CN111687044A

CN111687044A - Gravel and sand centrifugation screening equipment for building engineering

Info

Publication number: CN111687044A
Application number: CN202010568749.1A
Authority: CN
Inventors: 杨木俭
Original assignee: Individual
Current assignee: Tajiang Construction Co ltd
Priority date: 2020-06-20
Filing date: 2020-06-20
Publication date: 2020-09-22
Anticipated expiration: 2040-06-20
Also published as: CN111687044B

Abstract

The invention provides a sand and stone centrifugal screening device for construction engineering, which comprises a rectangular hollow frame capable of traveling, a separating device and a conveying device, wherein one end of the frame in the length direction is the front end in the traveling direction, the other end of the frame in the length direction is the rear end in the traveling direction, the separating device is fixedly arranged on the upper end surface of the frame and is arranged close to the front end of the frame, the conveying device is fixedly arranged on the upper end surface of the frame and is arranged close to the rear end of the frame, the conveying device is used for supplying sand and stone to the separating device, the separating device is used for carrying out drying centrifugal separation treatment on the sand and stone and firstly discharging the sand and then discharging the stone outwards, the separating device comprises a sieve tray with a tray bottom capable of being opened upwards in a floating manner, the sieve tray is driven to rotate to screen out the sand and firstly discharge the sieve outwards, then, the sieve tray bottom of the sieve tray is opened to discharge the stone, and simultaneously an air drying mechanism and a heater can carry, the beneficial effect is that the sand and stone are prevented from being difficult to separate due to moisture agglomeration.

Description

Gravel and sand centrifugation screening equipment for building engineering

Technical Field

The invention relates to the technical field of sand and stone separation, in particular to sand and stone centrifugal screening equipment for constructional engineering.

Background

In the building industry, a sand and stone separating device is one of the devices which are frequently used, the sand and stone separating device is one of the devices for separating sand from stones, and along with the development of science and technology, various sand and stone separating devices appear in the market. Through the applicant search discovery a chinese utility model patent "a dustless formula sand stone separating centrifuge", its patent number is CN205613680U, and it includes pan feeding mouth, universal auto-lock wheel and control panel, and affiliated pan feeding mouth is installed in the left side of shell body, the inside of shell body is provided with the cylinder, the surface of cylinder be provided with the wire netting, the surface of shell body is provided with out husky mouth, control panel fixed mounting is on the right side of going out husky mouth, realizes the separation to sand and stone through the rotation of cylinder. The sand-gravel separation device has the disadvantages that 1, sand and stones are mostly located outdoors, the sand and stones are easy to be wet and are adhered to each other to form blocks, and the sand and stones are difficult to be fully filtered and separated; 2. a large amount of sand is adhered to the stones, so that the waste of sand resources is caused; 3. the wet sand is easy to block the meshes of the wire netting, so that the wire netting loses the sand screening function; 4. the discharge of stones is inconvenient, manual operation is needed, and the sand and stone separation efficiency is reduced. In order to overcome the defects in the prior art, the sand and stone centrifugal screening equipment for the building engineering is simple and reliable in principle and has the functions of automatic drying and automatic material discharging.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide the sand and stone centrifugal screening equipment for the building engineering, which has a simple and reliable principle and automatic drying and automatic discharging functions, and aims to solve the technical problems that in the prior art, sand and stone are easy to wet and are adhered to each other to form blocks, and the sand and stone are difficult to be fully filtered and separated.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

A sand and stone centrifugal screening device for construction engineering comprises a rectangular hollow frame capable of traveling, a separating device and a conveying device, wherein one end of the frame in the length direction is the front end of the traveling direction, the other end of the frame in the length direction is the rear end of the traveling direction, the separating device is fixedly arranged on the upper end face of the frame and is arranged close to the front end of the frame, the conveying device is fixedly arranged on the upper end face of the frame and is arranged close to the rear end of the frame, the conveying device is used for supplying sand and stone to the separating device, and the separating device is used for performing drying centrifugal separation treatment on the sand and stone, discharging sand outwards and then discharging stone outwards;

the separating device comprises a cylindrical fixed cylinder which is fixedly arranged on the upper end surface of the frame and is provided with an opening vertically and upwards, a fixed ring is coaxially and fixedly arranged on the inner circular surface of the fixed cylinder and fixedly connected with the inner circular surface of the fixed cylinder into a whole, the fixed ring is positioned in the middle of the fixed cylinder along the height direction of the fixed cylinder, a truncated cone-shaped sieve tray with an opening vertically and upwards is coaxially and rotatably arranged in the fixed cylinder and can be heated, the sieve tray is sleeved in the fixed ring and is in rotating connection and matching with the fixed ring, the opening of the sieve tray is gradually increased along the vertical direction from bottom to top, the sieve tray is composed of a truncated cone-shaped steel sieve net, an external boss, an internal boss and a tray bottom capable of floating up and down, the sieve net is of a truncated cone-shaped steel wire mesh structure with openings at the upper end and the lower end, an acute included angle formed by a generatrix of a cone where the sieve net is positioned, the built-in boss is an annular body and is coaxially and fixedly connected with the inner circular surface of the opening at the lower end of the screen, the tray bottom and the built-in boss are combined in an initial state and seal and block an opening formed at the inner circular surface of the built-in boss, the tray bottom can float upwards and relieve the seal and block of the opening formed at the inner circular surface of the built-in boss, the upper end surface of the tray bottom is provided with a conical structure, a sharp end formed by the conical structure is vertically and upwards arranged, and an acute included angle formed by a generatrix of a cone where the upper end surface of the tray bottom is located and an axis is 75-80 degrees.

As a further optimization or improvement of the present solution.

But solid fixed ring's up end inlays and is equipped with rolling ball, the ball is provided with a plurality ofly and arrange along solid fixed ring place circumferencial direction array, external boss is located solid fixed ring's top and the ball is with the lower terminal surface of external boss and solid fixed ring's up end roll connection cooperation, external boss is laminated mutually with the interior disc of solid fixed cylinder, coaxial fixed annular electric heater that is provided with on solid fixed ring's the interior disc, the heater contacts with the screen cloth and can be with heat conduction to screen cloth fast, built-in boss and the bottom of a plate, the screen cloth, built-in boss and the bottom of a plate are the material that the heat conductivility is good.

As a further optimization or improvement of the present solution.

The upper end face of the built-in boss is provided with a triangular-structure meshing groove which penetrates through the inner circular face of the built-in boss, the meshing groove is provided with a plurality of meshing blocks which are arranged in an array mode along the circumferential direction where the built-in boss is located, the diameter of the disc bottom is equal to that of the inner circular face of the built-in boss, the outer circular face of the disc bottom is fixedly provided with a triangular-structure meshing block which protrudes outwards in the radial direction, the meshing blocks are matched with the meshing groove, the meshing blocks are arranged in an array mode along the circumferential direction where the disc bottom is located and correspond to the meshing grooves in a one-to-one mode, the meshing blocks are combined with the meshing groove in the initial state, the disc bottom and the screen cloth can rotate synchronously, and.

As a further optimization or improvement of the present solution.

The fixed cylinder internal fixation is provided with the oblique board of arranging of slope, the contained angle that constitutes between oblique board and the horizontal plane is between 45 to 60, it cuts apart into two upper and lower independent cavities with the fixed cylinder to put the board to one side, it is located the below of sieve tray to put the board to one side, the fixed row who is provided with the slope and arranges downwards on the outer disc of fixed cylinder fights, arrange the bin hopper and put the slope lower extreme of board to one side to align and both inclination directions, the angle is unanimous, arrange the front end of the directional frame of slope lower extreme of fighting and putting the board to one side, set up the bin outlet of the inside and outside rectangle that runs through on the outer disc of fixed cylinder, the bin outlet is located between oblique board and the bin hopper and is connected the switch-on with the slope upper end of arranging the slope lower extreme of oblique board and arranging the bin hopper.

As a further optimization or improvement of the present solution.

Separator still including the coaxial air-dry mechanism that sets up in the solid fixed cylinder top, the coaxial actuating mechanism that sets up in the solid fixed cylinder and be located the sieve tray below, the upper end of air-dry mechanism is input and conveyor's output link, the lower extreme is the output and the output is located the sieve tray open-ended directly over, air-dry mechanism is used for falling by its input to the gravel and sand mixture between the output air-dry processing and will air-dry the even discharge of gravel and sand to the sieve tray of back, actuating mechanism is used for the drive plate to rotate around self axis direction at the bottom of the drive plate or the drive plate is at the bottom of upwards floating along self axis direction.

As a further optimization or improvement of the present solution.

The air drying mechanism comprises a cylindrical step-shaped thin-wall air drying cylinder which is coaxial with the fixed cylinder and fixedly connected with the opening of the fixed cylinder, openings at the upper end and the lower end of the air drying cylinder are coaxially and fixedly provided with a cylindrical funnel, the opening of the funnel is gradually reduced from top to bottom along the vertical direction, a rotating shaft is coaxially and rotatably arranged in the air drying cylinder, a fan assembly is coaxially and fixedly sleeved on the rotating shaft, the fan assembly is provided with three groups and is arranged in an equidistant array along the axial direction of the rotating shaft, the fan assembly comprises a sleeve which is coaxially and fixedly sleeved on the rotating shaft and blades which are fixedly connected with the outer circular surface of the sleeve, the blades are arranged into a rectangular thin-wall plate body structure, one end of each blade is fixedly connected with the outer circular surface of the sleeve, the other end of each blade extends to the inner circular surface of the, the six blades are arranged in an array along the circumferential direction of the sleeve;

the air drying cylinder comprises a bottom cylinder, a middle cylinder and a top cylinder which are sequentially connected and communicated from bottom to top, the diameters of the bottom cylinder, the middle cylinder and the top cylinder are sequentially reduced, the inner diameter of the bottom cylinder is equal to that of an opening of the screen disc and the bottom cylinder and the top cylinder are coaxially arranged, an opening at the lower end of the bottom cylinder is an output end of the air drying mechanism, a funnel is connected and communicated with an opening at the upper end of the top cylinder and is positioned at an input end of the air drying mechanism, the fan assemblies are respectively positioned at the middle position of the bottom cylinder along the height direction of the bottom cylinder, the middle position of the middle cylinder along the height direction of the middle cylinder and the middle position of the top cylinder along the height direction, blades positioned in the bottom cylinder extend to the inner circular surface of the bottom cylinder, blades positioned in the middle cylinder extend to the inner circular surface;

the center of the upper opening of the top cylinder is provided with a conical fixed block, the upper end face of the fixed block is arranged in a sharp shape, the lower end face of the fixed block is arranged in a horizontal shape, connecting arms for fixedly connecting the outer circular face of the fixed block and the inner circular face of the upper opening of the top cylinder are arranged between the outer circular face of the fixed block and the inner circular face of the upper opening of the top cylinder, four connecting arms are arranged and arranged in an array manner along the circumferential direction of the top cylinder, a blanking port is formed between every two adjacent connecting arms, and the top end of the;

the bottom cylinder is located above the fixed cylinder, an air inlet is formed between the bottom cylinder and the fixed cylinder, a Z-shaped supporting leg is fixedly connected with the bottom cylinder at the lower end opening and the upper end opening of the fixed cylinder, one end of the supporting leg is fixedly connected with the bottom cylinder at the lower end opening through a bolt, the other end of the supporting leg is fixedly connected with the upper end opening of the fixed cylinder through a bolt, the supporting leg comprises two ninety-degree bending positions, one of the bending positions is provided with a first reinforcing rib, the other bending position is provided with a second reinforcing rib, and the supporting legs are provided with a plurality of supporting legs and are arranged in an array mode.

As a further optimization or improvement of the present solution.

The driving mechanism comprises a sealing cylinder, a main motor and an air cylinder, wherein the upper end and the lower end of the sealing cylinder are sealed, the sealing cylinder is coaxially and fixedly connected with the bottom of the fixed cylinder, one end of the sealing cylinder is positioned below the inclined plate, the other end of the sealing cylinder is positioned above the inclined plate, the main motor is fixedly arranged in the sealing cylinder, an output shaft of the main motor is vertically and upwards coaxially arranged with the sieve tray, the air cylinder is arranged between an output shaft of the main motor and the tray bottom, one end of the air cylinder is coaxially and fixedly connected with the output shaft of the main motor, and the other end of the;

the air cylinder comprises a cylindrical cylinder body and a piston rod, a circular bottom plate which is in sealing connection and matching with the opening at the lower end of the cylinder body is coaxially and fixedly arranged at the opening at the upper end of the cylinder body, and a circular ventilating top plate is coaxially and fixedly arranged at the opening at the upper end of the cylinder body; the cylinder body is close to and has offered annular butt joint groove on the excircle face of its lower extreme coaxially, and the tank bottom in butt joint groove offers the air supply hole of being connected the switch-on with the air chamber, and the air supply hole is provided with a plurality ofly and arranges along cylinder body place circumferencial direction array, and the annular notch department in butt joint groove cup joints the annular butt joint pipe rather than being connected the switch-on, and the butt joint pipe constitutes sealed rotation connection cooperation with the butt joint groove, and the butt joint pipe is fixed in the sealed cylinder and is connected the switch-on by air supply pipe.

As a further optimization or improvement of the present solution.

Be provided with the transmission shaft of connecting both between the lower extreme of dish end and rotation axis, the transmission shaft is the quill shaft and its inside is provided with internal spline, and the lower extreme of transmission shaft is the input and this end and the coaxial fixed connection of the up end of dish end, the upper end of transmission shaft be the output and this end is coaxial cup joints on the lower extreme of rotation axis, is provided with the external spline on the outer disc of the lower extreme of rotation axis, and the external spline combines together with the internal spline and both can slide from top to bottom along vertical direction.

As a further optimization or improvement of the present solution.

The conveying device comprises a mounting frame fixedly arranged on the upper end surface of the rack, a first extending frame horizontally extending along the front end of the traveling direction of the rack is fixedly arranged at the top of the mounting frame, a second extending frame horizontally extending along the rear end of the traveling direction of the rack is fixedly arranged at the bottom of the mounting frame, the first extending frame is equal in height to the funnel and is inserted into the funnel through a rectangular opening formed in the outer circumferential surface of the funnel, a driving roller is rotatably arranged at the joint of the second extending frame and the mounting frame, a driven roller is rotatably arranged at the end part of the extending end of the second extending frame, a driven roller is rotatably arranged at the joint of the first extending frame and the mounting frame, a third driven roller is rotatably arranged at the end part of the extending end of the first extending frame, the axial directions of the driving roller, the first driven roller, the second driven roller and the third driven roller are all parallel to the width direction of the rack, and the driving roller, the first, the conveying belt forms a parallelogram inclined towards the hopper, a rectangular charging hopper with an opening arranged away from the conveying belt is fixedly arranged on the conveying belt, and a plurality of charging hoppers are arranged in an array at equal intervals along the running direction of the conveying belt;

the conveying device also comprises a conveying motor fixedly arranged on the rack, the axial direction of an output shaft of the conveying motor is parallel to the axial direction of the driving roller, a belt transmission assembly for connecting the output shaft of the conveying motor and the driving roller is arranged between the output shaft of the conveying motor and the driving end of the driving roller, the belt transmission assembly comprises a driving belt wheel coaxially and fixedly sleeved on the output shaft of the conveying motor, a driven belt wheel coaxially and fixedly sleeved on the driving end of the driving roller and a belt wound between the driving belt wheel and the driven belt wheel;

the fixed connecting band that is provided with in bottom of loading hopper and connecting band arrange along the width direction of conveyer belt, and the connecting band is provided with two side by side and keeps away from the setting each other, connecting band and conveyer belt fixed connection, the bottom of loading hopper and connecting band rigid coupling are as an organic whole and make by the rubber materials of high elasticity.

As a further optimization or improvement of the present solution.

The front wheel comprises a first retainer rotationally connected and matched with the rack and a driving roller rotationally arranged on the first retainer, a hinged shaft formed at the rotational joint of the first retainer and the rack is axially and vertically arranged, a hub motor capable of driving the first retainer is arranged in the driving roller and is powered and driven by a storage battery, the rear wheel comprises a second retainer rotationally connected and matched with the rack and a driven roller rotationally arranged on the second retainer, and the hinged shaft formed at the rotational joint of the second retainer and the rack is axially and vertically arranged;

the fixed baffle that is provided with the downward sloping and arranges in front end of frame, the fixed rectangular plate guardrail that is provided with vertical arrangement in both sides of baffle, the guardrail is relevant to be close to a side and has seted up the draw-in groove, the lower extreme of draw-in groove extends to baffle department, the upper end runs through the backplate, be provided with between two guardrails with draw-in groove joint complex and one end open-ended rectangle pannier, the tip of pannier is pegged graft in the draw-in groove, the opening of pannier upwards arranges along the incline direction of baffle, the lower extreme of arranging the hopper aligns with.

Compared with the prior art, the invention has the advantages that;

1. the principle is simple and reliable, the heatable sieve tray is used for centrifugally separating sand and stones, and the caking sand and stones can be scattered, air-dried, dried and the like, so that the wet sand and stones are dried, and the problem that the sand and stones are adhered to each other to cause incapability of fully filtering and separating is effectively avoided;

2. the bottom of the sieve tray can be opened upwards in a floating manner, so that stones retained in the sieve tray are automatically discharged outwards, and the sand and stone separation efficiency is greatly improved;

3. the screen tray is intermittently fed by the conveying device, the separation of the sand and the stone which are fed last time is completed within the intermittent feeding time, and the automation degree is high;

4. the complete machine possesses the electronic function of marcing, is convenient for remove with the position of trading the operation, promotes and uses convenience and flexibility.

Drawings

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

Fig. 2 is a schematic structural diagram of the rack.

Fig. 3 is a schematic structural view of the front wheel.

Fig. 4 is a schematic structural view of the rear wheel.

Fig. 5 is a schematic structural view of the towing handle.

Fig. 6 is a matching view of the basket and the frame.

Fig. 7 is a schematic structural view of the separation device.

Fig. 8 is a partial structural view of the separation device.

Fig. 9 is a schematic view of the internal structure of the separation apparatus.

Fig. 10 is a schematic view of the internal structure of the separation apparatus.

Fig. 11 is an exploded view of the screen tray and the stationary canister.

Fig. 12 is a schematic structural view of a sieve tray.

Fig. 13 is a schematic structural view of a sieve tray.

Fig. 14 is a structural diagram of the tray bottom.

Figure 15 is an exploded view of a screen tray.

Fig. 16 is a view showing the air drying mechanism and the fixed cylinder.

Fig. 17 is a schematic structural view of the seasoning mechanism.

Fig. 18 is a schematic view of the internal structure of the seasoning mechanism.

Fig. 19 is a schematic view of the internal structure of the seasoning mechanism.

Fig. 20 is a schematic structural diagram of the fan assembly.

Fig. 21 is a schematic structural view of the supporting foot.

Fig. 22 is a schematic structural view of the drive mechanism.

FIG. 23 is a view of the drive mechanism in cooperation with the tray bottom.

Fig. 24 is a schematic structural view of the drive mechanism.

Fig. 25 is a sectional view of the cylinder.

Fig. 26 is a schematic diagram of a structure in which a drive mechanism drives a tray bottom to float.

Fig. 27 is a view showing the engagement of the transmission shaft with the rotary shaft and the tray bottom.

Fig. 28 is a view of the delivery device in cooperation with a funnel.

Fig. 29 is a schematic structural view of the conveying device.

FIG. 30 is a schematic view of the hopper construction.

Represented in the figure as:

100. a frame; 101. a front wheel; 101a, a first retainer; 101b, a driving roller; 102. a rear wheel; 102a and a second retainer; 102b, a driven roller; 103. a towing handle; 104. a guide plate; 105. a guardrail; 106. a card slot; 107. a basket; 110. a control panel; 120. a drawer;

200. a separation device; 201. a fixed cylinder; 202. a fixing ring; 202a, a heater; 202b, a ball; 203. a sieve tray; 203a, a screen mesh; 203b, an external boss; 204. a plate bottom; 205a, an engagement groove; 205b, an engagement block; 205c, a via; 206. obliquely placing a plate; 207. a discharge hopper; 208. a vibrator; 209. a discharge outlet; 210. an air drying mechanism; 211. air-drying the cylinder; 211a, a bottom cylinder; 211b, an intermediate cylinder; 211c, a top cylinder; 212. a funnel; 213. a fixed block; 214. a connecting arm; 215. a rotating shaft; 216. a fan assembly; 216a, a sleeve; 216b, a blade; 217. supporting legs; 217a, a first reinforcing rib; 217b and a second reinforcing rib; 220. a drive mechanism; 221. a sealing cylinder; 222. a main motor; 223. a cylinder; 223a, a cylinder body; 223b, a bottom plate; 223c, a top plate; 224. a piston rod; 224a, a piston; 224b, a telescopic rod; 225. a butt joint groove; 226. an air supply hole; 227. butt-joint pipes; 228. a gas supply pipe; 229. a drive shaft;

300. a conveying device; 301. a mounting frame; 301a, a first extension frame; 301b, a second extension frame; 302. a driving roller; 303. a driven roller I; 304. a driven roller II; 305. a driven roller III; 306. a conveyor belt; 307. a hopper; 307a, a connecting band; 308. a conveying motor; 309. a belt drive assembly.

Detailed Description

Referring to fig. 1 to 30, a sand centrifugal screening apparatus for construction engineering comprises a rectangular hollow frame 100, a separating device 200 and a conveying device 300, wherein one end of the frame 100 along the length direction is a front end of the advancing direction, the other end of the frame 100 along the length direction is a rear end of the advancing direction, the separating device 200 is fixedly arranged on the upper end face of the frame 100 and is arranged close to the front end of the frame 100, the conveying device 300 is fixedly arranged on the upper end face of the frame 100 and is arranged close to the rear end of the frame 100, the conveying device 300 is used for supplying sand to the separating device 200, and the separating device 200 is used for performing drying centrifugal separation treatment on the sand and firstly discharging sand outwards and then discharging the sand outwards.

Referring to fig. 10-15, the separating device 200 includes a cylindrical fixed cylinder 201 fixedly disposed on the upper end surface of the frame 100 and having an opening disposed vertically upward, a fixed ring 202 is coaxially and fixedly disposed on the inner circumferential surface of the fixed cylinder 201 and fixedly connected to the inner circumferential surface of the fixed cylinder 201, the fixed ring 202 is located at the middle position of the fixed cylinder 201 along the height direction thereof, a circular truncated cone-shaped sieve tray 203 having an opening disposed vertically upward is coaxially and rotatably disposed in the fixed cylinder 201, the sieve tray 203 can be heated, the sieve tray 203 is sleeved in the fixed ring 202 and rotatably connected to the fixed ring 202, the opening of the sieve tray 203 is gradually increased from bottom to top along the vertical direction, the sieve tray 203 is composed of a circular truncated cone-shaped steel sieve mesh 203a, an external boss 203b, an internal boss and a vertically floating tray bottom 204, the sieve mesh 203a is a circular truncated cone-shaped steel wire mesh structure having openings at the upper and lower ends, an acute angle formed by a generatrix of the circular cone where the, the external boss 203b is an annular body and is coaxially and fixedly connected with the outer circular surface at the opening of the upper end of the screen mesh 203a, the internal boss is an annular body and is coaxially and fixedly connected with the inner circular surface at the opening of the lower end of the screen mesh 203a, the tray bottom 204 and the internal boss are combined in an initial state and seal and block the opening formed at the inner circular surface of the internal boss, the tray bottom 204 can float upwards and relieve the seal and block of the opening formed at the inner circular surface of the internal boss, in order to facilitate the sliding and discharging of stones retained on the tray bottom 204, the upper end surface of the tray bottom 204 is set into a conical structure, the sharp end formed by the conical structure is vertically and upwards arranged, the acute included angle formed by the generatrix of the cone on the upper end surface of the tray bottom 204 and the axis is 75-80 degrees, the sand-stone mixture body generates centrifugal motion by driving the screen disc 203 to rotate, and sand falls and is discharged through the mesh, the stones will be retained in the sieve tray 203, so as to realize the separation of sand and stones, when the sand separation is finished, the driving tray bottom 204 floats upwards and releases the sealing blockage of the opening formed at the inner circular surface of the built-in boss, and the stones will automatically slide towards the edge of the tray bottom 204 and be discharged from the opening formed at the inner circular surface of the built-in boss.

Specifically, referring to fig. 11, rollable balls 202b are embedded in the upper end surface of the fixing ring 202, the balls 202b are provided with a plurality of balls and are arranged in an array along the circumferential direction of the fixing ring 202, the external boss 203b is located above the fixing ring 202, the balls 202b enable the lower end surface of the external boss 203b to be in rolling connection and matching with the upper end surface of the fixing ring 202, the external boss 203b is attached to the inner circular surface of the fixing cylinder 201, an annular electrothermal heater 202a is coaxially and fixedly arranged on the inner circular surface of the fixing ring 202, the heater 202a is in contact with the screen 203a and can rapidly conduct heat to the screen 203a, the internal boss and the tray bottom 204, and the screen 203a, the internal boss and the tray bottom 204 are made of materials with good heat conductivity, the sieve tray 203 is supported by rolling balls 202b, and the sieve tray 203 is heated by a heater 202a, so that the sieve tray 203 dries the wet sand and stone mixture.

Specifically, referring to fig. 15, in order to facilitate the matching and sealing between the disc bottom 24 and the built-in boss, a triangular engaging groove 205a is formed on the upper end surface of the built-in boss, the engaging groove 205a penetrates through the inner circular surface of the built-in boss, the engaging grooves 205 are provided with a plurality of engaging blocks 205 arranged in an array along the circumferential direction of the built-in boss, the diameter of the disc bottom 204 is equal to the diameter of the inner circular surface of the built-in boss, a triangular engaging block 205b protruding outward along the radial direction of the disc bottom 204 is fixedly provided on the outer circular surface of the disc bottom 204, the engaging blocks 205b are adapted to the engaging groove 205a, the engaging blocks 205b are arranged in an array along the circumferential direction of the disc bottom 204 and correspond to the engaging grooves 205a one by one, the engaging blocks 205b are combined with the engaging groove 205a in the initial state, the disc bottom 204 and the screen mesh 203a can rotate synchronously, in order to avoid sand accumulated at the bottom of the engaging groove 205, the bottom of the engaging groove 205a is provided with a through hole 205c which vertically penetrates through the built-in boss.

Referring to fig. 10, in order to discharge the separated sand and stones from the fixed cylinder 201, an inclined plate 206 is fixedly disposed in the fixed cylinder 201, an included angle formed between the inclined plate 206 and a horizontal plane is 45 ° to 60 °, the inclined plate 206 divides the fixed cylinder 201 into two independent chambers, the inclined plate 206 is located below the sieve tray 203, a discharge hopper 207 is fixedly disposed on an outer circumferential surface of the fixed cylinder 201, the discharge hopper 207 is aligned with an inclined lower end of the inclined plate 206, and the inclined lower end of the discharge hopper 207 and the inclined lower end of the inclined plate 206 are in the same inclination direction and angle, the inclined lower end of the discharge hopper 207 and the inclined lower end of the inclined plate 206 point to a front end of the frame 100, a rectangular discharge port 209 penetrating inside and outside is disposed on the outer circumferential surface of the fixed cylinder 201, the discharge port 209 is located between the inclined plate 206 and the discharge hopper 207 and connects the inclined lower end of the inclined plate 206 with an inclined upper end of the discharge hopper 207, the vibrators 208 are fixedly mounted on two sides of the discharge hopper 207, the vibrators 208 are beneficial to improving the discharge rate of sand or stones, the phenomenon of blocking or sticking is avoided, and the sand or stones can be discharged out of the fixed cylinder 201 through the inclined plate 206 and the discharge hopper 207.

Referring to fig. 17, 22 and 26, the separation device 200 further includes an air drying mechanism 210 coaxially disposed above the fixed cylinder 201, and a driving mechanism 220 coaxially disposed in the fixed cylinder 201 and located below the sieve tray 203, an upper end of the air drying mechanism 210 is an input end, an input end of the air drying mechanism is connected to an output end of the conveying device 300, a lower end of the air drying mechanism is an output end, an output end of the air drying mechanism is located right above an opening of the sieve tray 203, the air drying mechanism 210 is configured to air-dry a sand-stone mixture from the input end to the output end of the air drying mechanism and uniformly discharge the air-dried sand-stone into the sieve tray 203, and the driving mechanism 220 is configured to drive the tray bottom 204 to rotate around its axis direction or drive the tray bottom 204 to float upwards.

In the working process of the separation device 200, the conveying device 300 conveys a sand-stone mixture to the input end of the air-drying mechanism 210, the sand-stone mixture vertically falls downwards under the action of self gravity, the sand-stone mixture is subjected to air-drying treatment in the process of falling from the input end to the output end, the first drying treatment is carried out, the sand-stone mixture is discharged from the output end of the air-drying mechanism 210 and falls into the sieve tray 203, the heater 202a carries out heating treatment on the screen mesh 203a, the built-in boss and the tray bottom 204, the sieve tray 203 carries out drying treatment on the sand-stone mixture, the second drying treatment is carried out, meanwhile, the driving mechanism 210 transmits power to the tray bottom 204 and drives the sieve tray bottom 204 to rotate around the axis direction of the driving mechanism, the sand-stone mixture centrifugally moves and rolls up and down along the screen mesh 203a, sand is screened out by the screen mesh 203a, and falls into the upper end face of the inclined plate, and the sand passes through the discharge port 209 under the guidance of the inclined plate 206 and enters the discharge hopper 207, and is discharged outwards under the guidance of the discharge hopper 207 until the sand is completely discharged, the stones are retained on the tray bottom 204 of the screen tray 203, finally, the rotation driving of the tray bottom 204 is stopped, the driving mechanism 210 transmits the power to the tray bottom 204 and drives the tray bottom to float upwards along the self axial direction, the tray bottom 204 releases the sealing of the opening formed at the inner circle surface of the built-in boss, the stones slide down to the edge of the tray bottom 204 under the guidance of the conical surface of the upper end surface of the tray bottom 204, the stones discharge the opening formed at the inner circle surface of the built-in boss out of the screen tray 203 and are discharged outwards under the guidance of the inclined plate 206 and the discharge hopper 207, and the beneficial effects are that 1, the principle is simple and reliable, the centrifugal separation is performed on the sand and stones through the heatable screen tray, the treatments of scattering, air drying, and the like can be performed on the agglomerated sand and stones, the wet sand and stones are dried, so that the problem that the sand and the stones are stuck to each other to cause insufficient filtering and separation is effectively avoided; 2. the bottom of sieve tray can upwards float and open, makes the automatic outside discharge of stone that is detained in the sieve tray, has promoted the separation efficiency of gravel and sand greatly.

Referring to fig. 17-21, the air drying mechanism 210 includes a cylindrical stepped thin-wall air drying cylinder 211 coaxial with the fixed cylinder 201 and fixedly connected to an opening of the fixed cylinder, a cylindrical funnel 212 coaxially and fixedly disposed at an opening of an upper end of the air drying cylinder 211, an opening of the funnel 212 is gradually reduced from top to bottom along a vertical direction, a rotating shaft 215 is coaxially and rotatably disposed in the air drying cylinder 211, a fan assembly 216 is coaxially and fixedly sleeved on the rotating shaft 215, the fan assembly 216 is provided with three sets and arranged in an array at equal intervals along an axial direction of the rotating shaft 215, the fan assembly 216 includes a coaxially and fixedly sleeved on the rotating shaft 215, and blades 216b fixedly connected to an outer circumferential surface of the sleeve 216a, the blades 216b are configured as a rectangular thin-wall plate structure, one end of each blade is fixedly connected to an outer circumferential surface of the sleeve 216a, and the, the length direction of blade 216b is arranged along the radial of sleeve 216a, and the contained angle size that constitutes between the width of blade 216b and the horizontal plane is 45, and blade 216b is provided with six and arranges along sleeve 216a place circumferencial direction array, rotates through drive rotation axis 215, makes blade 216b rotate to form the air-dry air current that flows fast from top to bottom in the section of thick bamboo 216b, this air current will carry out air-dry processing to the sand and stone mixture that falls.

Specifically, the air drying cylinder 211 comprises a bottom cylinder 211a, an intermediate cylinder 211b and a top cylinder 211c which are sequentially connected and communicated from bottom to top, the diameters of the bottom cylinder 211a, the intermediate cylinder 211b and the top cylinder 211c are sequentially reduced, the inner diameter of the bottom cylinder 211a is equal to the opening of the sieve tray 203, the bottom cylinder 211a and the top cylinder 211c are coaxially arranged, the lower end opening of the bottom cylinder 211a is the output end of the air drying mechanism 210, the funnel 212 is connected and communicated with the upper end opening of the top cylinder 211c, the funnel 212 is located at the input end of the air drying mechanism 210, the fan assemblies 216 are respectively located at the middle position of the bottom cylinder 211a along the height direction, the middle position of the intermediate cylinder 211b along the height direction, the middle position of the top cylinder 211c along the height direction, the blades 216b located in the bottom cylinder 211a extend to the inner circumferential surface of the bottom cylinder 211a, the blades 216b located in the intermediate cylinder 211b extend to the inner, the blade 216b that is located the top section of thick bamboo 211c extends to the interior disc department of top section of thick bamboo 211c, through the rotation of multiunit fan blade 216, can fully break up the gravel and sand mixture to drying the processing to the gravel and sand mixture that breaks up, air-dry section of thick bamboo 211 sets to the step form, makes along air-dry section of thick bamboo 211 by supreme airflow velocity increase gradually down, promotes air-dried efficiency.

More specifically, a conical fixing block 213 is disposed at a center position of an upper end opening of the top cylinder 211c, an upper end surface of the fixing block 213 is set to be sharp, a lower end surface of the fixing block 213 is set to be horizontal, connecting arms 214 fixedly connecting the fixing block 213 and the top cylinder 211c are disposed between an outer circumferential surface of the fixing block 213 and an inner circumferential surface of the upper end opening of the top cylinder 211c, the connecting arms 214 are four and are arranged in an array along a circumferential direction of the top cylinder 211c, a blanking port is formed between two adjacent connecting arms 214, and a top end of the rotating shaft 215 is rotatably connected and matched with the lower end surface of the.

More specifically, the bottom cylinder 211a is located above the fixed cylinder 201 and an air inlet is formed between the bottom cylinder 211a and the fixed cylinder 201, a Z-shaped supporting leg 217 fixedly connected with the bottom cylinder 211a is arranged at an opening at the lower end of the bottom cylinder 211a and an opening at the upper end of the fixed cylinder 201, one end of the supporting leg 217 is fixedly connected with the opening at the lower end of the bottom cylinder 211a through a bolt, the other end of the supporting leg is fixedly connected with the opening at the upper end of the fixed cylinder 201 through a bolt, the supporting leg 217 comprises two ninety-degree bending positions, a first reinforcing rib 217a is arranged at one of the bending positions, a second reinforcing rib 217b is arranged at the other bending position, and the supporting leg 217 is.

Air-dry mechanism 210 in the course of the work, conveyor 300 is inputed the gravel and sand mixture to funnel 212 in, the gravel and sand mixture gets into through the blanking mouth and air-dries in a section of thick bamboo 211 and fall along air-drying a section of thick bamboo 211 is vertical downwards, in this process, drive rotation axis 215 rotates, rotation axis 215 will drive three fan unit spares 216 and rotate, blade 216b will rotate along round rotation axis 215, blade 216b breaks up the gravel and sand mixture of caking on the one hand, on the other hand blade 216b will make and air-dry the interior supreme air current from bottom to top of a section of thick bamboo 211, this air current will air-dry the processing to the gravel and sand mixture of breaing up, the gravel and sand mixture after air-drying will be by end section of thick bamboo 211a internal diameter.

Referring to fig. 22 to 26, the driving mechanism 220 includes a sealing cylinder 221 with both closed upper and lower ends, a main motor 222 and a cylinder 223, the sealing cylinder 211 is coaxially and fixedly connected with the bottom of the fixed cylinder 201, one end of the sealing cylinder 211 is located below the inclined plate 206, the other end of the sealing cylinder 211 is located above the inclined plate 206, the main motor 222 is fixedly arranged in the sealing cylinder 211, the output shaft of the main motor 222 is vertically and upwardly arranged coaxially with the sieve tray 203, the cylinder 223 is arranged between the output shaft of the main motor 222 and the tray bottom 204, one end of the cylinder 223 is coaxially and fixedly connected with the output shaft of the main motor 222, the other end of the cylinder 223 is coaxially and fixedly connected with the tray bottom 204, the tray bottom 204 can be driven to rotate by the rotation of the main motor 222, and the tray bottom 204 can.

Specifically, the cylinder 223 includes a cylindrical cylinder 223a and a piston rod 224, a circular bottom plate 223b which is in sealing connection and matching with the cylinder 223a is coaxially and fixedly arranged at a lower opening of the cylinder 223a, a circular air-permeable top plate 223c is coaxially and fixedly arranged at an upper opening of the cylinder 223a, the piston rod 224 includes a piston 224a and an expansion rod 224b which are coaxially and fixedly connected, the piston 224a is matched with the cylinder 223a and forms sealing sliding guide and matching along the vertical direction, relative rotation between the piston 224a and the cylinder 223a is constrained, that is, relative rotation does not occur between the piston 224a and the cylinder 223a, the piston 224a, the cylinder 223a and the bottom plate 223b form a volume-variable air chamber, the lower end of the expansion rod 224 is fixedly connected with the piston 224a, the upper end of the expansion rod 224 is fixedly connected with the lower end face of the disc bottom 204 by, the telescoping rod 224b is slid upward, driving the tray floor 204 to float upward.

More specifically, in order to supply air to the air chamber, an annular butt joint groove 225 is coaxially formed in the outer circular surface of the cylinder body 223a close to the lower end of the cylinder body 223a, an air supply hole 226 communicated with the air chamber is formed in the groove bottom of the butt joint groove 225, the air supply hole 226 is provided with a plurality of air supply holes and is arranged in an array mode in the circumferential direction of the cylinder body 223a, an annular butt joint pipe 227 communicated with the butt joint groove 225 is sleeved at the annular groove opening of the butt joint groove 225, the butt joint pipe 227 and the butt joint groove 225 form sealed rotating connection matching, the butt joint pipe 227 is fixed in the sealing cylinder 221 and is communicated with an air pump through the air supply pipe 228.

More specifically, in order to transmit power to the airing mechanism 210 and drive the rotating shaft 215 to rotate, a transmission shaft 229 connecting the disk bottom 204 and the lower end of the rotating shaft 215 is disposed between the disk bottom 204 and the lower end of the rotating shaft 215, the transmission shaft 229 is a hollow shaft and is internally provided with an internal spline, the lower end of the transmission shaft 229 is an input end and is coaxially and fixedly connected with the upper end surface of the disk bottom 204, the upper end of the transmission shaft 229 is an output end and is coaxially sleeved on the lower end of the rotating shaft 215, the outer circumferential surface of the lower end of the rotating shaft 215 is provided with an external spline, the external spline is combined with the internal spline and can slide up and down along the vertical direction, the significance of the scheme is that the transmission shaft 229 can transmit the power of the main motor 222 to the rotating shaft 215 and drive the rotating shaft 215 to rotate, and when the disk bottom 224 floats, without affecting the upward float of the tray floor 224.

In the working process of the driving mechanism 220, the main motor 222 is started, the main motor 222 drives the cylinder 223 to rotate around the axial direction of the main motor, the cylinder 223 transmits power to the tray bottom 204 and drives the tray bottom 204 to rotate, the transmission shaft 229 transmits the power on the tray bottom 204 to the rotating shaft 215 and drives the blades 216b to rotate around the rotating shaft 215, the drying mechanism 210 is driven, meanwhile, the sieve tray 203 synchronously rotates and centrifugally separates and screens sand and stones until the sand is completely screened out and discharged outside, the main motor 222 is turned off to stop the rotation of the tray bottom 204, at this time, the cylinder 223 is supplied with air, the piston 224a slides upwards, the telescopic rod 224b moves upwards and drives the tray bottom 204 to float upwards, and the tray bottom 204 releases the sealing of an opening formed at the inner circular surface of the built-in boss.

Referring to fig. 28 to 30, the conveying device 300 includes a mounting frame 301 fixedly disposed on an upper end surface of the rack 100, a first extension frame 301a horizontally extending along a front end of the traveling direction of the rack 100 is fixedly disposed on a top of the mounting frame 301, a second extension frame 301b horizontally extending along a rear end of the traveling direction of the rack 100 is fixedly disposed on a bottom of the mounting frame 301, the first extension frame 301a has the same height as the hopper 212 and is inserted into the hopper 212 through a rectangular opening formed on an outer circumferential surface of the hopper 202, a driving roller 302 is rotatably disposed at a connection portion of the second extension frame 301b and the mounting frame 301, a first driven roller 303 is rotatably disposed at an extension end portion of the second extension frame 301b, a second driven roller 304 is rotatably disposed at a connection portion of the first extension frame 301a, a third driven roller 305 is rotatably disposed at an extension end portion of the first extension frame 301a, axial directions of the driving roller 302, the first driven roller 303, the second driven roller 304 and the third driven roller 305, the driving roller 302, the driven roller one 303, the driven roller two 304 and the driven roller three 305 are wound on a conveyer belt 306 forming a closed circulation loop, the conveyer belt 306 forms a parallelogram inclining towards the hopper 212, a rectangular hopper 307 with an opening arranged away from the conveyer belt 306 is fixedly arranged on the conveyer belt 307, and the hopper 307 is provided with a plurality of hoppers and is arranged in an array with equal intervals along the running direction of the conveyer belt 307.

Specifically, the conveying device 300 further includes a conveying motor 308 fixedly disposed on the rack 100, an axial direction of an output shaft of the conveying motor 308 is parallel to an axial direction of the driving roller 302, a belt transmission assembly 309 for connecting the output shaft of the conveying motor 308 and a driving end of the driving roller 302 is disposed between the output shaft of the conveying motor 308 and the driving end of the driving roller 302, the belt transmission assembly includes a driving pulley coaxially and fixedly sleeved on the output shaft of the conveying motor 308, a driven pulley coaxially and fixedly sleeved on the driving end of the driving roller 302, and a belt wound between the driving pulley and the driven pulley, the conveying belt 307 is driven to operate by the conveying motor 308, the hopper 307 moves upward and pours a sand-stone mixture inside the hopper 307 into the hopper 212.

More specifically, the bottom of the hopper 307 is fixedly provided with a connecting belt 307a, the connecting belt 307a is arranged along the width direction of the conveying belt 306, the connecting belts 307a are arranged in parallel and are away from each other, the connecting belt 307a is fixedly connected with the conveying belt 306, the bottom of the hopper 307 is fixedly connected with the connecting belt 307 into a whole and is made of a high-elasticity rubber material, and the method is used for flexibly connecting the hopper 307 with the conveying belt 306 through micro-deformation.

In the working process of the conveying device 300, the sand-stone mixture is scooped up and dumped into the hopper 307 by the dumper, the conveying motor 308 drives the driving roller 302 to rotate, the conveying belt 306 continuously runs upwards, when the hopper 307 passes over the driving roller III 305 at the hopper 212, the opening of the hopper 307 turns downwards and dumps the sand-stone mixture into the hopper 212, the sand-stone mixture is supplied to the separating device 200, the conveying belt 306 continuously and slowly runs, the hopper 307 intermittently adds the sand-stone mixture into the hopper 212, and the mixture finishes the separation treatment on the sand-stone added last time in the intermittent time of feeding.

Referring to fig. 2 and 5, the lower end surface of the frame 100 near the front end thereof is provided with a front wheel 101, the lower end surface of the frame 100 near the rear end thereof is provided with a rear wheel 102, the side surface near the front end thereof is fixedly provided with a towing handle 103, the rear wheels 102 are symmetrically arranged in the left-right direction along the length direction parallel to the frame 100, two rear wheels 102 and one front wheel 101 form a three-point structure, the front wheel 101 comprises a first retainer 101a rotatably connected and matched with the frame 100, a driving roller 101b rotatably arranged on the first retainer 101a, a hinge shaft formed at the rotary connection of the first retainer 101a and the frame 100 is axially and vertically arranged, a hub motor capable of driving the driving roller 101b is arranged inside the driving roller 101b and is powered and driven by a storage battery, the rear wheel 102 comprises a second retainer 102a rotatably connected and matched with the frame 100 and a driven roller 102b rotatably arranged on the second retainer 102, a hinge shaft formed at the rotary connection part of the second retainer 102a and the rack 100 is axially and vertically arranged, the driving roller 101b is driven to rotate through the in-wheel motor, the driven roller 102b is driven to rotate, the forward and backward movement of the rack 100 is realized, and meanwhile, the forward direction of the rack 100 is controlled by pulling the traction handle 103 by an operator.

Referring to fig. 6, as a more preferable scheme of the present invention, in order to collect stones discharged by the separation device 200, a guide plate 104 arranged to be inclined downward is fixed at the front end of the frame 100, rectangular plate-shaped guard rails 105 arranged vertically are fixed at both sides of the guide plate 104, a clamping groove 106 is formed near one side of each guard rail 105, a lower end of the clamping groove 106 extends to the guide plate 104, and an upper end of the clamping groove 106 penetrates through the guard plate 105, a rectangular basket 107 with an open end is arranged between the two guard rails 105 and is in clamping fit with the clamping groove 106, an end of the basket 107 is inserted into the clamping groove 106, an opening of the basket 107 is arranged upward along an inclined direction of the guide plate 104, a lower end of the discharge hopper 207 is aligned with the inclined upper end of the guide plate 104, through the arrangement of the basket 107, discharged sand can freely pass through the basket 107, discharged stones will enter the basket 107 to be collected, the discharged sand is prevented from being mixed with the stones again.

Referring to fig. 2, as a more complete solution of the present invention, in order to facilitate integrated control of the whole machine, a control panel 110 is fixedly installed on a side surface of the rack 100, the control panel 110 is located at a middle position of the rack 100 along a length direction thereof, the control panel 110 establishes signal connection with the main motor 222, the conveying motor 308 and the hub motor through a controller, and can control start, stop and rotation speed of the main motor 222, the conveying motor 308 or the hub motor on the control panel 110.

Referring to fig. 2, as a more optimized scheme of the present invention, a push-pull drawer 120 is disposed between an upper end surface and a lower end surface of the rack 100, an inference direction of the drawer 120 is a width direction of the rack 100 and can be pulled out and opened at one side of the rack 100, the drawer 120 is used for storing personal articles of an operator, and the drawer 120 is located between the control panel 110 and the traction handles 103.

Claims

1. The utility model provides a gravel and sand centrifugation screening equipment for building engineering which characterized in that: the sand and stone drying and separating device comprises a rectangular hollow frame capable of traveling, a separating device and a conveying device, wherein one end of the frame in the length direction is the front end of the traveling direction, the other end of the frame in the length direction is the rear end of the traveling direction, the separating device is fixedly arranged on the upper end face of the frame and is arranged close to the front end of the frame, the conveying device is fixedly arranged on the upper end face of the frame and is arranged close to the rear end of the frame, the conveying device is used for supplying sand and stone to the separating device, the separating device is used for drying and centrifugally separating the sand and stone, and firstly, the sand is discharged outwards, and then, the stones are discharged outwards;

2. The sand centrifugal screening device for the construction engineering according to claim 1, wherein: but solid fixed ring's up end inlays and is equipped with rolling ball, the ball is provided with a plurality ofly and arrange along solid fixed ring place circumferencial direction array, external boss is located solid fixed ring's top and the ball is with the lower terminal surface of external boss and solid fixed ring's up end roll connection cooperation, external boss is laminated mutually with the interior disc of solid fixed cylinder, coaxial fixed annular electric heater that is provided with on solid fixed ring's the interior disc, the heater contacts with the screen cloth and can be with heat conduction to screen cloth fast, built-in boss and the bottom of a plate, the screen cloth, built-in boss and the bottom of a plate are the material that the heat conductivility is good.

3. The sand centrifugal screening device for the construction engineering according to claim 1 or 2, characterized in that: the upper end face of the built-in boss is provided with a triangular-structure meshing groove which penetrates through the inner circular face of the built-in boss, the meshing groove is provided with a plurality of meshing blocks which are arranged in an array mode along the circumferential direction where the built-in boss is located, the diameter of the disc bottom is equal to that of the inner circular face of the built-in boss, the outer circular face of the disc bottom is fixedly provided with a triangular-structure meshing block which protrudes outwards in the radial direction, the meshing blocks are matched with the meshing groove, the meshing blocks are arranged in an array mode along the circumferential direction where the disc bottom is located and correspond to the meshing grooves in a one-to-one mode, the meshing blocks are combined with the meshing groove in the initial state, the disc bottom and the screen cloth can rotate synchronously, and.

4. The sand centrifugal screening device for the construction engineering according to claim 3, wherein: the fixed cylinder internal fixation is provided with the oblique board of arranging of slope, the contained angle that constitutes between oblique board and the horizontal plane is between 45 to 60, it cuts apart into two upper and lower independent cavities with the fixed cylinder to put the board to one side, it is located the below of sieve tray to put the board to one side, the fixed row who is provided with the slope and arranges downwards on the outer disc of fixed cylinder fights, arrange the bin hopper and put the slope lower extreme of board to one side to align and both inclination directions, the angle is unanimous, arrange the front end of the directional frame of slope lower extreme of fighting and putting the board to one side, set up the bin outlet of the inside and outside rectangle that runs through on the outer disc of fixed cylinder, the bin outlet is located between oblique board and the bin hopper and is connected the switch-on with the slope upper end of arranging the slope lower extreme of oblique board and arranging the bin hopper.

5. The sand centrifugal screening device for the construction engineering according to claim 1, wherein: separator still including the coaxial air-dry mechanism that sets up in the solid fixed cylinder top, the coaxial actuating mechanism that sets up in the solid fixed cylinder and be located the sieve tray below, the upper end of air-dry mechanism is input and conveyor's output link, the lower extreme is the output and the output is located the sieve tray open-ended directly over, air-dry mechanism is used for falling by its input to the gravel and sand mixture between the output air-dry processing and will air-dry the even discharge of gravel and sand to the sieve tray of back, actuating mechanism is used for the drive plate to rotate around self axis direction at the bottom of the drive plate or the drive plate is at the bottom of upwards floating along self axis direction.

6. The sand centrifugal screening device for the construction engineering according to claim 5, wherein: the air drying mechanism comprises a cylindrical step-shaped thin-wall air drying cylinder which is coaxial with the fixed cylinder and fixedly connected with the opening of the fixed cylinder, openings at the upper end and the lower end of the air drying cylinder are coaxially and fixedly provided with a cylindrical funnel, the opening of the funnel is gradually reduced from top to bottom along the vertical direction, a rotating shaft is coaxially and rotatably arranged in the air drying cylinder, a fan assembly is coaxially and fixedly sleeved on the rotating shaft, the fan assembly is provided with three groups and is arranged in an equidistant array along the axial direction of the rotating shaft, the fan assembly comprises a sleeve which is coaxially and fixedly sleeved on the rotating shaft and blades which are fixedly connected with the outer circular surface of the sleeve, the blades are arranged into a rectangular thin-wall plate body structure, one end of each blade is fixedly connected with the outer circular surface of the sleeve, the other end of each blade extends to the inner circular surface of the, the six blades are arranged in an array along the circumferential direction of the sleeve;

7. The sand centrifugal screening device for the construction engineering according to claim 5, wherein: the driving mechanism comprises a sealing cylinder, a main motor and an air cylinder, wherein the upper end and the lower end of the sealing cylinder are sealed, the sealing cylinder is coaxially and fixedly connected with the bottom of the fixed cylinder, one end of the sealing cylinder is positioned below the inclined plate, the other end of the sealing cylinder is positioned above the inclined plate, the main motor is fixedly arranged in the sealing cylinder, an output shaft of the main motor is vertically and upwards coaxially arranged with the sieve tray, the air cylinder is arranged between an output shaft of the main motor and the tray bottom, one end of the air cylinder is coaxially and fixedly connected with the output shaft of the main motor, and the other end of the;

the air cylinder comprises a cylindrical cylinder body and a piston rod, a circular bottom plate which is in sealing connection and matching with the opening at the lower end of the cylinder body is coaxially and fixedly arranged at the opening at the upper end of the cylinder body, and a circular ventilating top plate is coaxially and fixedly arranged at the opening at the upper end of the cylinder body;

the cylinder body is close to and has offered annular butt joint groove on the excircle face of its lower extreme coaxially, and the tank bottom in butt joint groove offers the air supply hole of being connected the switch-on with the air chamber, and the air supply hole is provided with a plurality ofly and arranges along cylinder body place circumferencial direction array, and the annular notch department in butt joint groove cup joints the annular butt joint pipe rather than being connected the switch-on, and the butt joint pipe constitutes sealed rotation connection cooperation with the butt joint groove, and the butt joint pipe is fixed in the sealed cylinder and is connected the switch-on by air supply pipe.

8. The sand centrifugal screening device for the construction engineering according to claim 7, wherein: the drive mechanism still including setting up the transmission shaft between the lower extreme of the end of a plate and rotation axis, the transmission shaft is the quill shaft and its inside internal spline that is provided with, the lower extreme of transmission shaft is the input and this end and the coaxial fixed connection of the up end at the end of a plate, the upper end of transmission shaft is the output and this end is coaxial cup joints on the lower extreme of rotation axis, be provided with the external spline on the outer disc of lower extreme of rotation axis, the external spline combines together and both can slide from top to bottom along vertical direction with the internal spline.

9. The sand centrifugal screening device for the construction engineering according to claim 1, wherein: the conveying device comprises a mounting frame fixedly arranged on the upper end surface of the rack, a first extending frame horizontally extending along the front end of the traveling direction of the rack is fixedly arranged at the top of the mounting frame, a second extending frame horizontally extending along the rear end of the traveling direction of the rack is fixedly arranged at the bottom of the mounting frame, the first extending frame is equal in height to the funnel and is inserted into the funnel through a rectangular opening formed in the outer circumferential surface of the funnel, a driving roller is rotatably arranged at the joint of the second extending frame and the mounting frame, a driven roller is rotatably arranged at the end part of the extending end of the second extending frame, a driven roller is rotatably arranged at the joint of the first extending frame and the mounting frame, a third driven roller is rotatably arranged at the end part of the extending end of the first extending frame, the axial directions of the driving roller, the first driven roller, the second driven roller and the third driven roller are all parallel to the width direction of the rack, and the driving roller, the first, the conveying belt forms a parallelogram inclined towards the hopper, a rectangular charging hopper with an opening arranged away from the conveying belt is fixedly arranged on the conveying belt, and a plurality of charging hoppers are arranged in an array at equal intervals along the running direction of the conveying belt;

10. The sand centrifugal screening apparatus for construction engineering according to any one of claims 4 to 9, wherein: the front wheel comprises a first retainer rotationally connected and matched with the rack and a driving roller rotationally arranged on the first retainer, a hinged shaft formed at the rotational joint of the first retainer and the rack is axially and vertically arranged, a hub motor capable of driving the first retainer is arranged in the driving roller and is powered and driven by a storage battery, the rear wheel comprises a second retainer rotationally connected and matched with the rack and a driven roller rotationally arranged on the second retainer, and the hinged shaft formed at the rotational joint of the second retainer and the rack is axially and vertically arranged;