Dust fall device for urban construction site

Abstract

The invention relates to the technical field of separation devices, in particular to an urban construction site dust falling device which comprises a rack, a spraying mechanism, a filtering mechanism and a driving mechanism. In the construction process, the driving mechanism enables the filtering mechanism and the spraying mechanism to work alternately. When the filtering mechanism works, air of a construction site is sucked into the filtering box, dust-containing air passes through the filtering plate, dust is filtered by the filtering plate, the air and the dust are separated, and filtering and dust falling work is completed. And then the driving mechanism enables the filtering mechanism to stop working and enables the spraying mechanism to work, the filtered air enters from an air inlet of the atomizing nozzle through an air conveying pipe and serves as an air supply source of the atomizing nozzle, an external air source is not needed, the atomizing nozzle directly mixes and atomizes the filtered air and water and sprays the atomized air to a construction site, and spraying and dust falling work is completed. Spraying dust falling and filtering dust falling are alternately completed, higher dust falling efficiency and a better dust falling effect are achieved, the spraying mechanism and the filtering mechanism are combined, and the overall size of the dust falling device is reduced.

Description

Technical Field

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

[0002] Dust suppression devices at construction sites are equipment 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 suppression devices are diverse, including spray dust suppression, filtration dust removal, and electrostatic dust removal. Among them, the spray dust suppression device sprays water mist into the air through a high-pressure nozzle to form fine water droplets that combine with dust particles and use gravity to settle them. During use, the dust suppression spray device of the prior art is prone to cause excessive humidity in the target area, affecting the storage of construction materials and the progress of construction.

[0003] To this end, the Chinese patent document with publication number CN119327201A discloses an environmentally friendly intelligent dust suppression spray device, which can recycle the atomized particles combined with dust in the air through a recovery component, and its advantage is that it can avoid the ground from being wetted by long-term water mist spraying. However, in order to atomize water, the spray dust suppression device in the above patent and the prior art needs to pump in gas to assist atomization, so an external air supply source is required, which has the problem of large weight and volume of the device, and the interval time between two adjacent sprays is wasted, and the dust suppression effect and efficiency need to be improved. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention proposes a dust reduction device for urban construction sites, which solves the problem that the spray dust reduction device in the prior art needs to be connected to an external air supply source when in use, and the problem that the dust reduction effect is poor and the dust reduction efficiency is low.

[0005] The dust suppression device for urban construction sites of the present invention adopts the following technical scheme, including: 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; The driving mechanism is used to make the filtering mechanism and the spraying mechanism work alternately.

[0006] Optionally, 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 is provided on the cover plate, the air inlet is connected to a one-way valve, and the one-way valve allows air to enter the filter box only from the outside; 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 four chambers are filled with water; the first chamber is connected to a plurality of atomizing nozzles, and the plurality of atomizing nozzles are spaced apart along the axial direction of the pump water tank; the second chamber is connected to the water storage tank at a position close to the third chamber, and a plugging component is provided at the connection between the second chamber and the water storage tank, the plugging component has an open state and a blocked state, and when the plugging component is in the blocked state, the water storage tank is separated from the second chamber; when the plugging component is in the open state, the water storage tank is connected to the second chamber; the fourth chamber is connected to the filter box; The partition between the first cavity and the second cavity is the first partition, the partition between the second cavity and the third cavity is the second partition, the partition between the third cavity and the fourth cavity is the third partition, and the partition between the fourth cavity and the first cavity is the fourth partition; a plurality of through holes are provided on the first partition, the second partition and the third partition; a one-way valve is connected to the through hole of the first partition so that water can only flow from the second cavity to the first cavity; 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.

[0007] Optionally, the driving mechanism includes a driving assembly and four push plates, which are respectively installed in 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 to the driving assembly, and one 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 rotate reciprocatingly synchronously; 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; and the push plate in the fourth chamber is set as the fourth push plate.

[0008] Optionally, the sealing assembly includes a sealing plate and a plurality of 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, and the sealing plate is fixedly connected with a switching protrusion extending toward the second chamber; the plurality of 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, and the sealing spring makes the sealing plate tend to block the connecting port between the second chamber and the water tank.

[0009] Optionally, 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, the 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, and the output end of the drive motor is connected to the transmission shaft.

[0010] Optionally, a sensor is installed in the filter box, and 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, and the control system adjusts the reciprocating rotation angle of the transmission shaft according to the detection result of the sensor. The time of a single reciprocating rotation is equal. The more the amount of dust increased in the filter box per unit time, the greater the reciprocating rotation angle of the transmission shaft.

[0011] Optionally, a plurality of pump water tanks are provided.

[0012] Optionally, a baffle is provided in the filter box, and the baffle allows gas to pass through.

[0013] Optionally, the filter plate is arc-shaped and can undergo elastic deformation; in an initial state, the center of the filter plate is located above the filter plate.

[0014] Optionally, the water level in the filter box is lower than the lowest point of the filter plate.

[0015] The beneficial effects of the present invention are as follows: the dust reduction device for urban construction sites of the present invention effectively combines the spraying mechanism and the filtering mechanism, reduces the overall volume of the dust reduction device, and alternately completes the spray dust reduction and the filtering dust reduction through the 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 atomization effect without the need for an external air source, thereby reducing the weight and floor space of the equipment.

[0016] Furthermore, during the dust reduction process, the arc-shaped filter plate deforms reciprocatingly, thereby separating the dust particles attached to the filter plate from the filter plate, and the water in the fourth chamber backwashes the filter plate, further separating the dust particles from the filter plate.

[0017] Furthermore, the present invention can adaptively adjust the amount of water mist sprayed into the air by the atomizing nozzle according to the amount of dust increased in the filter box per unit time, thereby ensuring the dust reduction effect while avoiding excessive humidity in the construction environment that affects the storage of construction materials and affects the construction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] 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; Figure 2 This is a front view of a dust reduction device for urban construction sites according to the present invention; Figure 3 for Figure 2 Middle AA section cutaway view; Figure 4 for Figure 3 Enlarged image at the center X; Figure 5 The present invention is a schematic structural diagram of a spraying mechanism and a filtering mechanism in a dust reduction device for a city construction site.

[0020] In the figure: 100, rack; 110, water tank; 200, spray mechanism; 210, atomizing nozzle; 220, pump water tank; 221, first baffle; 222, second baffle; 223, third baffle; 224, fourth baffle; 225, first cavity; 226, second cavity; 227, third cavity; 228, fourth cavity; 230, blocking assembly; 231, blocking plate; 232, blocking spring; 233, switching protrusion; 300, filter mechanism; 310, filter box; 311, cover plate; 312, air inlet; 313, one-way valve; 314, baffle; 320, filter plate; 330, gas pipeline; 331, one-way pressure valve; 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 DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 5 As shown, a dust reduction device for urban construction sites 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; The frame 100 is fixedly connected to a water tank 110, and the water tank 110 is filled with water; The spray mechanism 200 includes an atomizing nozzle 210 , and the atomizing nozzle 210 is connected to the water storage tank 110 ; The filter mechanism 300 includes a filter box 310, a filter plate 320 and an air supply pipe 330. The filter box 310 is fixedly connected to the frame 100. The filter plate 320 is arranged in the filter box 310. One end of the air supply pipe 330 is connected to the filter box 310, and the other end is connected to the air inlet of the atomizing nozzle 210. The driving mechanism 400 is used to make the filtering mechanism 300 and the spraying mechanism 200 work alternately.

[0023] During the construction process, the dust suppression device is placed at the position where dust suppression is required, and the driving mechanism 400 is started. The driving mechanism 400 enables the filter mechanism 300 and the spray mechanism 200 to work alternately. During the operation of the filter mechanism 300, the air of the construction site is sucked into the filter 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 and dust suppression work. Thereafter, the driving mechanism 400 stops the filter mechanism 300 and enables the spray mechanism 200 to work. The filtered air enters the air inlet of the atomizing nozzle 210 through the air pipe 330. The atomizing nozzle 210 directly atomizes the filtered air and water and sprays them to the construction site to complete the spray dust suppression work. The present invention combines the spray mechanism 200 and the filter mechanism 300, reduces the overall volume of the dust suppression device, and the spray dust suppression and the filtering dust suppression work are completed alternately, with higher dust suppression efficiency and better dust suppression effect. At the same time, the filtered gas is directly supplied to the atomizing nozzle 210 without the need for an external gas source.

[0024] In a further embodiment, a one-way pressure valve 331 is provided at the connection between the air delivery pipe 330 and the filter box 310, a cover plate 311 is fixedly connected to the filter box 310, an air inlet 312 is provided on the cover plate 311, and a one-way valve 313 is connected to the air inlet 312, and the one-way valve 313 allows air to enter the filter box 310 only from the outside; the spraying mechanism 200 also includes a pump water box 220; the pump water box 220 is cylindrical, and four partitions are provided in the pump water box 220, and the partitions extend along the radial direction of the pump water box 220 to divide the pump water box 220 into four chambers connected end to end, and the four chambers are set to be the first chamber 225, the second chamber 226, and the third chamber 227 in sequence. and the fourth chamber 228; the four chambers are filled with water; the first chamber 225 is connected to 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 connected to the water storage tank 110 at a position close to the third chamber 227, and a plugging component 230 is provided at the connection between the second chamber 226 and the water storage tank 110, and the plugging component 230 has an open state and a blocked state. When the plugging component 230 is in the blocked state, the water storage tank 110 is separated from the second chamber 226; when the plugging component 230 is in the open state, the water storage tank 110 is connected to the second chamber 226; the fourth chamber 228 is connected to the filter box 310; The partition between the first chamber 225 and the second chamber 226 is the first partition 221, the partition between the second chamber 226 and the third chamber 227 is the second partition 222, the partition between the third chamber 227 and the fourth chamber 228 is the third partition 223, and the partition between the fourth chamber 228 and the first chamber 225 is the fourth partition 224; the first partition 221, the second partition 222 and the third partition 223 are all provided with a plurality of through holes; the through hole of the first partition 221 is connected to a one-way valve 313, so that water can only flow from the second chamber 226 to the first chamber 225; The driving mechanism 400 is used to make the gas in the filter box 310 enter the atomizing nozzle 210 through the gas pipe 330 while the water in the first chamber 225 enters the atomizing nozzle 210. The atomizing nozzle 210 atomizes the water and gas mixture and sprays it to the construction site to complete the spray dust reduction work. At the same time, the blocking component 230 is switched to the open state, and the water in the water tank 110 enters the second chamber 226; thereafter, the driving mechanism 400 switches the blocking component 230 to the blocking state, and the water in the second chamber 226 enters the first chamber 225, while the air outside the filter box 310 is sucked into the filter box 310, so that the air is separated from the dust particles therein, and the filtering dust reduction work is completed. Thereafter, the above process is repeated.

[0025] In a further embodiment, the driving mechanism 400 includes a driving assembly and four push plates, which are respectively installed in four chambers. The push plates extend radially along 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 assembly, and one end of the push plate away from the axis of the pump water tank 220 is sealed and abutted against the inner wall of the pump water tank 220; the driving assembly is used to drive the four push plates to reciprocate synchronously; 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.

[0026] In the initial state, the first push plate 401 is in contact with the fourth partition plate 224, the second push plate 402 is in contact with the first partition plate 221; the third push plate 403 is in contact with the second partition plate 222, and the fourth push plate 404 is in contact with the third partition plate 223; when dust reduction is performed, the push plate is driven to rotate by the driving assembly; Figure 3As shown, the four push plates in the left pump water box 220 rotate counterclockwise synchronously. During the rotation of the push plates, the first push plate 401 approaches the first partition plate 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 on the first partition plate 221. The water in the first chamber 225 can only flow to the atomizing nozzle 210. The water in the second chamber 226 flows to the third chamber 227 driven by the second push plate 402. The water in the third chamber 225 flows to the third chamber 228. The water in the fourth chamber 228 flows to the fourth chamber 228 driven by the third push plate 403, and the water in the fourth chamber 228 flows to the filter box 310; since the one-way valve 313 that can only allow air to enter is provided on the air inlet 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 pipe 330, and then leads to the atomizing nozzle 210, and the atomizing nozzle 210 mixes the water and air into atomized water, and sprays it to the construction site to complete the spray dust reduction work. In the above process, the second push plate 402 switches the blocking component 230 from the blocking state to the open state during the rotation process. 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 blocking component 230 is in the open state, the water in the water storage tank 110 is sucked into the second chamber 226.

[0027] After that, the driving mechanism 400 drives the four push plates to switch the rotation direction. Figure 3 As shown in the left pump water tank 220, the four push plates rotate clockwise, the blocking assembly 230 switches to the blocking 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 box 310 enters the fourth chamber 228. At this time, the fourth chamber 228 is in a negative pressure state, and the external dust-containing gas is sucked into the filter box 310 from the air inlet 312, and the dust-containing gas is filtered by the filter plate 320 to complete the filtering and dust reduction work.

[0028] In a further embodiment, the sealing assembly 230 includes a sealing plate 231 and a plurality of sealing springs 232. A slide 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 slide groove extends along the circumference of the pump water tank 220. The sealing plate 231 is slidably installed in the slide groove. The sealing plate 231 is fixedly connected with a switching protrusion 233 extending to the second chamber 226; a plurality of sealing springs 232 are distributed at intervals along the axial direction of the pump water tank 220, and the two ends of the sealing spring 232 are respectively connected to the pump water tank 220 and the sealing plate 231. The sealing spring 232 makes the sealing plate 231 tend to block the connecting port between the second chamber 226 and the water storage tank 110.

[0029] As the second push plate 402 approaches 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, thereby causing the blocking plate 231 to move into the slide groove, and the blocking spring 232 is compressed and stored. After that, the second chamber 226 is connected to the water tank 110. Since the second chamber 226 is in a negative pressure state, the water in the water tank 110 is sucked into the second chamber 226. A water pump can also be set in the water tank 110 to pump the water in the water 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 applies thrust to the switching protrusion 233, and the blocking plate 231 extends out of the slide groove under the action of the blocking spring 232, and blocks the connecting port between the second chamber 226 and the water 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.

[0030] In a further embodiment, the drive assembly includes a drive motor 405 and a transmission shaft 406, the transmission shaft 406 is coaxially installed on the pump water tank 220, the transmission shaft 406 is fixedly connected to a driving wheel 407, and a driven wheel 408 is fixedly connected to one end of the push plate facing the transmission shaft 406, the driven wheel 408 is meshed with the driving wheel 407, and the output end of the drive motor 405 is connected to the transmission shaft 406.

[0031] When dust reduction is performed, the driving motor 405 is started, and the driving motor 405 drives the transmission shaft 406 to rotate back and forth. 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.

[0032] In a further embodiment, a sensor is installed in the filter box 310, and 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, and the control system adjusts the reciprocating rotation angle of the drive shaft 406 according to the detection result of the sensor. The time of a single reciprocating rotation is equal. The more the amount of dust increased in the filter box 310 per unit time, the greater the reciprocating rotation angle of the drive shaft 406.

[0033] The more dust increases per unit time in the filter box 310, the greater the dust content in the air. At this time, the control system causes the transmission shaft 406 to reciprocate at a larger angle. Driven by the driving wheel 407 and the driven wheel 408, the larger the reciprocating angle of the four push plates in the four chambers, the more water mist the atomizing nozzle 210 sprays into the air each time, thereby ensuring the dust reduction effect.

[0034] When the amount of dust added per unit time in the filter box 310 is smaller, it means that the dust content in the air is smaller. At this time, the control system makes the transmission shaft 406 reciprocate at a smaller angle. Driven by the driving wheel 407 and the driven wheel 408, the four push plates reciprocate in the four chambers at a smaller angle, and the atomizing nozzle 210 sprays less water mist into the air each time, thereby avoiding excessive humidity in the air when the dust content in the air is small, affecting the storage of construction materials and the construction progress.

[0035] In a further embodiment, a plurality of pump water tanks 220 are provided. Figure 3 , Figure 4 , Figure 5 As 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 multiple atomizing nozzles 210, and multiple pump water tanks 220 can synchronously or alternately pump water in the water storage tank 110 to the atomizing nozzle 210, thereby improving dust reduction efficiency and ensuring dust reduction effect.

[0036] In a further embodiment, a baffle 314 is disposed in the filter box 310 , and the baffle 314 allows gas to pass through, thereby preventing dust in the filter box 310 from entering the gas pipe 330 and blocking the one-way pressure valve 331 .

[0037] In a further embodiment, the filter plate 320 is arc-shaped and can be elastically deformed; in the initial state, the center of the filter plate 320 is located above the filter plate 320. The water level in the filter box 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 toward the filter box 310, the filter plate 320 changes from a concave state to a convex state. Since the air inlet 312 is connected to a one-way valve 313, the gas in the filter box 310 cannot leave the filter box 310 from the air inlet 312, and can only pass into the air pipe 330 to assist the atomizing nozzle 210 in atomizing the water. When the fourth partition 224 pushes the water in the fourth chamber 228 to the third chamber 227, the water in the filter box 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 box 310 through the air inlet 312, filters the filter plate 320, and completes the filtering and dust reduction work.

[0038] At the moment when the filter plate 320 is deformed, the dust layer attached to the filter plate 320 tends to maintain its original shape. When the filter plate 320 is deformed, the dust layer is separated from the filter plate 320, and the water in the fourth chamber 228 enters the filter box 310, the water backwashes the filter plate 320, further separating the dust particles from the filter plate 320, thereby avoiding the filtering effect being affected by the dust attached to the filter plate 320.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should 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; The driving mechanism is used to make the filtering mechanism and the spraying mechanism work alternately.

2. A dust suppression device for urban construction sites according to claim 1, characterized in that: 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 a one-way valve, and the one-way valve allows air to enter the filter box only from the outside; 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, and the partitions extend along the radial direction of the pump water tank to divide the pump water tank 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 four chambers are filled with water; the first chamber is connected to a plurality of atomizing nozzles, and the plurality of atomizing nozzles are distributed at intervals along the axial direction of the pump water tank; the second chamber is connected to the water storage tank at a position close to the third chamber, and a plugging component is provided at the connection between the second chamber and the water storage tank, the plugging component has an open state and a blocked state, and when the plugging component is in the blocked state, the water storage tank is separated from the second chamber; when the plugging component is in the open state, the water storage tank is connected to the second chamber; the fourth chamber is connected to the filter box; The partition between the first cavity and the second cavity is the first partition, the partition between the second cavity and the third cavity is the second partition, the partition between the third cavity and the fourth cavity is the third partition, and the partition between the fourth cavity and the first cavity is the fourth partition; a plurality of through holes are provided on the first partition, the second partition and the third partition; a one-way valve is connected to the through hole of the first partition so that water can only flow from the second cavity to the first cavity; 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: The driving mechanism includes a driving assembly and four push plates, which are respectively installed in 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 to the driving assembly, and one 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 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; and the push plate in the fourth chamber 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