CN108176583B

CN108176583B - Adjustable multilayer precision vibration screening device

Info

Publication number: CN108176583B
Application number: CN201810023730.1A
Authority: CN
Inventors: 龚智强; 吴胜; 梁三金
Original assignee: Chaohu University
Current assignee: Anhui Xinghui Industry Science And Technology Co
Priority date: 2018-01-10
Filing date: 2018-01-10
Publication date: 2021-05-07
Anticipated expiration: 2038-01-10
Also published as: CN108176583A

Abstract

The invention discloses an adjustable multilayer precise vibration screening device which comprises a rack, a feeding device, a first screening device, a first material receiving device, a first screening device, a second material receiving device and a controller. The feeding device positioned on one side of the rack is used for conveying materials and uniformly blanking, and the rack is provided with a controller; the screening device I is arranged above the material receiving device I and is used for primary screening; the material receiving device is arranged on the rack and used for collecting the materials after primary screening and uniformly blanking the materials after secondary screening; the screening device II is arranged on the rack and is used for secondary screening; and the second material receiving device is used for collecting materials and screening the materials again. The multi-layer precise screening device can overcome the defect that the existing screening device is not precise enough, is used in occasions such as a concrete mixing plant, a gravel stock ground and the like, has the functions of multi-layer precise screening and the like, and also has the advantages of multi-degree-of-freedom screening, high working efficiency, convenience in operation and maintenance and the like.

Description

Adjustable multilayer precision vibration screening device

Technical Field

The invention belongs to the field of screening machinery, and relates to an adjustable multilayer precise vibration screening device.

Background

At present, screening machines are widely used in multiple industries such as coal, metallurgy, mines, chemical industry, food and the like, and the existing screening operation equipment utilizes the relative motion of bulk materials and a screen surface to enable partial particles to penetrate through screen holes, so that materials such as sand, gravel, broken stone and the like are divided into vibrating screening mechanical equipment with different grades according to the particle size. The particle grade of the screening is determined by the screen surface, which is divided into three types of grate, plate screen and mesh screen. The grate is suitable for screening large-particle materials, and gaps of the grate are 1.1-1.2 times of the particle size of undersize materials and are generally not suitable to be smaller than 50 mm. The plate screen is formed by punching a steel plate, holes are circular, square or rectangular, the aperture is generally 10-80 mm, the service life is long, the plate screen is not easy to block, and the plate screen is suitable for screening medium particles. The mesh screen is woven or welded by the steel wire, and the hole is square, rectangle or rectangular shape, and the aperture is generally 6 ~ 85 millimeters commonly used, and rectangular shape sieve mesh is suitable for screening moist material, and the advantage of mesh screen is that effective area is great. The screening machine is divided into rolling screening and vibrating screening. The rolling screening includes sieve shaft type screening machines, drum screens, solid and spiral roller screens, blade type roller screens and the like, and the vibration screening basically comprises banana screens, high clothes screens, relaxation screens and the like.

The principle of screening general particle materials is as follows: the particles pass through the sieve plate and meet the sieve holes, the materials with the particle size smaller than the sieve holes pass through the sieve holes to become undersize materials, and the particles with the particle size larger than the sieve holes do not pass through the sieve holes to become oversize materials. The vibrating screen has the advantages that the vibrating screen strongly vibrates due to the screen box, so that the phenomenon that the screen holes are blocked by materials is reduced, and the screen has higher screening efficiency and productivity.

Most of the mainstream screening devices in the current market mainly adopt a vibrating screen and a fixed screen as an auxiliary screen; however, as for the existing vibrating screens, the vibrating efficiency still has a larger lifting space, so that there is a need to invent an adjustable multi-layer precise vibrating screening device which has the advantages of stability, reliability, low consumption, low noise, long service life, stable vibration mode, high screening efficiency and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a vibration screening machine with high efficiency and reliable screening to realize multi-stage screening of materials.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: an adjustable multi-layer precise vibration screening device comprises a rack, a feeding device, a screening device I, a material receiving device I, a screening device II, a controller and a material receiving device II, wherein the rack consists of an I-shaped column I, an I-shaped column II and a connecting column; the number of the connecting columns is three, wherein two connecting columns are fixedly connected between the I-shaped column I and the I-shaped column II, and the other connecting column is fixedly connected to the I-shaped column II; the feeding device is positioned on one side of the rack; the screening device is positioned above the material receiving device I; the first material receiving device is positioned above the second screening device; the second screening device is positioned on the rack; the controller is arranged on the frame; the second material receiving device is positioned below the second screening device;

the I-shaped column I is provided with a vertical groove and a square hole I; the feeding device consists of a lower base, a power device I, a lifting plate, an upright post, a steel rope I, a movable platform I, a pulley block, an upper cover plate and a steel rope II; the first power device comprises a first motor, a first gear, a first rope winding group and a second rope winding group; the first motor is arranged on the lower base through a bolt; the first gear is arranged on an output shaft of the first motor through a key; the first rope winding group is arranged on the lower base and comprises a gear II, a shaft I, a first rope winder and a support I; the second gear is arranged on the first shaft through a key and meshed with the first gear; the first shaft is arranged on the first support through a bearing; the first rope winder is fixedly connected to the first shaft; the first support is fixedly connected to the lower base; the rope winding group II is arranged on the lower base and comprises a gear III, a shaft II, a rope winder II and a support II; the third gear is arranged on the second shaft through a key and meshed with the first gear; the shaft II is arranged on the support II through a bearing; the second rope winder is fixedly connected to the second shaft; the second support is fixedly connected to the lower base; the lifting plate is provided with a first sliding groove; four upright columns are arranged, one end of each upright column is fixedly connected to the lower base, and the other end of each upright column is fixedly connected to the upper cover plate; two steel ropes are arranged on the two sides of the upper cover plate respectively; one end of the first steel rope is connected to the lifting plate, and the other end of the first steel rope is fixedly connected to the first rope winder by bypassing the first pulley; the first movable platform is positioned on the lifting plate and comprises a movable base, a first hydraulic cylinder and a loading box; the movable base is arranged in the first sliding groove, and the movable base and the lifting plate form a moving pair; the movable base is provided with an interface; the first hydraulic cylinder comprises a first cylinder body and a first piston rod; the first cylinder body is arranged on the movable base; the first piston rod is fixedly connected with the charging box; the charging box is arranged on the movable base through a pin; the pulley blocks are arranged at two sides of the upper cover plate respectively and comprise a first pulley and a second pulley; the first pulley is arranged on the upper cover plate; the second pulley is arranged on the upper cover plate; the upper cover plate is fixedly connected to the upright post; two steel ropes are arranged and are respectively positioned on two sides of the upper cover plate; one end of the second steel rope is fixedly connected to the lifting plate, and the other end of the second steel rope is fixedly connected to the second rope winder by bypassing the second pulley.

The first screening device consists of a first support, a first discharging device, a first screening frame, a first screen body, a pulling device, an up-down vibration power device, a transverse vibration power device and a buffering device; the first support is fixedly connected to the support frame; the first bracket is provided with a second sliding groove and a first square groove; the first discharging device is arranged on the supporting frame and comprises an electromagnet, a discharging box frame, an L-shaped box, a first sliding block, a second hydraulic cylinder, a third hydraulic cylinder, a cylindrical nail and a third support; the electromagnet is arranged on the material outlet box; the discharging box is arranged in the first guide groove, and the discharging box frame form a sliding pair; the discharging box frame is fixedly connected to the supporting frame; the discharging box frame is provided with a first guide groove; the L-shaped box is fixedly connected to the discharging box frame, and a square groove II is formed in the L-shaped box; one end of the first sliding block is arranged in the second square groove, the first sliding block and the L-shaped box form a moving pair, the other end of the first sliding block is arranged on the third support, and the first sliding block and the third support form a rotating pair; the second hydraulic cylinder comprises a second cylinder body and a second piston rod; the second cylinder body is arranged on the L-shaped box; the second piston rod is fixedly connected with the first sliding block; the hydraulic cylinder III comprises a cylinder body III and a piston rod III; the cylinder body III is arranged on the discharging box frame; the third piston rod is fixedly connected with the discharge box; four cylindrical nails are arranged and are fixedly connected to two sides of the material outlet box respectively; the third support is fixedly connected to the material outlet box; the first screening frame is fixedly connected to the support frame; the first screen body is arranged on the first screening frame through a pin shaft; the first screen body comprises a pin shaft, an outer shell frame, a first spring, a screen frame, a first screen mesh, a round shaft, a rectangular block, a fourth hydraulic cylinder and a magnetic iron block; the pin shaft is fixedly connected with the shell frame; the shell frame is arranged on the first screening frame; a second guide groove is formed in the shell frame; the first spring is provided with five springs which are all arranged between the outer shell frame and the screen frame; the screen frame is arranged on the second guide groove, and the screen frame and the outer shell frame form a moving pair; the first screen is arranged on the screen frame through a circular shaft; the rectangular block is fixedly connected to the screen frame; the hydraulic cylinder IV comprises a cylinder body IV and a piston rod IV; the cylinder body IV is arranged on the rectangular block; the piston rod IV is connected to the screen I; the magnetic iron block is fixedly connected to the first screen; the two groups of pulling devices are arranged on the first support and comprise a second support, a second motor, a fourth gear, a rack and a pull rod; the second bracket is fixedly connected to the first bracket; the second motor is arranged on the second bracket through a bolt; the fourth gear is arranged at the output end of the second motor through a key; the rack is arranged in the second sliding groove, and the rack and the first bracket form a sliding pair; the rack is meshed with the gear; the pull rod is arranged on the second sliding groove, and the pull rod and the first bracket form a sliding pair; one end of the pull rod is fixedly connected to the rack, and the other end of the pull rod is fixedly connected with a joint; the up-down vibration power device is arranged on the first support and comprises a third motor, a first connecting rod mechanism, a fourth support, a fourth pulley, a first flexible rope, a fifth pulley, a round rod and a pulling mechanism; the motor III is arranged on the bracket I through a bolt; the first connecting rod mechanism comprises a first connecting rod, a second connecting rod and a second sliding block; the first connecting rod is arranged on an output shaft of the third motor; the second connecting rod is connected with the first connecting rod through a hinge; the second sliding block is arranged in the first square groove and forms a sliding pair with the first square groove; the fourth support is fixedly connected to the first support; the pulley IV is arranged on the support IV; one end of the flexible rope I is fixedly connected to the sliding block II, and the other end of the flexible rope I bypasses the pulley IV and is fixedly connected to the pulley V; the fifth pulley is fixedly connected to the round rod; the two groups of pulling mechanisms are respectively arranged at two ends of the round rod and comprise a third connecting rod, a fifth support and a third steel rope; the connecting rod III is arranged on the support V, and the connecting rod III and the support V form a revolute pair; the fifth support is fixedly connected to the first support; one end of the steel rope III is fixedly connected to the connecting rod III, and the other end of the steel rope III is connected to the shell frame; the transverse vibration power device is arranged on the support frame and comprises a motor IV, a link mechanism II, a pulley VI, a support VI, a pulley VII, a support VII, a pulley VIII, a support VIII and a flexible rope II; the motor four-way is arranged on the support frame through a bolt; the second connecting rod mechanism comprises a fourth connecting rod, a fifth connecting rod and a third sliding block; the fourth connecting rod is arranged on an output shaft of the fourth motor; the fifth connecting rod is connected with the fourth connecting rod through a hinge; the third sliding block is arranged in the third square groove and forms a sliding pair with the support frame; the sixth pulley is arranged on the sixth support; the sixth support is fixedly connected to the support frame; the pulley seventh is arranged on the support seventh; the support seventh is fixedly connected to the support frame; the pulley eight is arranged on the support eight; the support eight is fixedly connected to the screening frame I; one end of the flexible rope II is fixedly connected to the sliding block III, and the other end of the flexible rope II is fixedly connected to the screen frame by bypassing the pulley eight and the pulley seven; the buffer device is arranged below the support frame and comprises a reset box, a fourth sliding block, a second spring, a ninth pulley and a third flexible rope; the reset box is provided with a first round hole and a third sliding groove; the reset box is fixedly connected to the support frame; the third sliding block is arranged in the third sliding groove, and the third sliding block and the reset box form a sliding pair; the two springs are arranged, one end of the second spring is fixedly connected to the fourth sliding block, and the other end of the second spring is fixedly connected to the inner wall of the reset box; the pulley nine is arranged in the square hole II; one end of the flexible rope III is fixedly connected to the sliding block III, and the other end of the flexible rope III penetrates through the round hole I, bypasses the pulley nine and is fixedly connected to the screen frame;

the first material receiving device consists of a power device II, uniformly distributed boxes, a supporting frame, a collecting box, an electromagnetic door I and an electromagnetic door II; two groups of power devices are arranged on the rack, and each power device comprises a rectangular box, a motor five and a screw rod; the rectangular box is fixedly connected to the frame; the rectangular box is provided with a square groove IV; the motor V is arranged on the I-shaped column; the screw rod is arranged on the rectangular box through a bearing and is connected to an output shaft of the motor V; the uniformly distributed boxes are fixedly connected to the screw rod; the supporting frame is provided with a square groove III and a square hole II; the support frame is fixedly connected to the rectangular box; the collecting box is arranged on the supporting frame; the first electromagnetic door is arranged on the collecting box; and the second electromagnetic door is arranged on the uniformly distributed boxes.

The second screening device consists of a fixed platform, a third power device, a fourth power device, a second screen body, a second discharging device, a return device and a sliding door device; the fixed platform is fixedly connected to the rack; the power device III comprises an upper plate I, a support I, a lower plate I, a power transmission device, a support nine, a pulley ten, a flexible rope five, a pulley ten and a support ten; one end of each strut is fixedly connected to the upper plate I, and the other end of each strut is fixedly connected to the lower plate I; the first lower plate is provided with a sliding groove IV, the power transmission device is arranged on the first lower plate and comprises a motor VI, a gear V, a gear VI, a shaft III, a flexible rope IV, an eccentric wheel I and a slide block V; the motor six is fixedly connected to the lower plate I; the fifth gear is arranged on an output shaft of the sixth motor through a key; the sixth gear is arranged on the third shaft through a key and meshed with the fifth gear; two ends of the third shaft are respectively arranged on the first upper plate and the first lower plate through bearings; the first eccentric wheel is fixedly connected to the third shaft and provided with a circular groove; the flexible rope IV is arranged in a circular groove of the eccentric wheel I, and two ends of the flexible rope IV are fixedly connected to the sliding block IV; the fourth sliding block is arranged in the fourth sliding groove, and the fourth sliding block and the first lower plate form a sliding pair; the support seat nine is fixedly connected to the lower plate I; the pulley ten is arranged on the support nine; one end of the flexible rope five is fixedly connected to the sliding block five, and the other end of the flexible rope five bypasses the pulley ten and the pulley eleven and is fixedly connected to the screening frame two; the power device IV comprises an upper plate II, a support II, a lower plate II, a pushing power device and a pushing device; four second support columns are arranged, one end of each second support column is fixedly connected to the second upper plate, and the other end of each second support column is fixedly connected to the second lower plate; the pushing power device is arranged on the second lower plate and comprises a motor seven, a gear eight, a shaft four, an eccentric wheel two, an ejector rod and a parallel block; the motor seventh is fixedly connected with the lower plate II; the gear seven is connected to an output shaft of the motor seven through a key; the gear eight is arranged on the shaft four through a key and meshed with the gear seven; the shaft four-way is arranged on the upper plate II and the lower plate II through bearings; the eccentric wheel II is fixedly connected to the shaft IV; the ejector rod is contacted with the eccentric wheel to form a cam mechanism; the ejector rod is arranged in the third guide groove, and the ejector rod and the parallel block form a moving pair; the ejector rod is fixedly connected to the second movable platform; the parallel blocks are fixedly connected to the second upper plate; the parallel block is provided with a third guide groove; the pushing device is arranged on the second upper plate and comprises a movable platform II, a fixed vertical rod, a guide rod and a spring III; the second movable platform is fixedly connected to the movable frame; a first groove is formed in the second movable platform; one end of the fixed vertical rod is arranged on the first groove, and the fixed vertical rod and the movable platform II form a moving pair; the other end is fixedly connected to the second upper plate; a second round hole is formed in the fixed vertical rod; two guide rods are arranged, one end of each guide rod is fixedly connected to the second movable platform, and the other end of each guide rod penetrates through the second round hole; the second spring is sleeved on the guide rod, one end of the second spring is fixedly connected to the second movable platform, and the other end of the second spring is fixedly connected to the fixed vertical rod; the second screen body is positioned on the fixed platform and comprises a moving frame, a first supporting mechanism, a second screening frame, a second screen and a first sliding door; the movable frame is arranged in the guide groove IV, and the movable frame and the fixed platform form a movable pair; the first support mechanism and the second support mechanism are arranged between the moving frame and the second screening frame respectively, and each first support mechanism comprises a first support rod and a second support rod; a second groove is formed in the first support rod; two ends of the first supporting rod are respectively connected to the moving frame and the screening frame II through hinges; one end of the second supporting rod is connected to the moving frame through a hinge, the other end of the second supporting rod is installed in the second groove, and the second supporting rod and the first supporting rod form a moving pair; two groups of support mechanisms are arranged between the moving frame and the screening frame II, and each support mechanism II comprises a support rod III, a support rod IV and a hydraulic cylinder V; two ends of the supporting rod III are respectively connected to the moving frame and the sieve body II through hinges; a third groove is formed in the third support rod; one end of the support rod IV is connected to the moving frame through a hinge, the other end of the support rod IV is arranged in the groove III, and the support rod IV and the support rod III form a moving pair; the hydraulic cylinder five comprises a cylinder body five and a piston rod five, the cylinder body five is mounted on the moving platform through a hinge, and the piston rod five is mounted on the rod piece four; the second screening body is positioned above the moving frame; the second screen is arranged on the second screening frame; the first sliding door is arranged on the second screening frame; the second discharging device is fixedly connected to the fixed platform; the return device is arranged on the rack and comprises a weight block, a roller, a support eleven, a flexible rope six, a pulley twelve, a pulley thirteen and a support twelve; the weight block is arranged in the vertical groove, and the weight block and the I-shaped column I form a moving pair; the roller is arranged on the support eleven; the eleven support seats are fixedly connected to the first I-shaped column; one end of the flexible rope six is connected to the heavy object block, and the other end of the flexible rope six is connected to the screening frame two by bypassing the roller, the pulley twelve and the pulley thirteen; the pulley twelve is arranged on the square hole I; the pulley thirteen is arranged on the support twelve; the support twelve is arranged on the I-shaped column I; the sliding door device is positioned on one side of the frame; the sliding door device comprises a bottom plate, an eight motor, a nine gear, a ten gear, a five shaft, a three rope winder and a pulling device; the bottom plate is fixedly connected to the I-shaped column; the motor eight is arranged on the bottom plate through a bolt; the gear nine is arranged on an output shaft of the motor eight through a key; the gear ten is fixedly connected to the shaft five and meshed with the gear nine; two ends of the fifth shaft are respectively installed on the first I-shaped column through bearings; the two rope winders are respectively arranged at two ends of the shaft V; the two groups of pulling devices are respectively arranged on two sides of the rack; the pulling device comprises a fourteen pulley, a fifteen pulley and a four steel rope; the pulley fourteen is arranged on the rectangular box; the pulley fifteen is arranged on the rectangular box; one end of the steel rope IV is connected to the rope winder III, and the other end of the steel rope IV bypasses the pulley fourteen and the pulley fifteen to be fixedly connected to the sliding door I.

The controller is arranged on the I-shaped column II; the second material receiving device comprises a material receiving box, a conveying device and a screening net; the two material receiving boxes are positioned at the lower end of the screening net; the material receiving box comprises a material receiving box body, a sliding door II, a handle I, a material pulling plate and a handle II; the material receiving box body is positioned below the screening net; the sliding door II is arranged on the material receiving box body through a pin; the first handle is fixedly connected to the second sliding door; the material pulling plate is arranged in the material receiving box body, and the material pulling plate and the material receiving box body form a moving pair; the second handle is fixedly connected to the material pulling plate; the conveying device is positioned between the two material receiving boxes and comprises a motor nine, a winding drum and a conveying belt; the motor nine is arranged on the material receiving box body through a bolt; the winding drum is arranged on an output shaft of the motor nine; the conveyer belt is arranged on the winding drum; one end of the screening net is fixedly connected to the material receiving box body, and the other end of the screening net is fixedly connected to the fixed platform.

The invention has the beneficial effects that: the invention realizes semi-automation while realizing precise screening, and has simple integral structure and low manufacturing cost; the material can be screened in multiple stages, and particles required by people can be screened out; and a plurality of discharging devices are arranged at the same time, so that the working efficiency is greatly improved, the working time is reduced, and the industrial large-scale production is easy to realize.

Drawings

FIG. 1 is a schematic diagram of the general structure of the present invention;

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

FIG. 3 is a schematic structural diagram of a first screening device and a first material receiving device of the invention;

FIG. 4 is a schematic view of a second aspect of the screening device of the present invention;

FIG. 5 is a schematic view of a second orientation of a second screening device of the present invention;

FIG. 6 is a schematic structural diagram of a first discharging device of the present invention;

fig. 7 is a schematic structural view of a second material receiving device of the invention;

fig. 8 is a schematic structural view of a screen body-device of the present invention.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments and the drawings.

As shown in fig. 1 and 3, an adjustable multi-layer precise vibration screening device is characterized in that: the automatic material receiving device comprises a rack 1, a feeding device 2, a first screening device 3, a first material receiving device 4, a second screening device 5, a controller 6 and a second material receiving device 7, wherein the rack 1 consists of a first I-shaped column 11, a second I-shaped column 12 and a connecting column 13; the number of the connecting columns 13 is three, wherein two connecting columns 13 are fixedly connected between the I-shaped column I11 and the I-shaped column II 12, and the other connecting column 13 is fixedly connected on the I-shaped column II 12; the feeding device 2 is positioned at one side of the frame 1; the first screening device 3 is positioned above the first material receiving device 4; the first material receiving device 4 is positioned above the second screening device 5; the second screening device 5 is positioned on the rack 1; the controller 6 is arranged on the frame 1; the second material receiving device 7 is positioned below the second screening device 5;

as shown in fig. 1, 2 and 3, a vertical groove 111 and a square hole 112 are formed on the i-shaped column 11; the feeding device 2 consists of a lower base 21, a power device I22, a lifting plate 23, an upright post 24, a steel rope I25, a movable platform I26, a pulley block 27, an upper cover plate 28 and a steel rope II 29; the two power devices 22 are respectively arranged on two sides of the lower base 21, and each power device 22 comprises a motor I221, a gear I222, a rope winding group I223 and a rope winding group II 224; the first motor 221 is mounted on the lower base 21 through bolts; the first gear 222 is arranged on an output shaft of the first motor 221 through a key; the first rope winding group 223 is arranged on the lower base 21, and the first rope winding group 223 comprises a second gear 2231, a first shaft 2232, a first rope winder 2233 and a first support 2234; the second gear 2231 is arranged on the first shaft 2232 through a key, and the second gear 2231 is meshed with the first gear 222; the first shaft 2232 is mounted on the first support 2234 through a bearing; the first rope winder 2233 is fixedly connected to the first shaft 2232; the first support 2234 is fixedly connected to the lower base 21; the second rope winding group 224 is installed on the lower base 21, and the second rope winding group 224 comprises a gear three 2241, a shaft two 2242, a second rope winder 2243 and a support II 2244; the third gear 2241 is mounted on the second shaft 2242 through a key, and the third gear 2241 is meshed with the first gear 222; the second shaft 2242 is mounted on the second support 2244 through a bearing; the second rope winder 2243 is fixedly connected to the second shaft 2242; the second support 2244 is fixedly connected to the lower base 21; the lifting plate 23 is provided with a first sliding groove 231; four upright columns 24 are arranged, one end of each upright column 24 is fixedly connected to the lower base 21, and the other end of each upright column 24 is fixedly connected to the upper cover plate 28; two steel ropes I25 are arranged and are respectively positioned at two sides of the upper cover plate 28; one end of a first steel rope 25 is connected to the lifting plate 23, and the other end of the first steel rope is fixedly connected to a first rope winder 2233 by bypassing the first pulley 271; the first movable platform 26 is positioned on the lifting plate 23, and the first movable platform 26 comprises a movable base 261, a first hydraulic cylinder 262 and a charging box 263; the movable base 261 is arranged in the first sliding groove 231, and the movable base 261 and the lifting plate 23 form a moving pair; an interface 2611 is arranged on the movable base 261; the first hydraulic cylinder 262 comprises a first cylinder body 2621 and a first piston rod 2622; the first cylinder 2621 is mounted on the movable base 261; the first piston rod 2622 is fixedly connected with the charging box 263; the cartridge 263 is mounted on the movable base 261 by a pin; two groups of pulley blocks 27 are arranged on two sides of the upper cover plate 28 respectively, and each pulley block 27 comprises a first pulley 271 and a second pulley 272; the first pulley 271 is arranged on the upper cover plate 28; the second pulley 272 is arranged on the upper cover plate 28; the upper cover plate 28 is fixedly connected to the upright post 24; two steel ropes 29 are arranged and are respectively positioned at two sides of the upper cover plate 28; one end of the second steel rope 29 is fixedly connected to the lifting plate 23, and the other end of the second steel rope is fixedly connected to the second rope winder 2243 by bypassing the second pulley 272.

As shown in fig. 1, 3, 6 and 8, the first screening device 3 consists of a first bracket 31, a first discharging device 32, a first screening frame 33, a first screen body 34, a pulling device 35, an up-down vibration power device 36, a transverse vibration power device 37 and a buffering device 38; the first bracket 31 is fixedly connected to the support frame 43; the first bracket 31 is provided with a second sliding groove 311 and a first square groove 312; the first discharging device 32 is arranged on the supporting frame 43, and the first discharging device 32 comprises an electromagnet 321, a discharging box 322, a discharging box frame 323, an L-shaped box 324, a first sliding block 325, a second hydraulic cylinder 326, a third hydraulic cylinder 327, a cylindrical nail 328 and a third support 329; the electromagnet 321 is arranged on the material outlet box 322; the discharging box 322 is arranged in the first guide groove 3231, and the discharging box 322 and the discharging box frame 323 form a moving pair; the discharging box frame 323 is fixedly connected on the supporting frame 43; the discharging box frame 323 is provided with a first guide groove 3231; the L-shaped box 324 is fixedly connected to the discharging box frame 323, and a square groove II 3241 is formed in the L-shaped box 324; one end of the first sliding block 325 is arranged in the second square groove 3241, the first sliding block 325 and the L-shaped box 324 form a moving pair, the other end of the first sliding block 325 is arranged on the third support 329, and the first sliding block 325 and the third support 329 form a rotating pair; the second hydraulic cylinder 326 comprises a second cylinder body 3261 and a second piston rod 3262; the second cylinder 3261 is arranged on the L-shaped box 324; the second piston rod 3262 is fixedly connected with the first sliding block 325; the hydraulic cylinder III 327 comprises a cylinder body III 3271 and a piston rod III 3272; the cylinder body III 3271 is arranged on the discharging box frame 323; the piston rod III 3272 is fixedly connected with the discharge box 322; four cylindrical nails 328 are provided and are respectively fixedly connected with two sides of the discharging box 322; the third support 329 is fixedly connected to the material outlet box 322; the first screening frame 33 is fixedly connected to the support frame 43; the first sieve body 34 is arranged on the first sieving frame 33 through a pin 341; the first screen body 34 comprises a pin shaft 341, a housing frame 342, a first spring 343, a screen frame 344, a first screen 345, a round shaft 346, a rectangular block 347, a fourth hydraulic cylinder 348 and a magnetic iron block 349; the pin 341 is fixedly connected with the shell frame 342; the shell frame 342 is arranged on the first screening frame 33; the shell frame 342 is provided with a second guide groove 3421; five springs 343 are arranged between the outer shell frame 342 and the screen frame 344; the screen frame 344 is arranged on the second guide groove 3421, and the screen frame 344 and the outer shell frame 342 form a moving pair; the first screen 345 is mounted on the screen frame 344 through a round shaft 346; the rectangular block 347 is fixedly connected to the screen frame 344; the hydraulic cylinder four 348 comprises a cylinder body four 3481 and a piston rod four 3482; the cylinder block IV 3481 is arranged on the rectangular block 347; the piston rod four 3482 is connected to the screen one 345; the magnetic iron block 349 is fixedly connected to the first screen 345; two groups of pulling devices 35 are arranged on the first support 31, and each pulling device 35 comprises a second support 351, a second motor 352, a fourth gear 353, a rack 354 and a pull rod 355; the second bracket 351 is fixedly connected to the first bracket 31; the second motor 352 is mounted on the second bracket 351 through a bolt; the gear four 353 is arranged at the output end of the motor two 352 through a key; the rack 354 is arranged in the second sliding groove 311, and the rack 354 and the first bracket 31 form a moving pair; the rack 354 is meshed with the gear wheel IV 353; the pull rod 355 is installed on the second sliding groove 311, and the pull rod 355 and the first bracket 31 form a sliding pair; one end of the pull rod 355 is fixedly connected to the rack 354, and the other end of the pull rod 355 is fixedly connected with a joint 3551; the up-down vibration power device 36 is arranged on the first bracket 31, and the up-down vibration power device 36 comprises a motor three 361, a link mechanism one 362, a support four 363, a pulley four 364, a flexible rope one 365, a pulley five 366, a round rod 367 and a pulling mechanism 368; the motor III 361 is arranged on the bracket I31 through a bolt; the first connecting rod mechanism 362 comprises a first connecting rod 3621, a second connecting rod 3622 and a second sliding block 3623; the first connecting rod 3621 is arranged on an output shaft of the third motor 361; the second connecting rod 3622 is connected with the first connecting rod 3621 through a hinge; the second sliding block 3623 is arranged in the first square groove 312 and forms a sliding pair with the first square groove; the support four 363 is fixedly connected to the support one 31; the pulley four 364 is arranged on the support four 363; one end of the first flexible rope 365 is fixedly connected to the second sliding block 3623, and the other end of the first flexible rope is fixedly connected to the fifth sliding block 366 by bypassing the fourth sliding block 364; the five pulley 366 is fixedly connected to the round rod 367; two groups of pulling mechanisms 368 are respectively arranged at two ends of the round rod 367, and each pulling mechanism 368 comprises a connecting rod III 3681, a support saddle V3682 and a steel rope III 3683; the connecting rod III 3681 is arranged on the support V3682, and the connecting rod III 3681 and the support V3682 form a rotating pair; the fifth support 3682 is fixedly connected to the first bracket 31; one end of the steel rope III 3683 is fixedly connected to the connecting rod III 3681, and the other end of the steel rope III is connected to the shell frame 342; the transverse vibration power device 37 is arranged on the support frame 43, and the transverse vibration power device 37 comprises a motor IV 371, a link mechanism II 372, a pulley VI 373, a support VI 374, a pulley VII 375, a support VII 376, a pulley VIII 377, a support VIII 378 and a flexible rope II 379; the motor IV 371 is arranged on the supporting frame 43 through a bolt; the second link mechanism 372 comprises a fourth link 3721, a fifth link 3722 and a third slide block 3723; the four connecting rods 3721 are arranged on the output shaft of the four motors 371; the five connecting rods 3722 are connected with the four connecting rods 3721 through hinges; the third sliding block 3723 is arranged in the third square groove 431, and the third sliding block 3723 and the support frame 43 form a sliding pair; the pulley six 373 is arranged on the support six 374; the support six 374 is fixedly connected to the support frame 43; the pulley seven 375 is arranged on the support seven 376; the support saddle 376 is fixedly connected to the support frame 43; the pulley eight 377 is arranged on the support eight 378; the eight 378 support is fixedly connected to the first screening frame 33; one end of the second flexible rope 379 is fixedly connected to the third sliding block 3723, and the other end of the second flexible rope is fixedly connected to the screen frame 344 by bypassing the eight pulley 377 and the seven pulley 375; the buffer device 38 is installed below the support frame 43, and the buffer device 38 comprises a reset box 381, a slide block four 382, a spring two 383, a pulley nine 384 and a flexible rope three 385; the reset box 381 is provided with a first round hole 3811 and a third sliding chute 3812; the reset box 381 is fixedly connected to the support frame 43; the third sliding block 382 is arranged in the third sliding groove 3812, and the third sliding block 382 and the reset box 381 form a moving pair; two springs 383 are provided, one end of each spring 383 is fixedly connected to the slide block IV 382, and the other end of each spring 383 is fixedly connected to the inner wall of the reset box 381; the pulley nine 384 is arranged in the square hole II 432; one end of the flexible rope III 385 is fixedly connected to the sliding block III 382, and the other end of the flexible rope III penetrates through the round hole I3811, bypasses the pulley nine 384 and is fixedly connected to the screen frame 344;

as shown in fig. 1 and 3, the first material receiving device 4 is composed of a second power device 41, a uniform distribution box 42, a support frame 43, a collection box 44, a first electromagnetic door 45 and a second electromagnetic door 46; two groups of power devices 41 are arranged on the rack 1, and each power device 41 comprises a rectangular box 411, a motor five 412 and a screw 413; the rectangular box 411 is fixedly connected to the frame 1; the rectangular box 411 is provided with a square groove IV 4111; the fifth motor 412 is arranged on the I-shaped column 12; the screw 413 is mounted on the rectangular box 411 through a bearing and connected to an output shaft of the motor five 412; the uniform distribution box 42 is fixedly connected on the screw rod 413; a square groove III 431 and a square hole II 432 are formed in the supporting frame 43; the supporting frame 43 is fixedly connected to the rectangular box 411; the collecting box 44 is arranged on the supporting frame 43; the electromagnetic door I45 is arranged on the collection box 44; the second electromagnetic door 46 is arranged on the uniform distribution box 42.

As shown in fig. 1, 4 and 5, the second screening device 5 comprises a fixed platform 51, a third power device 52, a fourth power device 53, a second screen 54, a second discharging device 55, a returning device 56 and a sliding door device 57; the fixed platform 51 is fixedly connected to the frame 1; the third power device 52 is positioned at one side of the frame 1, and the third power device 52 comprises a first upper plate 521, a first strut 522, a first lower plate 523, a power transmission device 524, a nine support 525, a ten pulley 526, a five flexible rope 527, a ten pulley 528 and a ten support 529; four first struts 522 are provided, one end of each first strut is fixedly connected to the first upper plate 521, and the other end of each first strut is fixedly connected to the first lower plate 523; the lower plate 523 is provided with a sliding groove four 5231, the power transmission device 524 is installed on the lower plate 523, and the power transmission device 524 comprises a motor six 5241, a gear five 5242, a gear six 5243, a shaft three 5244, a flexible rope four 5245, an eccentric wheel one 5246 and a sliding block five 5247; the motor six 5241 is fixedly connected to the lower plate one 523; the five gear 5242 is arranged on an output shaft of the six motor 5241 through a key; the six gear 5243 is mounted on the third shaft 5244 through a key, and the six gear 5243 is meshed with the five gear 5242; two ends of the shaft III 5244 are respectively mounted on the upper plate I521 and the lower plate I523 through bearings; the first eccentric wheel 5246 is fixedly connected to the third shaft 5244, and a circular groove 52461 is formed in the first eccentric wheel 5246; the flexible rope four 5245 is arranged in the circular groove 52461 of the eccentric wheel one 5246, and two ends of the flexible rope four 5245 are fixedly connected to the sliding block four 5248; the fourth sliding block 5248 is arranged in the fourth sliding groove 5231, and the fourth sliding block 5248 and the first lower plate 523 form a moving pair; the support nine 525 is fixedly connected to the lower plate I523; the pulley ten 526 is arranged on the support nine 525; one end of the five flexible ropes 527 is fixedly connected to the five sliding blocks 5247, and the other end of the five flexible ropes 527 is fixedly connected to the second screening frame 544 by bypassing the ten pulleys 526 and the eleven pulleys 528; the fourth power device 53 comprises a second upper plate 531, a second support column 532, a second lower plate 533, a pushing power device 534 and a pushing device 535; four second support columns 532 are provided, one end of each second support column 532 is fixedly connected to the second upper plate 531, and the other end of each second support column 532 is fixedly connected to the second lower plate 533; the pushing power device 534 is mounted on the second lower plate 533, and the pushing power device 534 comprises a motor seven 5341, a gear seven 5342, a gear eight 5343, a shaft four 5344, an eccentric wheel two 5345, a push rod 5346 and a parallel block 5347; the motor seven 5341 is fixedly connected with the lower plate two 533; the gear seven 5342 is connected to an output shaft of the motor seven 5341 through a key; the eight gear 5343 is arranged on the shaft four 5344 through a key, and the eight gear 5343 is meshed with the seven gear 5342; the shaft IV 5344 is arranged on the upper plate II 531 and the lower plate II 533 through bearings; the eccentric wheel II 5345 is fixedly connected to the shaft IV 5344; the push rod 5346 is in contact with the eccentric wheel II 5345 to form a cam mechanism; the push rod 5346 is arranged in the guide groove III 53471, and the push rod 5346 and the parallel block 5347 form a moving pair; the ejector rod 5346 is fixedly connected to the second movable platform 5351; the parallel block 5347 is fixedly connected to the second upper plate 531; the parallel block 5347 is provided with a guide groove III 53471; the pushing device 535 is installed on the second upper plate 531, and the pushing device 535 comprises a second movable platform 5351, a fixed upright 5352, a guide rod 5353 and a third spring 5354; the second movable platform 5351 is fixedly connected to the movable frame 541; the second movable platform 5351 is provided with a first groove 53511; one end of the fixed upright post 5352 is arranged on the first groove 53511, and the fixed upright post 5352 and the second movable platform 5351 form a moving pair; the other end is fixedly connected to the second upper plate 531; a circular hole II 53521 is formed in the fixed upright stanchion 5352; two guide rods 5353 are provided, one end of each guide rod 5353 is fixedly connected to the second movable platform 5351, and the other end of each guide rod 5353 penetrates through the second circular hole 53521; the second spring 5354 is sleeved on the guide rod 5353, one end of the second spring 5354 is fixedly connected to the second movable platform 5351, and the other end of the second spring 5354 is fixedly connected to the fixed vertical rod 5352; the second screen body 54 is positioned on the fixed platform 51, and the second screen body 54 comprises a moving frame 541, a first support mechanism 542, a second support mechanism 543, a second screening frame 544, a second screen 545 and a first sliding door 546; the movable frame 541 is arranged in the guide groove four 511, and the movable frame 541 and the fixed platform 51 form a moving pair; two groups of first supporting mechanisms 542 are arranged between the moving frame 541 and the second screening frame 544, and the first supporting mechanisms 542 comprise first supporting rods 5421 and second supporting rods 5422; a second groove 54211 is formed in the first support rod 5421; two ends of the first support rod 5421 are respectively connected to the moving frame 541 and the second screening frame 544 through hinges; one end of the second support rod 5422 is connected to the moving frame 541 through a hinge, the other end of the second support rod 5422 is arranged in the second groove 54211, and the second support rod 5422 and the first support rod 5421 form a moving pair; two groups of second supporting mechanisms 543 are arranged between the moving frame 541 and the screening frame 544, and each second supporting mechanism 543 comprises a third supporting rod 5431, a fourth supporting rod 5432 and a fifth hydraulic cylinder 5433; two ends of the supporting rod III 5431 are respectively connected to the moving frame 541 and the screening body II 544 through hinges; a third groove 54311 is formed on the third support rod 5431; one end of the support rod IV 5431 is connected to the moving frame 541 through a hinge, the other end of the support rod IV 5431 is arranged in the groove III 54311, and the support rod IV 5431 and the support rod III 5431 form a moving pair; the hydraulic cylinder five 5433 comprises a cylinder five 54341 and a piston rod five 54342, the cylinder five 54341 is mounted on the movable platform 541 through a hinge, and the piston rod five 54342 is mounted on the rod piece four 5431; the second screening body 544 is positioned above the movable frame 541; the second screening mesh 545 is arranged on a second screening frame 544; the first sliding door 546 is arranged on the second screening rack 544; the second discharging device 55 is fixedly connected to the fixed platform 51; the return device 56 is installed on the machine frame 1, and the return device 56 comprises a weight block 561, a roller 562, an eleven support 563, an six flexible rope 564, a twelve pulley 565, a thirteen pulley 566 and an twelve support 567; the weight block 561 is installed in the vertical groove 111, and the weight block 561 and the I-shaped column I11 form a sliding pair; the roller 562 is arranged on the support eleven 563; the eleven support 562 is fixedly connected to the I-shaped column I11; one end of the flexible rope six 564 is connected to the weight block 561, and the other end of the flexible rope six 564 is connected to the second sieving frame 544 by passing through the roller 562, the pulley twelve 565 and the pulley thirteen 566; the pulley twelve 565 is arranged on the first square hole 112; the pulley thirteen 566 is arranged on the support twelve 567; the support twelve 567 is arranged on the I-shaped column I11; the sliding door device 57 is positioned at one side of the frame 1; the sliding door device 57 comprises a bottom plate 571, a motor eight 572, a gear nine 573, a gear ten 574, a shaft five 575, a rope winder three 576 and a pulling device 577; the bottom plate 571 is fixedly connected to the i-shaped column 11; the motor eight 572 is mounted on the bottom plate 571 through a bolt; the nine gear 573 is mounted on the output shaft of the eight 572 motor through a key; the gear 574 is fixedly connected to the shaft five 575, and the gear 574 is meshed with the gear nine 573; two ends of the fifth shaft 575 are respectively installed on the I-shaped column I11 through bearings; two rope winders three 576 are respectively arranged at two ends of the shaft five 575; two groups of pulling devices 577 are respectively arranged on two sides of the rack 1; the pulling device 577 comprises a fourteen pulley 5771, a fifteen pulley 5772 and a four steel wire 5773; the fourteen pulleys 5771 are arranged on the rectangular box 411; the fifteen 5772 pulley is arranged on the rectangular box 411; one end of the steel wire four 5773 is connected to the rope winder three 576, and the other end of the steel wire four 5773 bypasses the pulley fourteen 5771 and the pulley fifteen 5772 and is fixedly connected to the sliding door one 545.

As shown in fig. 1 and 6, the controller 6 is mounted on the i-shaped column two 12; the second material receiving device 7 comprises a material receiving box 71, a conveying device 72 and a screening net 73; the two material receiving boxes 71 are positioned at the lower end of the screening net 73; the material receiving box 71 comprises a material receiving box body 711, a sliding door II 712, a handle I713, a material pulling plate 714 and a handle II 715; the material receiving box body 711 is positioned below the screening net 73; the second sliding door 712 is arranged on the material receiving box body 711 through a pin; the first handle 713 is fixedly connected to the second sliding door 712; the material pulling plate 714 is arranged in the material receiving box body 711, and the material pulling plate 714 and the material receiving box body 711 form a sliding pair; the second handle 715 is fixedly connected to the material pulling plate 714; the conveying device 72 is positioned between the two material receiving boxes 71, and the conveying device 72 comprises a motor nine 721, a winding drum 722 and a conveying belt 723; the motor nine 721 is arranged on the material receiving box body 711 through a bolt; the winding drum 722 is arranged on an output shaft of the motor nine 721; the conveyer 723 is arranged on the winding drum 722; one end of the screening net 73 is fixedly connected to the material receiving box 711, and the other end is fixedly connected to the fixed platform 51.

When in work: putting the materials into the material box 263, controlling the first motor 221 to start by the controller 6, and driving the first gear 222 to rotate so as to drive the second gear 2231 and the third gear 2241 to rotate simultaneously; thereby driving the first rope winder 2233 arranged on the first shaft 2232 and the second rope winder 2243 arranged on the second shaft 2242 to rotate, tightening the first steel rope 25 and the second steel rope 29, driving the lifting plate 23 to ascend, when the connector 3551 is connected to the interface 2661, the controller 6 controls the second motor 352 to start, drives the fourth gear 353 to rotate, drives the rack 354 meshed with the fourth gear 353 to move, drives the pull rod 355 to move, thereby driving the movable base 261 to move, controls the first hydraulic cylinder 262 to jack up one end of the charging box 263 at the moment, realizes dumping of materials, controls the second motor 352 to rotate reversely, and pushes the movable base 261 back to the lifting plate 23; simultaneously starting a third motor 361 and a fourth motor 371, wherein the third motor 361 drives a first connecting rod 3621 to rotate, a second sliding block 3623 connected to the second connecting rod 3622 is pulled to move, a first flexible rope 365 connected to the second sliding block 3623 is driven to be pulled and fixedly connected to a round rod 367, the third connecting rod 3681 rotates around a fifth support 3682, so that the first sieve body 34 is driven to rotate upwards around a pin 341, at the moment, a third flexible rope 383 connected to a sieve frame 344 is driven to pull a fourth sliding block 382 to move, and the second spring 383 contracts to provide a reaction force for the fourth sliding block 382, so that the first sieve body 34 vibrates upwards and downwards; the fourth motor 371 drives the third sliding block 3723 connected to the fifth connecting rod 3722 connected to the fourth connecting rod 3721 to move, the third sliding block 3723 drives the second flexible rope 379 to pull the screen frame 344 to move in the horizontal direction, and the first spring 343 contracts to provide a counterforce to the screen frame 344, so that the first screen body 34 can vibrate in the horizontal direction; the materials screened for the first time can fall into the collecting box 44, the second hydraulic cylinder 326 is controlled to push the material discharging box 322 connected to the first sliding block 325 to move, when the materials reach the lower part of the first screen 345, a piston rod 3482 of the fourth hydraulic cylinder 348 contracts, the electromagnet 321 attracts a magnetic iron block 349 fixedly connected to the first screen 345, the first screen 344 is pulled to rotate around a circular shaft 346, the materials left on the first screen 345 enter the material discharging box 322, the second hydraulic cylinder 326 drives the material discharging box 322 on the first sliding block 352 to move back to the initial position, the third hydraulic cylinder 327 is controlled to pull the material discharging box 322 downwards, the material discharging box 322 is inclined, meanwhile, the controller 6 controls the lifting plate 23 to move to the front end of the material discharging box 322, and the treatment of the left materials screened for the first time is; the controller 6 controls the motor five 411 to start, drives the screw 413 to drive the uniform distribution box 42 to move, when the uniform distribution box moves to the lower end of the collection box 44, the first electromagnetic gate 45 is opened, the material falls into the uniform distribution box 42, the first electromagnetic gate 45 is closed, the uniform distribution box 42 continues to move, the second electromagnetic gate 46 is opened, the material uniformly falls onto the second screen 545, the motor six 5241 and the motor seven 5341 are started simultaneously, the gear five 5242 is meshed with the gear six 5243, the gear six 5243 is installed on the shaft three 5244, the eccentric wheel one 5246 is installed on the shaft three 5244, the motor six 5241 drives the gear five 5242 to rotate, thereby the first eccentric wheel 5246 is driven to rotate to drive the fifth slider 5247 connected with the fourth flexible rope 5245 to move, the fifth slider 5247 drives the heavy object 561 to move up and down through the fifth flexible rope 527 and the sixth flexible rope 564, the second support rod 5422 is driven to move on the second groove 54211, and the fourth support rod 5432 moves on the third groove 54311, so that two-degree-of-freedom vibration of the second screening frame 544 is realized; the seven gear 5342 is meshed with the eight gear 5343, the eight gear 5343 is mounted on the fourth shaft 5344, the second eccentric wheel 5345 is mounted on the fourth shaft 5344, the seven motor 5341 drives the seven gear 5342 to rotate, so that the second eccentric wheel 5345 is driven to rotate, the eccentric wheel 5345 pushes the moving frame 541 connected to the second movable platform 5351 to move, the third spring 5354 gives a reaction force to the second movable platform 5351, so that the second sieving frame 544 can vibrate in one degree of freedom, after the second sieving is completed, the materials fall on the conveying device 72 below along the sieving net 73, one part of the materials enter the material receiving box 71 through the sieve holes, the second sliding door 712 can be opened, and the second handle 715 is pulled to pull out the material pulling plate 714; the hydraulic cylinder five 5433 pulls the support rod four 5432 to move, so that the screening frame two 544 inclines, at the moment, the motor eight 572 is started to drive the gear ten 574 meshed with the gear nine 573 to rotate, the shaft five 575 is driven to rotate to drive the rope winder three 576 fixedly connected to the shaft five 575 to rotate, the sliding door one 546 connected to the steel rope four 5773 is pulled up to move upwards, so that the residual materials subjected to secondary screening enter the charging box 263 along the discharging device two 55, the collection of the residual materials subjected to secondary screening is completed, and the screening is finished.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an accurate vibration screening plant of adjustable multilayer which characterized in that: the automatic material receiving machine comprises a rack, a feeding device, a first screening device, a first material receiving device, a second screening device, a controller and a second material receiving device, wherein the rack consists of a first I-shaped column, a second I-shaped column and a connecting column; the number of the connecting columns is three, wherein two connecting columns are fixedly connected between the I-shaped column I and the I-shaped column II, and the other connecting column is fixedly connected to the I-shaped column II; the feeding device is positioned on one side of the rack; the screening device is positioned above the material receiving device I; the first material receiving device is positioned above the second screening device; the second screening device is positioned on the rack; the controller is arranged on the frame; the second material receiving device is positioned below the second screening device;

the I-shaped column I is provided with a vertical groove and a square hole I; the feeding device consists of a lower base, a power device I, a lifting plate, an upright post, a steel rope I, a movable platform I, a pulley block, an upper cover plate and a steel rope II; the first power device comprises a first motor, a first gear, a first rope winding group and a second rope winding group; the first motor is arranged on the lower base through a bolt; the first gear is arranged on an output shaft of the first motor through a key; the first rope winding group is arranged on the lower base and comprises a gear II, a shaft I, a first rope winder and a support I; the second gear is arranged on the first shaft through a key and meshed with the first gear; the first shaft is arranged on the first support through a bearing; the first rope winder is fixedly connected to the first shaft; the first support is fixedly connected to the lower base; the rope winding group II is arranged on the lower base and comprises a gear III, a shaft II, a rope winder II and a support II; the third gear is arranged on the second shaft through a key and meshed with the first gear; the shaft II is arranged on the support II through a bearing; the second rope winder is fixedly connected to the second shaft; the second support is fixedly connected to the lower base; the lifting plate is provided with a first sliding groove; four upright columns are arranged, one end of each upright column is fixedly connected to the lower base, and the other end of each upright column is fixedly connected to the upper cover plate; two steel ropes are arranged on the two sides of the upper cover plate respectively; one end of the first steel rope is connected to the lifting plate, and the other end of the first steel rope is fixedly connected to the first rope winder by bypassing the first pulley; the first movable platform is positioned on the lifting plate and comprises a movable base, a first hydraulic cylinder and a loading box; the movable base is arranged in the first sliding groove, and the movable base and the lifting plate form a moving pair; the movable base is provided with an interface; the first hydraulic cylinder comprises a first cylinder body and a first piston rod; the first cylinder body is arranged on the movable base; the first piston rod is fixedly connected with the charging box; the charging box is arranged on the movable base through a pin; the pulley blocks are arranged at two sides of the upper cover plate respectively and comprise a first pulley and a second pulley; the first pulley is arranged on the upper cover plate; the second pulley is arranged on the upper cover plate; two steel ropes are arranged and are respectively positioned on two sides of the upper cover plate; one end of the second steel rope is fixedly connected to the lifting plate, and the other end of the second steel rope is fixedly connected to the second rope winder by bypassing the second pulley;

the first material receiving device consists of a power device II, uniformly distributed boxes, a supporting frame, a collecting box, an electromagnetic door I and an electromagnetic door II; two groups of power devices are arranged on the rack, and each power device comprises a rectangular box, a motor five and a screw rod; the rectangular box is fixedly connected to the frame; the rectangular box is provided with a square groove IV; the motor V is arranged on the I-shaped column II; the screw rod is arranged on the rectangular box through a bearing and is connected to an output shaft of the motor V; the uniformly distributed boxes are fixedly connected to the screw rod; the supporting frame is provided with a square groove III and a square hole II; the support frame is fixedly connected to the rectangular box; the collecting box is arranged on the supporting frame; the first electromagnetic door is arranged on the collecting box; and the second electromagnetic door is arranged on the uniformly distributed boxes.

2. An adjustable multi-deck precision vibratory screening apparatus as set forth in claim 1 wherein: the second screening device consists of a fixed platform, a third power device, a fourth power device, a second screen body, a second discharging device, a return device and a sliding door device; the fixed platform is fixedly connected to the rack; the power device III comprises an upper plate I, a support I, a lower plate I, a power transmission device, a support nine, a pulley ten, a flexible rope five and a support ten; one end of each strut is fixedly connected to the upper plate I, and the other end of each strut is fixedly connected to the lower plate I; the first lower plate is provided with a sliding groove IV, the power transmission device is arranged on the first lower plate and comprises a motor VI, a gear V, a gear VI, a shaft III, a flexible rope IV, an eccentric wheel I and a slide block V; the motor six is fixedly connected to the lower plate I; the fifth gear is arranged on an output shaft of the sixth motor through a key; the sixth gear is arranged on the third shaft through a key and meshed with the fifth gear; two ends of the third shaft are respectively arranged on the first upper plate and the first lower plate through bearings; the first eccentric wheel is fixedly connected to the third shaft and provided with a circular groove; the flexible rope IV is arranged in a circular groove of the eccentric wheel I, and two ends of the flexible rope IV are fixedly connected to the slide block V; the fifth sliding block is arranged in the fourth sliding groove, and the fifth sliding block and the first lower plate form a sliding pair; the support seat nine is fixedly connected to the lower plate I; the pulley ten is arranged on the support nine; one end of the flexible rope five is fixedly connected to the sliding block five, and the other end of the flexible rope five bypasses the pulley ten and the pulley eleven and is fixedly connected to the screening frame two; the power device IV comprises an upper plate II, a support II, a lower plate II, a pushing power device and a pushing device; four second support columns are arranged, one end of each second support column is fixedly connected to the second upper plate, and the other end of each second support column is fixedly connected to the second lower plate; the pushing power device is arranged on the second lower plate and comprises a motor seven, a gear eight, a shaft four, an eccentric wheel two, an ejector rod and a parallel block; the motor seven is fixedly connected to the lower plate II; the gear seven is connected to an output shaft of the motor seven through a key; the gear eight is arranged on the shaft four through a key and meshed with the gear seven; the shaft four-way is arranged on the upper plate II and the lower plate II through bearings; the eccentric wheel II is fixedly connected to the shaft IV; the ejector rod is contacted with the eccentric wheel to form a cam mechanism; the ejector rod is arranged in the third guide groove, and the ejector rod and the parallel block form a moving pair; the ejector rod is fixedly connected to the second movable platform; the parallel blocks are fixedly connected to the second upper plate; the parallel block is provided with a third guide groove; the pushing device is arranged on the second upper plate and comprises a movable platform II, a fixed vertical rod, a guide rod and a spring III; the second movable platform is fixedly connected to the movable frame; a first groove is formed in the second movable platform; one end of the fixed vertical rod is arranged on the first groove, and the fixed vertical rod and the movable platform II form a moving pair; the other end is fixedly connected to the second upper plate; a second round hole is formed in the fixed vertical rod; two guide rods are arranged, one end of each guide rod is fixedly connected to the second movable platform, and the other end of each guide rod penetrates through the second round hole; the second spring is sleeved on the guide rod, one end of the second spring is fixedly connected to the second movable platform, and the other end of the second spring is fixedly connected to the fixed vertical rod; the second screen body is positioned on the fixed platform and comprises a moving frame, a first supporting mechanism, a second screening frame, a second screen and a first sliding door; the movable frame is arranged in the guide groove IV, and the movable frame and the fixed platform form a movable pair; the first support mechanism is provided with two groups which are both arranged between the moving frame and the second screening frame, and the first support mechanism comprises a first support rod and a second support rod; a second groove is formed in the first support rod; two ends of the first supporting rod are respectively connected to the moving frame and the screening frame II through hinges; one end of the second supporting rod is connected to the moving frame through a hinge, the other end of the second supporting rod is installed in the second groove, and the second supporting rod and the first supporting rod form a moving pair; two groups of support mechanisms are arranged between the moving frame and the screening frame II, and each support mechanism II comprises a support rod III, a support rod IV and a hydraulic cylinder V; two ends of the supporting rod III are respectively connected to the moving frame and the sieve body II through hinges; a third groove is formed in the third support rod; one end of the support rod IV is connected to the moving frame through a hinge, the other end of the support rod IV is arranged in the groove III, and the support rod IV and the support rod III form a moving pair; the hydraulic cylinder five comprises a cylinder body five and a piston rod five, the cylinder body five is mounted on the moving platform through a hinge, and the piston rod five is mounted on the support rod four; the second screening body is positioned above the moving frame; the second screen is arranged on the second screening frame; the first sliding door is arranged on the second screening frame; the second discharging device is fixedly connected to the fixed platform; the return device is arranged on the rack and comprises a weight block, a roller, a support eleven, a flexible rope six, a pulley twelve, a pulley thirteen and a support twelve; the weight block is arranged in the vertical groove, and the weight block and the I-shaped column I form a moving pair; the roller is arranged on the support eleven; the eleven support seats are fixedly connected to the first I-shaped column; one end of the flexible rope six is connected to the heavy object block, and the other end of the flexible rope six is connected to the screening frame two by bypassing the roller, the pulley twelve and the pulley thirteen; the pulley twelve is arranged on the square hole I; the pulley thirteen is arranged on the support twelve; the support twelve is arranged on the I-shaped column I; the sliding door device is positioned on one side of the frame; the sliding door device comprises a bottom plate, an eight motor, a nine gear, a ten gear, a five shaft, a three rope winder and a pulling device; the bottom plate is fixedly connected to the I-shaped column; the motor eight is arranged on the bottom plate through a bolt; the gear nine is arranged on an output shaft of the motor eight through a key; the gear ten is fixedly connected to the shaft five and meshed with the gear nine; two ends of the fifth shaft are respectively installed on the first I-shaped column through bearings; the two rope winders are respectively arranged at two ends of the shaft V; the two groups of pulling devices are respectively arranged on two sides of the rack; the pulling device comprises a fourteen pulley, a fifteen pulley and a four steel rope; the pulley fourteen is arranged on the rectangular box; the pulley fifteen is arranged on the rectangular box; one end of the steel rope IV is connected to the rope winder III, and the other end of the steel rope IV bypasses the pulley fourteen and the pulley fifteen to be fixedly connected to the sliding door I.

3. An adjustable multi-deck precision vibratory screening apparatus as set forth in claim 1 wherein: the controller is arranged on the I-shaped column II; the second material receiving device comprises a material receiving box, a conveying device and a screening net; the two material receiving boxes are positioned at the lower end of the screening net; the material receiving box comprises a material receiving box body, a sliding door II, a handle I, a material pulling plate and a handle II; the material receiving box body is positioned below the screening net; the sliding door II is arranged on the material receiving box body through a pin; the first handle is fixedly connected to the second sliding door; the material pulling plate is arranged in the material receiving box body, and the material pulling plate and the material receiving box body form a moving pair; the second handle is fixedly connected to the material pulling plate; the conveying device is positioned between the two material receiving boxes and comprises a motor nine, a winding drum and a conveying belt; the motor nine is arranged on the material receiving box body through a bolt; the winding drum is arranged on an output shaft of the motor nine; the conveyer belt is arranged on the winding drum; one end of the screening net is fixedly connected to the material receiving box body, and the other end of the screening net is fixedly connected to the fixed platform.