CN113798174A

CN113798174A - Sand screening equipment for building site construction

Info

Publication number: CN113798174A
Application number: CN202111192535.XA
Authority: CN
Inventors: 张会群
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2021-12-17

Abstract

The invention relates to a sand screening device, in particular to a sand screening device for building site construction. The technical problem is as follows: the sand screening equipment for construction of the construction site is capable of improving convenience and using safety. The technical scheme is as follows: the utility model provides a building site is screening sand equipment for construction, including: the roller is symmetrically and rotatably arranged on one side of the base, and the roller is also rotatably arranged on one side of the base; the top of the base is symmetrically provided with first supporting rods; the shell is arranged between the first supporting rods; the filter screen is arranged on the shell in a sliding mode. According to the sand screening device, people push the shell, the shell is moved to the sand pile through the rolling of the roller, when sand needs to be poured into the shell, the fixing component is firstly stepped downwards, the roller is fixed by the fixing component, the roller is prevented from sliding to influence work, residual stones may exist during sand screening, the cleaning component is unlocked and rotated to be opened, the stones on the filter screen are cleaned, and the effects of improving convenience and safety are achieved.

Description

Sand screening equipment for building site construction

Technical Field

The invention relates to a sand screening device, in particular to a sand screening device for building site construction.

Background

Screening sand is an indispensable step in the construction site for building activities. The existing sand screening machine is generally widely applied to large-scale factories such as cement mixing plants and the like, has large occupied area and complex assembly, and is not suitable for being used on construction sites. The sand screening machine is usually a sand screening machine or a manual sand screening machine, or the sand screening machine is also called a dry land sand screening boat and a sand-stone separator, and is sand-stone separation equipment suitable for riverways, reservoirs and coal yards. The ship consists of a ship body, a frame, a speed reducer, a conveying belt, a rotary screen and an engine or a motor. The machine has simple structure, is economical and applicable and is easy to operate. Comprises a drum type sand screening machine, a washing drum type sand screening machine and a vibrating screen type sand screening machine. The manual sand screening is carried out by manually supporting the inclined plane gauze and then carried to the dump truck by a manual shovel for transportation, so that the process of manually screening sand usually requires a large amount of manpower, the labor intensity of workers is high, and the working efficiency is low.

Therefore, in order to solve the problem, it is necessary to design a sand screening device for construction of a construction site, which can improve convenience and safety in use.

Disclosure of Invention

In order to overcome the defects of time and labor waste and low working efficiency, the technical problem is as follows: the sand screening equipment for construction of the construction site is capable of improving convenience and using safety.

The technical scheme is as follows: the utility model provides a building site is screening sand equipment for construction, including: the roller is symmetrically and rotatably arranged on one side of the base, and the roller is also rotatably arranged on one side of the base; the top of the base is symmetrically provided with first supporting rods; the shell is arranged between the first supporting rods; the filter screen is arranged on the shell in a sliding manner; the motor is arranged at the top of the shell; the fixing component is arranged between the first supporting rod and one side of the base; the cleaning assembly is arranged on one side of the shell.

Further, the fixed subassembly includes: the first guide rods are symmetrically arranged on one side of the top of the base; a second support rod is arranged between the first guide rods in a sliding manner; the bottom of the second supporting rod is provided with a rubber pad which is matched with the roller; the first springs are symmetrically connected between the second supporting rod and the base and are respectively sleeved on the first guide rods; the first connecting rod is symmetrically and rotatably arranged on one side of the second supporting rod; the first slide rail is arranged on one side of the lower portion of the first support rod, and the first connecting rod is in sliding fit with the first slide rail.

Further, the clearance subassembly includes: the baffle is rotatably arranged on one side of the lower part of the shell; the baffle plate is provided with three second guide rods at intervals in a sliding manner; the clamping plate is arranged between the tops of the second guide rods and matched with the shell; and three second springs are uniformly connected between the clamping plate and the baffle at intervals, and are respectively sleeved on the second guide rods.

Further, still including flourishing husky subassembly, flourishing husky subassembly is including: a third guide rod is symmetrically arranged between the base and one side of the shell; a first sliding block is arranged between the first sliding block and the third guide rod in a sliding manner; the first sliding block is rotatably provided with a supporting plate; the air cylinders are symmetrically arranged in the supporting plate; the shovel plate is arranged between piston rods of the air cylinders and matched with the supporting plate; the second sliding rail is symmetrically arranged on one side of the shell; the second sliding blocks are arranged on the second sliding rails in a sliding manner; the third springs are connected between the second sliding block and the shell; the winding wheel is symmetrically arranged on the output shaft of the motor; the stay cord all is connected with the stay cord between reel and the backup pad, and the second slider is passed to the stay cord.

Further, still including pushing the subassembly, pushing the subassembly including: the shell is symmetrically provided with fourth guide rods; racks are arranged on the fourth guide rods in a sliding mode, and the racks are matched with the supporting plate; fourth springs are connected between the racks and the fourth guide rods and are sleeved on the fourth guide rods; the shell is symmetrically and rotatably provided with a gear which is meshed with the rack; the inner sides of the gears are provided with cams; the push rods are symmetrically arranged on the shell in a sliding manner and are connected with the filter screen, and the cams are matched with the push rods; the fifth springs are connected between the push rod and the shell and sleeved on the push rod; the pulley, the equal rotary type of rack upper portion inboard is equipped with the pulley, cooperates between pulley and the backup pad.

Further, still including shaking the subassembly, shake the subassembly including: the transmission shaft is rotatably arranged on one side of the bottom of the shell; the transmission shaft is uniformly provided with a plurality of turntables at intervals; the push blocks are symmetrically arranged on the rotary disc in a sliding manner and are matched with the shell; the sixth springs are connected between the push block and the rotary table and are respectively sleeved on the push block; the transmission shaft is symmetrically provided with first belt pulleys; the outer sides of the gears are provided with second belt pulleys; and the conveying belts are connected between the first belt pulley and the second belt pulley.

Further, still including locking Assembly, locking Assembly includes: the first sliding block is symmetrically provided with a first guide rod; a clamping rod is arranged between the fifth guide rods in a sliding mode, the clamping rod is matched with the support plate, and the clamping rod is matched with the shell; and the seventh spring is symmetrically connected between the clamping rod and the first sliding block and is respectively sleeved on the fifth guide rod.

Further, the motor is connected through a bolt.

The beneficial effects are that: 1. according to the sand screening device, people push the shell, the shell is moved to the sand pile through the rolling of the roller, when sand needs to be poured into the shell, the fixing component is firstly stepped downwards, the roller is fixed by the fixing component, the roller is prevented from sliding to influence work, residual stones may remain during sand screening, the cleaning component is unlocked and rotated to be opened, the stones on the filter screen are cleaned, and the effects of improving convenience and safety are achieved.

2. According to the sand sieving machine, the supporting plate is in contact with the pulley, the pulley and the rack are extruded to move downwards, the rack is meshed with the gear to drive the gear and the cam to rotate clockwise, the convex part of the cam is in contact with the push rod to drive the push rod and the filter screen to move forwards, the fifth spring is compressed, when the convex part of the cam is separated from the push rod, the push rod and the filter screen move backwards under the action of the fifth spring, and sand is sieved in a reciprocating mode.

3. According to the invention, the blanking of the supporting plate and the shovel plate is completed, the supporting plate is rotated and reset, the clamping rod is driven to move downwards to be separated from the shell when the supporting plate, the shovel plate and the first sliding block move downwards, and the clamping rod moves upwards to be contacted with the supporting plate under the action of resetting of the seventh spring to fixedly fasten the supporting plate, so that the supporting plate and the shovel plate can be prevented from accidentally overturning due to uneven sand force.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a first partial structural diagram of the present invention.

Fig. 3 is a second partial structural diagram of the present invention.

Fig. 4 is a third partial structural diagram of the present invention.

Fig. 5 is a fourth structural diagram of the present invention.

Fig. 6 is an enlarged schematic view of the structure of the present invention a.

Fig. 7 is a schematic diagram of a fifth partial structure of the present invention.

Fig. 8 is a schematic diagram of a sixth partial structure of the present invention.

Fig. 9 is a seventh partial structural diagram of the present invention.

Fig. 10 is a schematic view of an eighth partial structure of the present invention.

Part names and serial numbers in the figure: 1_ base, 2_ roller, 3_ first support bar, 4_ housing, 5_ screen, 6_ motor, 7_ stationary component, 71_ first guide bar, 72_ second support bar, 73_ rubber pad, 74_ first spring, 75_ first link, 76_ first slide, 8_ cleaning component, 81_ baffle, 82_ second guide bar, 83_ catch plate, 84_ second spring, 9_ sand pack, 91_ third guide bar, 92_ first slide, 93_ support plate, 94_ cylinder, 95_ scoop plate, 96_ second slide, 97_ second slide, 98_ third spring, 99_ reel, 910_ pull rope, 10_ pushing component, 101_ fourth guide bar, 102_ rack, 103_ fourth spring, 104_ gear, 105_ cam, 106_ push bar, 107_ fifth spring, 108_ pulley, 11_ vibration component, 111_ drive shaft, 112_ dial, 113_ push block, 114_ sixth spring, 115_ first pulley, 116_ second pulley, 117_ conveyor belt, 12_ locking assembly, 121_ fifth guide rod, 122_ clamping rod, 123_ seventh spring.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

The utility model provides a building site is screening husky equipment for construction, as shown in fig. 1-6, including base 1, gyro wheel 2, first bracing piece 3, shell 4, filter screen 5, motor 6, fixed subassembly 7 and clearance subassembly 8, the front side bilateral symmetry rotary type is equipped with gyro wheel 2 on the base 1, the rear side is also equipped with gyro wheel 2 in the rotary type on the base 1, base 1 top bilateral symmetry is equipped with first bracing piece 3, be equipped with shell 4 between the first bracing piece 3, the sliding type is equipped with filter screen 5 on the shell 4, the shell 4 top is equipped with motor 6, be equipped with fixed subassembly 7 between first bracing piece 3 and the base 1 rear side, the rear side is equipped with clearance subassembly 8 on the shell 4.

At first people promote shell 4, roll through gyro wheel 2 and remove shell 4 to sand heap, when shell 4 is poured into the sand to needs, step on with fixed subassembly 7 downwards earlier, make fixed subassembly 7 fixed with gyro wheel 2, prevent that gyro wheel 2 from sliding and influencing work, probably remain the stone when sieving the sand, unblock clearance subassembly 8 and rotatory opening this moment, clear up the stone on the filter screen 5, reach the effect that promotes convenience and security.

The fixing component 7 comprises a first guide rod 71, a second support rod 72, a rubber pad 73, a first spring 74, a first connecting rod 75 and a first slide rail 76, the first guide rod 71 is arranged on the rear side of the top of the base 1 in a bilateral symmetry mode, the second support rod 72 is arranged between the first guide rods 71 in a sliding mode, the rubber pad 73 is arranged at the bottom of the second support rod 72, the rubber pad 73 is matched with the roller 2, the first spring 74 is symmetrically connected between the second support rod 72 and the base 1, the first spring 74 is respectively sleeved on the first guide rod 71, the first connecting rod 75 is arranged on the front side of the second support rod 72 in a bilateral symmetry rotation mode, the first slide rail 76 is arranged on the rear side of the lower portion of the first support rod 3, and the first connecting rod 75 is matched with the first slide rail 76 in a sliding mode.

When people need to sieve sand, the second support rod 72 is firstly stepped downwards, the second support rod 72 and the rubber pad 73 move downwards, the first spring 74 is compressed, the rubber pad 73 is contacted with the rear side roller 2, the friction effect on the rubber pad 73 enables the roller 2 to achieve the braking effect, meanwhile, the second support rod 72 and the first link rod 75 move downwards, the first link rod 75 moves downwards on the first slide rail 76, the first link rod 75 is clamped in the concave part at the lower part of the first slide rail 76, so that when people loosen the second support rod 72, the second support rod 72 and the rubber pad 73 cannot move upwards under the action of the first link rod 75, when the shell 4 needs to be unlocked and pushed, the second support rod 72 is stepped downwards again, the first link rod 75 is separated from the concave part on the first slide rail 76, then the second support rod 72 is loosened, and under the action of the first spring 74, the second support rod 72, The rubber pad 73 and the first link 75 move upward to be reset, and the roller 2 can be rotated again after the rubber pad 73 is separated from the roller 2.

Clearance subassembly 8 is including baffle 81, second guide bar 82, cardboard 83 and second spring 84, shell 4 lower part rear side rotation formula is equipped with baffle 81, the even slidingtype three second guide bar 82 that is equipped with in interval on the baffle 81, be equipped with cardboard 83 between second guide bar 82 top, cooperate between cardboard 83 and the shell 4, even interval is connected with three second springs 84 between cardboard 83 and the baffle 81, second spring 84 suits respectively on second guide bar 82.

When the gravel and sand on the filter screen 5 need be cleared up, move cardboard 83 downwards, second spring 84 is compressed, cardboard 83 breaks away from the back with shell 4, can open baffle 81 clockwise turning, loosen cardboard 83 afterwards, cardboard 83 moves upwards under the effect of second spring 84 and resets, baffle 81 is opened and is convenient for people to clear up the gravel and sand on the filter screen 5, clearance completion back counter-clockwise turning baffle 81, cardboard 83 contacts with shell 4, extrude cardboard 83 downwards, second spring 84 is compressed, install back on the shell 4 with baffle 81 counter-clockwise, loosen cardboard 83, cardboard 83 moves upwards under the effect of second spring 84 and cooperates baffle 81 chucking fixed with the cooperation of shell 4.

Example 2

On the basis of embodiment 1, as shown in fig. 7-10, the sand container 9 further comprises a sand container 9, the sand container 9 comprises a third guide rod 91, a first slide block 92, a support plate 93, a cylinder 94, a shovel plate 95, a second slide rail 96, a second slide block 97, a third spring 98, a reel 99 and a pull rope 910, the third guide rod 91 is symmetrically arranged between the base 1 and the rear side of the housing 4, the first slide block 92 is slidably arranged between the third guide rods 91, the support plate 93 is rotatably arranged on the first slide block 92, the cylinder 94 is symmetrically arranged in the support plate 93, the shovel plate 95 is arranged between piston rods of the cylinder 94, the shovel plate 95 is matched with the support plate 93, the second slide rail 96 is symmetrically arranged on the rear side of the housing 4, the second slide block 97 is arranged on the second slide rail 96, the third spring 98 is connected between the second slide block 97 and the housing 4, the reel 99 is symmetrically arranged on an output shaft of the motor 6, a pull rope 910 is connected between the reel 99 and the support plate 93, and the pull rope 910 passes through the second slider 97.

When people need to contain sand, the air cylinder 94 is started, the piston rod of the air cylinder 94 moves backwards with the shovel plate 95, sand is collected on the shovel plate 95 through the opening formed by the shovel plate 95 and the supporting plate 93, the piston rod of the air cylinder 94 moves forwards with the shovel plate 95 under the action of the air cylinder 94, the shovel plate 95 is attached to the supporting plate 93 to fold the sand, after the weight of people is increased on the rear side of the shovel plate 95, the air cylinder 94 is closed to start the motor 6, the output shaft of the air cylinder 94 drives the winding wheel 99 to rotate clockwise, the shovel plate 95 and the supporting plate 93 are driven to move upwards through the pull rope 910, the supporting plate 93 and the first slide block 92 move upwards stably on the third guide rod 91 to convey the sand to the feeding port on the shell 4, meanwhile, the pull rope 910 drives the second slide block 97 to rotate anticlockwise when retracting upwards on the winding wheel 99, the third spring 98 is compressed, when the supporting plate 93 and the shovel plate 95 convey the sand to the feeding port on the shell 4, people firstly unload the load on the shovel plate 95, then under the action of continuously pulling the pull rope 910 upwards, the supporting plate 93 rotates clockwise under the action of the first slider 92, sand on the supporting plate 93 and the shovel plate 95 is poured into the shell 4, so semi-automatic feeding can be completed, then the motor 6 is started reversely, the pull rope 910 is loosened by anticlockwise rotation of the reel 99, under the action of the third spring 98, the second slider 97 rotates clockwise, due to gravity, the shovel plate 95, the supporting plate 93 and the first slider 92 move downwards under the action of the third guide rod 91, the pull rope 910 and the third spring 98 slow down the descending speed of the shovel plate 95 and the supporting plate 93, people are prevented from being hurt by falling too fast, and after the shovel plate 95 and the supporting plate 93 reset downwards, the motor 6 is turned off, so that the rotation of the reel 99 and the movement of the pull rope 910 can be stopped.

The filter screen pushing device further comprises a pushing assembly 10, the pushing assembly 10 comprises a fourth guide rod 101, a rack 102, a fourth spring 103, a gear 104, a cam 105, a push rod 106, a fifth spring 107 and a pulley 108, the fourth guide rod 101 is symmetrically arranged on the shell 4 in the left-right direction, the rack 102 is arranged on the fourth guide rod 101 in a sliding mode, the rack 102 is matched with the support plate 93, the fourth spring 103 is connected between the rack 102 and the fourth guide rod 101, the fourth spring 103 is sleeved on the fourth guide rod 101, the gear 104 is rotatably arranged on the shell 4 in the left-right direction, the gear 104 is meshed with the rack 102, the cam 105 is arranged on the inner side of the gear 104, the push rod 106 is slidably arranged on the shell 4 in the left-right direction, the push rod 106 is connected with the filter screen 5, the cam 105 is matched with the push rod 106, the fifth spring 107 is connected between the push rod 106 and the shell 4, the fifth spring 107 is sleeved on the push rod 106, the pulley 108 is rotatably arranged on the inner side of the upper portion of the rack 102, the pulley 108 is engaged with the support plate 93.

When the support plate 93 and the shovel plate 95 convey sand upwards to the feeding port of the shell 4, the support plate 93 is in contact with the pulley 108, the pulley 108 and the rack 102 are extruded to move downwards, the fourth spring 103 is compressed, the rack 102 is meshed with the gear 104 to drive the gear 104 to rotate clockwise with the cam 105, the convex part of the cam 105 is in contact with the push rod 106 to drive the push rod 106 and the filter screen 5 to move forwards, the fifth spring 107 is compressed, when the convex part of the cam 105 is separated from the push rod 106, the push rod 106 and the filter screen 5 move backwards under the action of the fifth spring 107, sand is sieved in a reciprocating mode, when the support plate 93 and the shovel plate 95 move downwards and are separated from the pulley 108, the pulley 108 and the rack 102 move upwards to reset under the action of the fourth spring 103, the gear 104 and the cam 105 rotate anticlockwise, the cam 105 is matched with the push rod 106 again to drive the filter screen 5 to reciprocate back and forth to sieve the sand, thus, the effect of saving manpower is achieved.

Still including vibrations subassembly 11, vibrations subassembly 11 is including transmission shaft 111, carousel 112, ejector pad 113, sixth spring 114, first belt pulley 115, second belt pulley 116 and conveyer 117, shell 4 bottom rear side rotation formula is equipped with transmission shaft 111, evenly be equipped with a plurality of carousel 112 at the interval on the transmission shaft 111, the symmetry slidingtype is equipped with ejector pad 113 on the carousel 112, cooperate between ejector pad 113 and the shell 4, all be connected with sixth spring 114 between ejector pad 113 and the carousel 112, sixth spring 114 is the suit respectively on ejector pad 113, bilateral symmetry is equipped with first belt pulley 115 on the transmission shaft 111, the gear 104 outside all is equipped with second belt pulley 116, all be connected with conveyer 117 between first belt pulley 115 and the second belt pulley 116.

When the gear 104 and the second pulley 116 rotate clockwise, the first pulley 115 and the transmission shaft 111 are driven to rotate clockwise by the transmission of the transmission belt 117, so that the turntable 112 on the transmission shaft 111 and the push block 113 rotate clockwise, the push block 113 is in contact with the shell 4 and is extruded by the shell 4 to move downwards, the sixth spring 114 is compressed, when the push block 113 is separated from the shell 4, the push block 113 moves upwards to reset, and the purpose of reciprocating to automatically knock and vibrate sand remained on the shell 4 is achieved, and when the gear 104 and the second pulley 116 rotate anticlockwise, the transmission belt 117 drives the first pulley 115, the transmission shaft 111, the turntable 112 and the push block 113 to rotate anticlockwise, so that the push block 113 continuously knocks and vibrates the shell 4.

The locking assembly 12 comprises a fifth guide rod 121, a clamping rod 122 and a seventh spring 123, the fifth guide rod 121 is symmetrically arranged on the first sliding block 92 in a left-right mode, the clamping rod 122 is slidably arranged between the fifth guide rods 121, the clamping rod 122 is matched with the supporting plate 93, the clamping rod 122 is matched with the shell 4, the seventh spring 123 is symmetrically connected between the clamping rod 122 and the first sliding block 92, and the seventh spring 123 is respectively sleeved on the fifth guide rod 121.

When the supporting plate 93 and the first slider 92 move upwards, the clamping rod 122 on the first slider 92 is driven to move upwards to be in contact with the shell 4, the clamping rod 122 is extruded by the shell 4 to move downwards, the seventh spring 123 is stretched, the clamping rod 122 is separated from the supporting plate 93, the supporting plate 93 and the shovel plate 95 can rotate to perform blanking, when the blanking of the supporting plate 93 and the shovel plate 95 is completed, the supporting plate 93 rotates to reset, when the supporting plate 93, the shovel plate 95 and the first slider 92 move downwards, the clamping rod 122 is driven to move downwards to be separated from the shell 4, under the reset action of the seventh spring 123, the clamping rod 122 moves upwards to be in contact with the supporting plate 93, the supporting plate 93 is clamped and fixed, and therefore accidental overturning caused by uneven sand force on the supporting plate 93 and the shovel plate 95 can be prevented.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The utility model provides a building site is screening sand equipment for construction which characterized in that, including:

the device comprises a base (1) and rollers (2), wherein the rollers (2) are symmetrically and rotatably arranged on one side of the base (1), and the rollers (2) are also rotatably arranged on one side of the base (1);

the top of the base (1) is symmetrically provided with first supporting rods (3);

the shell (4) is arranged between the first supporting rods (3);

a filter screen (5), wherein the filter screen (5) is arranged on the shell (4) in a sliding way;

the motor (6) is arranged at the top of the shell (4);

the fixing component (7) is arranged between the first supporting rod (3) and one side of the base (1);

a cleaning component (8), and a cleaning component (8) is arranged on one side of the shell (4).

2. A sand screening apparatus for construction at a construction site according to claim 1, wherein the fixing unit (7) comprises:

the first guide rods (71) are symmetrically arranged on one side of the top of the base (1);

the second support rod (72) is arranged between the first guide rods (71) in a sliding manner;

the rubber pad (73) is arranged at the bottom of the second supporting rod (72), and the rubber pad (73) is matched with the roller (2);

the first springs (74) are symmetrically connected between the second supporting rod (72) and the base (1), and the first springs (74) are respectively sleeved on the first guide rods (71);

the first connecting rod (75) is symmetrically and rotatably arranged on one side of the first connecting rod (75) and the second supporting rod (72);

the first sliding rail (76) is arranged on one side of the lower portion of the first supporting rod (3), and the first connecting rod (75) is in sliding fit with the first sliding rail (76).

3. A sand screening apparatus for construction at a construction site according to claim 2, wherein the cleaning assembly (8) comprises:

a baffle (81), wherein the baffle (81) is rotatably arranged on one side of the lower part of the shell (4);

the baffle plate (81) is provided with three second guide rods (82) at intervals in a sliding manner;

the clamping plate (83) is arranged between the tops of the second guide rods (82), and the clamping plate (83) is matched with the shell (4);

and three second springs (84) are uniformly connected between the second spring (84), the clamping plate (83) and the baffle (81) at intervals, and the second springs (84) are respectively sleeved on the second guide rods (82).

4. The sand screening device for construction site construction according to claim 3, further comprising a sand containing assembly (9), wherein the sand containing assembly (9) comprises:

a third guide rod (91), wherein the third guide rod (91) is symmetrically arranged between the base (1) and one side of the shell (4);

a first sliding block (92) is arranged between the first sliding block (92) and the third guide rod (91) in a sliding way;

the supporting plate (93) is arranged on the first sliding block (92) in a rotating mode;

the air cylinders (94) are symmetrically arranged in the supporting plate (93);

the shovel plate (95) is arranged between piston rods of the air cylinder (94), and the shovel plate (95) is matched with the supporting plate (93);

a second slide rail (96), wherein the second slide rail (96) is symmetrically arranged on one side of the shell (4);

the second sliding blocks (97) are arranged on the second sliding rails (96) in a sliding manner;

the third spring (98) is connected between the second sliding block (97) and the shell (4);

the winding wheel (99), the winding wheel (99) is symmetrically arranged on the output shaft of the motor (6);

the pull ropes (910) are connected between the pull ropes (910) and the reel (99) and the supporting plate (93), and the pull ropes (910) penetrate through the second sliding block (97).

5. The sand screening device for construction site construction according to claim 4, further comprising a pushing assembly (10), wherein the pushing assembly (10) comprises:

the fourth guide rod (101) is symmetrically arranged on the shell (4);

the racks (102) are arranged on the fourth guide rod (101) in a sliding mode, and the racks (102) are matched with the support plate (93);

the fourth springs (103) are connected between the racks (102) and the fourth guide rods (101), and the fourth springs (103) are sleeved on the fourth guide rods (101);

the gear (104) is symmetrically and rotatably arranged on the shell (4), and the gear (104) is meshed with the rack (102);

the cams (105) are arranged on the inner sides of the gears (104);

the push rod (106) is symmetrically and slidably arranged on the shell (4), the push rod (106) is connected with the filter screen (5), and the cam (105) is matched with the push rod (106);

the fifth springs (107) are connected between the push rod (106) and the shell (4), and the fifth springs (107) are sleeved on the push rod (106);

the pulley (108) and the inner side of the upper part of the rack (102) are rotatably provided with the pulley (108), and the pulley (108) is matched with the support plate (93).

6. The sand screening device for construction site construction according to claim 5, further comprising a vibration assembly (11), wherein the vibration assembly (11) comprises:

the transmission shaft (111) is rotatably arranged on one side of the bottom of the shell (4);

the transmission shaft (111) is uniformly provided with a plurality of turntables (112) at intervals;

the push block (113) is symmetrically and slidably arranged on the turntable (112), and the push block (113) is matched with the shell (4);

the sixth spring (114) is connected between the push block (113) and the rotary disc (112), and the sixth springs (114) are respectively sleeved on the push block (113);

the transmission shaft (111) is symmetrically provided with a first belt pulley (115);

the outer sides of the gears (104) are provided with second belt pulleys (116);

and the conveying belt (117) is connected between the first belt pulley (115) and the second belt pulley (116).

7. The sand screening apparatus for construction at a construction site according to claim 6, further comprising a locking assembly (12), wherein the locking assembly (12) comprises:

the fifth guide rod (121), the first slider (92) is symmetrically provided with the fifth guide rod (121);

the clamping rod (122) is arranged between the fifth guide rods (121) in a sliding mode, the clamping rod (122) is matched with the support plate (93), and the clamping rod (122) is matched with the shell (4);

seventh spring (123), the seventh spring (123) is connected between kelly (122) and first slider (92) symmetry, and seventh spring (123) suit is on fifth guide bar (121) respectively.

8. A sand screening apparatus for construction at a construction site according to claim 1, wherein the motor (6) is connected by bolts.