CN115591766A

CN115591766A - Multilayer height-distributed plate-type advanced sand screening machine

Info

Publication number: CN115591766A
Application number: CN202211349561.3A
Authority: CN
Inventors: 颜国光; 颜泽寰; 颜焱生
Original assignee: Hunan Youyi Building Materials Co ltd
Current assignee: Hunan Youyi Building Materials Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-01-13

Abstract

The invention relates to a plate-type advanced sand screening machine with multilayer height distribution, which comprises: a base; the screen plates are provided with three groups of screen plates which are all arranged on the base in parallel, one ends of the three groups of screen plates are connected with a connecting frame arranged on the base, the other ends of the three groups of screen plates are connected with a vertical rod, and a baffle plate for plugging the screen plates is fixedly arranged on the vertical rod; the power assembly is arranged on the base and connected with the sieve plate; the paving mechanism is arranged on the base and connected with the power assembly, the paving mechanism comprises a reciprocating assembly and a longitudinal offset assembly, a plurality of scraping rods are arranged on the longitudinal offset assembly at equal intervals, and when the reciprocating assembly drives the longitudinal offset assembly to move to the end of a stroke, the longitudinal offset assembly can drive the scraping rods to move in a direction perpendicular to the length direction of the base; the supporting component is connected with the sieve plate and the power component, the supporting component comprises an elastic structure and a pull-down sleeve, the elastic structure is matched with the pull-down sleeve, the sieve plate can be kept in a horizontal or inclined state, and the sieve plate can be effectively screened by gravel.

Description

Multilayer height-distributed plate-type advanced sand screening machine

Technical Field

The invention relates to the field of gravel screening, in particular to a plate-type advanced sand screening machine with multiple layers of high-low distribution.

Background

The sand screening machine adopts a horizontally arranged roller screening drum according to the working principle of manually screening sand by using an inclined screen, and ensures that material flow can continuously roll and screen for more than five circles among a plurality of circles of internal spiral blades in the screening drum, so that sand materials are repeatedly rolled and slid to be fully dispersed and separated; different from mutual pushing and burying of large and small materials caused by an inclined roller screen, the screening process is hasty; and the vibration jumping and mixing of the materials are different from those of the inclined vibrating screen.

When the existing sand screening machine is used, most of the existing sand screening machines need to dump enough gravel into the sand screening machine to improve the sand screening speed, but the operating mode easily causes the phenomenon that the gravel blocks the sieve holes, so that the screening speed and the screening effect of the sand screening machine are reduced.

Disclosure of Invention

The invention aims to provide a plate type advanced sand screening machine with multilayer height distribution, which solves the problems in the background technology.

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

a plate-type advanced sand screening machine with multi-layer height distribution comprises:

a base;

the screen plates are provided with three groups in total and are all arranged on the base in parallel, one ends of the three groups of screen plates are connected with a connecting frame arranged on the base, the other ends of the three groups of screen plates are connected with vertical rods, and baffles used for plugging the screen plates are fixedly arranged on the vertical rods;

the power assembly is arranged on the base and connected with the sieve plate, and the power assembly can drive the sieve plate to reciprocate along the length direction of the base;

the paving mechanism is installed on the base and connected with the power assembly, the paving mechanism comprises a reciprocating assembly and a longitudinal offset assembly, a plurality of scraping rods are arranged on the longitudinal offset assembly at equal intervals, and when the reciprocating assembly drives the longitudinal offset assembly to move to the stroke end, the longitudinal offset assembly can drive the scraping rods to move in the direction perpendicular to the length direction of the base;

the support assembly is connected with the sieve plate and the power assembly, the support assembly comprises an elastic structure and a pull-down sleeve, and the elastic structure is matched with the pull-down sleeve to enable the sieve plate to keep a horizontal or inclined state.

As a further scheme of the invention: the base is provided with a bearing plate parallel to the base, the bearing plate is fixedly connected with the connecting frame, the bearing plate is also provided with a plurality of first sliding sleeves, and the first sliding sleeves are in sliding connection with first guide rods arranged on the base;

the power assembly comprises a driving device fixedly mounted on the base, an output shaft of the driving device penetrates through the base and is connected with a rotating piece, one end, far away from the rotating center, of the rotating piece is provided with a first pulley, and the first pulley is in sliding connection with an embedded plate fixed on the bearing plate.

As a still further scheme of the invention: the reciprocating assembly comprises an installation plate fixedly installed on the base, two driving wheels are rotatably installed on the installation plate, and a driving belt is sleeved between the two driving wheels;

a rotating shaft of one of the driving wheels is connected with a driving rod which is rotatably arranged on the base through a second belt, and one end of the driving rod, far away from the second belt, is connected with a rotating shaft of the rotating part through a first belt;

the reciprocating assembly further comprises a fitting structure connecting the transmission belt and the longitudinal offset assembly.

As a still further scheme of the invention: the embedding structure comprises a second pulley rotatably mounted on the transmission belt and a sliding groove formed in the longitudinal deviation assembly, and the second pulley can slide in the sliding groove.

As a still further scheme of the invention: the longitudinal deviation assembly comprises two second guide rods fixedly arranged on the mounting plate, a second sliding sleeve is rotatably arranged on each second guide rod, a connecting rod is fixedly arranged on each second sliding sleeve, and a sliding block is fixedly arranged at one end, far away from the second sliding sleeve, of each connecting rod;

the longitudinal deviation assembly further comprises a connecting frame connected with the scraping rod, a sliding block is arranged in the connecting frame in a sliding mode, a follower is arranged on the connecting frame in a sliding mode, and the follower is provided with the sliding groove;

the longitudinally offset assembly further includes an abutment structure.

As a still further scheme of the invention: the butt structure includes that the symmetry rotates to be installed two butt wheels on the connecting frame and be the diagonal angle setting and be in two set-squares on the mounting panel, the set-square with the cooperation of butt wheel can order about the connecting frame motion.

As a still further scheme of the invention: the elastic structure comprises a plurality of rotary sleeves rotatably mounted on the bearing plate, telescopic rods are slidably mounted in the rotary sleeves, and one ends of the telescopic rods, far away from the rotary sleeves, are rotatably connected with the sieve plates positioned at the lower parts;

still be provided with the spring in the rotatory sleeve, the one end of spring with rotatory sleeve's inner wall is connected, the other end with the telescopic link is connected.

As a still further scheme of the invention: the pull-down external member comprises air cylinders symmetrically arranged on the bearing plate, pull wheels are rotatably arranged on the telescopic ends of the air cylinders, and the pull wheels are matched with the sieve plate in a rolling mode.

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

through the multiple groups of sieve plates, the sieve holes of the multiple groups of sieve plates are gradually reduced from top to bottom, so that multi-level screening of gravel is realized;

through the reciprocal subassembly and the longitudinal deviation subassembly that set up, make and scrape pole reciprocating motion to make the gravel of arranging in the sieve be scraped open, make the more even distribution of gravel in the sieve, thereby improve the availability factor of sieve mesh in the sieve, avoid gravel to pile up in certain region of sieve, lead to screening speed to descend, avoided the sieve mesh to be by the risk of gravel jam simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a multi-layer high-low distribution plate-type advanced sand screening machine.

Fig. 2 is a schematic structural diagram of another angle in an embodiment of a multi-layer height-distributed plate-type advanced sand screening machine.

Fig. 3 is a schematic structural diagram of a power assembly in an embodiment of a multilayer high-low distribution plate-type advanced sand screening machine.

Fig. 4 is a schematic structural diagram of a sieve plate and a baffle plate in an embodiment of a multi-layer high-low distribution plate-type advanced sand screening machine.

Fig. 5 is a schematic diagram of an elastic structure in an embodiment of a multi-layer high-low distribution plate-type advanced sand screening machine.

Fig. 6 is a schematic structural diagram of a reciprocating assembly and a screen plate in an embodiment of a multi-layer high-low distribution plate-type progressive sand screening machine.

Fig. 7 is an exploded view of a reciprocating assembly in an embodiment of a multi-layer high-low distribution plate-type advanced sand screening machine.

Fig. 8 is a schematic structural diagram of a longitudinal offset assembly in an embodiment of a multi-layer high-low distribution plate-type advanced sand screening machine.

In the figure: 1. a base; 2. a drive device; 3. a rotating member; 4. a first pulley; 5. a tabling plate; 6. a bearing plate; 7. a first sliding sleeve; 8. a first guide rod; 9. a sieve plate; 10. a telescopic rod; 11. rotating the sleeve; 12. a spring; 13. a cylinder; 14. pulling a wheel; 15. a connecting frame; 16. a baffle plate; 17. a vertical rod; 18. a first belt; 19. a transmission rod; 20. a second belt; 21. mounting a plate; 22. a driving wheel; 23. a transmission belt; 2301. a second pulley; 24. a follower; 25. a chute; 26. a connecting frame; 27. a slider; 28. a second sliding sleeve; 29. a second guide rod; 30. a butting wheel; 31. a set square; 32. a scraping rod.

Detailed Description

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

In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Referring to fig. 1 to 8, in an embodiment of the present invention, a multi-layer plate-type advanced sand screening machine with high and low distributions includes: base 1, sieve 9, power component, paving mechanism and supporting component.

The power assembly is arranged on the base 1 and connected with the sieve plate 9, and the power assembly can drive the sieve plate 9 to reciprocate along the length direction of the base 1;

the base 1 is provided with a bearing plate 6 parallel to the base, the bearing plate 6 is fixedly connected with the connecting frame 15, the bearing plate 6 is further provided with a plurality of first sliding sleeves 7, and the first sliding sleeves 7 are in sliding connection with first guide rods 8 arranged on the base 1;

the power assembly comprises a driving device 2 fixedly mounted on the base 1, an output shaft of the driving device 2 penetrates through the base 1 and is connected with a rotating part 3, one end, far away from a rotation center of the rotating part 3, of the rotating part 3 is provided with a first pulley 4, and the first pulley 4 is in sliding connection with an embedded plate 5 fixed on the bearing plate 6.

When the gravel falling device is used, gravel with screening is poured into the screen plate 9, the driving device 2 is started at the same time, the output shaft of the driving device 2 drives the rotating part 3 connected with the driving device to rotate at the moment, the first pulley 4 connected with the rotating part 3 makes circular motion, the first pulley 4 slides in the embedded plate 5, when the first pulley 4 makes circular motion, the first pulley reciprocates in the embedded plate 5 and drives the embedded plate 5 to drive the bearing plate 6 to reciprocate along the length direction of the first guide rod 8, so that the screen plate 9 makes reciprocating motion, and when the screen plate 9 reversely moves after moving to the stroke end each time, gravel inside the screen plate and the screen plate 9 slide relatively due to inertia, so that the gravel falling speed from the screen plate 9 is higher.

Through the aforesaid setting for sieve 9 is at the in-process reciprocating motion of screening grit to take place relative sliding between its inside grit when its reverse motion, make the grit faster filter out by the sieve mesh, improve the screening speed of grit.

Referring to fig. 6, 7 and 8, the spreading mechanism is mounted on the base 1 and connected to the power assembly, the spreading mechanism includes a reciprocating assembly and a longitudinal offset assembly, the longitudinal offset assembly is provided with a plurality of scraping rods 32 at equal intervals, and when the reciprocating assembly drives the longitudinal offset assembly to move to the end of the stroke, the longitudinal offset assembly can drive the scraping rods 32 to move perpendicular to the length direction of the base 1;

the reciprocating assembly comprises an installation plate 21 fixedly installed on the base 1, two driving wheels 22 are rotatably installed on the installation plate 21, and a driving belt 23 is sleeved between the two driving wheels 22;

a rotating shaft of one of the driving wheels 22 is connected with a driving rod 19 which is rotatably arranged on the base 1 through a second belt 20, and one end of the driving rod 19, which is far away from the second belt 20, is connected with the rotating shaft of the rotating member 3 through a first belt 18;

the reciprocating component further comprises a jogged structure for connecting the transmission belt 23 and the longitudinal offset component, the jogged structure comprises a second pulley 2301 rotatably mounted on the transmission belt 23 and a sliding groove 25 arranged on the longitudinal offset component, and the second pulley 2301 can slide in the sliding groove 25;

the longitudinal deviation assembly comprises two second guide rods 29 fixedly installed on the installation plate 21, a second sliding sleeve 28 is installed on each second guide rod 29 in a rotating mode, a connecting rod is fixed on each second sliding sleeve 28, and a sliding block 27 is fixed at one end, far away from the second sliding sleeve 28, of each connecting rod;

the longitudinal offset assembly further comprises a connecting frame 26 connected with the scraping rod 32, a sliding block 27 is slidably arranged in the connecting frame 26, a follower 24 is slidably arranged on the connecting frame 26, and the sliding groove 25 is arranged on the follower 24;

the longitudinal deviation assembly further comprises a butt joint structure, the butt joint structure comprises two butt joint wheels 30 which are symmetrically and rotatably installed on the connecting frame 26 and two triangular plates 31 which are diagonally arranged on the mounting plate 21, and the triangular plates 31 are matched with the butt joint wheels 30 and can drive the connecting frame 26 to move.

When the driving device 2 works, the output shaft drives the transmission rod 19 to rotate through the first belt 18, at the same time, the transmission rod 19 drives one of the transmission wheels 22 to rotate through the second belt 20, and the transmission belt 23 sleeved between the two transmission wheels 22 moves, when the transmission belt 23 moves, the transmission rod 19 drives the second pulley 2301 connected with the transmission rod to follow, the second pulley 2301 is arranged in the sliding groove 25 in the follower 24 in a sliding manner, so that when the second pulley 2301 follows the transmission belt 23 to do linear motion, the follower 24 will follow to do linear motion, when the second pulley 2301 follows the transmission belt 23 to do circular motion, the follower 24 firstly does linear motion and then does reverse motion, and the follower 23 is of a double-layer closed structure, so that during the process that the transmission belt 23 continuously reciprocates along the length direction of the mounting plate 21, and drives the scraping rod 32 to reciprocate, so that gravel placed in the sieve plate 9 is scraped, and the gravel is more uniformly distributed in the sieve plate 9, thereby improving the use efficiency of sieve holes in the sieve plate 9, avoiding gravel from being stacked in a certain descending area of the sieve plate 9, and avoiding the risk of blockage of the sieve holes.

Further, when the follower 24 moves to the end of the stroke, the connection frame 26 is driven to move to the end of the stroke, the abutting wheel 30 rotatably mounted on the connection frame 26 abuts against the triangular plate 31, and under the extrusion of the triangular plate 31, the connection frame 26 is driven to move in the direction perpendicular to the moving direction of the connection frame, and at the time, the plurality of scraping rods 32 are longitudinally displaced, so that the gravel in the screen plate 9 is further scraped, and the uniformity of the gravel in the screen plate 9 is improved.

It should be noted that, with the above arrangement, it is mainly considered that there is actually a certain gap between the two scraping rods 32, when the gravel is scraped off once, the gravel is piled between the two scraping rods 32, and by driving the scraping rods 32 to move one of the scraping rods 32 to the position between the two previous scraping rods 32, the gravel piled between the two scraping rods 32 is scraped off, so that the gravel is more uniformly distributed.

Referring to fig. 1, 4 and 5, the sieve plates 9 are provided with three groups and all arranged on the base 1 in parallel, one end of each of the three groups of sieve plates 9 is connected to a connecting frame 15 arranged on the base 1, the other end of each of the three groups of sieve plates 9 is connected to a vertical rod 17, and a baffle 16 for plugging the sieve plates 9 is fixedly mounted on the vertical rod 17;

the support assembly is connected with the sieve plate 9 and the power assembly and comprises an elastic structure and a pull-down sleeve, and the elastic structure is matched with the pull-down sleeve to enable the sieve plate 9 to be kept in a horizontal or inclined state;

the elastic structure comprises a plurality of rotary sleeves 11 rotatably mounted on the bearing plate 6, telescopic rods 10 are slidably mounted in the rotary sleeves 11, and one ends of the telescopic rods 10 far away from the rotary sleeves 11 are rotatably connected with the sieve plates 9 positioned at the lower parts;

a spring 12 is further arranged in the rotating sleeve 11, one end of the spring 12 is connected with the inner wall of the rotating sleeve 11, and the other end of the spring 12 is connected with the telescopic rod 10;

the pull-down kit comprises air cylinders 13 symmetrically arranged on the bearing plate 6, pull wheels 14 are rotatably arranged on the telescopic ends of the air cylinders 13, and the pull wheels 14 are matched with the sieve plate 9 in a rolling manner.

In terms of the invention, three sets of sieve plates 9 are arranged, the sieve holes on the sieve plates 9 are gradually reduced from top to bottom in the three layers of sieve plates 9, and the sieve plates 9 on the lower layer are of plate-shaped structures, namely, no sieve holes exist, when gravel is positioned on the sieve plate 9 on the upper layer, smaller gravel falls into the sieve plate 9 on the middle layer through sieving, and the gravel in the sieve plate 9 on the middle layer is sieved again, so that the smaller gravel enters the sieve plate 9 on the bottommost layer, and multi-level sieving of the gravel is realized.

In the initial state, a parallelogram is formed among the three-layer screen plate 9, the connecting frame 15 and the vertical rod 17, and meanwhile, in the state, the spring 12 is in a compressed state and has an urging function of upwards jacking up the screen plate 9, at the moment, the screen plate 9 is kept horizontal under the action of the pull wheel 14, after screening is completed, the telescopic end of the air cylinder 13 moves downwards, the pull wheel 14 is pulled to move downwards, and the screen plate 9 is urged to deflect, and when the spring 12 is compressed, because the vertical rod 17 is always in a set state, when the screen plate 9 deflects, the baffle 16 fixedly connected with the vertical rod 17 is kept in a vertical state, so that one side of the screen plate 9 is conducted, screened gravel can flow out from one side of the screen plate 9, and through the arrangement, the difficulty of removing the gravel after screening is completed is reduced.

In summary, when the gravel screening device is used, gravel with screening is poured into the screening plate 9, and the driving device 2 is started, at this time, the output shaft of the driving device 2 drives the rotating part 3 connected with the rotating part to rotate, and the first pulley 4 connected with the rotating part 3 makes a circular motion, and the first pulley 4 slides in the embedded plate 5, so that when the first pulley 4 makes a circular motion, the first pulley reciprocates in the embedded plate 5, and drives the embedded plate 5 to drive the receiving plate 6 to reciprocate along the length direction of the first guide rod 8, so that the screening plate 9 makes a reciprocating motion, and when the screening plate 9 moves in a reverse direction after moving to the stroke end each time, gravel inside the screening plate and the screening plate 9 slide relatively due to inertia, so that the gravel falls from the screening plate 9 at a higher speed.

In the initial state, parallelogram has been formed between three-deck sieve 9 and link 15 and montant 17, simultaneously in this state, spring 12 is under the state of compressed, it has one with sieve 9 upwards jack-up to order about, at this moment under the effect of pullery 14, and make sieve 9 keep the level, after the screening is accomplished, the flexible end downstream of cylinder 13, pullery 14 downstream, and order about sieve 9 and deflect, when compressing spring 12, because montant 17 is in the setting condition all the time, when making sieve 9 deflect, baffle 16 with montant 17 fixed connection will keep vertical state, thereby make one side of sieve 9 switch on, the grit after the screening can flow out by one side of sieve 9, through the aforesaid setting, reduce the degree of difficulty that gets rid of the grit after the screening is accomplished.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A plate-type advanced sand screening machine with multilayer height distribution is characterized by comprising:

a base (1);

the screen plates (9) are provided with three groups of screen plates (9) which are all arranged on the base (1) in parallel, one ends of the three groups of screen plates (9) are connected with a connecting frame (15) arranged on the base (1), the other ends of the three groups of screen plates are connected with vertical rods (17), and baffle plates (16) used for plugging the screen plates (9) are fixedly arranged on the vertical rods (17);

the power assembly is arranged on the base (1) and connected with the sieve plate (9), and the power assembly can drive the sieve plate (9) to reciprocate along the length direction of the base (1);

the paving mechanism is installed on the base (1) and connected with the power assembly, the paving mechanism comprises a reciprocating assembly and a longitudinal offset assembly, a plurality of scraping rods (32) are arranged on the longitudinal offset assembly at equal intervals, and when the reciprocating assembly drives the longitudinal offset assembly to move to the end of a stroke, the longitudinal offset assembly can drive the scraping rods (32) to move in a direction perpendicular to the length direction of the base (1);

the supporting assembly is connected with the sieve plate (9) and the power assembly and comprises an elastic structure and a pull-down sleeve, and the elastic structure is matched with the pull-down sleeve to enable the sieve plate (9) to be kept in a horizontal or inclined state.

2. The plate-type advanced sand screening machine with the multilayer height distribution as claimed in claim 1, characterized in that the base (1) is provided with a bearing plate (6) parallel to the base, the bearing plate (6) is fixedly connected with the connecting frame (15), the bearing plate (6) is further provided with a plurality of first sliding sleeves (7), and the first sliding sleeves (7) are slidably connected with first guide rods (8) arranged on the base (1);

the power assembly comprises a driving device (2) fixedly mounted on the base (1), an output shaft of the driving device (2) penetrates through the base (1) and is connected with a rotating part (3), one end, far away from the rotating center, of the rotating part (3) is provided with a first pulley (4), and the first pulley (4) is in sliding connection with a tabling plate (5) fixed on the receiving plate (6).

3. The plate-type stepped sand screening machine with the multilayer height distribution as claimed in claim 2, wherein the reciprocating assembly comprises a mounting plate (21) fixedly mounted on the base (1), two driving wheels (22) are rotatably mounted on the mounting plate (21), and a driving belt (23) is sleeved between the two driving wheels (22);

a rotating shaft of one of the driving wheels (22) is connected with a driving rod (19) rotatably mounted on the base (1) through a second belt (20), and one end, far away from the second belt (20), of the driving rod (19) is connected with a rotating shaft of the rotating part (3) through a first belt (18);

the reciprocating assembly further comprises a fitting structure connecting the transmission belt (23) and the longitudinal offset assembly.

4. A multi-layer level-distributed plate-type advanced sand screening machine as claimed in claim 3, wherein said engaging structure comprises a second pulley (2301) rotatably mounted on said transmission belt (23) and a chute (25) opened on said longitudinal offset assembly, said second pulley (2301) being slidable in said chute (25).

5. The multilayer plate-type advanced sand screening machine with high and low distribution according to claim 4, characterized in that the longitudinal deviation component comprises two second guide rods (29) fixedly arranged on the mounting plate (21), a second sliding sleeve (28) is rotatably arranged on the second guide rods (29), a connecting rod is fixed on the second sliding sleeve (28), and a sliding block (27) is fixed at one end of the connecting rod, which is far away from the second sliding sleeve (28);

the longitudinal deviation assembly further comprises a connecting frame (26) connected with the scraping rod (32), a sliding block (27) is arranged in the connecting frame (26) in a sliding mode, a follower (24) is mounted on the connecting frame (26) in a sliding mode, and the sliding groove (25) is arranged on the follower (24);

the longitudinally offset assembly further includes an abutment structure.

6. The plate-type advanced sand screening machine with multilayer height distribution according to claim 5, characterized in that the abutting structure comprises two abutting wheels (30) which are symmetrically and rotatably installed on the connecting frame (26) and two triangular plates (31) which are diagonally arranged on the installation plate (21), and the triangular plates (31) are matched with the abutting wheels (30) and can drive the connecting frame (26) to move.

7. The plate-type advanced sand screening machine with multiple layers of heights and distributions as claimed in claim 2, wherein the elastic structure comprises a plurality of rotating sleeves (11) rotatably mounted on the bearing plate (6), telescopic rods (10) are slidably mounted in the rotating sleeves (11), and one ends of the telescopic rods (10) far away from the rotating sleeves (11) are rotatably connected with the screening plates (9) at the lower part;

still be provided with spring (12) in rotatory sleeve (11), the one end of spring (12) with the inner wall of rotatory sleeve (11) is connected, the other end with telescopic link (10) are connected.

8. The plate-type progressive sand screening machine with multilayer height distribution according to claim 7 is characterized in that the pull-down kit comprises air cylinders (13) symmetrically arranged on the bearing plate (6), a pull wheel (14) is rotatably mounted on the telescopic end of the air cylinder (13), and the pull wheel (14) is in rolling fit with the screening plate (9).