Dust filtering device for construction engineering

Abstract

The invention relates to the technical field of environmental engineering, and discloses a dust filtering device for construction engineering, the dust filtering device comprises a base, the bottom of the base is fixedly connected with a supporting block, a water tank and a collecting tank, the left side of the water tank is fixedly connected with a water pipe, and the output end of the water pipe is fixedly connected with an air inlet filtering mechanism; the right side of the air inlet filtering mechanism is fixedly connected with a filtering box, the top of the filtering box is fixedly connected with a rotary positioning mechanism, the right side of the filtering box is fixedly connected with a rotary dust remover, the outer surface of the rotary positioning mechanism is fixedly connected with a filter screen cleaning mechanism, and the top of the water tank is fixedly connected with a first filtering groove. The top of the supporting block is fixedly connected with a second filtering groove, primary filtering is immediately carried out after air inlet, damage of large particles to a follow-up filter screen is reduced, dust is sprayed through a nozzle, direct impact of the dust to an impeller is reduced, and dust cleaning is simpler and rapider through overall inclined placement.

Description

Technical Field

[0001] The invention relates to the technical field of environmental engineering, in particular to a dust filtering device for construction engineering. Background Art

[0002] In the field of construction engineering, various construction operations such as excavation, drilling, cutting, mixing, etc. will generate a lot of dust. These dusts not only pose a serious threat to the health of construction workers, and long-term exposure to dust environments may cause health problems such as respiratory diseases, but also pollute the surrounding environment, affecting air quality and ecological environment. Traditional dust treatment methods often have limited effects. With the continuous improvement of environmental protection requirements and people's increasing attention to health, the demand for dust filtration devices for construction projects has become more and more urgent.

[0003] There are problems with existing dust filtration devices used in construction projects. A single filtration method is difficult to effectively remove dust particles of different sizes and properties. Larger dust particles may clog the filter, reducing filtration efficiency; while smaller particles may penetrate the filter and cannot be fully filtered, thus affecting air quality and construction environment. As the filtration process proceeds, dust will gradually accumulate on the filter, clogging the filter pores, increasing airflow resistance, and causing a decrease in filtration efficiency. This will not only affect the air quality of the construction environment, but may also increase the energy consumption of the ventilation system. Dust that is not cleaned in time will cause continuous pressure and wear on the filter, shortening the service life of the filter. Summary of the invention

[0004] The object of the present invention is to provide a dust filtering device for construction engineering to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dust filtering device for construction engineering, comprising a base, a support block, a water tank and a collection tank are fixedly connected to the bottom of the base, a water pipe is fixedly connected to the left side of the water tank, an air inlet filter mechanism is fixedly connected to the output end of the water pipe, a filter box is fixedly connected to the right side of the air inlet filter mechanism, a rotating positioning mechanism is fixedly connected to the top of the filter box, a rotating dust collector is fixedly connected to the right side of the filter box, a filter screen cleaning mechanism is fixedly connected to the outer surface of the rotating positioning mechanism, a first filter tank is fixedly connected to the top of the water tank, a second filter tank is fixedly connected to the top of the support block, and further comprising: An air inlet filter mechanism, wherein the bottom of the air inlet filter mechanism is fixedly connected to the top of the second filter slot, the air inlet filter mechanism comprises an air inlet box, the air inlet box is fixedly connected to the top of the second filter slot, the interior of the air inlet box is fixedly connected with an annular column, the interior of the air inlet box is rotatably connected with a baffle via a slot, the outer surface of the air inlet box is fixedly connected with a first motor via a through hole, the output end of the first motor is fixedly connected with an impeller, and the outer surface of the impeller is fixedly connected with an annular connecting block.

[0006] According to the above technical solution, the air inlet filtering mechanism also includes a first filter screen, the inner wall of the first filter screen is fixedly connected to the annular connecting block, the bottom of the first filter screen is fixedly connected to a first clamping block, a first clamping groove is provided inside the air inlet box, the first clamping groove is clamped with the first clamping block, the outer surface of the air inlet box is fixedly connected to an air inlet, the bottom of the air inlet box is fixedly connected to a rotating shaft through a clamping groove and the outer surface of the rotating shaft is rotatably connected to a first valve and a second valve, and the top of the air inlet box is fixedly connected to a nozzle through a through hole.

[0007] According to the above technical solution, the rotation positioning mechanism includes a second filter screen, the outer surface of the second filter screen is fixedly connected to a flexible accordion cover, the outer surface of the flexible accordion cover is fixedly connected to the inner wall of the filter box, the interior of the filter box is rotatably connected to the second filter screen by opening a circular hole, the top of the filter box is fixedly connected to a top plate, the top of the second filter screen is fixedly connected to a nail-shaped column, the outer surface of the nail-shaped column is fixedly connected to a ratchet, the top of the top plate is fixedly connected to a second motor, the output end of the second motor is fixedly connected to a cam, the top of the top plate is clamped with a push block through a slot, the left side of the push block is fixedly connected to a first spring, the left side of the first spring is fixedly connected to a stop block, the stop block is fixedly connected to the top plate, the top of the top plate is fixedly connected to a first torsion spring and a second torsion spring, the top of the first torsion spring is fixedly connected to a first claw, and the top of the second torsion spring is fixedly connected to a second claw.

[0008] According to the above technical scheme, the filter cleaning mechanism includes a first connecting block, the inner surface of the first connecting block is fixedly connected to the rotating shaft part of the second filter screen, the third motor is fixedly connected to the central axis of the first connecting block, the output end of the third motor is fixedly connected to the special-shaped connecting block, the left and right ends of the special-shaped connecting block are fixedly connected to rectangular columns, the inner surface of the rectangular column is fixedly connected to a lead screw, the outer surface of the lead screw is threadedly connected to a slider, the bottom of the slider is fixedly connected to a first butterfly spring, the bottom plate of the first butterfly spring is fixedly connected to a scraper, the bottom of the special-shaped connecting block is fixedly connected to a second butterfly spring, the second butterfly spring is fixedly connected to an I-shaped card block, the bottom of the I-shaped card block is fixedly connected to bristles, the bottom plate of the filter box is fixedly connected to a guide plate by opening a through hole, the bottom of the filter box is fixedly connected to a connecting groove, and the bottom of the connecting groove is fixedly connected to the first filter groove.

[0009] According to the above technical solution, the bottom and top of the first filter are fixedly connected with a first clamping block, and are both clamped with a symmetrically arranged first clamping groove. The diameter of the air inlet is the same as the diameter of the impeller, and the outer surfaces of the first valve and the second valve are in contact with the inner surface of the second filter groove.

[0010] According to the above technical solution, the second filter screen is fixedly connected to the nail-shaped column through the through hole opened between the filter box and the top plate, the bottom of the first claw and the second claw are rotatably connected to the top plate through the circular column, the left side of the push block is in contact with the outer surface of the ratchet, and the top of the top plate is fixedly connected with a component of a rotation positioning mechanism wrapped in a box, and three groups of the rotation positioning mechanism are arranged inside the filter box.

[0011] According to the above technical solution, the second butterfly spring, I-shaped clamp block and bristles are arranged on the left and right sides of the special-shaped connecting block, and the outer surfaces of the three sets of symmetrically arranged rotation positioning mechanisms are all provided with filter cleaning mechanisms.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This type of dust filtering device for construction projects, by setting up an air intake filtering mechanism, realizes primary filtration immediately after the air enters, reduces the damage of larger particles to subsequent filters, sprays the dust that directly enters through a nozzle, reduces the direct impact of dust on the impeller, and makes dust cleaning simpler and faster by tilting the entire device.

[0013] 2. This type of dust filtration device for construction projects can adjust the filter screen angle to meet different dust filtration requirements by setting a rotating positioning mechanism, and achieve multi-stage filtration through symmetrically arranged filters, effectively improving dust filtration accuracy. Symmetrically arranged filters can also balance airflow pressure and improve the stability of the filtration system.

[0014] 3. This type of dust filtering device for construction projects, by setting up a filter cleaning mechanism, achieves a high degree of synchronization between the rotation of the filter cleaning mechanism and the rotation of the filter, achieves the best cleaning effect, can continuously maintain high-efficiency filtering performance, extends the service life of the filter, reduces the frequency and cost of replacing the filter, and provides a clean and safe working environment for the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 It is a cross-sectional view of the main structure of the present invention.

[0017] Figure 3 It is a structural cross-sectional view of the air inlet filtering mechanism of the present invention.

[0018] Figure 4 It is a partial cross-sectional view of the structure of the air inlet filtering mechanism of the present invention.

[0019] Figure 5 It is a structural schematic diagram of the rotary positioning mechanism of the present invention.

[0020] Figure 6 It is an enlarged schematic diagram of the structure of the rotary positioning mechanism A of the present invention.

[0021] Figure 7 It is a structural cross-sectional view of the filter cleaning mechanism of the present invention.

[0022] Figure 8 It is an enlarged schematic diagram of the structure of the filter cleaning mechanism B of the present invention.

[0023] Fig. 9 It is an enlarged schematic diagram of the structure of the filter cleaning mechanism C of the present invention.

[0024] In the figure: 1. base; 2. support block; 3. Air inlet filtering mechanism; 301, air inlet box; 302, annular column; 303, baffle; 304, first motor; 305, impeller; 306, annular connecting block; 307, first filter screen; 308, first clamping block; 309, first clamping slot; 310, air inlet; 311, first flap; 312, second flap; 313, nozzle; 4. Filter box; 5. Rotary dust collector; 6. Rotation positioning mechanism; 601, second filter screen; 602, flexible accordion cover; 603, top plate; 604, nail-shaped column; 605, ratchet; 606, second motor; 607, cam; 608, push block; 609, first spring; 610, stopper; 611, first torsion spring; 612, first claw; 613, second torsion spring; 614, second claw; 7. Collection tank; 8. Water pipe; 9. Filter cleaning mechanism; 901, first connecting block; 902, third motor; 903, guide plate; 904, connecting groove; 905, special-shaped connecting block; 906, rectangular column; 907, lead screw; 908, slider; 909, first butterfly spring; 910, scraper; 911, second butterfly spring; 912, I-shaped card block; 913, bristles; 10. Water tank; 11. First filter tank; 12. Second filter tank. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example 1: See Figure 1-Figure 4The present invention provides a technical solution: a dust filtering device for construction engineering, comprising a base 1, a support block 2, a water tank 10 and a collection tank 7 are fixedly connected to the bottom of the base 1, a water pipe 8 is fixedly connected to the left side of the water tank 10, an air inlet filter mechanism 3 is fixedly connected to the output end of the water pipe 8, a filter box 4 is fixedly connected to the right side of the air inlet filter mechanism 3, a rotating positioning mechanism 6 is fixedly connected to the top of the filter box 4, a rotating dust collector 5 is fixedly connected to the right side of the filter box 4, a filter screen cleaning mechanism 9 is fixedly connected to the outer surface of the rotating positioning mechanism 6, a first filter tank 11 is fixedly connected to the top of the water tank 10, a second filter tank 12 is fixedly connected to the top of the support block 2, and further comprising: The air inlet filter mechanism 3 has its bottom fixedly connected to the top of the second filter slot 12, and the air inlet filter mechanism 3 includes an air inlet box 301, which is fixedly connected to the top of the second filter slot 12, and the interior of the air inlet box 301 is fixedly connected with an annular column 302, and the interior of the air inlet box 301 is rotatably connected with a baffle 303 via a slot, and the outer surface of the air inlet box 301 is fixedly connected with a first motor 304 via a through hole, and the output end of the first motor 304 is fixedly connected with an impeller 305, and the outer surface of the impeller 305 is fixedly connected with an annular connecting block 306.

[0029] The air inlet filter mechanism 3 also includes a first filter screen 307, the inner wall of the first filter screen 307 is fixedly connected to the annular connecting block 306, the bottom of the first filter screen 307 is fixedly connected to a first clamping block 308, a first clamping groove 309 is provided inside the air inlet box 301, the first clamping groove 309 is clamped with the first clamping block 308, the outer surface of the air inlet box 301 is fixedly connected to an air inlet 310, the bottom of the air inlet box 301 is fixedly connected to a rotating shaft through a clamping groove, and the outer surface of the rotating shaft is rotatably connected to a first valve 311 and a second valve 312, and the top of the air inlet box 301 is fixedly connected to a nozzle 313 through a through hole; The bottom and top of the first filter screen 307 are fixedly connected with the first clamping block 308, and are both clamped with the symmetrically arranged first clamping groove 309. The diameter of the air inlet 310 is the same as the diameter of the impeller 305. The outer surfaces of the first valve 311 and the second valve 312 are in contact with the inner surface of the second filter groove 12. By setting the air intake filter mechanism 3, primary filtration is achieved immediately after the air enters, reducing the damage of larger particles to the subsequent filter screen. The dust that directly enters is sprayed through the nozzle 313, which reduces the direct impact of the dust on the impeller 305. The dust cleaning is simpler and faster by placing the first filter screen 307 as a whole in an inclined manner and being rotatable.

[0030] The working principle of this embodiment is as follows: when the dust filtering device for construction engineering is used, the first motor 304 starts to rotate, driving the impeller 305 to rotate, and the dust enters the air inlet box 301 through the air inlet 310. The impeller 305 drives the first filter 307 to rotate through the annular connecting block 306. The first filter 307 rotates around the first card slot 309 through the first card block 308. At this time, the dust is filtered through the first filter 307, and the water source in the water tank 10 enters the nozzle 313 through the water pump and the water pipe 8, so that the dust is atomized and settled, so that larger particles of dust fall to the bottom of the air inlet box 301. The baffle 303 is driven to rotate inside the air inlet box 301 by the dust, and the dust enters the rotary dust collector 5 for dust removal and discharge, and is collected by the collecting trough 7, while the annular column 302 and the baffle 303 limit the unidirectional movement of the dust. When it is necessary to clean the dust particles at the bottom of the air inlet box 301, the wind speed is reduced or the rotation of the first motor 304 is stopped. At this time, the first valve 311 and the second valve 312 are no longer tightly attracted, and the dust enters the second filter tank 12 through the gap and is collected.

[0031] Example 2: Please refer to Figure 5-Figure 6 On the basis of the first embodiment, the present invention provides a technical solution: the rotation positioning mechanism 6 includes a second filter screen 601, the outer surface of the second filter screen 601 is fixedly connected with a flexible accordion cover 602, the outer surface of the flexible accordion cover 602 is fixedly connected to the inner wall of the filter box 4, the interior of the filter box 4 is rotatably connected to the second filter screen 601 by opening a circular hole, the top of the filter box 4 is fixedly connected with a top plate 603, the top of the second filter screen 601 is fixedly connected with a nail-shaped column 604, the outer surface of the nail-shaped column 604 is fixedly connected with a ratchet 605, the top of the top plate 603 is fixedly connected to the second filter screen 601, and the outer surface of the nail-shaped column 604 is fixedly connected to the ratchet 605. A second motor 606 is fixedly connected, a cam 607 is fixedly connected to the output end of the second motor 606, a push block 608 is clamped on the top of the top plate 603 through a slot, a first spring 609 is fixedly connected to the left side of the push block 608, a stopper 610 is fixedly connected to the left side of the first spring 609, the stopper 610 is fixedly connected to the top plate 603, a first torsion spring 611 and a second torsion spring 613 are fixedly connected to the top of the top plate 603, a first claw 612 is fixedly connected to the top of the first torsion spring 611, and a second claw 614 is fixedly connected to the top of the second torsion spring 613; The second filter screen 601 is fixedly connected to the nail-shaped column 604 through the through hole opened between the filter box 4 and the top plate 603. The bottom of the first claw 612 and the second claw 614 are rotatably connected to the top plate 603 through the circular column. The left side of the push block 608 is in contact with the outer surface of the ratchet 605. The top of the top plate 603 is fixedly connected with the components of the box body wrapped in the rotation positioning mechanism 6. The rotation positioning mechanism 6 is provided with three groups inside the filter box 4. By setting the rotation positioning mechanism 6, the angle of the filter screen can be adjusted to meet different dust filtering requirements through the ratchet 605, the second motor 606, the push block 608 and the cam 607. The symmetrically arranged filter screens can achieve multi-stage filtration and effectively improve the dust filtering accuracy. The symmetrically arranged filter screens can also balance the airflow pressure and improve the stability of the filtration system.

[0032] The working principle of this embodiment is as follows: since the air inlet filter mechanism 3 only performs primary filtering, it needs to be filtered again through the rotating positioning mechanism 6. At this time, the air passes through the baffle 303 and enters the filter box 4. The second motor 606 starts to rotate and drives the cam 607 to rotate, pushing the push block 608 to move inside the slot. The push block 608 drives the ratchet 605 to rotate around the nail-shaped column 604, and drives the second filter screen 601 to rotate. At this time, the first torsion spring 611 and the second torsion spring 613 make the first claw 612 and the second claw 614 tightly engage the ratchet 605 to fix the rotation angle. At this time, the second filter screen 601 filters the dust, and the filtered dust falls into the filter box 4 to get the bottom. The flexible accordion cover 602 maintains the sealing between the second filter screen 601 and the inner wall of the filter box 4, so that the dust can only be filtered and moved by the second filter screen 601. The three sets of symmetrically arranged rotating positioning mechanisms 6 can realize multi-stage filtration of dust, and filter different particles of dust through the filter screens that can rotate independently.

[0033] Example 3: Please refer to Figure 7-Figure 9On the basis of the first embodiment, the present invention provides a technical solution: the filter cleaning mechanism 9 includes a first connecting block 901, the inner surface of the first connecting block 901 is fixedly connected to the rotating shaft portion of the second filter 601, the middle axis of the first connecting block 901 is fixedly connected to a third motor 902, the output end of the third motor 902 is fixedly connected to a special-shaped connecting block 905, the left and right ends of the special-shaped connecting block 905 are fixedly connected to a rectangular column 906, the inner surface of the rectangular column 906 is fixedly connected to a lead screw 907, and the outer surface of the lead screw 907 is threadedly connected to a slider 9 08, the bottom of the slider 908 is fixedly connected with a first butterfly spring 909, the bottom plate of the first butterfly spring 909 is fixedly connected with a scraper 910, the bottom of the special-shaped connecting block 905 is fixedly connected with a second butterfly spring 911, the second butterfly spring 911 is fixedly connected with an I-shaped card block 912, the bottom of the I-shaped card block 912 is fixedly connected with bristles 913, the bottom plate of the filter box 4 is fixedly connected with a guide plate 903 by opening a through hole, the bottom of the filter box 4 is fixedly connected with a connecting groove 904, and the bottom of the connecting groove 904 is fixedly connected to the first filter tank 11; The second butterfly spring 911, the I-shaped block 912 and the bristles 913 are arranged on the left and right sides of the special-shaped connecting block 905, and the filter cleaning mechanism 9 is arranged on the outer surface of the three sets of symmetrically arranged rotating positioning mechanisms 6. By setting the filter cleaning mechanism 9, a high degree of synchronization is achieved between the rotation of the filter cleaning mechanism 9 and the rotation of the filter. The bristles 913 and the scraper 910 are closely fitted with the second filter 601 to achieve the best cleaning effect, which can continuously maintain efficient filtering performance, extend the service life of the filter, reduce the frequency and cost of replacing the filter, and provide a clean and safe working environment for the construction site.

[0034] The working principle of this embodiment is as follows: when performing multi-stage filtration through the rotating positioning mechanism 6, the filter surface needs to be cleaned to maintain a high cleaning efficiency, so that the first connecting block 901 rotates along with the rotation of the second filter 601, and the third motor 902 starts to rotate, driving the rotation of the special-shaped connecting block 905 and the rotation of the lead screw 907, and the slider 908 is driven by the lead screw 907. It is driven to move along the outer surface of the lead screw 907, and the first butterfly spring 909 makes the scraper 910 fit tightly to the surface of the second filter 601, so that the scraper 910 has a good cleaning effect when moving for cleaning. The third motor 902 drives the rotation to complete the cleaning of the surface of the second filter 601. The second butterfly spring 911 on the lower surface of the special-shaped connecting block 905 makes the bristles 913 fit tightly to the surface of the flexible accordion cover 602 through the I-shaped clamp block 912 and cleans it, so that the tensile properties of the flexible accordion cover 602 are maintained, and the dust gathered at the bottom of the filter box 4 enters the connecting groove 904 through the guide plate 903. The symmetrically arranged filter cleaning mechanism 9 can clean the multi-stage filter, and the cleaned dust enters the first filter groove 11 through the connecting groove 904 for collection.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dust filtering device for construction engineering, comprising a base (1), the bottom of the base (1) being fixedly connected to a support block (2), a water tank (10) and a collecting tank (7), the left side of the water tank (10) being fixedly connected to a water pipe (8), the output end of the water pipe (8) being fixedly connected to an air inlet filter mechanism (3), the right side of the air inlet filter mechanism (3) being fixedly connected to a filter box (4), the top of the filter box (4) being fixedly connected to a rotation positioning mechanism (6), the right side of the filter box (4) being fixedly connected to a rotary dust collector (5), the outer surface of the rotation positioning mechanism (6) being fixedly connected to a filter screen cleaning mechanism (9), the top of the water tank (10) being fixedly connected to a first filter tank (11), the top of the support block (2) being fixedly connected to a second filter tank (12), characterized in that: Also includes: An air intake filter mechanism (3), wherein the bottom of the air intake filter mechanism (3) is fixedly connected to the top of the second filter tank (12), the air intake filter mechanism (3) comprises an air intake box (301), the air intake box (301) is fixedly connected to the top of the second filter tank (12), an annular column (302) is fixedly connected inside the air intake box (301), a baffle (303) is rotatably connected inside the air intake box (301) via a slot, a first motor (304) is fixedly connected to the outer surface of the air intake box (301) via a through hole, an impeller (305) is fixedly connected to the output end of the first motor (304), and an annular connecting block (306) is fixedly connected to the outer surface of the impeller (305).

2. A dust filtering device for construction engineering according to claim 1, characterized in that: The air inlet filtering mechanism (3) further comprises a first filter screen (307), the inner wall of the first filter screen (307) being fixedly connected to the annular connecting block (306), the bottom of the first filter screen (307) being fixedly connected to a first clamping block (308), the interior of the air inlet box (301) being provided with a first clamping groove (309), the first clamping groove (309) being clamped to the first clamping block (308), the outer surface of the air inlet box (301) being fixedly connected to an air inlet (310), the bottom of the air inlet box (301) being fixedly connected to a rotating shaft via a clamping groove, and the outer surface of the rotating shaft being rotatably connected to a first valve (311) and a second valve (312), and the top of the air inlet box (301) being fixedly connected to a nozzle (313) via a through hole.

3. A dust filtering device for construction engineering according to claim 1, characterized in that: The rotation positioning mechanism (6) comprises a second filter screen (601), the outer surface of the second filter screen (601) is fixedly connected to a flexible accordion cover (602), the outer surface of the flexible accordion cover (602) is fixedly connected to the inner wall of the filter box (4), the interior of the filter box (4) is rotatably connected to the second filter screen (601) by opening a circular hole, the top of the filter box (4) is fixedly connected to a top plate (603), the top of the second filter screen (601) is fixedly connected to a nail-shaped column (604), the outer surface of the nail-shaped column (604) is fixedly connected to a ratchet (605), and the top of the top plate (603) is fixedly connected to a second motor (606). The output end of the second motor (606) is fixedly connected to a cam (607); the top of the top plate (603) is clamped with a push block (608) by providing a clamping slot; the left side of the push block (608) is fixedly connected to a first spring (609); the left side of the first spring (609) is fixedly connected to a stopper (610); the stopper (610) is fixedly connected to the top plate (603); the top of the top plate (603) is fixedly connected to a first torsion spring (611) and a second torsion spring (613); the top of the first torsion spring (611) is fixedly connected to a first claw (612); the top of the second torsion spring (613) is fixedly connected to a second claw (614).

4. A dust filtering device for construction engineering according to claim 1, characterized in that: The filter cleaning mechanism (9) comprises a first connection block (901), the inner surface of the first connection block (901) being fixedly connected to the rotating shaft portion of the second filter (601), a third motor (902) being fixedly connected to the central axis of the first connection block (901), an output end of the third motor (902) being fixedly connected to a special-shaped connection block (905), a rectangular column (906) being fixedly connected to the left and right ends of the special-shaped connection block (905), a lead screw (907) being fixedly connected to the inner surface of the rectangular column (906), a slider (908) being threadedly connected to the outer surface of the lead screw (907), and a slider (908) being threadedly connected to the slider (908). A first butterfly spring (909) is fixedly connected to the bottom, a scraper (910) is fixedly connected to the bottom plate of the first butterfly spring (909), a second butterfly spring (911) is fixedly connected to the bottom of the special-shaped connection block (905), an I-shaped clamping block (912) is fixedly connected to the second butterfly spring (911), a brush (913) is fixedly connected to the bottom of the I-shaped clamping block (912), a guide plate (903) is fixedly connected to the bottom plate of the filter box (4) by opening a through hole, a connecting groove (904) is fixedly connected to the bottom of the filter box (4), and the bottom of the connecting groove (904) is fixedly connected to the first filter groove (11).

5. A dust filtering device for construction engineering according to claim 2, characterized in that: The bottom and top of the first filter screen (307) are both fixedly connected to a first clamping block (308), and are both clamped to a symmetrically arranged first clamping groove (309); the diameter of the air inlet (310) is the same as the diameter of the impeller (305); and the outer surfaces of the first valve (311) and the second valve (312) are in contact with the inner surface of the second filter tank (12).

6. A dust filtering device for construction engineering according to claim 3, characterized in that: The second filter screen (601) is fixedly connected to the nail-shaped column (604) through a through hole provided between the filter box (4) and the top plate (603); the bottoms of the first clamping claw (612) and the second clamping claw (614) are rotatably connected to the top plate (603) through a circular column; the left side of the push block (608) is in contact with the outer surface of the ratchet (605); the top of the top plate (603) is fixedly connected to a component of a box-wrapped rotation positioning mechanism (6); and three groups of the rotation positioning mechanism (6) are arranged inside the filter box (4).

7. A dust filtering device for construction engineering according to claim 4, characterized in that: The second butterfly spring (911), the I-shaped clamp block (912) and the bristles (913) are arranged on both the left and right sides of the special-shaped connecting block (905), and the outer surfaces of the three sets of symmetrically arranged rotation positioning mechanisms (6) are all provided with filter cleaning mechanisms (9).

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