CN111054631A

CN111054631A - River sand screening plant for building

Info

Publication number: CN111054631A
Application number: CN201911270282.6A
Authority: CN
Inventors: 韩立国
Original assignee: Jinan Engineering Vocational Technical College
Current assignee: Jinan Engineering Vocational Technical College
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-04-24
Anticipated expiration: 2039-12-11
Also published as: CN111054631B

Abstract

The invention discloses a river sand screening device for buildings, which comprises a sand inlet hopper, a drying cylinder, a primary screening device and a secondary screening device, wherein the drying cylinder is arranged at the upper end of a bracket and is of a double-layer hollow structure, a heating block is arranged between the outer cylinder wall and the inner cylinder wall of the drying cylinder, one end of the drying cylinder is connected with the sand inlet hopper, the other end of the drying cylinder is communicated with the primary screening device, the primary screening device is a sand screening cylinder which is arranged on a support frame, a first screen hole is formed in the side wall of the sand screening cylinder, the secondary screening device comprises a swinging frame and a sand filtering plate, the sand screening plate is fixed at the upper end of the swinging frame, a second screen hole is formed in the sand screening plate, the swinging frame is connected with the support frame and is positioned below the sand screening cylinder, and the inclination directions of the sand screening plate and the sand screening cylinder are opposite. The problem of the mutual adhesion of the less moist sand of granule is solved, has improved work efficiency, and the screening effect improves, has improved the utilization ratio of sand, avoids extravagant, has reduced construction cost.

Description

River sand screening plant for building

Technical Field

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

Background

River sand can not be left in the building engineering, is an indispensable part in the building engineering, needs to be used as building materials in the building construction process, and needs to select sand with different particle sizes according to different construction requirements due to different sizes of the river sand particles.

The current sand screening device is mainly completed by a screen, and the sand slides from the screen to filter the sand with different diameters. However, the water content in the sand is generally high, the wet sand has certain viscosity, and the wet sand is mutually adhered, so that the screening efficiency of the existing screening device is low when the wet sand is screened, the sand needs to be screened repeatedly, and a large amount of time is wasted.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the river sand screening device for the building, which solves the problem that wet sand with small particles is adhered to each other, accelerates the screening speed and the screening rate, saves the time and improves the working efficiency.

In order to realize the purpose, the invention provides the following technical scheme:

the utility model provides a river sand screening plant for building, is including advancing husky fill, a stoving section of thick bamboo, one-level screening plant and second grade screening plant, the upper end at the bracket is installed to a stoving section of thick bamboo, and a stoving section of thick bamboo is double-deck hollow structure, is equipped with the heating block between the outer tube wall and the inner tube wall of a stoving section of thick bamboo, and the one end of a stoving section of thick bamboo even has into husky fill, and the other end and the one-level screening plant intercommunication of a stoving section of thick bamboo, a one-level screening is a screening sand section of thick bamboo, a screening sand section of thick bamboo is installed on the support frame, is equipped with first sieve mesh on the lateral wall of a screening sand section of thick bamboo, second grade screening plant includes swing span and screening sand board, screening sand board fixes the upper end at the swing span, is equipped with the second sieve mesh on.

Preferably, the bottom of the sand inlet hopper is obliquely provided with a first conveying plate connected with the drying cylinder.

Preferably, the one end of a stoving section of thick bamboo is equipped with first motor, even there is first pivot on the output shaft of first motor, in a stoving section of thick bamboo was located to first pivot, even there was the shoveling plate in the first pivot, the shoveling plate is close to the inner wall setting of a stoving section of thick bamboo, and the one end that a stoving section of thick bamboo is close to the sand outlet is equipped with the commentaries on classics piece, be equipped with the connecting axle of being connected with the commentaries on classics piece on the bracket, the other pot head of a stoving section of thick bamboo has solid fixed ring, gu be equipped with the roof.

Preferably, a second conveying plate is connected to a sand outlet of the drying cylinder, and the second conveying plate is arranged in the sand screening cylinder.

Preferably, the support frame includes fixed frame and supporting leg, the lower extreme of fixed frame is equipped with the supporting leg, and fixed frame slope sets up, in the fixed frame was located to a screening sand section of thick bamboo, the both sides of a screening sand section of thick bamboo were equipped with the first sandboard of being connected with fixed frame, be equipped with the second pivot in the screening sand section of thick bamboo, the second pivot is passed through the connecting rod and is connected with a screening sand section of thick bamboo, and the both ends and the fixed frame of second pivot are connected, be equipped with the second motor of being connected with the second pivot on the fixed frame.

Preferably, the bottom of the sand outlet end of the sand sieving cylinder is provided with a first sand outlet plate connected with the supporting legs.

Preferably, the both sides of swinging boom are equipped with the second sand board that keeps off, and the one end of swinging boom is equipped with the go-between, the go-between passes through the rotation axis and is connected with the supporting leg, the below of the other end of swinging boom is equipped with the third motor, the third motor passes through the mounting panel and is connected with the supporting leg, the top of mounting panel is equipped with the drive shaft of being connected with the supporting leg, the drive shaft is connected with the third motor, be equipped with the cam in the drive shaft, the upper end of cam is located to the swinging boom.

Preferably, one end of the swing frame, which is far away from the first sand outlet plate, is provided with a second sand outlet plate.

Preferably, the side wall of the drying cylinder is provided with a steam outlet pipe, the steam outlet pipe is connected with a steam collecting pipe, the steam collecting pipe is fixed on the inner wall of the first sand baffle through a buckle, and the tail end of the steam collecting pipe is connected with a water collecting tank.

Preferably, the below of screening sand board has the regulation bars in sliding connection, the regulation bars includes sunshade and connecting plate, and the sunshade pastes in the lower terminal surface of screening sand board and cooperates with the second sieve mesh, the polylith the sunshade passes through the connecting plate to be connected, the below of connecting plate is equipped with layer board and clamp plate, the layer board is connected with the connecting plate, and the both ends of layer board are equipped with the slider, be equipped with the screw rod on the lateral wall of swing span, the both ends of screw rod are passed through the fixed block and are connected with the swing span, and the slider cover is in the outside of screw rod, and the both sides of slider are equipped with the lock nut with screw rod complex, the both ends and the swing span of clamp plate.

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

1. according to the sand screening device, the drying treatment is carried out on the sand before screening, the problem that wet sand with smaller particles is adhered to each other can be solved by the dried sand, the mutually adhered sand particles are separated to form independent sand particle monomers, the dried sand not only can slide off more smoothly in the screening process and is convenient to convey, but also can be screened more thoroughly, the screening speed and the screening rate are increased, the working efficiency is improved, the screening effect is improved, the utilization rate of the sand is improved, the waste is avoided, and the construction cost is reduced.

2. According to the sand drying device, the shoveling plates are arranged in the drying cylinder, sand can be stirred, the uniformity of sand heating is improved, the drying speed is increased, one end of the drying cylinder can be lifted through the hydraulic cylinder, the sand discharging speed of the drying cylinder is increased, and the operation efficiency is increased.

3. According to the invention, the first sand baffles connected with the fixing frame are arranged on the two sides of the sand screening cylinder, and can shield the two sides of the sand screening cylinder, so that a sieve filtered by a first sieve mesh can be collected and guided, and the filtered sand can fall onto the sand filtering plate for secondary filtering, thereby ensuring the use reliability.

4. The sand screening device is provided with the first sand outlet plate and the second sand outlet plate, sand filtered by the sand screening cylinder and the sand filtering plate can be accumulated in different areas, mutual mixing is avoided, a guiding effect is achieved on the flowing direction of the sand, the distance between a sand pile and the supporting frame can be increased, and subsequent sand taking is facilitated.

5. According to the invention, the cam is arranged below the sand filtering plate to drive the sand filtering plate to swing, so that the sand filtering speed and the flowing speed are increased, and the working efficiency is improved.

6. According to the invention, the second sand blocking plate for blocking sand is arranged on the swing frame, so that sand on the sand filtering plate can be blocked, the sand is ensured to slide downwards along the sand filtering plate, the sand is prevented from sliding off from two sides of the sand filtering plate, and the reliability of the sand filtering process is ensured.

7. The sand drying device is provided with the steam collecting pipe, evaporated steam can be collected, secondary drying of sand is realized by using the heat of the steam, waste heat utilization is realized, cooling water is collected through the water collecting tank, and the sand drying device is used for building construction and saves water resources.

8. The adjusting grid is arranged, the second sieve mesh is shielded by sliding the adjusting grid, so that sand with different particle sizes is screened, sand with particle sizes meeting requirements can be screened out according to requirements, the screening range is enlarged, and the convenience in use is improved; the position adjusting mode of the adjusting grid is simple and reliable in fixation.

9. According to the invention, the pressing bolt connected with the connecting plate is arranged on the pressing plate, and the adjusting grid is pressed tightly through the pressing bolt, so that the shielding plate can be firmly attached to the sand filtering plate, and the use reliability is ensured.

Drawings

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

FIG. 2 is a first schematic structural view of a filtration system;

FIG. 3 is a second schematic structural view of a filtration system;

FIG. 4 is a schematic structural view of the retaining ring;

FIG. 5 is a schematic view of the connection structure of the steam collecting pipe and the first sand guard;

FIG. 6 is a schematic view of the upper structure of the secondary sand screening device;

FIG. 7 is a schematic structural view of a swing frame;

FIG. 8 is a schematic bottom structure of the secondary sand screening device;

FIG. 9 is a schematic structural view of a pallet;

FIG. 10 is a schematic view of the structure of the adjustment gate;

figure 11 is a top view of a secondary sand screening device.

In the figure: 1-a sand inlet hopper; 101-a first transport plate; 2-drying the cylinder; 201-a first motor; 202-shoveling plate; 203-a first rotating shaft; 204-a steam outlet pipe; 205-a second transport plate; 206-rotating block; 207-top plate; 208-a fixed ring; 3-heating block; 4-a steam collecting pipe; 401-buckling; 5-a bracket; 501-a hydraulic cylinder; 502-a connecting shaft; 6-screening a sand cylinder; 601-a second rotating shaft; 602-a first sieve aperture; 603-a first sand board; 604-a second motor; 605-connecting rod; 7-a water collecting tank; 8-a support frame; 801-cam; 802-a drive shaft; 803-support legs; 804-fixed frames; 805-a first sand guard; 806-a third motor; 807-mounting a plate; 9-a secondary sand screening device; 901-a swing frame; 902-sand filter; 903-second sieve mesh; 904-second sand board; 905-a second sand blocking plate; 906-connecting ring; 907-fixed block; 908-screw; 909-lock nut; 910-a platen; 911-hold down bolt; 10-a regulating grid; 1001-pallet; 1002-a slider; 1003-shielding plate; 1004-connecting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the first embodiment, the first step is,

as shown in figure 1, the river sand screening device for the building comprises a sand inlet hopper 1, a drying cylinder 2, a primary screening device and a secondary screening device 9, wherein the drying cylinder 2 is installed at the upper end of a bracket 5 and used for drying wet sand, the drying cylinder 2 is of a double-layer hollow structure, a heating block 3 is arranged between the outer cylinder wall and the inner cylinder wall of the drying cylinder 2, the heating block 3 is fixed with the inner wall of the drying cylinder 2, the heating block 3 is a cast aluminum heating block 3, a heating wire is arranged inside the heating block 3 and connected with a power supply, the heating wire generates heat after being electrified and transmits the heat to the inner wall of the drying cylinder 2 through the heating block 3, one end of the drying cylinder 2 is connected with the sand inlet hopper 1, the other end of the drying cylinder 2 is communicated with the primary screening device, the primary screening device is a sand cylinder 6, two ends of the sand screening cylinder 6 are both of an open structure and are obliquely arranged, the sand screening cylinder 6 is installed on a support frame 8, the aperture of first sieve mesh 602 is great, a sieve sand section of thick bamboo 6 carries out preliminary coarse screening, sieve the great impurity screening of granule such as stone that contains in the sand, as shown in fig. 6, second grade sieve sand device 9 includes swing span 901 and strain husky board 902, sieve husky board is fixed in the upper end of swing span 901, be equipped with second sieve mesh 903 on the sieve husky board, the aperture in second sieve screening hole is less than first sieve screening hole, swing span 901 is connected with support frame 8 and is located the below of a sieve sand section of thick bamboo 6, sieve husky board is opposite with the incline direction of a sieve sand section of thick bamboo 6, prevent that the sieve after the screening from adulterating each other.

The bottom plate of sand feeding hopper 1 is inclined, sand feeding is facilitated automatically, a first conveying plate 101 connected with a drying cylinder 2 is obliquely arranged at the bottom of sand feeding hopper 1, and sand in sand feeding hopper 1 slides into drying cylinder 2 along first conveying plate 101 under the action of gravity.

In order to improve the drying speed and effect, a first motor 201 is arranged at one end of a drying cylinder 2, a first rotating shaft 203 is connected to an output shaft of the first motor 201, the first rotating shaft 203 is arranged in the drying cylinder 2, a shoveling plate 202 is connected to the first rotating shaft 203, the shoveling plate 202 is arranged close to the inner wall of the drying cylinder 2, a rotating block 206 is arranged at one end of the drying cylinder 2 close to a sand outlet, a connecting shaft 502 connected with the rotating block 206 is arranged on a bracket 5, a fixing ring 208 is sleeved at the other end of the drying cylinder 2, as shown in fig. 4, the fixing ring 208 is a semicircular arc-shaped plate, the fixing ring 208 is connected with the drying cylinder 2 through a bolt, a top plate 207 is arranged on the fixing ring 208, a hydraulic cylinder 501 hinged with the top plate 207 is arranged on the bracket 5, the hydraulic cylinder is connected with an oil pump, the mechanical energy of a prime motor is converted, to lift one end of the drying drum 2; under the drive of the first rotating shaft 203, the shoveling plate 202 raises sand to accelerate drying speed, after drying is completed, one end of the drying cylinder 2 slowly raises by a distance through the hydraulic cylinder 501, so that the drying cylinder 2 inclines, the sand slides into the sand screening cylinder 6 under the rotation of the shoveling plate 202 and the gravity of the sand, in order to prevent the drying cylinder 2 from interfering with the first conveying plate 101 when being raised, when the first conveying plate 101 is arranged, a sufficient movable gap is left between the lower end of the first conveying plate 101 and the bottom of a sand inlet of the drying cylinder 2 to meet the lifting of the drying cylinder 2, the lifting angle of one end of the drying cylinder 2 is 10-20 degrees, and material conveying is realized by means of the self weight of the shoveling plate 202 and the sand.

In order to prevent sand from scattering and ensure that dried sand can enter the sand screening cylinder 6 more smoothly, a second conveying plate 205 is connected to a sand outlet of the drying cylinder 2, and the second conveying plate 205 is arranged in the sand screening cylinder 6.

2-3, the support frame 8 includes a fixing frame 804 and a support leg 803, the lower end of the fixing frame 804 is provided with the support leg 803, the fixing frame 804 is inclined to be set, so as to meet the requirement of the inclination of the sand screening cylinder 6, the inclination angle is 20-40 °, the inclination angle is 30 ° in the embodiment, the sand screening cylinder 6 is arranged in the fixing frame 804, two sides of the sand screening cylinder 6 are provided with a first sand blocking plate 805 connected with the fixing frame 804, the first sand blocking plate 805 is an arc-shaped plate, so as to block two sides of the sand screening cylinder 6, a second rotating shaft 601 is arranged in the sand screening cylinder 6, the second rotating shaft 601 is connected with the sand screening cylinder 6 through a connecting rod 605, two ends of the second rotating shaft 601 are connected with the fixing frame 804 through bearings, and the fixing frame 804 is provided with a second motor 604 connected.

The second motor 604 drives the sand sieving cylinder 6 to rotate through the connecting rod 605, sand entering the sand sieving cylinder 6 can accelerate the sieving speed and the falling speed under the rotation of the sand sieving cylinder 6, the aperture of the first sieve hole 602 on the sand sieving cylinder 6 is relatively large, and small stones with large particles in the sieve and fixed impurities with large particles in other sieves are mainly exposed.

In order to facilitate cleaning and collection, a first sand outlet plate 603 connected with the supporting legs 803 is arranged at the bottom of a sand outlet end of the sand sieving cylinder 6, small stone blocks or other impurities after sieving can be far away from the supporting frame 8 through the first sand outlet plate 603 and accumulated, the first sand outlet plate 603 has a guiding effect, and sand slides along the first sand outlet plate 603 to realize sand outlet at a fixed position, so that collection is facilitated.

In order to accelerate the sand screening speed, a certain swinging force is applied to the swinging frame 901, in order to prevent the sand from sliding off from two sides, two sides of a swing frame 901 are provided with second sand baffles, the swing frame 901 is arranged at a clear position, the lower end of the swing frame 901 is provided with a connecting ring 906, the connecting ring 906 is connected with a supporting leg 803 through a rotating shaft, a third motor 806 is arranged below the upper end of the swing frame 901, the third motor 806 is connected with the supporting leg 803 through a mounting plate 807, a driving shaft 802 connected with the supporting leg 803 is arranged above the mounting plate 807, two ends of the driving shaft 802 are connected with the supporting leg 803 through a bearing, the middle part of the driving shaft 802 is provided with a first gear, the output shaft of the third motor 806 is provided with a second gear meshed with the first gear, a cam 801 is fixed on the driving shaft 802, the swing frame 901 is arranged, the upper end of the swing frame 901 swings up and down through the rotation of the cam 801, so that the sand sliding and screening speed is increased.

In order to make the screened sand far away from the supporting frame 8, a second sand outlet plate 904 is arranged at one end of the swing frame 901 far away from the first sand outlet plate 603, so that the sand falling from the upper end of the sand filter plate 902 can be far away from the supporting frame 8 to be accumulated, and the sand is prevented from being mixed with the sand below the sand filter plate 902.

A worker pours sand into the sand inlet hopper 1 by means of an excavator and other tools, the sand in the sand inlet hopper 1 slides into the drying cylinder 2 along the first conveying plate 101 under the action of gravity, the heating block 3 heats the inner wall of the drying cylinder 2, the first motor 201 drives the shoveling plate 202 to rotate, stirring of the sand is achieved, the sand is in contact with the inner wall of the drying cylinder 2, absorbs heat and evaporates water, after the sand is dried, the hydraulic cylinder 501 is started to lift one end of the drying cylinder 2 by 20 degrees, at the moment, under the assistance of the self weight and the shoveling plate 202, the sand enters the sand sieving cylinder 6 from the second conveying plate 205 along the inner wall of the drying cylinder 2, the sand sieving cylinder 6 rotates under the driving of the second motor 604, the sand slides from top to bottom along the inner wall of the sand sieving cylinder 6, primary sieving of the sand is achieved through the first sieve holes 602, stones with larger particles slide from the first sand outlet plate 603, the sand passing through the first sieve holes 602 falls into the upper end of the sand filtering plate 902, the sand filtering plate 902 swings up and down along with the swing frame 901 under the action of the third motor 806, the sand slides on the sand filtering plate 902, the sand with the smaller sand diameter falls through the second sand holes, the sand with the relatively larger sand diameter slides through the second sand outlet plate 904, the screening of the sand is completed, and the sand is divided into three piles of sand with different diameters.

This application has carried out drying process to the sand before screening, the problem of the less mutual adhesion of sand of granule can be solved to the sand after the stoving, the sand grain separation that makes mutual bonding forms independent sand grain monomer, the sand after being dried is not only the landing more smooth at the screening in-process, be convenient for carry, and the screening can be more thorough in addition, screening speed and screening rate have been accelerated, work efficiency has been improved, the screening effect improves the utilization ratio that can improve the sand, avoid extravagant, construction cost is reduced.

In the second embodiment, the first embodiment of the method,

the temperature in the drying cylinder 2 is higher, and the moisture on the surface of the sand can be evaporated to form water vapor loss, so that the water resource can be collected and utilized.

As shown in fig. 1, a steam outlet pipe 204 is arranged at the upper end of the side wall of the drying drum 2, a steam collecting pipe 4 is connected to the steam outlet pipe 204, as shown in fig. 5, the steam collecting pipe 4 is fixed on the inner wall of the first sand baffle 805 through a buckle 401 and is arranged in a snake shape, and a water collecting tank 7 is connected to the tail end of the steam collecting pipe 4.

The higher vapor of temperature enters into steam collection pipe 4, and the first sand board 805 of flowing through can improve the temperature of first sand board 805 department, plays the secondary stoving effect, realizes used heat utilization, and steam is cooled into the water droplet at crooked steam collection pipe 4, finally flows into in the header tank 7, and the water of being collected can be used for in the construction, has saved the water resource.

The rest of the structure of this embodiment is the same as that of the first embodiment.

In the third embodiment, the first step is that,

on the basis of the first or second embodiment, in this embodiment, in order to meet the requirements of different constructions on the sand diameter, in order to realize the adjustment of the diameter of the second sieve holes 903, in this embodiment,

as shown in fig. 7-11, an adjusting grid 10 is slidably connected to a lower portion of a sand sieving plate, the adjusting grid 10 includes a shielding plate 1003 and a connecting plate 1004, the shielding plate 1003 is attached to a lower end surface of the sand sieving plate and is matched with a second sieve pore 903, in this embodiment, the second sieve pore 903 is a square pore, the shielding plate 1003 is used for shielding the second sieve pore 903, so as to adjust an opening size of the second sieve pore 903, a plurality of shielding plates 1003 are connected through the connecting plate 1004, a supporting plate 1001 and a pressing plate 910 are arranged below the connecting plate 1004, the supporting plate 1001 is connected with the connecting plate 1004, two ends of the supporting plate 1001 are provided with sliders 1002, side walls of the swing frame 901 are provided with screws 908, two ends of the screws 908 are connected with the swing frame 901 through the fixing blocks 907, the sliders 1002 are sleeved outside the screws 908 and are slidably matched with the screws 908, two sides of the sliders 1002 are provided with locking nuts 909 matched with the screws 908, the adjusting, in order to ensure that the shielding plate 1003 is tightly attached to the sand filtering plate 902, a pressing plate 910 is arranged below the adjusting grid 10, two ends of the pressing plate 910 are welded to the swinging frame 901, and a pressing bolt 911 connected with the connecting plate 1004 is arranged on the pressing plate 910.

The length of a side of second sieve mesh 903 is the biggest size of passing through, when needing to screen the less sand of particle diameter, loosen lock nut 909 and clamp bolt 911, slip adjustment bars 10, sunshade 1003 shelters from second sieve mesh 903, along with sunshade 1003 shelters from second sieve mesh 903, the sieve sand hole becomes the rectangle, and the rectangular width is the sand particle diameter that allows, the length of a side size of second sieve mesh 903 subtracts the width size that shelters from of sunshade 1003, adjust the back that finishes, fix slider 1002 through lock nut 909, realize the rigidity of adjusting bars 10, then through rotating clamp bolt 911, will adjust bars 10 firmly and press on straining sand board 902, make sunshade 1003 and straining sand board 902 closely laminate.

Realized the regulation to second sieve mesh 903 aperture trafficability characteristic through adjusting bars 10, can come the sand grain of screening different diameters as required, increased the husky scope of sieve, improved the convenience of use.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a river sand screening plant for building which characterized in that: including advancing husky fill, a stoving section of thick bamboo, one-level screening plant and second grade screening sand device, a stoving section of thick bamboo is installed in the upper end of bracket, and a stoving section of thick bamboo is double-deck hollow structure, is equipped with the heating block between the outer tube wall and the inner tube wall of a stoving section of thick bamboo, and the one end of a stoving section of thick bamboo even has into husky fill, and the other end and the one-level screening plant intercommunication of a stoving section of thick bamboo, a one-level screening is a screening sand section of thick bamboo, a screening sand section of thick bamboo is installed on the support frame, is equipped with first sieve mesh on the lateral wall of a screening sand section of thick bamboo, second grade screening sand device includes swing span and sand screen, the upper end at the swing span is fixed to the sand screen, is equipped with the second sieve mesh on the sand.

2. A river sand screening device for construction as claimed in claim 1, wherein: the bottom of the sand inlet hopper is obliquely provided with a first conveying plate connected with the drying cylinder.

3. A river sand screening device for construction as claimed in claim 1, wherein: the one end of a stoving section of thick bamboo is equipped with first motor, even there is first pivot on the output shaft of first motor, in a stoving section of thick bamboo was located to first pivot, even there was the shoveling plate in the first pivot, the shoveling plate is close to the inner wall setting of a stoving section of thick bamboo, and the one end that a stoving section of thick bamboo is close to the sand outlet is equipped with the commentaries on classics piece, be equipped with the connecting axle of being connected with the commentaries on classics piece on the bracket, the other pot head of a stoving section of thick bamboo has solid fixed ring, gu be equipped with the.

4. A river sand screening device for construction as claimed in claim 1, wherein: and a second conveying plate is connected to a sand outlet of the drying cylinder and is arranged in the sand screening cylinder.

5. A river sand screening device for construction as claimed in claim 1, wherein: the support frame is including fixed frame and supporting leg, the lower extreme of fixed frame is equipped with the supporting leg, and fixed frame slope sets up, in the fixed frame was located to a screening sand section of thick bamboo, the both sides of a screening sand section of thick bamboo were equipped with the first sand board of being connected with fixed frame, be equipped with the second pivot in the screening sand section of thick bamboo, the second pivot is passed through the connecting rod and is connected with a screening sand section of thick bamboo, and the both ends and the fixed frame of second pivot are connected, be equipped with the second motor of being connected with the second pivot on the fixed.

6. A river sand screening device for construction as claimed in claim 5, wherein: the bottom of the sand outlet end of the sand sieving cylinder is provided with a first sand outlet plate connected with the supporting legs.

7. A river sand screening device for construction as claimed in claim 5, wherein: the both sides of swinging boom are equipped with the second and keep off the sand board, and the one end of swinging boom is equipped with the go-between, the go-between passes through the rotation axis and is connected with the supporting leg, the below of the other end of swinging boom is equipped with the third motor, the third motor passes through the mounting panel and is connected with the supporting leg, the top of mounting panel is equipped with the drive shaft of being connected with the supporting leg, the drive shaft is connected with the third motor, be equipped with the cam in the drive shaft, the upper end of cam is located to the.

8. The river sand screening device for construction as claimed in claim 6, wherein: and a second sand outlet plate is arranged at one end of the swinging frame, which is far away from the first sand outlet plate.

9. A river sand screening device for construction as claimed in claim 5, wherein: the side wall of the drying cylinder is provided with a steam outlet pipe, the steam outlet pipe is connected with a steam collecting pipe, the steam collecting pipe is fixed on the inner wall of the first sand baffle through a buckle, and the tail end of the steam collecting pipe is connected with a water collecting tank.

10. A river sand screening device for construction as claimed in claim 1, wherein: the utility model discloses a screening sand plate, including the screening sand plate, the below of screening sand plate has adjusting grid, adjusting grid includes sunshade and connecting plate, and the sunshade pastes in the lower terminal surface of screening sand plate and cooperates with the second sieve mesh, the polylith the sunshade passes through the connecting plate to be connected, the below of connecting plate is equipped with layer board and clamp plate, the layer board is connected with the connecting plate, and the both ends of layer board are equipped with the slider, be equipped with the screw rod on the lateral wall of swing span, the both ends of screw rod are passed through the fixed block and are connected with the swing span, and the slider cover is in the outside of screw rod, and the both sides of slider are equipped with the lock nut with screw rod complex.