onto the hinge of the installation device, which can clean the dust at the hinge and ensure that the second spray box drives the second nozzle to rotate flexibly. This solves the problem of powder accumulation and jamming at the angle adjustment point of the second spray box, which affects production efficiency and improves the stability and reliability of the dust suppression equipment.

[0008] Preferably, the installation device includes a first installation component, a second installation component, and a third installation component. The first spray box is connected to the pit sidewall via the first installation component, the second spray box is connected to the pit sidewall via the third installation component, and the upper water channel component, the lower water channel component, or the air intake main pipe are all connected to the pit sidewall via the second installation component.

[0009] By adopting the above technical solution, the first spray box is connected to the side wall of the foundation pit using the first installation component, the second spray box is connected to the side wall of the foundation pit using the third installation component, and the upper water channel component, lower water channel component, or air intake pipe is connected to the foundation pit using the second installation component. This enables the stable installation of each component of the dust suppression equipment, ensuring normal operation of the equipment and dust suppression effect.

[0010] Preferably, the third installation component includes an installation box and a movable group, with three second spray boxes forming a group, and each group of two second spray boxes corresponding to one installation box, the installation box being fixedly connected to the side wall of the foundation pit; Each of the second spray boxes is connected to the movable group, which includes a first mounting plate and a second mounting plate. The first mounting plate is fixedly connected to the mounting box, and the second mounting plate is hinged to the first mounting plate. The second spray box is fixedly connected to its corresponding second mounting plate. The mounting box is connected to a control device, which is connected to the second mounting plate and is used to adjust the angle between the second mounting plate and the first mounting plate.

[0011] By adopting the above technical solution, during use, the mounting box is connected to the side wall of the foundation pit, the first mounting plate is connected to the mounting box, the second mounting plate is hinged to the first mounting plate, and the second spray box is fixedly connected to its corresponding second mounting plate. The angle of the second mounting plate is adjusted using a control device connected to the mounting box, thereby flexibly adjusting the angle of the second spray box. This allows the water mist sprayed by the first and second nozzles to better cover different areas of the foundation pit, effectively improving the dust suppression effect.

[0012] Preferably, the control device includes a motor, a synchronization component, and a control component. Each second mounting plate is connected to a control component. The control component includes a screw, a movable sleeve, and a pull rod. The motor and the screw are both located inside the mounting box. The motor is connected to the mounting box. Any corresponding screw in a set of second spray boxes is connected to the drive shaft of the motor. The movable sleeve is fitted onto the screw and threadedly connected to the screw. One end of the movable sleeve slides out of the mounting box and is hinged to the pull rod. The pull rod is connected to the second mounting plate and is used to drive the second mounting plate to rotate under the action of the movable sleeve. A set of synchronization components is provided for every two adjacent screws in a set of second spray boxes to achieve synchronous movement of the screws.

[0013] By adopting the above technical solution, when the motor is started, the motor drives the connected screw to rotate. The screw drives multiple screws in a set of second spray boxes to rotate synchronously through the synchronization component. At the same time, the screw drives the movable square sleeve connected to its own thread to slide along the screw. The movable square sleeve slides out of the mounting box and drives the pull rod that is hinged to it to move. The pull rod then drives the second mounting plate that is fixedly connected to it to rotate, which can realize the angle adjustment of the second mounting plate. This allows for easy adjustment of the angle of the second spray box according to actual needs, so as to achieve a better dust suppression effect.

[0014] Preferably, the control device further includes a dustproof component, and each of the movable square sleeves is correspondingly provided with the dustproof component. The dustproof component includes a dustproof box and a dustproof sleeve. The dustproof box is connected to the mounting box and is sleeved on the outside of the portion of the movable square sleeve that protrudes from the mounting box. The dustproof box has a through hole for the movement of the pull rod. The dustproof sleeve is sleeved on the pull rod. The first end of the dustproof sleeve is connected to the dustproof box and seals the through hole. The second end of the dustproof sleeve has a constricted structure and is sealed to the side wall of the pull rod to form a closed dustproof space.

[0015] By adopting the above technical solution, dust can be effectively prevented from entering the mounting box and affecting the normal operation of the moving sleeve and screw, avoiding control device failure due to dust accumulation, and ensuring the stability and reliability of the second mounting plate angle adjustment function.

[0016] Preferably, the blowing device includes an air bladder, an air nozzle, and an air squeezing assembly. The air bladder is located below the screw and connected to the inner bottom wall of the mounting box. The air inlet of the air nozzle is connected to the interior of the air bladder, and the air outlet passes through the mounting box and faces the hinge between the first mounting plate and the second mounting plate, for blowing air onto the hinge. The air squeezing assembly is connected to the movable sleeve and can selectively squeeze the air bladder.

[0017] By adopting the above technical solution, during the operation of the dust suppression equipment, when the moving sleeve moves, the air squeezing component will selectively squeeze the air bladder as the moving sleeve moves. The gas in the air bladder will blow air through the air nozzle to the hinge between the first mounting plate and the second mounting plate, which can clean dust and other impurities, ensure the flexible rotation of the hinge, improve the stability and reliability of the installation device, and thus ensure the normal operation of the entire dust suppression equipment.

[0018] Preferably, the extrusion assembly includes a protrusion, a cam, a vertical plate, a first positioning slider, and a second positioning slider. The protrusion is fixedly connected to the movable sleeve. The cam is sleeved on the outer periphery of the movable sleeve and the screw. A spiral drive groove is formed on the inner wall of the cam. The protrusion is disposed in the drive groove and slides in cooperation with the cam. The vertical plate is connected to the mounting box, and an installation space is formed between the vertical plate and the inner wall of the mounting box. The cam is disposed in the installation space. The extrusion plate is connected to the cam. When the cam rotates, the extrusion plate pushes downward and extrudes the airbag. The first positioning slider and the second positioning slider are respectively connected to the two ends of the cam axis. A first positioning groove is formed on the inner wall of the mounting box, and the first positioning slider slides in cooperation with the first positioning groove. A second positioning groove is formed on the vertical plate, and the second positioning slider slides in cooperation with the second positioning groove.

[0019] By adopting the above technical solution, during use, when the movable sleeve moves on the screw, the protrusion fixedly connected to the movable sleeve slides within the spiral drive groove on the inner wall of the cam, causing the cam to rotate within the installation space. The cam drives the extrusion plate downwards and extrudes the airbag. This structure allows the extrusion assembly to stably extrude the airbag, thereby directing the air nozzle to blow air towards the hinge between the first and second mounting plates, preventing dust accumulation at the hinge and ensuring flexible rotation at the hinge. Simultaneously, the first positioning slider slides into the first positioning groove on the inner wall of the mounting box, and the second positioning slider slides into the second positioning groove on the vertical plate, ensuring the stability of the cam rotation.

[0020] Preferably, the water supply device includes a water tank, a booster pump, a water filter, and a main diversion valve. The water tank is connected to an inlet pipe and an outlet pipe. The inlet pipe is used to connect to a water source. The inlet end of the booster pump is connected to the outlet pipe of the water tank. The inlet end of the water filter is connected to the outlet end of the booster pump. The inlet end of the main diversion valve is connected to the outlet end of the water filter. The first outlet end of the main diversion valve is connected to the upper water circuit assembly, and the second outlet end is connected to the lower water circuit assembly.

[0021] By adopting the above technical solutions, the water tank can store water, the inlet pipe connects to the water source to ensure a continuous water supply to the water tank, the booster pump can increase the water pressure, the water filter can filter the water to avoid impurities affecting the spraying effect, and the main diversion valve can divert the filtered water to the upper and lower water circuit components, providing appropriate pressure and clean water source for the upper and lower dust suppression units, ensuring the normal operation of the dust suppression equipment.

[0022] Preferably, the spray direction of the second nozzle is set to be obliquely upward, so as to form an upward water mist coverage area inside the pit; the angle between the second nozzle and the horizontal plane is 5 degrees to 30 degrees.

[0023] By adopting the above technical solution, the spray direction of the second nozzle is set to face obliquely upward, which can form an upward water mist coverage area inside the foundation pit; by setting the angle between the second nozzle and the horizontal plane to 5 degrees to 30 degrees, the range of the upward water mist coverage area can be optimized, and dust in the foundation pit can be suppressed more effectively.

[0024] Preferably, the intake branch pipe has a bent structure, including an integrally formed and interconnected fixed section and intake section; the fixed section is connected to the intake main pipe, and the intake section is inclined downward from one end near the fixed section to the other end.

[0025] By adopting the above technical solution, the suction branch pipe is set as a bent structure, with the suction section inclined downwards, which can effectively block large particles of material and water mist splashed during the unloading process from directly entering the main suction pipe, reducing the risk of pipeline blockage; at the same time, it allows the dust-laden airflow to enter smoothly, reducing suction resistance, ensuring uniform and stable suction, and preventing dust from being sucked in before the spray fully covers it, thus improving the overall operational reliability of the dust suppression system.

[0026] In summary, the present invention has the following beneficial effects: The upper dust suppression unit sprays water mist into the pit through the upper water circuit assembly, the first spray box, and the first nozzle to suppress the outward spread of dust from the pit. The lower dust suppression unit has a water inlet and an air inlet inside the second nozzle, which introduces filtered dust-laden humid air to enhance the dust suppression effect. The middle air intake unit draws in low-concentration dust-laden humid air pre-wetted by water mist from the middle of the pit, performs pre-filtration, and then introduces the filtered air into the air inlet, realizing the reuse of dust and further dust suppression. At the same time, the air compressor, air tank, venturi tube, and air filter in the air supply device work together. The venturi tube can use the principle of fluid dynamics to fully mix the dust-laden humid air with compressed air, improving the mixing efficiency. The air filter can further filter the dust-laden humid air, and finally introduce the filtered dust-laden humid air into the air inlet, enhancing the working efficiency and dust suppression effect of the entire dust suppression equipment. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of a dust suppression device used in the pit of a double-vehicle tipper.

[0028] Figure 2 This is a schematic diagram showing the locations of the upper water system components, the middle air intake unit, the lower water system components, the air supply device, and the water supply device.

[0029] Figure 3 This is a structural diagram of the upper dust suppression unit and the lower dust suppression unit.

[0030] Figure 4 This is a schematic diagram showing the location of the filter device.

[0031] Figure 5 This is a structural diagram of the first and second mounting components.

[0032] Figure 6 This is a structural diagram of the third mounting component.

[0033] Figure 7 This is an exploded view of the screw and the movable sleeve.

[0034] Figure 8 This is the front view of the third installation component.

[0035] Figure 9 yes Figure 8 A cross-sectional view along the AA direction.

[0036] Explanation of reference numerals in the attached figures: 1. Upper dust suppression unit; 11. Upper water system assembly; 111. Upper main pipe; 112. First diversion valve; 113. First branch pipe; 114. Second branch pipe; 12. First spray box; 13. First nozzle; 2. Lower dust suppression unit; 21. Lower water system assembly; 211. Lower main pipe; 212. Second diversion valve; 213. Third branch pipe; 214. Fourth branch pipe; 22. Second spray box; 23. Second nozzle; 3. Middle air intake Unit; 31. Main intake pipe; 32. Intake branch pipe; 33. Delivery pipe assembly; 4. Filter device; 5. Water supply device; 51. Water tank; 52. Booster pump; 53. Water filter; 54. Main branch valve; 6. Air supply device; 61. Air compressor; 62. Air storage tank; 63. Venturi tube; 64. Air filter; 65. Main air pipe; 66. Branch air pipe; 7. Mounting device; 71. First mounting assembly; 711. Mounting bracket 712. First fixing plate; 713. Second fixing plate; 72. Second mounting assembly; 721. Bracket; 722. Pipe clamp; 723. Fixing bolt; 73. Third mounting assembly; 731. Mounting box; 7311. First positioning slide; 732. First mounting plate; 733. Second mounting plate; 8. Control device; 81. Motor; 82. Synchronization assembly; 821. Sprocket; 822. Chain; 83. Control assembly; 831. Screw 832. Rod; 833. Moving square sleeve; 84. Pull rod; 85. Dustproof assembly; 86. Dustproof box; 87. Dustproof cover; 98. Air blowing device; 99. Airbag; 90. Air blowing nozzle; 91. Air squeezing assembly; 92. Protrusion; 93. Cam; 9321. Drive slide groove; 933. Vertical plate; 9331. Second positioning slide groove; 934. First positioning slider; 935. Second positioning slider; 936. Extrusion plate; 9361. Telescopic structure. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0038] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0039] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0040] A dust suppression device applied to the pit of a double-vehicle tippler, referring to Figure 1 , Figure 2 and Figure 3 The system includes an upper dust suppression unit 1, a lower dust suppression unit 2, and a middle air intake unit 3. The upper dust suppression unit 1 suppresses the outward spread of dust from the foundation pit, the lower dust suppression unit 2 sprays water mist into the pit, and the middle air intake unit 3 draws in low-concentration dust-laden humid air pre-wetted by water mist from the center of the pit. These three components work together to form a comprehensive dust suppression system, effectively reducing the dust concentration within the foundation pit. It also includes an installation device 7 and an air blowing device 9 (see reference). Figure 9 The lower dust suppression unit 2 is hinged to the side wall of the pit via the mounting device 7 to achieve angle adjustment, and the air blowing device 9 (see reference) Figure 9 It is used to indirectly blow air to remove dust from the hinged part of the mounting device 7.

[0041] Reference Figure 2 and Figure 3 The upper dust suppression unit 1 includes an upper water system assembly 11, a first spray box 12, and a first nozzle 13. The upper water system assembly 11 is arranged in the circumferential area of ​​the foundation pit and includes an upper main pipe 111, a first diversion valve 112, a first branch pipe 113, and a second branch pipe 114. The upper main pipe 111 is connected to a water supply device 5, which provides water to the upper water system assembly 11. The inlet end of the first diversion valve 112 is connected to the upper main pipe 111, the first outlet end of the first diversion valve 112 is connected to the first branch pipe 113, and the second outlet end is connected to the second branch pipe 114. The first branch pipe 113 and the second branch pipe 114 are laid together along the circumference of the foundation pit. The upper main pipe 111, the first branch pipe 113, and the second branch pipe 114 can all be made of corrosion-resistant metal pipes or high-strength plastic pipes to ensure the durability and sealing of the water system.

[0042] Reference Figure 2 and Figure 3Multiple first spray boxes 12 are provided, arranged at intervals along the pipeline of the upper water channel assembly 11, for example, one first spray box 12 is set at a certain distance. Each first spray box 12 is fixedly installed with multiple first nozzles 13, which are high-pressure fan-shaped nozzles. The first nozzles 13 are used to spray water mist into the foundation pit to achieve dust suppression. Through the uniform arrangement of multiple first nozzles 13, a relatively dense water mist covering layer can be formed above the foundation pit, effectively preventing dust from spreading outward.

[0043] Reference Figure 2 and Figure 3 The lower dust suppression unit 2 includes a lower water system assembly 21, a second spray box 22, and a second nozzle 23. The lower water system assembly 21 is arranged in the circumferential area of ​​the foundation pit, below the upper water system assembly 11. The lower water system assembly 21 is connected to the water supply device 5, which also provides water to the lower water system assembly 21. The material of the lower water system assembly 21 can be the same as that of the upper water system assembly 11. The lower water system assembly 21 includes a lower main pipe 211, a second diversion valve 212, a third branch pipe 213, and a fourth branch pipe 214. The lower main pipe 211 is connected to the water supply device 5. The inlet end of the second diversion valve 212 is connected to the lower main pipe 211. The first outlet end of the second diversion valve 212 is connected to the third branch pipe 213, and the second outlet end is connected to the fourth branch pipe 214. The third branch pipe 213 and the fourth branch pipe 214 are laid along the circumference of the foundation pit.

[0044] Reference Figure 2 and Figure 3 Multiple second spray boxes 22 are arranged at intervals along the pipeline of the lower water channel assembly 21, for example, one second spray box 22 is set at a certain distance. Each second spray box 22 is fixedly connected to multiple second nozzles 23. The second nozzles 23 are gas-liquid two-phase flow swirl nozzles and are equipped with a gas-liquid mixing chamber, a water inlet, and a gas inlet. The water inlet is connected to the lower water channel assembly 21 through the second spray box 22, and the gas inlet is connected to the air supply device 6 through the second spray box 22, so that the gas and liquid can be fully mixed in the mixing chamber inside the nozzle to form a uniform gas-liquid two-phase flow. After the action of the swirl structure, fine droplets are sprayed out from the nozzle outlet. The droplets have a small particle size and a wide coverage area, which can efficiently capture fine dust particles and achieve a second layer of dust suppression. The spray direction of the second nozzles 23 is set to be obliquely upward to form an upward water mist coverage area inside the pit. The angle between the second nozzles 23 and the horizontal plane is 5 degrees to 30 degrees, so that the water mist can better cover the inside of the pit and enhance the dust suppression effect.

[0045] Reference Figure 2 and Figure 3The middle-layer suction unit 3 includes a main suction pipe 31, suction branch pipes 32, and a conveying pipe assembly 33. The main suction pipe 31 is located between the upper dust suppression unit 1 and the lower dust suppression unit 2, connected to the side wall of the pit, and continuously distributed around the perimeter of the pit. Multiple suction branch pipes 32 are provided, spaced apart around the perimeter of the pit, and all are connected to the main suction pipe 31. The suction branch pipe 32 has a bent structure, including an integrally formed and interconnected fixed section and a suction section. The fixed section is fixedly connected to and communicates with the main suction pipe 31, and the suction section is inclined downwards from one end near the fixed section to the other. This structure facilitates better extraction of dust-laden, humid air from the middle of the pit.

[0046] Reference Figure 4 The intake branch pipe 32 is connected to a filter device 4, which is used to pre-filter the dusty and humid air being drawn in. The filter device 4 is located at the inlet of the intake section. The filter device 4 adopts a hydrophobic metal baffle filter or a gas-liquid separation filter, which can effectively intercept large particles of wet mud and splashes, and is not easily clogged by moisture.

[0047] Reference Figure 2 and Figure 3 The delivery pipe assembly 33 includes a main delivery pipe and delivery branch pipes. One end of the main delivery pipe is fixedly connected to and communicates with the delivery branch pipes. At least one delivery branch pipe is provided. In this embodiment, two delivery branch pipes are provided, and one end of each is fixedly connected to and communicates with the intake main pipe 31. The two delivery branch pipes are spaced apart. The other end of the delivery branch pipe is fixedly connected to and communicates with the main delivery pipe. The main delivery pipe is connected to the air supply device 6.

[0048] Reference Figure 1 and Figure 2 The air supply device 6 includes an air compressor 61, an air tank 62, a venturi tube 63, an air filter 64, a main air pipe 65, and branch air pipes 66. The inlet end of the air compressor 61 is connected to the atmosphere, and the outlet end of the air compressor 61 is fixedly connected to and communicates with the inlet end of the air tank 62. The outlet end of the air tank 62 is fixedly connected to and communicates with the first inlet end of the venturi tube 63. The second inlet end of the venturi tube 63 is fixedly connected to and communicates with the main delivery pipe, and its outlet end is fixedly connected to and communicates with the inlet end of the air filter 64. The outlet end of the air filter 64 is connected to the main air pipe 65.

[0049] The air compressor 61 has its air inlet located in a clean area outside the pit or equipped with an air intake dust screen to draw in clean air. After compression, the clean air is injected at high speed into the venturi tube 63 through the first inlet end. A negative pressure zone is generated in the throat inside the venturi tube, thereby creating a suction force at the second inlet end, which entrains the dust-laden, humid air drawn in by the middle-layer intake unit into the tube. This design avoids impeller wear and blockage caused by dust-laden, humid air directly passing through the fan or compressor.

[0050] Multiple air branch pipes 66 are provided, each connected to the air inlet through a corresponding second spray box 22, for introducing filtered dust-laden humid air into the air inlet, thus realizing the introduction of filtered dust-laden humid air into the air inlet as an air source and improving resource utilization.

[0051] The upper dust suppression unit 1 forms a water mist layer above the foundation pit, effectively blocking the outward spread of dust; the lower dust suppression unit 2 covers the upward-moving water mist area, which can better adsorb the dust in the foundation pit; the middle air intake unit 3 draws in low-concentration dust-laden humid air that has been pre-wetted by water mist and introduces the filtered air into the air inlet, realizing effective control of dust and recycling of resources. Compared with traditional dust suppression methods, it greatly improves dust suppression efficiency and solves the defects of existing dust suppression methods.

[0052] Reference Figure 1 and Figure 2 The water supply device 5 includes a water tank 51, a booster pump 52, a water filter 53, and a main diversion valve 54. The water tank 51 is connected to an inlet pipe and an outlet pipe. The inlet pipe is used to connect to the water source. The inlet end of the booster pump 52 is connected to the outlet pipe of the water tank 51. The inlet end of the water filter 53 is connected to the outlet end of the booster pump 52. The inlet end of the main diversion valve 54 is connected to the outlet end of the water filter 53. The first outlet end of the main diversion valve 54 is fixedly connected and connected to the upper water circuit assembly 11, and the second outlet end is fixedly connected and connected to the lower water circuit assembly 21.

[0053] The water supply device 5 temporarily stores water through the water tank 51, the booster pump 52 provides pressure, the water filter 53 filters impurities in the water, and the main diversion valve 54 diverts water to the upper water circuit component 11 and the lower water circuit component 21, ensuring normal water supply to the upper dust suppression unit 1 and the lower dust suppression unit 2, improving the working efficiency and stability of the dust suppression equipment, and better meeting the water needs of the equipment compared to a simple water supply method.

[0054] Reference Figure 3 The dust suppression equipment applied to the pit of the double-vehicle tipper also includes an installation device 7. The installation device 7 includes a first installation component 71, a second installation component 72 and a third installation component 73. The first spray box 12 is connected to the side wall of the pit through the first installation component 71, the second spray box 22 is connected to the side wall of the pit through the third installation component 73, and the upper water channel component 11 or the lower water channel component 21 is connected to the side wall of the pit through the second installation component 72.

[0055] Reference Figure 5Each first spray box 12 has a set of first mounting components 71 at both ends. Each first mounting component 71 includes a mounting frame 711, a first fixing plate 712, and a second fixing plate 713. The mounting frame 711 is C-shaped, with one end fixedly connected to the side wall of the pit and the other end welded to the first fixing plate 712. The second fixing plate 713 is hinged to the first fixing plate 712 by mounting bolts. The mounting bolts are threaded with mounting nuts, which abut against the side wall of the second fixing plate 713 away from the first fixing plate 712. The head of the mounting bolt abuts against the side wall of the first fixing plate 712 away from the second fixing plate 713, thus fixing the first fixing plate 712 and the second fixing plate 713. The first spray box 12 is fixedly connected to the second fixing plate 713.

[0056] Reference Figure 3 , Figure 4 and Figure 5 Multiple sets of the second mounting components 72 are provided and installed at intervals along the respective pipeline routes of the first branch pipe 113, the second branch pipe 114, the third branch pipe 213, the fourth branch pipe 214, the main intake pipe 31, and the air passage branch pipe 66. Each set of the second mounting components 72 includes a bracket 721, a pipe clamp 722, and a fixing bolt 723; the bracket 721 is fixedly connected to the side wall of the pit. The pipe clamp 722 is C-shaped with its opening facing downwards. The pipe clamp 722 covers the corresponding pipeline, and each end of the pipe clamp 722 extends with an ear plate at a distance from each other. The ear plate abuts against the top of the bracket 721. Multiple fixing bolts 723 are provided, respectively located on both sides of the pipe clamp 722 and passing through the corresponding ear plate. After passing through the ear plate and the bracket 721, the fixing bolt 723 is threaded with a nut to fix the pipe clamp 722 to the bracket 721, thereby completing the fixation of the pipeline.

[0057] Reference Figure 3 and Figure 6 The third installation component 73 includes an installation box 731 and movable groups. In this embodiment, every three second spray boxes 22 form a group, and each second spray box 22 has a movable group at each end. The installation box 731 is fixedly connected to the side wall of the foundation pit, and one installation box 731 is provided for each group of second spray boxes 22. In other embodiments, the number of second spray boxes 22 in a group can be set according to the actual situation.

[0058] Reference Figure 6 The active assembly includes a first mounting plate 732 and a second mounting plate 733. The first mounting plate 732 is fixedly connected to the mounting box 731, and the second mounting plate 733 is hinged to the first mounting plate 732 via a shaft. The second spray box 22 is fixedly connected to its corresponding second mounting plate 733. The mounting box 731 is connected to a control device 8, which is connected to the second mounting plate 733 and used to adjust the angle of the second mounting plate 733.

[0059] Reference Figure 7 , Figure 8 and Figure 9 The control device 8 includes a motor 81, a synchronization component 82 and a control component 83. Each second mounting plate 733 is provided with a set of control components 83, and each pair of adjacent control components 83 is provided with a set of synchronization components 82.

[0060] Reference Figure 7 , Figure 8 and Figure 9 The motor 81 is housed within the mounting box 731 and is fixedly connected to the mounting box 731. The motor 81 is electrically connected to a PLC control module for controlling its opening and closing. The control assembly 83 includes a screw 831, a movable sleeve 832, and a pull rod 833. The screw 831 is housed within the mounting box 731. Any corresponding screw 831 within a set of second spray boxes 22 is fixedly connected to the drive shaft of the motor 81, and the screw 831 is rotatably connected to the mounting box 731. A synchronization assembly 82 is provided between every two adjacent screws 831. The synchronization assembly 82 includes sprockets 821 and a chain 822. Two sprockets 821 are provided, each fixedly connected to one of the corresponding two screws 831. The chain 822 is sleeved on the two sprockets 821 and meshes with both sprockets 821.

[0061] Reference Figure 7 , Figure 8 and Figure 9 The movable square sleeve 832 is fitted onto the screw 831 and threadedly connected to the screw 831. One end of the movable square sleeve 832 slides out of the mounting box 731 and is hinged to the pull rod 833. The pull rod 833 is hinged to the second mounting plate 733.

[0062] In use, the motor 81 drives the screw 831 to rotate, and the screw 831 drives the movable square sleeve 832 to move on the mounting box 731, thereby driving the pull rod 833 to drive the second mounting plate 733 to rotate, so as to realize the angle adjustment.

[0063] The arrangement of the first mounting component 71, the second mounting component 72, and the third mounting component 73 makes the installation of the first spray box 12, the upper water channel component 11, the lower water channel component 21, and the second spray box 22 more stable. The angle of the first spray box 12 can be manually adjusted, and the angle of the second spray box 22 can be adjusted through the control device 8, thereby adjusting the spray direction and range of the water mist and further improving the dust suppression effect. Compared with the traditional fixed installation method, it increases the flexibility and adaptability of the equipment.

[0064] Reference Figure 7 , Figure 8 and Figure 9The control device 8 also includes multiple sets of dustproof components 84, with each movable sleeve 832 corresponding to one set of dustproof components 84. Each dustproof component 84 includes a dustproof box 841 and a dustproof sleeve 842. The dustproof box 841 is fixedly connected to the mounting box 731 and is fitted onto the outside of the portion of the movable sleeve 832 that protrudes from the mounting box 731. The dustproof box 841 has a through hole for the pull rod 833 to move. The dustproof sleeve 842 is fitted onto the outer periphery of the pull rod 833, with its first end connected to the dustproof box 841 and sealing the through hole. The second end of the dustproof sleeve 842 has a constricted structure and is sealed and fixedly connected to the side wall of the pull rod 833 to form a closed dustproof space. The dustproof sleeve 842 can be made of rubber, wear-resistant flexible fabric, etc. If rubber is used, its elastic deformation capability can ensure a seal without hindering the movement of the pull rod 833; if flexible fabric is used, the stacked structure can provide sufficient leeway for the movement of the pull rod 833. Both materials are smooth and will not cause friction interference to the pull rod 833 and the movable square sleeve 832, nor will they affect the dust suppression effect.

[0065] The dustproof component 84 effectively prevents dust from entering the control device 8, avoiding dust from causing wear to components such as the screw 831 and the moving sleeve 832, extending the service life of the control device 8, and improving the reliability and stability of the equipment. Compared with the control device 8 without dustproof measures, it reduces maintenance costs and failure rate.

[0066] Reference Figure 7 , Figure 8 and Figure 9 Multiple air-blowing devices 9 are provided, each corresponding to a control component 83. Each air-blowing device 9 includes an air bladder 91, an air nozzle 92, and an air-squeezing assembly 93. The air bladder 91 is located below the screw 831 and fixedly connected to the inner bottom wall of the mounting box 731. The air inlet of the air nozzle 92 communicates with the interior of the air bladder 91, and the outlet passes through the mounting box 731 and faces the hinge between the first mounting plate 732 and the second mounting plate 733, for blowing air onto the hinge. The air-squeezing assembly 93 is connected to the movable square sleeve 832 and can selectively squeeze the air bladder 91.

[0067] Reference Figure 7 , Figure 8 and Figure 9The extrusion assembly 93 includes a protrusion 931, a cam 932, a vertical plate 933, a first positioning slider 934, a second positioning slider 935, and an extrusion plate 936. The protrusion 931 is fixedly connected to the movable square sleeve 832. The cam 932 is sleeved on the outer periphery of the movable square sleeve 832 and the screw 831. The inner wall of the cam 932 has a spiral drive groove 9321. The protrusion 931 is located in the drive groove 9321 and slides in cooperation with the cam 932. The vertical plate 933 is fixedly connected to the mounting box 731. An installation space is formed between the vertical plate 933 and the inner wall of the mounting box 731 near the second spray box 22. The cam 932 is located in the installation space. The screw 831 passes through the corresponding vertical plate 933 and is rotatably connected to the vertical plate 933.

[0068] Reference Figure 7 , Figure 8 and Figure 9 The first positioning slider 934 and the second positioning slider 935 are respectively connected to the two ends of the cam 932 along the axis. The inner wall of the mounting box 731 is provided with a first positioning groove 7311. The first positioning slider 934 slides in cooperation with the first positioning groove 7311. The vertical plate 933 is provided with a second positioning groove 9331. The second positioning slider 935 slides in cooperation with the second positioning groove 9331.

[0069] Reference Figure 7 , Figure 8 and Figure 9 A pressing plate 936 is disposed between a cam 932 and an air bladder 91, both of which abut against the pressing plate 936. The pressing plate 936 is connected to a telescopic structure 9361, which includes a fixed cylinder, a moving rod, and a spring. The fixed cylinder is fixedly connected to the mounting box 731, the moving rod is disposed inside the fixed cylinder and slides within it, and the pressing plate 936 is fixedly connected to the moving rod. The spring is disposed inside the fixed cylinder, with one end fixedly connected to the moving rod and the other end fixedly connected to the fixed cylinder, for automatically resetting the pressing plate 936. In other embodiments, the pressing plate 936 is fixedly connected to the air bladder 91 and / or the pressure plate is slidably connected to the outer peripheral wall of the cam 932.

[0070] In use, the movable sleeve 832 moves, and the protrusion 931 slides in the drive groove 9321, driving the cam 932 to rotate. The cam 932 pushes the extrusion plate down, thereby causing the extrusion assembly 93 to extrude the air bag 91. The gas in the air bag 91 is blown to the hinge through the air nozzle 92 to clean the dust at the hinge and ensure the flexible rotation of the hinge.

[0071] In other embodiments, the interval between the intermittent pulsed airflows emitted by the blowing device 9 is adjustable. When the second spray box 22 has not been angled for an extended period, to prevent dust from accumulating at the hinge between the first mounting plate 732 and the second mounting plate 733, the motor 81 can be activated at a preset fixed time, when dust suppression is not currently required, to adjust the angle of the second spray box 22, thereby triggering the blowing device 9 to spray air onto the hinge for cleaning. This setting effectively removes dust accumulated at the hinge, ensures rotational flexibility, further improves the operational stability and reliability of the equipment, and extends its service life.

[0072] In this embodiment, all pipelines can be equipped with valves and flow meters according to actual conditions. Valves can be solenoid valves, ball valves, etc.; flow meters can be electromagnetic flow meters to measure water flow, and differential pressure flow meters or thermal mass flow meters to measure gas flow.

[0073] In this embodiment, the main diversion valve 54, the first diversion valve 112, and the second diversion valve 212 can all be high-pressure three-way diversion valves, suitable for high-pressure conditions of 3-10MPa. All water pipes in this embodiment (including but not limited to the upper water pipe assembly 11 and the lower water pipe assembly 21) are made of high-pressure seamless stainless steel pipes to prevent high-pressure water impact leakage. At the same time, the upper main pipe 111 and the lower main pipe 211 are respectively equipped with independent flow regulating valves and pressure monitoring gauges, which can adjust the water supply pressure and flow rate of the two branch pipes according to the dust suppression requirements of the upper fog curtain and the gas-liquid mixing atomization requirements of the lower layer. Among them, the first nozzle 13 (fan-shaped nozzle) needs to maintain a water supply pressure of 3-8MPa to ensure the fog curtain coverage area; the second nozzle 23 (gas-liquid two-phase flow swirl nozzle) needs to maintain a water supply pressure of 2-6MPa to adapt to the gas-liquid mixing atomization effect and avoid excessively high or low pressure affecting the dust suppression effect. The air supply pressure of the air supply device 6 is maintained at 0.3 to 0.8 MPa, which matches the water supply pressure of the second nozzle 23, ensuring that the droplet size is between 10 and 50 μm.

[0074] The vertical distance between the second spray box 22 and the main suction pipe 31 is 2.0–2.5 m. The droplet spray velocity of the second nozzle 23 is 8–12 m / s, and the suction velocity of the main suction pipe 31 is 3–5 m / s. This effectively prevents the spray from being sucked away by the middle-layer suction unit before fully covering the dust, ensuring sufficient contact time and space between the droplets and the dust, and improving the dust collection effect. The gas-liquid two-phase flow swirl nozzle has a gas-liquid mixing chamber inside. The liquid inlet is connected to the external water supply system, and the gas inlet is connected to the middle-layer suction unit.

[0075] The intake branch pipe 32 adopts a downward-sloping, bent structure, allowing large-diameter dust particles to settle due to collision and agglomeration. Combined with the hydrophobic filter device 4 at the inlet, only dust particles smaller than 5μm are allowed to enter the air path. The dust-laden humid air is mixed at high speed with clean compressed air within the Venturi tube 63, diluting the dust concentration to less than 1 / 10 (for example, if the original dust concentration is 50mg / m³, the mixed dust concentration is less than 5mg / m³). Furthermore, the flow velocity of the mixed airflow in the Venturi tube expansion section and downstream pipeline can reach 1... The velocity of the airflow is 5~25 m / s, far exceeding the dust settling velocity (usually <0.5 m / s), providing continuous purging to the downstream pipeline and preventing wet dust deposition. The mixed gas undergoes secondary fine filtration (pore size ≤5 μm) through the air filter 64, effectively intercepting residual submicron-sized wet dust in the mixed gas, ensuring that the gas output from the outlet of the air filter 64 is nearly clean. The second nozzle 23 is a gas-liquid two-phase flow swirl nozzle with a gas channel diameter ≥2 mm and a gas velocity ≥30 m / s under operating conditions, which does not provide conditions for dust adhesion. The air filter 64 is a replaceable consumable part. Under typical dust conditions of a dual-vehicle tipper, the maintenance cycle can reach 3 to 6 months, which is comparable to the replacement frequency of the water filter in the water supply circuit, without adding extra maintenance burden.

[0076] The implementation principle of this embodiment is as follows: the upper dust suppression unit 1 forms a water mist layer above the foundation pit, effectively blocking the outward spread of dust; the lower dust suppression unit 2's upward-spraying water mist coverage area can better adsorb dust in the foundation pit; the middle air intake unit 3 draws in low-concentration dust-laden humid air pre-wetted by water mist and introduces the filtered air into the air inlet, achieving effective dust control and resource recycling. The installation device 7 makes the installation of the first spray box 12, the second spray box 22, and the water circuit assembly more stable, and can adjust the angle of the first spray box 12 and the second spray box 22, thereby adjusting the spray direction and range of the water mist and further improving the dust suppression effect. The dustproof component 84 can effectively prevent dust from entering the control device 8, avoiding dust from causing wear to components such as the screw 831 and the moving square sleeve 832, and extending the service life of the control device 8. The blowing device 9 can clean the dust at the hinge between the first mounting plate 732 and the second mounting plate 733, preventing dust from affecting the rotation flexibility of the hinge. The water supply device 5 stores water in a water tank 51, provides pressure through a booster pump 52, filters impurities in the water through a water filter 53, and diverts water to the upper water circuit assembly 11 and the lower water circuit assembly 21 through a main diversion valve 54, ensuring normal water supply to the upper dust suppression unit 1 and the lower dust suppression unit 2. Compared with traditional dust suppression methods, this embodiment greatly improves dust suppression efficiency, solves the defects of existing dust suppression methods, increases the flexibility and adaptability of the equipment, improves the reliability and stability of the equipment, reduces maintenance costs and failure rate, and can better meet the water demand of the equipment.

[0077] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A dust suppression device applied in the pit of a double-vehicle tipper, characterized in that, include: The upper dust suppression unit (1) is used to suppress the outward spread of dust in the foundation pit. The upper dust suppression unit (1) includes an upper water channel assembly (11), a first spray box (12) and a first nozzle (13). The upper water channel assembly (11) is arranged in the circumferential area of ​​the foundation pit and is connected to a water supply device (5). Multiple first spray boxes (12) are provided and arranged at intervals along the pipeline direction of the upper water channel assembly (11). Multiple first nozzles (13) are fixedly installed on each first spray box (12) for spraying water mist into the foundation pit to form a dust suppression covering layer. The lower dust suppression unit (2) includes a lower water channel assembly (21), a second spray box (22), and a second nozzle (23). The lower water channel assembly (21) is arranged in the circumferential area of ​​the foundation pit and is located below the upper water channel assembly (11). The lower water channel assembly (21) is connected to the water supply device (5). Multiple second spray boxes (22) are provided and arranged at intervals along the pipeline direction of the lower water channel assembly (21). Each second spray box (22) is connected to multiple second nozzles (23) for spraying water mist into the foundation pit. The head (23) is provided with a gas-liquid mixing chamber, a water inlet and a gas inlet. The water inlet is connected to the lower water circuit assembly (21) through the second spray box (22). The gas inlet is connected to a gas supply device (6). A middle-layer air intake unit (3) is also provided for drawing low-concentration dust-laden humid air pre-wetted by water mist from the middle of the pit. The middle-layer air intake unit (3) includes a main intake pipe (31), intake branch pipes (32) and a conveying pipe assembly (33). The main intake pipe (31) is located between the upper dust suppression unit (1) and the lower dust suppression unit (2). 31) Connected to the sidewall of the foundation pit, the main suction pipe (31) is continuously distributed around the foundation pit, and multiple suction branch pipes (32) are provided and spaced around the foundation pit, all of which are connected to the main suction pipe (31). The suction branch pipes (32) are connected to a filter device (4) for pre-filtering the dusty and humid air being drawn in. One end of the delivery pipe assembly (33) is connected to the main suction pipe (31), and the other end is connected to the air supply device (6). The air supply device (6) includes an air compressor (61), an air storage tank (62), a venturi tube (63), and An air filter (64) is provided. The inlet of the air compressor (61) is connected to the atmosphere, and the outlet is connected to the inlet of the air tank (62). The outlet of the air tank (62) is connected to the first inlet of the venturi tube (63). The second inlet of the venturi tube (63) is connected to the end of the delivery pipe assembly (33) away from the intake main pipe (31), and the outlet is connected to the inlet of the air filter (64). The outlet of the air filter (64) is connected to the air inlet. It is used to introduce filtered dust-laden humid air into the air inlet.It also includes an installation device (7) and an air blowing device (9). The second spray box (22) is hinged to the side wall of the pit via the installation device (7) to achieve an adjustable angle. The air blowing nozzle of the air blowing device (9) is aligned with the hinge part of the installation device (7) for indirect air blowing to the hinge part.

2. The dust suppression device applied in the pit of a double-vehicle tipper according to claim 1, characterized in that, The installation device (7) includes a first installation component (71), a second installation component (72), and a third installation component (73). The first spray box (12) is connected to the side wall of the pit through the first installation component (71), the second spray box (22) is connected to the side wall of the pit through the third installation component (73), and the upper water channel component (11), the lower water channel component (21), or the air intake main pipe (31) are all connected to the side wall of the pit through the second installation component (72).

3. The dust suppression device applied in the pit of a double-vehicle tipper according to claim 2, characterized in that, The third mounting assembly (73) includes a mounting box (731) and a movable group. Every three second spray boxes (22) form a group, and each group of second spray boxes (22) is provided with a mounting box (731). The mounting box (731) is fixedly connected to the side wall of the pit. Each second spray box (22) is connected to the movable group. The movable group includes a first mounting plate (732) and a second mounting plate (733). The first mounting plate (732) is fixedly connected to the mounting box (731), and the second mounting plate (733) is hinged to the first mounting plate (732). The second spray box (22) is fixedly connected to its corresponding second mounting plate (733). The mounting box (731) is connected to a control device (8). The control device (8) is connected to the second mounting plate (733) and is used to adjust the angle between the second mounting plate (733) and the first mounting plate (732).

4. A dust suppression device for use in the pit of a double-vehicle tipper according to claim 3, characterized in that, The control device (8) includes a motor (81), a synchronization component (82), and a control component (83). Each of the second mounting plates (733) is connected to a control component (83). The control component (83) includes a screw (831), a moving sleeve (832), and a pull rod (833). The motor (81) and the screw (831) are both located inside the mounting box (731). The motor (81) is connected to the mounting box (731). Any screw (831) in a set of second spray boxes (22) is connected to the drive shaft of the motor (81). A square sleeve (832) is fitted onto the screw (831) and threadedly connected to the screw (831). One end of the movable square sleeve (832) slides out of the mounting box (731) and is hinged to the pull rod (833). The pull rod (833) is connected to the second mounting plate (733) and is used to drive the second mounting plate (733) to rotate under the drive of the movable square sleeve (832). A set of synchronization components (82) is provided for each pair of adjacent screws (831) in a set of second spray boxes (22) to realize the synchronous movement of the screws (831).

5. A dust suppression device for use in the pit of a double-vehicle tipper according to claim 4, characterized in that, The control device (8) further includes a dustproof component (84). Each movable square sleeve (832) is provided with a corresponding dustproof component (84). The dustproof component (84) includes a dustproof box (841) and a dustproof sleeve (842). The dustproof box (841) is connected to the mounting box (731) and is sleeved on the outside of the part of the movable square sleeve (832) that protrudes from the mounting box (731). The dustproof box (841) has a through hole for the movement of the pull rod (833). The dustproof sleeve (842) is sleeved on the pull rod (833). The first end of the dustproof sleeve (842) is connected to the dustproof box (841) and blocks the through hole. The second end of the dustproof sleeve (842) has a constricted structure and is sealed to the side wall of the pull rod (833) to form a closed dustproof space.

6. A dust suppression device for use in the pit of a double-vehicle tipper according to claim 4, characterized in that, The air blowing device (9) includes an air bag (91), an air nozzle (92), and an air squeezing assembly (93). The air bag (91) is located below the screw (831) and connected to the inner bottom wall of the mounting box (731). The air inlet of the air nozzle (92) is connected to the interior of the air bag (91), and the air outlet passes through the mounting box (731) and faces the hinge of the first mounting plate (732) and the second mounting plate (733) to blow air to the hinge. The air squeezing assembly (93) is connected to the movable square sleeve (832) and squeezes the air bag (91).

7. A dust suppression device for use in the pit of a double-vehicle tipper according to claim 6, characterized in that, The extrusion assembly (93) includes a protrusion (931), a cam (932), a vertical plate (933), a first positioning slider (934), a second positioning slider (935), and an extrusion plate (936). The protrusion (931) is fixedly connected to the movable square sleeve (832). The cam (932) is sleeved on the outer periphery of the movable square sleeve (832) and the screw (831). The inner wall of the cam (932) has a spiral drive groove (9321). The protrusion (931) is located in the drive groove (9321) and slides with the cam (932). The vertical plate (933) is connected to the mounting box (731), and a gap is formed between the vertical plate (933) and the inner wall of the mounting box (731). The installation space includes a cam (932) located within it. The extrusion plate (936) is connected to the cam (932). When the cam (932) rotates, the extrusion plate (936) pushes downward and extrudes the airbag (91). A first positioning slider (934) and a second positioning slider (935) are respectively connected to the two ends of the cam (932) along its axial direction. A first positioning groove (7311) is provided on the inner wall of the mounting box (731). The first positioning slider (934) slides in cooperation with the first positioning groove (7311). A second positioning groove (9331) is provided on the vertical plate (933). The second positioning slider (935) slides in cooperation with the second positioning groove (9331).

8. A dust suppression device for use in the pit of a double-vehicle tipper according to claim 1, characterized in that, The water supply device (5) includes a water tank (51), a booster pump (52), a water filter (53), and a main diversion valve (54). The water tank (51) is connected to an inlet pipe and an outlet pipe. The inlet pipe is used to connect to a water source. The inlet end of the booster pump (52) is connected to the outlet pipe of the water tank (51). The inlet end of the water filter (53) is connected to the outlet end of the booster pump (52). The inlet end of the main diversion valve (54) is connected to the outlet end of the water filter (53). The first outlet end of the main diversion valve (54) is connected to the upper water circuit assembly (11), and the second outlet end is connected to the lower water circuit assembly (21).

9. A dust suppression device for use in the pit of a double-vehicle tipper according to claim 1, characterized in that, The second nozzle (23) is set to spray in an upward direction to form an upward water mist coverage area inside the pit; the angle between the second nozzle (23) and the horizontal plane is 5 to 30 degrees.

10. A dust suppression device applied in the pit of a double-vehicle tipper according to claim 1, characterized in that, The intake branch pipe (32) has a bent structure, including an integrally formed fixed section and an intake section that are interconnected; the fixed section is connected to the intake main pipe (31), and the intake section is inclined downward from one end near the fixed section to the other end.

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