An urban construction site dust reduction device

Abstract

The present invention relates to the technical field of separation devices, and particularly to a dust reduction device for urban construction sites, which includes a frame, a spraying mechanism, a filtering mechanism, and a driving mechanism. During the construction process, the driving mechanism enables the filtering mechanism and the spraying mechanism to work alternately. When the filtering mechanism is working, the air at the construction site is sucked into the filtering box. After the dust-containing air passes through the filter plate, the dust is filtered by the filter plate, and the air and dust are separated, completing the filtering and dust reduction work. Thereafter, the driving mechanism stops the filtering mechanism from working and enables the spraying mechanism to work. The filtered air enters from the air inlet of the atomizing nozzle through the air delivery pipe and serves as the air supply source for the atomizing nozzle. Without an external air source, the atomizing nozzle directly mixes and atomizes the filtered air and water and sprays it onto the construction site, completing the spray dust reduction work. The spray dust reduction and the filtering dust reduction work are completed alternately, having higher dust reduction efficiency and better dust reduction effect, and the spraying mechanism and the filtering mechanism are combined to reduce the overall volume of the dust reduction device.

Description

Technical Field

[0001] The present invention relates to the technical field of separation devices, and particularly relates to a dust reduction device for urban construction sites. Background Art

[0002] A dust reduction device for a construction site is a device designed specifically to control and reduce dust pollution generated during construction activities. These devices play an important role in protecting the health of construction workers, maintaining the quality of life of surrounding residents, and protecting the ecological environment. The working principles of dust reduction devices are diverse, including spray dust reduction, filtration dust removal, and electrostatic dust removal, etc. Among them, a spray dust reduction device sprays water mist into the air through a high-pressure nozzle, forms fine water droplets that combine with dust particles, and uses the gravitational force to settle them. In the process of using the existing dust reduction spray devices, it is easy to cause the humidity in the target area to be too high, affecting the storage of construction raw materials and the construction progress.

[0003] For this reason, Chinese patent document with publication number CN119327201A discloses an environmentally friendly intelligent dust reduction spray device, which can recover the atomized particles combined with dust in the air through a recovery component. The advantage is that it can avoid the ground wetness caused by long-term water mist spraying. However, for the spray dust reduction devices in the above patent and the prior art, in order to atomize water, they need to pump in gas for auxiliary atomization, so they need an external air supply source, resulting in problems of large device weight and volume, and the interval time between two adjacent sprays is wasted, and the dust reduction effect and efficiency need to be improved. Summary of the Invention

[0004] According to the deficiencies of the prior art, the present invention proposes a dust reduction device for urban construction sites, which solves the problems that the existing spray dust reduction devices need an external air supply source during use, and have poor dust reduction effect and low dust reduction efficiency.

[0005] A dust reduction device for urban construction sites of the present invention adopts the following technical solutions, including:

[0006] A frame, on which a water storage tank is fixedly connected, and the water storage tank is filled with water;

[0007] A spraying mechanism, including an atomizing nozzle, and the atomizing nozzle is communicated with the water storage tank;

[0008] A filtering mechanism, including a filtering box, a filter plate, and an air pipe. The filtering box is fixedly connected to the frame; the filter plate is arranged in the filtering box, one end of the air pipe is connected to the filtering box, and the other end is communicated with the air inlet of the atomizing nozzle;

[0009] A driving mechanism for alternately operating the filtering mechanism and the spraying mechanism.

[0010] Optionally, a one-way pressure valve is provided at the connection between the gas pipeline and the filter box. A cover plate is fixedly connected to the filter box. An air inlet hole is provided on the cover plate, and a one-way valve is connected to the air inlet hole, allowing air to enter the filter box only from the outside. The spraying mechanism further includes a pump water tank. The pump water tank is cylindrical. Four partition plates are provided in the pump water tank. The partition plates extend radially along the pump water tank, dividing the pump water tank into four chambers connected end to end. The four chambers are set as the first chamber, the second chamber, the third chamber, and the fourth chamber in sequence. Water is filled in the four chambers. The first chamber is connected with a plurality of atomizing nozzles, and the plurality of atomizing nozzles are spaced along the axis direction of the pump water tank. The second chamber is communicated with the water storage tank near the third chamber, and a blocking component is provided at the connection between the second chamber and the water storage tank. The blocking component has an open state and a blocking state. When the blocking component is in the blocking state, the water storage tank is separated from the second chamber. When the blocking component is in the open state, the water storage tank is communicated with the second chamber. The fourth chamber is communicated with the filter box.

[0011] The partition plate between the first chamber and the second chamber is the first partition plate, the partition plate between the second chamber and the third chamber is the second partition plate, the partition plate between the third chamber and the fourth chamber is the third partition plate, and the partition plate between the fourth chamber and the first chamber is the fourth partition plate. A plurality of through holes are provided on the first partition plate, the second partition plate, and the third partition plate. The through holes on the first partition plate are connected with one-way valves, allowing water to flow only from the second chamber to the first chamber.

[0012] The driving mechanism is used to, while the water in the first chamber enters the atomizing nozzles, make the gas in the filter box enter the atomizing nozzles through the gas pipeline. At the same time, the blocking component is switched to the open state, and the water in the water storage tank enters the second chamber. Thereafter, the driving mechanism switches the blocking component to the blocking state. While the water in the second chamber enters the first chamber, the air outside the filter box is sucked into the filter box. And the above process is repeated.

[0013] Optionally, the driving mechanism includes a driving component and four push plates. The four push plates are respectively installed in the four chambers. The push plates extend radially along the pump water tank and can rotate around the axis of the pump water tank. One end of the push plate facing the axis of the pump water tank is connected with the driving component, and the other end of the push plate away from the axis of the pump water tank is in sealed contact with the inner wall of the pump water tank. The driving component is used to drive the four push plates to rotate synchronously and reciprocally. The push plate in the first chamber is set as the first push plate; the push plate in the second chamber is set as the second push plate; the push plate in the third chamber is set as the third push plate; the push plate in the fourth chamber is set as the fourth push plate.

[0014] Optionally, the blocking component includes a blocking plate and a plurality of blocking springs. A sliding groove is provided on the peripheral wall of the second chamber of the pump water tank near the second partition plate. The sliding groove extends along the circumferential direction of the pump water tank. The blocking plate is slidably installed in the sliding groove. The blocking plate is fixedly connected with a switching protrusion extending into the second chamber. The plurality of blocking springs are spaced along the axial direction of the pump water tank. The two ends of the blocking spring are respectively connected with the pump water tank and the blocking plate, and the blocking spring makes the blocking plate tend to block the communication port between the second chamber and the water storage tank.

[0015] Optionally, the driving assembly includes a driving motor and a transmission shaft. The transmission shaft is coaxially installed in the pump water tank. A driving wheel is fixedly connected to the transmission shaft. One end of the push plate facing the transmission shaft is fixedly connected with a driven wheel. The driven wheel meshes with the driving wheel. The output end of the driving motor is connected to the transmission shaft.

[0016] Optionally, a sensor is installed in the filter box. The sensor is used to detect the amount of dust increased in the filter box per unit time. A control system is arranged on the frame. The control system adjusts the reciprocating rotation angle of the transmission shaft according to the detection result of the sensor. The time of each reciprocating rotation is equal. The more the amount of dust increased in the filter box per unit time, the larger the reciprocating rotation angle of the transmission shaft.

[0017] Optionally, a plurality of pump water tanks are provided.

[0018] Optionally, a baffle is arranged in the filter box, and the baffle allows the gas to pass through.

[0019] Optionally, the filter plate is arc-shaped and can undergo elastic deformation; in the initial state, the center of the circle of the filter plate is located above the filter plate.

[0020] Optionally, the water level in the filter box is lower than the lowest point position of the filter plate.

[0021] The beneficial effects of the present invention are as follows: A dust reduction device for urban construction sites of the present invention effectively combines a spraying mechanism and a filtering mechanism, reduces the overall volume of the dust reduction device, alternately completes spray dust reduction and filtering dust reduction through a driving mechanism, optimizes the dust reduction effect, and improves the dust reduction efficiency. At the same time, the gas filtered by the filter plate is directly used as the air supply source of the atomizing nozzle, which ensures the atomizing effect and does not require an additional air source, reducing the weight and floor area of the equipment.

[0022] Furthermore, during the dust reduction process, the arc-shaped filter plate undergoes reciprocating deformation, so that the dust particles attached to the filter plate are separated from the filter plate, and the water in the fourth chamber flushes the filter plate, further separating the dust particles from the filter plate.

[0023] Furthermore, the present invention can adaptively adjust the amount of water mist sprayed by the atomizing nozzle into the air according to the amount of dust increased in the filter box per unit time, which can avoid the construction environment humidity being too high and affecting the storage of construction raw materials and the construction effect while ensuring the dust reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 This is a schematic diagram of the overall structure of a dust reduction device for urban construction sites according to the present invention;

[0026] Figure 2 This is the front view of a dust reduction device for urban construction sites according to the present invention;

[0027] Figure 3 is Figure 2 the cross-sectional view of A-A in

[0028] Figure 4 is Figure 3 the enlarged view at X in

[0029] Figure 5 This is a schematic diagram of the structures of the spraying mechanism and the filtering mechanism in a dust reduction device for urban construction sites according to the present invention.

[0030] In the figure:

[0031] 100, frame; 110, water storage tank;

[0032] 200, spraying mechanism; 210, atomizing nozzle; 220, pump water tank; 221, first partition; 222, second partition; 223, third partition; 224, fourth partition; 225, first chamber; 226, second chamber; 227, third chamber; 228, fourth chamber; 230, plugging assembly; 231, plugging plate; 232, plugging spring; 233, switching projection;

[0033] 300, filtering mechanism; 310, filtering box; 311, cover plate; 312, air inlet; 313, check valve; 314, baffle; 320, filter plate; 330, air delivery pipe; 331, one-way pressure valve;

[0034] 400, driving mechanism; 401, first push plate; 402, second push plate; 403, third push plate; 404, fourth push plate; 405, driving motor; 406, transmission shaft; 407, driving wheel; 408, driven wheel. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Such as Figures 1 to 5As shown in the figure, a dust reduction device for an urban construction site provided by an embodiment of the present invention includes a frame 100, a spraying mechanism 200, a filtering mechanism 300, and a driving mechanism 400;

[0037] The frame 100 is fixedly connected with a water storage tank 110, and the water storage tank 110 is filled with water;

[0038] The spraying mechanism 200 includes an atomizing nozzle 210, and the atomizing nozzle 210 is communicated with the water storage tank 110;

[0039] The filtering mechanism 300 includes a filtering box 310, a filter plate 320, and an air delivery pipe 330. The filtering box 310 is fixedly connected to the frame 100; the filter plate 320 is arranged in the filtering box 310, one end of the air delivery pipe 330 is connected to the filtering box 310, and the other end is communicated with the air inlet of the atomizing nozzle 210;

[0040] The driving mechanism 400 is used to make the filtering mechanism 300 and the spraying mechanism 200 work alternately.

[0041] During the construction process, the dust reduction device is placed at the position where dust reduction is required, and the driving mechanism 400 is started. The driving mechanism 400 makes the filtering mechanism 300 and the spraying mechanism 200 work alternately. During the working process of the filtering mechanism 300, the air at the construction site is sucked into the filtering box 310. After the dust-containing air passes through the filter plate 320, the dust is filtered by the filter plate 320, and the air is separated from the dust therein, completing the filtering dust reduction work. Thereafter, the driving mechanism 400 stops the filtering mechanism 300 from working and makes the spraying mechanism 200 work. The filtered air enters from the air inlet of the atomizing nozzle 210 through the air delivery pipe 330. The atomizing nozzle 210 directly mixes and atomizes the filtered air and water, and sprays it onto the construction site, completing the spray dust reduction work. The present invention combines the spraying mechanism 200 and the filtering mechanism 300, reduces the overall volume of the dust reduction device, and alternately completes the spray dust reduction and filtering dust reduction work, having higher dust reduction efficiency and better dust reduction effect. At the same time, the filtered gas is directly supplied to the atomizing nozzle 210 without an additional air source.

[0042] In a further embodiment, a one-way pressure valve 331 is provided at the connection between the gas pipeline 330 and the filtration tank 310. A cover plate 311 is fixedly connected to the filtration tank 310. An air inlet hole 312 is formed in the cover plate 311, and a one-way valve 313 is connected to the air inlet hole 312, and the one-way valve 313 allows air to enter the filtration tank 310 only from the outside; the spraying mechanism 200 further includes a pump water tank 220; the pump water tank 220 is cylindrical, and four partition plates are provided in the pump water tank 220. The partition plates extend radially along the pump water tank 220 and divide the pump water tank 220 into four chambers connected end to end. It is set that the four chambers are the first chamber 225, the second chamber 226, the third chamber 227, and the fourth chamber 228 in sequence; water is filled in the four chambers; the first chamber 225 is connected with a plurality of atomizing nozzles 210, and the plurality of atomizing nozzles 210 are spaced apart along the axial direction of the pump water tank 220; the second chamber 226 is communicated with the water storage tank 110 at a position close to the third chamber 227, and a blocking assembly 230 is provided at the connection between the second chamber 226 and the water storage tank 110. The blocking assembly 230 has an open state and a blocking state. When the blocking assembly 230 is in the blocking state, the water storage tank 110 is separated from the second chamber 226; when the blocking assembly 230 is in the open state, the water storage tank 110 is communicated with the second chamber 226; the fourth chamber 228 is communicated with the filtration tank 310;

[0043] The partition plate between the first chamber 225 and the second chamber 226 is the first partition plate 221, the partition plate between the second chamber 226 and the third chamber 227 is the second partition plate 222, the partition plate between the third chamber 227 and the fourth chamber 228 is the third partition plate 223, and the partition plate between the fourth chamber 228 and the first chamber 225 is the fourth partition plate 224; a plurality of through holes are formed in the first partition plate 221, the second partition plate 222, and the third partition plate 223; the through holes of the first partition plate 221 are connected with a one-way valve 313, and water can only flow from the second chamber 226 to the first chamber 225;

[0044] The driving mechanism 400 is used to make the gas in the filtration tank 310 enter the atomizing nozzles 210 through the gas pipeline 330 while the water in the first chamber 225 enters the atomizing nozzles 210. The atomizing nozzles 210 mix and atomize the water and the gas and spray it onto the construction site to complete the spray dust reduction work. At the same time, the blocking assembly 230 is switched to the open state, and the water in the water storage tank 110 enters the second chamber 226; thereafter, the driving mechanism 400 switches the blocking assembly 230 to the blocking state. While the water in the second chamber 226 enters the first chamber 225, the air outside the filtration tank 310 is sucked into the filtration tank 310 to separate the air from the dust particles therein and complete the filtration dust reduction work. Thereafter, the above process is repeated.

[0045] In a further embodiment, the driving mechanism 400 includes a driving component and four push plates. The four push plates are respectively installed in four chambers. The push plates extend along the radial direction of the pump water tank 220 and can rotate around the axis of the pump water tank 220. One end of the push plate facing the axis of the pump water tank 220 is connected to the driving component, and the end of the push plate away from the axis of the pump water tank 220 is in sealed contact with the inner wall of the pump water tank 220. The driving component is used to drive the four push plates to rotate synchronously back and forth. The push plate in the first chamber 225 is set as the first push plate 401; the push plate in the second chamber 226 is set as the second push plate 402; the push plate in the third chamber 227 is set as the third push plate 403; the push plate in the fourth chamber 228 is set as the fourth push plate 404.

[0046] In the initial state, the first push plate 401 fits against the fourth partition 224, and the second push plate 402 fits against the first partition 221; the third push plate 403 fits against the second partition 222, and the fourth push plate 404 fits against the third partition 223; when dust suppression is carried out, the push plates are driven to rotate by the driving component; as Figure 3 shown, the four push plates in the left pump water tank 220 rotate counterclockwise synchronously. During the rotation of the push plates, the first push plate 401 moves closer to the first partition 221, thereby pushing the water in the first chamber 225 to flow. However, the water in the first chamber 225 cannot enter the second chamber 226 through the through hole in the first partition 221. The water in the first chamber 225 can only lead to the atomizing nozzle 210; the water in the second chamber 226 flows to the third chamber 227 under the drive of the second push plate 402, the water in the third chamber 227 flows to the fourth chamber 228 under the drive of the third push plate 403, and the water in the fourth chamber 228 flows to the filter box 310; since a one-way valve 313 that only allows air to enter is provided on the air inlet hole 312, after the water in the fourth chamber 228 flows into the filter box 310, the pressure in the filter box 310 increases, and the filtered gas is pressed into the air delivery pipe 330, and then leads to the atomizing nozzle 210. The atomizing nozzle 210 mixes and atomizes water and air and sprays it onto the construction site to complete the work of spray dust suppression. During the above process, the second push plate 402 switches the plugging component 230 from the plugged state to the open state during rotation. Since the water in the second chamber 226 enters the third chamber 227 and the water in the first chamber 225 leads to the atomizing nozzle 210, the second chamber 226 is in a negative pressure state. When the plugging component 230 is in the open state, the water in the water storage tank 110 is sucked into the second chamber 226.

[0047] After that, the driving mechanism 400 drives the four push plates to switch the rotation direction. Refer to Figure 3For the left pump water tank 220 shown, when the four push plates rotate clockwise, the plugging assembly 230 switches to the plugging state. The water in the second chamber 226 enters the first chamber 225, the water in the third chamber 227 enters the second chamber 226, the water in the fourth chamber 228 enters the third chamber 227, and the water in the filter tank 310 enters the fourth chamber 228. At this time, the fourth chamber 228 is in a negative pressure state, sucking the dust-containing gas from the outside into the filter tank 310 through the air inlet hole 312. The dust-containing gas is filtered by the filter plate 320 to complete the filtering and dust reduction work.

[0048] In a further embodiment, the plugging assembly 230 includes a plugging plate 231 and a plurality of plugging springs 232. A sliding groove is provided on the peripheral wall of the second chamber 226 of the pump water tank 220 near the second partition plate 222. The sliding groove extends along the circumferential direction of the pump water tank 220. The plugging plate 231 is slidably installed in the sliding groove, and a switching protrusion 233 extending into the second chamber 226 is fixedly connected to the plugging plate 231. The plurality of plugging springs 232 are spaced along the axial direction of the pump water tank 220. The two ends of the plugging spring 232 are respectively connected to the pump water tank 220 and the plugging plate 231, and the plugging spring 232 makes the plugging plate 231 tend to plug the communication port between the second chamber 226 and the water storage tank 110.

[0049] During the process of the second push plate 402 approaching the second partition plate 222, the water in the second chamber 226 is pushed into the third chamber 227. When the second push plate 402 contacts the switching protrusion 233, the second push plate 402 pushes the switching protrusion 233 to move synchronously, so that the plugging plate 231 moves into the sliding groove, and the plugging spring 232 compresses and stores energy. After that, the second chamber 226 communicates with the water storage tank 110. Since the second chamber 226 is in a negative pressure state, the water in the water storage tank 110 is sucked into the second chamber 226. A water pump can also be provided in the water storage tank 110 to pump the water in the water storage tank 110 into the second chamber 226. When the rotation direction of the second push plate 402 changes, the second push plate 402 no longer exerts a thrust on the switching protrusion 233. The plugging plate 231 extends out of the sliding groove under the action of the plugging spring 232 and blocks the communication port between the second chamber 226 and the water storage tank 110. During this process, the water in the second chamber 226 flows into the first chamber 225, and the water in the third chamber 227 flows into the second chamber 226.

[0050] In a further embodiment, the driving assembly includes a driving motor 405 and a transmission shaft 406. The transmission shaft 406 is coaxially installed on the pump water tank 220. A driving wheel 407 is fixedly connected to the transmission shaft 406. One end of the push plate facing the transmission shaft 406 is fixedly connected to a driven wheel 408. The driven wheel 408 meshes with the driving wheel 407, and the output end of the driving motor 405 is connected to the transmission shaft 406.

[0051] When performing dust reduction, the drive motor 405 is started, and the drive motor 405 drives the transmission shaft 406 to rotate reciprocally. When the transmission shaft 406 rotates, it drives the driving wheel 407 to rotate synchronously, and at the same time drives the four driven wheels 408 to rotate, thereby causing the four push plates to rotate synchronously.

[0052] In a further embodiment, a sensor is installed in the filter box 310. The sensor is used to detect the amount of dust increased in the filter box 310 per unit time. A control system is provided on the frame 100. The control system adjusts the reciprocating rotation angle of the transmission shaft 406 according to the detection result of the sensor. The time of each reciprocating rotation is equal. When the amount of dust increased in the filter box 310 per unit time is more, the reciprocating rotation angle of the transmission shaft 406 is larger.

[0053] When the amount of dust increased in the filter box 310 per unit time is more, it indicates that the dust content in the air is larger. At this time, the control system makes the reciprocating rotation angle of the transmission shaft 406 larger. Driven by the driving wheel 407 and the driven wheels 408, the four push plates rotate reciprocally in the four chambers by a larger angle, and the atomizing nozzles 210 spray more water mist into the air each time, thereby ensuring the dust reduction effect.

[0054] When the amount of dust increased in the filter box 310 per unit time is less, it indicates that the dust content in the air is smaller. At this time, the control system makes the reciprocating rotation angle of the transmission shaft 406 smaller. Driven by the driving wheel 407 and the driven wheels 408, the four push plates rotate reciprocally in the four chambers by a smaller angle, and the atomizing nozzles 210 spray less water mist into the air each time, thereby avoiding excessive humidity in the air when the dust content in the air is small, which affects the storage of construction raw materials and the construction progress.

[0055] In a further embodiment, a plurality of pump water tanks 220 are provided. As Figure 3 、 Figure 4 、 Figure 5 shown, two pump water tanks 220 are provided, and the two pump water tanks 220 are symmetrically arranged. Each pump water tank 220 is connected to a plurality of atomizing nozzles 210. The plurality of pump water tanks 220 can pump the water in the water storage tank 110 to the atomizing nozzles 210 synchronously or alternately, improving the dust reduction efficiency and ensuring the dust reduction effect.

[0056] In a further embodiment, a baffle 314 is provided in the filter box 310, and the baffle 314 allows the gas to pass through. Thereby preventing the dust in the filter box 310 from entering the air delivery pipe 330 and blocking the one-way pressure valve 331.

[0057] In a further embodiment, the filter plate 320 is arc-shaped and can undergo elastic deformation; in the initial state, the center of the circle of the filter plate 320 is located above the filter plate 320. The water level in the filter tank 310 is lower than the lowest point of the filter plate 320. When the fourth push plate 404 pushes the water in the fourth chamber 228 into the filter tank 310, the filter plate 320 changes from a concave state to a convex state. Since the air inlet hole 312 is connected with a one-way valve 313, the gas in the filter tank 310 cannot leave the filter tank 310 through the air inlet hole 312 and can only enter the air delivery pipe 330, which is used to assist the atomizing nozzle 210 to atomize water;

[0058] When the fourth partition plate 224 pushes the water in the fourth chamber 228 into the third chamber 227, the water in the filter tank 310 is sucked into the fourth chamber 228. At the same time, due to the change in pressure, the filter plate 320 changes from a convex state to a concave state, and the external air enters the filter tank 310 through the air inlet hole 312 to filter the filter plate 320, completing the work of filtering and dust reduction.

[0059] At the moment when the filter plate 320 deforms, the dust layer attached to the filter plate 320 tends to maintain its original shape. When the filter plate 320 deforms and the dust layer separates from the filter plate 320, and when the water in the fourth chamber 228 enters the filter tank 310, the water flushes the filter plate 320, further separating the dust particles from the filter plate 320 and avoiding the influence of dust attachment to the filter plate 320 on the filtering effect.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust suppression device for urban construction sites, characterized in that: include: A frame, on which a water tank is fixedly connected, and the water tank is filled with water; The spraying mechanism includes an atomizing nozzle, and the atomizing nozzle is connected to the water storage tank; The filter mechanism comprises a filter box, a filter plate and an air pipe, wherein the filter box is fixedly connected to the frame; the filter plate is arranged in the filter box, one end of the air pipe is connected to the filter box, and the other end is connected to the air inlet of the atomizing nozzle; A one-way pressure valve is provided at the connection between the air supply pipe and the filter box, a cover plate is fixedly connected to the filter box, an air inlet hole is provided on the cover plate, the air inlet hole is connected to the one-way valve, and the spraying mechanism also includes a pump water tank; the pump water tank is cylindrical, and four partitions are provided in the pump water tank, the partitions extend along the radial direction of the pump water tank, and the pump water tank is divided into four chambers connected end to end, and the four chambers are set to be the first chamber, the second chamber, the third chamber and the fourth chamber in sequence; the first chamber is connected to a plurality of atomizing nozzles; the second chamber is connected to the water storage tank at a position close to the third chamber, and a plugging assembly is provided at the connection between the second chamber and the water storage tank, the plugging assembly has an open state and a plugging state, and the fourth chamber is connected to the filter box; the partition between the first chamber and the second chamber is the first partition, the partition between the second chamber and the third chamber is the second partition, the partition between the third chamber and the fourth chamber is the third partition, and the partition between the fourth chamber and the first chamber is the fourth partition; a plurality of through holes are provided on the first partition, the second partition and the third partition; the through hole of the first partition is connected to the one-way valve; The driving mechanism is used to make the filtering mechanism and the spraying mechanism work alternately. The driving mechanism includes a driving assembly and four push plates. The four push plates are respectively installed in four chambers. The push plates extend radially along the pump water box and can rotate around the axis of the pump water box.

2. A dust suppression device for urban construction sites according to claim 1, characterized in that: The one-way valve allows air to enter the filter box only from the outside; the four chambers are filled with water; a plurality of atomizing nozzles are spaced apart along the axis of the pump water tank; when the plugging assembly is in a plugging state, the water storage tank is separated from the second chamber; when the plugging assembly is in an open state, the water storage tank is connected to the second chamber, so that water can only flow from the second chamber to the first chamber; The driving mechanism is used to allow the gas in the filter box to enter the atomizing nozzle through the air pipe while the water in the first chamber enters the atomizing nozzle. At the same time, the blocking component is switched to the open state, and the water in the water storage tank enters the second chamber; thereafter, the driving mechanism switches the blocking component to the blocking state, and the water in the second chamber enters the first chamber while the air outside the filter box is sucked into the filter box; and the above process is repeated.

3. A dust suppression device for urban construction sites according to claim 2, characterized in that: One end of the push plate facing the axis of the pump water tank is connected to the driving assembly, and the end of the push plate away from the axis of the pump water tank is sealed and abutted against the inner wall of the pump water tank; the driving assembly is used to drive the four push plates to reciprocate synchronously; the push plate in the first cavity is set as the first push plate; the push plate in the second cavity is set as the second push plate; the push plate in the third cavity is set as the third push plate; the push plate in the fourth cavity is set as the fourth push plate.

4. A dust suppression device for urban construction sites according to claim 3, characterized in that: The sealing assembly includes a sealing plate and multiple sealing springs. A slide groove is provided on the peripheral wall of the second chamber of the pump water tank near the second partition plate. The slide groove extends along the circumference of the pump water tank. The sealing plate is slidably installed in the slide groove. The sealing plate is fixedly connected with a switching protrusion extending to the second chamber. Multiple sealing springs are distributed at intervals along the axial direction of the pump water tank. The two ends of the sealing spring are respectively connected to the pump water tank and the sealing plate. The sealing spring makes the sealing plate have a tendency to block the connecting port between the second chamber and the water tank.

5. A dust suppression device for urban construction sites according to claim 4, characterized in that: The drive assembly includes a drive motor and a transmission shaft. The transmission shaft is coaxially installed on the pump water tank. The transmission shaft is fixedly connected to a driving wheel. A push plate is fixedly connected to one end of the transmission shaft toward a driven wheel. The driven wheel is meshed with the driving wheel. The output end of the drive motor is connected to the transmission shaft.

6. A dust suppression device for urban construction sites according to claim 5, characterized in that: A sensor is installed in the filter box. The sensor is used to detect the amount of dust increased in the filter box per unit time. A control system is set on the frame. The control system adjusts the reciprocating rotation angle of the transmission shaft according to the detection results of the sensor. The time of a single reciprocating rotation is equal. The more dust increases in the filter box per unit time, the greater the reciprocating rotation angle of the transmission shaft.

7. The dust suppression device for urban construction sites according to claim 2, characterized in that: A plurality of pump water tanks are provided.

8. The dust suppression device for urban construction sites according to claim 2, characterized in that: A baffle is arranged in the filter box, and the baffle allows gas to pass through.

9. The dust suppression device for urban construction sites according to claim 2, characterized in that: The filter plate is arc-shaped and can undergo elastic deformation; in the initial state, the center of the filter plate is located above the filter plate.

10. The dust suppression device for urban construction sites according to claim 9, characterized in that: The water level in the filter box is lower than the lowest point of the filter plate.

Images