CN112191510A

CN112191510A - Screening plant for construction

Info

Publication number: CN112191510A
Application number: CN202011116111.0A
Authority: CN
Inventors: 黄爱玲
Original assignee: Anhui Libo Decoration Engineering Co ltd
Current assignee: Anhui Libo Decoration Engineering Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-01-08

Abstract

The invention relates to the technical field of building construction, in particular to a screening device for building construction. Including material loading conveyer belt, screening case, remove miscellaneous subassembly, dust fall subassembly, sieve stone subassembly and sand screening subassembly, the material loading conveyer belt is the slope and sets up the side at the screening case, remove the setting of miscellaneous subassembly on the screening case, the dust fall subassembly sets up on the screening case, the sieve stone subassembly sets up at the screening incasement, the sieve stone subassembly is located the below of dust fall subassembly, sand screening subassembly sets up at the screening incasement, sand screening subassembly is located the below of sieve stone subassembly. The invention can solve the technical problems that in the prior art, when sand and gravel are screened, impurities such as dried branches and leaves in the sand and gravel cannot be cleaned, when the sand and gravel are screened, dust can not be timely reduced, the ecological environment is damaged, the sand cannot be further screened, and various requirements in actual building construction cannot be met.

Description

Screening plant for construction

Technical Field

The invention relates to the technical field of building construction, in particular to a novel screening device for building construction.

Background

Building sand need sieve large-scale debris in the building sand when using, but the mode that sieves building sand now is the manual work and sieves, and screening efficiency is low, has reduced user's work efficiency, has wasted user's a large amount of time.

For example, patent application number CN201721590731.1 is with building sand screening plant, includes the casing, the equal fixedly connected with fixed plate in shells inner wall's both sides, the top sliding connection of fixed plate has the inner box, the horizontal fixedly connected with sieve in inside of inner box, the axis department intercommunication of inner box bottom has the discharging pipe, and the discharging pipe is located between two fixed plates, and shells inner wall's bottom is provided with the storage box, the right side fixedly connected with transmission case of casing. According to the building sand screening device, the shell, the fixing plate, the inner box, the screen plate, the discharging pipe, the containing box, the transmission box, the connecting rod, the first sliding rod, the motor, the rotary plate, the second sliding rod, the frame, the connecting plate and the movable groove are matched for use, so that the problem that the existing building sand screening mode is manual screening and low in screening efficiency is solved.

However, the above-mentioned devices also have the following problems in use: first, when screening the grit sand, can not clear up the withered tree branch in the grit sand, impurity such as leaf, the second is when screening the grit sand, can not in time carry out the dust fall work, causes the pollution to the environment, and the third can not carry out further screening to the sand, can not satisfy the various demands in the actual building construction.

Disclosure of Invention

The invention aims to provide a novel building gravel sand screening device, which solves the technical problems that in the prior art, impurities such as dried branches and leaves in gravel sand cannot be cleaned, dust can not be timely reduced, sand cannot be further screened, and various requirements in actual building construction cannot be met.

The invention provides a novel building sand and gravel screening device which comprises a feeding conveyor belt, a screening box, an impurity removal assembly, a dust removal assembly, a stone screening assembly and a sand screening assembly, wherein the screening box is vertically arranged, the feeding conveyor belt is obliquely arranged beside the screening box, the discharge end of the feeding conveyor belt is positioned at the top of the screening box and is in butt joint with the screening box, the impurity removal assembly is arranged on the screening box and is positioned at the upper part of the screening box, the dust removal assembly is arranged on the screening box, the output end of the dust removal assembly faces the interior of the screening box, the stone screening assembly is arranged in the screening box and is in sliding fit with the screening box, the stone screening assembly is positioned below the dust removal assembly, the sand screening assembly is arranged in the screening box and is in sliding fit with the screening box, and the sand screening assembly is positioned below the stone screening assembly.

Further, remove the miscellaneous subassembly and place board, fan motor, fan and one-level filter screen including gravel and sand collection mouth, impurity collecting box, motor, be equipped with a fan groove on the screening case, gravel and sand collection mouth sets up the top at the screening case, the impurity collecting box sets up on the lateral wall of screening case, the opposite side fixed connection of board and screening case is placed to the motor, fan motor places board fixed connection with the motor, the fan sets up in the fan groove and is connected with fan motor's spindle drive, one-level filter screen level set up in the screening case and with screening case fixed connection.

Further, the dust fall subassembly is including depositing water pipe, inlet tube and four spray pipes, deposit the water pipe setting on the lateral wall of screening case and with screening case fixed connection, inlet tube and deposit water pipe fixed connection, four the equidistant setting of spray pipe is on the screening case, four the water spray end of spray pipe all faces the screening incasement, every the spray pipe all with deposit water pipe fixed connection.

Furthermore, a second-stage filter screen plate is arranged in the screening box and horizontally arranged above the plurality of water spraying pipes.

Furthermore, the gravel and sand assembly comprises a gravel and sand collecting port, an underframe, a fixing frame, a suspension device, a damping spring device, a screen mesh, a screen box, a double-shaft vibration motor, two fixing plates, two fixing rods and two semicircular plates, wherein the gravel and sand collecting port is arranged beside the screen box, the underframe is arranged in the screen box and fixedly connected with the screen box, the two fixing plates are symmetrically arranged at the top of the underframe, the fixing frame is arranged at the top of the underframe and connected with the two fixing plates through the suspension device, the screen box is connected in the fixing frame through the damping spring device, the double-shaft vibration motor is arranged in the screen box and fixedly connected with the screen box, the two semicircular plates are respectively arranged at two sides of the screen box and are in transmission connection with two main shafts of the double-shaft vibration motor, the two semicircular plates are in sliding fit with the underframe, the two fixing rods are vertically arranged at the top of the screen box, the screen cloth level sets up the top at two dead levers, the lateral wall sliding fit of screen cloth and screening case, linkage's one end and mount fixed connection, linkage's the other end and two fixed plate sliding fit, damping spring device's one end and screening case sliding fit, damping spring device's the other end and mount fixed connection.

Furthermore, the sand screening component comprises a coarse sand collecting port, a base, a motor fixing block, a rotating motor, a first connecting seat, a first connecting rod, a second connecting seat, a second connecting rod, a connecting shaft, a supporting plate, a vibrating screen, two rotating seats and two vibrating springs, wherein the coarse sand collecting port is arranged beside the screening box, the base is horizontally arranged on the inner side wall of the screening box, the motor fixing block is arranged on the base and fixedly connected with the base, the rotating motor is arranged on the motor fixing block, the first connecting seat and the second connecting seat are symmetrically arranged at the top of the base, the first connecting rod and the second connecting rod are respectively and rotatably connected with the first connecting seat and the second connecting seat, one end of the first connecting rod is fixedly connected with a main shaft of the rotating motor, and the two rotating seats are respectively arranged on the first connecting rod and the second connecting rod, the connecting shaft is fixedly connected with the two rotating fixed seats, the vibrating screen is horizontally arranged on the screening box and is in sliding fit with the screening box, the bottom of the supporting plate is fixedly connected with the connecting shaft, the top of the supporting plate is rotatably connected with the bottom of the vibrating screen, and two ends of the vibrating spring are respectively connected with the first connecting seat, the second connecting seat and the bottom of the vibrating screen.

Furthermore, the lower part of the screening box is provided with a blanking plate which is obliquely arranged below the base, the side wall of the screening box is provided with a fine sand collecting port, and the blanking plate is butted with the fine sand collecting port.

Furthermore, arc-shaped sand falling plates are arranged on the vibrating screen and the screen.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the gravel and sand collection port can prevent the gravel and sand from overflowing out of the screening box in the process of falling down, when the gravel and sand are conveyed to the screening box by the feeding conveyor belt, the impurity removal assembly performs first-step screening, at the moment, the fan motor rotates, the fan in transmission connection with the fan motor also starts to rotate in the fan groove, impurities such as dead branches and leaves in the gravel and sand are blown into the impurity collection box, and the remaining gravel and sand are filtered into the working range of the next working procedure through the primary filter screen to perform primary screening work on the gravel and sand.

Secondly, the sand and stones of the invention reach the working area of the dust-fall component from top to bottom, the water inlet pipe starts to store water in the water storage pipe, the four water spray pipes spray water onto the sand and stones to spray the sand and stones, and the dust-fall treatment is carried out on the sand and stones, so that the pollution to the working environment caused by the generation of a large amount of dust in the process of screening the sand and stones is prevented.

Thirdly, when sand enters the working area of the sand screening assembly, the rotating motor rotates to drive the first connecting rod to rotate on the first connecting seat, so that the second connecting rod is driven to rotate on the second connecting seat through the connecting shaft and the two rotating seats, the connecting shaft rotates to drive the supporting plate to rotate so as to drive the vibrating screen to vibrate on the screening box, coarse sand and fine sand in the sand and the stone are screened and filtered, the screened coarse sand is discharged outwards through the coarse sand collecting port, the fine sand falls downwards, and the fine sand in the sand and the stone can be filtered and screened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a partial perspective view of the first embodiment of the present invention;

FIG. 3 is a partial perspective view of the second embodiment of the present invention;

FIG. 4 is a third schematic view of a partial perspective structure of the present invention;

FIG. 5 is a schematic perspective view of the sieve assembly of the present invention;

FIG. 6 is a schematic illustration of a perspective view of a sand screen assembly of the present invention;

reference numerals: the device comprises a feeding conveyor belt 1, a screening box 2, a secondary filter screen plate 21, an impurity removing component 3, a sand and stone collecting port 31, an impurity collecting box 32, a motor placing plate 33, a fan motor 34, a fan 35, a primary filter screen 36, a dust falling component 4, a water storage pipe 41, a water inlet pipe 42, a water spray pipe 43, a sieve stone component 5, a sand and stone collecting port 51, a bottom frame 52, a fixing frame 521, a suspension device 53, a damping spring device 54, a screen 55, a screen box 56, a double-shaft vibration motor 57, a fixing plate 571, a fixing rod 58, a semi-circular plate 59, a screening component 6, a coarse sand collecting port 61, a base 62, a motor fixing block 621, a rotating motor 63, a first connecting seat 64, a first connecting rod 641, a second connecting seat 65, a second connecting rod 651, a connecting shaft 66, a supporting plate 661, a vibration screen 67, a rotating seat 68, a vibration spring 69, a fine sand collecting.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, the embodiment of the invention provides a novel building sand and gravel screening device, which comprises a feeding conveyor belt 1, a screening box 2, an impurity removing assembly 3, a dust falling assembly 4, a stone screening assembly 5 and a sand screening assembly 6, wherein the screening box 2 is arranged vertically, the feeding conveyor belt 1 is obliquely arranged at the side of the screening box 2, the discharge end of the feeding conveyor belt 1 is positioned at the top of the screening box 2 and is in butt joint with the screening box 2, the impurity removing assembly 3 is arranged on the screening box 2 and is positioned at the upper part of the screening box 2, the dust falling assembly 4 is arranged on the screening box 2, the output end of the dust falling assembly 4 faces the screening box 2, the stone screening assembly 5 is arranged in the screening box 2 and is in sliding fit with the screening box 2, the stone screening assembly 5 is positioned below the dust falling assembly 4, the sand screening assembly 6 is arranged in the screening box 2 and is in sliding fit with the screening box 2, the sand screening assembly 6 is located below the stone screening assembly 5.

The impurity removing assembly 3 comprises a sand and stone collecting port 31, an impurity collecting box 32, a motor placing plate 33, a fan motor 34, a fan 35 and a primary filter screen 36, wherein a fan groove is formed in the screening box 2, the sand and stone collecting port 31 is arranged at the top of the screening box 2, the impurity collecting box 32 is arranged on the side wall of the screening box 2, the motor placing plate 33 is fixedly connected with the other side of the screening box 2, the fan motor 34 is fixedly connected with the motor placing plate 33, the fan 35 is arranged in the fan groove and is in transmission connection with a spindle of the fan motor 34, and the primary filter screen 36 is horizontally arranged in the screening box 2 and is fixedly connected with the screening box 2; mouth 31 can prevent that gravel and sand from collecting to the in-process of whereabouts, gravel and sand spills over outside screening case 2, when gravel and sand transported the screening case 2 by material loading conveyer belt 1 in, carry out first step screening by removing miscellaneous subassembly 3, fan motor 34 rotates this moment, fan 35 who is connected with fan motor 34 transmission also begins at the fan inslot internal rotation, blow impurity collecting box 32 with withered branch in the gravel and sand, impurity such as leaf, and remaining gravel and sand filters to next process working range in through one-level filter screen 36, carry out preliminary screening work to gravel and sand.

The dust fall assembly 4 comprises a water storage pipe 41, a water inlet pipe 42 and four water spray pipes 43, the water storage pipe 41 is arranged on the side wall of the screening box 2 and is fixedly connected with the screening box 2, the water inlet pipe 42 is fixedly connected with the water storage pipe 41, the four water spray pipes 43 are arranged on the screening box 2 at equal intervals, the water spray ends of the four water spray pipes 43 face the inside of the screening box 2, and each water spray pipe 43 is fixedly connected with the water storage pipe 41; when the sand and stone reach the working area of the dust fall component 4 from top to bottom, the water inlet pipe 42 starts to store water in the water storage pipe 41, the four water spray pipes 43 spray water onto the sand and stone to spray the sand and stone, and the sand and stone are subjected to dust fall treatment, so that the phenomenon that a large amount of dust is generated in the process of screening the sand and stone, and the pollution to the working environment is avoided.

A secondary filter screen plate 21 is arranged in the screening box 2, and the secondary filter screen plate 21 is horizontally arranged above the plurality of spray pipes 43; when the sand and stone are sprayed for dust fall, the secondary filter screen plate 21 can slow down the falling speed of the sand and stone, and the dust fall effect is facilitated.

The gravel assembly 5 comprises a gravel collecting port 51, a bottom frame 52, a fixing frame 521, a suspension device 53, a damping spring device 54, a screen 55, a screen box 56, a double-shaft vibration motor 57, two fixing plates 571, two fixing rods 58 and two semicircular plates 59, the gravel collecting port 31 is arranged at the side of the screen box 2, the bottom frame 52 is arranged in the screen box 2 and fixedly connected with the screen box 2, the two fixing plates 571 are symmetrically arranged at the top of the bottom frame 52, the fixing frame 521 is arranged at the top of the bottom frame 52 and connected with the two fixing plates 571 through the suspension device 53, the screen box 56 is connected in the fixing frame 521 through the damping spring device 54, the double-shaft vibration motor 57 is arranged in the screen box 56 and fixedly connected with the screen box 56, the two semicircular plates are respectively arranged at two sides of the screen box 56 and are in transmission connection with two main shafts of the double-shaft vibration motor 57, the two semicircular plates are in sliding fit with the bottom frame 52, the two fixing rods are vertically arranged at the top of the screen box 56, the screen 55 is horizontally arranged at the top of the two fixing rods 58, the screen 55 is in sliding fit with the side wall of the screening box 2, one end of the suspension device 53 is fixedly connected with the fixing frame 521, the other end of the suspension device 53 is in sliding fit with the two fixing plates 571, one end of the damping spring device 54 is in sliding fit with the screen box 56, and the other end of the damping spring device 54 is fixedly connected with the fixing frame 521; when gravel and sand get into the work area of sieve stone subassembly 5 in, fixed connection starts to rotate at the biax vibrating motor 57 in sieve case 56, biax vibrating motor 57 work drives two semicircle boards 59 and rotates on chassis 52, thereby it shakes from top to bottom to drive sieve case 56 through linkage 53 and damping spring device 54, sieve case 56 produces vibrations and drives two dead levers 58 vibrations and thereby drive screen cloth 55 and produce vibrations on screening case 2, screen cloth 55 produces vibrations and screens the operation to the gravel and sand that falls down, screen the stone in the sieve stone and filter, stay the stone on screen cloth 55 because the existence of vibrations can collect mouthful 31 with it outside discharge through gravel and sand, the sand that will accord with the standard passes through screen cloth 55 and drops downwards on to sand screening subassembly 6, accomplish the screening operation to the stone in the gravel and sand.

The sand screening component 6 comprises a coarse sand collecting port 61, a base 62, a motor fixing block 621, a rotary motor 63, a first connecting seat 64, a first connecting rod 641, a second connecting seat 65, a second connecting rod 651, a connecting shaft 66, a supporting plate 661, a vibrating screen 67, two rotary seats 68 and two vibrating springs 69, wherein the coarse sand collecting port 61 is arranged at the side of the screening box 2, the base 62 is horizontally arranged on the inner side wall of the screening box 2, the motor fixing block 621 is arranged on the base 62 and fixedly connected with the base 62, the rotary motor 63 is arranged on the motor fixing block 621, the first connecting seat 64 and the second connecting seat 65 are symmetrically arranged at the top of the base 62, the first connecting rod 641 and the second connecting rod 651 are respectively and rotatably connected with the first connecting seat 64 and the second connecting seat 65, one end of the first connecting rod 641 is fixedly connected with a main shaft of the rotary motor 63, the two rotating seats are respectively arranged on the first connecting rod 641 and the second connecting rod 651, the connecting shaft 66 is fixedly connected with the two rotating fixed seats, the vibrating screen 67 is horizontally arranged on the screening box 2 and is in sliding fit with the screening box 2, the bottom of the supporting plate 661 is fixedly connected with the connecting shaft 66, the top of the supporting plate 661 is rotatably connected with the bottom of the vibrating screen 67, and two ends of each vibrating spring 69 are respectively connected with the first connecting seat 64, the second connecting seat 65 and the bottom of the vibrating screen 67; in the work area that sand got into sand screening subassembly 6, it rotates to rotate motor 63 and drives first connecting rod 641 and rotate on first connecting seat 64, thereby it rotates to drive second connecting rod 651 and rotate on second connecting seat 65 through connecting axle 66 and two, connecting axle 66 rotates and drives backup pad 661 rotation and drive shale shaker 67 and produce vibrations on screening case 2, coarse sand and fine sand to the gravel and sand in the gravel and sand filter, the coarse sand of selecting is collected mouthful 61 through coarse sand and is outwards discharged, fine sand drops downwards, can realize filtration and screening to fine sand and coarse sand in the gravel and sand.

A blanking plate 71 which is obliquely arranged is arranged below the base 62 at the lower part of the screening box 2, a fine sand collecting port 7 is arranged on the side wall of the screening box 2, and the blanking plate 71 is butted with the fine sand collecting port 7; the fine sand is collected by the blanking plate 71 after being filtered and discharged to the outside through the fine sand collecting port 7 after being collected.

The vibrating screen 67 and the screen 55 are both provided with an arc-shaped sand falling plate 8; the provision of the curved sand fall plate 8 allows sand falling on the vibrating screen 67 and the screen 55 to be moved sideways and prevents the sand from moving downwards from a central position to affect the screen assembly 5 and the sand screen assembly 6.

The working principle is as follows: the sand and stone collecting port 31 can prevent sand and stone from overflowing to the outside of the screening box 2 in the falling process, when the sand and stone is conveyed to the screening box 2 by the feeding conveyor belt 1, the impurity removing component 3 carries out first-step screening, at the moment, the fan motor 34 rotates, the fan 35 in transmission connection with the fan motor 34 also starts to rotate in the fan groove, impurities such as withered branches and leaves in the sand and stone are blown to the impurity collecting box 32, the remaining sand and stone is filtered to the working range of the next working procedure through the primary filter screen 36, the sand and stone are primarily screened, when the sand and stone reach the working area of the dust-settling component 4 from top to bottom, the water inlet pipe 42 starts to store water in the water storage pipe 41, the four water spray pipes 43 spray the water on the sand and stone to carry out spraying work on the sand and stone, the dust-settling treatment is carried out on the sand and stone, and a large amount of dust is prevented from being generated in the process of screening the, the secondary filter screen plate 21 is horizontally arranged above the plurality of water spray pipes 43, when sand and stones are sprayed and dusted, the secondary filter screen plate 21 can slow down the falling speed of the sand and stones, and is beneficial to the dusted effect, when the sand and stones enter the working area of the sieve stone assembly 5, the double-shaft vibrating motor 57 fixedly connected in the sieve box 56 starts to rotate, the double-shaft vibrating motor 57 drives the two semi-circular plates 59 to rotate on the bottom frame 52, so as to drive the sieve box 56 to vibrate up and down through the hanging device 53 and the damping spring device 54, the sieve box 56 generates vibration to drive the two fixing rods 58 to vibrate, so as to drive the sieve mesh 55 to generate vibration on the sieve box 2, the sieve mesh 55 generates vibration to carry out the sieving operation on the falling sand and stones, the stones in the sieve mesh are sieved and filtered, the stones are left on the sieve mesh 55 and can be discharged outwards through the sand and stone collecting port 31 due to the existence of the vibration, the sand meeting the standard is downwards dropped onto the sand screening component 6 through the screen 55 to complete the screening operation of stones in the sand, when the sand enters the working area of the sand screening component 6, the rotating motor 63 rotates to drive the first connecting rod 641 to rotate on the first connecting seat 64, so as to drive the second connecting rod 651 to rotate on the second connecting seat 65 through the connecting shaft 66 and the two rotating seats 68, the connecting shaft 66 rotates to drive the supporting plate 661 to rotate so as to drive the vibrating screen 67 to vibrate on the screening box 2, the coarse sand and the fine sand in the sand are screened and filtered, the screened coarse sand is outwards discharged through the coarse sand collecting port 61, the fine sand is downwards dropped, the fine sand and the coarse sand in the sand can be filtered and screened, the fine sand is collected through the blanking plate 71 after being filtered, the fine sand is outwards discharged through the fine sand collecting port 7 after being collected, the provision of the curved sand fall plate 8 allows sand falling on the vibrating screen 67 and the screen 55 to be moved sideways and prevents the sand from moving downwards from a central position to affect the screen assembly 5 and the sand screen assembly 6.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The screening device for building construction is characterized by comprising a feeding conveyor belt (1), a screening box (2), an impurity removal assembly (3), a dust fall assembly (4), a sieve stone assembly (5) and a sand screening assembly (6), wherein the screening box (2) is vertically arranged, the feeding conveyor belt (1) is obliquely arranged beside the screening box (2), the discharge end of the feeding conveyor belt (1) is positioned at the top of the screening box (2) and is in butt joint with the screening box (2), the impurity removal assembly (3) is arranged on the screening box (2) and is positioned at the upper part of the screening box (2), the dust fall assembly (4) is arranged on the screening box (2) and the output end of the dust fall assembly (4) faces towards the interior of the screening box (2), the sieve stone assembly (5) is arranged in the screening box (2) and is in sliding fit with the screening box (2), and the sieve stone assembly (5) is positioned below the dust fall assembly (4), the sand screening assembly (6) is arranged in the screening box (2) and is in sliding fit with the screening box (2), and the sand screening assembly (6) is located below the sieve stone assembly (5).

2. The screening device for building construction according to claim 1, wherein: remove miscellaneous subassembly (3) and place board (33), fan motor (34), fan (35) and one-level filter screen (36) including gravel and sand collection mouth (31), impurity collection box (32), motor, be equipped with a fan groove on screening case (2), gravel and sand collection mouth (31) set up the top at screening case (2), impurity collection box (32) set up on the lateral wall of screening case (2), the motor is placed board (33) and the opposite side fixed connection of screening case (2), board (33) fixed connection is placed with the motor in fan motor (34), fan motor (35) set up in the fan groove and are connected with the spindle drive of fan motor (34), one-level filter screen (36) level set up in screening case (2) and with screening case (2) fixed connection.

3. The screening device for building construction according to claim 1, wherein: dust fall subassembly (4) are including deposit water pipe (41), inlet tube (42) and four spray pipes (43), deposit water pipe (41) set up on the lateral wall of screening case (2) and with screening case (2) fixed connection, inlet tube (42) and deposit water pipe (41) fixed connection, four spray pipe (43) equidistant setting is on screening case (2), four the water spray end of spray pipe (43) all is towards in screening case (2), every spray pipe (43) all with deposit water pipe (41) fixed connection.

4. The screening device for building construction according to claim 3, wherein: a secondary filter screen plate (21) is arranged in the screening box (2), and the secondary filter screen plate (21) is horizontally arranged above the plurality of water spraying pipes (43).

5. The screening device for building construction according to claim 1, wherein: the screening stone component (5) comprises a sand collecting port (51), a bottom frame (52), a fixing frame (521), a hanging device (53), a damping spring device (54), a screen (55), a screen box (56), a double-shaft vibration motor (57), two fixing plates (571), two fixing rods (58) and two semicircular plates (59), the sand collecting port (31) is arranged at the side of the screening box (2), the bottom frame (52) is arranged in the screening box (2) and fixedly connected with the screening box (2), the two fixing plates (571) are symmetrically arranged at the top of the bottom frame (52), the fixing frame (521) is arranged at the top of the bottom frame (52) and connected with the two fixing plates (571) through the hanging device (53), the screen box (56) is connected in the fixing frame (521) through the damping spring device (54), the double-shaft vibration motor (57) is arranged in the screen box (56) and fixedly connected with the screen box (56), the two semicircular plates are respectively arranged on two sides of a screen box (56) and are in transmission connection with two main shafts of a double-shaft vibration motor (57), the two semicircular plates (59) are in sliding fit with an underframe (52), the two fixing rods (58) are vertically arranged at the top of the screen box (56), the screen (55) is horizontally arranged at the tops of the two fixing rods (58), the screen (55) is in sliding fit with the side wall of the screening box (2), one end of the suspension device (53) is fixedly connected with a fixing frame (521), the other end of the suspension device (53) is in sliding fit with the two fixing plates (571), one end of the damping spring device (54) is in sliding fit with the screen box (56), and the other end of the damping spring device (54) is fixedly connected with the fixing frame (521).

6. The screening device for building construction according to claim 5, wherein: sand screening subassembly (6) collect mouth (61), base (62), motor fixed block (621), rotate motor (63), first connecting seat (64), head rod (641), second connecting seat (65), second connecting rod (651), connecting axle (66), backup pad (661), shale shaker (67), two and rotate seat (68) and two vibrations spring (69) including the coarse sand, the coarse sand is collected mouth (61) and is set up the side at screening case (2), base (62) level sets up on the inside wall of screening case (2), motor fixed block (621) set up on base (62) and with base (62) fixed connection, it sets up on motor fixed block (621) to rotate motor (63), first connecting seat (64) and second connecting seat (65) symmetry set up the top at base (62), head rod (641) and second connecting rod (651) are connected with first connecting seat (64) and second respectively and first connecting seat (64) and second Seat (65) rotate to be connected, the one end of head rod (641) and the main shaft fixed connection who rotates motor (63), two rotate seat (68) and set up respectively on head rod (641) and second connecting rod (651), connecting axle (66) and two rotate seat (68) fixed connection, shale shaker (67) level set up on screening case (2) and with screening case (2) sliding fit, the bottom and connecting axle (66) fixed connection of backup pad (661), the top of backup pad (661) is rotated with the bottom of shale shaker (67) and is connected, every the both ends of vibrating spring (69) are connected with the bottom of head rod (64), second connecting seat (65) and shale shaker (67) respectively.

7. The screening device for building construction according to claim 6, wherein: the lower part of screening case (2) is located the below of base (62) and is equipped with blanking plate (71) that the slope set up, be equipped with fine sand on the lateral wall of screening case (2) and collect mouth (7), blanking plate (71) and fine sand are collected mouth (7) and are docked mutually.

8. The screening device for building construction according to claim 6, wherein: and arc-shaped sand falling plates (8) are arranged on the vibrating screen (67) and the screen (55).