Building construction dust fall structure and dust fall construction method

Abstract

The invention relates to the technical field of building construction, and discloses a building construction dust fall structure which comprises an exhaust cylinder provided with an air inlet channel and an air outlet channel, an exhaust fan is arranged in the air inlet channel, an atomizing nozzle is arranged in the air outlet channel, the exhaust cylinder further comprises a plurality of back-flushing channels and an air inlet, a filter is arranged at the air inlet, a partition plate is arranged in each back-flushing channel, and the filter is arranged in the partition plate. The controller is used for controlling the connection between the recoil channel and the air inlet and the connection between the air inlet channel and the air inlet; air flow in the air inlet channel flows to the air outlet channel and the plurality of backflushing channels, under the blocking of the partition plate, the air inlets communicated with the air inlet channel and the corresponding backflushing channels are in a separated state, at least one group of air inlets are communicated with the air inlet channel, and at least one group of air inlets are communicated with the backflushing channels at the same time; the dust falling structure is used for executing the dust falling method capable of being cleaned circularly, and has the advantages that the dust falling structure is not limited by the dust falling structure, and the dust falling structure of the air inlet can still be effectively cleaned during continuous operation.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a building construction dust reduction structure and a dust reduction construction method. Background Art

[0002] At present, construction sites are dusty, especially when earth-moving vehicles and other engineering vehicles pass by the road, the dust becomes heavier, which can easily cause serious environmental pollution and cause great harm to human health, and may even cause safety accidents. Currently, most construction sites use fog cannons for spray dust reduction.

[0003] The fog cannon uses spray to reduce dust in the space in front of it. The air sucked in by its fan comes from the rear of the fog cannon. Therefore, a large amount of impurities will be sucked into the fog cannon. Not only will they be deposited on the cylinder wall and fan blades, creating resistance to the operation of the fan, but part of the spray will also combine with the impurities sucked into the fan before being blown out and diffused. Therefore, at least part of the spray is in a saturated state before being sprayed out, and after dispersion, it cannot combine with impurities in the air, greatly reducing the dust reduction effect on the area in front to be reduced dust.

[0004] In order to ensure the dust reduction effect in a specific area, the spray volume has to be increased to make up for the spray volume lost before diffusion by increasing water consumption. However, in fact, the consumed spray cannot be quantified and the spray volume cannot be adjusted in real time according to the actual consumption. Therefore, for construction sites that require dust reduction around the clock, this solution of increasing the spray volume greatly increases the consumption of water resources and reduces economic practicality.

[0005] A Chinese patent application with application number 2024106919545 discloses an earthwork dust reduction device for a construction site. In order to solve the problem of impurities entering the interior of the cylinder, a filter is provided at the front end of the first cylinder to filter the external air and prevent impurities from entering the first cylinder and the second cylinder.

[0006] A Chinese patent application with application number 2023224444719 discloses a dust reduction fog cannon for construction. Similarly, in order to solve the problem of impurities entering the interior of the barrel, the patent scheme has a dustproof mechanism movably installed at one end of the barrel. The dustproof mechanism includes a dustproof plate, a rotating rod, a connecting plate, bristles, a plug rod, a connecting seat, a mounting plate, a limit rod and a pressure plate. The dustproof plate at the air inlet of the barrel isolates impurities in the intake air at the outer side of the dustproof plate, and the dustproof plate is easy to rotate, so that the dustproof plate and the bristles brush each other, making the dustproof plate not easy to be blocked.

[0007] The prior art adopts the method of installing a filter at the air inlet to prevent impurities from entering the fog cannon. Some prior art also sets bristles on the outside of the filter. During use, the filter is brushed with the bristles to avoid clogging of the filter after a long period of work, resulting in a reduction in the air intake and affecting the diffusion range of the spray. However, the method of brushing with bristles can only brush the outer surface of the outer filter, so only a single-layer filter can be set. However, in order to ensure the dustproof effect and not affect the air intake as much as possible, multiple layers of filter nets are often required to cooperate. Bristles cannot clean multiple layers of filters. Moreover, if brushing is performed while the fog cannon is working, due to the effect of suction, the impurities brushed by the brush will not leave the filter, but will gather at the contact position between the brush and the filter. Once the accumulation is large enough, the brush will lose its cleaning ability, seriously affecting the efficiency of spray dust reduction.

[0008] In summary, there is an urgent need for a construction dust reduction structure and a dust reduction construction method that can clean the dust prevention structure of the air inlet without being restricted by the dust prevention structure to avoid clogging of the dust prevention structure and affecting the dust reduction range. Summary of the invention

[0009] In view of the dust prevention problem of air inlet in the prior art, a dust reduction structure for construction is proposed which can clean the dust prevention structure of the air inlet without being restricted by the dust prevention structure to avoid clogging of the dust prevention structure and affecting the dust reduction range.

[0010] In order to solve the above problems, the technical solution of the present invention is:

[0011] A dust reduction structure for construction, including an exhaust duct, the exhaust duct including an air inlet channel and an air outlet channel, the air inlet channel is provided with an exhaust fan, the air outlet channel is provided with an atomizing nozzle, the exhaust duct also includes a plurality of recoil channels and a plurality of air inlets, the recoil channels correspond to the air inlets one by one, the air inlets are provided with filters, each recoil channel is provided with a partition plate, the partition plate is used to control the connection between the recoil channel and the corresponding air inlet, and the partition plate is also used to control the connection between the inlet channel and the air inlet; wherein, the air flow in the inlet channel flows toward the air outlet channel and the plurality of recoil channels, at least one group of the air inlets is connected to the inlet channel, and at least one group of the air inlets is connected to the recoil channel; under the obstruction of the partition plate, the air inlet connected to the inlet channel and the recoil channel are in a separated state.

[0012] As a preferred technical solution, two of the recoil channels and two of the air inlets are provided.

[0013] As a preferred technical solution, the partition plates in each of the recoil channels are arranged in parallel, and the partition plates are movably connected to the cylinder wall of the exhaust cylinder via a movable shaft.

[0014] As a preferred technical solution, the angle formed by the planes where the two air inlets are located is an obtuse angle.

[0015] As a preferred technical solution, it also includes an intermittent transmission gear set, and the intermittent transmission gear set controls the periodic rotation of the partition plate.

[0016] As a preferred technical solution, the intermittent transmission gear set includes a reduction gear set, a periodic meshing transmission gear, and a driving rack; the reduction gear set is used to reduce the input rotation speed and drive the periodic meshing transmission gear to rotate, and the periodic meshing transmission gear drives the driving rack to move back and forth periodically.

[0017] As a preferred technical solution, the input end of the reduction gear set is meshed with the rotating shaft of the exhaust fan, and the output end of the driving rack is meshed with the gear at one end of the movable shaft of the partition plate.

[0018] As a preferred technical solution, it also includes a movable base, and the movable base is used to support the exhaust duct.

[0019] As a preferred technical solution, a brush cleaning device is provided on the outer surface of the filter.

[0020] The present invention also proposes a construction dust reduction method that can clean the dust-proof structure of the air inlet without stopping the machine, thereby preventing the dust-proof structure from being blocked and affecting the dust reduction range.

[0021] A dust reduction construction method for construction, cyclically executing the first state and the second state; wherein the first state refers to the first partition plate blocking the first recoil channel corresponding to it, the second partition plate is opened, and the corresponding second recoil channel is connected to the corresponding second air inlet; so that the first air inlet corresponding to the first recoil channel is only connected to the air inlet channel; the second state refers to the first partition plate is opened, the corresponding first recoil channel is connected to the corresponding first air inlet, and the second partition plate blocks the second recoil channel corresponding to it; so that the second air inlet corresponding to the second recoil channel is only connected to the air inlet channel.

[0022] Beneficial effects of the present invention:

[0023] The construction dust reduction structure described in the present invention is provided with a recoil channel, and utilizes the wind force of the exhaust duct itself to recoil clean the filter at the air inlet. Compared with the brush in the prior art that can only clean the surface of the outer layer of the filter, the recoil cleaning can clean the filter from the inside and the outside, and can clean the filter with a multi-layer filter screen to prevent the inner layer of the filter screen from being blocked due to the inability to be cleaned, thereby greatly reducing the air intake volume. The recoil channel and the corresponding air inlet are provided with multiple groups, and can be switched between the air intake and recoil states through a partition plate, so that at least one group of air inlets is in a connected state with the air intake channel for air intake, and at least one group of air inlets is in a connected state with the recoil channel for recoil cleaning of the filter. Each partition plate can switch the air inlet of the cleaned filter to a state connected with the air intake channel for air intake, and can also switch the air inlet previously used for air intake to a state connected with the recoil channel for cleaning. The construction dust reduction structure described in the present invention can not only deeply and fully purify and filter the airflow entering the exhaust duct while the exhaust duct continues to work, but also does not affect the dust reduction range and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of a dust reduction structure for construction according to the present invention;

[0025] Figure 2 It is a cutaway and state schematic diagram of a local structure of a construction dust reduction structure of the present invention;

[0026] Figure 3 This is a schematic diagram of an air inlet of a construction dust reduction structure with a filter according to the present invention;

[0027] Figure 4 This is a schematic diagram of an initial state in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a state switch in an embodiment of the present invention;

[0029] Figure 6 It is a partially enlarged schematic diagram of an intermittent transmission gear set of a construction dust reduction structure of the present invention.

[0030] The reference numerals and components involved in the drawings are as follows:

[0031] 1. Exhaust duct; 2. Air inlet channel; 21. Exhaust fan; 3. Air outlet channel; 31. Atomizing nozzle;

[0032] 4. Air inlet; 41. First air inlet; 42. Second air inlet; 43. Filter;

[0033] 5. recoil channel; 51. first recoil channel; 52. second recoil channel;

[0034] 6. partition plate; 61. first partition plate; 62. second partition plate; 63. rotation axis;

[0035] 7. Mobile base;

[0036] 8. Intermittent transmission gear set; 81. Reduction gear set; 82. Periodic meshing transmission gear; 83. Driving rack; 821. Arc teeth. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all 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.

[0038] In order to better understand the construction dust reduction structure provided by the present embodiment, the existing construction dust reduction structure is first briefly introduced below. The existing construction dust reduction structure usually adopts the form of a flexibly placed fog cannon to reduce dust on the construction site. The fog cannon uses a high-pressure water pump to atomize water into tiny particles, and then the wind pressure generated by the fan or axial flow fog cannon blows the water mist into the air, which comes into contact with the dust particles in the air and causes them to fall due to gravity, thereby achieving the effect of dust reduction. Furthermore, by arranging a filter module on the air intake channel, impurities can be prevented from being sucked into the fog cannon. However, due to the large amount of debris on the construction site, impurities are extremely easy to accumulate on the filter module and clog the air inlet. Therefore, it is conventional to arrange a continuously rotating brush on the surface of the filter module to clean the filter module in real time. However, this cleaning can only scrub the surface, which will limit the structure of the filter module. For multi-layer filters with better filtering effects, impurities entering the inner layer cannot be cleaned, and the brush will aggravate the wear of the bristles because it needs to work continuously, increasing the maintenance work of the brush. At the same time, in order to thoroughly clean the adsorbed impurities, it is also necessary to stop the suction work, which makes the dust reduction equipment unable to work continuously, greatly reducing the dust reduction efficiency.

[0039] Therefore, in order to improve the self-cleaning ability of the dust reduction structure, the present invention provides a construction dust reduction structure, see the attached Figure 1 , Attachment Figure 2 , including an exhaust duct 1, the exhaust duct 1 including an air inlet channel 2 and an air outlet channel 3. In this embodiment, the air inlet channel 2 is a cylindrical channel, the air outlet channel 3 is a conical channel narrowed at the air outlet, two circles of atomizing nozzles 31 are provided at the air outlet, one end of the air inlet channel 2 faces the air inlet 4, and the other end is connected to the air outlet channel 3. An exhaust fan 21 is provided in the air inlet channel 2 for sucking air from the air inlet 4. See the attached Figure 3 A filter 43 is provided at the air inlet 4 for filtering impurities in the air, wherein a part of the air flow is ejected from the air outlet channel 3, and the droplets atomized by the atomizing nozzle 31 are ejected to the dust reduction area for dust reduction. Please refer to the attached Figure 2 In the present invention, two groups of recoil channels 5 and two air inlets 4 are provided on both sides of the air inlet channel 2. The inlets of the two recoil channels 5 are provided at the connection between the air inlet channel 2 and the air outlet channel 3. The outlets of the two recoil channels 5 are respectively opposite to the air inlets 4, and one side of the air inlet 4 is connected to one side of the outlet of the recoil channel 5. Specifically, in the present invention, two groups of air inlets 4 are provided, and each air inlet 4 corresponds to each recoil channel 5, and in this embodiment, the air inlet channel 2 is located between the two air inlets 4, and the end of the air inlet channel 2 is at a certain distance from the air inlet 4, and the space is used for the rotation of the partition plate 6; the partition plate 6 is also provided with two corresponding The rotating shaft 63 of each partition plate 6 is respectively installed at the junction of the end of the air inlet channel 2 and each recoil channel 5. The size of the partition plate 6 is the same as the outlet size of the recoil channel 5, and is used to block the connection between the recoil channel 5 and the air inlet 4. At the same time, the end of the partition plate 6 can also be closed with the other side of the air inlet 4, and is used to isolate the connection between the corresponding air inlet 4 and the air inlet channel 2; preferably, each partition plate 6 can be controlled by a separate motor, and the timing of the rotation of the partition plate 6 is set according to the size of the impurities and the operating speed of the exhaust fan 21. The rotation interval of the partition plate 6 is the air intake or recoil cleaning time of each air inlet 4. Preferably, the filter 43 arranged at the air inlet 4 is composed of a multi-layer dust-proof net, which can intercept as many impurities as possible in the air without affecting the air intake volume. It should be noted that the multi-layer dust-proof net can perform graded filtration to block larger impurities such as feathers in front of the outermost large-aperture dust-proof net, providing multi-layer filtration protection; preferably, the dust-proof net is a pleated structure, which can allow air to enter from the side to prevent large impurities such as plastic bags from directly blocking a large number of air inlets.

[0040] Please see attached Figure 1 In order to facilitate the movement of the exhaust cylinder 1, a mobile base 7 is provided under the exhaust cylinder 1, and a rotating device and a pitching device are provided between the mobile base 7 and the exhaust cylinder 1. The rotating device can drive the exhaust cylinder 1 to rotate to control the direction of the spray, and the pitching device can control the pitching angle of the exhaust cylinder 1. A water pump for supplying water to the atomizing nozzle 31, a power control box and other facilities are provided in the mobile base 7. In some preferred embodiments, water tanks and other equipment are also provided.

[0041] In some preferred embodiments, in order to increase the cleaning efficiency, a brush cleaning device can also be installed on the outside of the air inlet 4. Specifically, the brush is driven by a threaded screw or a telescopic rod to scrape back and forth along the outer surface of the filter 43. Its mechanical structure is the existing technology and will not be described in detail here. The brush is used to blow down impurities on the outer layer of the filter 43, and under the action of the recoil airflow, the accumulation of impurities at the brush is effectively avoided.

[0042] The use of the present invention is as follows: the construction dust reduction structure of the present invention is moved and placed in a corresponding position, so that the air outlet channel 3 of the exhaust duct 1 is aligned with the corresponding dust reduction area. For the convenience of description, please refer to the attached Figure 4 , one of the recoil channels 5 and its corresponding air inlet 4 is called the first recoil channel 51 and the first air inlet 41, and the partition plate 6 connected thereto is called the first partition plate 61; the recoil channel 5 on the other side and the corresponding structure are called the second recoil channel 52, the second air inlet 42, and the second partition plate 62; in the initial state, the first partition plate 61 is in contact with the outlet of the first recoil channel 51, and the second partition plate 62 is closed to the side of the second air inlet 42 close to the first air inlet 41, so that the first recoil channel 51 is isolated from the first air inlet 41 under the action of the first partition plate 61, the air inlet channel 2 is connected to the first air inlet 41, the second recoil channel 52 is connected to the second air inlet 42, and the second air inlet 42 is isolated from the inlet channel 2 under the action of the second partition plate 62. Preferably, at this time, the first partition plate 61 is parallel to the second partition plate 62, and the first air inlet 41 and the second air inlet 42 are arranged at an obtuse angle. ; Under the action of the exhaust fan 21, the air flow passes through the filter 43 of the first air inlet 41 and enters the air inlet channel 2. A split occurs at the end of the air inlet channel 2. A part of the air flows into the air outlet channel 3 to diffuse the droplets sprayed from the atomizing nozzle 31 to the target area where dust reduction is required, and a part of the air flows into the first recoil channel 51 and the second recoil channel 52. Among them, the first recoil channel 51 is blocked by the first partition plate 61, and the air flow in the second recoil channel 52 is blown out from the second air inlet 42 through the filter 43. During operation, impurities in the air gradually accumulate in the filter 43 of the first air inlet 41, reducing the air intake volume. Under the recoil effect, the impurities in the filter 43 of the second air inlet 42 are blown back out of the filter 43. After this state is maintained for a period of time, the filter 43 of the first air inlet 41 deposits the filtered impurities, and the impurities originally deposited in the second air inlet 42 are blown out. At this time, the first partition plate 61 and the second partition plate 62 are rotated. Please refer to the attached Figure 5, so that the first recoil channel 51 is connected to the first air inlet 41, the second recoil channel 52 is separated from the second air inlet 42, and the air inlet channel 2 is connected to the second air inlet 42, completing the switching of the air intake position and the recoil position, so that the first air inlet 41 that originally accumulated impurities enters the recoil cleaning state, and the second air inlet 42 that was originally recoil cleaned enters the air intake filtering state, such as the above cycle, which effectively avoids the environment in the exhaust duct 1 from being corroded, increases the use time of the equipment, and does not need to stop the machine to clean the filter 43, greatly enhancing the ability to work continuously.

[0043] It should be noted that: the construction dust reduction structure of the present invention sets a recoil channel 5, and uses the wind force of the exhaust duct 1 itself to recoil clean the filter 43 at the air inlet 4. Compared with the brush in the prior art that can only clean the surface of the outer layer of the filter 43, the recoil cleaning can clean the filter 43 from the inside and the outside, and can clean the filter 43 with multiple layers of filter screens, so as to avoid the situation that the inner layer of the filter 43 cannot be cleaned and causes blockage, thereby greatly reducing the air intake. In addition, the recoil channel 5 and the corresponding air inlet 4 are provided with multiple groups, and the partition plate 6 can be used to switch between the air intake and recoil states. , so that at least one group of air inlets 4 is connected to the air inlet channel 2 for air intake, and at least one group of air inlet ports 4 is connected to the recoil channel 5 for recoil cleaning of the filter 43. Each partition plate 6 can switch the air inlet 4 of the cleaned filter 43 to a state connected to the air inlet channel 2 for air intake, and can also switch the air inlet 4 previously used for air intake to a state connected to the recoil channel 5 for cleaning. The construction dust reduction structure of the present invention can, while the exhaust duct 1 continues to work, deeply and fully purify and filter the airflow entering the exhaust duct 1 without affecting the dust reduction range and effect.

[0044] Two groups of the recoil channels 5 and the air inlet 4 can meet the requirements of alternating air intake and cleaning. In some other embodiments, three groups of recoil channels 5 and the air inlet 4, partition plates 6, etc. can be arranged around the air inlet channel 2 to meet different air intake requirements. The usage mode can be that one air inlet 4 is used for air intake, and the other two air inlets 4 are in a state of recoil cleaning, so that the recoil cleaning time is longer than the filtering time, ensuring that the recoil cleaning is complete. The partition plates 6 in each of the recoil channels 5 are arranged in parallel, and the partition plates 6 are movably connected to the cylinder wall of the exhaust cylinder 1 through a movable shaft. Only one set of active driving mechanism is required to maintain the parallel partition plates 6 to switch and control the two partition plates 6.

[0045] Example 2

[0046] In order to realize the automatic switching of the state of the partition plate 6, please refer to the attached Figure 3In this embodiment, an intermittent transmission gear set 8 is provided under the exhaust tube 1, and the intermittent transmission gear set 8 can use the rotation power of the exhaust fan 21 itself to realize the timed rotation of the partition plate 6. For details, please refer to the attached Figure 6 The intermittent transmission gear set 8 includes a reduction gear set 81, a periodic meshing transmission gear 82, and a driving rack 83. In the air intake channel 2, a gear rod and other structures are provided to transmit the shaft power of the exhaust fan 21 to the bottom of the exhaust fan 21 and mesh with the input end of the reduction gear set 81. The reduction gear set 81 can reduce the transmission gear speed to increase the rotation interval time of the partition plate 6. The output end of the reduction gear set 81 meshes with the periodic meshing transmission gear 82. The periodic meshing transmission gear 82 includes arcuate teeth 821 that are only partially provided with teeth, and the periodic meshing transmission gear 82 has two groups, which span across both sides of the driving rack 83 respectively. The two groups of periodic meshing transmission gears 82 are also connected by gear transmission, so that the rotation directions are consistent, and the two arcuate teeth 821 thereon are oriented in the same direction. Teeth that can mesh with the arcuate teeth 821 are provided on both sides of the driving rack 83, and both sides of the driving rack 83 are simultaneously meshed with the rotating shaft 63 of the partition plate 6 through gear transmission.

[0047] The usage of this embodiment is as follows: after the exhaust fan 21 rotates, it drives the reduction gear set 81 to rotate. Under the action of the reduction gear set 81, the rotation speed of the periodic meshing transmission gear 82 is significantly reduced compared to that of the exhaust fan 21. When the arc-shaped teeth 821 on one side mesh with the driving rack 83, the driving rack 83 is driven to move, thereby driving the partition plate 6 to rotate, forming a switching of the blocking state. When the arc-shaped teeth 821 rotate away from the driving rack 83, the switching is completed; the periodic meshing transmission gear 82 continues to rotate, and the arc-shaped teeth 821 on this side gradually move away from the driving rack 83, while the arc-shaped teeth 821 on the other side gradually approach the driving rack 83. When the arc-shaped teeth 821 on the other side mesh with the driving rack 83, the driving rack 83 is driven to move in the opposite direction, which can drive the partition plate 6 to rotate in the opposite direction, so that the partition plate 6 is switched to the original state again. At the same time, under the continued rotation of the periodic meshing transmission gear 82, the reciprocating cycle is carried out, thereby realizing the switching of the recoil and the intake state of the air inlet 4.

[0048] It should be noted that: the intermittent transmission gear set 8 can use the power of the exhaust tube 1 itself to drive the partition plate 6 to rotate, and the air inlet channel is located between the two recoil channels 5. The channel formed by the two partition plates 6 has a certain angle with the entrance of the air inlet channel 2, so that the partition plate 6 used to block the recoil channel 5 is directly impacted by the airflow, thereby achieving self-locking, and there is no need to set a locking member to prevent the partition plate 6 from swinging back and forth. When the driving rack 83 cannot move, the other partition plate 6 can also be stably locked; and the other partition plate 6 used to isolate the air inlet channel 2 and the recoil channel 5 is not directly impacted by the airflow, and the airflow flows at high speed beside it, and the gas flow rate on the other side of the partition plate 6 is high, forming a pressure difference, making the isolation effect more stable, and the switching interval and frequency can be affected by setting the gear ratio. At the same time, it is connected to the rotating shaft of the exhaust fan 21, so that the switching frequency can be controlled as the speed of the exhaust fan 21 changes. If the speed is fast, the impurity deposition will also become faster, and the switching will be fast, and vice versa, if the speed is slow, the switching will be slow.

[0049] Example 3

[0050] This embodiment provides a construction dust reduction method, using the construction dust reduction structure to reduce dust:

[0051] Step 1: Execute the first state, wherein the first state refers to: the first partition plate 61 blocks the first recoil channel 51 corresponding thereto, the second partition plate 62 is opened, and the corresponding second recoil channel 52 is communicated with the corresponding second air inlet 42; so that the first air inlet 41 corresponding to the first recoil channel 51 is only communicated with the air inlet channel 2;

[0052] In the first state, one group of air inlets 4 is used for air intake and filtering, and another group of air inlets 4 is used for backflushing and cleaning.

[0053] Step 2: Execute the second state, wherein the first partition plate 61 is opened, the corresponding first recoil channel 51 is connected to the corresponding first air inlet 41, and the second partition plate 62 blocks the corresponding second recoil channel 52, so that the second air inlet 42 corresponding to the second recoil channel 52 is only connected to the air inlet channel 2;

[0054] In the second state, the first air inlet 41 used for air intake in the first state is switched to a recoil air outlet state, and the second air inlet 42 used for air outlet in the first state is switched to an air intake state;

[0055] Step 3: Loop through the first state and the second state.

[0056] It should be noted that the above-mentioned construction dust reduction method can overcome the suction effect during air intake and effectively clean the filter 43 of the air inlet 4 without stopping the machine.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A dust reduction structure for construction, comprising an exhaust duct, the exhaust duct comprising an air inlet channel and an air outlet channel, an exhaust fan is arranged in the air inlet channel, and an atomizing nozzle is arranged in the air outlet channel, characterized in that: The exhaust duct also includes a plurality of recoil channels and a plurality of air inlets, the recoil channels correspond to the air inlets one by one, the air inlets are provided with filters, and each recoil channel is provided with a partition plate, the partition plate is used to control the connection between the recoil channel and the corresponding air inlet, and the partition plate is also used to control the connection between the air inlet channel and the air inlet; wherein, the air flow in the air inlet channel flows to the air outlet channel and the plurality of recoil channels, at least one group of the air inlets is connected to the air inlet channel, and at least one group of the air inlets is connected to the recoil channel; under the obstruction of the partition plate, the air inlet connected to the air inlet channel and the recoil channel are in a separated state.

2. The dust reduction structure for construction according to claim 1, characterized in that: The recoil channel and the air inlet are both provided with two.

3. The dust reduction structure for construction according to claim 2, characterized in that: The partition plates in each of the recoil channels are arranged in parallel, and the partition plates are movably connected to the cylinder wall of the exhaust cylinder through a movable shaft.

4. The dust reduction structure for construction according to claim 3, characterized in that: The angle formed by the planes where the two air inlets are located is an obtuse angle.

5. The dust reduction structure for construction according to claim 4, characterized in that: It also includes an intermittent transmission gear set, and the intermittent transmission gear set controls the periodic rotation of the partition plate.

6. The dust reduction structure for construction according to claim 5, characterized in that: The intermittent transmission gear set includes a reduction gear set, a periodic meshing transmission gear, and a driving rack; the reduction gear set is used to reduce the input rotation speed and drive the periodic meshing transmission gear to rotate, and the periodic meshing transmission gear drives the driving rack to move back and forth periodically.

7. The dust reduction structure for construction according to claim 6, characterized in that: The input end of the reduction gear set is meshed with the rotating shaft of the exhaust fan, and the output end of the driving rack is meshed with the gear at one end of the movable shaft of the partition plate.

8. The dust reduction structure for construction according to claim 1, characterized in that: It also includes a mobile base, which is used to support the exhaust cylinder.

9. The dust reduction structure for construction according to claim 1, characterized in that: The outer surface of the filter is provided with a brush cleaning device.

10. A construction dust reduction method, characterized in that: Use the construction dust reduction structure described in any one of claims 1 to 9 to reduce dust: Execute the first state and the second state cyclically; The first state refers to: the first partition plate blocks the first recoil channel corresponding thereto, the second partition plate is opened, and the corresponding second recoil channel is connected to the corresponding second air inlet; so that the first air inlet corresponding to the first recoil channel is only connected to the air inlet channel; The second state means that: the first partition plate is opened, the corresponding first recoil channel is connected to the corresponding first air inlet, and the second partition plate blocks the corresponding second recoil channel; so that the second air inlet corresponding to the second recoil channel is only connected to the air inlet channel.

Images