CN218610375U

CN218610375U - Vibration classifying screen

Info

Publication number: CN218610375U
Application number: CN202222649483.0U
Authority: CN
Inventors: 杨梓晖
Original assignee: Wuxi Kanghui Machine Building Co Ltd
Current assignee: Wuxi Kanghui Machine Building Co Ltd
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-03-14
Anticipated expiration: 2032-10-09

Abstract

The utility model relates to a vibration classifying screen, it includes frame, a grit section of thick bamboo, vibrating motor, fine mesh and coarse screen, be connected with a plurality of fastening components on the lateral wall of frame, fastening components includes dwang, depression bar, rotation torsional spring and compresses tightly the piece, the one end of dwang is rotated and is connected on the lateral wall of frame, the other end of dwang is connected with the fixed axle, the one end of depression bar is rotated and is connected on the fixed axle, the one end that the depression bar was kept away from to the fixed axle is connected with the separation blade, rotate the torsional spring setting between separation blade and depression bar, it establishes at the fixed axle to rotate the torsional spring cover, the other end of dwang still is connected with the stopper, it connects on the other end of depression bar to compress tightly the piece, be provided with restriction dwang pivoted locating part on the dwang, when needs fixed fine mesh, stir the dwang, the depression bar rotates, and supports the stopper, it pushes down to compress tightly the piece the fine mesh. The utility model discloses the machining efficiency who improves the vibration classifying screen has.

Description

Vibration classifying screen

Technical Field

The utility model belongs to the technical field of the technique of vibration classifying screen and specifically relates to a vibration classifying screen is related to.

Background

The vibrating classifying screen is a machine for classifying mixtures with different particle sizes according to particle sizes by utilizing a vibrating screen surface, the angle of the screen surface is adjustable through reasonable screen surface inclination angles and screen mesh apertures, the screen surface is cleaned by a chain to reinforce screening, the classifying effect is ensured, and the vibrating classifying screen is compact in structure, neat and attractive in appearance; stable and reliable work and convenient operation and maintenance.

Aiming at the related technologies, the inventor considers that the screen of the vibration classifying screen is usually a grid net, the grid net is connected to a frame of the vibration classifying screen through bolts, the screen of different specifications needs to be replaced to screen sand and stones meeting the requirements along with the improvement of process requirements, the threads of the screw holes collide with the threads of the bolts after the vibration classifying screen is used for a long time, the threads of the screw holes and the threads of the bolts are easy to deform, the situation that the bolts cannot be locked occurs, even the phenomenon of tooth sliding occurs, the threaded holes need to be tapped again, the new bolts are replaced to lock the new screen, the installation time of the new screen is prolonged, and the processing efficiency of the vibration classifying screen is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve the machining efficiency of vibration classifying screen, this application provides a vibration classifying screen.

The application provides a vibration classifying screen adopts following technical scheme:

the utility model provides a vibration classifying screen, includes frame, grit section of thick bamboo, vibrating motor, fine screen cloth and coarse screen cloth, vibrating motor connects in the frame, be provided with fine screen chamber and coarse screen chamber in the frame, the fine screen intracavity is provided with first discharge gate, the coarse screen intracavity is provided with the second bin outlet, fine screen cloth connects the top in fine screen chamber, coarse screen cloth connects the top in coarse screen chamber, fine screen cloth with the coarse screen king all inclines to set up, fine screen cloth is located higher department, the grit section of thick bamboo is connected in the frame, and is located fine screen cloth's top, be connected with a plurality of fastening components on the lateral wall of frame, fastening component includes dwang, depression bar, rotation torsional spring and compresses tightly the piece, the one end of dwang is rotated and is connected on the lateral wall of frame, the other end of dwang is connected with the fixed axle, the one end of depression bar is rotated and is connected on the fixed axle, the one end of dwang is connected with the separation blade, rotate the torsional spring set up the separation blade with between the depression bar, the rotation torsional spring is established on the fixed axle, the other end of depression bar still is connected with the stopper, the depression bar is rotated and is held to the restriction on the another side of dwang the stopper, the depression bar rotation the fine screen cloth is pressed the stopper.

By adopting the technical scheme, when the fine screen needs to be compressed, a worker stirs the rotating rod until the limiting part limits the rotating rod, the pressing rod rotates under the action of the rotating torsion spring until the pressing rod abuts against the limiting part, and the pressing part presses the fine screen, so that the effect of compressing the fine screen is realized; when fine screen cloth is dismantled to needs, the staff loosens the locating part, and the dwang is stirred in the opposite direction, and the depression bar takes place rotatoryly behind the frame lateral wall of contradicting, can realize the dismantlement of fine screen cloth, realizes the loading and unloading of coarse screen cloth with the same reason. The staff passes through dwang, fastening components, depression bar and compresses tightly the cooperation of piece, makes the staff can change the screen cloth of different specifications fast at any time, has realized that the staff screens the grit of corresponding specification through vibrations according to the processing requirement, has improved the machining efficiency of vibration classifying screen.

Optionally, the pressing piece is a pressing plate, a connecting rod is connected to the pressing plate and perpendicular to the pressing plate, a through hole is formed in the other end of the pressing rod, the connecting rod penetrates through the through hole and is in sliding fit with the through hole, a pressing spring is connected between the pressing rod and the pressing plate, the pressing spring is sleeved on the connecting rod, a limiting rod is connected to the connecting rod and perpendicular to the connecting rod, the length of the limiting rod is smaller than the minimum diameter of the pressing spring, and an avoiding groove is formed in the other end of the pressing rod.

By adopting the technical scheme, when the fine screen needs to be compressed, a worker rotates the connecting rod, the pressing plate is lowered under the action of the pressing spring, and the limiting rod passes through the avoidance groove until the fine screen is compressed, so that the fine screen is installed; when the fine screen cloth is dismantled to needs, the staff reverse pulling connecting rod makes the restriction pole rotate the connecting rod through dodging behind the groove, can realize that the clamp plate breaks away from the fine screen cloth, and the loading and unloading is realized to the coarse screen cloth with the principle.

It is optional, the locating part is the spacer pin, the dwang is close to it has spacing hole to open on the lateral wall of frame, spacer pin sliding fit is in the spacing hole, the spacer pin with be provided with ejecting spring between the spacing hole bottom, it has the locking hole to open on the lateral wall of frame, compresses tightly when needs during the fine mesh screen cloth, spacer pin sliding fit is in the locking hole, open at the hole bottom in spacing hole has the sliding hole, the sliding hole is on a parallel with spacing hole, the spacer pin is kept away from the one end of frame is connected with the slide bar, the slide bar passes the sliding hole, and extend to the dwang is outside, the slide bar with sliding hole sliding fit.

By adopting the technical scheme, when a worker stirs the rotating rod to a specified angle, the limiting pin is displaced under the action of the ejecting spring and enters the locking hole, so that the rotating rod is fixed; when needs reverse stir the dwang, the staff pulling slide bar makes the spacer pin break away from the locking hole, can realize stirring the dwang.

Optionally, two inner side walls of the rack in the length direction are respectively connected with a plurality of extension plates, the extension plates are located above the fine screen, and two adjacent extension plates are arranged in a staggered manner.

Through adopting above-mentioned technical scheme, there is the phenomenon that the fine sand is not sieved when the fine screen cloth sieves the grit, and the journey board that prolongs is used for increasing the removal stroke by the screening sand stone, has increased the time that the grit was sieved, has improved the screening effect of vibration classifying screen.

Optionally, be provided with first hang plate in the fine screen intracavity, first discharge gate is located the lower extreme of first hang plate, be provided with the second hang plate in the coarse screen intracavity, the second discharge gate is located the lower extreme of second hang plate.

Through adopting above-mentioned technical scheme, the grit that drops into fine screen chamber gets into first bin outlet through the guide of first hang plate, and the grit that drops coarse screen chamber gets into the second bin outlet through the guide of second hang plate for the collection speed by the screening grit, improved the machining efficiency of vibration classifying screen.

Optionally, first bin outlet is close to fine screen chamber width direction's both sides wall department all is connected with first guide board, the second bin outlet is close to coarse screen chamber width direction's both sides wall department all is connected with the second guide board.

Through adopting above-mentioned technical scheme, fine sand drops and removes to the lowest department along first hang plate behind the fine screen chamber, has the grit possibility of piling up, and first guide board has blockked the easy region of piling up of grit, makes the fine sand get into first bin outlet more easily, and the second guide board makes the coarse sand get into the second bin outlet more easily with the reason, has further improved the machining efficiency of vibration classifying screen.

Optionally, a rubber pad is connected to the side wall of the pressing plate away from the connecting rod.

Through adopting above-mentioned technical scheme, the rubber pad is used for reducing the noise that screen cloth and clamp plate striking sent on one side, has cushioned the impact of screen cloth to the clamp plate on one side, has improved the life of clamp plate.

Optionally, one end of the limit pin close to the rack is provided with an inclination angle.

Through adopting above-mentioned technical scheme, the one end that the spacer pin is close to the frame sets up the angle of inclination, makes the spacer pin get into the locking hole more easily, has improved the efficiency of spacer pin restriction dwang.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the fine screen is required to be compressed, a worker stirs the rotating rod until the limiting part limits the rotating rod, the pressing rod rotates under the action of the rotating torsion spring until the pressing rod abuts against the limiting block, and the pressing part presses the fine screen, so that the effect of compressing the fine screen is realized; when fine screen cloth is dismantled to needs, the staff loosens the locating part, and the dwang is stirred in the opposite direction, and the depression bar takes place rotatoryly behind the frame lateral wall of contradicting, can realize the dismantlement of fine screen cloth, realizes the loading and unloading of coarse screen cloth with the same reason. Through the matching of the rotating rod, the fastening assembly, the pressing rod and the pressing piece, workers can quickly replace screens of different specifications at any time, so that the workers can screen sand stones of corresponding specifications through vibration according to processing requirements, and the processing efficiency of the vibration classifying screen is improved;

2. when the fine screen is required to be pressed, a worker rotates the connecting rod, the pressing plate is lowered under the action of the pressing spring, the limiting rod passes through the avoidance groove until the fine screen is pressed, and the fine screen is installed; when the fine screen is required to be disassembled, a worker reversely pulls the connecting rod to enable the limiting rod to rotate the connecting rod after passing through the avoidance groove, so that the pressing plate can be separated from the fine screen, and the coarse screen can be assembled and disassembled in the same way;

3. when a worker shifts the rotating rod to a specified angle, the limiting pin is displaced under the action of the ejecting spring and enters the locking hole, so that the rotating rod is fixed; when needs reverse stir the dwang, the staff pulling slide bar makes the spacer pin break away from the locking hole, can realize stirring the dwang.

Drawings

Fig. 1 is a schematic view of the overall structure of a vibrating classifying screen in the embodiment of the present application.

Fig. 2 is a schematic structural diagram of a first inclined plate, a second inclined plate, a first guide plate and a second guide plate in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a fixing assembly in an embodiment of the present application.

Fig. 4 is a plan view of a rotating lever in the embodiment of the present application.

Fig. 5 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A in fig. 4.

Fig. 6 is a view showing a state where the fixing member is detached from the fine mesh screen in the embodiment of the present application.

Description of reference numerals: 1. a frame; 11. a fine screen cavity; 111. a first discharge port; 12. a coarse screening chamber; 121. a second discharge opening; 13. a locking hole; 2. a sand and stone cylinder; 3. a vibration motor; 4. a fine screen; 5. coarse screening; 6. a fastening assembly; 61. rotating the rod; 611. a fixed shaft; 612. a baffle plate; 613. a spacing pin; 6131. a slide bar; 614. a limiting hole; 615. ejecting a spring; 62. a pressure lever; 621. an avoidance groove; 63. rotating the torsion spring; 64. pressing a plate; 641. a connecting rod; 642. a pressure applying spring; 643. a restraining bar; 644. a rubber pad; 65. a limiting block; 7. a range extending plate; 8. a first inclined plate; 81. a first guide plate; 9. a second inclined plate; 91. a second guide plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a vibration classifying screen. Referring to fig. 1 and 2, a vibratory classifying screen includes a frame 1, a sand drum 2, a vibration motor 3, a fine screen 4, and a coarse screen 5. Be provided with fine screen chamber 11 and coarse screen chamber 12 in the frame 1, the bottom in fine screen chamber 11 is provided with first bin outlet 111, and the bottom in coarse screen chamber 12 is provided with second bin outlet 121, and fine screen cloth 4 sets up in the top in fine screen chamber 11, and coarse screen cloth 5 sets up in the top in coarse screen chamber 12, and fine screen cloth 4 and coarse screen cloth 5 all incline the setting, and fine screen cloth 4 is located higher department. Gravel barrel 2 fixed connection is in frame 1, and is located the top of fine screen cloth 4, and vibrating motor 3 passes through bolted connection in the bottom of frame 1, between fine screen cloth 4 and the frame 1 and between coarse screen cloth 5 and the frame 1 all be connected with a plurality of fastening components 6, and fastening components 6 are used for fixed fine screen cloth 4 or coarse screen cloth 5.

Staff starts vibrating motor 3, makes frame 1 take place to vibrate, and the grit falls on fine mesh screen 4 from grit section of thick bamboo 2, and the grit removes through the vibration, and the grit is through fine mesh screen 4 and coarse screen 5 in proper order, realizes the grit of the different specifications of screening. The staff passes through the fixed fine screen 4 of a plurality of fastening components 6 and coarse screen 5, makes the staff can filter the grit of corresponding specification through vibrations according to the processing requirement at any time fast, has improved the machining efficiency of vibration classifying screen.

Referring to fig. 1 and 3, in the present embodiment, four sets of fastening members 6 are used to fasten the fine screen 4, and four sets of fastening members 6 are used to fasten the coarse screen 5. The fastening assembly 6 includes a rotating lever 61, a pressing lever 62, a rotating torsion spring 63, and a pressing member. One end of the rotating rod 61 is rotatably connected to the side wall of the rack 1, the other end of the rotating rod 61 is fixedly connected with a fixing shaft 611, one end of the pressing rod 62 is rotatably connected to the fixing shaft 611, one end of the fixing shaft 611, which is far away from the pressing rod 62, is fixedly connected with a blocking piece 612, a rotating torsion spring 63 is connected between the pressing rod 62 and the blocking piece 612, the rotating torsion spring 63 is wound on the fixing shaft 611, and the other end of the rotating rod 61 is also fixedly connected with a limiting block 65.

Referring to fig. 1 and 3, the pressing member is a pressing plate 64, one side wall of the pressing plate 64 presses the fine screen 4 or the coarse screen 5, the other side wall of the pressing plate 64 is fixedly connected with a connecting rod 641, one end of the pressing rod 62 far away from the rotating rod 61 is provided with a through hole, the connecting rod 641 penetrates through the through hole and is in sliding fit with the through hole, and the other end of the connecting rod 641 is fixedly connected with a first handle. A pressure spring 642 is connected between the pressure plate 64 and the pressure rod 62, and the pressure spring 642 is sleeved on the connecting rod 641. A limiting rod 643 is further fixedly connected to the connecting rod 641, the length of the limiting rod 643 is smaller than the minimum inner diameter of the pressing spring 642, and an avoiding groove 621 is formed in the position, corresponding to the limiting rod 643, of the pressing rod 62.

Referring to fig. 1, 4 and 5, the rotating rod 61 is connected with a limiting member, the limiting member is a limiting pin 613, the limiting pin 613 is disposed in a cylindrical shape, a limiting hole 614 is formed on a side wall of the rotating rod 61 close to the rack 1, and the limiting pin 613 is slidably fitted in the limiting hole 614. An ejection spring 615 is arranged in the limiting hole 614, and the ejection spring 615 is positioned between the limiting pin 613 and the bottom of the limiting hole 614. The side wall of the frame 1 is provided with a locking hole 13 which is in sliding fit with the limiting piece. The bottom of the limiting hole 614 is provided with a sliding hole parallel to the limiting hole 614, one end of the limiting pin 613 far away from the rack 1 is fixedly connected with a sliding rod 6131, the sliding rod 6131 penetrates and extends to the outside of the rotating rod 61, the sliding rod 6131 is in sliding fit with the sliding hole, and one end of the sliding rod 6131 far away from the limiting part is fixedly connected with a second handle.

When the fine screen 4 needs to be fastened, a worker shifts the rotating rod 61 until the limit pin 613 is displaced into the locking hole 13 under the action of the ejection spring 615, at the moment, the pressing rod 62 is rotated under the action of the rotating torsion spring 63 until the limit block 65 is abutted, then the worker rotates the connecting rod 641, the pressing plate 64 is lowered under the action of the pressing spring 642, the limit rod 643 penetrates through the avoiding groove 621, the pressing plate 64 presses the fine screen 4, and the installation of the fine screen 4 is realized; when the fine screen mesh 4 needs to be removed, the worker pulls the first handle to enable the pressing plate 64 to ascend, the limiting rod 643 rotates after passing through the avoiding groove 621 after abutting against the pressing rod 62, the limiting rod 643 abuts against the second handle after pulling until the limiting pin 613 is separated from the locking hole 13, the rotating rod 61 is finally pulled reversely, the pressing rod 62 abuts against the side wall of the rack 1 and then rotates, the fine screen mesh 4 can be detached, and similarly, the coarse screen mesh 5 can be detached.

Referring to fig. 1 and 3, in order to buffer the impact of the fine screen 4 or the coarse screen 5 on the pressing plate 64, a rubber pad 644 is fixedly connected to the side wall of the pressing plate 64 close to the fine screen 4 or the coarse screen 5.

Referring to fig. 5 and 6, in order to make the arresting pin 613 more easily enter the locking hole 13, an end of the arresting pin 613 near the frame 1 is provided with an inclination angle.

Referring to fig. 1, in order to improve the processing effect of the vibration classifying screen, a plurality of stroke extending plates 7 are fixedly connected to two inner side walls of the frame 1 in the length direction respectively, two stroke extending plates 7 are used as an example in the embodiment, the stroke extending plates 7 are located above the fine screen 4, two adjacent stroke extending plates 7 are arranged in a staggered mode, the stroke extending plates 7 are used for increasing the moving path of sand, the time for screening sand and stone is prolonged, and fine sand in sand and stone is screened as much as possible.

Referring to fig. 2, a first inclined plate 8 is fixedly connected to the bottom of the fine sieve chamber 11, and a first discharge port 111 is located at the lowest position of the first inclined plate 8. First discharge port 111 is close to first inclined plate 8 width direction's both sides fixedly connected with first guide plate 81 respectively, and first inclined plate 8 is used for guiding the fine sand to get into first discharge port 111, and first guide plate 81 is used for reducing the possibility that the fine sand is piled up.

Referring to fig. 2, a second inclined plate 9 is fixedly connected to the bottom of the coarse screen chamber 12, and a second discharge opening 121 is located at the lowest position of the second inclined plate 9. The second discharge opening 121 is fixedly connected with second guide plates 91 respectively near both sides of the second inclined plate 9 in the width direction, the second inclined plate 9 is used for guiding coarse sand to enter the second discharge opening 121, and the second guide plates 91 are used for reducing the possibility of accumulation of coarse sand.

The implementation principle of the vibrating classifying screen in the embodiment of the application is as follows: staff starts vibrating motor 3, makes frame 1 take place vibrations, and the grit falls on fine mesh screen 4 from grit section of thick bamboo 2, and the grit removes through vibrations, and the grit is through fine mesh screen 4 and coarse screen 5 in proper order, realizes the grit of the different specifications of screening.

When the fine screen 4 and the coarse screen 5 need to be installed, a worker firstly puts the fine screen 4 into the rack 1, moves the fine screen 4 to the lower part of the sand barrel 2, then puts the coarse screen 5, stirs the rotating rod 61 until the limiting pin 613 is moved into the locking hole 13 under the action of the ejection spring 615, at the moment, the pressing rod 62 is rotated under the action of the rotating torsion spring 63 until the limiting rod 65 is abutted, then the worker rotates the connecting rod 641, the pressing plate 64 is descended under the action of the pressing spring 642, the limiting rod 643 penetrates through the avoiding groove 621, the pressing plate 64 presses the fine screen 4 tightly, the installation of the fine screen 4 is realized, and the installation of the coarse screen 5 is realized in the same way; when coarse screen cloth 5 needs to be dismantled, the staff stimulates the first in command, make clamp plate 64 rise, after restriction lever 643 passed dodge groove 621, the first in command was rotated, restriction lever 643 contradicts depression bar 62, stimulate the second in command afterwards, break away from locking hole 13 until spacer pin 613, at last reverse stir dwang 61, depression bar 62 takes place to rotate after conflicting the lateral wall of frame 1, can realize dismantling coarse screen cloth 5, remove fine screen cloth 4 to coarse screen cloth 5's installation station can take out at last, realize fine screen cloth 4's dismantlement. The staff passes through the fixed fine screen cloth 4 of a plurality of fastening components 6 and coarse screen cloth 5, makes the staff load and unload fine screen cloth 4 and coarse screen cloth 5 fast, screens the grit of corresponding specification through vibrations according to the processing requirement, has improved the machining efficiency of vibration classifying screen.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a vibration classifying screen, includes frame (1), a grit section of thick bamboo (2), vibrating motor (3), fine screen cloth (4) and coarse screen cloth (5), vibrating motor (3) are connected in frame (1), be provided with fine screen chamber (11) and coarse screen chamber (12) on frame (1), be provided with first drain hole (111) in fine screen chamber (11), be provided with second bin outlet (121) in coarse screen chamber (12), fine screen cloth (4) are connected the top in fine screen chamber (11), coarse screen cloth (5) are connected the top in coarse screen chamber (12), fine screen cloth (4) with the coarse screen king all inclines to set up, fine screen cloth (4) are located higher department, a grit section of thick bamboo (2) are connected in frame (1), and are located the top of fine screen cloth (4), its characterized in that: be connected with a plurality of fastening components (6) on the lateral wall of frame (1), fastening components (6) include dwang (61), depression bar (62), rotation torsional spring (63) and compress tightly the piece, the one end of dwang (61) is rotated and is connected on the lateral wall of frame (1), the other end of dwang (61) is connected with fixed axle (611), the one end of depression bar (62) is rotated and is connected on fixed axle (611), fixed axle (611) are kept away from the one end of depression bar (62) is connected with separation blade (612), rotation torsional spring (63) set up separation blade (612) with between depression bar (62), rotation torsional spring (63) cover is established on fixed axle (611), the other end of dwang (61) still is connected with stopper (65), it connects to compress tightly the piece on the other end of depression bar (62), be provided with the restriction on dwang (61) pivoted locating part, when needs are fixed fine mesh screen cloth (4), stir depression bar (61), stopper (62) rotate, and support fine screen cloth (65), compress tightly.

2. A vibratory classifying screen as defined in claim 1, wherein: the pressing piece is a pressing plate (64), a connecting rod (641) is connected to the pressing plate (64), the connecting rod (641) is perpendicular to the pressing plate (64), a through hole is formed in the other end of the pressing rod (62), the connecting rod (641) penetrates through the through hole and is in sliding fit with the through hole, a pressing spring (642) is connected between the pressing rod (62) and the pressing plate (64), the pressing spring (642) is sleeved on the connecting rod (641), a limiting rod (643) is connected to the connecting rod (641), the limiting rod (643) is perpendicular to the connecting rod (641), the length of the limiting rod (643) is smaller than the minimum diameter of the pressing spring (642), and an avoiding groove (621) is formed in the other end of the pressing rod (62).

3. A vibratory sizing screen as defined in claim 1, wherein: the locating part is spacer pin (613), dwang (61) is close to it has spacing hole (614) to open on the lateral wall of frame (1), spacer pin (613) sliding fit is in spacing hole (614), spacer pin (613) with be provided with ejecting spring (615) between spacing hole (614) hole bottom, it has locking hole (13) to open on the lateral wall of frame (1), when needs compress tightly during fine mesh (4), spacer pin (613) sliding fit is in locking hole (13), open at the hole bottom of spacing hole (614) has the sliding hole, the sliding hole is on a parallel with spacing hole (614), spacer pin (613) are kept away from the one end of frame (1) is connected with slide bar (6131), slide bar (6131) passes the sliding hole, and extend to the dwang (61) outside, slide bar (6131) with sliding fit.

4. A vibratory classifying screen as defined in claim 1, wherein: the two inner side walls of the rack (1) in the length direction are respectively connected with a plurality of extension plates (7), the extension plates (7) are located above the fine screen (4), and two adjacent extension plates (7) are arranged in a staggered mode.

5. A vibratory sizing screen as defined in claim 1, wherein: be provided with first hang plate (8) in fine screen chamber (11), first discharge gate (111) are located the lowest of first hang plate (8), be provided with second hang plate (9) in coarse screen chamber (12), second discharge gate (121) are located the lowest of second hang plate (9).

6. A vibratory classifying screen as claimed in claim 5, wherein: first bin outlet (111) are close to both sides wall department in fine screen chamber (11) width direction all is connected with first guide board (81), second bin outlet (121) are close to coarse screen chamber (12) width direction's both sides wall department all is connected with second guide board (91).

7. A vibratory sizing screen as defined in claim 2, wherein: the side wall of the pressure plate (64) far away from the connecting rod (641) is connected with a rubber pad (644).

8. A vibratory classifying screen as claimed in claim 3, wherein: one end of the limit pin (613) close to the rack (1) is provided with an inclined angle.