A dust suppression device for construction engineering

Abstract

The present invention relates to the field of building construction technology, and proposes a dust reduction device for building engineering construction, which is characterized by comprising: a collection box having an inlet and an outlet; an air extraction body arranged on the collection box, the air extraction body having an air inlet and an air outlet, the air outlet being connected to the inlet; and a dust collection box arranged at the outlet for accommodating dust sucked into the collection box. The above technical solution solves the problem that the spray dust reduction method in the prior art is easy to spray onto people and cause inconvenience.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a dust suppression device for building engineering construction. Background Art

[0002] As people's living standards improve and their environmental awareness increases, the requirements for air quality are getting higher and higher. The large amount of dust generated during construction will seriously pollute the air, affect the quality of life of surrounding residents, and also cause damage to the atmospheric environment. For example, when construction is carried out in the central area of ​​the city, dust may cause the surrounding air quality index to drop and cause weather phenomena such as haze. Therefore, effective dust suppression devices are needed to reduce dust pollution to the air.

[0003] With the continuous development of science and technology, spray technology has made great progress. The emergence of new spray technologies such as high-pressure spray and ultrasonic spray has made the water mist particles smaller and more uniform, with a larger contact area with dust and better adsorption effect, thereby improving the dust reduction efficiency.

[0004] Although spray technology can effectively reduce dust, it is easy to spray water mist onto the road or passers-by, causing inconvenience. In addition, in hot summer, the spray evaporates too quickly, reducing the dust reduction efficiency. Therefore, it is necessary to improve the existing dust reduction method to make up for the shortcomings of spray dust reduction. Summary of the invention

[0005] The present invention provides a dust suppression device for construction engineering, which solves the problem in the related art that the spray dust suppression method is easy to spray onto people and cause inconvenience.

[0006] The technical solution of the present invention is as follows: A dust suppression device for construction engineering, comprising: a collection box having an inlet and an outlet; An air extraction body is arranged on the collection box, and the air extraction body has an air inlet and an air outlet, and the air outlet is connected to the inlet; a dust collecting box, disposed at the outlet, for containing dust sucked into the collecting box; A filter screen is arranged in the air extraction body and located between the air inlet and the air outlet, and the filter screen has a plurality of filter holes; The movable part is lifted and lowered in the air extraction body and is located below the filter screen. The movable part is provided with a plurality of ejectors, one of which is provided below each filter hole. When the movable part moves, the ejectors are inserted into the filter holes.

[0007] As a further technical solution, it also includes: There are several hammer heads, and each of the ejector pins is provided with at least one hammer head, and the hammer head is used to vibrate the filter screen.

[0008] As a further technical solution, it also includes: A baffle, arranged in the air extraction body and located on one side of the moving part; A boss, arranged on the moving part, the boss having a blocking piece; an elastic member, one end of which acts on the baffle plate and the other end of which acts on the baffle sheet, for providing a force for the moving member to move away from the filter screen; A pushing member is movably arranged on the air extraction body, the moving direction of the pushing member is perpendicular to the moving direction of the moving member, and the pushing member has a conical surface, which abuts against the convex column.

[0009] As a further technical solution, the contact point between the protruding column and the conical surface is a spherical surface.

[0010] As a further technical solution, it also includes: The pressing block is arranged on the pushing member and is located outside the air extraction body.

[0011] As a further technical solution, it also includes: A dust collecting hood is arranged in the collecting box and has a dust collecting groove. A dust guiding surface is provided in the middle of the dust collecting groove, and the dust guiding surface is used to collect dust in the dust collecting groove and guide it to the outlet; A fixed column, disposed in the collection box; An air guide plate is movably arranged on the fixed column, the moving direction of the air guide plate is parallel to the moving direction of the pushing member, and the air guide plate has an air guide surface, and the air guide surface is used to guide dust to the dust collecting cover.

[0012] As a further technical solution, it also includes: A sleeve, sleeved on the fixing column; A connecting rod 1, one end of which is arranged on the wind deflector plate, and the other end of which is arranged on the sleeve; A second connecting rod, arranged on the sleeve; A cleaning piece is arranged on the second connecting rod, and the cleaning piece has a plurality of convex parts, and the plurality of convex parts are respectively located in the dust collecting groove, and are used to push dust to the dust guiding surface after moving.

[0013] As a further technical solution, it also includes: A dust scraping member is rotatably arranged on the second connecting rod, the rotation axis of the dust scraping member is parallel to the moving direction of the second connecting rod, and the dust scraping member is used to scrape off the dust located on the dust guiding surface after rotation.

[0014] As a further technical solution, it also includes: There are a plurality of outer wings, which are arranged on the scraper at intervals, and the plurality of outer wings are arranged obliquely; There are several scrapers which are arranged on the dust scraping member at intervals.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, in order to solve the problems in the related art that the spray dust reduction method is easy to spray onto people and cause inconvenience, and the dust reduction efficiency is reduced in summer, the above-mentioned dust reduction device is designed. According to the actual construction situation, you can choose to use only this dust reduction device, or use it together with the spray technology to improve the dust reduction efficiency.

[0016] In actual construction sites, the collection box can be made of solid metal, such as stainless steel, and can be in the shape of a cuboid, with the inlet set at the top or side of the collection box and the outlet at the bottom. A power-adapted fan is set in the exhaust body and is firmly installed at the air inlet of the exhaust body by bolts. The air inlet faces the construction dust source, such as the area where demolition work or earth excavation is in progress, and the air outlet is connected to the collection box inlet through a sealed pipe. The dust box is designed to be detachable, which is convenient for regular removal and dust cleaning. The material can be selected from plastic or thin metal plates.

[0017] The device has a simple and practical structure, and can effectively suck the dust generated during the construction process into the collection box through the exhaust body, and collect it in the dust box, thereby reducing the dust content in the air at the construction site and reducing the harm to the construction environment and the health of construction workers. And no water mist will be sprayed during the whole process, eliminating the inconvenience caused by spraying on the road or people. In summer, it can be used together with the spray dust reduction method to minimize wetting the surrounding road surface and greatly improve the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the main structure of the air extraction in the present invention; Figure 3 This is a schematic diagram of the structure of the collection box from one perspective of the present invention; Figure 4 This is a schematic structural diagram of the collection box in the present invention from another perspective; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle part A; Figure 6 It is a schematic diagram of the ejector structure in the present invention; Figure 7 This is a schematic diagram of the internal structure of the collection box in the present invention; Figure 8 It is a schematic diagram of the structure of the cleaning member in the present invention; In the figure: 1, collecting box, 2, inlet, 3, outlet, 4, exhaust body, 5, air inlet, 6, air outlet, 7, dust box, 8, filter, 9, filter hole, 10, moving part, 11, ejector, 12, hammer head, 13, baffle, 14, convex column, 15, baffle, 16, elastic part, 17, pushing part, 18, conical surface, 19, spherical surface, 20, pressing block, 21, dust hood, 22, dust collecting groove, 23, dust guide surface, 24, fixed column, 25, air guide plate, 26, air guide surface, 27, sleeve, 28, connecting rod one, 29, connecting rod two, 30, cleaning part, 31, convex part, 32, dust scraping part, 33, outer wing, 34, scraper. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] like Figure 1 to Figure 8As shown, a dust reduction device for construction engineering is proposed, including: a collecting box 1 with an inlet 2 and an outlet 3; an exhaust main body 4 is arranged on the collecting box 1, the exhaust main body 4 has an air inlet 5 and an air outlet 6, and the air outlet 6 is connected to the inlet 2; a dust collecting box 7 is arranged at the outlet 3, for accommodating dust sucked into the collecting box 1; a filter 8 is arranged in the exhaust main body 4, between the air inlet 5 and the air outlet 6, and the filter 8 has a plurality of filter holes 9; a moving part 10 is lifted and arranged in the exhaust main body 4, below the filter 8, and a plurality of ejectors 11 are provided on the moving part 10, and there is an ejector 11 below each filter hole 9, and after the moving part 10 moves, the ejector 11 extends into the filter hole 9.

[0025] In this embodiment, in order to solve the problem that the spray dust reduction method in the related art is easy to spray onto people and cause inconvenience, and the dust reduction efficiency is reduced in summer, the above-mentioned dust reduction device is designed. According to the actual construction situation, you can choose to use only this dust reduction device, or use it together with the spray technology to improve the dust reduction efficiency.

[0026] In actual construction sites, the collection box 1 can be made of solid metal material, such as stainless steel, and its shape can be a rectangular parallelepiped, with the inlet 2 set at the top or side of the collection box 1, and the outlet 3 at the bottom. A power-adapted fan is set in the exhaust body 4, and is firmly installed at the air inlet 5 of the exhaust body 4 by bolts. The air inlet 5 faces the construction dust source, such as the area where demolition work or earth excavation is being carried out, and the air outlet 6 is connected to the inlet 2 of the collection box 1 through a sealed pipe. The dust box 7 is designed to be detachable, which is convenient for regular removal and dust cleaning. The material can be selected from plastic or thin metal plates.

[0027] The device has a simple and practical structure, and can effectively suck the dust generated during the construction process into the collection box 1 through the exhaust body 4, and collect it in the dust box 7, thereby reducing the dust content in the air at the construction site and reducing the harm to the construction environment and the health of construction workers. In addition, no water mist will be sprayed during the whole process, which prevents the inconvenience caused by spraying on the road or people. In summer, it can be used together with the spray dust reduction method to minimize wetting the surrounding road surface and greatly improve the dust removal efficiency.

[0028] The filter 8 can be made of a fine metal wire mesh, and its frame is fixed inside the air extraction body 4, between the air inlet 5 and the air outlet 6, to prevent some garbage such as plastic bags from entering the collection box 1 and causing blockage. The moving part 10 is a metal plate that can slide in the vertical direction, and the ejector pin 11 is vertically welded on the moving part 10, corresponding to the filter holes 9 on the filter 8 one by one.

[0029] The filter 8 can filter the inhaled air preliminarily and intercept garbage such as plastic bags. The design of the moving part 10 and the ejector pin 11 allows the moving part 10 to be moved to allow the ejector pin 11 to extend into the filter hole 9 after the device has been running for a period of time, so as to eject the dust blocked in the filter hole 9, restore the filtering performance of the filter 8, and ensure that the exhaust body 4 continues to work efficiently.

[0030] For example, at a large construction site, the dust suppression device for construction engineering is installed near the construction area. The collecting box 1 is fixed to the ground by a sturdy bracket, and the inlet 2 and the outlet 3 are tightly connected to the exhaust body 4 and the dust box 7 respectively to ensure that there is no gas leakage. The exhaust body 4 is firmly mounted on the collecting box 1, and the air inlet 5 faces the direction of dust generation. The filter screen 8 inside is made of high-efficiency filtering material, and the filter holes 9 are evenly distributed and of moderate size to effectively block dust particles. The moving part 10 is connected to the inside of the exhaust body 4 by an electric push rod or a hydraulic device, and can achieve precise reciprocating movement under the control of the controller. The ejector pin 11 is made of wear-resistant and hard material, and its length and diameter match the filter hole 9.

[0031] When the device starts working, the exhaust body 4 starts, generating a strong suction force to suck in the dust-containing air from the air inlet 5. When the air passes through the filter 8, larger dust particles are intercepted on the surface of the filter 8, while smaller dust enters the collection box 1 with the air flow. After a period of time, a lot of dust accumulates on the filter 8, affecting the air extraction efficiency. At this time, the controller starts the moving part 10 to move it toward the filter 8, and the ejector pin 11 extends into the filter hole 9 to push out the dust blocked in the filter hole 9 and make it fall to the bottom of the collection box 1. After being cleaned, the filter 8 restores a good filtering effect, and the exhaust body 4 continues to work efficiently. The dust box 7 is connected to the outlet 3 of the collection box 1 by snaps or threads. When the dust box 7 is full of dust, it can be easily disassembled for cleaning and replacement.

[0032] Through the powerful suction force of the exhaust body 4, the air containing dust is sucked into the collection box 1, and then filtered by the filter 8 to effectively remove the dust in the air, greatly reducing the dust pollution at the construction site and improving the air quality. The setting of the moving part 10 and the ejector pin 11 can automatically clean the filter holes 9 blocked by the filter 8, ensuring the filtering efficiency of the filter 8, so that the dust reduction device can work continuously and stably, without frequent manual cleaning of the filter 8, saving manpower and time costs. It overcomes the shortcomings of spray dust reduction technology that evaporates too quickly in summer and is easy to spray on the road surface and passers-by, and is suitable for various construction environments and climatic conditions. It reduces the damage of construction dust to the surrounding atmospheric environment, reduces the impact on the quality of life of surrounding residents, and helps to achieve green construction and sustainable development. : The dust collection box 7 is detachable, which is convenient for cleaning the collected dust. The entire device has a simple structure and is easy to maintain, which reduces the cost of use and maintenance.

[0033] Furthermore, it also includes: there are a plurality of hammer heads 12 , each ejector pin 11 is provided with at least one hammer head 12 , and the hammer head 12 is used to vibrate the filter screen 8 .

[0034] In this embodiment, the hammer head 12 is made of rubber material to reduce damage to the filter screen 8, and is fixed to each ejector pin 11 by sleeve connection or bonding. When the moving member 10 drives the ejector pin 11 to move, the hammer head 12 moves with the ejector pin 11. When the ejector pin 11 extends into the filter hole 9, the hammer head 12 continuously strikes the filter screen 8 to generate vibration.

[0035] For example, a hammer head 12 is provided at the top of each ejector pin 11, and when the ejector pin 11 is inserted into the filter hole 9, the hammer head 12 quickly hits the lower surface of the filter screen 8. The vibration generated by the impact is quickly transmitted to the entire filter screen 8, making it easier for dust adhering to the surface of the filter screen 8 and the filter hole 9 to fall off.

[0036] The setting of the hammer head 12 can make the stubborn dust adhering to the surface of the filter 8 and the filter holes 9 fall off more easily by vibrating the filter 8, which greatly improves the cleanliness of the filter 8, thereby ensuring the continuous and efficient operation of the dust reduction device. Timely and effective dust cleaning ensures that the filter holes 9 of the filter 8 are always unobstructed, reduces air flow resistance, improves the air suction efficiency of the exhaust body 4, and further enhances the dust reduction effect of the entire dust reduction device. Since the filter 8 can be cleaned more thoroughly, the wear and corrosion of the filter 8 by dust is reduced, the service life of the filter 8 is extended, and the maintenance cost of the equipment is reduced. By removing dust from the filter 8 through vibration, the probability of equipment failure caused by clogging of the filter 8 is reduced, so that the dust reduction device can maintain stable and reliable working performance during a long period of construction.

[0037] Furthermore, it also includes: a baffle 13 is arranged in the air extraction body 4, located on one side of the moving member 10; a boss 14 is arranged on the moving member 10, and the boss 14 has a baffle 15; one end of the elastic member 16 acts on the baffle 13, and the other end acts on the baffle 15, which is used to provide a force for the moving member 10 to move away from the filter 8; a pushing member 17 is movably arranged on the air extraction body 4, and the moving direction of the pushing member 17 is perpendicular to the moving direction of the moving member 10, and the pushing member 17 has a conical surface 18, which abuts against the boss 14.

[0038] In this embodiment, the elastic member 16 provides a restoring force to keep the moving member 10 away from the filter 8. When the push member 17 is not in motion, the moving member 10 is kept at a certain distance from the filter 8 under the action of the elastic member 16. When the filter 8 needs to be cleaned, the push member 17 is moved, and its conical surface 18 pushes the protrusion 14, compressing the elastic member 16, so that the moving member 10 is close to the filter 8, and the ejector pin 11 extends into the filter hole 9 to clean the dust. This structural design makes the movement control of the moving member 10 more accurate and convenient, while ensuring the stability of the cleaning action.

[0039] For example, when the filter screen 8 needs to be cleaned, the pusher 17 starts to move. The moving direction of the pusher 17 is perpendicular to the moving direction of the moving member 10. As the pusher 17 moves, the conical surface 18 it has gradually abuts against the boss 14. Due to the action of the conical surface 18, the boss 14 is subjected to a vertical upward component force, which overcomes the elastic force of the elastic member 16 and pushes the moving member 10 to move upward. The pusher 17 is moved by an electric drive device or a hydraulic device. When the pusher 17 moves to the left, the conical surface 18 squeezes the boss 14, causing the moving member 10 to move upward, the ejector pin 11 extends into the filter hole 9, and the hammer head 12 vibrates the filter screen 8 to clean the dust. After the dust cleaning is completed, the pusher 17 moves to the right, the abutment force between the conical surface 18 and the boss 14 disappears, and under the action of the elastic member 16, the moving member 10 quickly resets and returns to its initial position.

[0040] Furthermore, the contact point between the protruding column 14 and the conical surface 18 is a spherical surface 19 .

[0041] In this embodiment, the portion where the baffle 15 of the boss 14 contacts the conical surface 18 of the pusher 17 is machined into a spherical surface 19. In this way, during the movement of the pusher 17, the boss 14 and the conical surface 18 always maintain good contact, and can better adapt to the angle change of the conical surface 18 of the pusher 17. The design of the contact of the spherical surface 19 reduces the friction between the boss 14 and the conical surface 18, so that the pusher 17 pushes the boss 14 more smoothly, reduces energy loss, and also avoids component wear caused by local stress concentration, thereby extending the service life of related components.

[0042] Furthermore, it also includes: a pressing block 20 is arranged on the pushing member 17 and is located outside the air extraction body 4.

[0043] In this embodiment, the pressing block 20 is made of rubber or plastic and is fixed to the end of the pusher 17 located outside the air extraction body 4 by bolts or buckles. The shape of the pressing block 20 can be designed to be easy for a human hand to hold and press, such as a rectangle with a certain curvature. The pressing block 20 provides a convenient operating component for the operator. Without the aid of other tools, the pushing member 17 can be driven to move directly by manual pressing, thereby controlling the moving member 10 to clean the filter 8, making the operation of the device simpler and more convenient, and improving the ease of use of the device.

[0044] Furthermore, it also includes: a dust hood 21 is arranged in the collection box 1, the dust hood 21 has a plurality of dust collecting grooves 22, and the middle position of the dust collecting groove 22 has a dust guiding surface 23, the dust guiding surface 23 is used to collect dust in the dust collecting groove 22 and guide it to the outlet 3; a fixed column 24 is arranged in the collection box 1; an air guide plate 25 is movably arranged on the fixed column 24, the moving direction of the air guide plate 25 is parallel to the moving direction of the pushing member 17, and the air guide plate 25 has an air guide surface 26, and the air guide surface 26 is used to guide dust to the dust hood 21.

[0045] In this embodiment, the dust collecting groove 22 and the dust guiding surface 23 of the dust collecting cover 21 are designed to guide the collected dust to the outlet 3 for easy collection. The air guide plate 25 can guide the flow direction of the dust so that it enters the dust collecting cover 21 more accurately, thereby improving the efficiency of dust collection and reducing the dust residue in the collection box 1.

[0046] Furthermore, it also includes: a sleeve 27 is sleeved on the fixed column 24; one end of the connecting rod 28 is arranged on the air guide plate 25, and the other end is arranged on the sleeve 27; the connecting rod 29 is arranged on the sleeve 27; the cleaning piece 30 is arranged on the connecting rod 29, and the cleaning piece 30 has a plurality of protrusions 31, and the plurality of protrusions 31 are respectively located in a plurality of dust collecting grooves 22, and are used to push dust to the dust guide surface 23 after moving.

[0047] In this embodiment, the sleeve 27 is sleeved on the fixed column 24 and can slide along the fixed column 24. A spring is connected to one side of the sleeve 27. The spring is arranged on the inner wall of the collection box 1 and is used for resetting the sleeve 27 after it moves. One end of the connecting rod 1 28 is fixed to the air guide plate 25 by bolts, and the other end is welded to the sleeve 27. The connecting rod 29 is vertically welded to the sleeve 27. The cleaning piece 30 is a plastic plate with a plurality of protrusions 31, which is installed on the connecting rod 29 by bolts. The position of the protrusion 31 corresponds to the dust collecting groove 22. Since the wind force is not continuous but dynamically changing, the air guide plate 25 will move back and forth continuously under the influence of the wind force, thereby driving the sleeve 27, the connecting rod 1 28 and the connecting rod 29 to move, and the protrusion 31 of the cleaning piece 30 moves in the dust collecting groove 22.

[0048] The convex portion 31 of the cleaning piece 30 can push the dust scattered in the dust collecting groove 22 to the dust guiding surface 23 during the movement, further improving the efficiency of dust collection, ensuring that the dust in the dust collecting groove 22 can be timely and effectively guided to the outlet 3, and avoiding dust accumulation in the dust collecting groove 22.

[0049] Furthermore, it also includes: a dust scraper 32 is rotatably arranged on the second connecting rod 29, the rotation axis of the dust scraper 32 is parallel to the moving direction of the second connecting rod 29, and the dust scraper 32 is used to scrape off the dust located on the dust guide surface 23 after rotation.

[0050] In this embodiment, the scraper 32 is a cylindrical roller, which is rotatably arranged on the connecting rod 29 through a bearing, and its rotation axis is parallel to the moving direction of the connecting rod 29. The surface of the scraper 32 can be provided with soft bristles with a certain friction force. When the connecting rod 29 moves, the scraper 32 rolls on the dust guide surface 23 of the dust collecting groove 22, and the bristles scrape off the dust on the dust guide surface 23. The scraper 32 can further clean the dust on the dust guide surface 23, ensure the cleanliness of the dust guide surface 23, and enable the dust to be smoothly guided to the outlet 3 through the dust guide surface 23, so as to prevent the dust from accumulating on the dust guide surface 23 and affecting the dust guide effect, thereby improving the dust collection efficiency of the entire dust reduction device.

[0051] Furthermore, it also includes: a plurality of outer wings 33 arranged at intervals on the dust scraping member 32, and the plurality of outer wings 33 are all arranged obliquely; and a plurality of scrapers 34 are arranged at intervals on the dust scraping member 32.

[0052] In this embodiment, the outer wings 33 are used to receive wind force and assist in driving the scraper 32 to rotate; the scraper 34 can replace the bristles for cleaning.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A dust suppression device for construction engineering, characterized in that: include: A collecting box (1) having an inlet (2) and an outlet (3); An air extraction body (4) is arranged on the collection box (1), the air extraction body (4) having an air inlet (5) and an air outlet (6), the air outlet (6) being in communication with the inlet (2); A dust collecting box (7), arranged at the outlet (3) and used for accommodating dust sucked into the collecting box (1); A filter screen (8) is arranged in the air extraction body (4) and is located between the air inlet (5) and the air outlet (6); the filter screen (8) has a plurality of filter holes (9); A movable member (10) is arranged in a lifting manner in the air extraction body (4) and is located below the filter screen (8). The movable member (10) has a plurality of ejector pins (11), and each of the filter holes (9) has one ejector pin (11). When the movable member (10) moves, the ejector pins (11) extend into the filter holes (9).

2. A dust suppression device for construction engineering according to claim 1, characterized in that: Also includes: There are a plurality of hammer heads (12), and each of the ejector pins (11) is provided with at least one hammer head (12), and the hammer head (12) is used to vibrate the filter screen (8).

3. A dust suppression device for construction engineering according to claim 1, characterized in that: Also includes: A baffle (13) is arranged in the air extraction body (4) and is located on one side of the moving part (10); A convex column (14) is arranged on the moving member (10), and the convex column (14) has a blocking piece (15); an elastic member (16), one end of which acts on the baffle (13) and the other end of which acts on the baffle (15), and is used to provide a force for moving the moving member (10) away from the filter screen (8); A pushing member (17) is movably arranged on the air extraction body (4); the moving direction of the pushing member (17) is perpendicular to the moving direction of the moving member (10); the pushing member (17) has a conical surface (18), and the conical surface (18) abuts against the convex column (14).

4. A dust suppression device for construction engineering according to claim 3, characterized in that: The point where the convex column (14) and the conical surface (18) abut against each other is a spherical surface (19).

5. A dust suppression device for construction engineering according to claim 3, characterized in that: Also includes: The pressing block (20) is arranged on the pushing member (17) and is located outside the air extraction body (4).

6. A dust suppression device for construction engineering according to claim 3, characterized in that: Also includes: A dust collecting cover (21) is arranged in the collection box (1) and has a plurality of dust collecting grooves (22). The middle position of the dust collecting groove (22) has a dust guiding surface (23), and the dust guiding surface (23) is used to collect dust in the dust collecting groove (22) and guide it to the outlet (3); A fixed column (24) disposed in the collection box (1); An air guide plate (25) is movably arranged on the fixing column (24); the moving direction of the air guide plate (25) is parallel to the moving direction of the pushing member (17); the air guide plate (25) has an air guide surface (26); and the air guide surface (26) is used to guide dust to the dust collecting cover (21).

7. A dust suppression device for construction engineering according to claim 6, characterized in that: Also includes: A sleeve (27) sleeved on the fixing column (24); A connecting rod (28), one end of which is arranged on the air guide plate (25) and the other end of which is arranged on the sleeve (27); A second connecting rod (29) is arranged on the sleeve (27); A cleaning piece (30) is arranged on the second connecting rod (29), and the cleaning piece (30) has a plurality of protrusions (31). The plurality of protrusions (31) are respectively located in a plurality of dust collecting grooves (22) and are used to push dust toward the dust guiding surface (23) after moving.

8. A dust suppression device for construction engineering according to claim 7, characterized in that: Also includes: A dust scraping member (32) is rotatably disposed on the second connecting rod (29), the rotation axis of the dust scraping member (32) being parallel to the moving direction of the second connecting rod (29), and the dust scraping member (32) is used to scrape away dust located on the dust guiding surface (23) after rotation.

9. A dust suppression device for construction engineering according to claim 8, characterized in that: Also includes: There are a plurality of outer wings (33) which are arranged at intervals on the dust scraping member (32), and the plurality of outer wings (33) are all arranged obliquely; There are a plurality of scrapers (34) which are arranged at intervals on the dust scraping member (32) and are used to scrape away dust located on the dust guiding surface (23).

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