CN221277806U - Dust fall equipment - Google Patents

Abstract

The utility model discloses a dust fall device, comprising: the water sprinkling device comprises a fixing frame, wherein movable bases are arranged at the lower positions of two ends of the fixing frame, movable wheels are fixed at the four end angle positions of the lower end of the movable base, a fixed block is fixed at the top end of the movable base, and a water sprinkling assembly is arranged on the inner side of the fixing frame; and the lifting assembly is arranged at the inner side position of the fixed block. According to the dust settling equipment provided by the utility model, through the matched structural design of the water spraying assembly and the swinging assembly, the spraying range is effectively improved, the dust settling efficiency is improved, dust in a tunnel is effectively settled, meanwhile, the space occupation rate of a device can be reduced, the construction convenience of staff is improved, and the height of a fixing frame can be adjusted through the structural design of the lifting assembly, so that the height of the fixing frame can be conveniently adjusted according to different construction environments, the application range of the device is improved, and the practicability of the device is improved.

Description

Dust fall equipment

Technical Field

The utility model relates to the technical field of dust settling equipment, in particular to dust settling equipment.

Background

In the tunneling process of tunnel construction, dust can be generated in a tunnel hole, the dust can influence the labor capacity of workers and shorten the labor life of the workers, and serious influence is caused on human health, so that dust in the tunnel needs to be restrained except a protective device in order to reduce the damage of the dust in the tunnel construction.

As disclosed in chinese patent (CN 217119745U), an environment-friendly dust settling device for tunnel excavation is disclosed, wherein: "spout to the sky through multiunit shower nozzle, carry out dust fall to aerial dust and handle, start the motor simultaneously, the transmission drives the pivot and rotates, drives support and shower and rotates, makes the shower nozzle to spraying water all around, and two sets of lift cylinders of synchronous start drive two sets of piston rods reciprocate, drive the shower simultaneously and reciprocate, increase the area of contact of water smoke and dust, through above-mentioned setting, can improve the efficiency of dust fall, improve the effect of dust fall simultaneously", still recorded: in the process of excavating a tunnel, a large amount of dust is generated, in order to prevent the dust from diffusing, a worker uses a spray tool to spray water to reduce dust, however, the dust reduction mode has lower efficiency and poorer dust reduction effect.

In summary, the following technical problems exist in the prior art: in the process of tunnel excavation, the space in the tunnel is smaller, the device occupies more construction space when working, the construction of workers is inconvenient, meanwhile, the spray heads of most of the existing dust settling equipment are fixed, the spraying range is smaller, and the practicability of the device is reduced.

Disclosure of utility model

Based on this, it is necessary to provide a dust fall equipment to above-mentioned technical problem, through the cooperation structural design of watering subassembly and swing subassembly, the effectual scope that has improved to spray, the efficiency of dust fall has been promoted, thereby the effectual dust of carrying out dust fall to the dust in the tunnel is handled, can reduce the space occupation of device simultaneously, staff's construction convenience has been improved, and through the structural design of lifting unit, make can highly adjusting the mount, thereby the convenience is adjusted the height of mount according to different construction environment, the application scope of device has been improved, the practicality of device has been promoted.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a dust fall device is applied to tunnel excavation dust fall.

The dust fall equipment specifically comprises:

The water sprinkling device comprises a fixing frame, wherein movable bases are arranged at the lower positions of two ends of the fixing frame, movable wheels are fixed at the four end angle positions of the lower end of the movable base, a fixed block is fixed at the top end of the movable base, and a water sprinkling component is arranged at the inner side of the fixing frame;

the lifting assembly is arranged at the inner side position of the fixed block and used for adjusting the height of the fixed frame;

and the swinging assembly is arranged at the inner side position of one end of the fixing frame and is used for reciprocating and swinging the swinging rod.

As a preferred implementation mode of the dust settling equipment provided by the utility model, the water spraying component comprises a water storage tank, the water storage tank is arranged at the top end position of one side of one movable base, the water storage tank is fixedly connected with the movable base, a water pump is arranged at the lower end of one side of the water storage tank, which is close to the same-end fixing block, the water pump is fixedly connected with the movable base, the water pumping end of the water pump is connected with the water storage tank, a water outlet end of the water pump is fixedly provided with a guide hose, the guide hose extends to the top end position of the inner side of the fixed frame, a swinging rod is arranged at the top end of the inner side of the fixed frame and at the position corresponding to the guide hose, one end of the swinging rod extends to the inner side of the fixed frame, the swinging rod is rotationally connected with the fixed frame, and a plurality of atomizing spray heads are uniformly fixed at the position of the guide hose at the top end of the inner side of the fixed frame through a fixing ring.

As a preferred embodiment of the dust settling device provided by the utility model, the swinging assembly comprises a first motor, the first motor is arranged at the inner side of the fixed frame and at a position corresponding to the swinging rod, the first motor is fixedly connected with the fixed frame, a driving rod is fixed at the output end of the first motor, a movable frame is vertically arranged at one end of the driving rod far away from the first motor, the movable frame is in sliding connection with the fixed frame, a connecting sliding block is in sliding connection with the inner side of the movable frame, the connecting sliding block is fixedly connected with the driving rod, a movable block is longitudinally arranged at one side of the movable frame far away from the first motor, the movable block is fixedly connected with the movable frame, the movable block is in sliding connection with the fixed frame, a rack is fixed at the top end of the movable block, a swinging gear is fixed at the position corresponding to the position of the swinging rod extending to the inner side of the fixed frame, and the swinging rod is meshed with the rack.

As a preferred implementation mode of the dust settling device provided by the utility model, a limit sliding block is longitudinally arranged on one side of the movable block, which is far away from the movable frame, and is fixedly connected with the movable block, and the limit sliding block is in sliding connection with the fixed frame.

As a preferred embodiment of the dust settling device provided by the utility model, the lifting assembly comprises a screw rod, the screw rod is vertically arranged at the middle position of the inner side of the fixed block, the screw rod is rotationally connected with the fixed block, an internal threaded rod is in threaded connection with the outer side of the top end of the screw rod, the internal threaded rod is in sliding connection with the fixed block, the top end of the internal threaded rod is fixedly connected with the fixed frame, and a driving assembly is arranged at the lower end of the fixed block and at the position corresponding to the screw rod.

As a preferred embodiment of the dust settling device provided by the utility model, the driving assembly comprises a casing, the casing is arranged at the lower end of the fixed block and at a position corresponding to the screw rod, the casing is fixedly connected with the fixed block, the inner side of the casing is provided with a second motor, the second motor is fixedly connected with the movable base, the output end of the second motor extends to the inner side of the fixed block, the output end of the second motor is fixedly provided with a transmission bevel gear, the position corresponding to the transmission bevel gear of the screw rod is fixedly provided with a driven bevel gear, and the transmission bevel gear is in meshed connection with the driven bevel gear.

As a preferred implementation mode of the dust settling equipment provided by the utility model, the lifting assembly further comprises supporting rods, the supporting rods are vertically arranged at two ends of the fixed block, the supporting rods are in sliding connection with the fixed block, the top ends of the supporting rods are fixedly connected with the fixed frame, the two sides of the lower end of the supporting rods are fixedly provided with anti-falling blocks, and the anti-falling blocks are in sliding connection with the fixed block.

Compared with the prior art, the utility model has the following beneficial effects:

According to the dust settling equipment provided by the utility model, through the matched structural design of the water spraying assembly and the swinging assembly, the spraying range is effectively improved, the dust settling efficiency is improved, dust in a tunnel is effectively settled, meanwhile, the space occupation rate of a device can be reduced, the construction convenience of staff is improved, and the height of a fixing frame can be adjusted through the structural design of the lifting assembly, so that the height of the fixing frame can be conveniently adjusted according to different construction environments, the application range of the device is improved, and the practicability of the device is improved.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of a dust settling device provided by the utility model;

FIG. 2 is a schematic diagram of a connection structure between an atomization nozzle and a swinging rod of dust settling equipment;

FIG. 3 is a schematic diagram of a swing assembly of the dust settling device provided by the utility model;

FIG. 4 is a schematic structural view of a lifting assembly of the dust settling device provided by the utility model;

fig. 5 is an enlarged view of the dust settling device shown in fig. 4 at a.

The labels in the figures are illustrated below:

1. A fixing frame; 2. a movable base; 3. a fixed block; 4. a moving wheel; 5. a lifting assembly; 6. a water storage tank; 7. a water pump; 8. a guide hose; 9. a swinging rod; 10. an atomizing nozzle; 11. a fixing ring; 12. a first motor; 13. a driving rod; 14. the connecting slide block; 15. a moving rack; 16. a moving block; 17. a limit sliding block; 18. a swing gear; 19. a rack; 20. an anti-falling block; 21. a threaded rod is internally arranged; 22. a screw; 23. a casing; 24. a second motor; 25. a drive bevel gear; 26. a driven bevel gear; 27. and (5) supporting the rod.

Description of the embodiments

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As described in the background art, in the process of tunnel excavation, the space in the tunnel is smaller, the device occupies a construction space when working, the construction of workers is inconvenient, and meanwhile, the spray heads of most of the existing dust settling equipment are fixed, the spraying range is smaller, and the practicability of the device is reduced.

In order to solve the technical problem, the utility model provides dust falling equipment which is applied to tunnel excavation dust falling.

Specifically, referring to fig. 1 to 5, the dust settling device specifically includes:

The water spraying device comprises a fixing frame 1, wherein movable bases 2 are arranged at the lower positions of two ends of the fixing frame 1, movable wheels 4 are fixed at the four end angle positions of the lower end of the movable bases 2, fixed blocks 3 are fixed at the top end of the movable bases 2, and a water spraying component is arranged on the inner side of the fixing frame 1;

The lifting assembly 5 is arranged at the inner side position of the fixed block 3 and used for adjusting the height of the fixed frame 1;

and the swinging component is arranged at the inner side position of one end of the fixing frame 1 and is used for reciprocating and swinging the swinging rod 9.

According to the dust settling equipment provided by the utility model, through the matched structural design of the water spraying assembly and the swinging assembly, the spraying range is effectively improved, the dust settling efficiency is improved, dust in a tunnel is effectively settled, meanwhile, the space occupation rate of a device can be reduced, the construction convenience of staff is improved, and the height of the fixing frame 1 can be adjusted through the structural design of the lifting assembly 5, so that the height of the fixing frame 1 can be conveniently adjusted according to different construction environments, the application range of the device is improved, and the practicability of the device is improved.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Examples

Referring to fig. 1-3, a dust settling device includes a fixing frame 1, wherein moving bases 2 are respectively arranged at lower positions of two ends of the fixing frame 1, moving wheels 4 are respectively fixed at four end angle positions of the lower end of the moving bases 2, so that the device is convenient to move, a fixed block 3 is fixed at the top end of the moving bases 2, a sprinkling assembly is arranged at the inner side of the fixing frame 1, and dust settling operation is performed through the sprinkling assembly;

A swing assembly provided at an inner side position of one end of the fixing frame 1 for reciprocating the swing rod 9

The water spraying assembly comprises a water storage tank 6, a water source is provided for the device, the water storage tank 6 is arranged at the top end position of one side of the movable base 2, the water storage tank 6 is fixedly connected with the movable base 2, the water storage tank 6 is close to the lower end of one side of the same-end fixing block 3, the water pump 7 is fixedly connected with the movable base 2, the water pumping end of the water pump 7 is connected with the water storage tank 6, water in the water storage tank 6 can be pumped out through the water pump 7, a diversion hose 8 is fixed at the water outlet end of the water pump 7, the diversion hose 8 extends to the top end position of the inner side of the fixed frame 1, a swinging rod 9 is arranged at the position corresponding to the diversion hose 8, one end of the swinging rod 9 extends to the inner side of the fixed frame 1, the swinging rod 9 is rotationally connected with the fixed frame 1, a plurality of atomizing spray heads 10 are uniformly fixed at the position of the inner side top end of the diversion hose 8, the atomizing spray heads 10 are fixedly connected with the swinging rod 9 through a fixing ring 11, the atomizing heads 10 are simultaneously driven to swing through the swinging rods 9, and the atomizing heads 10 are further sprayed outside the water in the diversion hose 8;

Further, the swinging assembly comprises a first motor 12, the first motor 12 is arranged at the inner side of the fixed frame 1 and at a position corresponding to the swinging rod 9, the first motor 12 is fixedly connected with the fixed frame 1, the output end of the first motor 12 is fixedly provided with a driving rod 13, further, the driving rod 13 is driven to rotate along the output end of the first motor 12 by starting the first motor 12, one end of the driving rod 13 far away from the first motor 12 is vertically provided with a moving frame 15, the moving frame 15 is in sliding connection with the fixed frame 1, the inner side of the moving frame 15 is in sliding connection with a connecting sliding block 14, the connecting sliding block 14 is fixedly connected with the driving rod 13, further, when the driving rod 13 rotates, the moving frame 15 is driven to move by the connecting sliding block 14, one side of the moving frame 15 far away from the first motor 12 is longitudinally provided with a moving block 16, the moving block 16 is fixedly connected with the moving frame 15, further, when the moving frame 15 moves, the moving block 16 is in sliding connection with the fixed frame 1, the top end of the moving block 16 is fixedly provided with a 19, one end of the swinging rod 9 extends to the inner side of the fixed frame 1 and is fixedly provided with a swinging gear 18 corresponding to the atomizing nozzle 10, when the swinging gear 18 is in sliding connection with the connecting gear 19, and the swinging gear 19 is driven to move by the swinging gear 18;

Specifically, a limit sliding block 17 is longitudinally arranged on one side of the moving block 16 away from the moving frame 15, the limit sliding block 17 is fixedly connected with the moving block 16, the limit sliding block 17 is in sliding connection with the fixed frame 1, and further the limit sliding block 17 is used for limiting the moving block 16, so that the moving block 16 is prevented from moving up and down;

It is known that, during operation, at first the device removes the position to the required dust fall, then through starting first motor 12, make first motor 12 drive actuating lever 13 rotate with the output of first motor 12 as the center, drive connecting slider 14 simultaneously and rotate when actuating lever 13 rotates, because of connecting slider 14 and carriage 15 sliding connection, carriage 15 and carriage 16 fixed connection, thereby connecting slider 14 drive carriage 16 and remove through carriage 15 when rotating, because of carriage 16 is fixed with spacing slider 17, spacing slider 17 and mount 1 sliding connection, thereby make carriage 16 carry out reciprocating motion along self axial, drive rack 19 simultaneously and remove because of swing gear 18 and rack 19 meshing connection when carriage 16 removes, thereby make swing gear 18 reciprocating rotation, thereby drive the swing rod 9 that is fixed with swing gear 18 simultaneously rotate, and then the fixed solid fixed ring 11 through its fixed when carriage 9 rotates drives atomizer 10 and do reciprocating motion, thereby the effectual scope that has improved atomizer 10, then through starting water pump 7 and taking out inside water conservancy diversion 8 of swing rod 9 to the inside, the inside of final water conservancy diversion 8 has been taken out, the efficiency of the hose has been improved, thereby effectively spraying the dust fall can be effectively improved, the efficiency of the device has been sprayed to the dust can be improved, the dust can be effectively sprayed to the inner of the tunnel, the efficiency has been improved, the dust can be sprayed to the device is convenient, the dust can be sprayed to the efficiency is convenient.

Examples

Further optimizing the dust settling device provided in embodiment 1, specifically, as shown in fig. 4 and 5, a lifting assembly 5 is provided at an inner side position of the fixed block 3 for adjusting the height of the fixed frame 1;

The lifting assembly 5 comprises a screw rod 22, the screw rod 22 is vertically arranged at the middle position of the inner side of the fixed block 3, the screw rod 22 is rotationally connected with the fixed block 3, an internal threaded rod 21 is in threaded connection with the outer side of the top end of the screw rod 22, when the screw rod 22 rotates, the internal threaded rod 21 is driven to move along the axial direction of the screw rod 22, the internal threaded rod 21 is in sliding connection with the fixed block 3, the top end of the internal threaded rod 21 is fixedly connected with the fixed frame 1, a driving assembly is arranged at the lower end of the fixed block 3 and at the position corresponding to the screw rod 22, and the screw rod 22 is driven to rotate by the driving assembly;

Further, the driving assembly comprises a casing 23, the casing 23 is arranged at the lower end of the fixed block 3 and at a position corresponding to the screw rod 22, the casing 23 is fixedly connected with the fixed block 3, a second motor 24 is arranged at the inner side of the casing 23, the second motor 24 is fixedly connected with the movable base 2, the output end of the second motor 24 extends to the inner side of the fixed block 3, a transmission bevel gear 25 is fixed at the output end of the second motor 24, the transmission bevel gear 25 is driven to rotate by starting the second motor 24, a driven bevel gear 26 is fixed at the position corresponding to the screw rod 22 and the transmission bevel gear 25, the transmission bevel gear 25 is meshed and connected with the driven bevel gear 26, and the screw rod 22 is driven to rotate by the driven bevel gear 26 when the transmission bevel gear 25 rotates;

Specifically, lifting unit 5 is still including bracing piece 27, and the equal vertical bracing piece 27 that is provided with in both ends of fixed block 3, and then through bracing piece 27 reinforcing to the supporting role of mount 1, bracing piece 27 and fixed block 3 sliding connection, bracing piece 27's top and fixed frame 1 fixed connection, bracing piece 27's lower extreme both sides all are fixed with anticreep piece 20, anticreep piece 20 and fixed block 3 sliding connection, and then can avoid bracing piece 27 to drop from fixed block 3 inboard through anticreep piece 20.

Through the above-mentioned structural design, when needs go on lifting adjustment with mount 1, at first through starting second motor 24, make second motor 24 drive transmission bevel gear 25 rotate, drive screw 22 through the driven bevel gear 26 who is connected rather than the meshing when transmission bevel gear 25 rotates and rotate, drive built-in threaded rod 21 and remove along the axial of screw 22 when screw 22 rotates, thereby built-in threaded rod 21 drives mount 1 and carries out vertical movement, and then accomplish the altitude mixture control to mount 1, drive bracing piece 27 and anticreep piece 20 simultaneously remove when mount 1 removes, thereby can effectually avoid bracing piece 27 fixed block 3 inboard landing through anticreep piece 20, and then the convenience is adjusted the height of mount 1 according to different construction environment, the application scope of device has been improved, the practicality of device has been promoted.

The dust settling device provided by the utility model has the following using process: when in operation, firstly, the device moves to the position of dust fall, then the first motor 12 is started, so that the first motor 12 drives the driving rod 13 to rotate by taking the output end of the first motor 12 as the center, when the driving rod 13 rotates, the connecting sliding block 14 is driven to rotate simultaneously, the connecting sliding block 14 is in sliding connection with the moving frame 15, the moving frame 15 is fixedly connected with the moving block 16, when the connecting sliding block 14 rotates, the moving block 16 is driven to move through the moving frame 15, the moving block 16 is fixed with the limiting sliding block 17, the limiting sliding block 17 is in sliding connection with the fixed frame 1, the moving block 16 reciprocates along the axial direction of the moving block, when the moving block 16 moves, the rack 19 is driven to move simultaneously, the swinging gear 18 is driven to reciprocate by the meshing connection of the swinging gear 18, and the swinging rod 9 fixed with the swinging gear 18 is driven to rotate simultaneously, the fixed ring 11 fixed on the swinging rod 9 drives the atomizing spray head 10 to do reciprocating swinging motion when the swinging rod 9 rotates, so that the spraying range of the atomizing spray head 10 is effectively improved, then the water pump 7 is started, the water in the swinging rod 9 is pumped out to the inside of the guide hose 8 by the water pump 7, finally dust falling operation is carried out by spraying the water outwards through the atomizing spray head 10, when the fixing frame 1 needs to be adjusted in a lifting manner, the second motor 24 is started firstly, the second motor 24 drives the transmission bevel gear 25 to rotate, when the transmission bevel gear 25 rotates, the driven bevel gear 26 meshed with the transmission bevel gear 25 drives the screw 22 to rotate, the built-in threaded rod 21 is driven to move along the axial direction of the screw 22 when the screw 22 rotates, so that the built-in threaded rod 21 drives the fixing frame 1 to vertically move, and further the height adjustment of the fixing frame 1 is completed, meanwhile, the fixing frame 1 drives the supporting rod 27 and the anti-falling block 20 to move simultaneously when moving, and the supporting rod 27 can be effectively prevented from sliding off from the inner side of the fixing block 3 through the anti-falling block 20.

Claims (7)

1. A dust settling device, comprising:

The water spraying device comprises a fixing frame (1), wherein movable bases (2) are arranged at the lower positions of two ends of the fixing frame (1), movable wheels (4) are fixed at the four end angle positions of the lower end of the movable bases (2), fixed blocks (3) are fixed at the top ends of the movable bases (2), and a water spraying component is arranged on the inner side of the fixing frame (1);

The lifting assembly (5) is arranged at the inner side of the fixed block (3) and used for adjusting the height of the fixed frame (1);

And the swinging assembly is arranged at the inner side position of one end of the fixing frame (1) and is used for reciprocating and swinging the swinging rod (9).

2. The dust fall equipment according to claim 1, characterized in that the water spraying assembly comprises a water storage tank (6), the water storage tank (6) is arranged at the top end position of one side of one movable base (2), the water storage tank (6) is fixedly connected with the movable base (2), the water storage tank (6) is close to the lower end of one side of the same-end fixed block (3) and is provided with a water pump (7), the water pump (7) is fixedly connected with the movable base (2), the water pumping end of the water pump (7) is connected with the water storage tank (6), the water outlet end of the water pump (7) is fixedly provided with a diversion hose (8), the diversion hose (8) extends to the top end position of the inner side of the fixed frame (1) and is provided with a swinging rod (9), one end of the swinging rod (9) extends to the inner side of the fixed frame (1), the swinging rod (9) is rotationally connected with the fixed frame (1), the position of the inner side top of the fixed frame (1) is provided with a plurality of evenly fixed spray nozzles (10), and the plurality of spray nozzles (11) are fixedly connected with the fixed through the swinging rods (11).

3. The dust fall device according to claim 2, characterized in that the swing assembly comprises a first motor (12), the first motor (12) is arranged at the inner side of the fixed frame (1) and at the position corresponding to the swing rod (9), the first motor (12) is fixedly connected with the fixed frame (1), the output end of the first motor (12) is fixedly provided with a driving rod (13), one end of the driving rod (13) far away from the first motor (12) is vertically provided with a moving frame (15), the moving frame (15) is in sliding connection with the fixed frame (1), the inner side of the moving frame (15) is in sliding connection with a connecting sliding block (14), the connecting sliding block (14) is fixedly connected with the driving rod (13), one side of the moving frame (15) far away from the first motor (12) is longitudinally provided with a moving block (16), the moving block (16) is fixedly connected with the moving frame (15), the top end of the moving block (16) is fixedly provided with a moving rack (19), the inner side of the moving frame (9) is in sliding connection with a swing gear (18), and the inner side of the moving frame (9) is in sliding connection with the swing gear (18).

4. A dust settling device according to claim 3, characterized in that a limit slider (17) is longitudinally arranged on the side of the moving block (16) away from the moving frame (15), the limit slider (17) is fixedly connected with the moving block (16), and the limit slider (17) is slidingly connected with the fixed frame (1).

5. The dust settling device according to claim 1, wherein the lifting assembly (5) comprises a screw (22), the screw (22) is vertically arranged at the middle position of the inner side of the fixed block (3), the screw (22) is rotationally connected with the fixed block (3), a built-in threaded rod (21) is in threaded connection with the outer side of the top end of the screw (22), the built-in threaded rod (21) is in sliding connection with the fixed block (3), the top end of the built-in threaded rod (21) is fixedly connected with the fixed frame (1), and a driving assembly is arranged at the position corresponding to the screw (22) at the lower end of the fixed block (3).

6. The dust settling device according to claim 5, wherein the driving assembly comprises a casing (23), the casing (23) is arranged at the lower end of the fixed block (3) and at a position corresponding to the screw rod (22), the casing (23) is fixedly connected with the fixed block (3), a second motor (24) is arranged at the inner side of the casing (23), the second motor (24) is fixedly connected with the movable base (2), the output end of the second motor (24) extends to the inner side of the fixed block (3), a transmission bevel gear (25) is fixed at the output end of the second motor (24), a driven bevel gear (26) is fixed at the position corresponding to the screw rod (22), and the transmission bevel gear (25) is meshed and connected with the driven bevel gear (26).

7. The dust fall device according to claim 1, wherein the lifting assembly (5) further comprises a supporting rod (27), the two ends of the fixed block (3) are vertically provided with the supporting rod (27), the supporting rod (27) is in sliding connection with the fixed block (3), the top end of the supporting rod (27) is fixedly connected with the fixed frame (1), the two sides of the lower end of the supporting rod (27) are fixedly provided with anti-falling blocks (20), and the anti-falling blocks (20) are in sliding connection with the fixed block (3).