CN211412668U

CN211412668U - Sand screening plant for construction that screening effect is good

Info

Publication number: CN211412668U
Application number: CN201921799736.4U
Authority: CN
Inventors: 张宝荣; 谢国
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-09-04
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses an effectual sand screening plant for construction of screening relates to construction technical field, and it includes the screening case, the top of screening case is provided with the pan feeding mouth, the left side fixedly connected with motor cabinet of screening case, fixed mounting has the motor on the motor cabinet. This sand screening plant for construction that screening is effectual, rotation through the motor drives the rotation of pivot one and pivot two, the rotation of pivot one and pivot two drives helical impeller's rotation, the rotation through helical impeller drives the right motion that rolls of sand, the sand is when rolling the right motion, the sand passes through the sieve and falls on U type sieve one, impurity in the sand rolls along with helical impeller's rotation and moves between connecting plate one and the baffle, thereby do not need the manual work to sieve the sand and handle, just accomplished and carried out the one-level screening to the sand, separate sand and impurity, bring convenience for workman's work, workman's the amount of labour has been alleviateed.

Description

Sand screening plant for construction that screening effect is good

Technical Field

The utility model relates to a construction technical field specifically is a sand screening plant for construction that screening is effectual.

Background

In the construction, need use the sand as the batching to the concrete placement mortar, contain more impurity in the middle of the sand, because the granule size of sand is different, the sand of different granule sizes is chooseed for use to the construction requirement of difference, consequently, the sand can not directly be used when buying back, need sieve the processing to the sand, current screening plant, often all sieve the processing through the manual work to the sand, the screening treatment effect of this kind of sand is not good, and the screening process of sand is slower, increase workman's the amount of labour, influence the construction process of construction, current screening plant will sieve the back and will sieve the secondary loading of sand, greatly increased workman's the amount of labour, the work of giving the workman brings inconvenience.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a sand screening plant for construction that screening effect is good has solved current screening plant, often all sieves the processing through the manual work to the sand, and the screening treatment effect of this kind of sand is not good to the screening process of sand is slower, increases workman's the amount of labour, influences the problem of construction progress of construction.

(II) technical scheme

In order to achieve the above purpose, the utility model adopts the technical proposal that: a sand screening device with good screening effect for building construction comprises a screening box, wherein a feeding hole is formed in the top of the screening box, a motor base is fixedly connected to the left side of the screening box, a motor is fixedly mounted on the motor base, an output shaft of the motor is fixedly connected with one end of a first rotating shaft, two bearings are sleeved on the first rotating shaft and are respectively clamped on the screening box and a first connecting plate, the upper surface of the first connecting plate is fixedly connected with the top of the inner wall of the screening box, the other end of the first rotating shaft is fixedly connected with a second rotating shaft, spiral impellers are fixedly connected to the outer walls of the first rotating shaft and the second rotating shaft, two L-shaped fixing plates are correspondingly and fixedly connected to the front and the back of the left side of the screening box, a same partition plate is lapped between the two L-shaped fixing plates, round holes are formed in two sides of the partition plate, and a first spring is arranged in the, the both ends of spring one respectively with the inner wall fixed connection of kelly and round hole, and two kellies joint respectively in the draw-in groove that two L type fixed plates all seted up, and the same rope two of fixedly connected with between two kellies, rope two is placed in the wire casing of seting up at the baffle, rope two is connected with the one end of rope one, another wire casing that the other end of rope one passed the baffle and seted up is connected with the pull rod, the interior fixedly connected with sieve of wire casing that the bottom of the screening case was seted up of delivering.

The lower surface of the screening box is fixedly connected with two supporting plates II, the lower surfaces of the two supporting plates II are fixedly connected with two supporting legs, the same supporting plate I is fixedly connected between the two supporting legs at the left side, the same supporting plate III is fixedly connected between the two supporting legs at the right side, the upper surface of the supporting plate III is lapped with the lower surface of the sliding plate, the right side of the sliding plate is fixedly connected with one end of the spring II, the other end of the spring II is fixedly connected with the left side of the fixing plate, the upper surface of the fixing plate is fixedly connected with the bottom of the screening box, the left side of the sliding plate is fixedly connected with the right side of the U-shaped screen plate I, the right and left sides of the lower surface of the U-shaped screen plate I are respectively and fixedly connected with the U-shaped blanking plate I and the U-shaped blanking plate II, and a small trolley, the left side of U type sieve one and the right side fixed connection of U type sieve two, flitch three and U type unloading board four under the right left side difference fixedly connected with U type of the lower surface of U type sieve two, the below of flitch four is provided with small handcart two under three and the U type of U type unloading board, the left side fixedly connected with baffle of U type sieve two, the left side fixedly connected with connecting rod of baffle, the other end fixedly connected with push pedal of connecting rod, the upper and lower surface of push pedal and the inner wall looks overlap joint of U type case, the bottom and the backup pad fixed connection of U type case.

The output shaft of the motor is sleeved with a first belt pulley, the first belt pulley is connected with a second belt pulley through a belt, a fourth rotating shaft is sleeved in the second belt pulley, the right end of the fourth rotating shaft is sleeved with a second bearing, the second bearing is clamped on a second connecting plate fixedly connected with the first supporting plate, the left end of the fourth rotating shaft is fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear, the second bevel gear is fixedly connected with one end of a third rotating shaft, the third rotating shaft is sleeved with a third bearing, the third bearing is clamped on a U-shaped box, the other end of the third rotating shaft is fixedly connected with a cam, and the cam is arranged in the U-shaped box.

Preferably, the right side of the supporting legs is fixedly connected with a control box, a switch is arranged in the control box, and the switch is connected with the motor through an electric wire.

Preferably, the leakage hole of the sieve plate is larger than the leakage hole of the U-shaped sieve plate II, and the leakage hole of the U-shaped sieve plate II is larger than the leakage hole of the U-shaped sieve plate I.

Preferably, the sliding plate, the connecting rod, the U-shaped sieve plate I and the U-shaped sieve plate II are inclined.

Preferably, the first U-shaped blanking plate and the second U-shaped blanking plate are arranged in a relatively inclined mode, the distance between the front portion and the rear portion of the first U-shaped blanking plate and the distance between the front portion and the rear portion of the second U-shaped blanking plate are sequentially narrowed from top to bottom, the third U-shaped blanking plate and the fourth U-shaped blanking plate are arranged in a relatively inclined mode, and the distance between the front portion and the rear portion of the third U-shaped blanking plate and the distance between the front portion and the rear portion of the fourth U-shaped blanking plate are sequentially narrowed from.

(III) advantageous effects

The beneficial effects of the utility model reside in that:

1. this sand screening plant for construction that screening is effectual, rotation through the motor drives the rotation of pivot one and pivot two, the rotation of pivot one and pivot two drives helical impeller's rotation, the rotation through helical impeller drives the right motion that rolls of sand, the sand is when rolling the right motion, the sand passes through the sieve and falls on U type sieve one, impurity in the sand rolls along with helical impeller's rotation and moves between connecting plate one and the baffle, thereby do not need the manual work to sieve the sand and handle, just accomplished and carried out the one-level screening to the sand, separate sand and impurity, bring convenience for workman's work, workman's the amount of labour has been alleviateed.

2. The sand screening device for building construction with good screening effect pushes the push plate to move rightwards through the rotation of the cam, the push plate moves rightwards to drive the sliding plate, the connecting rod, the first U-shaped screen plate and the second U-shaped screen plate to move rightwards, the sliding plate, the connecting rod, the first U-shaped screen plate and the second U-shaped screen plate to move leftwards through the elasticity of the second spring, the sand on the first U-shaped screen plate is dropped into the first small trolley through the matching of the first U-shaped screen plate, the first U-shaped blanking plate and the second U-shaped blanking plate, the sand with slightly large particles slides downwards to the second U-shaped screen plate through the inclined arrangement of the first U-shaped screen plate, then drops into the second small trolley through the matching of the second U-shaped screen plate, the third U-shaped blanking plate and the fourth U-shaped blanking plate, and screens sands with different particle sizes through the left-right movement of the first U-shaped screen plate and the second U, the screening effect of sand is improved, and thus the sand after screening does not need to be loaded for the second time through setting up small handcart one and small handcart two, the amount of labour of workers is lightened, and the work of giving the workers brings convenience.

3. This sand screening plant for construction that screening is effectual, through the pull rod, rope one, rope two and the cooperation of kelly, when the impurity between connecting plate one and the baffle needs to be cleared up, through pulling the pull rod, rope one and two drive kellies shrink in the round hole of rope, make the kelly no longer the joint in the draw-in groove, just accomplished the dismantlement to the baffle, it is simple to dismantle, the workman of being convenient for clears up the impurity between connecting plate one and the baffle, it is convenient to bring for workman's work.

Drawings

Fig. 1 is a schematic view of the front cross-sectional structure of the present invention;

FIG. 2 is a schematic diagram of the enlarged structure of the right-side section of the partition plate of the present invention;

FIG. 3 is a schematic view of a first overlooking enlarged structure of the bevel gear of the present invention;

fig. 4 is an enlarged schematic view of part a of the present invention.

In the figure: 1 screening box, 2 motors, 3 belt pulleys I, 4 feeding ports, 5 rotating shafts I, 6 spiral impellers, 7 bearings I, 8 connecting plates I, 9 rotating shafts II, 10 partition plates, 11 ropes I, 12 pull rods, 13 clamping grooves, 14 clamping rods, 15 round holes, 16 springs I, 17 ropes II, 18L-shaped fixing plates, 19 sieve plates, 20 springs II, 21 fixing plates, 22 sliding plates, 23U-shaped sieve plates I, 24U-shaped blanking plates I, 25U-shaped blanking plates II, 26 control boxes, 27 small trolleys I, 28U-shaped blanking plates III, 29 small trolleys II, 30U-shaped blanking plates IV, 31 supporting legs, 32 supporting plates I, 33U-shaped boxes, 34 rotating shafts III, 35 cams, 36 connecting rods, 37 pushing plates, 38 bearings II, 39 connecting plates II, 40 rotating shafts IV, 41 belt pulleys II, 42 belts, 43 bevel gears I, 44 bevel gears II, 45 bearings III, 46 supporting plates II, 47 baffle plates, 48 support plates III, 49 motor bases and 50U-shaped sieve plates II.

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.

As shown in fig. 1-4, the utility model provides a technical solution: a sand screening device with good screening effect for building construction comprises a screening box 1, a feeding port 4 is arranged at the top of the screening box 1, a motor base 49 is fixedly connected to the left side of the screening box 1, a motor 2 is fixedly installed on the motor base 49, an output shaft of the motor 2 is fixedly connected with one end of a rotating shaft I5, two bearings I7 are sleeved on the rotating shaft I5, the two bearings I7 are respectively clamped on the screening box 1 and a connecting plate I8, the upper surface of the connecting plate I8 is fixedly connected with the top of the inner wall of the screening box 1, the other end of the rotating shaft I5 is fixedly connected with a rotating shaft II 9, spiral impellers 6 are fixedly connected to the outer walls of the rotating shaft I5 and the rotating shaft II 9, the rotating shaft I5 and the rotating shaft II 9 drive the rotating of the spiral impellers 6 to rotate, and the rolling impellers 6 drive sand to move rightwards, sand is when rolling right side motion, the sand drops on U type sieve 23 through sieve 19, impurity in the sand rolls along with spiral impeller 6's rotation and moves between connecting plate 8 and baffle 10, thereby do not need the manual work to sieve the sand and handle, just accomplished and carried out the one-level screening to the sand, separate sand and impurity, it is convenient to bring the work for the workman, workman's the amount of labour has been alleviateed, it corresponds two L type fixed plates 18 of fixedly connected with around the left side of screening case 1, and the overlap joint has same baffle 10 between two L type fixed plates 18, the cooperation through two L type fixed plates 18 plays limiting displacement to baffle 10, make baffle 10 can only reciprocate between two L type fixed plates 18, can not the back-and-forth movement, round hole 15 has all been seted up to the both sides of baffle 10, its round hole 15's effect lies in: the clamping rod 14 contracts in the round hole 15 when being pulled, a first spring 16 is arranged in the round hole 15, and the first spring 16 has the following effects: the clamping rods 14 are driven to be clamped in the clamping grooves 13 by the elasticity of the first spring 16, two ends of the first spring 16 are fixedly connected with the clamping rods 14 and the inner walls of the round holes 15 respectively, the two clamping rods 14 are clamped in the clamping grooves 13 formed in the two L-shaped fixing plates 18 respectively, the same rope II 17 is fixedly connected between the two clamping rods 14, the rope II 17 is placed in the wire placing groove formed in the partition plate 10, the rope II 17 is connected with one end of the rope I11, the other end of the rope I11 penetrates through the other wire placing groove formed in the partition plate 10 to be connected with the pull rod 12, when impurities between the connecting plate I8 and the partition plate 10 need to be cleaned, the clamping rods 14 are driven to be contracted in the round holes 15 by pulling the pull rod 12, the rope I11 and the rope II 17, the clamping rods 14 are not clamped in the clamping grooves 13 any more, the partition plate 10 is disassembled, the disassembling is simple, a worker can clean the impurities between the connecting plate I8 and, brings convenience to workers, and a sieve plate 19 is fixedly connected in a feed opening formed in the bottom of the fed sieving box 1.

Two backup pads 46 of lower fixed surface of screening case 1, and two backup pads 31 of the equal fixedly connected with of lower surface of two backup pads 46, and the same backup pad 32 of fixedly connected with between two backup pads 31 of left side, and the same backup pad three 48 of fixedly connected with between two backup pads 31 of right side, the right side fixedly connected with control box 26 of backup pad 31, be provided with the switch in the control box 26, and the switch is connected with motor 2 through the electric wire, the upper surface of three 48 backup pads and slide 22's lower surface overlap joint mutually, the upper surface inclination of three 48 backup pads is 35 degrees, its effect lies in: the sliding plate 22 is supported, so that the sliding plate 22 can move left and right on the upper surface of the third support plate 48, the right side of the sliding plate 22 is fixedly connected with one end of the second spring 20, and the second spring 20 has the following functions: two 20 shrink of spring when the effect that receives slide 22 extrudees right at two 20 springs, rely on two 20 elasticity of spring to drive slide 22 and remove left when two 20 springs are no longer extruded to slide 22, the other end of two 20 springs and the left side fixed connection of fixed plate 21, the upper surface of fixed plate 21 and the bottom fixed connection of screening case 1, the left side of slide 22 and the right side fixed connection of U type sieve one 23, flitch two 25 under the right and left both sides difference fixedly connected with U type blanking plate 24 and the U type of the lower surface of U type sieve one 23, the below of flitch two 25 is provided with small handcart one 27 under U type blanking plate 24 and the U type, the effect of flitch two 25 under its U type blanking plate 24 and the U type lies in: the sand particles on the U-shaped sieve plate I23 fall into the small trolley I27 through the U-shaped blanking plate I24 and the U-shaped blanking plate II 25, the phenomenon that the sand is scattered on the ground to increase the labor capacity of workers is avoided, the left side of the U-shaped sieve plate I23 is fixedly connected with the right side of the U-shaped sieve plate II 50, the leak hole of the sieve plate 19 is larger than the leak hole of the U-shaped sieve plate II 50, the leak hole of the U-shaped sieve plate II 50 is larger than the leak hole of the U-shaped sieve plate I23, the sand with different sizes in the screening box 1 falls through the sieve plate 19, then sieving sand with different sizes through the first U-shaped sieve plate 23 and the second U-shaped sieve plate 50, thereby improved the screening effect of sand, brought the convenience for workman's work, flitch four 30 under flitch three 28 and the U type under the flitch under the U type respectively fixedly connected with U type of the right left side of the two 50 lower surfaces of U type sieve, flitch four 30's effect lies in under three 28 and the U type of its U type flitch under flitch: make the sand of slightly big granule on the two 50 of U type sieve fall in little shallow two 29 through flitch three 28 and the four 30 of flitch under the U type, avoided the sand to spill and increased workman's the amount of labour on ground, flitch two 25 are the relative slope setting under one 24 and the U type under the U type, and the distance from the top down between one 24 and the two 25 front and back of U type flitch narrows in proper order under the U type, flitch four 30 are the relative slope setting under three 28 and the U type under the U type, and the distance from the top down between flitch four 30 front and back under three 28 and the U type of U type flitch narrows in proper order under U type, flitch three 28 and the four 30 below of U type flitch are provided with little shallow two 29 under the U type, the left side fixedly connected with baffle 47 of two 50 of U type, baffle 47's effect lies in: prevent that sand from slipping down in two 50 of U type sieve boards, cause the sand to spill, increase the unnecessary amount of labour, the left side fixedly connected with connecting rod 36 of baffle 47, slide 22, connecting rod 36, two 50 inclination of U type sieve board 23 and U type sieve board are 35 degrees, the other end fixedly connected with push pedal 37 of connecting rod 36, push pedal 37's upper and lower surface and the inner wall looks overlap joint of U type case 33, the bottom and a 32 fixed connection of backup pad of U type case 33.

A first belt pulley 3 is sleeved on an output shaft of the motor 2, the first belt pulley 3 is connected with a second belt pulley 41 through a belt 42, a fourth rotating shaft 40 is sleeved in the second belt pulley 41, a second bearing 38 is sleeved at the right end of the fourth rotating shaft 40, the second bearing 38 is clamped on a second connecting plate 39 fixedly connected with a first supporting plate 32, a first bevel gear 43 is fixedly connected at the left end of the fourth rotating shaft 40, the first bevel gear 43 is meshed with a second bevel gear 44, the second bevel gear 44 is fixedly connected with one end of a third rotating shaft 34, a third bearing 45 is sleeved on the third rotating shaft 34, the third bearing 45 is clamped on a U-shaped box 33, the other end of the third rotating shaft 34 is fixedly connected with a cam 35, the cam 35 is arranged in the U-shaped box 33, the rotation of the motor 2 drives the first belt pulley 3 to rotate, the first belt pulley 3 drives the second belt pulley 41 to rotate through the transmission of, the bevel gear I43 is meshed with the transmission bevel gear II 44 to rotate, the rotation of the bevel gear II 44 drives the rotating shaft III 34 and the cam 35 to rotate, the rotation of the cam 35 pushes the push plate 37 to move rightwards, the push plate 37 moves rightwards to drive the sliding plate 22, the connecting rod 36, the U-shaped sieve plate I23 and the U-shaped sieve plate II 50 to move rightwards, the sliding plate 22, the connecting rod 36, the U-shaped sieve plate I23 and the U-shaped sieve plate II 50 to move leftwards through the elastic force of the spring II 20, and the sand is driven to shake through the left-right movement of the U-shaped sieve plate I23 and the U-shaped sieve plate II 50 to accelerate the falling speed of the sand, so that the screening treatment of the sand is.

The utility model discloses an operating procedure does:

s1, firstly, sand is fed into the screening box 1 through the feeding port 4, then the switch is turned on through the control box 26 to enable the motor 2 to be electrified and rotated, the rotation of the motor 2 drives the rotating shaft I5 and the rotating shaft II 9 to rotate, the rotating shaft I5 and the rotating shaft II 9 drive the spiral impeller 6 to rotate, the rotation of the spiral impeller 6 drives the sand to roll to the right, when the sand rolls to the right, the sand falls on the U-shaped screen plate I23 through the screen plate 19, and impurities in the sand roll and move between the connecting plate I8 and the partition plate 10 along with the rotation of the spiral impeller 6;

s2, meanwhile, the rotation of the motor 2 drives the rotation of the belt pulley I3, the belt pulley I3 drives the belt pulley II 41 to rotate through the transmission of the rear belt 42, the rotation of the belt pulley II 41 drives the rotation of the rotating shaft IV 40 and the bevel gear I43, the bevel gear I43 is meshed with the rotation of the transmission bevel gear II 44, the rotation of the bevel gear II 44 drives the rotating shaft III 34 and the cam 35 to rotate, the rotation of the cam 35 pushes the push plate 37 to move rightwards, the push plate 37 moves rightwards to drive the sliding plate 22, the connecting rod 36, the U-shaped sieve plate I23 and the U-shaped sieve plate II 50 to move rightwards, the sliding plate 22, the connecting rod 36, the U-shaped sieve plate I23 and the U-shaped sieve plate II 50 are driven to move leftwards through the elasticity of the;

s3, the small-particle sand passes through the first U-shaped sieve plate 23, the first U-shaped blanking plate 24 and the second U-shaped blanking plate 25 fall into the first trolley 27 in a matched mode, the slightly large-particle sand passes through the second U-shaped sieve plate 50, the third U-shaped blanking plate 28 and the fourth U-shaped blanking plate 30 in a matched mode, the slightly large-particle sand falls into the second trolley 29, and finally when impurities between the first connecting plate 8 and the partition plate 10 need to be cleaned, the pull rod 12 is pulled, the first rope 11 and the second rope 17 drive the clamping rod 14 to shrink in the round hole 15, the clamping rod 14 is not clamped in the clamping groove 13 any more, the partition plate 10 is detached conveniently, and workers can clean the impurities between the first connecting plate 8 and the partition plate 10 conveniently.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an effectual sand screening plant for construction of screening, includes screening case (1), its characterized in that: the screening box is characterized in that a feeding port (4) is formed in the top of the screening box (1), a motor base (49) is fixedly connected to the left side of the screening box (1), a motor (2) is fixedly mounted on the motor base (49), an output shaft of the motor (2) is fixedly connected with one end of a first rotating shaft (5), two bearings (7) are sleeved on the first rotating shaft (5), the two bearings (7) are respectively clamped on the screening box (1) and a first connecting plate (8), the upper surface of the first connecting plate (8) is fixedly connected with the top of the inner wall of the screening box (1), a second rotating shaft (9) is fixedly connected with the other end of the first rotating shaft (5), spiral impellers (6) are fixedly connected to the outer walls of the first rotating shaft (5) and the second rotating shaft (9), and two L-shaped fixing plates (18) are correspondingly and fixedly connected with the front side and the rear side of the screening box (1), and the same clapboard (10) is lapped between the two L-shaped fixing plates (18), both sides of the clapboard (10) are provided with round holes (15), a first spring (16) is arranged in the round hole (15), two ends of the first spring (16) are respectively fixedly connected with the clamping rod (14) and the inner wall of the round hole (15), and the two clamping rods (14) are respectively clamped in the clamping grooves (13) formed in the two L-shaped fixing plates (18), and a second rope (17) is fixedly connected between the two clamping rods (14), the second rope (17) is placed in a wire placing groove formed in the partition plate (10), the second rope (17) is connected with one end of the first rope (11), the other end of the rope I (11) penetrates through another wire placing groove formed in the partition plate (10) to be connected with the pull rod (12), and a sieve plate (19) is fixedly connected in a material discharging hole formed in the bottom of the fed sieving box (1);

two backup pads two (46) of lower fixed surface fixedly connected with of screening case (1), and two supporting legss (31) of the equal fixedly connected with of lower surface of two backup pads two (46), and fixedly connected with one backup pad (32) between two supporting legss (31) on the left side, and fixedly connected with one backup pad three (48) between two supporting legss (31) on the right side, the upper surface of backup pad three (48) and the lower surface overlap joint of slide (22), the right side of slide (22) and the one end fixed connection of spring two (20), the other end of spring two (20) and the left side fixed connection of fixed plate (21), the upper surface of fixed plate (21) and the bottom fixed connection of screening case (1), the left side of slide (22) and the right side fixed connection of U type sieve one (23), the right and left sides difference fixedly connected with U type flitch two under flitch one (24) and the U type of U type sieve one (23) of lower surface respectively (25) A first trolley (27) is arranged below the first U-shaped blanking plate (24) and the second U-shaped blanking plate (25), the left side of the U-shaped sieve plate I (23) is fixedly connected with the right side of the U-shaped sieve plate II (50), the right and left sides of the lower surface of the U-shaped sieve plate II (50) are respectively and fixedly connected with a U-shaped blanking plate III (28) and a U-shaped blanking plate IV (30), a small cart II (29) is arranged below the U-shaped blanking plate III (28) and the U-shaped blanking plate IV (30), the left side of the U-shaped sieve plate II (50) is fixedly connected with a baffle plate (47), the left side of the baffle plate (47) is fixedly connected with a connecting rod (36), the other end of the connecting rod (36) is fixedly connected with a push plate (37), the upper surface and the lower surface of the push plate (37) are in lap joint with the inner wall of the U-shaped box (33), the bottom of the U-shaped box (33) is fixedly connected with a first support plate (32);

a first belt pulley (3) is sleeved on an output shaft of the motor (2), the first belt pulley (3) is connected with a second belt pulley (41) through a belt (42), a rotating shaft IV (40) is sleeved in the belt pulley II (41), the right end of the rotating shaft IV (40) is sleeved with a bearing II (38), the second bearing (38) is clamped on a second connecting plate (39) fixedly connected with the first supporting plate (32), a first bevel gear (43) is fixedly connected at the left end of the rotating shaft four (40), a second bevel gear (44) is meshed with the first bevel gear (43), the bevel gear II (44) is fixedly connected with one end of a rotating shaft III (34), the rotating shaft III (34) is sleeved with a bearing III (45), the bearing III (45) is clamped on the U-shaped box (33), the other end of the rotating shaft III (34) is fixedly connected with the cam (35), and the cam (35) is arranged in the U-shaped box (33).

2. The sand screening device with good screening effect for building construction according to claim 1, wherein the sand screening device comprises: the right side fixedly connected with control box (26) of supporting legs (31), be provided with the switch in control box (26), and the switch is connected with motor (2) through the electric wire.

3. The sand screening device with good screening effect for building construction according to claim 1, wherein the sand screening device comprises: the leak hole of the sieve plate (19) is larger than the leak hole of the U-shaped sieve plate II (50), and the leak hole of the U-shaped sieve plate II (50) is larger than the leak hole of the U-shaped sieve plate I (23).

4. The sand screening device with good screening effect for building construction according to claim 1, wherein the sand screening device comprises: the inclination angles of the sliding plate (22), the connecting rod (36), the U-shaped sieve plate I (23) and the U-shaped sieve plate II (50) are all 35 degrees.

5. The sand screening device with good screening effect for building construction according to claim 1, wherein the sand screening device comprises: the U-shaped blanking plate I (24) and the U-shaped blanking plate II (25) are arranged in a relatively inclined mode, the distance between the U-shaped blanking plate I (24) and the U-shaped blanking plate II (25) in the front and back mode sequentially narrows from top to bottom, the U-shaped blanking plate III (28) and the U-shaped blanking plate IV (30) are arranged in a relatively inclined mode, and the distance between the U-shaped blanking plate III (28) and the U-shaped blanking plate IV (30) in the front and back mode sequentially narrows from top to bottom.