CN112222353A

CN112222353A - Sand mould filtration

Info

Publication number: CN112222353A
Application number: CN202010977239.XA
Authority: CN
Inventors: 赵远; 赵光明
Original assignee: Fanchang Qixin Casting Co ltd
Current assignee: Fanchang Qixin Casting Co ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-01-15

Abstract

The invention relates to the technical field of sand mold filtration, in particular to a sand mold filtration structure which comprises a bottom plate, a supporting device, a first filtration device, a driving device, a crushing device and a second filtration device, wherein the bottom plate is arranged on the ground, a rectangular cover is arranged on the bottom plate, rectangular holes are formed in two side walls of the rectangular cover, the supporting device is arranged at the lower half part in the rectangular cover, the first filtration device is arranged right above the supporting device and is in hinged fit with the supporting device, the driving device is arranged on the top of the bottom plate and is connected with the first filtration device, the crushing device is arranged on two inner side walls of the rectangular cover, and the second filtration device is arranged below the crushing device. According to the invention, through the mutual matching operation among the devices, the molding sand is automatically filtered without manual assistance, and large particles can be crushed and filtered without recovery treatment, so that the cost is saved, and the whole processing efficiency is improved.

Description

Sand mould filtration

Technical Field

The invention relates to the technical field of sand filtration, in particular to a sand filtration structure.

Background

With the development of modern technology, the molding sand is used as a material clinging to castings in casting production and plays an extremely important role in the casting process, casting waste products caused by poor quality of the molding sand account for about 30-50% of total casting waste products, and the particle size of the molding sand generally used in sand casting is 0.53-3.35mm, so that the molding sand casting needs to be filtered.

However, in the prior art, manual screening is generally adopted, the screening is uneven, time and labor are wasted, unqualified particles cannot be processed, and the particles can be screened after being processed by other equipment, so that the efficiency is reduced, and certain cost is increased.

Disclosure of Invention

The invention aims to provide a sand mold filtering structure, which aims to solve the technical problems that manual screening is not uniform, time and labor are wasted, unqualified particles cannot be processed, and the particles can be screened after being processed by other equipment, so that the efficiency is reduced, and certain cost is increased.

The invention provides a sand mold filtering structure which comprises a bottom plate, a supporting device, a first filtering device, a driving device, a crushing device and a second filtering device, wherein the bottom plate is arranged on the ground, a rectangular cover is arranged on the bottom plate, rectangular holes are formed in two side walls of the rectangular cover, the supporting device is arranged on the lower half portion in the rectangular cover, the first filtering device is arranged right above the supporting device and is in hinged fit with the supporting device, the driving device is arranged on the top of the bottom plate and is connected with the first filtering device, the crushing device is arranged on two inner side walls of the rectangular cover and is positioned at the tail portion of the first filtering device, and the second filtering device is arranged below the crushing device and is arranged on two inner side walls in the rectangular cover.

Further, strutting arrangement includes frame, conveying mechanism, first feed opening and four rectangular blocks, the frame sets up on the lateral wall in the rectangle cover, conveying mechanism installs in the frame, first feed opening is installed on conveying mechanism's afterbody, four rectangular block blocks respectively and establishes in the rectangular hole on the rectangle cover and four rectangular blocks are two bisymmetry respectively and install on the both sides wall of frame.

Further, the first filtering device comprises a first filtering plate, a second filtering plate, a first feed opening, a second feed opening, four square blocks and four vertical plates, the second filter plate is arranged right above the frame, the first filter plate is arranged right above the second filter plate, a plurality of filter holes are arranged on the first filter plate and the second filter plate, the diameter of the filtering holes on the first filtering plate is larger than that of the filtering holes on the second filtering plate, the four square blocks are symmetrically arranged on the two side walls of the first filtering plate in pairs, the four vertical plates are vertically arranged on the second filtering plate in pairs, and two ends of the four vertical plates are respectively hinged with the square block on the first filter plate and the rectangular block on the frame, the first material passing opening is formed in the end portion of the first filter plate, and the second material passing opening is formed in the end portion of the second material passing opening.

Further, drive arrangement includes dead lever, supporting seat, driving motor, ring and connecting rod, the dead lever is installed on the lateral wall of second filter and is run through the rectangle cover and outwards extend, the supporting seat sets up on the lateral wall of rectangle cover and installs on the bottom plate, driving motor installs on the supporting seat, ring fixed connection is on driving motor's main shaft, a pot head of connecting rod is established on the dead lever, another pot head of connecting rod is established on the ring.

Further, reducing mechanism includes rectangle frame, crushing motor, two loading boards, two crushing fluted rollers and two gears, two the loading board symmetry transversely sets up on the both sides wall in the rectangle cover, the rectangle frame sets up on two loading boards and the rectangle frame is located the below of first feed opening, two crushing fluted roller sets up respectively in the rectangle frame and the axle on two crushing fluted rollers is installed respectively on the lateral wall of rectangle frame, crushing motor sets up on a rectangle frame lateral wall, just the main shaft of crushing motor is connected with one end of the axle on one of them crushing fluted roller, two the gear is established respectively the cover and is established on the other end of two crushing fluted rollers and two gear engagement.

Further, the second filtering device comprises a third filtering plate, a bearing seat, a vibrating motor, a material receiving slideway, a third feed opening, four supporting rods and four springs, the third filtering plate is obliquely arranged in the rectangular cover and is positioned below the second feed opening, the third filtering plate is provided with a round hole, the diameter of the round hole on the third filtering plate is smaller than that of the filtering hole on the second filtering plate, one end of each of the four supporting rods is symmetrically arranged on the two side walls of the third filtering plate in pairs, the other end of each of the four supporting rods is respectively arranged in the side walls of the rectangular cover, the four springs are respectively sleeved on the outer walls of the four supporting rods, the bearing seat is arranged on the outer wall of the rectangular cover, the vibrating motor is arranged on the bearing seat, the main shaft of the vibrating motor is fixedly connected with one of the supporting rods, the material receiving slideway is arranged at the bottom of the third filtering plate, the third feed opening is arranged at the end part of the third filter plate and clamped on the side wall of the rectangular cover.

Further, be equipped with two feeder hoppers on the top of rectangle cover, two the bottom of feeder hopper runs through the top of rectangle cover and is linked together with the inside of rectangle cover, still be equipped with first collecting box, second collecting box and third collecting box on the bottom plate in proper order, just first collecting box, second collecting box and third collecting box are located first feed opening in proper order, connect the below of material slide and third feed opening.

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

firstly, the molding sand is automatically filtered through the mutual matching operation of the arranged devices without manual assistance, and large particles can be crushed and filtered without recovery treatment, so that the cost is saved, and the whole processing efficiency is improved.

Secondly, when filtering the molding sand particles, the molding sand particles are filtered by the invention only by pouring the molding sand into two feed hoppers to fall on the first filter plate, the driving motor works to drive the circular ring on the main shaft of the driving motor to rotate, then the connecting rod is driven to rotate on the circular ring, the other end of the connecting rod is sleeved on the fixed rod, so the fixed rod is driven to move, then the second filter plate is driven to move, and the two ends of the four vertical plates are respectively hinged with the square block on the first filter plate and the rectangular block on the frame, so the first filter plate and the second filter plate are driven to move, the molding sand particles on the first filter plate are filtered, when the molding sand particles are smaller than the filter holes of the first filter plate, the molding sand particles smaller than the molding sand particles on the second filter plate fall on the lower conveying mechanism, and the conveying mechanism works to drop the screened molding sand particles into the first collecting box from the first discharge hole, need not artifical auxiliary work, improved efficiency.

Thirdly, when sand mold particles on a first filter plate in the first filter device are larger than filter holes in the first filter plate, the sand mold particles fall into the crushing device from the first material passing port, the crushing motor works to drive the crushing gear rollers connected with a main shaft of the crushing motor to rotate, and because the other ends of the two crushing gear rollers are provided with two meshing gears, the other crushing gear rollers can be driven to move relatively, the sand mold particles are crushed, the subsequent filtering is convenient, the recovery processing is not needed, the cost is saved, the problem that the particles can not be processed and processed by other equipment in the prior art, the particles can be screened again after being processed and processed by other equipment is avoided, the efficiency is reduced, and certain cost is increased.

Fourthly, when the sand mold is filtered by the first filtering device and falls onto the second filtering device, the vibration motor drives the support rod on the main shaft of the vibration motor to vibrate, so that the third filtering plate is driven to vibrate, molding sand on the third filtering plate is screened in a vibrating mode, the molding sand larger than the round hole in the third filtering plate falls into the third collecting box from the third feed opening, and when the molding sand smaller than the round hole in the third filtering plate falls into the second collecting box from the material receiving slide or directly, molding sand particles with different sizes are automatically filtered, and the filtering effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

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

FIG. 2 is a schematic perspective view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a perspective cross-sectional view of the present invention;

FIG. 5 is an enlarged view taken at A in FIG. 4;

FIG. 6 is a partial perspective view of the present invention;

fig. 7 is a schematic perspective view of the crushing apparatus and the second filtering apparatus according to the present invention.

Reference numerals:

the device comprises a bottom plate 1, a rectangular cover 10, a rectangular hole 11, a feed hopper 12, a first collecting box 13, a second collecting box 14, a third collecting box 15, a supporting device 2, a frame 20, a conveying mechanism 21, a first discharging opening 22, a rectangular block 23, a first filtering device 3, a first filtering plate 30, a second filtering plate 31, a first discharging opening 32, a second discharging opening 33, a square block 34, a vertical plate 35, a driving device 4, a fixing rod 40, a supporting seat 41, a driving motor 42, a circular ring 43, a connecting rod 44, a crushing device 5, a rectangular frame 50, a crushing motor 51, a bearing plate 52, a crushing tooth roller 53, a gear 54, a second filtering device 6, a third filtering plate 60, a bearing seat 61, a vibrating motor 62, a material receiving slide 63, a third discharging opening 64, a supporting rod 65 and a spring 66.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

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 the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 7, an embodiment of the present invention provides a sand mold filtering structure, which includes a bottom plate 1, a supporting device 2, a first filtering device 3, a driving device 4, a crushing device 5, and a second filtering device 6, wherein the bottom plate 1 is disposed on the ground, a rectangular cover 10 is disposed on the bottom plate 1, rectangular holes 11 are disposed on two side walls of the rectangular cover 10, the supporting device 2 is disposed on a lower half portion of the rectangular cover 10, the first filtering device 3 is disposed right above the supporting device 2, the first filtering device 3 is in hinged fit with the supporting device 2, the driving device 4 is mounted on the top of the bottom plate 1, the driving device 4 is connected with the first filtering device 3, the crushing device 5 is mounted on two inner side walls of the rectangular cover 10 and located at a tail portion of the first filtering device 3, the second filtering device 6 is disposed below the crushing device 5 and mounted on two inner side walls of the rectangular cover 10, the filter effect to the molding sand granule has been improved through the first filter equipment 3 and the second filter equipment 6 that set up to improved efficiency, the effect that sets up reducing mechanism 5 filters after smashing the molding sand granule that can not filter, need not recovery processing, saves the cost, has improved whole machining efficiency.

Specifically, strutting arrangement 2 includes frame 20, conveying mechanism 21, first feed opening 22 and four rectangular blocks 23, frame 20 sets up on the lateral wall in rectangle cover 10, conveying mechanism 21 installs in frame 20, first feed opening 22 is installed on conveying mechanism 21's afterbody, four rectangular blocks 23 block respectively establish in rectangular hole 11 on rectangle cover 10 and four rectangular blocks 23 are two bisymmetry respectively and install on frame 20's both sides wall, and the effect that sets up conveying mechanism 21 carries the molding sand granule that filters.

Specifically, the first filtering device 3 comprises a first filtering plate 30, a second filtering plate 31, a first material passing port 32, a second material passing port 33, four square blocks 34 and four vertical plates 35, the second filtering plate 31 is arranged right above the frame 20, the first filtering plate 30 is arranged right above the second filtering plate 31, a plurality of filtering holes are arranged on the first filtering plate 30 and the second filtering plate 31, the diameter of the filtering hole on the first filtering plate 30 is larger than that of the filtering hole on the second filtering plate 31, the four square blocks 34 are symmetrically arranged on two side walls of the first filtering plate 30, the four vertical plates 35 are vertically arranged on the second filtering plate 31, two ends of the four vertical plates 35 are hinged with the square blocks 34 on the first filtering plate 30 and the square blocks 23 on the frame 20 respectively, the first material passing port 32 is arranged at the end part of the first filtering plate 30, the second material passing opening 33 is provided at an end of the second material passing opening 33.

Specifically, the driving device 4 includes a fixing rod 40, a supporting seat 41, a driving motor 42, a circular ring 43 and a connecting rod 44, the fixing rod 40 is installed on the side wall of the second filter plate 31 and extends outwards through the rectangular cover 10, the supporting seat 41 is disposed on the outer side wall of the rectangular cover 10 and is installed on the bottom plate 1, the driving motor 42 is installed on the supporting seat 41, the circular ring 43 is fixedly connected to the main shaft of the driving motor 42, one end of the connecting rod 44 is sleeved on the fixing rod 40, the other end of the connecting rod 44 is sleeved on the circular ring 43, when filtering the molding sand particles, the molding sand is poured into the two feeding hoppers 12 and falls onto the first filter plate 30, the driving motor 42 drives the circular ring 43 on the main shaft of the driving motor 42 to rotate, the connecting rod 44 is driven to rotate on the circular ring 43, because the other end of the connecting rod 44 is sleeved, so can drive the motion of dead lever 40, then can drive the motion of second filter 31, again because four the both ends of riser 35 are equallyd divide and are do not articulated mutually with square piece 34 on the first filter 30 and the rectangular block 23 on the frame 20, so can drive the motion of first filter 30 and second filter 31, filter the molding sand granule on the first filter 30, need not the manual work, have improved filtration efficiency.

Specifically, the crushing device 5 comprises a rectangular frame 50, a crushing motor 51, two carrying plates 52, two crushing teeth rollers 53 and two gears 54, wherein the two carrying plates 52 are symmetrically and transversely arranged on two side walls in the rectangular cover 10, the rectangular frame 50 is arranged on the two carrying plates 52, the rectangular frame 50 is positioned below the first material passing port 32, the two crushing teeth rollers 53 are respectively arranged in the rectangular frame 50, shafts on the two crushing teeth rollers 53 are respectively arranged on the side walls of the rectangular frame 50, the crushing motor 51 is arranged on one outer side wall of the rectangular frame 50, a main shaft of the crushing motor 51 is connected with one end of the shaft on one crushing teeth roller 53, the two gears 54 are respectively sleeved on the other ends of the two crushing teeth rollers 53 and meshed with the two gears 54, when sand mold particles on the first filter plate 30 in the first filter device 3 are larger than the filter holes on the first filter plate 30, in the sand mould granule falls reducing mechanism 5 from first material passing mouth 32, the crushing fluted roller 53 that crushing motor 51 work drive and crushing motor 51 main shaft is connected rotates, again because two crushing fluted roller 53 other ends are equipped with two meshing gear 54, so can drive another crushing fluted roller 53 relative motion, smash the molding sand granule, make things convenient for follow-up filtration, need not recovery processing, save the cost, when meetting unqualified granule and can not carry out the processing and handle among the prior art, must process the granule through other equipment and can filter after handling, not only lead to the efficiency to descend, and the problem of certain cost has still been increased.

Specifically, the second filtering device 6 includes a third filtering plate 60, a carrying seat 61, a vibrating motor 62, a material receiving slideway 63, a third feed opening 64, four supporting rods 65 and four springs 66, the third filtering plate 60 is obliquely arranged in the rectangular cover 10 and is located below the second feed opening 33, the third filtering plate 60 is provided with a round hole, the diameter of the round hole on the third filtering plate 60 is smaller than that of the filtering hole on the second filtering plate 31, one end of each of the four supporting rods 65 is respectively arranged on two side walls of the third filtering plate 60 in a pairwise symmetry manner, the other end of each of the four supporting rods 65 is respectively arranged in the side wall of the rectangular cover 10, the four springs 66 are respectively sleeved on the outer walls of the four supporting rods 65, the carrying seat 61 is arranged on the outer wall of the rectangular cover 10, the vibrating motor 62 is arranged on the carrying seat 61, and the main shaft of the vibrating motor 62 is fixedly connected with one of the supporting rods 65, connect the material slide 63 to install in the bottom of third filter 60, third feed opening 64 sets up at the tip of third filter 60 and the card is established on the lateral wall of rectangle cover 10, on the sand mould had filtered through first filter equipment 3 and had left the second filter equipment 6 that can not filter, vibrating motor 62 work drive with vibrating motor 62 main epaxial bracing piece 65 vibration, thereby drive third filter 60 vibration, with the molding sand vibration screening on the third filter 60, be greater than the round hole on the third filter 60 and fall to third collecting box 15 from third feed opening 64 in, can from connecing material slide 63 or directly falling to second collecting box 14 when being less than the round hole on third filter 60.

Specifically, be equipped with two feeder hoppers 12 on the top of rectangle cover 10, two the bottom of feeder hopper 12 runs through the top of rectangle cover 10 and is linked together with the inside of rectangle cover 10, still be equipped with first collecting box 13, second collecting box 14 and third collecting box 15 on the bottom plate 1 in proper order, just first collecting box 13, second collecting box 14 and third collecting box 15 are located the below of first feed opening 22, connect material slide 63 and third feed opening 64 in proper order, set up the sand mould granule that three collecting boxes have made things convenient for the different size granules of collecting box.

The working principle of the invention is as follows: when filtering the molding sand, firstly, pouring the molding sand into two feeding hoppers 12 and dropping on the first filter plate 30, driving the driving motor 42 to drive the ring 43 on the main shaft of the driving motor 42 to rotate, then driving the connecting rod 44 to rotate on the ring 43, because the other end of the connecting rod 44 is sleeved on the fixing rod 40, driving the fixing rod 40 to move, then driving the second filter plate 31 to move, because the two ends of the four vertical plates 35 are hinged with the square blocks 34 on the first filter plate 30 and the rectangular blocks 23 on the frame 20, so as to drive the first filter plate 30 and the second filter plate 31 to move, filtering and screening the molding sand particles on the first filter plate 30, when the molding sand particles are smaller than the filtering holes of the first filter plate 30 and drop on the second filter plate 31 for secondary screening, the molding sand particles smaller than the molding sand on the second filter plate 31 and drop on the lower conveying mechanism 21, the conveying mechanism 21 works to drop the screened sand particles into the first collecting box 13 from the first discharging opening 22; when the molding sand particles are smaller than the filtering holes of the first filtering plate 30 and fall onto the second filtering plate 31 for secondary screening, the molding sand particles larger than the molding sand particles on the second filtering plate 31 fall from the second material passing hole 33 to the third filtering plate 60 for filtering, and then fall into the third collecting box 15 through the third material discharging hole 64; when the sand mold particles on the first filter plate 30 are larger than the filter holes on the first filter plate 30, the sand mold particles fall into the crushing device 5 from the first material passing hole 32, the crushing motor 51 works to drive the crushing tooth rollers 53 connected with the main shaft of the crushing motor 51 to rotate, and because the other ends of the two crushing tooth rollers 53 are provided with the two meshing gears 54, the other crushing tooth roller 53 is driven to move relatively to crush the sand mold particles, and the crushed sand mold particles fall onto the third filter plate 60, the vibration motor 62 works to drive the support rod 65 on the main shaft of the vibration motor 62 to vibrate, so as to drive the third filter plate 60 to vibrate, so as to screen the molding sand on the third filter plate 60 in a vibration mode, the sand mold particles larger than the round holes on the third filter plate 60 fall into the third collection box 15 from the third material discharging hole 64, and when the sand mold particles smaller than the round holes on the third filter plate 60 fall into, the filtering and screening efficiency is high, manual assistance is not needed, the grinding device 5 can directly grind and filter the sand particles which cannot be filtered without recovery, the problem that the efficiency is reduced, certain cost is increased, and the production efficiency is improved because the prior art can not directly process the sand particles through other equipment and then screen the particles is solved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand mold filtering structure is characterized by comprising a bottom plate (1), a supporting device (2), a first filtering device (3), a driving device (4), a crushing device (5) and a second filtering device (6), wherein the bottom plate (1) is arranged on the ground, a rectangular cover (10) is arranged on the bottom plate (1), rectangular holes (11) are formed in two side walls of the rectangular cover (10), the supporting device (2) is arranged on the lower half portion in the rectangular cover (10), the first filtering device (3) is arranged right above the supporting device (2), the first filtering device (3) is hinged and matched with the supporting device (2), the driving device (4) is arranged on the top of the bottom plate (1), the driving device (4) is connected with the first filtering device (3), the crushing device (5) is arranged on two inner side walls of the rectangular cover (10) and is located at the tail portion of the first filtering device (3), the second filtering device (6) is arranged below the crushing device (5) and is arranged on two inner side walls in the rectangular cover (10).

2. A sand filtration structure according to claim 1, characterized in that: support arrangement (2) include frame (20), conveying mechanism (21), first feed opening (22) and four rectangular block (23), frame (20) set up on the lateral wall in rectangle cover (10), conveying mechanism (21) are installed in frame (20), first feed opening (22) are installed on the afterbody of conveying mechanism (21), four rectangular block (23) block respectively establish in rectangular hole (11) on rectangle cover (10) and four rectangular block (23) two bisymmetry respectively install on the both sides wall of frame (20).

3. A sand filtration structure according to claim 2, wherein: first filter equipment (3) include first filter (30), second filter (31), first material passing mouth (32), second material passing mouth (33), four square pieces (34) and four riser (35), second filter (31) set up directly over frame (20), first filter (30) set up directly over second filter (31), all be equipped with on first filter (30) and second filter (31) if cross the filtration pore, just the diameter of crossing the filtration pore on first filter (30) is greater than the diameter of crossing the filtration pore on second filter (31), four two bisymmetry settings of square piece (34) are on the both sides wall of first filter (30), four two bisymmetry of riser (35) are vertical and install on second filter (31), and four the both ends of riser (35) are equallyd divide rectangle piece (23) on square piece (34) and frame (20) on with first filter (30) respectively The first material passing opening (32) is arranged at the end part of the first filter plate (30), and the second material passing opening (33) is arranged at the end part of the second material passing opening (33).

4. A sand filtration structure according to claim 3, wherein: drive arrangement (4) include dead lever (40), supporting seat (41), driving motor (42), ring (43) and connecting rod (44), dead lever (40) are installed on the lateral wall of second filter (31) and are run through rectangle cover (10) and outwards extend, supporting seat (41) set up on the lateral wall of rectangle cover (10) and install on bottom plate (1), driving motor (42) are installed on supporting seat (41), ring (43) fixed connection is on the main shaft of driving motor (42), a pot head of connecting rod (44) is established on dead lever (40), the other pot head of connecting rod (44) is established on ring (43).

5. A sand filtration structure according to claim 3, wherein: the crushing device (5) comprises a rectangular frame (50), a crushing motor (51), two bearing plates (52), two crushing tooth rollers (53) and two gears (54), wherein the two bearing plates (52) are symmetrically and transversely arranged on two side walls in the rectangular cover (10), the rectangular frame (50) is arranged on the two bearing plates (52), the rectangular frame (50) is positioned below the first material passing port (32), the two crushing tooth rollers (53) are respectively arranged in the rectangular frame (50), shafts on the two crushing tooth rollers (53) are respectively arranged on the side wall of the rectangular frame (50), the crushing motor (51) is arranged on one outer side wall of the rectangular frame (50), and the main shaft of the crushing motor (51) is connected with one end of the shaft on one of the crushing tooth rollers (53), the two gears (54) are respectively sleeved on the other ends of the two crushing tooth rollers (53) and the two gears (54) are meshed.

6. A sand filtration structure according to claim 3, wherein: the second filtering device (6) comprises a third filtering plate (60), a bearing seat (61), a vibrating motor (62), a material receiving slide way (63), a third feed opening (64), four supporting rods (65) and four springs (66), wherein the third filtering plate (60) is obliquely arranged in the rectangular cover (10) and is positioned below the second feed opening (33), a round hole is formed in the third filtering plate (60), the diameter of the round hole formed in the third filtering plate (60) is smaller than that of the filtering hole formed in the second filtering plate (31), one end of each of the four supporting rods (65) is respectively arranged on two side walls of the third filtering plate (60) in a pairwise symmetry manner, the other ends of the four supporting rods (65) are respectively arranged in the side walls of the rectangular cover (10), the four springs (66) are respectively sleeved on the outer walls of the four supporting rods (65), the bearing seat (61) is arranged on the outer wall of the rectangular cover (10), the vibration motor (62) is arranged on the bearing seat (61), a main shaft of the vibration motor (62) is fixedly connected with one support rod (65), the material receiving slide way (63) is arranged at the bottom of the third filter plate (60), and the third feed opening (64) is arranged at the end part of the third filter plate (60) and clamped on the side wall of the rectangular cover (10).

7. A sand filtration structure according to claim 6, wherein: be equipped with two feeder hoppers (12) on the top of rectangle cover (10), two the top that rectangle cover (10) was run through to the bottom of feeder hopper (12) is linked together with the inside of rectangle cover (10), still be equipped with first collecting box (13), second collecting box (14) and third collecting box (15) on bottom plate (1) in proper order, just first collecting box (13), second collecting box (14) and third collecting box (15) are located first feed opening (22), are connect the below of material slide (63) and third feed opening (64) in proper order.