阅读说明：本技术 一种干沙分级筛分设备 (Dry sand grading and screening equipment ) 是由 陶昌强 傅俊 杨欣 于 2019-11-25 设计创作，主要内容包括：本发明涉及筛选设备技术领域,具体涉及一种干沙分级筛分设备,包括筛选箱,还包括控制器、筛分机构和下料机构,筛分机构包括第一推板、推动组件和过滤组件,下料机构包括第二推板和滑动组件,所述推动组件、过滤组件和滑动组件均与控制器为电性连接,本发明的一种干沙分级筛分设备,将现有水平方向的筛选方式改为竖直方向的筛选方式,同时在筛分过程中利用不同大小的过滤孔,将干沙逐层进行筛选,并其筛选速度相比现有技术更快,筛选步骤更简单,明显提升了干沙的筛分效率,进而扩大产量,提高企业收益,同时可将干沙筛分为大、中、小三种颗粒大小的种类并分开收集,筛分的效果明细提升,同时也方便工人的拿取。(The invention relates to the technical field of screening equipment, in particular to dry sand grading screening equipment which comprises a screening box, a controller, a screening mechanism and a blanking mechanism, wherein the screening mechanism comprises a first push plate, a pushing assembly and a filtering assembly, the blanking mechanism comprises a second push plate and a sliding assembly, and the pushing assembly, the filtering assembly and the sliding assembly are all electrically connected with the controller. The screening effect is improved, and meanwhile, the screening device is convenient for workers to take.)

1. The dry sand grading and screening equipment comprises a screening box (1), wherein the screening box (1) is vertically arranged through a plurality of supporting legs, and is characterized by further comprising a controller (2), a screening mechanism (3) and a discharging mechanism (4), the controller (2) is arranged on the outer wall of the screening box (1), the screening mechanism (3) is arranged inside the screening box (1) to distinguish the size of dry sand particles, the screening mechanism (3) comprises a first push plate (3a), a pushing assembly (3b) and a filtering assembly (3c), the pushing assembly (3b) is arranged on one side wall of the screening box (1) through a fixed shell, the first push plate (3a) is fixedly arranged on the pushing assembly (3b), the filtering assembly (3c) is slidably arranged inside the screening box (1), the discharging mechanism (4) is arranged on the back of the screening box (1) through a supporting base to screen dry sand after being discharged, unloading mechanism (4) include second push pedal (4a) and sliding component (4b), sliding component (4b) are established at the top of supporting the base through a supporting bench, second push pedal (4a) vertically establish at the top of supporting the base and with sliding component (4b) fixed connection, promotion subassembly (3b), filtering component (3c) and sliding component (4b) all are electric connection with controller (2).

2. A dry sand classifying and screening apparatus according to claim 1, wherein: promote subassembly (3b) including first motor (3b1), first connecting rod (3b2) and second connecting rod (3b3), first motor (3b1) is fixed to be established at the one end that fixed shell kept away from screening case (1), first connecting rod (3b2) cover is established on its output, second connecting rod (3b3) hinge set up in the one end that first motor (3b1) was kept away from in first connecting rod (3b2) to second connecting rod (3b3) and first push pedal (3a) fixed connection, first motor (3b1) is connected with controller (2) electricity.

3. A dry sand classifying and screening apparatus according to claim 2, wherein: the filter assembly (3c) comprises a first filter basket (3c1), a second filter basket (3c2) and a third filter basket (3c3), wherein the first filter basket (3c1), the second filter basket (3c2) and the third filter basket (3c3) are respectively provided with first filter holes, second filter holes and third filter holes, the first filter holes are larger than the second filter holes, and the second filter holes are larger than the third filter holes.

4. A dry sand classifying and screening apparatus according to claim 3, wherein: the both ends of first filter basket (3c1), second filter basket (3c2) and third filter basket (3c3) are equallyd divide and are equipped with slide bar (3c4) and two pulley (3c5) respectively, and every slide bar (3c4) all passes the lateral wall and first push pedal (3a) fixed connection of screening case (1), and all overlap on every slide bar (3c4) and be equipped with spring (3c6), be equipped with the holding tank that can supply spring (3c6) to hold on the inner wall of screening case (1), the both ends of every spring (3c6) respectively with first filter basket (3c1), second filter basket (3c2) and third filter basket (3c3) a lateral wall, the inner wall of holding tank conflict, every pulley (3c5) all with the inner wall sliding connection of screening case (1), and be equipped with the inner wall that can supply on the screening case (1) every pulley (3c5), the spacing groove that can supply on the sliding filter basket (3c) still be equipped with the first filter basket (3c1) respectively, A slide groove for horizontally sliding the second filter basket (3c2) and the third filter basket (3c 3).

5. A dry sand classifying and screening apparatus according to claim 1, wherein: slide module (4b) includes second motor (4b1), gear (4b2) and slide (4b3), second motor (4b1) are fixed to be established on the supporting bench, gear (4b2) cover is established on its output, slide (4b3) are established at the top of supporting the base through the slider slip to the top of slide (4b3) is equipped with rack (4b4), rack (4b4) and gear (4b2) meshing are connected, and slide (4b3) keep away from the one end and the second push pedal (4a) fixed connection of second motor (4b1), second motor (4b1) are connected with controller (2) electricity.

6. A dry sand classifying and screening apparatus according to claim 3, wherein: the outer wall that slide (4b3) were kept away from in second push pedal (4a) equidistant be provided with be three inserted bar (4a1), every inserted bar (4a1) all inserts with screening case (1) and establish and be connected to every inserted bar (4a1) is kept away from the one end of second push pedal (4a) and all fixedly is equipped with push pedal (4a2), all be equipped with the propulsion mouth that can supply push pedal (4a2) to hold on the outer wall that first filtration basket (3c1), second filtration basket (3c2) and third filtration basket (3c3) are close to inserted bar (4a 1).

7. A dry sand classifying and screening apparatus according to claim 3, wherein: the outer walls, close to the controller (2), of the first filtering basket (3c1), the second filtering basket (3c2) and the third filtering basket (3c3) are provided with push-out openings capable of accommodating the push plate (4a2), and the front wall of the screening box (1) is provided with feed openings in one-to-one correspondence with the push-out openings at equal intervals.

8. A dry sand classifying and screening apparatus according to claim 7, wherein: insert on the feed opening and be equipped with baffle (1a), it is equipped with electric putter (1b) to fix on the antetheca of screening case (1), the output of electric putter (1b) and the top fixed connection of baffle (1a), its other end and screening case (1) fixed connection.

9. A dry sand classifying and screening apparatus according to claim 8, wherein: the both ends of baffle (1a) all are fixed and are equipped with plug bush (1c), every plug bush (1c) all with the antetheca fixed connection of screening case (1).

10. A dry sand classifying and screening apparatus according to claim 1, wherein: the top of screening case (1) has been seted up the drain hole, inlay on the drain hole and be equipped with sealed lid (1d), integrated into one piece is provided with the handle on sealed lid (1 d).

Technical Field

The invention relates to the technical field of screening equipment, in particular to dry sand grading and screening equipment.

Background

The sand can be generally used as a raw material of a building or environment-friendly material, but the sand is used as the raw material, and the particle size of the sand needs to be screened, so that the building or environment-friendly material with different specifications can be manufactured, and the effects of environment protection, building and protection in different degrees are achieved.

Present dry sand screening equipment, mainly be horizontal classified screening mode, dry sand is after getting into the sieve separator, screen cloth through the one deck in the horizontal direction, thereby screening out the dry sand of different particle size, this kind of screening mode, because the screening direction goes on for the level, the screening process is complicated, the screening step is loaded down with trivial details, the time of screening is longer, speed is slower, simultaneously in the screening process, owing to lack seal structure, dry sand spills the sieve separator outside easily, not only resource waste easily, be unfavorable for the environmental maintenance in screening space simultaneously, and the screening effect of current dry sand screening machine remains to promote.

According to the not enough of prior art, therefore it is necessary to design one kind and can practice thrift husky resource, avoid causing the waste, and screening speed is fast simultaneously, and the time is short to can effectively promote the hierarchical screening equipment of dry sand of screening effect.

Disclosure of Invention

The invention aims to provide dry sand grading and screening equipment.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a dry sand classifying and screening device, which comprises a screening box, wherein the screening box is vertically arranged through a plurality of supporting legs, and the screening device also comprises a controller, a screening mechanism and a blanking mechanism, the controller is arranged on the outer wall of the screening box, the screening mechanism is arranged in the screening box to distinguish the particle size of the dry sand, the screening mechanism comprises a first push plate, a pushing component and a filtering component, the pushing component is arranged on one side wall of the screening box through a fixed shell, the first push plate is fixedly arranged on the pushing component, the filtering component is arranged in the screening box in a sliding way, the blanking mechanism is arranged at the back of the screening box through a supporting base to discharge the screened dry sand, the blanking mechanism comprises a second push plate and a sliding component, the sliding component is arranged at the top of the supporting base through a supporting base, the second push plate is vertically arranged at the top of the supporting base and is fixedly connected with the sliding component, the pushing assembly, the filtering assembly and the sliding assembly are electrically connected with the controller.

Further, promote the subassembly and include first motor, first connecting rod and second connecting rod, first motor is fixed to be established in the one end that fixed shell kept away from the screening case, first connecting rod cover is established on its output, the second connecting rod is articulated to be set up in the one end that first motor was kept away from to first connecting rod to second connecting rod and first push pedal fixed connection, first motor is connected with the controller electricity.

Furthermore, the filtering component comprises a first filtering basket, a second filtering basket and a third filtering basket, wherein the first filtering basket, the second filtering basket and the third filtering basket are respectively provided with a first filtering hole, a second filtering hole and a third filtering hole, the first filtering hole is larger than the second filtering hole, and the second filtering hole is larger than the third filtering hole.

Further, the both ends of first filtration basket, second filtration basket and third filtration basket are equallyd divide and do not are equipped with slide bar and two pulleys, and every slide bar all passes the lateral wall and the first push pedal fixed connection of screening case to all the cover is equipped with the spring on every slide bar, be equipped with the holding tank that can supply the spring to hold on the inner wall of screening case, the both ends of every spring are contradicted with the lateral wall of first filtration basket, second filtration basket and third filtration basket, the inner wall of holding tank respectively, and every pulley all with the inner wall sliding connection of screening case to be equipped with on the inner wall of screening case and supply the gliding spacing groove of every pulley, still be equipped with respectively on the inner wall of screening case and supply first filtration basket, second filtration basket and the gliding spout of third filtration basket horizontal slip.

Further, the sliding assembly comprises a second motor, a gear and a sliding plate, the second motor is fixedly arranged on the supporting table, the gear is sleeved on the output end of the second motor, the sliding plate is arranged at the top of the supporting base in a sliding mode through a sliding block, a rack is arranged at the top of the sliding plate and is connected with the gear in a meshed mode, one end, far away from the second motor, of the sliding plate is fixedly connected with the second push plate, and the second motor is electrically connected with the controller.

Furthermore, the equidistant three inserted bars that are provided with of outer wall that the slide was kept away from to the second push pedal, every inserted bar all inserts with the screening case and establishes the connection to the one end that the second push pedal was kept away from to every inserted bar all fixedly is equipped with push plate, first filtration basket, second filtration basket and third filtration basket all are equipped with the mouth that pushes away that can supply push plate to hold on being close to the outer wall of inserted bar.

Furthermore, the outer walls of the first filtering basket, the second filtering basket and the third filtering basket, which are close to the controller, are provided with push-out openings for accommodating the push plate, and the front wall of the screening box is provided with feed openings in one-to-one correspondence with the push-out openings at equal intervals.

Furthermore, insert on the feed opening and be equipped with the baffle, the antetheca of screening case is last to be fixed to be equipped with electric putter, electric putter's output and the top fixed connection of baffle, its other end and screening case fixed connection.

Further, the both ends of baffle all are fixed and are equipped with the plug bush, every the plug bush all with the antetheca fixed connection of screening case.

Further, the drain hole has been seted up at the top of screening case, inlay on the drain hole and be equipped with sealed lid, sealed covering integrated into one piece is provided with the handle.

The invention has the beneficial effects that:

1. according to the invention, through designing the screening box, the baffle and the sealing cover, when the interference screening work is carried out, the screening space is effectively separated from the working environment, so that dry sand can be prevented from spilling out of the screening machine, the waste of sand resources is avoided, and the integral maintenance of the cleanliness of the working environment is facilitated.

2. According to the dry sand screening device, the filtering component and the pushing component are designed, the existing horizontal screening mode is changed into the vertical screening mode, meanwhile, the dry sand is screened layer by using the filtering holes with different sizes in the screening process, the screening speed is higher than that of the prior art, the screening step is simpler, the screening efficiency of the dry sand is obviously improved, the yield is further increased, and the enterprise income is improved.

3. According to the invention, the first filtering basket, the second filtering basket, the third filtering basket, the first filtering hole, the second filtering hole and the third filtering hole are designed, the first filtering hole is designed to be larger than the second filtering hole, and the second filtering hole is designed to be larger than the third filtering hole.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments of the present invention are briefly described below.

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a front view of the present invention;

FIG. 4 is a schematic perspective view of the present invention;

FIG. 5 is an enlarged view of FIG. 4 at B;

FIG. 6 is a top view of the present invention;

FIG. 7 is a plan sectional view taken along line C-C of FIG. 6;

FIG. 8 is an enlarged view of FIG. 7 at D;

FIG. 9 is a schematic perspective view of the sifting mechanism and the blanking mechanism of the present invention;

in the figure: the screening box 1, a baffle 1a, an electric push rod 1b, a plug bush 1c, a sealing cover 1d, a controller 2, a screening mechanism 3, a first push plate 3a, a pushing component 3b, a first motor 3b1, a first connecting rod 3b2, a second connecting rod 3b3, a filtering component 3c, a first filtering basket 3c1, a second filtering basket 3c2, a third filtering basket 3c3, a sliding rod 3c4, a pulley 3c5, a spring 3c6, a blanking mechanism 4, a second push plate 4a, an inserting rod 4a1, a pushing plate 4a2, a sliding component 4b, a second motor 4b1, a gear 4b2, a sliding plate 4b3 and a rack 4b 4.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some components of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product.

Referring to fig. 1 to 9, the dry sand classifying and screening device comprises a screening box 1, wherein the screening box 1 is vertically arranged through a plurality of supporting legs, the device further comprises a controller 2, a screening mechanism 3 and a blanking mechanism 4, the controller 2 is arranged on the outer wall of the screening box 1, the screening mechanism 3 is arranged inside the screening box 1 to distinguish the size of dry sand particles, the screening mechanism 3 comprises a first push plate 3a, a pushing component 3b and a filtering component 3c, the pushing component 3b is arranged on one side wall of the screening box 1 through a fixed shell, the first push plate 3a is fixedly arranged on the pushing component 3b, the filtering component 3c is arranged inside the screening box 1 in a sliding manner, the blanking mechanism 4 is arranged on the back of the screening box 1 through a supporting base to sieve the dry sand after being screened, and the blanking mechanism 4 comprises a second push plate 4a and a sliding component 4b, sliding component 4b establishes at the top of supporting the base through a supporting bench, second push pedal 4a vertically establishes at the top of supporting the base and with sliding component 4b fixed connection, promotion subassembly 3b, filtering component 3c and sliding component 4b all are electric connection with controller 2.

The pushing assembly 3b comprises a first motor 3b1, a first connecting rod 3b2 and a second connecting rod 3b3, the first motor 3b1 is fixedly arranged at one end of the fixed shell far away from the screening box 1, the first connecting rod 3b2 is sleeved at the output end of the first connecting rod, the second connecting rod 3b3 is hinged to one end of the first connecting rod 3b2 far away from the first motor 3b1, the second connecting rod 3b3 is fixedly connected with the first push plate 3a, the first motor 3b1 is electrically connected with the controller 2, and after the sealing cover 1d is tightly covered, the first motor 3b1 is started through the controller 2 to drive the first connecting rod 3b2 to rotate, so that the first connecting rod 3b2 drives the second connecting rod 3b3 to rotate, and the first push plate 3a is driven to slide towards one end far away from the screening box 1.

The filter assembly 3c includes a first filter basket 3c1, a second filter basket 3c2 and a third filter basket 3c3, the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 are respectively provided with a first filter hole, a second filter hole and a third filter hole, and the first filter hole is larger than the second filter hole and the second filter hole is larger than the third filter hole, when the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 slide horizontally, large dry sand grains are retained in the first filter basket 3c1 and medium dry sand grains are retained in the second filter basket 3c2 and small dry sand grains are retained in the third filter basket 3c3, thereby completing the screening of the dry sand.

The two ends of the first filtering basket 3c1, the second filtering basket 3c2 and the third filtering basket 3c3 are respectively provided with a sliding rod 3c4 and two pulleys 3c5, each sliding rod 3c4 penetrates through the side wall of the screening box 1 to be fixedly connected with the first push plate 3a, each sliding rod 3c4 is sleeved with a spring 3c6, the inner wall of the screening box 1 is provided with an accommodating groove for accommodating the spring 3c6, two ends of each spring 3c6 respectively abut against one side wall of the first filtering basket 3c1, the inner wall of the accommodating groove of the second filtering basket 3c2 and the inner wall of the third filtering basket 3c3, each pulley 3c5 is slidably connected with the inner wall of the screening box 1, the inner wall of the screening box 1 is provided with a limiting groove for sliding each pulley 3c5, the inner wall of the screening box 1 is further provided with a horizontal sliding chute for sliding the first filtering basket 1, the second filtering basket 3c 6853 c and the third filtering basket 2 c 583 c 732, when the first push plate 3a slides to the end far from the screening box 1, the three slide bars 3c4 on the first push plate are driven to slide to the end far from the screening box 1, so that the pulley 3c5 at one end of the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 is driven to slide to the end near the first push plate 3a in the limiting groove, after the pulley 3c5 is limited and stops sliding, the slide bar 3c4 is driven to slide to the end far from the first push plate 3a due to the elasticity of the spring 3c6, and the slide bar reciprocates in one go, so that the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 are driven to slide horizontally, and in the sliding process, the screening work of dry sand is completed.

The sliding assembly 4b comprises a second motor 4b1, a gear 4b2 and a sliding plate 4b3, the second motor 4b1 is fixedly arranged on the supporting platform, the gear 4b2 is sleeved on the output end of the gear, the sliding plate 4b3 is arranged on the top of the supporting base in a sliding way through a sliding block, and the top of the sliding plate 4b3 is provided with a rack 4b4, the rack 4b4 is meshed with the gear 4b2, and one end of the sliding plate 4b3 far away from the second motor 4b1 is fixedly connected with the second push plate 4a, the second motor 4b1 is electrically connected with the controller 2, when the dry sand is screened, the second motor 4b1 is started by the controller 2, thereby driving the gear 4b2 to rotate, and because the top of the sliding plate 4b3 is provided with the rack 4b4, the rack 4b4 is meshed and connected with the gear 4b2, therefore, the gear 4b2 drives the sliding plate 4b3 to slide towards the end close to the screening box 1, and further drives the second pushing plate 4a to slide towards the end far away from the second motor 4b 1.

The outer wall of the second push plate 4a far away from the sliding plate 4b3 is provided with three insertion rods 4a1 at equal intervals, each insertion rod 4a1 is inserted and connected with the screening box 1, and one end of each inserting rod 4a1 far away from the second push plate 4a is fixedly provided with a push plate 4a2, the outer walls of the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 close to the insertion rod 4a1 are all provided with pushing inlets for accommodating the pushing plate 4a2, when the second push plate 4a slides to the end far away from the second motor 4b1, the three insert rods 4a1 are driven to slide to the end near the screening box 1, thereby driving the three pushing plates 4a2 to slide towards one end close to the screening box 1 through the three pushing inlets, thus pushing dry sand of different particle sizes inside the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 towards the outside of the screen box 1.

First filtration basket 3c1, second filtration basket 3c2 and third filtration basket 3c3 all are equipped with the export that pushes away that can supply push plate 4a2 to hold on being close to the outer wall of controller 2, the antetheca of screening box 1 equidistant be provided with the feed opening of pushing away mouthful one-to-one, when three push plate 4a2 will sieve the dry sand after propelling movement respectively to first filtration basket 3c1, second filtration basket 3c2 and the feed opening department on the third filtration basket 3c3, discharge from three feed opening on the screening box 1, and then make things convenient for the dry sand of different particle sizes to supply the workman to collect.

Insert on the feed opening and be equipped with baffle 1a, the fixed electric putter 1b that is equipped with on the antetheca of screening case 1, electric putter 1 b's output and baffle 1 a's top fixed connection, its other end and screening case 1 fixed connection, when the dry sand after the needs acquire the screening, start electric putter 1b to start its output and upwards stretch out, and then drive baffle 1a and upwards rise, vacate the feed opening for the unloading.

The both ends of baffle 1a all are fixed and are equipped with plug bush 1c, every plug bush 1c all with screening case 1's antetheca fixed connection, plug bush 1 c's design is used for holding baffle 1a, plays the supporting role.

The drain hole has been seted up at the top of screening case 1, inlay on the drain hole and be equipped with sealed lid 1d, integrated into one piece is provided with the handle on the sealed lid 1d, when carrying out dry sand screening work, at first empties the inside of screening case 1 from the drain hole with dry sand is whole through the manual work, then covers sealed lid 1d tightly through the handle.

The working principle of the invention is as follows: when carrying out dry sand screening work, at first empty the inside to screening case 1 from the drain hole through the manual work with dry sand is whole, then tightly cover 1d through the handle, after sealed lid 1d covers tightly, start first motor 3b1 through controller 2 to it is rotatory to drive first connecting rod 3b2, and then drives second connecting rod 3b3 through first connecting rod 3b2 and rotate, therefore drives first push pedal 3a and slides to the one end of keeping away from screening case 1.

When the first push plate 3a slides to the end far from the screen box 1, the three slide bars 3c4 are driven to slide to the end far from the screen box 1, so as to drive the pulleys 3c5 at the ends of the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 to slide to the end near to the first push plate 3a in the limiting groove, after the pulley 3c5 is limited and stops sliding, the slide bar 3c4 is caused to slide to the end far from the first push plate 3a due to the elasticity of the spring 3c6, and once again, the slide bar reciprocates, so as to drive the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3 to slide horizontally, during the sliding process, as the first filter holes are larger than the second filter holes, the second filter holes are larger than the third filter holes, so that large dry sand particles are retained in the first filter basket 3c1, and the second filter sand 2 of medium particles is retained in the third filter basket 3c2, the small dry sand particles are retained in the third filter basket 3c3, thereby completing the screening work of the dry sand.

When the dry sand is screened, the controller 2 starts the second motor 4b1 to drive the gear 4b2 to rotate, and because the top of the sliding plate 4b3 is provided with the rack 4b4, the rack 4b4 is meshed with the gear 4b2, the gear 4b2 drives the sliding plate 4b3 to slide towards one end close to the screening box 1, so as to drive the second push plate 4a to slide towards one end far from the second motor 4b1, and when the second push plate 4a slides towards one end far from the second motor 4b1, the three inserting rods 4a1 are driven to slide towards one end close to the screening box 1, so as to drive the three pushing plates 4a2 to slide towards one end close to the screening box 1 through the three pushing ports, so as to push the dry sand with different particle sizes in the first filtering basket 3c1, the second filtering basket 3c2 and the third filtering basket 3c3 to the outside of the screening box 1.

When the three pushing plates 4a2 push the screened dry sand to the pushing openings of the first filter basket 3c1, the second filter basket 3c2 and the third filter basket 3c3, the dry sand is discharged from the three discharging openings of the screening box 1, so that the dry sand with different particle sizes can be collected by workers conveniently.

When the dry sand after screening needs to be obtained, the electric push rod 1b is started, so that the output end of the electric push rod is started to extend upwards, the baffle plate 1a is driven to rise upwards, and a discharging opening is vacated for discharging.