Building construction dust falling device and dust falling method

Abstract

The invention relates to the technical field of environmental protection engineering construction, in particular to a building construction dust falling device and a dust falling method. The dust falling device comprises a water conveying pipeline with a water conveying cavity and a flow discharging cavity, a spray head communicated with the water conveying cavity, a flow gathering cover arranged on the periphery of the spray head and fan blades arranged in the flow gathering cover. Wherein the water delivery cavity is communicated with the drainage cavity, and a water blocking valve is arranged at the communication position; one side of the fan blade is connected with a driven part located at the communicating position between the water conveying cavity and the drainage cavity. The flow gathering cover has a gathering state and an expansion state used for limiting the water blocking valve. According to the building construction dust falling device and the dust falling method, the water pressure in the water conveying cavity is increased by improving the power of the water pump, and the water pressure is used for driving the flow gathering cover to gather and driving the fan blades to rotate, so that water mist is blown to a construction site. In the process, only the power of the water pump needs to be improved, and therefore the fan blades do not need to be driven in an electric power mode.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection engineering construction, and specifically, to a dust reduction device and method for building construction. Background Art

[0002] Nowadays, people have higher and higher requirements for the environment and stronger and stronger awareness of environmental protection. The concept of environmental protection has penetrated into almost all industries; for example, in a construction site where dust is easily generated, it is necessary to meet environmental protection standards during construction and production to proceed normally; currently, when construction is carried out at a construction site, the construction area needs to be enclosed and blocked with a fence, and at the same time, sprinkler nozzles are provided at the upper edge of the fence, and the sprinkler nozzles form a layer of water mist; when the dust in the site diffuses to the edge of the fence, the dust combines with the water mist and settles, thereby effectively reducing the degree of dust escaping, and thus ensuring the air and environment outside the construction site to a certain extent and reducing air pollution.

[0003] However, this method also has many inconveniences: for example, most of the sprinkler nozzles are arranged at the edge of the fence. When the construction site is far from the fence, due to the long distance between the nozzles and the construction area, it is difficult for the water mist to contact the dust, thus affecting the dust reduction effect.

[0004] Although currently, an electric-driven fan can also be added near the nozzle to increase the floating distance of the water mist, there are usually multiple fences. Each time during disassembly and assembly, it is necessary to arrange wires and fans, which affects the disassembly and assembly efficiency. Secondly, since the fence is usually in an outdoor environment, there are often bad weather conditions such as rain and sun exposure. Such weather will also cause damage to the electric-driven fan, and at the same time, it is easy to have a phenomenon that the wire leaks electricity and the fence becomes electrified. Summary of the Invention

[0005] The purpose of the present invention is to provide a dust reduction device and method for building construction to solve the problems raised in the above background art.

[0006] To achieve the above purpose, one of the purposes of the present invention is to provide a dust reduction device for building construction, including a water delivery pipe having a water delivery cavity and a drainage cavity, a nozzle communicated with the water delivery cavity, a flow concentrating cover arranged outside the nozzle, and a fan blade arranged in the flow concentrating cover; wherein:

[0007] The water delivery cavity is communicated with the drainage cavity, and a water blocking valve is arranged at the communication part;

[0008] One side of the fan blade is connected with a driven part located at the communication part between the water delivery cavity and the drainage cavity;

[0009] The flow concentrating cover has a converging state and an expanding state for restricting the water blocking valve;

[0010] When the flow concentrator changes from the expanded state to the converged state, the water blocking valve controls the communication between the water delivery cavity and the drainage cavity, causing the driven part to drive the fan blades to rotate and switching the coverage area of the water mist from the first preset area to the second preset area.

[0011] As a further improvement of this technical solution, one end of the water delivery cavity penetrates through the end of the water delivery pipe to serve as the water inlet.

[0012] One end of the drainage cavity penetrates through the end of the water delivery pipe to serve as the drainage outlet.

[0013] As a further improvement of this technical solution, a connecting pipe is communicated in the water delivery cavity, and one end of the connecting pipe is communicated with the nozzle.

[0014] As a further improvement of this technical solution, the water delivery cavity and the drainage cavity are communicated through a water delivery pipeline, and the water delivery pipeline includes a volute arranged on the outer circle of the connecting pipe, and a water inlet pipe and a drain pipe communicated with the volute;

[0015] The water inlet pipe is communicated with the water delivery cavity, and the drain pipe is communicated with the drainage cavity;

[0016] The water blocking valve is arranged in the water inlet pipe, and the driven part is arranged in the volute;

[0017] The fan blades are rotatably sleeved on the outer circle of the connecting pipe.

[0018] As a further improvement of this technical solution, the driven part includes an impeller rotatably arranged in the volute, and the impeller is rotatably arranged on the outer circle of the connecting pipe;

[0019] A shaft tube for fixedly connecting the impeller and the fan blades or a magnetic connection is provided between the impeller and the fan blades.

[0020] As a further improvement of this technical solution, the flow concentrator includes a plurality of shroud plates arranged in an annular array, and a mounting ring arranged at one end of the outer circle of the shroud plate;

[0021] The mounting ring is fixed to the top of the water delivery pipe through a rod at the bottom;

[0022] The mounting ring is rotatably connected to one end of the shroud plate, and a torsion spring is arranged at the rotation connection. Under normal conditions, the plurality of shroud plates are restricted to the expanded state by the torsion spring.

[0023] As a further improvement of this technical solution, the water blocking valve includes a valve tube communicated with the water inlet pipe, and a valve rod slidably arranged in the valve tube;

[0024] One end of the valve rod can enter the water inlet pipe to block the water inlet pipe, and the end of the valve rod entering the shaft tube is of an arc-shaped structure;

[0025] A spring for elastically connecting the valve rod and the end of the valve tube is arranged between one side of the valve rod and the end of the valve tube. One end of the valve rod is fixedly connected with a push ring, and the outer ring of the push ring near one end of the cover plate is inwardly converged to form an inclined surface. When one end of the valve rod is in the water inlet pipe, the inclined surface of the push ring abuts against the end of the cover plate.

[0026] As a further improvement of the technical solution, the water pressure in the water delivery cavity is increased to force the water blocking valve to overcome the restraining force exerted by the flow concentrating cover.

[0027] As a further improvement of the technical solution, wind blocking plates for increasing wind resistance are arranged on the outer rings of the cover plates on both sides. The external wind force drives the corresponding cover plates to gather through the wind blocking plates, so that the water blocking valve overcomes the restraining force exerted by the flow concentrating cover under the original water pressure state.

[0028] The second object of the present invention is to provide a dust reduction method for a dust reduction device for building construction, including the following method steps:

[0029] S1. The water flow in the water delivery cavity passes through the connecting pipe and is sprayed out through the nozzle, and the sprayed water mist is around the fence;

[0030] S2. The wind blows towards the cover plate and forces the corresponding cover plate to gather. The end position of the cover plate changes after gathering, so as to disengage from the inclined surface of the outer ring of the push ring, so as to reduce the restraining force exerted on the valve tube;

[0031] S3. The original water pressure in the water inlet pipe overcomes the elastic force of the spring and the restraining force of the other cover plates, so as to open the water inlet pipe, make the water in the water inlet pipe start to flow and drive the fan blade to rotate, so as to blow the water mist towards the construction area.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. In the building construction dust reduction device and the dust reduction method, when the construction site is far away from the fence, by increasing the power of the water pump, the water pressure in the water delivery cavity is increased, and the water pressure is used to drive the flow concentrating cover to gather and the fan blade to rotate, so as to blow the water mist towards the construction site. Only by increasing the power of the water pump in this process is required, so there is no need to drive the fan blade by electricity.

[0034] 2. In the building construction dust reduction device and the dust reduction method, in the face of the influence of environments such as windy weather and passing vehicles, the flow concentrating cover can use the wind force to make the local part enter the gathering state, so that the fan blade rotates without manual intervention, and the blowing force of the fan blade is used to overcome the influence of the external wind force, so that the water mist can be in the construction area. Description of the Drawings

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 Schematic cross-sectional structure diagram of the water conveyance pipeline of the present invention;

[0037] Figure 3 Schematic structure diagram of the nozzle of the present invention;

[0038] Figure 4 Schematic structure diagram of the fan blade of the present invention;

[0039] Figure 5 Schematic structure diagram of the impeller of the present invention Figure 1 ;

[0040] Figure 6 Schematic structure diagram of the impeller of the present invention Figure 2 ;

[0041] Figure 7 Schematic structure diagram of the flow concentrator of the present invention;

[0042] Figure 8 Of the present invention Figure 7 Enlarged schematic diagram of the structure at position A;

[0043] Figure 9 Schematic structure diagram of the pressure regulating valve of the present invention;

[0044] Figure 10 Schematic structure diagram of the wind blocking plate of the present invention;

[0045] Figure 11 Schematic diagram of the stress state of the cover plate of the present invention.

[0046] The meanings of each label in the figure are as follows:

[0047] 100, fence; 101, construction area; 102, non-construction area; 103, high-pressure resistant pipe; 110, water conveyance pipeline; 111, water conveyance cavity; 112, drain cavity; 113, connecting column; 114, connecting pipe; 115, nozzle; 120, fan blade; 130, flow concentrator; 131, cover plate; 132, mounting ring; 133, mounting shaft; 134, torsion spring; 140, volute; 141, impeller; 142, shaft pipe; 143, water inlet pipe; 144, drain pipe; 150, water blocking valve; 151, valve stem; 152, valve pipe; 153, spring; 154, push ring; 160, wind blocking plate; 161, pressing arm. Specific embodiments

[0048] 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 present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0051] One of the purposes of the present invention is to provide a dust reduction device for building construction. The dust reduction device of the present invention is applicable but not limited to the upper part of the fence 100. By enclosing a plurality of fences 100 with each other, a construction area 101 is formed inside, and the outside of the fence 100 is a non-construction area 102. For the convenience of understanding, as Figure 1 shows the structure of the fence 100 on one side, and the construction area 101 and the non-construction area 102 are located on both sides of the fence 100 respectively. The dust reduction device is arranged on the top of the fence 100 and is arranged as a whole facing the construction area 101 to perform dust reduction treatment on the construction area 101.

[0052] As Figures 2 - 4As shown in the figure, the dust-removing device includes a water delivery pipe 110 having a water delivery cavity 111 and a water discharge cavity 112, a spray head 115 communicated with the water delivery cavity 111, a water converging cover 130 arranged on the outer periphery of the spray head 115, and a fan blade 120 arranged in the water converging cover 130; wherein, the water delivery cavity 111 is communicated with the water discharge cavity 112, and a water blocking valve 150 is arranged at the communication position, and one side of the fan blade 120 is connected with a driven part located at the communication position between the water delivery cavity 111 and the water discharge cavity 112; the water converging cover 130 has a converging state and an expanding state for restricting the water blocking valve 150; when the water converging cover 130 is switched from the expanding state to the converging state, the water blocking valve 150 controls the communication between the water delivery cavity 111 and the water discharge cavity 112, so that the driven part drives the fan blade 120 to rotate, and the coverage range of the water mist is switched from a first preset area (i.e., the area near the fence 100) to a second preset area (i.e., the area far from the fence 100).

[0053] Figure 2 The specific structures of the water delivery cavity 111 and the water discharge cavity 112 are shown. In the figure, a horizontal plate arranged inside the water delivery pipe 110 divides the internal space of the water delivery pipe 110 into upper and lower parts. Among them, the upper part is the water delivery cavity 111. One end of the water delivery cavity 111 penetrates through the end of the water delivery pipe 110 to serve as a water inlet, and the other end is a closed structure; in this way, after the water source enters the water delivery cavity 111 through the water inlet, since it cannot be discharged, the pressure in the water delivery cavity 111 is increased, so that the spray head 115 communicated with the water delivery cavity 111 can spray the water in the water delivery cavity 111 in the form of mist; the lower part is the water discharge cavity 112. One end of the water discharge cavity 112 penetrates through the end of the water delivery pipe 110 to serve as a drain outlet. In this embodiment, the water discharge cavity 112 is not directly communicated with the water delivery cavity 111. For the specific communication method, please refer to the following text. And, a plurality of connecting columns 113 are also communicated with the top of the water delivery pipe 110 for facilitating the connection of the spray head 115.

[0054] Next, Figure 3 The specific connection state of the spray head 115 is shown. In the figure, the spray head 115 is communicated with the connecting column 113 through a connecting pipe 114. The spray head 115 faces the construction area 101. At this time, the liquid in the water delivery cavity 111 flows into the connecting pipe 114 through the connecting column 113 and then is sprayed out through the spray head 115 to perform dust-removing treatment on the first preset area. And, the connecting pipe 114 has a straight section, and the length of the straight section corresponds to the setting state of the fan blade 120 and the water delivery pipeline.

[0055] In specific implementation, such as Figure 1As shown in the figure, there are three fences 100 in total. By installing a water delivery pipe 110 at the top of each fence 100, then selecting a water delivery pipe 110 on one of the edges, connecting a water pump (the water pump is connected to a water source) to the water delivery cavity 111 inside the water delivery pipe 110. Then, the adjacent two water delivery pipes 110 are connected by a high-pressure resistant pipe 103, that is, the adjacent two water delivery cavities 111 are connected by a high-pressure resistant pipe 103, and the adjacent two drainage cavities 112 are also connected by another high-pressure resistant pipe 103. Then, the drainage cavity 112 inside a water delivery pipe 110 on one edge is connected to the water source, so that the water in the drainage cavity 112 can flow back to the water source. At this time, the water is pressurized by the water pump and enters the water delivery cavity 111, then flows into the connecting pipe 114 through the connecting column 113, and is then sprayed out through the nozzle 115.

[0056] The water delivery cavity 111 and the drainage cavity 112 are connected through a water delivery pipeline. Figure 5 The specific structure of the water delivery pipeline is shown in the illustrated embodiment. As shown in the figure, it includes a volute 140 arranged on the outer circle of the connecting pipe 114, and a water inlet pipe 143 and a drain pipe 144 communicated with the volute 140; wherein, the water inlet pipe 143 is communicated with the water delivery cavity 111, and the drain pipe 144 is communicated with the drainage cavity 112; a water blocking valve 150 is arranged in the water inlet pipe 143, and the driven part is arranged in the volute 140.

[0057] Correspondingly, a through shaft hole is arranged inside the fan blade 120, so that the fan blade 120 is rotationally sleeved on the outer circle of the connecting pipe 114 through the shaft hole.

[0058] As a specific example. The driven part includes an impeller 141 rotatably arranged in the volute 140. A through shaft hole is also arranged inside the impeller 141, so that the impeller 141 is rotationally sleeved on the outer circle of the connecting pipe 114 through the shaft hole. And, in order to realize the connection between the impeller 141 and the fan blade 120. In this embodiment, a shaft pipe 142 for fixedly connecting the two is arranged between the impeller 141 and the fan blade 120. The shaft pipe 142 rotatably penetrates through one side of the volute 140, and the shaft pipe 142 is also sleeved on the outer circle of the connecting pipe 114. In this way, referring to Figure 6 , when the water in the water delivery cavity 111 flows into the volute 140 through the water inlet pipe 143, the water flow can drive the impeller 141 to rotate, so that the impeller 141 drives the fan blade 120 to rotate through the shaft pipe 142. At this time, the fan blade 120 rotates to blow the water mist towards the second preset area. And the water in the volute 140 flows into the drainage cavity 112 through the drain pipe 144.

[0059] In addition, a magnetic connection can also be arranged between the impeller 141 and the fan blade 120 to replace the shaft pipe 142. In this way, the rotating impeller 141 can drive the fan blade 120 to rotate through magnetic force.

[0060] The air-concentrating cover 130 has a conical structure with a large opening at one end and a small opening at the other end to increase the flow rate of the gas when it flows out from the end of the air-concentrating cover 130. Figure 7 The specific structure of the air-concentrating cover 130 is shown. As shown in the figure, the air-concentrating cover 130 includes a plurality of cover plates 131 arranged in an annular array, and a mounting ring 132 provided at one end of the outer circle of the cover plates 131. Among them, the mounting ring 132 is fixed to the top of the water delivery pipe 110 through the rod body at the bottom, and one end of the mounting ring 132 is rotatably connected to the cover plates 131. Specifically, as Figure 8 shown, a mounting shaft 133 is fixedly provided on the outer circle of the cover plate 131, a fixing block rotatably connected to the mounting shaft 133 is fixedly provided on the inner circle of the mounting ring 132, and a torsion spring 134 is provided between the mounting block and the mounting shaft 133. In the normal state, the plurality of cover plates 131 are restricted to an expanded state by the torsion spring 134.

[0061] When the construction site is close to the fence 100, the fan blades 120 do not need to rotate. For this reason, it is necessary to control the water flow, which is also the purpose of the water-blocking valve 150. Figure 9 The specific structure of the water-blocking valve 150 is shown. The water-blocking valve 150 includes a valve pipe 152 communicated with the water inlet pipe 143, and a valve rod 151 slidably arranged in the valve pipe 152. One end of the valve rod 151 can enter the water inlet pipe 143 to block the water inlet pipe 143, and one end of the valve rod 151 entering the shaft pipe 142 has an arc-shaped structure (refer to Figure 9 the structure of the valve rod 151 in the figure). A spring 153 elastically connecting the two is provided between one side of the valve rod 151 and the end of the valve pipe 152. The spring 153 restricts one end of the valve rod 151 in the water inlet pipe 143 in the normal state. A push ring 154 is fixedly connected to one end of the valve rod 151, and the outer circle of the end of the push ring 154 close to the cover plate 131 is inwardly converged to form an inclined surface; when one end of the valve rod 151 is in the water inlet pipe 143, the inclined surface of the push ring 154 abuts against the end of the cover plate 131 (refer to Figure 11 ). In this way, the water in the water inlet pipe 143 not only has to overcome the elastic force of the spring 153, but also the restrictive force exerted by the end of the cover plate 131 on the push ring 154.

[0062] The dust reduction process of the dust reduction device will be described in detail below.

[0063] When the construction site is in the first preset area (i.e., close to the fence 100), the water pump is controlled to be in a normal operating state. At this time, the elastic force of the spring 153 and the restrictive force of the cover plate 131 overcome the thrust exerted by the water flow in the water inlet pipe 143 on the valve rod 151 through the arc surface, that is, the valve rod 151 is still in the water inlet pipe 143 to block the water inlet pipe 143. In this state, the water in the water delivery cavity 111 only flows through the connecting pipe 114 and then is sprayed out through the nozzle 115. The sprayed water mist is around the fence 100 for dust reduction of the first preset area;

[0064] When the construction site is in the second preset area (i.e., far from the fence 100), the operating power of the water pump is increased to raise the water pressure in the water delivery cavity 111. At this time, the thrust exerted by the water pressure in the water inlet pipe 143 on the valve stem 151 through the arc surface overcomes the elastic force of the spring 153 and the restraining force of the cover plate 131, forcing the spring 153 to compress and drive the valve stem 151 to move. When the valve stem 151 moves towards the cover plate 131, it drives the push ring 154 to move. The movement of the push ring 154 makes the end of the cover plate 131 through the inclined surface on its outer ring, causing the cover plate 131 to rotate through the mounting shaft 133 to gather. At the same time, the movement of the valve stem 151 causes the water inlet pipe 143 to be opened, and the water in the water inlet pipe 143 flows into the volute 140 and drives the impeller 141. The impeller 141 drives the fan blades 120 to rotate through the shaft pipe 142, and the water in the volute 140 flows back into the discharge cavity 112 through the drain pipe 144. In this way, the airflow is gathered by the cover plate 131, and then the water mist is blown towards the second preset area by the rotating fan blades 120, realizing dust reduction in the second preset area.

[0065] That is to say, when the construction site is far from the fence 100, by increasing the power of the water pump, the water pressure in the water delivery cavity 111 is increased, and the water pressure is used to drive the flow concentrating cover 130 to gather and the fan blades 120 to rotate, realizing blowing the water mist towards the construction site. In this process, only the power of the water pump needs to be increased, so there is no need to drive the fan blades 120 by electricity.

[0066] Specifically, there are two ways for the flow concentrating cover 130 to switch from the expanded state to the gathered state. One is the above-mentioned way of increasing the water pressure in the water delivery cavity 111 to force the water blocking valve 150 to overcome the restraining force exerted on it (i.e., the water blocking valve 150) by the expanded flow concentrating cover 130, so that the flow concentrating cover 130 gathers; the other is to use the wind force in the external environment (such as natural wind, the airflow brought by vehicles during driving) to drive the flow concentrating cover 130 to gather. Next, the second way will be described in detail.

[0067] When the fence 100 is set around the road, that is, there are likely to be more vehicles in the non-construction area 102, especially around the expressway. When the driving speed of the vehicle is too fast, the airflow brought by the vehicle passing by will affect the movement of the water mist. Or, when the wind blows outside, the wind force will also interfere with the movement of the water mist. For this reason,

[0068] Such as Figure 10As shown, in one embodiment, wind blocking plates 160 are provided on the outer circles of the cover plates 131 on both sides, for increasing the wind resistance of the cover plates 131. In this way, when the wind blows outside, the external wind force drives the corresponding cover plates 131 to gather through the wind blocking plates 160, so as to reduce the restrictive force exerted by the cover plates 131 on the valve stem 151, and enable the original water pressure in the water inlet pipe 143 to drive the valve stem 151 to move.

[0069] Referring to Figure 11 , specifically during operation, taking the outside wind as an example, when the wind blows towards the wind blocking plate 160 (referring to the black arrow in Figure 10 ), a thrust is exerted on the cover plate 131 through the corresponding wind blocking plate 160, and at this time the cover plate 131 gathers. The end position of the cover plate 131 changes after gathering, so as to disengage from the inclined surface of the outer circle of the push ring 154. At this time, the push ring 154 no longer needs to drive one of the cover plates 131. At this time, the original water pressure in the water inlet pipe 143 can overcome the elastic force of the spring 153 and the restrictive force of the remaining cover plates 131, so as to open the valve pipe 152. At this time, the water in the water inlet pipe 143 starts to flow, causing the fan blade 120 to rotate to blow the water mist towards the construction area 101.

[0070] It should be noted that the pressure of the original water pressure can be preset. For example, when one of the cover plates 131 gathers, the original water pressure can drive the valve stem 151 to move.

[0071] Moreover, after the push ring 154 pushes the cover plate 131 to gather, the non-inclined surface part of the outer circle of the push ring 154 will move to the inner wall of the cover plate 131 (referring to Figure 9 ), making the cover plate 131 unable to reset to the expanded state. Only when the water pump is turned off and the valve stem 151 is reset can the cover plate 131 reset to the expanded state.

[0072] It can be seen that in the face of the influence of environments such as wind blowing and vehicles passing by, the flow concentrating cover 130 can use the wind force to make the local part enter the gathering state, so as to make the fan blade 120 rotate without manual intervention (or in a preset state, that is, preset the pressure of the water pressure), and use the blowing force of the fan blade 120 to overcome the influence of the external wind force, so that the water mist can be within the construction area 101.

[0073] To further reduce the restrictive force exerted by the cover plates 131 on the valve stem 151 during the wind blowing process, pressure arms 161 are provided on the outer circles of the cover plates 131 on both sides. Each pressure arm 161 is generally in a "U" - shaped structure, and the end of the pressure arm 161 faces the outer circle of the cover plate 131. In this way, when the external wind force blows the cover plates 131 on both sides to gather through the wind blocking plates 160, the cover plates 131 will drive the pressure arms 161 to move, and the movement of the pressure arms 161 will push the upper and lower cover plates 131 through the arc surface (referring to the white arrow in Figure 10 ), enabling the upper and lower cover plates 131 to also gather.

[0074] A second object of the present invention is to provide a dust reduction method for a dust reduction device for building construction, including the following method steps:

[0075] S1. The water flow in the water delivery cavity 111 passes through the connecting pipe 114 and is sprayed out through the nozzle 115, and the sprayed water mist is around the fence 100;

[0076] S2. The wind blows towards the cover plate 131 and forces the corresponding cover plate 131 to gather. The end position of the gathered cover plate 131 changes, so as to disengage from the inclined surface of the outer circle of the push ring 154, so as to reduce the restrictive force applied to the valve pipe 152;

[0077] S3. The original water pressure in the water inlet pipe 143 overcomes the elastic force of the spring 153 and the restrictive force of the remaining cover plates 131, thereby opening the water inlet pipe 143, enabling the water in the water inlet pipe 143 to start flowing and driving the fan blade 120 to rotate, so as to blow the water mist towards the construction area 101.

[0078] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust reduction device for building construction, characterized in that, It includes a water delivery pipe (110) having a water delivery cavity (111) and a drainage cavity (112), a spray head (115) communicating with the water delivery cavity (111), a flow concentrating cover (130) provided on the outer periphery of the spray head (115), and a fan blade (120) provided in the flow concentrating cover (130); wherein: The water delivery cavity (111) and the drainage cavity (112) are communicated, and a water blocking valve (150) is provided at the communication part; One side of the fan blade (120) is connected with a driven part located at the communication part between the water delivery cavity (111) and the drainage cavity (112); The flow concentrating cover (130) has a concentrating state and an expanding state for restricting the water blocking valve (150); When the flow concentrating cover (130) is switched from the expanding state to the concentrating state, the water blocking valve (150) controls the communication between the water delivery cavity (111) and the drainage cavity (112), so that the driven part drives the fan blade (120) to rotate, and the coverage area of the water mist is switched from a first preset area to a second preset area.

2. The dust reduction device for building construction according to claim 1, wherein One end of the water delivery cavity (111) penetrates through the end of the water delivery pipe (110) to serve as a water inlet; One end of the drainage cavity (112) penetrates through the end of the water delivery pipe (110) to serve as a drainage outlet.

3. The dust reduction device for building construction according to claim 1, wherein, A connecting pipe (114) is communicated in the water delivery cavity (111), and one end of the connecting pipe (114) is communicated with the spray head (115).

4. The construction dust reduction device according to claim 1, characterized in that, The water delivery cavity (111) and the drainage cavity (112) are communicated through a water delivery pipeline, and the water delivery pipeline includes a volute (140) provided on the outer circle of the connecting pipe (114), and a water inlet pipe (143) and a drainage pipe (144) communicated with the volute (140); The water inlet pipe (143) is communicated with the water delivery cavity (111), and the drainage pipe (144) is communicated with the drainage cavity (112); The water blocking valve (150) is provided in the water inlet pipe (143), and the driven part is provided in the volute (140); The fan blade (120) is rotatably sleeved on the outer circle of the connecting pipe (114).

5. The construction dust reduction device according to claim 4, characterized in that, The driven part includes an impeller (141) rotatably provided in the volute (140), and the impeller (141) is rotatably provided on the outer circle of the connecting pipe (114); A shaft pipe (142) for fixedly connecting the two or a magnetic connection between the impeller (141) and the fan blade (120) is provided between the impeller (141) and the fan blade (120).

6. The dust reduction device for building construction according to claim 1, characterized in that, The flow concentrating cover (130) includes a plurality of cover plates (131) arranged in an annular array, and a mounting ring (132) provided at one end of the outer circle of the cover plate (131); The mounting ring (132) is fixed to the top of the water delivery pipe (110) through a rod at the bottom; The mounting ring (132) is rotatably connected to one end of the cover plate (131), and a torsion spring (134) is provided at the rotation connection part. In the normal state, the plurality of cover plates (131) are restricted to the expanding state by the torsion spring (134).

7. The dust reduction device for building construction according to claim 4, characterized in that, The water blocking valve (150) includes a valve pipe (152) communicated with the water inlet pipe (143), and a valve rod (151) slidably provided in the valve pipe (152); One end of the valve stem (151) can enter the water inlet pipe (143) to block the water inlet pipe (143), and the end of the valve stem (151) entering the shaft pipe (142) is of an arc structure; A spring (153) for elastically connecting the two is arranged between one side of the valve stem (151) and the end of the valve pipe (152). One end of the valve stem (151) is fixedly connected with a push ring (154). The outer ring of the push ring (154) near one end of the cover plate (131) is inwardly converged to form an inclined surface. When one end of the valve stem (151) is in the water inlet pipe (143), the inclined surface of the push ring (154) abuts against the end of the cover plate (131).

8. The construction dust reduction device according to claim 1, characterized in that, By increasing the water pressure in the water delivery cavity (111) to force the water blocking valve (150) to overcome the restraining force exerted by the flow concentrating cover (130).

9. The dust reduction device for building construction according to claim 6, wherein, Air blocking plates (160) for increasing air resistance are arranged on the outer rings of the cover plates (131) on both sides. The external wind force drives the corresponding cover plates (131) to gather through the air blocking plates (160), so that the water blocking valve (150) overcomes the restraining force exerted by the flow concentrating cover (130) under the original water pressure state.

10. A dust reduction method for a construction dust reduction device as described in any one of claims 4-9, characterized in that, Including the following method steps: S1. The water flow in the water delivery cavity (111) flows through the connecting pipe (114) and is sprayed out through the nozzle (115), and the sprayed water mist is around the fence (100); S2. The wind blows towards the cover plate (131) and forces the corresponding cover plate (131) to gather. The end position of the gathered cover plate (131) changes, so as to disengage from the inclined surface of the outer ring of the push ring (154), so as to reduce the restraining force exerted on the valve pipe (152); S3. The original water pressure in the water inlet pipe (143) overcomes the elastic force of the spring (153) and the restraining force of the remaining cover plates (131), thereby opening the water inlet pipe (143), enabling the water in the water inlet pipe (143) to start flowing and driving the fan blade (120) to rotate, so as to blow the water mist towards the construction area (101).

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