CN209935235U

CN209935235U - A high-efficient screening sand device for construction

Info

Publication number: CN209935235U
Application number: CN201920336904.XU
Authority: CN
Inventors: 章玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2020-01-14
Anticipated expiration: 2029-03-18

Abstract

The utility model discloses a high-efficiency sand screening device for building construction, which comprises a box body, a feed inlet and a blower, a feed inlet is arranged on one side of the top end of the box body, a groove body is arranged on one side of the top end of the box body, which is positioned at the feed inlet, a blower is arranged on one side of the top end of the box body, which is far away from the feed inlet, the blower is connected with an air inlet pipe, one end of the air inlet pipe, which is far away from the blower, extends to the inner cavity of the tank body and is connected with a flow dividing pipe, the bottom of the flow dividing pipe is provided with a plurality of air outlets which are uniformly distributed, when in use, sand is put into the tank body through the feed inlet, the motor is started, the first clapboard vibrates up and down under the rotation of the second cam, so that the sand passes through the first screen mesh in the downward moving process, and fall onto the second partition plate through the first screen, and stones in the sand can be retained and slide down to the first discharge hole along the first partition plate.

Description

A high-efficient screening sand device for construction

Technical Field

The utility model relates to a building construction equipment technical field specifically is a high-efficient screening sand device for construction.

Background

In the building construction process, in order to prepare the required concrete mortar, the sand needs to be screened so as to obtain finer sand particles meeting the use requirements.

Traditional screening sand process all screens the sand through the manual work to obtain the fine sand of suitable mesh number, this kind of operation mode cost a large amount of time and manpower, its intensity of labour is big, screening sand speed is slow, current screening sand equipment is in addition although can be fine completion screening sand processing task, but be unfavorable for further improving the thickness quality of sand, and be difficult for cleaning the screen cloth, cause the screen cloth to block up easily, consequently, technical personnel in the field provide a high-efficient screening sand device for construction, in order to solve the problem that proposes in the above-mentioned background art.

Disclosure of Invention

An object of the utility model is to provide a high-efficient screening sand device for construction to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a high-efficiency sand screening device for building construction comprises a box body, a feed inlet and a blower, wherein the feed inlet is arranged on one side of the top end of the box body, a groove body is arranged on one side, away from the feed inlet, of the top end of the box body, the blower is connected with an air inlet pipe, one end, away from the blower, of the air inlet pipe extends into an inner cavity of the groove body and is connected with a flow dividing pipe, a plurality of uniformly distributed air outlets are arranged at the bottom of the flow dividing pipe, a heating net is arranged right below the groove body on the inner wall of the top end of the box body, a connecting plate is arranged on the inner wall of the box body and is rotatably connected with a first partition, the top end of the buffer device is connected with the bottom of a first partition plate, a motor bin is arranged below the lowest position of the first partition plate, the motor bin is connected with the inner wall of the box body, a motor is arranged in the inner cavity of the motor bin, the shaft part of the motor is connected with a second cam, a roller wheel is arranged at the position, corresponding to the second cam, of the bottom of the first partition plate, and the roller wheel is in rolling connection with the second cam;

the motor shaft part is connected with a first belt pulley, the first belt pulley is positioned outside a second cam, the first belt pulley is connected with a second belt pulley through a belt, the second belt pulley is sleeved with a third rotating shaft, an L-shaped supporting plate is arranged below the third rotating shaft and connected with the inner wall of the box body, the third rotating shaft is respectively and rotatably connected with the box body and the L-shaped supporting plate through a bearing, a second partition plate is arranged under the first partition plate and is reversely inclined with the first partition plate, a second screen is arranged in the middle of the second partition plate, the lowest part of the second partition plate is rotatably connected with a connecting plate arranged on the inner wall of the box body through a rotating shaft, a spring is arranged at the highest part bottom of the second partition plate, the bottom of the spring is connected with the supporting plate, the supporting plate is connected with the vertical part of the L-shaped supporting plate, and a third screen is arranged under the second, a first sliding rod and a second sliding rod are respectively arranged at two ends of the third screen;

the inner wall of the bottom of the box body is provided with two vertically placed baffles, sliding sleeves are arranged at the positions of the baffles corresponding to the first sliding rod and the second sliding rod, the first sliding rod and the second sliding rod are in uniform sliding sleeve sliding connection, a third rotating shaft is sleeved with a third bevel gear, the third bevel gear is in rotating connection with a fourth bevel gear, the fourth bevel gear is meshed with the third bevel gear, a first rotating shaft is sleeved with a first rotating shaft, the bottom of the first rotating shaft penetrates through the L-shaped supporting plate and extends to the inner wall of the bottom of the box body, the first rotating shaft is respectively in rotating connection with the L-shaped supporting plate and the box body through bearings, the first rotating shaft is provided with a first cam, a roller is arranged at the position of the first sliding rod corresponding to the first cam and is in rolling connection with the first cam, the first rotating shaft is provided with a first bevel gear, and the first bevel gear is positioned, the first bevel gear rotates and is connected with a second bevel gear, the second bevel gear meshes with the first bevel gear, a second bevel gear sleeve is provided with a second rotating shaft, the second rotating shaft penetrates through two baffles and is rotatably connected with the baffles through bearings, a plurality of brush plates which are uniformly distributed are arranged on the side wall of the second rotating shaft, a collecting groove is arranged under the second rotating shaft, and the collecting groove is connected with the inner wall of the bottom of the box body.

When the sand screening device is used, sand is put into the box body through the feed inlet, the motor is started, the first partition plate is vibrated up and down under the rotation of the second cam, so that the sand moves down through the first screen mesh and falls onto the second partition plate through the first screen mesh, stones in the sand can be separated and reserved and slide down along the first partition plate, when the sand entering the second partition plate passes through the second screen mesh, the finer sand can fall onto the third screen mesh through the second screen mesh due to the fact that holes of the second screen mesh are finer than those of the first screen mesh, the coarser sand can slide down through the second partition plate, the third rotating shaft is driven to rotate through the first belt pulley, the first cam is driven to rotate through the third rotating shaft, the third screen mesh can shake under the action of the first sliding rod and the second sliding rod, and the holes of the third screen mesh are finer than those of the second screen mesh, thereby carry out accurate screening to the sand, because long-time use leads to the third screen cloth to block up easily, second pivot when the rotation through first pivot rotates to make the brush board clean the third screen cloth, timely clear up the third screen cloth, because the sand that will sieve is more moist sometimes, through heating wire and the hair-dryer that sets up, the timely sand to in the box heats the evaporation, makes the sand become dry, thereby is convenient for sieve.

As a further aspect of the present invention: the buffer device comprises a sliding barrel and a third sliding rod, the third sliding rod is connected with the sliding barrel in a sliding mode, a limiting block is arranged at the bottom of the third sliding rod and located in an inner cavity of the sliding barrel, a damping spring is arranged at the bottom of the limiting block, and the bottom of the damping spring is connected with the inner wall of the bottom of the sliding barrel.

Through the damping spring who sets up, the first baffle of being convenient for produces vibrations to be favorable to sieving the sand.

As a further aspect of the present invention: the box is located first baffle and the lowest department of second baffle and is provided with first discharge gate and second discharge gate respectively.

Through the first discharge gate and the second discharge gate that set up, be favorable to keeping apart the sand of screening, be convenient for collect.

As a further aspect of the present invention: the bottom of the first partition plate is rotatably connected with a connecting rod through a rotating shaft, and the bottom of the connecting rod is rotatably connected with the top end of the second partition plate through the rotating shaft.

Through setting up the connecting rod, can drive the vibrations of second baffle when first baffle vibrations to be favorable to the second baffle to sieve the sand.

As a further aspect of the present invention: and a guide cylinder is arranged at the corresponding position of the inner wall of the box body and the second sliding rod and is in sliding connection with the second sliding rod.

Through setting up the guide cylinder, played fine limiting displacement to the second slide bar.

As a further aspect of the present invention: and baffles are arranged on two sides of the upper surface of the third screen.

Through the baffle that sets up, when the third screen cloth rocked, sand can not drop from the both sides of third screen cloth.

As a further aspect of the present invention: the side of the first cam and the side of the second cam are both provided with sliding grooves, and the size of each sliding groove is equal to that of each roller.

The side of the first cam and the side of the second cam are provided with sliding grooves, so that the roller is limited.

Compared with the prior art, the beneficial effects of the utility model are that:

1. when the sand screening device is used, sand is put into the box body through the feed inlet, the motor is started, the first partition plate is vibrated up and down under the rotation of the second cam, so that the sand moves down through the first screen mesh and falls onto the second partition plate through the first screen mesh, stones in the sand can be separated and reserved and slide down along the first partition plate, when the sand entering the second partition plate passes through the second screen mesh, the finer sand can fall onto the third screen mesh through the second screen mesh due to the fact that holes of the second screen mesh are finer than those of the first screen mesh, the coarser sand can slide down through the second partition plate, the third rotating shaft is driven to rotate through the first belt pulley, the first cam is driven to rotate through the third rotating shaft, the third screen mesh can shake under the action of the first sliding rod and the second sliding rod, and the holes of the third screen mesh are finer than those of the second screen mesh, thereby finely screening the sand.

2. Because long-time use leads to the third screen cloth to block up easily, second pivot when the rotation through first pivot rotates to make the brush board clean the third screen cloth, timely clear up the third screen cloth, because the sand that will sieve is more moist sometimes, through heating wire and the hair-dryer that sets up, the timely sand to in the box heats the evaporation, makes the sand become dry, thereby is convenient for sieve.

3. Through setting up the connecting rod, can drive the vibrations of second baffle when first baffle vibrations to be favorable to the second baffle to sieve the sand, this device is rational in infrastructure, and the practicality is strong, is fit for the society and uses widely.

Drawings

Fig. 1 is a schematic structural view of an efficient sand sieving apparatus for building construction.

Fig. 2 is a partially enlarged view of a high efficiency sand sieving apparatus for construction.

Fig. 3 is a schematic structural view of a buffering device in an efficient sand sieving device for building construction.

In the figure: 1-box body, 2-feeding hole, 3-blower, 4-trough body, 5-air inlet pipe, 6-shunt pipe, 7-air outlet, 8-heating net, 9-first clapboard, 10-first screen, 11-first discharging hole, 12-connecting rod, 13-opening, 14-buffer device, 15-second clapboard, 16-second screen, 17-second discharging hole, 18-motor cabin, 19-motor, 20-L-shaped supporting plate, 21-first rotating shaft, 22-first bevel gear, 23-second bevel gear, 24-first cam, 25-first sliding rod, 26-baffle, 27-sliding sleeve, 28-second sliding rod, 29-guide cylinder, 30-third screen, 31-second rotating shaft, 32-brush plate, 33-collecting groove, 34-second cam, 35-first belt pulley, 36-belt, 37-second belt pulley, 38-third rotating shaft, 39-third bevel gear, 40-fourth bevel gear, 41-damping spring, 42-third slide bar, 43-slide cylinder and 44-limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, in the embodiment of the present invention, a high-efficiency sand sieving device for building construction comprises a box body 1, a feeding port 2 and a blower 3, wherein the feeding port 2 is arranged on one side of the top end of the box body 1, a tank body 4 is arranged on one side of the top end of the box body 1, the blower 3 is arranged on one side of the top end of the box body 1 away from the feeding port 2, the blower 3 is connected with an air inlet pipe 5, one end of the air inlet pipe 5 away from the blower 3 extends to the inner cavity of the tank body 4 and is connected with a shunt pipe 6, a plurality of uniformly distributed air outlets 7 are arranged at the bottom of the shunt pipe 6, a heating net 8 is arranged on the inner wall of the top end of the box body 1 under the tank body 4, a connecting plate is arranged on the inner wall of the box body 1, the connecting plate is rotatably connected, an opening 13 is formed in the box body 1 and located at the bottom of a first partition plate 9, a buffering device 14 is arranged at the opening 13, the top end of the buffering device 14 is connected with the bottom of the first partition plate 9, a motor cabin 18 is arranged below the lowest position of the first partition plate 9, the motor cabin 18 is connected with the inner wall of the box body 1, a motor 19 is arranged in an inner cavity of the motor cabin 18, the shaft portion of the motor 19 is connected with a second cam 34, a roller wheel is arranged at the position, corresponding to the second cam 34, of the bottom of the first partition plate 9, and the roller wheel is in rolling connection with the second cam;

the shaft part of the motor 19 is connected with a first belt pulley 35, the first belt pulley 35 is positioned outside a second cam 34, the first belt pulley 35 is connected with a second belt pulley 37 through a belt 36, the second belt pulley 37 is sleeved with a third rotating shaft 38, an L-shaped supporting plate 20 is arranged below the third rotating shaft 38, the L-shaped supporting plate 20 is connected with the inner wall of the box body 1, the third rotating shaft 38 is respectively and rotatably connected with the box body 1 and the L-shaped supporting plate 20 through a bearing, a second partition plate 15 is arranged under the first partition plate 9, the second partition plate 15 and the first partition plate 9 are reversely inclined, a second screen 16 is arranged in the middle of the second partition plate 15, the lowest part of the second partition plate 15 is rotatably connected with a connecting plate arranged on the inner wall of the box body 1 through a rotating shaft, the bottom of the highest part of the second partition plate 15 is provided with a spring, and the bottom, the support plate is connected with the vertical part of the L-shaped support plate 20, a third screen 30 is arranged under the second partition plate 15, and a first sliding rod 25 and a second sliding rod 28 are respectively arranged at two ends of the third screen 30;

the inner wall of the bottom of the box body 1 is provided with two vertically placed baffles 26, sliding sleeves 27 are respectively arranged at the positions of the baffles 26 corresponding to the first sliding rod 25 and the second sliding rod 28, the first sliding rod 25 and the second sliding rod 28 are in sliding connection with each other through the sliding sleeves 27, a third rotating shaft 38 is sleeved with a third bevel gear 39, the third bevel gear 39 is rotatably connected with a fourth bevel gear 40, the fourth bevel gear 40 is meshed with the third bevel gear 39, the fourth bevel gear 40 is sleeved with a first rotating shaft 21, the bottom of the first rotating shaft 21 penetrates through the L-shaped supporting plate 20 and extends to the inner wall of the bottom of the box body 1, the first rotating shaft 21 is respectively rotatably connected with the L-shaped supporting plate 20 and the box body 1 through bearings, the first rotating shaft 21 is sleeved with a first cam 24, rollers are arranged at the positions of the first sliding rod 25 corresponding to the first cam 24 and are in rolling connection with the first cam, first pivot 21 cover is equipped with first bevel gear 22, first bevel gear 22 is located first cam 24 below, first bevel gear 22 rotates and is connected with second bevel gear 23, second bevel gear 23 meshes with first bevel gear 22 mutually, second bevel gear 23 cover is equipped with second pivot 31, second pivot 31 all passes two baffles 26 and is connected with baffle 26 rotation through the bearing, second pivot 31 lateral wall is provided with a plurality of evenly distributed's brush board 32, be provided with collecting vat 33 under the second pivot 31, collecting vat 33 connects the inner wall of box 1 bottom.

When the sand screening device is used, sand is put into the box body 1 through the feed inlet 2, the motor 19 is started, the first partition plate 9 is vibrated up and down under the rotation of the second cam 34, so that the sand moves downwards through the first screen mesh 10 and falls onto the second partition plate 15 through the first screen mesh 10, stones in the sand are separated and reserved and slide down along the first partition plate 9, when the sand entering the second partition plate 15 passes through the second screen mesh 16, because the holes of the second screen mesh 16 are finer than those of the first screen mesh 10, the finer sand falls onto the third screen mesh 30 through the second screen mesh 16, the coarser sand slides downwards through the second partition plate 15, the first belt pulley 35 drives the third rotating shaft 38 to rotate, and the third rotating shaft 38 drives the first rotating shaft 21 to rotate, so that the first cam 24 rotates, and the third screen mesh 30 is shaken under the action of the first sliding rod 25 and the second sliding rod 28, because the hole of third screen cloth 30 is more meticulous than the hole of second screen cloth 16, thereby carry out accurate screening to the sand, because long-time use leads to third screen cloth 30 to block up easily, second pivot 31 when the rotation through first pivot 21 rotates, thereby make brush board 32 clean third screen cloth 30, timely clear up third screen cloth 30, because the sand that will sieve is wet sometimes, through heating net 8 and the hair-dryer 3 that set up, timely heat the evaporation to the sand in the box 1, make the sand become dry, thereby be convenient for sieve.

The buffer device 14 comprises a sliding barrel 43 and a third sliding rod 42, the third sliding rod 42 is connected with the sliding barrel 43 in a sliding mode, a limiting block 44 is arranged at the bottom of the third sliding rod 42, the limiting block 44 is located in the inner cavity of the sliding barrel 43, a damping spring 41 is arranged at the bottom of the limiting block 44, and the bottom of the damping spring 41 is connected with the inner wall of the bottom of the sliding barrel 43.

Through the damping spring 41 that sets up, be convenient for first baffle 9 produces vibrations to be favorable to sieving the sand.

The box body 1 is provided with a first discharge hole 11 and a second discharge hole 17 at the lowest positions of the first partition plate 9 and the second partition plate 15 respectively.

Through the first discharge gate 11 and the second discharge gate 17 that set up, be favorable to keeping apart the sand of screening, be convenient for collect.

The bottom of the first partition board 9 is rotatably connected with a connecting rod 12 through a rotating shaft, and the bottom of the connecting rod 12 is rotatably connected with the top end of the second partition board 15 through the rotating shaft.

Through setting up connecting rod 12, can drive second baffle 15 vibrations when first baffle 9 vibrations to be favorable to second baffle 15 to sieve the sand.

A guide cylinder 29 is arranged on the inner wall of the box body 1 corresponding to the second slide bar 28, and the guide cylinder 29 is connected with the second slide bar 28 in a sliding manner.

The guide cylinder 29 is arranged, so that the second sliding rod 28 is well limited.

Baffles are arranged on two sides of the upper surface of the third screen 30.

Through the baffle that sets up, when third screen cloth 30 rocked, sand can not drop from the both sides of third screen cloth 30.

The side edges of the first cam 24 and the second cam 34 are provided with sliding grooves, and the size of each sliding groove is equal to that of each roller.

The sliding grooves are formed in the side edges of the first cam 24 and the second cam 34, so that the roller is limited.

The utility model discloses a theory of operation is:

the utility model relates to a high-efficient sand sieving mechanism for construction, during the use, throw into the sand through feed inlet 2 in box 1, start motor 19 makes first baffle 9 shake from top to bottom under the rotation of second cam 34, thereby make the sand move down in-process through first screen cloth 10, and drop on second baffle 15 through first screen cloth 10, the stone in the sand can be kept apart and slide down along first baffle 9, when the sand that enters on second baffle 15 passes through second screen cloth 16, because the hole of second screen cloth 16 is more meticulous than the hole of first screen cloth 10, consequently thinner sand can drop on third screen cloth 30 through second screen cloth 16, thicker sand can slide down through second baffle 15, drive third pivot 38 through first belt pulley 35 and rotate, and drive first pivot 21 through third pivot 38 and rotate, thereby make first cam 24 rotate, thereby the third screen 30 is shaken under the action of the first slide bar 25 and the second slide bar 28, the holes of the third screen 30 are finer than the holes of the second screen 16, thereby the sand is precisely screened, the third screen 30 is easily blocked due to long-time use, the second rotating shaft 31 rotates through the rotation of the first rotating shaft 21, thereby the brush board 32 cleans the third screen 30, the third screen 30 is cleaned in time, the sand to be screened is sometimes wet, the sand in the box body 1 is heated and evaporated in time through the arranged heating net 8 and the blower 3, so the sand becomes dry, thereby the screening is convenient, through the arrangement of the connecting rod 12, the second clapboard 15 is driven to shake when the first clapboard 9 shakes, thereby being beneficial to the second clapboard 15 to screen the sand, the device has reasonable structure and strong practicability, is suitable for wide social use.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A high-efficient screening sand device for construction, includes box (1), feed inlet (2) and hair-dryer (3), its characterized in that, box (1) top one side is provided with feed inlet (2), box (1) top is located feed inlet (2) one side and is provided with cell body (4), box (1) top is kept away from feed inlet (2) one side and is provided with hair-dryer (3), hair-dryer (3) are connected with air-supply line (5), air-supply line (5) keep away from hair-dryer (3) one end and extend to cell body (4) inner chamber and be connected with shunt tubes (6), shunt tubes (6) bottom is provided with a plurality of evenly distributed's air outlet (7), box (1) top inner wall is located and is provided with heating screen (8) under cell body (4), box (1) inner wall is provided with the connecting plate, the connecting plate is rotatably connected with a first partition plate (9) through a rotating shaft, the first partition plate (9) is obliquely arranged, a first screen (10) is arranged in the middle of the first partition plate (9), an opening (13) is formed in the position, located at the bottom of the first partition plate (9), of the box body (1), a buffer device (14) is arranged at the position of the opening (13), the top end of the buffer device (14) is connected with the bottom of the first partition plate (9), a motor cabin (18) is arranged below the lowest position of the first partition plate (9), the motor cabin (18) is connected with the inner wall of the box body (1), a motor (19) is arranged in the inner cavity of the motor cabin (18), a second cam (34) is connected to the shaft portion of the motor (19), a roller wheel is arranged at the position, corresponding to the second cam (34), of the bottom of the first partition plate (9), and the;

the shaft part of the motor (19) is connected with a first belt pulley (35), the first belt pulley (35) is positioned outside a second cam (34), the first belt pulley (35) is connected with a second belt pulley (37) through a belt (36), the second belt pulley (37) is sleeved with a third rotating shaft (38), an L-shaped supporting plate (20) is arranged below the third rotating shaft (38), the inner wall of the box body (1) is connected with the L-shaped supporting plate (20) through a bearing, the third rotating shaft (38) is respectively connected with the box body (1) and the L-shaped supporting plate (20) in a rotating way through a bearing, a second partition plate (15) is arranged under the first partition plate (9), the second partition plate (15) and the first partition plate (9) are arranged in a reverse inclining way, the middle part of the second partition plate (15) is provided with a second screen (16), the lowest part of the second partition plate (15) is connected with the rotating way of the inner wall of the box body (1) through, a spring is arranged at the bottom of the highest position of the second partition plate (15), a support plate is connected to the bottom of the spring and is connected with the vertical part of the L-shaped support plate (20), a third screen (30) is arranged right below the second partition plate (15), and a first sliding rod (25) and a second sliding rod (28) are respectively arranged at two ends of the third screen (30);

the inner wall of the bottom of the box body (1) is provided with two vertically placed baffles (26), sliding sleeves (27) are arranged at the positions of the baffles (26) corresponding to the first sliding rod (25) and the second sliding rod (28), the first sliding rod (25) and the second sliding rod (28) are uniformly in sliding connection with each other, a third bevel gear (39) is sleeved on a third rotating shaft (38), the third bevel gear (39) is rotatably connected with a fourth bevel gear (40), the fourth bevel gear (40) is meshed with the third bevel gear (39), the fourth bevel gear (40) is sleeved with a first rotating shaft (21), the bottom of the first rotating shaft (21) penetrates through the L-shaped supporting plate (20) and extends to the inner wall of the bottom of the box body (1), the first rotating shaft (21) is rotatably connected with the L-shaped supporting plate (20) and the box body (1) through bearings respectively, and a first cam (24) is sleeved on the first rotating shaft (21), a roller is arranged at the position of the first slide bar (25) corresponding to the first cam (24), and the roller is in rolling connection with the first cam (24), the first rotating shaft (21) is sleeved with a first bevel gear (22), the first bevel gear (22) is positioned below the first cam (24), the first bevel gear (22) is rotationally connected with a second bevel gear (23), the second bevel gear (23) is meshed with the first bevel gear (22), the second bevel gear (23) is sleeved with a second rotating shaft (31), the second rotating shaft (31) penetrates through the two baffle plates (26) and is rotatably connected with the baffle plates (26) through bearings, the side wall of the second rotating shaft (31) is provided with a plurality of brush plates (32) which are uniformly distributed, a collecting groove (33) is arranged under the second rotating shaft (31), and the collecting groove (33) is connected with the inner wall of the bottom of the box body (1).

2. The efficient sand screening device for building construction according to claim 1, wherein the buffer device (14) comprises a sliding barrel (43) and a third sliding rod (42), the third sliding rod (42) is slidably connected with the sliding barrel (43), a limiting block (44) is arranged at the bottom of the third sliding rod (42), the limiting block (44) is positioned in an inner cavity of the sliding barrel (43), a damping spring (41) is arranged at the bottom of the limiting block (44), and the bottom of the damping spring (41) is connected with the inner wall of the bottom of the sliding barrel (43).

3. The high-efficiency sand screening device for building construction according to claim 1, wherein the box body (1) is provided with a first discharge port (11) and a second discharge port (17) at the lowest positions of the first partition plate (9) and the second partition plate (15), respectively.

4. The efficient sand screening device for building construction according to claim 1 is characterized in that the bottom of the first partition plate (9) is rotatably connected with a connecting rod (12) through a rotating shaft, and the bottom of the connecting rod (12) is rotatably connected with the top end of the second partition plate (15) through a rotating shaft.

5. The high-efficiency sand screening device for building construction is characterized in that a guide cylinder (29) is arranged on the inner wall of the box body (1) corresponding to the second sliding rod (28), and the guide cylinder (29) is connected with the second sliding rod (28) in a sliding mode.

6. The high-efficiency sand screening device for building construction as claimed in claim 1, wherein the third screen (30) is provided with baffles on both sides of the upper surface thereof.

7. The efficient sand screening device for building construction as claimed in claim 1, wherein the first cam (24) and the second cam (34) are provided with sliding grooves at the sides, and the size of the sliding grooves is equal to that of the rollers.