CN110252644B

CN110252644B - Classification sand screening machine

Info

Publication number: CN110252644B
Application number: CN201910712026.1A
Authority: CN
Inventors: 王琼; 马玉秋; 陈刚; 董如国
Original assignee: Harbin University
Current assignee: Harbin University
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-01-07
Anticipated expiration: 2039-08-02
Also published as: CN110252644A

Abstract

The invention relates to a sand screening machine, in particular to a classification sand screening machine. The sand and stone separating and conveying device comprises a base body, a first screen, a primary collecting hopper, a vibrating part, a slow falling mechanism, a braking part, a transmission part, a sub-hopper, a moving increasing device and a rack, wherein the primary collecting hopper is used for buffering, shunting and vibrating added sand and stone to convey a single layer of sand and stone to a first screen body, so that noise is reduced, the service life of the first screen body is prolonged, and screening efficiency is improved; by means of alternate lifting of the two baffles, single-layer sand and stones are blocked in a segmented mode, screening time is prolonged, the length of the first screen body is reduced, and screening efficiency can also be improved; the arc frame and the second screen which obliquely and reciprocally swings can increase the stroke of sand screening movement, reduce the length of the second screen and simultaneously increase the screening efficiency of coarse sand and fine sand; the invention can complete the screening of stones, coarse sand and fine sand through a shorter screening net and a two-layer screening structure, has lower height, is easy to fill, has small occupied area of equipment and has high screening efficiency.

Description

Classification sand screening machine

Technical Field

The invention relates to a sand screening machine, in particular to a classification sand screening machine.

Background

For example, a vibration type classification screening sand machine with publication number CN207655473U, includes a base, a feed inlet, a screening sand box, a screening sand net, a discharge table, a discharge outlet, an aggregate downward-conveying joint, a fixing frame, a shaking table, a damping spring, a vibration motor, etc. The sand screening machine comprises a classification sand screening machine, a sand screening box, a sand screening table, a sand screening net, a base, a sand screening machine and a sand discharging table, wherein a feed inlet, three sand screening boxes and three discharging tables are arranged on the uppermost higher side of the classification sand screening machine, a discharge outlet is arranged at the edge of the discharging table, the pore diameter of the sand screening net of the sand screening box from top to bottom is gradually increased, and the sand screening machine and the discharging tables have a 20-degree inclination angle compared with the base; however, the classification sand screening machine has three layers, the sand screening net needs to be long to fully screen sand, sand materials are not easily added due to too high height, and the occupied area is too large.

Disclosure of Invention

The invention aims to provide a classification sand screening machine which can reduce the floor area of equipment and increase the sand screening efficiency.

The purpose of the invention is realized by the following technical scheme:

a classification sand screening machine comprises a base body, a first screen, a primary collecting hopper, a vibration part, a slow falling mechanism, a braking part, a transmission part, a sub-hopper, an increasing and moving device and a rack, connect first screen cloth on the base member, the right-hand member rigid coupling of first screen cloth is just received and is fought, vibrate the middle part of portion rotation connection at first screen cloth upside, it is provided with two to slowly fall the mechanism, two slowly fall the mechanism sliding connection respectively in the left and right sides at first screen cloth middle part, two rack of the front end difference fixed connection of slowly falling the mechanism, two rack mirror symmetry sets up, braking part rigid coupling is on the base member, the base member meshes the transmission with the left end face that is located the rack on right side, transmission part rigid coupling is on the base member, braking part passes through synchronous belt drive with transmission part and is connected, transmission part meshes the transmission with the right-hand member face that is located left rack, sub-bucket and base member rigid coupling, sub-bucket is located first screen cloth under, increase and move the ware and.

The base member includes base member body, spacing bolt body, compression spring I, guide rail seat, opening, motor I and band pulley I, spacing bolt body of rigid coupling respectively on the four corners of base member body upper end, four spacing bolt bodies go up the cover respectively and have a compression spring I, and the upper end of four spacing bolt bodies is stopper I of rigid coupling respectively, and two guide rail seats of front and back both ends difference rigid coupling at base member body middle part, I rigid couplings of motor are on the base member body, and I rigid couplings of band pulley are on the output shaft of motor I.

The first screen comprises a blocking frame, a first screen body and a fixing and buffering seat, the blocking frame is fixedly connected with the first screen body, and four corners of the lower end of the blocking frame are fixedly connected with the fixing and buffering seat respectively; four solid slow seats are respectively connected to the four limiting bolt bodies in a sliding mode, and the upper ends of the four compression springs I are respectively in contact with the lower ends of the four solid slow seats.

The primary collecting hopper comprises an upper box, a flow distribution triangular body, a lower box and an inclined plate, wherein the middle part of the inner end of the upper box is fixedly connected with the flow distribution triangular body, the lower box is fixedly connected to the lower end of the upper box, and the inclined plate is fixedly connected in the lower box; the lower box is fixedly connected to the right end of the blocking frame.

The vibration part comprises a main shaft, a vibration exciting block and a belt wheel II, the left end and the right end of the main shaft are fixedly connected with the vibration exciting block respectively, and the belt wheel II is fixedly connected to the main shaft; the front side and the rear side of the main shaft are respectively connected to the front end and the rear end of the blocking frame in a rotating mode, and the belt wheel II is connected with the belt wheel I through a synchronous belt in a driving mode.

The slow falling mechanism comprises a baffle, an arc part, two stabilizer bars, a compression spring II, a ribbon board, an extension block and a guide block, wherein the arc part is arranged at the lower end of the baffle, the two stabilizer bars are fixedly connected at the upper end of the baffle, the compression spring II is sleeved at the upper ends of the two stabilizer bars respectively, the two stabilizer bars are connected to the ribbon board in a sliding manner, the upper ends of the two compression springs II are contacted with the lower end face of the ribbon board, the upper ends of the two stabilizer bars are fixedly connected with a limit block II respectively, the extension block is fixedly connected at the left end of the ribbon board, and the front end and the rear end of the ribbon; the two extending blocks are fixedly connected with a rack respectively, the two guide blocks positioned on the right side are connected in the two guide rail seats positioned on the right side in a sliding manner, and the two guide blocks positioned on the left side are connected in the two guide rail seats positioned on the left side in a sliding manner.

The braking part comprises a motor II, a gear I and a belt wheel III, and an output shaft of the motor II is fixedly connected with the gear I and the belt wheel III; the motor II is fixedly connected to the front end of the base body, and the gear I is in meshed transmission with the left end face of the rack on the right side.

The transmission part comprises a belt seat bearing, a shaft I, a gear II and a belt wheel IV, wherein the belt seat bearing is provided with a rotating connecting shaft I, and the front end and the rear end of the shaft I are fixedly connected with the gear II and the belt wheel IV respectively; the gear II is in meshing transmission with the right end face of the rack positioned on the left side, and the belt pulley IV is in transmission connection with the belt pulley III through a synchronous belt.

The sub-buckets comprise arc frames, fine sand collecting buckets and coarse sand outlets, the lower ends of the arc frames are fixedly connected with the fine sand collecting buckets, and the front side and the rear side of the left ends of the arc frames are respectively provided with the coarse sand outlets; the arc frame is fixedly connected with the inner end of the base body and is positioned right below the first screen body.

The motion increaser comprises a second screen, a shaft II and a motor III, wherein the middle parts of the left end and the right end of the second screen are fixedly connected with the shaft II respectively, and the shaft II positioned at the right end is fixedly connected with an output shaft of the motor III; the second screen mesh is connected with the inner end face of the arc frame in a sliding mode, the two shafts II are respectively connected with the left end and the right end of the arc frame in a rotating mode, and the motor III is fixedly connected with the right end of the base body.

The classifying sand screening machine has the beneficial effects that:

the added sand and stones are buffered and distributed by the primary collecting hopper, and the single-layer sand and stones are conveyed to the first screen body in a vibration mode, so that noise is reduced, the service life of the first screen body is prolonged, and screening efficiency is improved; by means of alternate lifting of the two baffles, single-layer sand and stones are blocked in a segmented mode, screening time is prolonged, the length of the first screen body is reduced, and screening efficiency can also be improved; the arc frame and the second screen which obliquely and reciprocally swings can increase the stroke of sand screening movement, reduce the length of the second screen and simultaneously increase the screening efficiency of coarse sand and fine sand; the invention can complete the screening of stones, coarse sand and fine sand through a shorter screening net and a two-layer screening structure, has lower height, is easy to fill, has small occupied area of equipment and has high screening efficiency.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the overall structure of a classification sand screening machine of the present invention;

FIG. 2 is a second overall structural schematic of the present invention;

FIG. 3 is a schematic view of the base structure of the present invention;

FIG. 4 is a schematic view of a first screen configuration of the present invention;

FIG. 5 is a schematic view of the primary hopper of the present invention;

FIG. 6 is a schematic view of an oscillating portion according to the present invention;

FIG. 7 is a schematic structural view of a slow-falling mechanism of the present invention;

FIG. 8 is a schematic view of the brake of the present invention;

FIG. 9 is a schematic view of the transmission of the present invention;

FIG. 10 is a schematic view of the bucket configuration of the present invention;

fig. 11 is a schematic view of the structure of the increaser of the present invention.

In the figure: a substrate 1; a base body 101; a limit bolt body 102; a compression spring I103; a rail seat 104; an opening 105; a motor I106; a pulley I107; a first screen 2; a baffle frame 201; a first screen body 202; a fixing and buffering seat 203; a primary collecting hopper 3; an upper box 301; a shunt triangle 302; a lower box 303; a swash plate 304; an oscillating section 4; a main shaft 401; a vibration exciting block 402; a pulley II 403; a slow-falling mechanism 5; a baffle 501; an arc portion 502; a stabilizer bar 503; a compression spring II 504; a bar carrier plate 505; an extension block 506; a guide block 507; a brake section 6; a motor II 601; a gear I602; a pulley III 603; a transmission section 7; a pedestal bearing 701; a shaft I702; a gear II 703; pulley IV 704; a branch hopper 8; an arc frame 801; a fine sand hopper 802; a coarse sand outlet 803; a transfer increasing device 9; a second screen 901; a shaft II 902; a motor III 903; a rack 10.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1-11, a classification sand screening machine comprises a base body 1, a first screen 2, a primary receiving hopper 3, an oscillating portion 4, two slow-falling mechanisms 5, a braking portion 6, a transmission portion 7, a sub-hopper 8, a movement increasing device 9 and racks 10, wherein the base body 1 is connected with the first screen 2, the right end of the first screen 2 is fixedly connected with the primary receiving hopper 3, the oscillating portion 4 is rotatably connected with the middle of the upper side of the first screen 2, the two slow-falling mechanisms 5 are arranged, the two slow-falling mechanisms 5 are respectively and slidably connected with the left side and the right side of the middle of the first screen 2, the front ends of the two slow-falling mechanisms 5 are respectively and fixedly connected with one rack 10, the two racks 10 are arranged in mirror symmetry, the braking portion 6 is fixedly connected with the base body 1, the base body 1 is in meshing transmission with the left end face of the rack 10 positioned on the right side, the transmission portion 7 is fixedly connected with the transmission portion 6 in transmission through synchronous belt transmission, the transmission, the sub-hopper 8 is fixedly connected with the base body 1, the sub-hopper 8 is positioned right below the first screen 2, and the movement increasing device 9 is rotatably connected with the sub-hopper 8. The added sand and stones are buffered and distributed by the primary collecting hopper 3, and are combined with vibration to convey a single layer of sand and stones to the first screen cloth body 202, so that the noise is reduced, the service life of the first screen cloth body 202 is prolonged, and the screening efficiency is increased; by alternately lifting and lowering the two baffles 501, the single-layer sand and stone are blocked in a segmented manner, so that the screening time is increased, the length of the first screen body 202 is reduced, and the screening efficiency can also be increased; the arc frame 801 and the second screen 901 which obliquely and reciprocally swings can increase the stroke of sand screening movement, reduce the length of the second screen 901 and increase the screening efficiency of coarse sand and fine sand; the invention can complete the screening of stones, coarse sand and fine sand through a shorter screening net and a two-layer screening structure, has lower height, is easy to fill, has small occupied area of equipment and has high screening efficiency.

The second embodiment is as follows:

as shown in fig. 1-11, the base body 1 includes a base body 101, limiting bolt bodies 102, compression springs i 103, guide rail seats 104, an opening 105, a motor i 106 and a pulley i 107, the four corners of the upper end of the base body 101 are respectively and fixedly connected with one limiting bolt body 102, the four limiting bolt bodies 102 are respectively sleeved with one compression spring i 103, the upper ends of the four limiting bolt bodies 102 are respectively and fixedly connected with one limiting block i, the front end and the rear end of the middle part of the base body 101 are respectively and fixedly connected with two guide rail seats 104, the motor i 106 is fixedly connected to the base body 101, and the pulley i 107 is fixedly connected to an output shaft of the motor i 106. Starting motor I106, the output shaft of motor I106 drives band pulley I107 and rotates, and band pulley I107 drives band pulley II 403 to rotate through the drive belt.

The third concrete implementation mode:

as shown in fig. 1-11, the first screen 2 includes a blocking frame 201, a first screen body 202 and a fixing and buffering seat 203, the blocking frame 201 is fixedly connected to the first screen body 202, and four corners of the lower end of the blocking frame 201 are fixedly connected to the fixing and buffering seat 203 respectively; the four fixing and buffering seats 203 are respectively connected to the four limiting bolt bodies 102 in a sliding mode, and the upper ends of the four compression springs I103 are respectively in contact with the lower ends of the four fixing and buffering seats 203. The vibration causes the sand and stone slowly flowing toward the first screen body 202 to move to the left on the first screen body 202 in a layer, increasing the screening efficiency, the first screen body 202 is used for separating the sand and stone, the stones continue to roll to the left, and the sand falls through the first screen body 202 onto the second screen 901.

The fourth concrete implementation mode:

as shown in fig. 1 to 11, the primary bucket 3 includes an upper box 301, a flow dividing triangle 302, a lower box 303 and an inclined plate 304, the flow dividing triangle 302 is fixedly connected to the middle of the inner end of the upper box 301, the lower box 303 is fixedly connected to the lower end of the upper box 301, and the inclined plate 304 is fixedly connected to the lower box 303; the lower box 303 is fixedly connected to the right end of the baffle frame 201. The sand and stone can be shoveled or dumped into the upper box 301, the sand and stone is firstly contacted with the flow dividing triangular body 302, the contacted sand and stone is subjected to a left or right reaction force given by the flow dividing triangular body 302, the reaction force buffers the vertical downward impact force of the sand and stone and plays a certain flow limiting role, namely the sand and stone added into the upper box 301 too fast is increased, the buffered sand and stone continuously falls to the inclined plate 304, the inclined plate 304 completely relieves the impact force of the falling sand and stone, the service life of the first screen body 202 is prevented from being reduced by the impact force of the falling sand and stone, the noise generated when the sand and stone falls can be reduced by the first flow dividing buffering and the second complete buffering, and the completely buffered sand and stone continuously and slowly flows to the first screen body 202 through the inclined surface of the inclined plate 304.

The fifth concrete implementation mode:

as shown in fig. 1 to 11, the oscillating portion 4 includes a main shaft 401, an excitation block 402 and a pulley ii 403, the left and right ends of the main shaft 401 are respectively and fixedly connected to the excitation block 402, and the pulley ii 403 is fixedly connected to the main shaft 401; the front side and the rear side of the main shaft 401 are respectively connected to the front end and the rear end of the baffle frame 201 in a rotating mode, and the belt pulley II 403 is connected with the belt pulley I107 through a synchronous belt. The belt wheel II 403 drives the main shaft 401 to rotate, the main shaft 401 drives the two excitation blocks 402 to rotate, and the rotating excitation blocks 402 drive the first screen 2 and the primary collecting hopper 3 to vibrate up and down.

The sixth specific implementation mode:

as shown in fig. 1-11, the slow-falling mechanism 5 includes a baffle 501, an arc portion 502, stabilizers 503, two compression springs ii 504, a bar-carrying plate 505, an extension block 506 and a guide block 507, the arc portion 502 is disposed at the lower end of the baffle 501, the two stabilizers 503 are fixedly connected to the upper end of the baffle 501, the two compression springs ii 504 are respectively sleeved at the upper ends of the two stabilizers 503, the two stabilizers 503 are both slidably connected to the bar-carrying plate 505, the upper ends of the two compression springs ii 504 are both in surface contact with the lower end of the bar-carrying plate 505, the upper ends of the two stabilizers 503 are respectively fixedly connected to a stopper ii, the extension block 506 is fixedly connected to the left end of the bar-carrying plate 505, and the front and rear ends of the bar-carrying plate; the two extending blocks 506 are respectively and fixedly connected with a rack 10, the two guide blocks 507 on the right side are slidably connected in the two guide rail seats 104 on the right side, and the two guide blocks 507 on the left side are slidably connected in the two guide rail seats 104 on the left side. In the initial state, the baffle 501 located on the right side is in contact with the first screen body 202, and when the first screen body 202 vibrates, the baffle 501 also generates adaptive vibration by the compression spring ii 504, the purpose of the screen is to block a layer of sand and stones on the first screen body 202 from falling and prevent the first wave from falling and fully screen the first wave, then the baffle plate 501 on the right side moves upwards to release the stones and the sand and stones falling subsequently, the first screen body 202 on the left side descends to block the released stones and the sand and stones falling subsequently and fully screen the first screen body 202 on the left side, then the first screen body 202 on the left side ascends to release the stones and fall out from the left side of the first screen body 202, the purpose of such reciprocating is to increase the screening time of the single-layer gravel and sand on the first screen body 202, reduce the total length of the equipment, reduce the floor area of the equipment, increase the screening efficiency, and reduce the degree of abrasion of the first screen body 202 caused by the gravel and sand rolling off continuously or directly.

The seventh embodiment:

as shown in fig. 1-11, the braking portion 6 includes a motor ii 601, a gear i 602, and a pulley iii 603, and the gear i 602 and the pulley iii 603 are fixedly connected to an output shaft of the motor ii 601; the motor II 601 is fixedly connected to the front end of the base body 101, and the gear I602 is in meshing transmission with the left end face of the rack 10 on the right side. The motor II 601 is started to rotate in a positive and negative circulation mode according to a fixed stroke, an output shaft of the motor II 601 drives the gear I602 and the belt wheel III 603 to rotate, and the belt wheel III 603 drives the belt wheel IV 704 to rotate through a transmission belt.

The specific implementation mode is eight:

as shown in fig. 1 to 11, the transmission part 7 includes a bearing 701 with a seat, a shaft i 702, a gear ii 703 and a pulley iv 704, the bearing 701 with a seat rotates the connecting shaft i 702, and the front end and the rear end of the shaft i 702 are respectively fixedly connected with the gear ii 703 and the pulley iv 704; the gear II 703 is in meshing transmission with the right end face of the rack 10 positioned on the left side, and the belt pulley IV 704 is in transmission connection with the belt pulley III 603 through a synchronous belt. A belt wheel IV 704 drives a shaft I702 to rotate, the shaft I702 drives a gear II 703, the gear I602 drives a rack 10 on the right side to move up and down when rotating, the rack 10 on the right side drives a slow-falling mechanism 5 on the right side to move up and down, it needs to be noted that the movement of two baffles 501 is opposite, for example, when one moves up, the other moves down, the gear II 703 drives the rack 10 on the left side to move up and down when rotating, and the rack 10 on the right side drives the slow-falling mechanism 5 on the right side to move up and down.

The specific implementation method nine:

as shown in fig. 1 to 11, the sub-bucket 8 includes an arc frame 801, a fine sand collecting bucket 802 and a coarse sand outlet 803, the fine sand collecting bucket 802 is fixedly connected to the lower end of the arc frame 801, and the coarse sand outlet 803 is respectively arranged on the front side and the rear side of the left end of the arc frame 801; the arc frame 801 is fixedly connected with the inner end of the base body 101, and the arc frame 801 is positioned right below the first screen body 202. The coarse sand falls out through the coarse sand outlet 803 and the fine sand falls out from under the fine sand hopper 802.

The detailed implementation mode is ten:

as shown in fig. 1-11, the incremental moving device 9 includes a second screen 901, a shaft ii 902 and a motor iii 903, the middle parts of the left and right ends of the second screen 901 are fixedly connected with the shaft ii 902, respectively, and the shaft ii 902 located at the right end is fixedly connected with the output shaft of the motor iii 903; the second screen 901 is connected with the inner end face of the arc frame 801 in a sliding mode, the two shafts II 902 are respectively connected with the left end and the right end of the arc frame 801 in a rotating mode, and the motor III 903 is fixedly connected with the right end of the base body 101. The motor III 903 is started to enable the output shaft of the motor III 903 to rotate in a reciprocating mode according to a fixed stroke, the output shaft of the motor III 903 drives the shaft II 902 located at the right end to rotate, the shaft II 902 drives the second screen 901 to swing in a reciprocating mode at a certain angle, coarse sand on the second screen 901 moves leftwards, the coarse sand can also move forwards and backwards along with the swinging of the second screen 901, fine sand on the second screen 901 moves leftwards and also moves forwards and backwards, fine sand in the process continuously reduces falling to the fine sand collecting hopper 802, the swinging of the second screen 901 increases the stroke of sand screening, the length of the equipment is reduced, the floor area of the equipment is reduced, and the sand fraction efficiency is increased.

The invention relates to a classification sand screening machine, which has the working principle that:

the sand and the stone can be shoveled or dumped into the upper box 301, the sand and the stone are firstly contacted with the flow dividing triangular body 302, the contacted sand and the stone are subjected to a left or right reaction force given by the flow dividing triangular body 302, the reaction force buffers the vertical downward impact force of the sand and the stone and plays a certain flow limiting role, namely the sand and the stone added into the upper box 301 too fast are increased, the buffered sand and the stone continue to fall to the inclined plate 304, the inclined plate 304 completely relieves the impact force of the falling sand and the stone, the service life of the first screen body 202 is prevented from being reduced by the impact force of the falling sand and the stone, the noise generated when the sand and the stone fall can be reduced by the first flow dividing buffering and the second complete buffering of the sand and the stone, and the sand and the stone after the complete buffering continuously and slowly flow to the first screen body 202 through the inclined surface of the; an output shaft of a motor I106 of a starting motor I106 drives a belt wheel I107 to rotate, the belt wheel I107 drives a belt wheel II 403 to rotate through a transmission belt, the belt wheel II 403 drives a main shaft 401 to rotate, the main shaft 401 drives two excitation blocks 402 to rotate, the rotating excitation blocks 402 drive a first screen 2 and a primary collecting hopper 3 to vibrate up and down, the vibration enables sand and stones slowly flowing to a first screen body 202 to almost form a layer to move leftwards on the first screen body 202, screening efficiency is improved, the first screen body 202 is used for separating the sand and stones, the stones continuously roll leftwards, and sand falls onto a second screen 901 through the first screen body 202; starting a motor II 601 to rotate in a forward and reverse circulation manner according to a fixed stroke, an output shaft of the motor II 601 driving a gear I602 and a pulley III 603 to rotate, the pulley III 603 driving a pulley IV 704 to rotate through a transmission belt, the pulley IV 704 driving a shaft I702 to rotate, the shaft I702 driving a gear II 703, the gear I602 driving a rack 10 on the right side to move up and down when rotating, the rack 10 on the right side driving a slow-falling mechanism 5 on the right side to move up and down, it should be noted that the movement of two baffles 501 is opposite, for example, one moves up and the other moves down, the gear II 703 driving the rack 10 on the left side to move up and down when rotating, the rack 10 on the right side driving the slow-falling mechanism 5 on the right side to move up and down, in an initial state, the baffle 501 on the right side is in contact with a first screen body 202, and when the first screen body 202, the purpose of the reciprocating operation is to prevent a layer of sand and stones on the first screen body 202 from rolling down and fully screening the sand and stones, then the baffle 501 on the right side moves upwards to release the stones and the sand and stones which fall subsequently, the first screen body 202 on the left side descends to prevent the released stones and the sand and stones which fall subsequently from fully screening the sand and stones, and then the first screen body 202 on the left side ascends to release the stones and fall out of the left side of the first screen body 202, so that the purpose of the reciprocating operation is to increase the screening time of the single layer of sand and stones on the first screen body 202, reduce the total length of the equipment, reduce the occupied area of the equipment, increase the screening efficiency and reduce the degree of abrasion of the first screen body 202 caused by continuous or direct rolling down of the sand and stones; the motor III 903 is started to enable the output shaft of the motor III 903 to rotate in a reciprocating mode according to a fixed stroke, the output shaft of the motor III 903 drives the shaft II 902 located at the right end to rotate, the shaft II 902 drives the second screen 901 to swing in a reciprocating mode at a certain angle, coarse sand on the second screen 901 moves leftwards and also moves forwards and backwards along with the swinging of the second screen 901, fine sand on the second screen 901 moves leftwards and also moves forwards and backwards, in the process, the fine sand continuously decreases and falls towards the fine sand collecting hopper 802, the swinging of the second screen 901 increases the sand screening stroke, the length of the device is reduced, the floor area of the device is reduced, the fraction efficiency of sand is increased, finally coarse sand falls out through the coarse sand outlet 803, the fine sand falls out from the lower portion of the fine sand collecting hopper 802, and in order to avoid the situation that the stones and the coarse sand are mixed together again after screening, an inclined plate can be arranged at the left end of the blocking frame 201 to.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.

Claims

1. The utility model provides a categorised sand sieving machine, includes base member (1), first screen cloth (2), just receives fill (3), vibrates portion (4), slowly falls mechanism (5), braking portion (6), transmission portion (7), divides fill (8), increases and moves ware (9) and rack (10), its characterized in that: the device is characterized in that a first screen (2) is connected onto a base body (1), the right end of the first screen (2) is fixedly connected with a primary hopper (3), a vibration part (4) is rotatably connected to the middle of the upper side of the first screen (2), two slow-falling mechanisms (5) are arranged, the two slow-falling mechanisms (5) are respectively and slidably connected to the left side and the right side of the middle of the first screen (2), the front ends of the two slow-falling mechanisms (5) are respectively and fixedly connected with a rack (10), the two racks (10) are arranged in mirror symmetry, a braking part (6) is fixedly connected onto the base body (1), the base body (1) is in meshing transmission with the left end face of the rack (10) on the right side, a transmission part (7) is fixedly connected onto the base body (1), the braking part (6) is connected with the transmission part (7) through synchronous belt transmission, the transmission part (7) is in meshing transmission with the right end face of the rack (10), the sub-hopper (8) is positioned under the first screen (2), the movement increasing device (9) is rotationally connected with the sub-hopper (8), the base body (1) comprises a base body (101) and guide rail seats (104), the front end and the rear end of the middle part of the base body (101) are respectively and fixedly connected with the two guide rail seats (104),

the slow falling mechanism (5) comprises a baffle (501), an arc part (502), stabilizing bars (503), compression springs II (504), a strip carrying plate (505), an extension block (506) and a guide block (507), wherein the arc part (502) is arranged at the lower end of the baffle (501), the two stabilizing bars (503) are fixedly connected to the upper end of the baffle (501), the compression springs II (504) are respectively sleeved at the upper ends of the two stabilizing bars (503), the two stabilizing bars (503) are both connected to the strip carrying plate (505) in a sliding manner, the upper ends of the two compression springs II (504) are both in surface contact with the lower end of the strip carrying plate (505), the upper ends of the two stabilizing bars (503) are respectively fixedly connected with a limiting block II, the extension block (506) is fixedly connected to the left end of the strip carrying plate (505), and the front end and the rear end of the strip carrying plate (505; the two extending blocks (506) are fixedly connected with a rack (10) respectively, the two guide blocks (507) on the right side are connected in the two guide rail seats (104) on the right side in a sliding mode, the two guide blocks (507) on the left side are connected in the two guide rail seats (104) on the left side in a sliding mode, the braking portion (6) comprises a motor II (601), a gear I (602) and a belt wheel III (603), and an output shaft of the motor II (601) is fixedly connected with the gear I (602) and the belt wheel III (603); the motor II (601) is fixedly connected to the front end of the base body (101), the gear I (602) is in meshing transmission with the left end face of the rack (10) on the right side, the transmission part (7) comprises a bearing with a seat (701), a shaft I (702), a gear II (703) and a belt pulley IV (704), the bearing with the seat (701) is provided with a rotating connecting shaft I (702), and the front end and the rear end of the shaft I (702) are fixedly connected with the gear II (703) and the belt pulley IV (704) respectively; the gear II (703) is in meshing transmission with the right end face of the rack (10) on the left side, and the belt pulley IV (704) is in transmission connection with the belt pulley III (603) through a synchronous belt.

2. The classifying sand screen of claim 1, wherein: the base body (1) further comprises limiting bolt bodies (102), compression springs I (103), openings (105), motors I (106) and belt pulleys I (107), the four corners of the upper end of the base body (101) are fixedly connected with the limiting bolt bodies (102) respectively, the four limiting bolt bodies (102) are sleeved with the compression springs I (103) respectively, the upper ends of the four limiting bolt bodies (102) are fixedly connected with limiting blocks I respectively, the motors I (106) are fixedly connected onto the base body (101), and the belt pulleys I (107) are fixedly connected onto output shafts of the motors I (106).

3. The classifying sand screen of claim 2, wherein: the first screen (2) comprises a blocking frame (201), a first screen body (202) and a fixing and buffering seat (203), the blocking frame (201) is fixedly connected with the first screen body (202), and four corners of the lower end of the blocking frame (201) are fixedly connected with the fixing and buffering seat (203) respectively; the four fixing and buffering seats (203) are respectively connected to the four limiting bolt bodies (102) in a sliding mode, and the upper ends of the four compression springs I (103) are respectively in contact with the lower ends of the four fixing and buffering seats (203).

4. The classifying sand screen of claim 3, wherein: the primary receiving hopper (3) comprises an upper box (301), a flow dividing triangular body (302), a lower box (303) and an inclined plate (304), wherein the flow dividing triangular body (302) is fixedly connected to the middle of the inner end of the upper box (301), the lower box (303) is fixedly connected to the lower end of the upper box (301), and the inclined plate (304) is fixedly connected to the inner part of the lower box (303); the lower box (303) is fixedly connected to the right end of the baffle frame (201).

5. The classifying sand screen of claim 4, wherein: the oscillating part (4) comprises a main shaft (401), an exciting block (402) and a belt wheel II (403), the left end and the right end of the main shaft (401) are fixedly connected with the exciting block (402) respectively, and the belt wheel II (403) is fixedly connected to the main shaft (401); the front side and the rear side of the main shaft (401) are respectively connected to the front end and the rear end of the blocking frame (201) in a rotating mode, and the belt wheel II (403) is connected with the belt wheel I (107) through a synchronous belt in a transmission mode.

6. The classifying sand screen of claim 5, wherein: the sub-bucket (8) comprises an arc frame (801), a fine sand collecting bucket (802) and a coarse sand outlet (803), the lower end of the arc frame (801) is fixedly connected with the fine sand collecting bucket (802), and the front side and the rear side of the left end of the arc frame (801) are respectively provided with the coarse sand outlet (803); the arc frame (801) is fixedly connected with the inner end of the base body (101), and the arc frame (801) is positioned right below the first screen mesh body (202).

7. The classifying sand screen of claim 6, wherein: the incremental moving device (9) comprises a second screen (901), a shaft II (902) and a motor III (903), the middle parts of the left end and the right end of the second screen (901) are fixedly connected with the shaft II (902) respectively, and the shaft II (902) positioned at the right end is fixedly connected with an output shaft of the motor III (903); the second screen (901) is connected with the inner end face of the arc frame (801) in a sliding mode, the two shafts II (902) are respectively connected with the left end and the right end of the arc frame (801) in a rotating mode, and the motor III (903) is fixedly connected with the right end of the base body (101).