CN214638048U

CN214638048U - Dustproof high efficiency screening sand device for building

Info

Publication number: CN214638048U
Application number: CN202023224290.8U
Authority: CN
Inventors: 刘玉
Original assignee: Shanghai Xinjun Construction Development Co ltd
Current assignee: Shanghai Xinjun Construction Development Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-09
Anticipated expiration: 2030-12-29

Abstract

The utility model discloses A dustproof high-efficiency sand screening device for buildings, which comprises A sand screening barrel, wherein A bearing is fixedly embedded in one side wall of the sand screening barrel, A first sealing ring is fixedly embedded in one side wall of the sand screening barrel through glue, the side wall of the first sealing ring is attached to the side wall of the bearing, the other end of A transverse pipe sequentially passes through the first sealing ring and the bearing, the transverse pipe is rotatably connected with the first sealing ring, the other end of A second T-shaped sliding rod passes through A limiting ring and is fixedly connected with A trapezoidal block, the trapezoidal block is in A right trapezoid shape, A spring is arranged in A sliding groove, the spring is A compression spring, the second barrel body is made of A polyvinyl chloride material, the model of A PLC controller is CPM1A-10CDR-A-V1, the effective classification of sands with different grain diameters can be realized, the quality of the sands is improved, the collection of the dusts can be realized while the large-grain-diameter sands are discharged, the operation is convenient, and the generation of the dust flying phenomenon can be reduced, the working efficiency is improved while the health of workers is protected, and the use requirement of the building is met.

Description

Dustproof high efficiency screening sand device for building

Technical Field

The utility model relates to a building field, concretely relates to dustproof high efficiency screening sand device for building.

Background

The building is a general term of buildings and structures, and is an artificial environment created by using a grasped material technical means and applying certain scientific laws, wind and water concepts and aesthetic rules to meet the needs of social life. The building is people with earth, the brick, the tile, the stone material, the space that supplies people to live in and use that building material such as timber constitutes, can use the sand that many particle diameters are different at the construction process, these sands often will screen through screening sand device before using, traditional screening sand device structure is complicated, the function is single, the practicality is poor, can not garrulous sand carries out effectual classification, it is relatively poor to lead to the not sand quality of the different types of screening department, and big particle diameter sand discharges inconveniently, screening sand in-process dust flies in a confused state of mind, influence the staff healthy, be not convenient for construction operation, can not satisfy the building user demand.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the existence, the utility model provides a dustproof high efficiency screening sand device for building.

The utility model discloses a realize through following technical scheme:

a dustproof high-efficiency sand screening device for buildings comprises a sand screening barrel, wherein the top surface of the sand screening barrel is fixedly communicated with a feeding funnel, the side wall of the bottom end of the sand screening barrel is symmetrically and fixedly connected with a plurality of supporting legs, the inner side wall of the sand screening barrel is provided with an inclined plate in an attaching manner, the top surface of the inclined plate is fixedly embedded with a first screen, the side wall of the sand screening barrel is fixedly embedded with a second screen, the side wall of the sand screening barrel is fixedly connected with a discharging funnel, the discharging funnel is arranged below the second screen, the bottom surface of the inclined plate is fixedly connected with a first balancing weight, the section of the first balancing weight is fan-shaped, the two side walls of the first balancing weight are attached to the inner side wall of the sand screening barrel, one side of the bottom surface of the first balancing weight is provided with a first groove, the top surface of the inclined plate is fixedly connected with a second balancing weight, the section of the second balancing weight is fan-shaped, and the two side walls of the second balancing weight are attached to the inner side wall of the sand screening barrel, the weight of the second balancing weight is heavier than that of the first balancing weight, one side of the top end of the second balancing weight is provided with a second groove, a third screen is arranged in the second groove, the third screen is fixedly connected with the second balancing weight, a discharge hole is arranged under the sand sieving barrel, the side wall of the sand sieving barrel is provided with a through hole, the cross section of the through hole is square, the side wall of the inclined plate is fixedly provided with a transverse pipe, one end of the transverse pipe penetrates through the inner side wall of the sand sieving barrel through the inclined plate, the transverse pipe is rotatably connected with the sand sieving barrel, a vertical pipe is fixedly embedded in the first balancing weight, the bottom end of the vertical pipe is fixedly communicated with the top surface of the transverse pipe, the top end of the vertical pipe penetrates through the first balancing weight and is communicated with the first groove, the top end of the vertical pipe is fixedly embedded with a filter screen, one side wall of the sand sieving barrel is fixedly embedded with a bearing, and one side wall of the sand sieving barrel is fixedly embedded with a first sealing ring through glue, the lateral wall of the first sealing ring is attached to the lateral wall of the bearing, the other end of the transverse pipe sequentially penetrates through the first sealing ring and the bearing, the transverse pipe is rotationally connected with the first sealing ring, the transverse pipe is fixedly connected with the inner ring of the bearing, the other end of the transverse pipe is fixedly sleeved with the first gear, the lateral wall of the sand sieving barrel is fixedly connected with a U-shaped plate, the opening of the U-shaped plate faces to the side end, the inner bottom surface of the U-shaped plate is fixedly connected with a motor, the inner bottom surface of the U-shaped plate is fixedly connected with a PLC (programmable logic controller) which is electrically connected with the motor through a circuit, the output end of the motor is fixedly connected with a second toothed ring which is meshed with the first gear, the top surface of the motor is fixedly connected with a first barrel body, the inner wall of the first barrel body is fixedly embedded with a second sealing ring through glue, the other end of the transverse pipe penetrates into the first barrel body, and the surface of the transverse pipe is attached to the inner side wall of the second sealing ring, the dust collection fan is fixedly connected with the side wall of the U-shaped plate vertical plate, the dust collection fan is electrically connected with the PLC through a circuit, the input end of the dust collection fan penetrates into and is fixedly connected with the first barrel, the transverse pipe is rotatably connected with the first barrel, the side wall of the sand screening barrel is fixedly connected with the second barrel, a first T-shaped sliding rod is arranged in the second barrel in a fitting sliding manner, a transverse rod of the first T-shaped sliding rod penetrates into the through hole, one end of the transverse rod of the first T-shaped sliding rod is arc-shaped, two electromagnetic plates are symmetrically arranged in the second barrel, one electromagnetic plate side wall is fixedly connected with the inner side wall of the second barrel, the other electromagnetic plate side wall is fixedly connected with the side wall of the first T-shaped sliding rod vertical rod, the cross section of the first T-shaped sliding rod is square, the magnetic poles of the two electromagnetic plates are the same, the electromagnetic plates are electrically connected with the PLC through a circuit, and the inclined plate side wall is fixedly connected with a transverse plate, the sand screening device comprises a transverse plate, a transverse plate and a sand screening barrel, and is characterized in that the other end of the transverse plate is attached to the inner side wall of the sand screening barrel, a sliding groove is formed in the side wall of the transverse plate, a limiting ring is arranged in the sliding groove and fixedly connected with the transverse plate, a second T-shaped sliding rod is arranged in the sliding groove in a sliding mode in an attaching mode, the cross section of the second T-shaped sliding rod is square, the other end of the second T-shaped sliding rod penetrates through a trapezoidal block fixedly connected with the limiting ring, the shape of the trapezoidal block is a right trapezoid, a spring is arranged in the sliding groove, and the spring is a compression spring.

Preferably, the second barrel body is made of polyvinyl chloride materials.

Preferably, the PLC controller is of the type CPM1A-10 CDR-A-V1.

Compared with the prior art, the beneficial effects of the utility model are that: this device simple structure, the function is various, therefore, the clothes hanger is strong in practicability, through setting up the swash plate, first screen cloth, the second screen cloth, ejection of compact funnel, first balancing weight, the second balancing weight, the third screen cloth, violently the pipe, the standpipe, the filter screen, a bearing, first sealing washer, first gear, the U-shaped board, including a motor, an end cap, a controller, and a cover plate, the effectual classification of carrying out of different particle size sands can be realized to PLC controller and second ring gear, improve the quality of sand, and set up first staving, the second sealing washer, the dust absorption fan, the second staving, first T shape slide bar, the electromagnetic plate, a spring, the diaphragm, the spacing ring, second T shape slide bar and trapezoidal piece are collected the dust when can realize that large particle size sand is discharged, and convenient for operation, reduce the emergence of the indiscriminate phenomenon of flying of dust, improve work efficiency when protection staff's health, satisfy building user demand.

Drawings

FIG. 1 is a block diagram of the structure of the present invention;

fig. 2 is a left side view of the structure of the present invention;

fig. 3 is a schematic view of the structure of the present invention.

In the figure: the device comprises a sand screening barrel 1, a feeding funnel 2, an inclined plate 3, a first screen 4, a second screen 5, a discharging funnel 6, a first balancing weight 7, a second balancing weight 8, a third screen 9, a transverse pipe 10, a vertical pipe 11, a filter screen 12, a bearing 13, a first sealing ring 14, a first gear 15, a U-shaped plate 16, a motor 17, a PLC (programmable logic controller) 18, a second gear ring 19, a first barrel body 20, a second sealing ring 21, a dust collection fan 22, a second barrel body 23, a first T-shaped sliding rod 24, an electromagnetic plate 25, a spring 26, a transverse plate 27, a limiting ring 28, a second T-shaped sliding rod 29, a trapezoidal block 30, a discharging hole 1-1, a through hole 1-2, a first groove 7-1, a second groove 8-1 and a sliding groove 27-1.

Detailed Description

The invention will be described in further detail with reference to the following detailed description and accompanying drawings:

as shown in figures 1, 2 and 3, the dustproof high-efficiency sand sieving device for the building comprises a sand sieving barrel 1, wherein the top surface of the sand sieving barrel 1 is fixedly communicated with a feeding funnel 2, the side wall of the bottom end of the sand sieving barrel 1 is symmetrically and fixedly connected with a plurality of supporting legs, the inner side wall of the sand sieving barrel 1 is provided with an inclined plate 3 in an attaching manner, the top surface of the inclined plate 3 is fixedly embedded with a first screen 4, the side wall of the sand sieving barrel 1 is fixedly embedded with a second screen 5, the side wall of the sand sieving barrel 1 is fixedly connected with a discharging funnel 6, the discharging funnel 6 is arranged below the second screen 5 in an inclined manner, the bottom surface of the inclined plate 3 is fixedly connected with a first balancing weight 7, the section of the first balancing weight 7 is fan-shaped, the two side walls of the first balancing weight 7 are attached to the inner side wall of the sand sieving barrel 1, one side of the bottom surface of the first balancing weight 7 is provided with a first groove 7-1, the top surface of the inclined plate 3 is fixedly connected with a second balancing weight 8, the section of the second balancing weight 8 is fan-shaped, the two side walls of the second balancing weight 8 are attached to the inner side wall of the sand sieving barrel 1, the weight of the second balancing weight 8 is heavier than that of the first balancing weight 7, one side of the top end of the second balancing weight 8 is provided with a second groove 8-1, a third screen 9 is arranged in the second groove 8-1, the third screen 9 is fixedly connected with the second balancing weight 8, a discharge hole 1-1 is arranged right below the sand sieving barrel 1, the side wall of the sand sieving barrel 1 is provided with a through hole 1-2, the section of the through hole 1-2 is square, the side wall of the inclined plate 3 is fixedly provided with a transverse pipe 10, one end of the transverse pipe 10 penetrates through the inclined plate 3 to penetrate into the inner side wall of the sand sieving barrel 1, the transverse pipe 10 is rotatably connected with the sand sieving barrel 1, a vertical pipe 11 is fixedly embedded in the first balancing weight 7, and the bottom end of the vertical pipe 11 is fixedly communicated with the top surface of the transverse pipe 10, the top end of the vertical pipe 11 penetrates through the first balancing weight 7 to be communicated with the first groove 7-1, a filter screen 12 is fixedly embedded at the top end of the vertical pipe 11, a bearing 13 is fixedly embedded in one side wall of the sand sieving barrel 1, a first sealing ring 14 is fixedly embedded in one side wall of the sand sieving barrel 1 through glue, the side wall of the first sealing ring 14 is attached to the side wall of the bearing 13, the other end of the transverse pipe 10 sequentially penetrates through the first sealing ring 14 and the bearing 13, the transverse pipe 10 is rotatably connected with the first sealing ring 14, the transverse pipe 10 is fixedly connected with the inner ring of the bearing 13, a first gear 15 is fixedly sleeved at the other end of the transverse pipe 10, a U-shaped plate 16 is fixedly connected to the side wall of the sand sieving barrel 1, the opening of the U-shaped plate 16 faces to the side end, a motor 17 is fixedly connected to the inner bottom surface of the U-shaped plate 16, and a PLC 18 is fixedly connected to the inner bottom surface of the U-shaped plate 16, the PLC controller 18 is electrically connected with a motor 17 through a circuit, the output end of the motor 17 is fixedly connected with a second gear ring 19, the second gear ring 19 is meshed with a first gear 15, the top surface of the motor 17 is fixedly connected with a first barrel body 20, the inner wall of the first barrel body 20 is fixedly embedded with a second sealing ring 21 through glue, the other end of the transverse pipe 10 penetrates into the first barrel body 20, the surface of the transverse pipe 10 is attached to the inner side wall of the second sealing ring 21, the vertical plate side wall of the U-shaped plate 16 is fixedly connected with a dust suction fan 22, the dust suction fan 22 is electrically connected with the PLC controller 18 through a circuit, the input end of the dust suction fan 22 penetrates into and is fixedly connected with the first barrel body 20, the transverse pipe 10 is rotatably connected with the first barrel body 20, the side wall of the sand screening barrel 1 is fixedly connected with a second barrel body 23, a first T-shaped sliding rod 24 is slidably arranged in the second barrel body 23 in a fitting manner, the cross bar of the first T-shaped slide bar 24 penetrates into the through hole 1-2, one end of the cross bar of the first T-shaped slide bar 24 is arc-shaped, two electromagnetic plates 25 are symmetrically arranged in the second barrel body 23, the side wall of one electromagnetic plate 25 is fixedly connected with the inner side wall of the second barrel body 23, the side wall of the other electromagnetic plate 25 is fixedly connected with the side wall of the vertical bar of the first T-shaped slide bar 24, the cross section of the first T-shaped slide bar 24 is square, the magnetic poles of the two electromagnetic plates 25 are the same, the electromagnetic plate 25 is electrically connected with the PLC 18 through a circuit, the side wall of the inclined plate 3 is fixedly connected with a transverse plate 27, the other end of the transverse plate 27 is attached to the inner side wall of the sand sieving barrel 1, the side wall of the transverse plate 27-1 is provided with a sliding groove 27-1, a limiting ring 28 is arranged in the sliding groove 27-1, the transverse plate 28 is fixedly connected with the transverse plate 27, and a second T-shaped slide bar 29 is arranged in the sliding groove 27-1, the cross section of the second T-shaped sliding rod 29 is square, the other end of the second T-shaped sliding rod 29 penetrates through a limiting ring 28 and is fixedly connected with a trapezoidal block 30, the trapezoidal block 30 is in a right-angle trapezoid shape, a spring 26 is arranged in the sliding groove 27-1, and the spring 26 is a compression spring.

The second barrel 23 is made of polyvinyl chloride.

The PLC controller 18 is of the type CPM1A-10 CDR-A-V1.

The working principle is as follows: when the sand screening device needs to be classified in building engineering, the device is connected with a power supply, the PLC 18 is operated to enable the electromagnetic plates 25, the motor 17 and the dust suction fan 22 to start working, the two electromagnetic plates 25 are electrified to generate mutual exclusion phenomenon, the output end of the motor 17 drives the second gear ring 19 to rotate in small amplitude, the second gear ring 19 drives the first gear 15 to rotate, the first gear 15 drives the transverse pipe 10 to rotate, the transverse pipe 10 drives the inclined plate 3 to rotate, the inclined plate 3 drives the first screen 4 to swing, the inclined plate 3 drives the first counterweight 7 to rotate, the inclined plate 3 drives the second counterweight 8 to rotate, the inclined plate 3 drives the transverse plate 27 to swing, then sand to be classified is added into the sand screening barrel 1 from the feeding funnel 2, the sand falls onto the inclined plate 3, large-particle sand is filtered above the first screen 4, other sand falls below the first screen 4 after being filtered by the first screen 4, middle-particle sand is filtered by the second screen 5 and discharged from the discharge hopper 6, small-particle sand is filtered by the third screen 9 and enters the second groove 8-1 and is discharged from the discharge hole 1-1, dust flies during the sand screening process, meanwhile, the dust suction fan 22 works, the dust in the sand screening barrel 1 sequentially enters the vertical pipe 11 through the first groove 7-1 and the filter screen 12, enters the first barrel body 20 through the transverse pipe 10 and then enters the dust suction fan 22, so that the dust collection is realized, the dust flying is reduced, as shown in figure 1, after the sand classification is finished, the PLC 18 is operated to stop the motor 17 and the electromagnetic plate 25, the two electromagnetic plates 25 are powered off, so that no mutual thrust exists between the electromagnetic plates 25, and at the moment, the total weight of the large-particle sand and the first balancing weight 7 is larger than the total weight of the second balancing weight 8, the large-particle sand drives the inclined plate 3 to rotate due to gravity, the inclined plate 3 drives the first balancing weight 7 and the second balancing weight 8 to rotate respectively, the first balancing weight 7 rotates continuously due to inertia, the inclined plate 3 drives the horizontal pipe 10 to rotate, the horizontal pipe 10 indirectly drives the output end of the motor 17 to rotate, friction generated in the motor 17 does not affect the work of the device, the inclined plate 3 drives the transverse plate 27 to rotate, the transverse plate 27 drives the second T-shaped sliding rod 29 to rotate, the second T-shaped sliding rod 29 drives the trapezoidal block 30 to rotate, when the trapezoidal block 30 rotates to be opposite to the through hole 1-2, the trapezoidal block 30 pushes the first T-shaped sliding rod 24 to move, the first T-shaped sliding rod 24 drives the electromagnetic plate 25 on the side wall to move to be close to the other electromagnetic plate 25, the spring 26 pushes the second T-shaped sliding rod 29 to move, the second T-shaped sliding rod 29 drives the trapezoidal block 30 to move to be inserted into the through hole 1-2, as shown in figure 3, at the moment, large-particle sand is discharged from the discharge hole 1-1 through the first groove 7-1, a receiving device is placed at the bottom end of the discharge hole 1-1 to receive the large-particle sand, after the large-particle sand is discharged, when the sand needs to be sieved again, the PLC 18 is operated to enable the electromagnetic plate 25 to work, mutual exclusion phenomenon occurs when the electromagnetic plate 25 is electrified, one electromagnetic plate 25 pushes the other electromagnetic plate 25 to move, the other electromagnetic plate 25 drives the first T-shaped slide bar 24 to move, the first T-shaped slide bar 24 pushes the trapezoidal block 30 to gradually slide out of the through hole 1-2, the trapezoidal block 30 gradually slides into the chute 27-1, the trapezoidal block 30 drives the second T-shaped slide bar 29 to move the extrusion spring 26, at the moment, the weight of the second balancing weight 8 is larger than that of the first balancing weight 7, the second balancing weight 8 drives the inclined plate 3 to rotate, the inclined plate 3 drives the first balancing weight 7 to rotate, after the second balancing weight 8 stops swinging, as shown in fig. 1, the PLC controller 18 is operated to enable the motor 17 to start working, sand screening is performed according to the above operation, after the sand screening is completed, the PLC controller 18 is operated to enable all electrical equipment of the device to stop working, then the device is separated from the power supply, the friction force between the sand screening barrel 1 and the transverse pipe 10 is reduced due to the arrangement of the bearing 13, the sealing performance of the device is ensured due to the arrangement of the first sealing ring 14 and the second sealing ring 21, and the sand is prevented from entering the vertical pipe 11 due to the arrangement of the filtering net 12.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a dustproof high efficiency screening sand device for building, includes screening sand bucket (1), the fixed intercommunication of screening sand bucket (1) top surface has feed hopper (2), a plurality of landing legs of screening sand bucket (1) bottom lateral wall symmetry fixedly connected with, its characterized in that: the inner side wall of the sand sieving barrel (1) is provided with an inclined plate (3) in a laminating manner, the top surface of the inclined plate (3) is fixedly embedded with a first screen (4), the side wall of the sand sieving barrel (1) is fixedly embedded with a second screen (5), the side wall of the sand sieving barrel (1) is fixedly connected with a discharge funnel (6), the discharge funnel (6) is arranged below the second screen (5) in an inclined manner, the bottom surface of the inclined plate (3) is fixedly connected with a first balancing weight (7), the cross section of the first balancing weight (7) is fan-shaped, the two side walls of the first balancing weight (7) are laminated with the inner side wall of the sand sieving barrel (1), one side of the bottom surface of the first balancing weight (7) is provided with a first groove (7-1), the top surface of the inclined plate (3) is fixedly connected with a second balancing weight (8), the cross section of the second balancing weight (8) is fan-shaped, the two side walls of the second balancing weight (8) are laminated with the inner side wall of the sand sieving barrel (1), the weight of the second balancing weight (8) is heavier than that of the first balancing weight (7), one side of the top end of the second balancing weight (8) is provided with a second groove (8-1), a third screen (9) is arranged in the second groove (8-1), the third screen (9) is fixedly connected with the second balancing weight (8), a discharge hole (1-1) is formed under the sand sieving barrel (1), the side wall of the sand sieving barrel (1) is provided with a through hole (1-2), the cross section of the through hole (1-2) is square, the side wall of the inclined plate (3) is fixedly provided with a transverse pipe (10), one end of the transverse pipe (10) penetrates through the inclined plate (3) to penetrate into the inner side wall of the sand sieving barrel (1), the transverse pipe (10) is rotatably connected with the sand sieving barrel (1), a vertical pipe (11) is fixedly embedded in the first balancing weight (7), and the bottom end of the vertical pipe (11) is fixedly communicated with the top surface of the transverse pipe (10), the top end of the vertical pipe (11) penetrates out of the first balancing weight (7) to be communicated with the first groove (7-1), a filter screen (12) is fixedly embedded into the top end of the vertical pipe (11), a bearing (13) is fixedly embedded into one side wall of the sand sieving barrel (1), a first sealing ring (14) is fixedly embedded into one side wall of the sand sieving barrel (1) through glue, the side wall of the first sealing ring (14) is attached to the side wall of the bearing (13), the other end of the transverse pipe (10) sequentially penetrates through the first sealing ring (14) and the bearing (13), the transverse pipe (10) is rotatably connected with the first sealing ring (14), the transverse pipe (10) is fixedly connected with the inner ring of the bearing (13), a first gear (15) is fixedly sleeved on the other end of the transverse pipe (10), a U-shaped plate (16) is fixedly connected with the side wall of the sand sieving barrel (1), and the opening of the U-shaped plate (16) faces the side end, the bottom surface is fixedly connected with a motor (17) in the U-shaped plate (16), the bottom surface is fixedly connected with a PLC controller (18) in the U-shaped plate (16), the PLC controller (18) is electrically connected with the motor (17) through a circuit, the output end of the motor (17) is fixedly connected with a second toothed ring (19), the second toothed ring (19) is meshed with a first gear (15), the top surface of the motor (17) is fixedly connected with a first barrel body (20), the inner wall of the first barrel body (20) is fixedly embedded with a second sealing ring (21) through glue, the other end of the transverse pipe (10) penetrates into the first barrel body (20), the surface of the transverse pipe (10) is attached to the inner side wall of the second sealing ring (21), the vertical wall of the U-shaped plate (16) is fixedly connected with a dust suction fan (22), and the dust suction fan (22) is electrically connected with the PLC controller (18) through a circuit, the dust collection fan (22) input penetrates into the first barrel body (20) and is fixedly connected with the first barrel body, the transverse pipe (10) is rotatably connected with the first barrel body (20), the side wall of the sand sieving barrel (1) is fixedly connected with the second barrel body (23), a first T-shaped sliding rod (24) is arranged in the second barrel body (23) in a fit sliding manner, a transverse rod of the first T-shaped sliding rod (24) penetrates into the through hole (1-2), one end of the transverse rod of the first T-shaped sliding rod (24) is arc-shaped, two electromagnetic plates (25) are symmetrically arranged in the second barrel body (23), a side wall of one electromagnetic plate (25) is fixedly connected with the inner side wall of the second barrel body (23), the side wall of the other electromagnetic plate (25) is fixedly connected with the side wall of the vertical rod of the first T-shaped sliding rod (24), the cross section of the first T-shaped sliding rod (24) is square, the magnetic poles of the two electromagnetic plates (25) are the same, and the electromagnetic plates (25) are electrically connected with the PLC (18) through a circuit, swash plate (3) lateral wall fixedly connected with diaphragm (27), the laminating of diaphragm (27) other end and sieve sand bucket (1) inside wall, diaphragm (27) lateral wall is opened there are spout (27-1), be equipped with spacing ring (28) in spout (27-1), spacing ring (28) and diaphragm (27) fixed connection, the laminating slides in spout (27-1) and is equipped with second T shape slide bar (29), second T shape slide bar (29) cross-section is square, spacing ring (28) fixedly connected with trapezoidal piece (30) is passed to second T shape slide bar (29) other end, trapezoidal piece (30) shape is right trapezoid, be equipped with spring (26) in spout (27-1), spring (26) are compression spring.

2. The dustproof high-efficiency sand screening device for buildings according to claim 1, which is characterized in that: the second barrel body (23) is made of polyvinyl chloride materials.

3. The dustproof high-efficiency sand screening device for buildings according to claim 1, which is characterized in that: the model of the PLC controller (18) is CPM1A-10 CDR-A-V1.