CN111558447A

CN111558447A - Grit sieving mechanism

Info

Publication number: CN111558447A
Application number: CN202010429435.3A
Authority: CN
Inventors: 周旋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-08-21

Abstract

The invention relates to the technical field of construction equipment, in particular to a sand and stone screening device which comprises a screening and bearing device, a transfer bearing cavity, a transfer lifting device, a sand and stone crushing device, a sand and stone connecting pipe device, a sand and stone classification box body, a shielding connection cover component, a fine sand collecting barrel component and a middle sand collecting barrel component, wherein sand and stone are added into the classification box through a feeding funnel, the middle sand and stone fall onto a screening inclined plate II through a screening inclined plate I and then are discharged from a discharge port II and fall into a middle sand bearing barrel, the finer sand and stone fall into the fine sand bearing barrel through the screening inclined plate II, the unqualified sand and stone in the sand and stone fall into a crusher through the discharge port I for secondary crushing and then are transferred into the bearing cavity through a connecting pipeline, the crushed sand and stone can be transferred into the classification box for secondary screening by the rotary bearing cavity, so that the utilization rate of the sand, ensuring that all sand is functional.

Description

Grit sieving mechanism

Technical Field

The invention relates to the technical field of construction equipment, in particular to a sand screening device.

Background

Sand, which refers to a loose mixture of sand and gravel. Geologically, mineral or rock particles with a particle size of 0.074-2mm are called sand, and those with a particle size greater than 2mm are called gravel or cobble (the difference is that the particles are rounded to different degrees, and the terms conglomerate and sandstone can be seen in detail). If the crushed stones in the sand are mostly gravel, the sand is called sand gravel. Sandstone is also known as sand in daily life. Need screen the grit when the grit uses, so design a grit sieving mechanism is especially important.

Disclosure of Invention

The invention relates to the technical field of construction equipment, in particular to a gravel screening device which comprises a screening and bearing device, a transmission and bearing cavity, a transmission lifting device, a gravel crushing device, a gravel connecting pipe device, a gravel classification box body, a shielding connecting cover component, a fine sand collecting barrel component and a medium sand collecting barrel component.

A sand and stone screening device comprises a screening and bearing device, the sand and stone screening device also comprises a transmission bearing cavity, a transmission lifting device, a sand and stone crushing device, a sand and stone connecting pipe device, a sand and stone classifying box body, a shielding connection cover component, a fine sand collecting barrel component and a middle sand collecting barrel component, the screening and bearing device is fixedly connected with the transmission bearing cavity, the transmission lifting device is fixedly connected with the transmission bearing cavity, the sand and stone crushing device is fixedly connected with the screening and bearing device, the sand and stone connecting pipe device is fixedly connected with the lower end of the sand and stone crushing device, the sand and stone connecting pipe device is fixedly connected with the transmission bearing cavity, the sand and stone classifying box body is fixedly connected with the screening and bearing device, the sand and stone classifying box body is fixedly connected with the transmission bearing cavity, the shielding connection cover component is fixedly connected above the sand and stone classifying box, the fine sand collecting barrel component is positioned under the sand classifying box body, and the screening and supporting device is fixedly connected with the medium sand collecting barrel component.

As a further optimization of the technical scheme, the screening and supporting device of the sand and stone screening device comprises a fixed bottom plate, a supporting strip I, a fixed frame and a limiting sliding column, wherein the supporting strip I is fixedly connected to the fixed bottom plate, the fixed frame is fixedly connected above the supporting strip I, and the limiting sliding column is fixedly connected to the supporting strip I.

As a further optimization of the technical scheme, the transmission bearing cavity of the sand and stone screening device comprises a support bar II, a fixing ring I, a bearing cavity, a connecting hole I and a transmission pipe, wherein the support bar II is fixedly connected above the fixing bottom plate, the fixing ring I is fixedly connected above the support bar II, the bearing cavity is fixedly connected in the fixing ring I, the connecting hole I is arranged below the bearing cavity, and the transmission pipe is fixedly connected above the bearing cavity.

As a further optimization of the technical scheme, the transmission lifting device of the sand screening device comprises two side sealing circular plates, a connecting shaft, spiral plates and motors, wherein the two side sealing circular plates are fixedly connected to the upper end and the lower end of the bearing cavity respectively, two ends of the connecting shaft are rotatably connected with the two side sealing circular plates respectively, the spiral plates are fixedly connected to the connecting shaft, the motors are fixedly connected below the side sealing circular plates at the lower ends, and output shafts of the motors are fixedly connected with the connecting shaft.

As a further optimization of the technical scheme, the gravel crushing device comprises a support strip III, a fixing ring II, a crusher and a feeding hole, wherein the support strip III is fixedly connected to a fixing bottom plate, the fixing ring II is fixedly connected to the support strip III, the crusher is fixedly connected to the fixing ring II in the fixing ring II, and the feeding hole is fixedly connected to the crusher.

As a further optimization of the technical scheme, the gravel connecting pipe device comprises a connecting pipeline, a switch sliding cavity, a rear blocking plate, a connecting bolt and a switch plate, wherein the upper end and the lower end of the connecting pipeline are fixedly connected with the crusher and the connecting hole I respectively, the switch sliding cavity is arranged on the connecting pipeline, the rear end of the switch sliding cavity is fixedly connected with the rear blocking plate, the connecting bolt is rotatably connected to the rear blocking plate, and the switch plate is slidably connected in the switch sliding cavity and is in threaded transmission connection with the connecting bolt.

As a further optimization of the technical scheme, the sand and stone classification box body comprises a classification box, a screening inclined plate I, a screening inclined plate II, a discharge port I, a discharge port II, a connecting hole II and a discharge port III, the classification box is fixedly connected in a fixed frame, the screening inclined plate I and the screening inclined plate II are fixedly connected in the classification box, the discharge port I and the discharge port II are fixedly connected to the left end and the right end of the classification box respectively, the discharge port I and the discharge port II correspond to the screening inclined plate I and the screening inclined plate II respectively, the discharge port I is located above the feed port, the connecting hole II is arranged above the left end of the classification box, a transmission pipe is fixedly connected in the connecting hole II, and the discharge port III is fixedly connected below the classification.

As a further optimization of the technical scheme, the shielding connecting cover component of the sand and stone screening device comprises an upper cover plate, a feeding funnel, a shielding cover and a handle I, wherein the upper cover plate is fixedly connected above the classification box, the feeding funnel is fixedly connected and communicated with the upper cover plate, the shielding cover is slidably connected on the feeding funnel, and the handle I is fixedly connected above the shielding cover.

As a further optimization of the technical scheme, the fine sand collecting barrel component of the sand screening device comprises a fine sand bearing barrel and a handle II, wherein the fine sand bearing barrel is in contact with a fixed bottom plate and is in sliding connection with a limiting sliding column, the fine sand bearing barrel is located right below a sorting box, and the handle II is fixedly connected with the rear end of the fine sand bearing barrel.

As a further optimization of the technical scheme, the medium sand collecting barrel component of the sand and stone screening device comprises a medium sand bearing barrel, a plugging bolt and an inclined plane plate, wherein the medium sand bearing barrel is fixedly connected to a fixed bottom plate, the medium sand bearing barrel is positioned below a discharge port II, the plugging bolt is connected below the right end of the fixed bottom plate through a thread, and the inclined plane plate is fixedly connected to the bottom end inside the medium sand bearing barrel.

The sand and stone screening device has the beneficial effects that:

add the grit into categorised incasement through feed hopper, well grit can fall on screening swash plate II through screening swash plate I, discharge by discharge gate II again and fall in the well sand carrier bucket, and thinner grit can fall in the fine sand carrier bucket through screening swash plate II, and interior unqualified grit can fall in the rubbing crusher through discharge gate I and carry out the regrinding, transmit the bearing cavity by the connecting tube again in, the pivoted bearing cavity can transmit the categorised case by kibbling grit and carry out the secondary screening, the utilization ratio of grit is higher like this, ensure that all grit all are all effective.

Drawings

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

FIG. 1 is a schematic structural view of a sand screening apparatus according to the present invention;

FIG. 2 is a schematic view of a screening and supporting apparatus;

FIG. 3 is a schematic structural view of a transfer carrier cavity;

FIG. 4 is a schematic view of the transfer elevator;

FIG. 5 is a schematic view of the sand crushing apparatus;

FIG. 6 is a schematic view of the structure of the sand connecting pipe device;

FIG. 7 is a schematic cross-sectional view of the sand-stone connecting pipe device;

FIG. 8 is a schematic view of the structure of the sand classifying box;

FIG. 9 is a cross-sectional view of the sand classifying box;

FIG. 10 is a schematic view of a structure of a shield connecting cover member;

FIG. 11 is a schematic view of a configuration of a component of the fine sand collection barrel;

FIG. 12 is a structural diagram of a middle sand collecting barrel component;

FIG. 13 is a cross-sectional structural view of a sand trap bucket member.

In the figure: a screening and supporting device 1; a fixed base plate 1-1; support strip I1-2; a fixed frame 1-3; 1-4 of a limiting sliding column; a transfer carrying cavity 2; support strip II 2-1; a fixing ring I2-2; a bearing cavity 2-3; connecting hole I2-4; 2-5 of a transfer pipe; a transfer lifting device 3; side seal circular plate 3-1; a connecting shaft 3-2; 3-3 of a spiral plate; 3-4 of a motor; a sand crushing device 4; support strip III 4-1; a fixing ring II 4-2; 4-3 of a pulverizer; 4-4 parts of a feed inlet; a sand and stone connecting pipe device 5; 5-1 of a connecting pipeline; a switch sliding cavity 5-2; 5-3 parts of a rear blocking plate; 5-4 of a connecting bolt; 5-5 of a switch plate; a sand classification box 6; a sorting box 6-1; a screening sloping plate I6-2; a screening sloping plate II 6-3; a discharge port I6-4; a discharge port II 6-5; connecting hole II 6-6; a discharge port III 6-7; a shield connection cover member 7; an upper cover plate 7-1; a charging funnel 7-2; a shielding cover 7-3; handle I7-4; a fine sand collection barrel member 8; 8-1 of a fine sand bearing barrel; handle II 8-2; a medium sand collecting barrel member 9; a medium sand bearing barrel 9-1; plugging bolts 9-2; and an inclined plate 9-3.

Detailed Description

The first embodiment is as follows:

the embodiment is described below by referring to fig. 1-13, the invention relates to the technical field of construction equipment, and more specifically relates to a sand screening device, which comprises a screening and supporting device 1, a transfer bearing cavity 2, a transfer lifting device 3, a sand crushing device 4, a sand connecting pipe device 5, a sand classification box body 6, a shielding connecting cover member 7, a fine sand collecting barrel member 8 and a middle sand collecting barrel member 9, sand is added into the classification box 6-1 through a feeding funnel 7-2, the middle sand falls onto a screening inclined plate II6-3 through a screening inclined plate I6-2, and then is discharged from a discharge port II6-5 and falls into a middle sand bearing barrel 9-1, the finer sand falls into the fine sand bearing barrel 8-1 through the screening inclined plate II6-3, and the unqualified sand falls into a crusher 4-3 through a discharge port I6-4 to be crushed for the second time, then the crushed sand and stone can be transferred into the bearing cavity 2-3 through the connecting pipeline 5-1, and the rotating bearing cavity 2-3 can transfer the crushed sand and stone to the classifying box 6-1 for secondary screening, so that the utilization rate of the sand and stone is higher, and all the sand and stone are ensured to have functions;

a sand and stone screening device comprises a screening and bearing device 1, the sand and stone screening device also comprises a transmission bearing cavity 2, a transmission lifting device 3, a sand and stone crushing device 4, a sand and stone connecting pipe device 5, a sand and stone classification box body 6, a shielding connection cover member 7, a fine sand collecting barrel member 8 and a middle sand collecting barrel member 9, the screening and bearing device 1 plays a role in bearing connection, the transmission bearing cavity 2 is fixedly connected onto the screening and bearing device 1, the transmission bearing cavity 2 can provide a connection space for the transmission lifting device 3, the transmission lifting device 3 is fixedly connected onto the transmission bearing cavity 2, the crushed sand and stone can be driven to transmit by the rotation of the transmission lifting device 3, the sand and stone crushing device 4 is fixedly connected onto the screening and bearing device 1, the sand and stone is crushed by the sand and stone crushing device 4, the sand and stone connecting pipe device 5 is fixedly connected onto the lower end of the sand and stone crushing device, utilize grit connecting pipe device 5 to transmit the transmission by kibbling grit and bear in the

cavity

2, 2 fixed connection of cavity are born with the transmission to grit connecting pipe device 5, screening bearing device 1 goes up the categorised box 6 of fixedly connected with grit, utilize the categorised box 6 of grit to classify the grit, 2 fixed connection of cavity are born with the transmission to the categorised box 6 of grit, the top fixedly connected with of the categorised box 6 of grit shelters from and connects cover member 7, it has certain effect of sheltering from to shelter from to connect cover member 7, prevent that the dust from flying in disorder, sliding connection has fine sand collecting bucket component 8 on the screening bearing device 1, fine sand collecting bucket component 8 can be collected fine grit, fine sand collecting bucket component 8 is located the categorised box 6 of grit under, sand collecting bucket component 9 in the last fixedly connected with of screening bearing device 1, but grit such as middle sand collecting bucket component 9 centering is collected.

The second embodiment is as follows:

the embodiment is described below with reference to fig. 1-13, and the screening and supporting apparatus 1 described in the embodiment further describes the embodiment includes a fixed bottom plate 1-1, a supporting strip I1-2, a fixed frame 1-3 and a limiting sliding column 1-4, the fixed bottom plate 1-1 plays a role of supporting and fixing support, the supporting strip I1-2 is fixedly connected to the fixed bottom plate 1-1, the supporting strip I1-2 can provide a fixed space for the fixed frame 1-3, the fixed frame 1-3 is fixedly connected above the supporting strip I1-2, the fixed frame 1-3 can provide a fixed space for the classification box 6-1, the limiting sliding column 1-4 is fixedly connected to the supporting strip I1-2, and after the limiting sliding column 1-4 is provided, the position of the fine sand bearing barrel 8-1 is fixed, ensuring that the fine sand bearing barrel 8-1 is always positioned right below the discharge port III 6-7.

The third concrete implementation mode:

the embodiment is described below with reference to fig. 1 to 13, and the embodiment will be further described, where the transfer bearing cavity 2 includes a support strip II2-1, a fixing ring I2-2, a bearing cavity 2-3, a connecting hole I2-4, and a transfer pipe 2-5, the support strip II2-1 is fixedly connected above the fixing bottom plate 1-1, the support strip II2-1 plays a supporting role, the fixing ring I2-2 is fixedly connected above the support strip II2-1, the fixing ring I2-2 can provide a fixing role for the bearing cavity 2-3, the bearing cavity 2-3 is fixedly connected in the fixing ring I2-2, the bearing cavity 2-3 plays a bearing connection role, the connecting hole I2-4 is arranged below the bearing cavity 2-3, the connecting hole I2-4 can provide a fixing space for the connecting pipe 5-1, a transfer pipe 2-5 is fixedly connected above the bearing cavity 2-3, and crushed sand and stone are transferred into the classification box 6-1 by the transfer pipe 2-5.

The fourth concrete implementation mode:

the present embodiment is described below with reference to fig. 1-13, and the transmission lifting device 3 further described in the third embodiment includes two side sealing circular plates 3-1, a connecting shaft 3-2, spiral plates 3-3 and a motor 3-4, where the two side sealing circular plates 3-1 are respectively and fixedly connected to the upper and lower ends of the bearing cavity 2-3, the two side sealing circular plates 3-1 can provide a connecting space for the connecting shaft 3-2, two ends of the connecting shaft 3-2 are respectively and rotatably connected to the two side sealing circular plates 3-1, the connecting shaft 3-2 can drive the spiral plates 3-3 to rotate in the bearing cavity 2-3, the spiral plates 3-3 are fixedly connected to the connecting shaft 3-2, and the rotated spiral plates 3-3 can transfer crushed sand, the sand and stone move upwards, so that the sand and stone can enter the transmission pipe 2-5, the motor 3-4 is fixedly connected below the side sealing circular plate 3-1 at the lower end, the output shaft of the motor 3-4 is fixedly connected with the connecting shaft 3-2, and the motor 3-4 can drive the connecting shaft 3-2 to rotate.

The fifth concrete implementation mode:

the sand crushing device 4 of the second embodiment comprises a support strip III4-1 and a fixing ring II4-2, the crusher comprises a crusher 4-3 and a feed port 4-4, a support strip III4-1 is fixedly connected to a fixed bottom plate 1-1, the support strip III4-1 plays a role of bearing and supporting, a fixing ring II4-2 is fixedly connected to the support strip III4-1, the fixing ring II4-2 can provide a fixed space for the crusher 4-3, a crusher 4-3 is fixedly connected to the fixing ring II4-2, sand can be crushed by the crusher 4-3, the feed port 4-4 is fixedly connected to the crusher 4-3, and sand is added into the crusher 4-3 through the feed port 4-4.

The sixth specific implementation mode:

the sand and stone connecting pipe device 5 comprises a connecting pipe 5-1, a switch sliding cavity 5-2, a rear blocking plate 5-3, a connecting bolt 5-4 and a switchThe plate 5-5, the upper end and the lower end of the connecting pipeline 5-1 are respectively fixedly connected with the crusher 4-3 and the connecting hole I2-4, crushed gravels are transferred into the bearing cavity 2-3 by the connecting pipeline 5-1, the connecting pipeline 5-1 is provided with a switch sliding cavity 5-2, the switch sliding cavity 5-2 can provide a sliding space for the switch plate 5-5, the rear end of the switch sliding cavity 5-2 is fixedly connected with a rear plugging plate 5-3, the rear plugging plate 5-3 can provide a connecting space for the connecting bolt 5-4, the rear plugging plate 5-3 is rotatably connected with the connecting bolt 5-4, the connecting bolt 5-4 is used for driving the switch plate 5-5 to move, so that the connecting pipeline 5-1 is switched, the switch plate 5-5 is slidably connected in the switch sliding cavity 5-2 and is in threaded transmission connection with the connecting bolt 5-4 Then, when all the gravels are

After crushing, the connecting bolt 5-4 is rotated to drive the switch plate 5-5 to move, so that sand and stones enter the bearing cavity 2-3, and all sand and stones can be crushed.

The seventh embodiment:

the sand classifying box 6 further described in the fifth embodiment includes a classifying box 6-1, a classifying sloping plate I6-2, a classifying sloping plate II6-3, a discharging port I6-4, a discharging port II6-5, a connecting hole II6-6 and a discharging port III6-7, the classifying box 6-1 is fixedly connected in a fixing frame 1-3, the classifying box 6-1 is used for classifying sand, the classifying box 6-1 is fixedly connected with the classifying sloping plate I6-2 and the classifying sloping plate II6-3, the left and right ends of the classifying box 6-1 are respectively fixedly connected with a discharging port I6-4 and a discharging port II6-5, the discharging port I6-4 and the discharging port II6-5 are respectively corresponding to the classifying sloping plate I6-2 and the classifying sloping plate II6-3, the discharge port I6-4 is positioned above the feed port 4-4, a connecting hole II6-6 is arranged above the left end of the classification box 6-1, the transfer pipe 2-5 is fixedly connected in the connecting hole II6-6, the discharge port III6-7 is fixedly connected below the classification box 6-1, when the sand which does not meet the conditions falls on the screening sloping plate I6-2, the sand is directly discharged from the discharge port I6-4 and falls into the feed port 4-4, and finally enters the crusher 4-3 for crushing, the sand meeting the standard can directly fall on the screening sloping plate II6-3 and is discharged from the discharge port II6-5 to directly fall into the medium sand bearing barrel 9-1, the fine sand falls down through the screening sloping plate II6-3 and is discharged through the discharge port III6-7 to fall into the fine sand bearing barrel 8-1.

The specific implementation mode is eight:

this embodiment mode will be described below with reference to fig. 1 to 13, and this embodiment mode will further describe embodiment mode seven: the shielding connecting cover component 7 comprises an upper cover plate 7-1, a feeding funnel 7-2, a shielding cover 7-3 and a handle I7-4, the upper cover plate 7-1 is fixedly connected above the classification box 6-1 through screws, the upper cover plate 7-1 has a certain shielding effect, the feeding funnel 7-2 is fixedly connected to the upper cover plate 7-1 and communicated with the upper cover plate, gravel is added into the device through the feeding funnel 7-2, the shielding cover 7-3 is slidably connected to the feeding funnel 7-2, the shielding cover 7-3 has a shielding effect and prevents sundries from falling into the device, the handle I7-4 is fixedly connected above the shielding cover 7-3, and the shielding cover 7-3 is convenient to detach after the handle I7-4 is arranged.

The specific implementation method nine:

the embodiment is described below with reference to fig. 1 to 13, and the fine sand collecting barrel component 8 further described in the seventh embodiment includes a fine sand carrying barrel 8-1 and a handle II8-2, the fine sand carrying barrel 8-1 contacts with a fixed bottom plate 1-1, the fine sand carrying barrel 8-1 is slidably connected with a limiting sliding column 1-4, the fine sand carrying barrel 8-1 is located right below a sorting box 6-1, fine sand can be stored in the fine sand carrying barrel 8-1, when fine sand is needed, the fine sand is convenient to take, the handle II8-2 is fixedly connected to the rear end of the fine sand carrying barrel 8-1, and the fine sand carrying barrel 8-1 can be taken out by the handle II 8-2.

The detailed implementation mode is ten:

the embodiment is described below with reference to fig. 1-13, and the ninth embodiment is further described in the present embodiment, in which the middle sand collecting barrel member 9 includes a middle sand carrying barrel 9-1, a blocking bolt 9-2 and an inclined plane plate 9-3, the middle sand carrying barrel 9-1 is fixedly connected to a fixed bottom plate 1-1, the middle sand carrying barrel 9-1 is located below a discharge port II6-5, middle sand is stored by using the middle sand carrying barrel 9-1, the lower part of the right end of the fixed bottom plate 1-1 is connected with the blocking bolt 9-2 through a screw thread, the blocking bolt 9-2 can block a sand outlet of the middle sand carrying barrel 9-1, when the middle sand is needed, the blocking bolt 9-2 is rotated, so that the sand can be discharged from the middle sand carrying barrel 9-1, the inclined plane plate 9-3 is fixedly connected to the bottom end inside the middle sand carrying barrel 9-1, the medium sand falls into the medium sand bearing barrel 9-1 and then leaks onto the inclined plane plate 9-3, so that the medium sand is discharged more thoroughly without residual sand.

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

pulling a handle I7-4 to take down a shielding cover 7-3, adding the sand into a classification box 6-1 through a feeding funnel 7-2, directly discharging the sand which does not accord with the conditions from a discharge port I6-4 to a feed port 4-4 after falling on a screening inclined plate I6-2, finally feeding the sand into a crusher 4-3 for crushing, directly discharging the sand which accords with the standards to a screening inclined plate II6-3, and directly discharging the sand from a discharge port II6-5 to a medium sand bearing barrel 9-1, discharging the fine sand through the screening inclined plate II6-3 and discharging the sand through a discharge port III6-7 to a fine sand bearing barrel 8-1, rotating a connecting bolt 5-4 to drive a switch plate 5-5 to move after secondarily crushing the sand which does not accord with the standards in the crusher 4-3, crushed sandstone can fall into the bearing cavity 2-3, the starting motor 3-4 drives the spiral plate 3-3 to rotate through the connecting shaft 3-2, the rotary spiral plate 3-3 can drive the sandstone to move upwards and finally fall into the transmission pipe 2-5, the sandstone entering the transmission pipe 2-5 can slide into the classification box 6-1 to be screened again, the sandstone with composite standard can be discharged, and unqualified sandstone can be crushed for the second time until the composite standard is reached, so that the utilization rate of the sandstone is higher, and all the sandstone is ensured to have effects.

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 grit sieving mechanism, includes screening supporting device (1), its characterized in that: the sand screening device also comprises a transmission bearing cavity (2), a transmission lifting device (3), a sand crushing device (4), a sand connecting pipe device (5), a sand classifying box body (6), a shielding connecting cover component (7), a fine sand collecting barrel component (8) and a sand collecting barrel component (9), wherein the transmission bearing cavity (2) is fixedly connected on the screening bearing device (1), the transmission lifting device (3) is fixedly connected on the transmission bearing cavity (2), the sand crushing device (4) is fixedly connected on the screening bearing device (1), the sand connecting pipe device (5) is fixedly connected at the lower end of the sand crushing device (4), the sand connecting pipe device (5) is fixedly connected with the transmission bearing cavity (2), the sand classifying box body (6) is fixedly connected on the screening bearing device (1), and the sand classifying box body (6) is fixedly connected with the transmission bearing cavity (2), the top fixedly connected with of grit classification box (6) shelters from and connects lid component (7), and sliding connection has fine sand collecting vessel component (8) on screening bearing device (1), and fine sand collecting vessel component (8) are located grit classification box (6) under, and fixedly connected with middlings collecting vessel component (9) on screening bearing device (1).

2. A sand screening apparatus according to claim 1, wherein: the screening and bearing device (1) comprises a fixing bottom plate (1-1), a supporting strip I (1-2), a fixing frame (1-3) and a limiting sliding column (1-4), wherein the supporting strip I (1-2) is fixedly connected to the fixing bottom plate (1-1), the fixing frame (1-3) is fixedly connected to the upper portion of the supporting strip I (1-2), and the limiting sliding column (1-4) is fixedly connected to the supporting strip I (1-2).

3. A sand screening apparatus according to claim 2, wherein: the transmission bearing cavity (2) comprises a support bar II (2-1), a fixing ring I (2-2), a bearing cavity (2-3), a connecting hole I (2-4) and a transmission pipe (2-5), the support bar II (2-1) is fixedly connected above the fixing bottom plate (1-1), the fixing ring I (2-2) is fixedly connected above the support bar II (2-1), the bearing cavity (2-3) is fixedly connected in the fixing ring I (2-2), the connecting hole I (2-4) is arranged below the bearing cavity (2-3), and the transmission pipe (2-5) is fixedly connected above the bearing cavity (2-3).

4. A sand screening apparatus according to claim 3, wherein: the transmission lifting device (3) comprises two side sealing circular plates (3-1), a connecting shaft (3-2), spiral plates (3-3) and motors (3-4), wherein the two side sealing circular plates (3-1) are fixedly connected to the upper end and the lower end of the bearing cavity (2-3) respectively, two ends of the connecting shaft (3-2) are rotatably connected with the two side sealing circular plates (3-1) respectively, the spiral plates (3-3) are fixedly connected to the connecting shaft (3-2), the motors (3-4) are fixedly connected below the side sealing circular plates (3-1) at the lower end, and output shafts of the motors (3-4) are fixedly connected with the connecting shaft (3-2).

5. A sand screening apparatus according to claim 2, wherein: the gravel crushing device (4) comprises a support strip III (4-1), a fixing ring II (4-2), a crusher (4-3) and a feeding hole (4-4), the support strip III (4-1) is fixedly connected to the fixing bottom plate (1-1), the fixing ring II (4-2) is fixedly connected to the support strip III (4-1), the crusher (4-3) is fixedly connected to the fixing ring II (4-2), and the feeding hole (4-4) is fixedly connected to the crusher (4-3).

6. A sand screening apparatus according to claim 5, wherein: the sand and stone connecting pipe device (5) comprises a connecting pipeline (5-1), a switch sliding cavity (5-2), a rear plugging plate (5-3), a connecting bolt (5-4) and a switch plate (5-5), wherein the upper end and the lower end of the connecting pipeline (5-1) are fixedly connected with a crusher (4-3) and a connecting hole I (2-4) respectively, the switch sliding cavity (5-2) is arranged on the connecting pipeline (5-1), the rear end of the switch sliding cavity (5-2) is fixedly connected with the rear plugging plate (5-3), the rear plugging plate (5-3) is rotatably connected with the connecting bolt (5-4), and the switch plate (5-5) is slidably connected in the switch sliding cavity (5-2) and is in threaded transmission connection with the connecting bolt (5-4).

7. A sand screening apparatus according to claim 5, wherein: the sand classifying box body (6) comprises a classifying box (6-1), a screening inclined plate I (6-2), a screening inclined plate II (6-3), a discharge port I (6-4), a discharge port II (6-5), a connecting hole II (6-6) and a discharge port III (6-7), the classifying box (6-1) is fixedly connected in a fixing frame (1-3), the classifying box (6-1) is internally and fixedly connected with the screening inclined plate I (6-2) and the screening inclined plate II (6-3), the left end and the right end of the classifying box (6-1) are respectively and fixedly connected with the discharge port I (6-4) and the discharge port II (6-5), the discharge port I (6-4) and the discharge port II (6-5) respectively correspond to the screening inclined plate I (6-2) and the screening inclined plate II (6-3), the discharge port I (6-4) is positioned above the feed port (4-4), a connecting hole II (6-6) is arranged above the left end of the classifying box (6-1), the transfer pipe (2-5) is fixedly connected in the connecting hole II (6-6), and the discharge port III (6-7) is fixedly connected below the classifying box (6-1).

8. A sand screening apparatus according to claim 7, wherein: the shielding connecting cover component (7) comprises an upper cover plate (7-1), a feeding funnel (7-2), a shielding cover (7-3) and a handle I (7-4), the upper cover plate (7-1) is fixedly connected above the classifying box (6-1), the feeding funnel (7-2) is fixedly connected on the upper cover plate (7-1) and communicated with the upper cover plate, the shielding cover (7-3) is slidably connected on the feeding funnel (7-2), and the handle I (7-4) is fixedly connected above the shielding cover (7-3).

9. A sand screening apparatus according to claim 7, wherein: the fine sand collecting barrel component (8) comprises a fine sand bearing barrel (8-1) and a handle II (8-2), the fine sand bearing barrel (8-1) is in contact with the fixed bottom plate (1-1), the fine sand bearing barrel (8-1) is in sliding connection with the limiting sliding column (1-4), the fine sand bearing barrel (8-1) is located under the classification box (6-1), and the handle II (8-2) is fixedly connected to the rear end of the fine sand bearing barrel (8-1).

10. A sand screening apparatus according to claim 9, wherein: the medium sand collecting barrel component (9) comprises a medium sand bearing barrel (9-1), a plugging bolt (9-2) and an inclined plane plate (9-3), the medium sand bearing barrel (9-1) is fixedly connected to a fixed bottom plate (1-1), the medium sand bearing barrel (9-1) is located below a discharge port II (6-5), the plugging bolt (9-2) is connected to the lower portion of the right end of the fixed bottom plate (1-1) through threads, and the inclined plane plate (9-3) is fixedly connected to the bottom end of the inner portion of the medium sand bearing barrel (9-1).