CN113304998B

CN113304998B - Mining vibrating screen

Info

Publication number: CN113304998B
Application number: CN202110860575.0A
Authority: CN
Inventors: 闫长柏
Original assignee: Xuzhou Huachao Mine Equipment Co ltd
Current assignee: Xuzhou Huachao Mine Equipment Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2021-10-08
Anticipated expiration: 2041-07-29
Also published as: CN113304998A

Abstract

The invention relates to the technical field of mining machinery, and particularly provides a mining vibrating screen which comprises an elastic supporting seat, a vibrating box mechanism, a bearing frame mechanism, a movable screen assembly and a fixed screen assembly, wherein the vibrating box mechanism, the bearing frame mechanism, the movable screen assembly and the fixed screen assembly are fixed on the elastic supporting seat; the vibrating box mechanism comprises a vibrating box fixed on the elastic supporting seat and two vibrating motors which are assembled on the top of the vibrating box in parallel and used for providing a vibration source; the movable screen assembly and the fixed screen assembly are both assembled on the bearing frame mechanism; according to the mining vibrating screen, the screen structure of the existing vibrating screen is improved, so that the functions of actively clearing and reducing blockage can be realized when various conditions possibly causing screen hole blockage are met in the actual screening operation process, and the screening effect and screening efficiency reduction caused by screen hole blockage and the negative effects of screen blockage and damage can be actively weakened to a certain extent.

Description

Mining vibrating screen

Technical Field

The invention relates to the technical field of mining machinery, and particularly provides a mining vibrating screen.

Background

The mining vibrating screen is classified into a high-efficiency heavy screen, a self-centering vibrating screen, an elliptical vibrating screen, a dewatering screen, a circular vibrating screen, a banana screen, a linear vibrating screen and the like; the invention provides a mining vibrating screen, in particular to a linear mining vibrating screen, which mainly depends on two same vibrating motors to synchronously rotate in opposite directions, so that the whole screen machine is driven to do linear motion to realize the screening function.

The screen is an important part of the vibrating screen, whether the vibrating screen is a mining vibrating screen or any other type of vibrating screen, and the correct selection and use of the screen directly determine the grading and quality of products. When the screen is used, materials are frequently blocked in screen holes, so that the problem that the screening effect and the screening efficiency are greatly reduced due to the blocking of the screen is caused, even the screen is deformed and damaged due to the blocking and accumulation of the materials, particularly in the field of mining screening, the problem that the randomness and the diversity of the structural shape of mineral materials are obvious, and a large amount of silt is often adhered to ores, so that the situation of screen blocking can occur at a high probability during the actual screening operation; the causes of clogging of the screen during actual operation are various, and several cases that can cause clogging of the screen are described in detail below: (1) the materials to be screened contain a large amount of critical materials close to the separation point, namely the granularity of crushed stones is critical to the mesh size of the screen, and the grains are blocked in the mesh and cannot be smoothly screened in the screening process of the stones, so that the holes are blocked, namely the critical holes are blocked.

(2) The material with the shape of a plurality of contact points for the sieve holes is more.

(3) The sheet structure has more materials. Due to the fact that the stone materials are broken or broken, the number of the flaky materials in the stone materials is large, the flaky materials cannot be smoothly sieved in the sieving process, and meanwhile the flaky materials are interwoven into a net shape, so that the sieving of other materials is prevented from causing hole blockage.

(4) The screened material has high water content and contains viscous substances such as silt and the like. As the stones contain much mud or the stones require water washing, fine-particle stones are bonded into clusters due to the intervention of water, on one hand, the stones are bonded with each other, and on the other hand, the mud is bonded on the screen surface, so that the materials are difficult to screen, and the holes are blocked.

Four above the condition be the leading cause that arouses the screen cloth and block up that faces when actual screening, all can be the condition that can meet unavoidably mostly, but the screen cloth structure of current mining shale shaker is fixed knot basically, consequently causes the jam of sieve mesh more easily when meetting above-mentioned problem, and can't reduce the screening effect and the screening efficiency reduction and the screen cloth of blockking up and the negative effects of damage that cause because of the sieve mesh jam when initiatively weakening the screening to a certain extent.

Disclosure of Invention

In order to solve the problems, the invention provides a mining vibrating screen which is used for solving the problems mentioned in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a mining vibrating screen comprises an elastic supporting seat, a vibrating box mechanism, a bearing frame mechanism, a movable screen assembly and a fixed screen assembly, wherein the vibrating box mechanism, the bearing frame mechanism, the movable screen assembly and the fixed screen assembly are fixed on the elastic supporting seat; the vibrating box mechanism comprises a vibrating box fixed on the elastic supporting seat and two vibrating motors which are assembled on the top of the vibrating box in parallel and used for providing a vibration source; the bearing frame mechanism is assembled in the vibration box, and the movable sieve component and the fixed sieve component are assembled on the bearing frame mechanism.

The bearing frame mechanism comprises two driving boxes which are arranged oppositely in a mirror image mode, the two driving boxes are fixed on two inner side walls at opposite positions in the vibration box in a one-to-one correspondence mode, a rectangular bearing frame is assembled between the two driving boxes in a sliding mode, a plurality of rectangular frame holes are distributed in the bearing frame in a matrix arrangement mode, and a separation driving assembly is assembled on each driving box; two relative frame limit positions evenly are provided with three ear piece and three ear piece respectively on the bearing frame and run through the slip setting at the homonymy on the drive box, the bearing frame is two sets of through both sides position the ear piece bearing is placed two between the separation drive assembly.

The movable screen assembly is positioned between the two driving boxes and comprises two movable screen walls which are adjacently arranged in a one-to-one correspondence way with the two driving boxes, a plurality of movable screen bars which are uniformly arranged are fixedly connected between the two movable screen walls, the movable screen bars are distributed above the bearing frame in an aligned way, a sliding shaft is arranged below each movable screen wall, the sliding shaft penetrates through and is arranged on the three ear blocks at the adjacent positions in a sliding manner, the bottom ends of the two movable sieve uppers are respectively provided with two fixed blocks, the sliding shaft positioned below the fixed blocks is fixed on the movable sieve uppers, the fixed blocks are distributed between the two adjacent ear blocks, reset springs are sleeved on the sliding shaft and positioned on two sides of the two fixed blocks, and two ends of each reset spring are fixed on the fixed blocks and the lug blocks respectively; one end of the sliding shaft is hinged with a pull rod, and the other end of the pull rod is hinged on the elastic supporting seat.

The fixed screen assembly comprises two fixed screen walls fixedly connected between the two driving boxes, a plurality of uniformly arranged fixed screen bars are fixedly connected between the two fixed screen walls, the fixed screen bars are arranged above the movable screen bars in an arrangement mode, and the fixed screen bars and the movable screen bars are arranged perpendicularly.

The two separation driving components can drive the bearing frame to slide between the two driving boxes in the direction away from the whole row of the movable sieve bars.

Preferably, the driving box comprises a rectangular guide side plate and end plates vertically fixed at two ends of the guide side plate respectively, and the two end plates are fixed on the inner side wall of the vibration box; the separation driving assembly comprises an electric push rod fixed on the outer side wall of one end plate, a spline shaft fixedly connected to the output end of the electric push rod, three driving wedges fixed on the spline shaft and two guide blocks in sliding guide fit with the spline shaft; three guide holes are formed in the guide side plate and correspond to the three ear blocks on the same side of the bearing frame one by one, and the ear blocks are arranged on the guide holes in a penetrating and sliding mode; the two guide blocks are fixed on the guide side plates and face the side walls of the inner side walls of the vibration box, the three end portions, extending out of the guide holes, of the lug blocks are respectively provided with driven wedge blocks, the three driving wedge blocks are arranged below the three driven wedge blocks in a one-to-one corresponding matching mode, and the inclined surfaces of the driving wedge blocks are in contact with the inclined surfaces of the driven wedge blocks which are arranged oppositely.

Preferably, the elastic supporting seat comprises a rectangular frame-shaped base, two supporting beams are arranged on the frame-shaped base in parallel, a first spring and a second spring are vertically and fixedly arranged at the top end of each supporting beam, the length of the first spring is greater than that of the second spring, and connecting seats are arranged at the top end of each first spring and the top end of each second spring; the vibration box is fixedly arranged on the four connecting seats; the other end of the pull rod is hinged on the frame-shaped base.

Preferably, the vibration box comprises two parallel supporting side plates and a fixed beam plate which is fixedly connected between the tops of the two supporting side plates and is obliquely arranged, and the two vibration motors are fixedly arranged on the fixed beam plate; the two supporting side plates are correspondingly fixed on the two groups of connecting seats above the two supporting beams one by one; and the two driving boxes are fixedly arranged on the inner side walls of the two supporting side plates in a one-to-one correspondence manner.

Preferably, the drive box is still including sealing the slide, the end board is the right trapezoid structure, end board fixed connection be in support on the curb plate inside wall, seal slide fixed mounting by direction curb plate, support curb plate and two on the open-top that the end board encloses, just seal the slide follow support the curb plate to the direction curb plate is slope setting downwards.

Preferably, a feeding baffle is fixedly connected between the vertical side ends of the two supporting side plates.

The technical scheme has the following advantages or beneficial effects: 1. according to the invention, through improving the design of the screen structure of the existing vibrating screen, the functions of actively clearing blockage and reducing blockage can be realized when various conditions possibly causing screen hole blockage are met in the actual screening operation process, and the screening effect and screening efficiency reduction caused by screen hole blockage and the negative effects of screen blockage and damage can be actively weakened to a certain extent.

2. The invention provides a mining vibrating screen, wherein the existing fixed screen structure is replaced by a combined structure formed by a movable screen component and a fixed screen component, an entire row of movable screen bars and fixed screen bars which are vertically arranged are combined to form a screen part, the entire row of movable screen bars can reciprocate left and right relative to the fixed screen bars when screening is carried out, the sizes of screen holes at any moment are kept consistent, the effects of actively cleaning and reducing blockage can be achieved on the basis of ensuring the normal screening function, the good screening effect and the higher screening efficiency can be maintained in the long-time screening operation process, and the damage of the screen structure caused by the blockage can be avoided to a great extent.

3. According to the supporting frame mechanism provided by the invention, on one hand, the supporting frame can be used as a supporting lining plate for supporting the lower part of the screen formed by combining the movable screen bars and the fixed screen bars, so that the screen is prevented from deforming and losing efficacy, and on the other hand, the separation function of the movable screen bars and the fixed screen bars can be rapidly realized, so that after one round of screening operation is completed, the residual crushed ore and silt blocked in the screen holes can be timely and rapidly cleaned and separated, and the subsequent screening operation can be ensured.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings, in which like numerals refer to like parts throughout the several views and which are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic perspective view of a mining vibrating screen provided by the invention at one viewing angle.

Fig. 2 is a schematic perspective view of a mining vibrating screen provided by the invention at another view angle.

Fig. 3 is a schematic perspective view of the elastic support seat.

Fig. 4 is a schematic perspective view of the vibration box mechanism.

Figure 5 is a perspective view of an assembly of the support frame mechanism, movable screen assembly and fixed screen assembly from one perspective.

Fig. 6 is a partially enlarged schematic view at a in fig. 5.

Figure 7 is a perspective view of an assembly of the support frame mechanism, movable screen assembly and fixed screen assembly from another perspective.

Fig. 8 is a partially enlarged schematic view at B in fig. 7.

Figure 9 is a bottom view of the assembled structure of the support frame mechanism, the movable screen assembly and the fixed screen assembly.

In the figure: 1. an elastic supporting seat; 11. a frame-shaped base; 111. a support beam; 12. a first spring; 13. a second spring; 14. a connecting seat; 2. a vibration box mechanism; 21. a vibration box; 211. supporting the side plates; 212. fixing the beam plate; 213. a feed baffle; 22. a vibration motor; 3. a support frame mechanism; 31. a drive box; 311. a guide side plate; 3111. a guide hole; 312. an end plate; 313. sealing the sliding plate; 32. a bearing frame; 321. an ear piece; 322. a driven wedge block; 33. separating the drive assembly; 331. an electric push rod; 332. a spline shaft; 333. driving a wedge block; 334. a guide block; 4. a movable screen assembly; 41. a movable sieve side; 42. a movable screen bar; 43. a sliding shaft; 44. a fixed block; 45. a return spring; 46. a pull rod; 5. securing the screen assembly; 51. fixing the sieve side; 52. and (5) fixing the screen bars.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for the purpose of providing those skilled in the art with a more complete, accurate and thorough understanding of the concept and technical solution of the present invention, and to facilitate the implementation thereof, but not to limit the present invention.

As shown in fig. 1 and 2, the mining vibrating screen comprises an elastic supporting seat 1, a vibrating box mechanism 2 fixed on the elastic supporting seat 1, a bearing frame mechanism 3, a movable screen assembly 4 and a fixed screen assembly 5.

As shown in fig. 3, the elastic support seat 1 includes a rectangular frame-shaped base 11, two support beams 111 are arranged on the frame-shaped base 11 in parallel, a first spring 12 and a second spring 13 are vertically welded on the top end of each support beam 111, the length of the first spring 12 is greater than that of the second spring 13, and a connection seat 14 is welded on the top end of each first spring 12 and the top end of each second spring 13.

As shown in fig. 4, the vibration box mechanism 2 comprises a vibration box 21 fixed on the elastic support base 1 and two vibration motors 22 mounted on top of the vibration box 21 in parallel for providing a vibration source; the vibration box 21 comprises two parallel supporting side plates 211 and a fixed beam plate 212 welded between the tops of the two supporting side plates 211 and obliquely arranged, the two vibration motors 22 are fixedly installed on the fixed beam plate 212 through bolts, and the two supporting side plates 211 are fixedly installed on the two groups of connecting seats 14 above the two supporting beams 111 through bolts in a one-to-one correspondence manner; a feeding baffle 213 is welded between the vertical side ends of the two supporting side plates 211. To facilitate the blanking, the screen formed by the combination of the movable screen bars 42 and the fixed screen bars 52 is disposed obliquely, and the feeding baffle 213 is located near the highest side of the screen.

As shown in fig. 5, 6, 7, 8 and 9, the supporting frame mechanism 3 is mounted in the vibration box 21; the supporting frame mechanism 3 comprises two driving boxes 31 which are arranged oppositely in a mirror image manner, the two driving boxes 31 are correspondingly fixed on two inner side walls at opposite positions in the vibration box 21 one by one, a rectangular supporting frame 32 is assembled between the two driving boxes 31 in a sliding manner, a plurality of rectangular frame holes are distributed on the supporting frame 32 in a matrix arrangement manner, and each driving box 31 is assembled with a separation driving assembly 33; three lug blocks 321 are respectively and uniformly arranged at two opposite frame edge positions on the bearing frame 32, the three lug blocks 321 are arranged on the drive box 31 at the same side in a penetrating and sliding manner, and the bearing frame 32 is supported and placed between the two separated drive components 33 through two groups of lug blocks 321 at two side positions; the two separation driving assemblies 33 can drive the bearing frame 32 to slide between the two driving boxes 31 in a direction away from the whole row of movable screen bars 42; the two driving boxes 31 are welded on the inner side walls of the two supporting side plates 211 in a one-to-one correspondence manner; the driving box 31 comprises a rectangular guide side plate 311 and end plates 312 vertically welded at two ends of the guide side plate 311, and the two end plates 312 are fixed on the inner side wall of the support side plate 211; the separation driving assembly 33 comprises an electric push rod 331 fixed on the outer side wall of one of the end plates 312 through screws, a spline shaft 332 fixedly connected to the output end of the electric push rod 331, three driving wedges 333 which are sleeved and fixed on the spline shaft 332 through screws, and two guiding blocks 334 which are in sliding guiding fit with the spline shaft 332 (the guiding blocks 334 can be used for fast guiding assembly of the spline shaft 332, and can indirectly enhance the supporting effect on the supporting frame 32 through enhancing the support on the spline shaft 332); the guide side plate 311 is provided with three guide holes 3111, the three guide holes 3111 correspond to the three ear pieces 321 on the same side of the support frame 32 one by one, and the ear pieces 321 are arranged on the guide holes 3111 in a penetrating and sliding manner; the two guide blocks 334 are fixed on the guide side plate 311 by bolts and face the side wall of the inner side wall of the vibration box 21, the driven wedges 322 are respectively arranged at one ends of the three lugs 321 extending out of the guide holes 3111, the three driving wedges 333 are correspondingly arranged below the three driven wedges 322 one by one, and the inclined surfaces of the driving wedges 333 are in contact with the inclined surfaces of the driven wedges 322 arranged oppositely.

In the supporting frame mechanism 3, the whole supporting frame 32 is supported by two separating driving assemblies 33, and in the whole screening process, the supporting frame 32 is always at the highest position, in the high position state, the whole row of movable screen bars 42 and the whole row of fixed screen bars 52 which are positioned above the supporting frame 32 are basically in a close contact state, so that the movable screen bars 42 and the fixed screen bars 52 are combined to form a screen for screening, the screen hole of the screen is formed by a rectangular area enclosed by two adjacent movable screen bars 42 and two adjacent fixed screen bars 52, and ore materials are screened through the screen when in screening; in addition, after completing a round of screening operation, the two separation driving assemblies 33 can be matched to make the bearing frame 32 slide between the two guide side plates 311 in a direction away from the entire row of fixed screen bars 52, that is, the height of the bearing frame 32 is reduced to make the entire row of movable screen bars 42 (the movable screen assembly 4 is assembled on the bearing frame 32, so the whole movable screen assembly 4 can move synchronously with the bearing frame 32) separate from the fixed screen bars 52, in a specific operation, as shown in fig. 5 and 6, the two separation driving assemblies 33 are synchronously started, when the output end of the electric push rod 331 extends, the sliding shaft 43 is pushed to slide forwards to drive the three driving wedges 333 to move forwards, the three driven wedges 322 synchronously descend along with the movement of the three driving wedges 333, and then the entire bearing frame 32 gradually leaves away from the entire row of fixed screen bars 52, so as to realize the separation effect of the movable screen bars 42 and the fixed screen bars 52, the aim at of its separation, after accomplishing a round of screening operation, the shale shaker stops the screening, can remain the part on the screen cloth and mix with the crushed ore and silt on the sieve mesh, clears up the crushed ore and the silt that mix with through quick separation this moment to the screening operation of the next round of being convenient for is used, guarantees the efficiency of screening.

In addition, the support frame 32 is located below the entire screen, thus serving as a support liner and preventing the screen from deforming and causing failure during the entire screening operation.

As shown in fig. 6, the driving box 31 further includes a sealing sliding plate 313, the end plate 312 has a right trapezoid structure, the end plate 312 is welded on the inner side wall of the supporting side plate 211, the sealing sliding plate 313 is welded on the top opening enclosed by the guiding side plate 311, the supporting side plate 211 and the two end plates 312, and the sealing sliding plate 313 is disposed obliquely downward from the supporting side plate 211 to the guiding side plate 311. The closure slide 313 provides a closed top structure for the drive housing 31 and a sloped structure for guiding material scattered over the drive housing 31 during screening.

As shown in figures 7, 8 and 9, the movable screen assembly 4 is mounted on the supporting frame mechanism 3; the movable screen assembly 4 is positioned between the two driving boxes 31, the movable screen assembly 4 comprises two movable screen sides 41 which are arranged adjacent to the two driving boxes 31 in a one-to-one correspondence manner, a plurality of movable screen bars 42 which are uniformly arranged are welded between the two movable screen sides 41, the whole row of movable screen bars 42 are distributed above the supporting frame 32, a sliding shaft 43 is arranged below each movable screen side 41, the sliding shaft 43 penetrates through three lug blocks 321 which are arranged at adjacent positions in a sliding manner, two fixed blocks 44 are respectively arranged at the bottom ends of the two movable screen sides 41, the sliding shaft 43 which is arranged at the position below the fixed block 44 is fixed on the movable screen side 41, the fixed blocks 44 are distributed between the two adjacent lug blocks 321 in a sliding manner, return springs 45 are respectively sleeved on the sliding shaft 43 and positioned at two sides of the two fixed blocks 44, two ends of each return spring 45 are respectively welded on the fixed block 44 and the lug blocks 321 (the return springs 45 mainly play two roles, the first point is that the whole movable screen assembly 4 is arranged obliquely, the movable screen side 41 is assembled with the lug block 321 in a sliding mode through the sliding shaft 43, and the sliding shaft 43 has a downward sliding trend, so that the return spring 45 can play a role in balance positioning, the balance position of the whole movable screen assembly 4 can be determined through the return spring 45, and the second point is that the return spring 45 can enhance the motion inertia in the process that the sliding shaft 43 slides left and right along the lug block 321); one end of the sliding shaft 43 is hinged with a pull rod 46, and the other end of the pull rod 46 is hinged with the frame-shaped base 11.

As shown in fig. 6 and 9, the fixed screen assembly 5 is mounted on the supporting frame mechanism 3; the fixed screen assembly 5 comprises two fixed screen sides 51 welded between the two driving boxes 31, a plurality of uniformly arranged fixed screen bars 52 are welded between the two fixed screen sides 51, the aligned fixed screen bars 52 are positioned above the aligned movable screen bars 42, and the fixed screen bars 52 are perpendicular to the movable screen bars 42.

During the formal screening, the two vibrating motors 22 are synchronously started to enable the two vibrating motors 22 to do synchronous rotating motion in opposite directions, then the two vibrating motors 22 generate exciting force to do linear vibration, the linear vibration direction is approximately perpendicular to the surface of the fixed beam plate 212, the ore material to be screened is put on a screen formed by combining the movable screen bars 42 and the fixed screen bars 52 at the position close to the feeding baffle plate 213, during the screening, on one hand, the linear vibration is transmitted to the elastic supporting seat 1, so that the whole structure comprising the vibrating box mechanism 2, the movable screen assembly 4 and the fixed screen assembly 5 generates vibration, then the screen generates synchronous vibration, the ore material is rapidly screened under the vibration effect, on the other hand, during the vibration of the movable screen assembly 4, the movable screen assembly 4 generates reciprocating vibration displacement relative to the frame-shaped base 11, because the movable sieve frame 41 is in sliding fit with the lug block 321 through the sliding shaft 43, one end of the sliding shaft 43 is hinged with the pull rod 46, and the other end of the pull rod 46 is hinged on the frame-shaped base 11, under the vibration action, the pull rod 46 can do reciprocating swing corresponding to the vibration amplitude around the hinged position of the frame-shaped base 11, and the sliding shaft 43 can do reciprocating sliding left and right along the lug block 321 while reciprocating swing, and then the whole row of movable sieve bars 42 do reciprocating linear motion relative to the fixed sieve bars 52 (because the partial motion freedom of the pull rod 46 and the sliding shaft 43 is reserved, self-adaptive passive motion can be made along with the vibration process), so the sieve holes of the sieve screen are dynamic sieve holes, and the sizes of the sieve holes are equal at any moment, so that the sieving function is not influenced, and the ore materials are difficult to form blockage in the sieve holes through the movable arrangement of the movable sieve bars 42, the effect of initiative clearance and reduction jam can be reached, good screening effect and higher screening efficiency can be maintained at long-time screening operation in-process, and can avoid causing the damage of screen cloth structure because of blockking up at to a great extent.

It should be noted that the screen surface formed by the aligned movable screen bars 42 and the screen surface formed by the aligned fixed screen bars 52 are mutually parallel, and the sliding direction of the sliding shaft 43 engaged with the lug 321 is also parallel to any screen surface, so that the distance between the aligned movable screen bars 42 and the aligned fixed screen bars 52 is kept unchanged during the movement of the movable screen sides 41 during the screening, that is, the movable screen bars 42 and the fixed screen bars 52 are always in a position state of close contact.

Those skilled in the art will appreciate that variations may be implemented by those skilled in the art in combination with the prior art and the above-described embodiments, and will not be described in detail herein. Such variations do not affect the essence of the present invention and are not described herein.

The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; it will be understood by those skilled in the art that various changes and modifications may be made, or equivalents may be modified, without departing from the spirit of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A mining shale shaker which characterized in that: comprises an elastic supporting seat (1), a vibration box mechanism (2) fixed on the elastic supporting seat (1), a bearing frame mechanism (3), a movable sieve component (4) and a fixed sieve component (5); the vibration box mechanism (2) comprises a vibration box (21) fixed on the elastic supporting seat (1) and two vibration motors (22) which are assembled on the top of the vibration box (21) in parallel and used for providing vibration sources; the bearing frame mechanism (3) is assembled in the vibration box (21), and the movable screen assembly (4) and the fixed screen assembly (5) are assembled on the bearing frame mechanism (3); wherein:

the bearing frame mechanism (3) comprises two driving boxes (31) which are arranged oppositely in a mirror image mode, the two driving boxes (31) are fixed on two inner side walls at opposite positions in the vibration box (21) in a one-to-one correspondence mode, a rectangular bearing frame (32) is assembled between the two driving boxes (31) in a sliding mode, a plurality of rectangular frame holes are distributed in the bearing frame (32) in a matrix arrangement mode, and a separation driving assembly (33) is assembled on each driving box (31); three lug blocks (321) are respectively and uniformly arranged at two opposite frame edge positions on the bearing frame (32), the three lug blocks (321) are arranged on the driving box (31) at the same side in a penetrating and sliding manner, and the bearing frame (32) is supported and placed between the two separated driving components (33) through the two groups of lug blocks (321) at the two side positions;

the movable screen assembly (4) is positioned between the two driving boxes (31), the movable screen assembly (4) comprises two movable screen sides (41) which are correspondingly and adjacently arranged with the two driving boxes (31) one by one, a plurality of movable screen bars (42) which are uniformly arranged are fixedly connected between the two movable screen sides (41), the movable screen bars (42) are arranged in an aligned manner and are distributed above the bearing frame (32), a sliding shaft (43) is arranged below each movable screen side (41), the sliding shaft (43) penetrates through and is slidably arranged on the three lug blocks (321) at adjacent positions, the bottom ends of the two movable screen sides (41) are respectively provided with two fixed blocks (44), the sliding shaft (43) positioned below the fixed blocks (44) is fixed on the movable screen sides (41), and the fixed blocks (44) are uniformly distributed between the two adjacent lug blocks (321), reset springs (45) are sleeved on the sliding shaft (43) and positioned on two sides of the two fixing blocks (44), and two ends of each reset spring (45) are respectively fixed on the fixing blocks (44) and the lug blocks (321); one end of the sliding shaft (43) is hinged with a pull rod (46), and the other end of the pull rod (46) is hinged on the elastic supporting seat (1);

the fixed screen assembly (5) comprises two fixed screen sides (51) fixedly connected between the two driving boxes (31), a plurality of uniformly arranged fixed screen bars (52) are fixedly connected between the two fixed screen sides (51), the fixed screen bars (52) are arranged above the movable screen bars (42), and the fixed screen bars (52) are perpendicular to the movable screen bars (42);

the two separation driving components (33) can drive the bearing frame (32) to slide between the two driving boxes (31) towards the direction far away from the whole row of the movable sieve bars (42);

the driving box (31) comprises rectangular guide side plates (311) and end plates (312) which are respectively and vertically fixed at two ends of the guide side plates (311), and the two end plates (312) are fixed on the inner side wall of the vibration box (21); the separation driving assembly (33) comprises an electric push rod (331) fixed on the outer side wall of one of the end plates (312), a spline shaft (332) fixedly connected with the output end of the electric push rod (331), three driving wedges (333) fixed on the spline shaft (332) and two guide blocks (334) in sliding guide fit with the spline shaft (332); the guide side plate (311) is provided with three guide holes (3111), the three guide holes (3111) correspond to the three ear blocks (321) on the same side of the bearing frame (32) one by one, and the ear blocks (321) are arranged on the guide holes (3111) in a penetrating and sliding manner; two guide block (334) are fixed on direction curb plate (311) and face on the lateral wall of vibration case (21) inside wall, three on ear piece (321) and stretch out the one end of guiding hole (3111) is provided with driven voussoir (322) respectively, it is three drive voussoir (333) one-to-one cooperation sets up threely the below of driven voussoir (322), just the inclined plane and the relative setting of drive voussoir (333) the inclined plane contact of driven voussoir (322).

2. The mining vibrating screen of claim 1, wherein: the elastic supporting seat (1) comprises a rectangular frame-shaped base (11), two supporting beams (111) are arranged on the frame-shaped base (11) in parallel, a first spring (12) and a second spring (13) are vertically and fixedly arranged at the top end of each supporting beam (111), the length of the first spring (12) is larger than that of the second spring (13), and connecting seats (14) are arranged at the top end of each first spring (12) and the top end of each second spring (13); the vibration box (21) is fixedly arranged on the four connecting seats (14); the other end of the pull rod (46) is hinged on the frame-shaped base (11).

3. The mining vibrating screen of claim 2, wherein: the vibration box (21) comprises two parallel supporting side plates (211) and a fixed beam plate (212) which is fixedly connected between the tops of the two supporting side plates (211) and is obliquely arranged, and the two vibration motors (22) are fixedly arranged on the fixed beam plate (212); the two supporting side plates (211) are fixed on the two groups of connecting seats (14) in a one-to-one correspondence manner, and the two groups of connecting seats (14) are positioned above the two supporting beams (111); the two driving boxes (31) are fixedly arranged on the inner side walls of the two supporting side plates (211) in a one-to-one correspondence mode.

4. The mining vibrating screen of claim 3, wherein: the driving box (31) further comprises a sealing sliding plate (313), the end plate (312) is of a right-angle trapezoid structure, the end plate (312) is fixedly connected to the inner side wall of the supporting side plate (211), the sealing sliding plate (313) is fixedly installed on a top opening formed by the surrounding of the guiding side plate (311), the supporting side plate (211) and the two end plates (312), and the sealing sliding plate (313) is arranged from the supporting side plate (211) to the guiding side plate (311) in an inclined and downward mode.

5. The mining vibrating screen of claim 3, wherein: a feeding baffle plate (213) is fixedly connected between the vertical side ends of the two supporting side plates (211).