Spraying and dust settling device for building construction

Abstract

The invention relates to the technical field of spraying and dust falling devices, in particular to a spraying and dust falling device for building construction, which comprises a rack, a moving mechanism arranged in the rack, a water pump arranged in the rack and a spraying mechanism arranged at the top of the rack, a first annular water pipe is mounted at the output end of the first rectifying pipe, and a plurality of first atomizing nozzles are arranged on one side of the first annular water pipe at equal intervals; a second rectifying pipe is concentrically arranged in the first rectifying pipe, a second annular water pipe is installed at the output end of the second rectifying pipe, a plurality of second atomizing nozzles are arranged on one side of the second annular water pipe at equal intervals, and the first annular water pipe and the second annular water pipe are connected with the output end of the water pump through hoses. A rotating shaft capable of rotating is installed in the second rectifying pipe, fan blades are fixed to the end of the rotating shaft, and an impeller is further fixed to the rotating shaft. The problems that a spraying dust-settling device is small in spraying water mist density and limited in spraying range, and consequently the dust-settling effect is not ideal are solved.

Description

Technical Field

[0001] This invention relates to the field of spray dust suppression devices, specifically to a spray dust suppression device for building construction. Background Technology

[0002] Spray dust suppression systems are widely used environmental protection equipment in mines, construction sites, roads, and industrial areas. They utilize high-pressure water pumps to atomize water into micron-sized droplets, which are then sprayed into the air to combine with dust particles, increasing their weight and causing them to settle, thus effectively suppressing dust pollution. These systems offer advantages such as simple structure, convenient operation, water conservation, high efficiency, and wide coverage. They can be flexibly configured as fixed or mobile systems according to site requirements and support automatic sensor control for intelligent operation. Spray dust suppression not only improves the working environment and protects worker health but also meets environmental regulations, making it a crucial technological means for modern dust control.

[0003] Patent document CN211725130U discloses a spray dust suppression device, relating to the environmental protection field. The technical problem it solves is to provide a spray dust suppression device that uses water mist to adsorb dust from the air, achieving a dust suppression effect. The technical solution adopted by this utility model is as follows: The spray dust suppression device includes a housing, a support member, and a cylinder. A water tank is installed inside the housing. The support member is installed on the top of the housing, and the cylinder is mounted on the top of the support member. A high-pressure jet fan is installed inside the cylinder. An air inlet and an air outlet are formed at both ends of the cylinder. A micro-atomizing nozzle is installed at the air outlet of the cylinder, and the water supply pipe of the micro-atomizing nozzle is connected to the water tank. The spray dust suppression device utilizes the micro-atomizing nozzle to atomize water, and then uses the large air volume and high air pressure of the high-pressure jet fan to deliver the atomized water mist to a greater distance. This allows the water mist to reach a greater distance and cover a larger area, thereby achieving the effect of dust suppression, reducing the concentration of dust in the air, and improving air quality.

[0004] The aforementioned dust suppression spray device in the patent document uses a single set of micro-atomizing nozzles at the end of a cylinder, and a high-pressure jet fan inside the cylinder. This allows the micro-atomizing nozzles to spray water mist while the high-pressure jet fan generates a high-speed airflow, propelling the water mist into the air and thus achieving dust suppression. However, existing dust suppression spray devices only use a single set of micro-atomizing nozzles at the end of the cylinder, resulting in a low density of the sprayed water mist and poor dust suppression effectiveness. Therefore, a dust suppression spray device for construction is proposed. Summary of the Invention

[0005] To address the aforementioned problems, a spray dust suppression device for construction is provided. A first servo motor drives a rotating shaft to rotate at high speed, which in turn drives an impeller and fan blades to rotate at high speed. This causes the impeller and fan blades to drive the air inside the first rectifier tube at high speed. The high-speed airflow is then rapidly discharged from the output ends of the first and second rectifier tubes, thereby increasing the spray range of the dust suppression device. This solves the problem of low water mist density and limited spray range in traditional dust suppression devices, which leads to unsatisfactory dust suppression effects.

[0006] To address the problems of existing technologies, the present invention provides a spray dust suppression device for building construction, comprising a frame, a moving mechanism disposed inside the frame, a water pump disposed inside the frame, and a spray mechanism disposed on the top of the frame. The spray mechanism includes a first rectifier pipe, a first annular water pipe installed at the output end of the first rectifier pipe, and a plurality of first atomizing nozzles equidistantly disposed on one side of the first annular water pipe. A second rectifier tube is concentrically arranged inside the first rectifier tube. A second annular water pipe is installed at the output end of the second rectifier tube. Several second atomizing nozzles are equidistantly arranged on one side of the second annular water pipe. The first annular water pipe and the second annular water pipe are respectively connected to the output end of the water pump through flexible hoses. The second rectifier tube is equipped with a rotating shaft, and a fan blade is fixed to the end of the rotating shaft. An impeller is also fixed on the rotating shaft. A first servo motor for driving the rotating shaft to rotate is installed at the end of the first rectifier tube near the second rectifier tube.

[0007] As a technical solution of the present invention, bearings are installed on both the outer wall and the inner wall of the end of the second rectifier tube away from the second annular water pipe. The impeller includes a ring seat, which is sleeved on the bearing, and several blades are fixed at equal intervals on the inner and outer rings of the ring seat.

[0008] As a technical solution of the present invention, a first mounting groove for installing a first annular water pipe is provided at one end of the first rectifier tube, and a first annular fixing seat for preventing the first annular water pipe from falling off is installed in the first mounting groove. The first annular fixing seat is provided with through holes corresponding to the number of first atomizing nozzles.

[0009] As a technical solution of the present invention, the output end of the second rectifier tube is provided with a second mounting groove for installing the second annular water pipe, and a second annular fixing seat is installed in the second mounting groove to prevent the second annular water pipe from falling off. The second annular fixing seat is provided with through holes corresponding to the second atomizing nozzles.

[0010] As a technical solution of the present invention, a second servo motor is installed on one side of the bottom of the frame, and a lead screw capable of driving the moving mechanism to move horizontally is installed at the output end of the second servo motor. The moving mechanism includes a moving seat installed in the frame, and a threaded hole is provided at the center of the moving seat, which is engaged with the screw thread.

[0011] As a technical solution of the present invention, inclined rods are symmetrically fixed on both sides of the upper end face of the movable seat, and U-shaped grooves are provided on the inclined rods; The bottom of the first rectifier tube, away from the output end, is fixed with a support base. The two sides of the support base are horizontally fixed with first mounting rods, which are installed in the U-shaped groove.

[0012] As one technical solution of the present invention, the top of the frame is symmetrically fixed with brackets on both sides; The first rectifier tube is symmetrically fixed with second mounting rods on both sides, and the end of the second mounting rod away from the first rectifier tube is rotatably mounted on the bracket.

[0013] As a technical solution of the present invention, the bottom of the frame is provided with symmetrical limiting grooves on both sides to limit the tilting rod.

[0014] As a technical solution of the present invention, two sets of first fixing brackets are fixed to the outside of the second rectifier tube, and the outer circumference of the first fixing brackets is fixed to the inner wall of the first rectifier tube. Two sets of second fixing brackets are symmetrically installed on the rotating shaft. The rotating shaft is rotatably connected to the second fixing brackets. One set of second fixing brackets is fixed on the inner wall of the first rectifier tube, and the other set of second fixing brackets is fixed on the inner wall of the second rectifier tube.

[0015] As one technical solution of the present invention, a protective mesh plate is fixed to the end of the first rectifier tube away from the output end.

[0016] The advantages of this invention compared to the prior art are: 1. This application utilizes a first servo motor to drive a rotating shaft at high speed, which in turn drives the impeller and fan blades to rotate at high speed. This causes the impeller and fan blades to drive the air inside the first rectifier tube to flow at high speed. At this time, the high-speed airflow is rapidly discharged from the output ends of the first and second rectifier tubes, thereby increasing the spray range of the dust suppression device. This solves the problem of low water mist density and limited spray range in dust suppression devices, resulting in unsatisfactory dust suppression effects.

[0017] 2. This application avoids friction between the impeller and the surface of the second rectifier tube by fitting a ring seat onto the bearing, causing the impeller to rotate and thus driving the bearing to rotate as well. By fixing blades on the inner and outer rings of the ring seat, the blades simultaneously drive the airflow within the first rectifier tube when the impeller rotates. At this time, the air can flow at high speed along both the first and second rectifier tubes, thereby increasing the spraying distance of the dust suppression device.

[0018] 3. This application utilizes a movable base to drive a tilting rod to move synchronously. At this time, the first mounting rod moves along the U-shaped groove, and the U-shaped groove and the first mounting rod cooperate to drive the support base, causing the support base to move one end of the first rectifier tube upwards or downwards. When one end of the first rectifier tube moves upwards or downwards, the first rectifier tube rotates around the center of the second mounting rod. This allows the angle of the first rectifier tube to be adjusted. Attached Figure Description

[0019] Figure 1 This is a three-dimensional diagram of a spray dust suppression device used in building construction.

[0020] Figure 2 This is a cross-sectional view of a spray dust suppression device used in building construction.

[0021] Figure 3 This is a three-dimensional view of the spray mechanism in a dust suppression spraying device used in building construction.

[0022] Figure 4 This is an exploded view of the spray mechanism in a dust suppression spraying device used in building construction.

[0023] Figure 5 This is a three-dimensional view of the second rectifier tube in a spray dust suppression device used in building construction.

[0024] Figure 6 This is an exploded view of the second rectifier tube and impeller in a spray dust suppression device used in building construction.

[0025] Figure 7 This is a three-dimensional view of an impeller in a spray dust suppression device used in building construction.

[0026] Figure 8 This is an assembly diagram of the second rectifier tube and impeller in a spray dust suppression device used in building construction.

[0027] Figure 9 This is a three-dimensional view of a moving mechanism in a spray dust suppression device used in building construction.

[0028] Figure 10 yes Figure 1 Enlarged view of point A in the image.

[0029] The diagram is labeled as follows: 1. Frame; 11. Limiting groove; 12. Bracket; 2. Water pump; 3. Moving mechanism; 31. Moving seat; 32. Inclined rod; 321. U-shaped groove; 33. Threaded hole; 4. Spraying mechanism; 41. First rectifier pipe; 411. Support base; 412. First mounting rod; 413. Protective mesh plate; 415. Second mounting rod; 416. First mounting groove; 417. First annular water pipe; 418. First atomizing nozzle; 4 19. First annular fixed seat; 421. First servo motor; 422. Rotating shaft; 423. Impeller; 4231. Ring seat; 4232. Blade; 424. Fan blade; 43. Second rectifier tube; 431. Second mounting groove; 432. Second annular water pipe; 434. Second annular fixed seat; 435. Bearing; 436. Second atomizing nozzle; 44. First fixing frame; 45. Second fixing frame; 5. Second servo motor; 51. Lead screw. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] See Figures 1-10 As shown, a spray dust suppression device for building construction includes a frame 1, a moving mechanism 3 disposed inside the frame 1, a water pump 2 disposed inside the frame 1, and a spray mechanism 4 disposed on the top of the frame 1. The spray mechanism 4 includes a first rectifier pipe 41, a first annular water pipe 417 installed at the output end of the first rectifier pipe 41, and a plurality of first atomizing nozzles 418 equidistantly disposed on one side of the first annular water pipe 417. A second rectifier tube 43 is concentrically arranged inside the first rectifier tube 41. A second annular water pipe 432 is installed at the output end of the second rectifier tube 43. Several second atomizing nozzles 436 are equidistantly arranged on one side of the second annular water pipe 432. The first annular water pipe 417 and the second annular water pipe 432 are respectively connected to the output end of the water pump 2 through flexible hoses. The second rectifier tube 43 is equipped with a rotating shaft 422, a fan blade 424 is fixed at the end of the rotating shaft 422, and an impeller 423 is also fixed on the rotating shaft 422. A first servo motor 421 for driving the rotation of the rotating shaft 422 is installed at the end of the first rectifier tube 41 near the end of the second rectifier tube 43.

[0032] Water pump 2 delivers water through hoses to the first annular water pipe 417 and the second annular water pipe 432. The water in these pipes is then sprayed out through the first atomizing nozzle 418 and the second atomizing nozzle 436, respectively. Then, the first servo motor 421 is activated, driving the rotating shaft 422 to rotate at high speed. Simultaneously, the rotating shaft 422 drives the impeller 423 and fan blades 424 to rotate at high speed. This causes the impeller 423 and fan blades 424 to drive the air in the first rectifier tube 41 to flow at high speed. This high-speed airflow is then rapidly discharged from the output ends of the first and second rectifier tubes 41 and 43, thereby increasing the spray range of the dust suppression device. This solves the problem of low water mist density and limited spray range in dust suppression devices, which leads to unsatisfactory dust suppression effects.

[0033] See Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, bearings 435 are installed on both the outer and inner walls of the end of the second rectifier tube 43 away from the second annular water pipe 432; The impeller 423 includes a ring seat 4231, which is sleeved on the bearing 435. Several blades 4232 are fixed at equal intervals on the inner and outer rings of the ring seat 4231.

[0034] By mounting the four-ring seat 4231 onto the bearing 435, the impeller 423 drives the bearing 435 to rotate when the impeller 423 rotates, thus preventing friction between the impeller 423 and the surface of the second rectifier tube 43. By fixing blades 4232 on the inner and outer rings of the ring seat 4231, when the impeller 423 rotates, the blades 4232 simultaneously drive the airflow within the first rectifier tube 41. At this time, the air can flow at high speed along the first rectifier tube 41 and the second rectifier tube 43.

[0035] See Figure 4 As shown, one end of the first rectifier tube 41 is provided with a first mounting groove 416 for installing the first annular water pipe 417. A first annular fixing seat 419 for preventing the first annular water pipe 417 from falling off is installed in the first mounting groove 416. The first annular fixing seat 419 is provided with through holes corresponding to the number of first atomizing nozzles 418.

[0036] To prevent the first annular water pipe 417 from falling off, the first annular water pipe 417 is installed in the first mounting groove 416, and then the first annular fixing seat 419 is installed in the first mounting groove 416. This fixes the first annular water pipe 417 in place, effectively preventing it from falling out of the first mounting groove 416. By opening several through holes in the first annular fixing seat 419, when the first annular fixing seat 419 is installed in the first mounting groove 416, the first atomizing nozzle 418 on one side of the first annular water pipe 417 will be inserted into the through holes in the first annular fixing seat 419. This allows the first atomizing nozzle 418 to penetrate the first annular fixing seat 419, preventing the first annular fixing seat 419 from interfering with the spraying of water mist by the first atomizing nozzle 418.

[0037] See Figure 5 , Figure 6 and Figure 8 As shown, the output end of the second rectifier tube 43 is provided with a second mounting groove 431 for installing the second annular water pipe 432. A second annular fixing seat 434 is installed in the second mounting groove 431 to prevent the second annular water pipe 432 from falling off. The second annular fixing seat 434 is provided with through holes corresponding to the second atomizing nozzle 436.

[0038] To prevent the second annular water pipe 432 from detaching from the second mounting groove 431, a second annular fixing seat 434 is installed inside the second mounting groove 431, with one side of the second annular fixing seat 434 abutting against one side of the second annular water pipe 432. This effectively secures the second annular water pipe 432 and prevents it from falling out of the second mounting groove 431. A through hole is provided in the second annular fixing seat 434, allowing the second atomizing nozzle 436 to be inserted into the through hole when the second annular fixing seat 434 is installed in the second mounting groove 431. This ensures that the output end of the second atomizing nozzle 436 can pass through the second annular fixing seat 434, preventing the second annular fixing seat 434 from interfering with the water mist spraying of the third fixing frame 46.

[0039] See Figure 2 and Figure 9 As shown, a second servo motor 5 is installed on one side of the bottom of the frame 1, and a lead screw 51 capable of driving the moving mechanism 3 to move horizontally is installed at the output end of the second servo motor 5. The moving mechanism 3 includes a moving seat 31 installed in the frame 1. A threaded hole 33 is provided at the center of the moving seat 31, and the threaded hole 33 is threadedly engaged with the lead screw 51.

[0040] In order to achieve effective movement of the moving mechanism 3, the second servo motor 5 is started. The second servo motor 5 can drive the lead screw 51 to rotate. When the lead screw 51 rotates, it can drive the moving seat 31 to move horizontally through the threaded hole 33 that is in contact with the thread.

[0041] See Figure 1 , Figure 2 and Figure 9 As shown, inclined rods 32 are symmetrically fixed on both sides of the upper end face of the movable seat 31, and U-shaped grooves 321 are provided on the inclined rods 32; A support base 411 is fixed to the bottom of the first rectifier tube 41 away from the output end. First mounting rods 412 are fixed horizontally on both sides of the support base 411. The first mounting rods 412 are installed in the U-shaped groove 321.

[0042] When the movable seat 31 moves, it will drive the tilting rod 32 to move synchronously. At this time, the first mounting rod 412 will move along the U-shaped groove 321. The U-shaped groove 321 and the first mounting rod 412 work together to drive the support base 411, so that the support base 411 drives one end of the first rectifier tube 41 to move up or down.

[0043] See Figure 1 , Figure 3 , Figure 4 , Figure 9 and Figure 10 As shown, brackets 12 are symmetrically fixed on both sides of the top of the frame 1; The first rectifier tube 41 is symmetrically fixed with second mounting rods 415 on both sides, and the end of the second mounting rod 415 away from the first rectifier tube 41 is rotatably mounted on the bracket 12.

[0044] The second mounting rod 415 is rotatably mounted on the bracket 12 at the end furthest from the first rectifier tube 41. As one end of the first rectifier tube 41 moves up or down, the first rectifier tube 41 rotates around the center of the second mounting rod 415, allowing the angle of the first rectifier tube 41 to be adjusted.

[0045] The bottom of the frame 1 has symmetrically provided limiting grooves 11 on both sides to limit the tilting rod 32.

[0046] To ensure the stability of the movable seat 31, an inclined rod 32 fixed to the upper surface of the movable seat 31 is installed in the limiting groove 11. When the movable seat 31 moves, it will drive the inclined rod 32 to move along the limiting groove 11. The limiting groove 11 and the inclined rod 32 work together to limit the movable seat 31, thereby ensuring the stability of the movable seat 31 when it moves.

[0047] The second rectifier tube 43 is externally fixed with two sets of first fixing brackets 44, and the outer circumference of the first fixing brackets 44 is fixed on the inner wall of the first rectifier tube 41. Two sets of second fixing brackets 45 are symmetrically installed on the rotating shaft 422. The rotating shaft 422 is rotatably connected to the second fixing brackets 45. One set of second fixing brackets 45 is fixed on the inner wall of the first rectifier tube 41, and the other set of second fixing brackets 45 is fixed on the inner wall of the second rectifier tube 43.

[0048] To ensure the stability of the second rectifier tube 43, a first fixing bracket 44 is fixed to the outer wall of the second rectifier tube 43, and then the outer circumference of the first fixing bracket 44 is fixed to the inner wall of the first rectifier tube 41, so that the first fixing bracket 44 can fix the second rectifier tube 43 inside the first rectifier tube 41. This ensures the stability of the second rectifier tube 43. To ensure the stability of the rotating shaft 422, two sets of second fixing brackets 45 are installed on the rotating shaft 422, and then the two sets of second fixing brackets 45 are fixed to the inner walls of the second rectifier tube 43 and the first rectifier tube 41 respectively, so that the second fixing brackets 45 limit the rotation shaft 422, thereby ensuring the stability of the rotating shaft 422.

[0049] A protective mesh plate 413 is fixed to the end of the first rectifier tube 41 furthest from the output end.

[0050] To prevent debris from entering the first rectifier tube 41, a protective mesh plate 413 is fixed to the end of the first rectifier tube 41 furthest from the output end. When air enters the first rectifier tube 41, the protective mesh plate 413 can block debris carried in the air from entering the first rectifier tube 41. This prevents debris from entering the first rectifier tube 41 and causing malfunction of the spray dust suppression device.

[0051] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A spraying dust-settling device for construction, comprising a frame (1), a moving mechanism (3) arranged inside the frame (1), a water pump (2) arranged inside the frame (1), and a spraying mechanism (4) arranged on the top of the frame (1), characterized in that, The spray mechanism (4) comprises a first rectifier pipe (41), and a first annular water pipe (417) is installed at the output end of the first rectifier pipe (41); a plurality of first atomizing nozzles (418) are equidistantly arranged on one side of the first annular water pipe (417); A second rectifier pipe (43) is concentrically arranged in the first rectifier pipe (41), a second annular water pipe (432) is installed at the output end of the second rectifier pipe (43), and a plurality of second atomizing nozzles (436) are equidistantly arranged on one side of the second annular water pipe (432); and the first annular water pipe (417) and the second annular water pipe (432) are respectively connected with the output end of the water pump (2) through a hose; A rotating shaft (422) capable of rotating is installed in the second rectifier pipe (43), a fan blade (424) is fixed at the end of the rotating shaft (422), and an impeller (423) is further fixed on the rotating shaft (422); A first servo motor (421) for driving the rotating shaft (422) to rotate is installed at the end of the first rectifier pipe (41) close to the second rectifier pipe (43).

2. A spray dust-settling device for use in construction according to claim 1, wherein, Bearings (435) are installed on the outer wall and the inner wall of the end of the second rectifier pipe (43) away from the second annular water pipe (432); The impeller (423) comprises a ring seat (4231), the ring seat (4231) is sleeved on the bearing (435), and a plurality of blades (4232) are equidistantly fixed on the inner ring and the outer ring of the ring seat (4231).

3. A spray dust-settling device for use in construction according to claim 1, characterized in that, A first mounting groove (416) for mounting the first annular water pipe (417) is formed at one end of the first rectifier pipe (41), a first annular fixing seat (419) for preventing the first annular water pipe (417) from falling off is installed in the first mounting groove (416), and a plurality of through holes corresponding to the number of the first atomizing nozzles (418) are formed in the first annular fixing seat (419).

4. A spray dust-settling device for use in construction according to claim 1, characterized in that, A second mounting groove (431) for mounting the second annular water pipe (432) is formed at the output end of the second rectifier pipe (43), a second annular fixing seat (434) for preventing the second annular water pipe (432) from falling off is installed in the second mounting groove (431), and a plurality of through holes corresponding to the number of the second atomizing nozzles (436) are formed in the second annular fixing seat (434).

5. A dust-settling device for use in construction according to claim 1, characterized in that, A second servo motor (5) is installed on one side of the bottom of the rack (1), and a lead screw (51) capable of driving the moving mechanism (3) to move horizontally is installed at the output end of the second servo motor (5); The moving mechanism (3) comprises a moving seat (31) installed in the rack (1), a threaded hole (33) is formed at the center of the moving seat (31), and the threaded hole (33) is threadedly connected with the lead screw (51).

6. A spray dust-settling device for use in construction according to claim 5, wherein, Inclined rods (32) are symmetrically fixed on the two sides of the upper end surface of the moving seat (31), and a U-shaped groove (321) is formed in the inclined rod (32). A support base (411) is fixed at the bottom of the first rectifier pipe (41) away from the output end, first mounting rods (412) are horizontally fixed on the two sides of the support base (411), and the first mounting rods (412) are installed in the U-shaped groove (321).

7. A spray dust-settling device for use in construction according to claim 1, wherein, Support frames (12) are symmetrically fixed on the two sides of the top of the rack (1). Two sides of the first rectifier tube (41) are symmetrically fixed with second mounting rods (415), one end of the second mounting rod (415) away from the first rectifier tube (41) is rotatably mounted on the support (12).

8. A spray dust-settling device for use in construction according to claim 6, wherein, Two sides of the bottom of the rack (1) are symmetrically provided with limiting grooves (11) for limiting the inclined rods (32).

9. A spray dust-settling device for use in construction according to claim 1, characterized in that, The outer part of the second rectifier tube (43) is fixed with two groups of first fixing frames (44), and the outer circumference of the first fixing frame (44) is fixed on the inner wall of the first rectifier tube (41). Two groups of second fixing frames (45) are symmetrically mounted on the rotating shaft (422), and the rotating shaft (422) is rotatably connected with the second fixing frame (45). One group of second fixing frames (45) is fixed on the inner wall of the first rectifier tube (41), and the other group of second fixing frames (45) is fixed on the inner wall of the second rectifier tube (43).

10. A dust-settling device for use in construction according to claim 1, characterized in that, The end of the first rectifier tube (41) away from the output end is fixed with a protective mesh plate (413).

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