Air dust settling equipment for construction site

Abstract

The invention relates to the technical field of dust falling devices, in particular to air dust falling equipment for a construction site. The construction site air dust settling equipment comprises an outer cylinder and a cathode center column, wherein a middle cylinder and an inner cylinder are fixedly arranged in the outer cylinder. The negatively charged gas and the positively charged water mist are easy to mix. The mixed water-gas mixture carries positive charges, and the water-gas mixture gradually gets close to the cathode central column under the action of an electric field formed by the positive charges of the conductive cylinder and the negative charges of the cathode central column, so that the water-gas mixture sprayed from the outer cylinder is not easy to diverge. The invention provides construction site air dust settling equipment, and aims to solve the problems that fog drops are dispersed in advance due to repulsion of liquid drops with charges of the same polarity in an existing electrostatic fog gun, and when the wind speed is low or the spraying speed is high, atomized liquid drops collide with one another and are fused into large liquid drops to fall down in advance; therefore, fog drops are difficult to be conveyed to a distance by wind power.

Description

Technical Field

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

[0002] Dust suppression devices are equipment or systems used to reduce the concentration of suspended particulate matter in the air during industrial production, construction, transportation and other processes. A spray cannon is a movable spray device that can be rotated 360 degrees and adjusted in pitch according to the actual conditions of the construction site. It can flexibly carry out targeted spray dust reduction on dust sources at different locations and heights. It usually has a large spray volume and a long range. For construction sites such as concrete mixing plants and sand and gravel yards that produce large amounts of dust and high concentrations, it can quickly reduce the dust concentration in the air and effectively improve the construction environment. However, the existing electrostatic fog cannons will make the droplets charged and easier to absorb dust, but the droplets will also be dispersed prematurely due to the repulsion of droplets of the same charge, making it difficult to be transported to a distant place by wind.

[0003] Corona discharge, also known as low-frequency discharge, is a local self-sustaining discharge of gas in an uneven electric field. When the surface curvature of an object is large (such as a sharp, small top), the equipotential surfaces are dense, and the electric field strength increases dramatically, causing the nearby air to be ionized and produce gas discharge. According to the polarity of the high-voltage corona electrode, it is divided into positive corona discharge and negative corona discharge. Positive corona discharge occurs at the anode of the high-voltage electrode, and negative corona discharge occurs at the cathode of the high-voltage electrode. Using a positive electrode for corona discharge requires connecting the sharp electrode to a positive high-voltage power supply and the flat electrode to ground or connect to the negative electrode.

[0004] The main function of an electrostatic generator is to generate static electricity. The output is usually of a single polarity, such as positive or negative. The output voltage can be adjusted. It is usually used in scientific research. Electrostatic applications include electrostatic dust removal, electrostatic spraying, generating electrostatic fields for biological effects research, and other places where static electricity is required.

[0005] For example, the invention patent application with the announcement number CN110935266A provides a spray fan and a fog cannon, which directly sprays water mist outward with the airflow by setting a nozzle and a water chamber on the fan body, forming a rotating atomization field with vorticity. The vorticity of the atomization field and the airflow field is superimposed, which greatly increases the range of the water mist. However, when the wind speed is low or the spray speed is fast, the atomized droplets of the fog cannon will collide and merge into large droplets and fall in advance, making it difficult for the droplets to be transported to a distant place by wind power. Summary of the invention

[0006] The present invention provides an air dust reduction device for a construction site, so as to solve the problems of the existing electrostatic fog cannon, that the fog droplets are dispersed in advance due to the repulsion of droplets of the same charge, and when the wind speed is low or the spray speed is fast, the atomized droplets collide and merge into large droplets and fall in advance, thus making it difficult for the fog droplets to be transported to a distant place by wind.

[0007] The present invention provides a construction site air dust reduction device that adopts the following technical solution: The construction site air dust reduction device includes an outer cylinder, a cathode center column, a first discharge mechanism, a water spray mechanism, and an air blowing mechanism. The outer cylinder is provided with a middle cylinder and an inner cylinder coaxially arranged with the outer cylinder, and the inner cylinder is located in the middle cylinder. The two ends of the outer cylinder are respectively a first end and a second end, and the air blowing mechanism provides an airflow from the first end to the second end of the outer cylinder.

[0008] The cathode center column is fixed in the inner cylinder and coaxial with the inner cylinder, and the cathode center column is negatively charged. The length of the inner cylinder is shorter than that of the middle cylinder, the space between the inner cylinder and the cathode center column is the first space, and the space between the middle cylinder and the cathode center column is the second space, and the first space and the second space are distributed in sequence along the direction from the first end to the second end of the outer cylinder.

[0009] A conductive cylinder is arranged coaxially with the middle cylinder in the middle cylinder, and the conductive cylinder is in the second space and is positively charged. The negatively charged cathode center column and the positively charged conductive cylinder form an electric field in the second space. The water spray mechanism includes a plurality of nozzles distributed around the inner cylinder, and the water mist sprayed by the nozzles is positively charged.

[0010] The first discharge mechanism is used to negatively charge the gas passing through the first space, and make the charge of the gas smaller than the charge of the water mist, so that the water-gas mixture formed by mixing the negatively charged gas and the positively charged water mist is positively charged. Under the action of the electric field, the water-gas mixture gradually approaches the cathode center column, so that the water-gas mixture is not easy to disperse.

[0011] Furthermore, the first discharge mechanism includes an insulating mounting ring, a first rotating ring, a plurality of first tip conductive plates, and a plurality of first flat conductive plates. The first rotating ring is rotatably disposed in the inner cylinder, and the first rotating ring and the inner cylinder are coaxially disposed. The first tip conductive plate and the first flat conductive plate are both fixedly disposed in the first rotating ring, and the plurality of first tip conductive plates and the plurality of first flat conductive plates are alternately distributed in sequence along the circumference of the first rotating ring. A plurality of first tips are fixedly disposed on the first tip conductive plate.

[0012] The insulating mounting ring is fixedly arranged inside the inner cylinder, and the insulating mounting ring and the inner cylinder are coaxially arranged. A cathode conductive ring and an anode conductive ring are fixedly arranged on the insulating mounting ring. The cathode conductive ring and the anode conductive ring are coaxially arranged with the insulating mounting ring. A first brush is fixedly arranged on each first tip conductive plate, and the first brush and the cathode conductive ring are offset. A second brush is fixedly arranged on each first flat conductive plate, and the second brush and the anode conductive ring are offset. High voltage is passed through the cathode conductive ring, and the first tip connected to the cathode conductive ring cooperates with the first flat conductive plate connected to the anode conductive ring to release negative electricity.

[0013] Furthermore, an insulating tube is fixedly arranged on the cathode center column, the insulating tube and the cathode center column are coaxially arranged, and the insulating tube is located in the first space. The first tip conductive plate and the first flat conductive plate are both fixedly connected to the insulating tube.

[0014] Furthermore, the water spraying mechanism includes a water pump, a water pipe and an annular pipe. The annular pipe is fixedly arranged at one end of the inner tube close to the second end of the outer tube, and the annular pipe and the inner tube are coaxially arranged. A plurality of spray heads are fixedly arranged on the annular pipe. The water pipe and the annular pipe are fixedly connected, and the water pump and the water pipe are fixedly connected.

[0015] Furthermore, the hair dryer mechanism comprises a motor and a fan. The motor is fixedly arranged in the outer tube, and the fan is fixedly connected to the output shaft of the motor.

[0016] Furthermore, a plurality of first slanted grooves and a plurality of second slanted grooves are provided in the first rotating ring, and the plurality of first slanted grooves and the plurality of second slanted grooves are sequentially distributed along the circumference of the first rotating ring. The first slanted grooves and the second slanted grooves are arranged alternately. Each first tip conductive plate is fixedly arranged in a first slanted groove. Each first flat conductive plate is fixedly arranged in a second slanted groove.

[0017] Furthermore, a construction site air dust reduction device also includes a second discharge mechanism, which includes a discharge power supply, a second rotating ring, a plurality of second tip conductive plates and a plurality of second flat conductive plates. The second rotating ring is fixedly arranged in the outer cylinder, and the second rotating ring is located between the outer cylinder and the middle cylinder.

[0018] The second tip conductive plate and the second flat conductive plate are both fixedly arranged in the second rotating ring, and the plurality of second tip conductive plates and the plurality of second flat conductive plates are alternately distributed in sequence along the circumference of the second rotating ring. A plurality of second tips are fixedly arranged on both sides of the second tip conductive plate. The second tip conductive plate is connected to the positive electrode of the discharge power supply, and the second flat conductive plate is connected to the negative electrode of the discharge power supply. The positive electrode of the discharge power supply is connected to high voltage, and the second tip and the second flat conductive plate cooperate to discharge positive electricity.

[0019] Furthermore, an insulating cylinder is fixedly arranged in the middle cylinder, the insulating cylinder and the middle cylinder are coaxially arranged, a plurality of guide plates are fixedly arranged in the insulating cylinder, the guide plates are arranged along the axial direction of the insulating cylinder, and the plurality of guide plates are sequentially distributed along the circumference of the insulating cylinder. The guide plates are located in the second space.

[0020] Furthermore, the materials of the middle tube, the inner tube and the outer tube are all insulating materials.

[0021] Furthermore, a construction site air dust reduction device also includes a bracket, and the outer cylinder is arranged on the bracket. Two rotating shafts are fixedly arranged on the outer peripheral wall of the outer cylinder, and the two rotating shafts are sequentially distributed along the circumference of the outer cylinder. Each rotating shaft is arranged along the radial direction of the outer cylinder and the two rotating shafts are arranged coaxially. The rotating shaft is rotatably arranged on the bracket. A hydraulic cylinder is fixedly arranged on the bracket, and the extended end of the hydraulic cylinder is fixedly connected to the outer cylinder.

[0022] The beneficial effects of the present invention are as follows: the air dust reduction equipment for construction sites of the present invention, through the cathode central column, the first discharge mechanism, the water spray mechanism and the air blowing mechanism, the gas entering the second space from the first space of the inner cylinder is negatively charged, and the negatively charged gas and the positively charged water mist are easy to mix. The gas entering the second space from the middle cylinder forms a wrapping effect on the gas and water mist entering the second space from the first space, so that the gas and liquid can be better mixed. And because the water mist is positively charged, under the action of the electric field, the water mist moves in the direction close to the cathode central column, so as to better mix with the gas entering the second space from the first space, so that the water mist can be better carried away by the gas.

[0023] By making the charge of the positively charged water mist greater than the charge of the negatively charged gas, the mixed water-gas mixture is positively charged. Under the action of the electric field, the water-gas mixture gradually approaches the cathode center column, making the water-gas mixture sprayed from the outer cylinder less likely to disperse. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 labor.

[0025] Figure 1 A schematic diagram of the structure of a construction site air dust reduction device provided by an embodiment of the present invention; Figure 2 A cross-sectional view of a construction site air dust reduction device provided by an embodiment of the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 for Figure 2 The enlarged view of point B in the middle; Figure 5 An exploded diagram of a construction site air dust reduction device provided by an embodiment of the present invention; Figure 6 A partial structural schematic diagram of a construction site air dust reduction device provided by an embodiment of the present invention; Figure 7 for Figure 6 Enlarged view of point C in the middle; Figure 8 A schematic structural diagram of a first rotating ring of a construction site air dust reduction device provided by an embodiment of the present invention; Fig. 9 A cross-sectional view of an outer cylinder, a middle cylinder and an inner cylinder of an air dust reduction device for a construction site provided by an embodiment of the present invention; Fig.10 A schematic diagram of the corona discharge of a construction site air dust reduction device provided in an embodiment of the present invention.

[0026] In the figure: 100, bracket; 110, hydraulic cylinder; 200, outer cylinder; 201, rotating shaft; 210, middle cylinder; 211, guide plate; 212, insulating cylinder; 220, inner cylinder; 230, conductive cylinder; 240, first space; 250, second space; 300, cathode center column; 310, insulating tube; 400, nozzle; 410, water pipe; 420, annular tube; 500, insulating mounting ring; 501, anode conductive ring; 502, cathode conductive ring; 510, first rotating ring; 511, first chute; 512, second chute; 520, first tip conductive plate; 521, first brush; 530, first flat conductive plate; 531, second brush; 600, motor; 610, fan; 700, second rotating ring; 710, second tip conductive plate; 720, second flat conductive plate. DETAILED DESCRIPTION

[0027] 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 creative work are within the scope of protection of the present invention.

[0028] Reference Figures 1 to 10As shown, an embodiment of the present invention provides an air dust reduction device for a construction site, comprising an outer cylinder 200, a cathode center column 300, a first discharge mechanism, a water spray mechanism, and an air blowing mechanism. A middle cylinder 210 and an inner cylinder 220 are fixedly arranged in the outer cylinder 200, and the middle cylinder 210, the inner cylinder 220 and the outer cylinder 200 are coaxially arranged, and the inner cylinder 220 is in the middle cylinder 210. The two ends of the outer cylinder 200 are respectively a first end and a second end. The air blowing mechanism provides an airflow from the first end to the second end of the outer cylinder 200 into the outer cylinder 200.

[0029] The cathode central column 300 is fixedly arranged in the outer cylinder 200, the cathode central column 300 and the outer cylinder 200 are coaxially arranged, and the cathode central column 300 is inside the inner cylinder 220, and the cathode central column 300 is negatively charged as a whole. The length of the inner cylinder 220 is shorter than the length of the middle cylinder 210. The space between the inner cylinder 220 and the cathode central column 300 is the first space 240. The space between the middle cylinder 210 and the cathode central column 300 is the second space 250, and the first space 240 and the second space 250 are distributed in sequence along the direction from the first end to the second end of the outer cylinder 200.

[0030] A conductive cylinder 230 is fixedly arranged in the middle cylinder 210, and the conductive cylinder 230 and the middle cylinder 210 are arranged coaxially, and the conductive cylinder 230 is in the second space 250, and the conductive cylinder 230 is positively charged. A first power supply is arranged on the outer cylinder 200, and the positive pole of the first power supply is connected to the conductive cylinder 230, so that the conductive cylinder 230 is positively charged. The negative pole of the first power supply is connected to the cathode center column 300, so that the cathode center column 300 is negatively charged. The negatively charged cathode center column 300 and the positively charged conductive cylinder 230 form an electric field in the second space 250; the water spraying mechanism includes a plurality of nozzles 400 distributed around the inner cylinder 220, and the plurality of nozzles 400 are sequentially distributed along the circumference of the inner cylinder 220. The water mist sprayed by the nozzle 400 is positively charged.

[0031] The first discharge mechanism is used to negatively charge the gas passing through the first space 240, and to make the charge of the negatively charged gas less than the charge of the positively charged water mist. Negatively charged gas and positively charged water mist are easy to mix. The gas entering the second space 250 from the middle cylinder 210 forms a wrapping effect on the gas and water mist entering the second space 250 from the first space 240, so that the gas and liquid can be better mixed. And because the water mist is positively charged, under the action of the electric field, the water mist moves in the direction close to the cathode center column 300, so as to better mix with the gas entering the second space 250 from the first space 240, so that the water mist can be better carried away by the gas.

[0032] By making the charge of the positively charged water mist greater than the charge of the negatively charged gas, the mixed water-gas mixture is positively charged. Under the action of the electric field, the water-gas mixture gradually approaches the cathode center column 300, thereby making the water-gas mixture sprayed from the outer tube 200 less likely to disperse.

[0033] In this embodiment, the first discharge mechanism includes an insulating mounting ring 500 , a first rotating ring 510 , a plurality of first tip conductive plates 520 , and a plurality of first flat conductive plates 530 .

[0034] The first rotating ring 510 is rotatably disposed in the inner cylinder 220, and the first rotating ring 510 and the inner cylinder 220 are coaxially disposed. The first tip conductive plate 520 and the first flat conductive plate 530 are both fixedly disposed in the first rotating ring 510, and a plurality of first tip conductive plates 520 and a plurality of first flat conductive plates 530 are sequentially distributed along the circumference of the first rotating ring 510, and the first tip conductive plates 520 and the first flat conductive plates 530 are staggered. The first tip conductive plate 520 is fixedly disposed with a plurality of first tips on both sides along the circumference of the first rotating ring 510.

[0035] The insulating mounting ring 500 is fixedly arranged inside the inner cylinder 220, and the insulating mounting ring 500 and the inner cylinder 220 are coaxially arranged. A cathode conductive ring 502 and an anode conductive ring 501 are fixedly arranged on the insulating mounting ring 500. The cathode conductive ring 502 and the anode conductive ring 501 are coaxially arranged with the insulating mounting ring 500. A first brush 521 is fixedly arranged on each first tip conductive plate 520, and the first brush 521 and the cathode conductive ring 502 are against each other. A second brush 531 is fixedly arranged on each first flat conductive plate 530, and the second brush 531 and the anode conductive ring 501 are against each other. The cathode conductive ring 502 is passed through high voltage, and the first tip connected to the cathode conductive ring 502 cooperates with the first flat conductive plate 530 connected to the anode conductive ring 501 to generate negative corona discharge, thereby generating negative electricity. The airflow passing through the first space 240 is negatively charged after passing through the first tip conductive plate 520 and the first flat conductive plate 530.

[0036] In this embodiment, an insulating tube 310 is fixedly disposed on the cathode central column 300. The insulating tube 310 and the cathode central column 300 are coaxially disposed and the insulating tube 310 is located in the first space 240. The first tip conductive plate 520 and the first flat conductive plate 530 are both fixedly connected to the insulating tube 310.

[0037] In this embodiment, the water spraying mechanism includes a water pump, an electrostatic generator, a water pipe 410 and an annular pipe 420. The annular pipe 420 is fixedly arranged at one end of the inner tube 220 close to the second end of the outer tube 200, and the annular pipe 420 and the inner tube 220 are coaxially arranged. A plurality of nozzles 400 are fixedly arranged on the annular pipe 420. The water pipe 410 and the annular pipe 420 are fixedly connected. The water pump and the water pipe 410 are fixedly connected, and the electrostatic generator and the water pipe 410 are connected to provide positive charge for the liquid in the water pipe 410. When the water pump is started, the liquid enters the annular pipe 420 through the water pipe 410, and is finally sprayed out through the plurality of nozzles 400. Under the action of the electrostatic generator, the water mist sprayed by the nozzle 400 is positively charged.

[0038] In this embodiment, the hair dryer mechanism includes a motor 600 and a fan 610. The motor 600 is fixedly disposed in the outer cylinder 200, and the fan 610 is fixedly connected to the output shaft of the motor 600. The fan 610 includes a plurality of blades, and the blades are arranged at an angle.

[0039] In this embodiment, a plurality of first slanted grooves 511 and a plurality of second slanted grooves 512 are provided in the first rotating ring 510, and the plurality of first slanted grooves 511 and the plurality of second slanted grooves 512 are sequentially distributed along the circumference of the first rotating ring 510. The first slanted grooves 511 and the second slanted grooves 512 are arranged alternately. Each first tip conductive plate 520 is fixedly arranged in a first slanted groove 511. Each first flat conductive plate 530 is fixedly arranged in a second slanted groove 512. Since the blades on the fan 610 are arranged at an angle, the first tip conductive plate 520 and the first flat conductive plate 530 are arranged at an angle, so the airflow passing through the first space 240 is spiral, which facilitates the airflow to mix with the water mist after entering the second space 250.

[0040] In this embodiment, a construction site air dust reduction device further includes a second discharge mechanism, which includes a discharge power supply, a second rotating ring 700, a plurality of second tip conductive plates 710, and a plurality of second flat conductive plates 720. The second rotating ring 700 is fixedly disposed in the outer cylinder 200, and the second rotating ring 700 is located between the outer cylinder 200 and the middle cylinder 210.

[0041] The second tip conductive plate 710 and the second flat conductive plate 720 are both fixedly arranged in the second rotating ring 700, and the plurality of second tip conductive plates 710 and the plurality of second flat conductive plates 720 are sequentially distributed along the circumference of the second rotating ring 700. The second tip conductive plates 710 and the second flat conductive plates 720 are alternately arranged. The second tip conductive plate 710 is fixedly provided with a plurality of second tips on both sides along the circumference of the second rotating ring 700; the second tip conductive plate 710 is connected to the positive electrode of the discharge power supply, and the second flat conductive plate 720 is connected to the negative electrode of the discharge power supply. The positive electrode of the discharge power supply is connected to high voltage, and the second tip and the second flat conductive plate 720 cooperate to generate positive corona discharge, thereby releasing positive electricity.

[0042] The airflow passing through the outer tube 200 and the middle tube 210 is positively charged after passing through the second tip conductive plate 710 and the second flat conductive plate 720. The positively charged airflow is ejected from the outer tube 200 to wrap the water vapor mixture, thereby forming an air cover to prevent the water vapor mixture from dispersing prematurely, thereby allowing the water mist to be transported farther.

[0043] In this embodiment, an insulating cylinder 212 is fixedly arranged in the middle cylinder 210, and the insulating cylinder 212 and the middle cylinder 210 are coaxially arranged. A plurality of guide plates 211 are fixedly arranged in the insulating cylinder 212, and the guide plates 211 are arranged along the axial direction of the insulating cylinder 212. The plurality of guide plates 211 are sequentially distributed along the circumference of the insulating cylinder 212, and the guide plates 211 are in the second space 250. The plurality of guide plates 211 make the sprayed water vapor mixture more uniform.

[0044] In this embodiment, the materials of the middle cylinder 210 , the inner cylinder 220 and the outer cylinder 200 are all insulating materials.

[0045] In this embodiment, a construction site air dust reduction device also includes a bracket 100, and an outer cylinder 200 is arranged on the bracket 100. Two rotating shafts 201 are fixedly arranged on the outer peripheral wall of the outer cylinder 200, and the two rotating shafts 201 are distributed in sequence along the circumference of the outer cylinder 200. Each rotating shaft 201 is arranged along the radial direction of the outer cylinder 200 and the two rotating shafts 201 are arranged coaxially. The rotating shaft 201 is rotatably arranged on the bracket 100. A hydraulic cylinder 110 is fixedly arranged on the bracket 100, and the extended end of the hydraulic cylinder 110 is fixedly connected to the second end of the outer cylinder 200. When the hydraulic cylinder 110 is started, the extended end of the hydraulic cylinder 110 is extended or shortened to change the inclination angle of the outer cylinder 200.

[0046] Working process: start the motor 600, the motor 600 drives the fan 610 to rotate, and the fan 610 generates airflow from the first end to the second end of the outer cylinder 200 when rotating. When the airflow passes through the inner cylinder 220 and the middle cylinder 210, it is divided into three airflows. The airflow passing through the inner cylinder 220 is the first airflow, the airflow passing between the inner cylinder 220 and the middle cylinder 210 is the second airflow, and the airflow passing between the outer cylinder 200 and the middle cylinder 210 is the third airflow.

[0047] After being energized, the first tip conductive plate 520 and the first flat conductive plate 530 cooperate with each other to release negative electricity. The first airflow is positively charged after passing through the first tip conductive plate 520 and the first flat conductive plate 530 , and the positively charged airflow enters the second space 250 .

[0048] The water pump is started, and the liquid enters the annular tube 420 through the water pipe 410, and is finally sprayed out through the multiple nozzles 400. Under the action of the electrostatic generator, the water mist sprayed by the nozzle 400 is positively charged. Since the first airflow is negatively charged and the water mist is positively charged, the first airflow and the water mist can be better mixed. After the second airflow enters the second space 250, it forms a wrapping effect on the first airflow and the water mist, so that the gas and liquid can be better mixed.

[0049] Since the blades on the fan 610 are tilted, the first tip conductive plate 520 and the first flat conductive plate 530 are tilted, the first airflow is spiral, which is easier to mix with the water mist. And since the conductive cylinder 230 is positively charged and the cathode center column 300 is negatively charged, an electric field is formed in the second space 250, and the water mist is positively charged, so under the action of the electric field, the water mist moves toward the direction close to the cathode center column 300, so as to better mix with the first airflow. The water mist is better mixed with the gas so that the water mist can be better taken away by the gas.

[0050] And because the charge of the positively charged water mist is greater than the charge of the negatively charged gas, the mixed water-gas mixture carries a positive charge. Under the action of the electric field in the second space 250, the water-gas mixture gradually approaches the cathode center column 300, so that the water-gas mixture is not easy to disperse when it is sprayed out of the outer cylinder 200.

[0051] The second pointed conductive plate 710 and the second flat conductive plate 720 generate positive charges after being energized, and the third airflow is positively charged after passing through the second pointed conductive plate 710 and the second flat conductive plate 720. The positively charged third airflow is ejected from the outer tube 200 and wraps the water vapor mixture, thereby forming an air cover to prevent the water vapor mixture from dispersing prematurely, thereby allowing the water mist to be transported farther.

[0052] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction site air dust reduction device, characterized by: It comprises an outer cylinder, a cathode center column, a first discharge mechanism, a water spray mechanism and an air blowing mechanism; a middle cylinder and an inner cylinder coaxially arranged with the outer cylinder are arranged in the outer cylinder, and the inner cylinder is arranged in the middle cylinder; the two ends of the outer cylinder are respectively a first end and a second end, and the air blowing mechanism provides an airflow from the first end to the second end of the outer cylinder; The cathode central column is fixed in the inner cylinder and coaxial with the inner cylinder, and the cathode central column is negatively charged; the length of the inner cylinder is shorter than the length of the middle cylinder, the space between the inner cylinder and the cathode central column is the first space, and the space between the middle cylinder and the cathode central column is the second space, and the first space and the second space are distributed in sequence along the direction from the first end to the second end of the outer cylinder; A conductive cylinder coaxially arranged with the middle cylinder is arranged in the middle cylinder, the conductive cylinder is in the second space, and the conductive cylinder is positively charged; the negatively charged cathode center column and the positively charged conductive cylinder form an electric field in the second space; the water spraying mechanism includes a plurality of nozzles distributed around the inner cylinder, and the water mist sprayed by the nozzles is positively charged; The first discharge mechanism is used to negatively charge the gas passing through the first space, and make the charge of the gas smaller than the charge of the water mist, so that the water-gas mixture formed by mixing the negatively charged gas and the positively charged water mist is positively charged. Under the action of the electric field, the water-gas mixture gradually approaches the cathode center column, so that the water-gas mixture is not easy to disperse.

2. The construction site air dust reduction equipment according to claim 1, characterized in that: The first discharge mechanism includes an insulating mounting ring, a first rotating ring, a plurality of first tip conductive plates and a plurality of first flat conductive plates; the first rotating ring is rotatably arranged in the inner cylinder, and the first rotating ring and the inner cylinder are coaxially arranged; the first tip conductive plate and the first flat conductive plate are both fixedly arranged in the first rotating ring, and the plurality of first tip conductive plates and the plurality of first flat conductive plates are alternately distributed in sequence along the circumference of the first rotating ring; a plurality of first tips are fixedly arranged on the first tip conductive plate; The insulating mounting ring is fixedly arranged inside the inner cylinder, and the insulating mounting ring and the inner cylinder are coaxially arranged; a cathode conductive ring and an anode conductive ring are fixedly arranged on the insulating mounting ring; the cathode conductive ring and the anode conductive ring are coaxially arranged with the insulating mounting ring; a first brush is fixedly arranged on each first tip conductive plate, and the first brush and the cathode conductive ring are offset; a second brush is fixedly arranged on each first flat conductive plate, and the second brush and the anode conductive ring are offset, high voltage is passed through the cathode conductive ring, and the first tip connected to the cathode conductive ring cooperates with the first flat conductive plate connected to the anode conductive ring to release negative electricity.

3. The construction site air dust reduction equipment according to claim 2, characterized in that: An insulating tube is fixedly arranged on the cathode center column. The insulating tube and the cathode center column are coaxially arranged. The insulating tube is located in the first space. The first tip conductive plate and the first flat conductive plate are both fixedly connected to the insulating tube.

4. The construction site air dust reduction equipment according to claim 1, characterized in that: The water spray mechanism includes a water pump, a water pipe and an annular pipe; the annular pipe is fixedly arranged at one end of the inner tube close to the second end of the outer tube, and the annular pipe and the inner tube are coaxially arranged; a plurality of nozzles are fixedly arranged on the annular pipe; the water pipe and the annular pipe are fixedly connected, and the water pump and the water pipe are fixedly connected.

5. The construction site air dust reduction equipment according to claim 1, characterized in that: The hair dryer mechanism comprises a motor and a fan; the motor is fixedly arranged in the outer cylinder, and the fan and the output shaft of the motor are fixedly connected.

6. The construction site air dust reduction equipment according to claim 4, characterized in that: A plurality of first inclined grooves and a plurality of second inclined grooves are provided in the first rotating ring, and the plurality of first inclined grooves and the plurality of second inclined grooves are distributed in sequence along the circumference of the first rotating ring; the first inclined grooves and the second inclined grooves are arranged alternately; each first pointed conductive plate is fixedly arranged in a first inclined groove; and each first flat conductive plate is fixedly arranged in a second inclined groove.

7. The construction site air dust reduction equipment according to claim 1, characterized in that: It also includes a second discharge mechanism, which includes a discharge power supply, a second rotating ring, a plurality of second tip conductive plates, and a plurality of second flat conductive plates; the second rotating ring is fixedly disposed in the outer cylinder, and the second rotating ring is located between the outer cylinder and the middle cylinder; The second tip conductive plate and the second flat conductive plate are both fixedly arranged in the second rotating ring, and the plurality of second tip conductive plates and the plurality of second flat conductive plates are alternately distributed in sequence along the circumference of the second rotating ring; a plurality of second tips are fixedly arranged on both sides of the second tip conductive plate; the second tip conductive plate is connected to the positive electrode of the discharge power supply, and the second flat conductive plate is connected to the negative electrode of the discharge power supply, and a high voltage is applied to the positive electrode of the discharge power supply, and the second tip and the second flat conductive plate cooperate to discharge positive electricity.

8. The construction site air dust reduction equipment according to claim 1, characterized in that: An insulating cylinder is fixedly arranged in the middle cylinder, the insulating cylinder and the middle cylinder are coaxially arranged, a plurality of guide plates are fixedly arranged in the insulating cylinder, the guide plates are arranged along the axial direction of the insulating cylinder, and the plurality of guide plates are sequentially distributed along the circumference of the insulating cylinder; and the guide plates are in the second space.

9. The construction site air dust reduction equipment according to claim 1, characterized in that: The materials of the middle tube, inner tube and outer tube are all insulating materials.

10. The construction site air dust reduction equipment according to claim 9, characterized in that: It also includes a bracket, and the outer cylinder is arranged on the bracket; two rotating shafts are fixedly arranged on the outer peripheral wall of the outer cylinder, and the two rotating shafts are distributed in sequence along the circumference of the outer cylinder; each rotating shaft is arranged along the radial direction of the outer cylinder and the two rotating shafts are arranged coaxially; the rotating shaft is rotatably arranged on the bracket; a hydraulic cylinder is fixedly arranged on the bracket, and the extended end of the hydraulic cylinder is fixedly connected to the outer cylinder.

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