CN209953224U

CN209953224U - High-efficient environmental protection solid material multi-screen cloth composite screening mechanism

Info

Publication number: CN209953224U
Application number: CN201920566386.0U
Authority: CN
Inventors: 宋恒彬; 杨永川; 卢克银; 宋文涛
Original assignee: Jiaozuo Hengbo Technology Co Ltd
Current assignee: Jiaozuo Hengbo Technology Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-01-17
Anticipated expiration: 2029-04-24

Abstract

The utility model relates to a high-efficient environmental protection solid material multi-screen cloth composite screening mechanism, including bearing frame, water conservancy diversion chute, sieve case, bearing beam, intensive gusset, selection sieve piece, transition sieve piece, case lid, damper, excitation mechanism and control system, sieve case up end and case lid interconnect, bearing beam inlays in the sieve incasement, and intensive gusset inlays in the sieve incasement, and selection sieve piece inlays in the sieve incasement, and upper and lower distribution and with intensive gusset interconnect, every selection sieve piece top all establishes a transition sieve piece. The utility model discloses the work efficiency of improvement screening operation that can be very big improves integration, modularization and the degree of automation of screening system, in addition can be very big improvement material self kinetic energy and screening plant drive kinetic energy comprehensive utilization when moving to can effectively reduce the solid material and cause dust pollution when flowing.

Description

High-efficient environmental protection solid material multi-screen cloth composite screening mechanism

Technical Field

The utility model relates to a high-efficient environmental protection solid material multi-screen cloth composite screening mechanism belongs to and people's technical field.

Background

At present, when solid materials such as ores and the like are classified according to the particle diameter, the classification operation is usually carried out by utilizing a screening system formed by a screening mechanism with a traditional structure, such as a probability screen, a bar screen and the like, and the currently used screening equipment can meet the requirement of screening the solid materials to a certain extent during operation, but the current traditional screening mechanism has a complex structure and relatively large equipment structure volume and dead weight, and one screening equipment usually only screens the materials with a specific particle structure, so that the screening operation efficiency is low, and the requirement of screening the materials with different types can be met by synchronous operation of a plurality of equipment, so that the operation energy consumption of the current traditional screening system during actual operation is relatively large, the difficulty of the equipment operation and maintenance operation is large, the cost is high, and the equipment installation and positioning need to occupy a large installation space, the screening device is easy to be limited by the environment of the use site, the construction cost of the use site is high, the space utilization rate is low, and the cost of the operation such as use and maintenance of the current screening device is increased.

Meanwhile, when the traditional screening mechanism is used for screening materials, although the materials are driven to pass through the screening mechanism by the dead weight and inertia of the materials through a certain inclination angle, the included angle between the flow direction of the materials and the horizontal plane is lack of scientific design, so that the utilization rate of the kinetic energy of the solid materials is insufficient when the materials are screened, equipment between the solid materials and the screening sheets, box plates and other structures of the screening mechanism and the friction loss between the materials are serious, the phenomenon of noise pollution caused by friction is serious, the running energy consumption of the screening mechanism on the material oscillation screening is increased, the situation that the structure of the screening mechanism is damaged due to overlarge load is easy to happen, and the running stability, the reliability, the service life and the use and maintenance cost of the screening mechanism are seriously influenced.

In addition, current screening mechanism is when screening the operation to solid material, because of factors such as equipment oscillation, the high-speed flow of material, very easily leads to solid material to produce serious dust pollution, when causing the material extravagant, causes serious pollution to operational environment in addition, consequently leads to the current operational environment when carrying out solid material screening operation relatively abominable, causes serious threat to staff's health, also leads to simultaneously to investing into higher cost and carries out solid dust pollution and administer.

Therefore, in order to meet the actual application requirement, a new solid material screening mechanism is urgently needed to be developed.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the utility model provides a high-efficient environmental protection solid material multi-screen cloth composite screening mechanism.

In order to realize the above-mentioned effect, the multi-screen composite screening mechanism for the high-efficiency environment-friendly solid materials is provided, and has the advantages of being high in integration, modularization and automation degree of a screening system, simple in structure and small in self weight, the operation stability of the screening system can be effectively improved, the friction loss of equipment is reduced, the equipment is caused, dust pollution is caused, the requirement of screening operation of various different types of materials can be effectively met through one equipment, and the working efficiency of screening operation is greatly improved.

In order to achieve the above purpose, the present invention is realized by the following technical solution:

a high-efficiency environment-friendly multi-screen composite screening mechanism for solid materials comprises a bearing frame, a flow guide chute, a screen box, a bearing cross beam, a reinforcing rib plate, a material selecting screen plate, a transition screen plate, a box cover, a damping mechanism, an excitation mechanism and a control system, wherein the screen box is of a U-shaped cross section, a groove-shaped structure with a trapezoidal axial cross section, an upper end surface of the screen box is connected with the box cover to form a closed cavity structure, a lower end surface of the screen box is connected with the bearing frame through a plurality of damping mechanisms, an included angle of 25-45 degrees is formed between the axis of the screen box and the horizontal plane, a feed inlet is arranged on the upper end surface of the screen box, a large material discharge port, a medium material discharge port, a small material discharge port and a base material discharge port are sequentially arranged on the lower end surface of the screen box from top to bottom along the vertical direction, a return mineral material discharge port, the feed inlet, the large material discharge port, at least two bearing beams embedded in the screen box, two ends of each bearing beam are respectively connected with the side wall of the screen box, the bearing beams are uniformly distributed along the axial direction of the screen box and are mutually vertical to the axial line of the screen box, at least two reinforcing rib plates are embedded in the screen box and are mutually connected with the bearing beams and are vertically distributed, each reinforcing rib plate is uniformly distributed along the axial direction of the bearing beams, a plurality of material selecting screen sheets are embedded in the screen box and are distributed in parallel to the axial line of the screen box, each material selecting screen sheet is distributed from top to bottom and is mutually connected with the reinforcing rib plates, at least one material selecting screen sheet is arranged in the screen box corresponding to the large material discharge port, the medium material discharge port, the small material discharge port and the bedding material discharge port, and the corresponding material selecting screen sheets respectively form a screening cavity, the front end face of each material selecting screen sheet is positioned behind the feed port, and the number of transition screen sheets is consistent with the number of the material selecting screen sheets, the transition sieve sheet is arranged above each material selecting sieve sheet, the distance between each transition sieve sheet and the adjacent material selecting sieve sheet is not less than 10 cm, and the transition sieve sheet and the axis of the adjacent material selecting sieve sheet form an included angle of 0-30 degrees, the front half part of each transition sieve sheet is positioned under the feed inlet, the rear half part of each transition sieve sheet is positioned above the material selecting sieve sheet, the length of the transition sieve sheet positioned above the material selecting sieve sheet is not less than 10 cm, at least two vibration excitation mechanisms are distributed along the axis direction of the sieve box and are connected with the outer surface of the bottom of the sieve box and are vertically distributed with the axis of the sieve box, and the control system is positioned on the outer surface of the bearing frame and is respectively and electrically connected with each vibration excitation mechanism.

Further, bear the frame including bearing fossil fragments, drainage fan, water conservancy diversion tuber pipe, dust collector, wherein bear the keel for the cross section be the frame construction of rectangle, a plurality of damper of its up end equipartition and through damper and sieve case terminal surface interconnect under with, dust collector at least one inlays in bearing fossil fragments and lies in the sieve case under, drainage fan at least one, and bear fossil fragments surface interconnect to communicate each other with dust collector and each water conservancy diversion chute respectively through the water conservancy diversion tuber pipe, just the water conservancy diversion tuber pipe is connected with water conservancy diversion chute up end, and water conservancy diversion chute and water conservancy diversion tuber pipe hookup location department establish the return air inlet, drainage fan, dust collector all with control system electrical connection.

Furthermore, the diversion chute is a tubular mechanism with a cross section in any one of a rectangle, a circle and a regular polygon, a plurality of electrostatic electrodes are uniformly distributed in the diversion chute, the electrostatic electrodes are connected with the upper end face of the diversion chute and vertically distributed with the upper end face of the diversion chute, and the electrostatic electrodes are mutually connected in parallel and electrically connected with a control system.

Furthermore, the damping mechanism comprises two bearing seats, a main bearing spring, an auxiliary bearing spring, an elastic cushion block and a pressure sensor, wherein the two bearing seats are of a groove-shaped structure with a U-shaped shaft end, the two bearing seats are connected with each other through the main bearing spring and the auxiliary bearing spring and are coaxially distributed, the effective lengths 1/4-1/2 of the main bearing spring and the auxiliary bearing spring are respectively embedded in the two bearing seats, the outer diameter of the main bearing spring is the same as the inner diameter of the bearing seats, the outer surface of the main bearing spring is abutted against and slidably connected with the inner surface of the side wall of the bearing seats, the auxiliary bearing spring is embedded in the main bearing spring, the outer diameter of the auxiliary bearing spring is 1/3-2/3 of the inner diameter of the main bearing spring, and the spiral directions of the main bearing spring and the auxiliary bearing spring are opposite, the two elastic cushion blocks are respectively embedded in the two bearing seats and coaxially distributed with the bearing seats, the elastic cushion blocks are additionally embedded in the auxiliary pressure bearing springs and are mutually connected with the inner surfaces of the auxiliary pressure bearing springs in a sliding manner, the elastic cushion blocks exceed the front end surfaces of the bearing seats by at least 5 mm, the distance between the elastic cushion blocks in the two bearing seats is 1/5-3/4 of the distance between the two bearing seats, the two pressure sensors are respectively embedded in the front end surfaces of the two elastic cushion blocks and coaxially distributed with the elastic cushion blocks, and the pressure sensors are additionally electrically connected with a control system.

Furthermore, the bottom of the sieve box is provided with a grid plate, the grid plate is positioned in the sieve box and distributed in parallel with the bottom of the sieve box, and the axis of grid holes of the grid plate is vertical to the axis of the sieve box.

Furthermore, in the material selecting sieve sheets, the front end face of each material selecting sieve sheet is positioned behind the feeding hole, and the front end face of the material selecting sieve sheet positioned below in the two adjacent material selecting sieve sheets exceeds the front end face of the material selecting sieve sheet positioned above by at least 10 cm.

Furthermore, in the transition screen plate, the length of the transition screen plate positioned right below the feed inlet is 1/3-2/3 of the total length of the transition screen plate.

Furthermore, the vibration excitation mechanism is provided with at least two vibration sensors which are uniformly distributed along the axis of the screen box, and the detection axis of each vibration sensor is perpendicular to and intersected with the axis of the vibration excitation mechanism.

Furthermore, the control system is a circuit system based on an industrial computer, and at least one serial port communication circuit and at least one internet-of-things controller are additionally arranged in the control system.

The utility model discloses more traditional screening system has following advantage:

1. the working efficiency of screening operation can be greatly improved, the integration, modularization and automation degree of the screening system are improved, the structure of the screening system is effectively simplified, the dead weight of the screening system is reduced, the operation energy consumption, the construction and maintenance cost of the screening system are reduced, and the space utilization rate of the screening system is effectively improved;

2. the efficiency of material screening operation can be effectively improved, the comprehensive utilization rate of the self kinetic energy of the material and the driving kinetic energy of the screening device during operation is greatly improved, the efficiency and the quality of the material screening operation are improved, the abrasion and the noise pollution between the operation material of the screening device and the equipment are effectively reduced, and the damage of the structure of the screening device caused by overlarge oscillation load is avoided, so that the stability and the reliability of the novel operation are further improved, the service life is prolonged, and the use and maintenance cost is reduced;

3. in the operation process, can realize carrying out the classified collection to different grade type materials in multiple simultaneously to at material screening in-process, cause dust pollution when effectively reducing the solid material flow, very big improvement the utility model discloses an environmental protection performance improves operational environment and helps reducing the material and collect, prevents that the material from managing the cost and the degree of difficulty of operation to the production environment because of the extravagant phenomenon of material that dust pollution caused and reduction material screening operation.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;

FIG. 1 is a schematic diagram of the novel structure;

FIG. 2 is a schematic structural diagram of an excitation mechanism;

fig. 3 is a partial structure schematic diagram of the connection relationship between the diversion chute and the electrostatic electrode.

Detailed Description

For making the utility model discloses the technological means, creation characteristic, achievement purpose and efficiency that realize are easily under construction, combine specific implementation below, further explain the utility model discloses.

As shown in figures 1-3, the high-efficiency environment-friendly multi-screen composite screening mechanism for solid materials comprises a bearing frame 1, a flow guide chute 2, a screen box 3, a bearing cross beam 4, a reinforcing rib plate 5, a material selection screen sheet 6, a transition screen sheet 7, a box cover 8, a damping mechanism 9, an excitation mechanism 10 and a control system 11, wherein the screen box 3 is of a U-shaped cross section, is of a trapezoidal groove-shaped structure in axial section, the upper end surface of the screen box is connected with the box cover 8 to form a closed cavity structure, the lower end surface of the screen box is connected with the bearing frame 1 through a plurality of damping mechanisms 9, the axial line of the screen box 3 forms an included angle of 25-45 degrees with the horizontal plane, a feed inlet 101 is formed in the upper end surface position, a large material discharge port 102, a medium material discharge port 103, a small material discharge port 104 and a backing material discharge port 105 are sequentially arranged in the vertical direction from top to bottom, a mineral material, The large material discharge port 102, the medium material discharge port 103, the small material discharge port 104, the bedding material discharge port 105 and the return mineral material discharge port 106 are communicated with a diversion chute 2, at least two bearing beams 4 are embedded in the screen box 4, two ends of the bearing beams are respectively connected with the side wall of the screen box 4, the bearing beams 4 are uniformly distributed along the axial direction of the screen box 3 and are vertical to the axial line of the screen box 3, at least two reinforcing rib plates 5 are embedded in the screen box 3 and are mutually connected with the bearing beams 4 and are vertically distributed, each reinforcing rib plate 5 is uniformly distributed along the axial direction of the bearing beam 4, a plurality of material selecting screen plates 6 are embedded in the screen box 3 and are distributed parallel to the axial line of the screen box 3, each material selecting screen plate 6 is distributed from top to bottom and is mutually connected with the reinforcing rib plates 5, and at least one material selecting screen plate 6 is arranged in the screen box 3 corresponding to the large material discharge port 102, the medium material discharge port 103, the large material discharge port 102, the medium material discharge port 103, the small material discharge port 104, the paving material discharge port 105 and the corresponding material selection screen sheets 6 respectively form a screening cavity 107, the front end face of each material selection screen sheet 6 is positioned behind the feed port 101, the number of the transition screen sheets 6 is consistent with that of the material selection screen sheets 6, a transition screen sheet 7 is arranged above each material selection screen sheet 6, the space between each transition screen sheet 7 and the adjacent material selection screen sheet 6 is not less than 10 cm, and forms an included angle of 0-30 degrees with the axial line of the adjacent material selection screen sheet 6, in the transition screen sheet 7, the front half part of each transition screen sheet 7 is positioned under the feed port 101, the rear half part is positioned above the material selection screen sheet 6, and the length of the transition screen sheet 7 positioned above the material selection screen sheet 6 is not less than 10 cm, at least two vibration excitation mechanisms 10 are distributed along the axial line direction of the screen box 3, are connected with the outer surface of the bottom of the screen box 3 and are vertically distributed with the axial line of the, the control system 11 is located on the outer surface of the bearing frame 1 and is electrically connected with each excitation mechanism 10.

The bearing frame 1 comprises a bearing keel 110, a drainage fan 111, a diversion air pipe 112 and a dust removal device 113, wherein the bearing keel 110 is of a rectangular frame structure with a cross section, a plurality of damping mechanisms 9 are uniformly distributed on the upper end surface of the bearing keel and are connected with the lower end surface of a screen box 3 through the damping mechanisms 9, at least one dust removal device 113 is embedded in the bearing keel 110 and is positioned under the screen box 3, at least one drainage fan 111 is connected with the outer surface of the bearing keel 110 and is communicated with the dust removal device 113 and each diversion chute 2 through the diversion air pipe 112, the diversion air pipe 112 is connected with the upper end surface of the diversion chute 2, a return air inlet 114 is arranged at the connecting position of the diversion chute and the diversion air pipe 112, and the drainage fan 111 and the dust removal device 113 are electrically connected with a control system 11.

Meanwhile, the diversion chute 2 is a tubular mechanism with a cross section in any one of a rectangle, a circle and a regular polygon, a plurality of electrostatic electrodes 12 are uniformly distributed in the diversion chute 2, the electrostatic electrodes 12 are connected with the upper end face of the diversion chute 2 and vertically distributed with the upper end face of the diversion chute 2, and the electrostatic electrodes 12 are mutually connected in parallel and electrically connected with the control system 11.

It should be emphasized that the damping mechanism 9 includes two bearing seats 91, a main bearing spring 92, an auxiliary bearing spring 93, an elastic pad 94 and a pressure sensor 95, wherein the two bearing seats 91 are all groove-shaped structures with a u-shaped axial end, the two bearing seats 91 are connected and coaxially distributed through the main bearing spring 92 and the auxiliary bearing spring 93, the effective lengths 1/4-1/2 of the main bearing spring 92 and the auxiliary bearing spring 93 are respectively embedded in the two bearing seats 91, the outer diameter of the main bearing spring 92 is the same as the inner diameter of the bearing seat 91, the outer surface of the main bearing spring 92 abuts against and is slidably connected with the inner surface of the side wall of the bearing seat 91, the auxiliary bearing spring 93 is embedded in the main bearing spring 92, and the outer diameter of the auxiliary bearing spring 93 is 1/3-2/3 of the inner diameter of the main bearing spring 92, the main pressure-bearing spring 92 and the auxiliary pressure-bearing spring 93 have opposite spiral directions, two elastic cushion blocks 94 are respectively embedded in the two bearing seats 91 and are coaxially distributed with the bearing seats 91, the elastic cushion blocks 94 are additionally embedded in the auxiliary pressure-bearing spring 93 and are mutually connected with the inner surface of the auxiliary pressure-bearing spring 93 in a sliding manner, the elastic cushion blocks 94 exceed the front end surfaces of the bearing seats 91 by at least 5 mm, the distance between the elastic cushion blocks 94 in the two bearing seats 91 is 1/5-3/4 of the distance between the two bearing seats 91, two pressure sensors 95 are respectively embedded in the front end surfaces of the two elastic cushion blocks 94 and are coaxially distributed with the elastic cushion blocks 94, and the pressure sensors 95 are further electrically connected with the control system 11.

Further preferably, the bottom of the sieve box 3 is provided with a grid plate 13, the grid plate 13 is positioned in the sieve box 3 and is distributed in parallel with the bottom of the sieve box 3, and the grid holes of the grid plate 13 are distributed vertically to the axis of the sieve box.

It is important to point out that in the material selecting screen pieces 6, the front end face of each material selecting screen piece 6 is located behind the feeding port 101, the front end face of the material selecting screen piece 6 located below in the two adjacent material selecting screen pieces 6 exceeds the front end face of the material selecting screen piece 6 located above by at least 10 cm, and the length of the transition screen piece 7 located right below the feeding port 101 in the transition screen piece 7 is 1/3-2/3 of the total length of the transition screen piece 7.

In addition, the excitation mechanism 10 is provided with at least two oscillation sensors 14, the oscillation sensors 14 are uniformly distributed along the axis of the screen box 3, and the detection axis of the oscillation sensors 14 is perpendicular to and intersects with the axis of the excitation mechanism 10.

In this embodiment, the control system 11 is a circuit system based on an industrial computer, and the control system is further provided with at least one serial communication circuit and at least one internet-of-things controller, and the control system is further provided with at least one excitation mechanism operating driving sub-circuit based on any one or two of an ac frequency converter or at least one dc speed regulator.

When the utility model is operated, firstly, the bearing frame, the diversion chute, the screen box, the bearing beam, the reinforced rib plate, the material selecting screen sheet, the transition screen sheet, the box cover, the damping mechanism, the excitation mechanism and the control system which form the utility model are assembled, then the assembled novel device is arranged at a designated working position through a bearing frame, and finally the novel control system is electrically connected with an external power circuit and remote control equipment, thereby completing the novel device, wherein when being right this novel assembly operation, pass through water conservancy diversion chute and outside material conveying system intercommunication with this neotype feed inlet, big material discharge gate, middlings discharge gate, small powder discharge gate, bedding material discharge gate and return fines discharge gate and pass through water conservancy diversion chute and outside corresponding material transport or collection system intercommunication, can accomplish the novel equipment of cost.

In the operation process, the materials enter the screen box from the feeding hole through the diversion chute, and a certain included angle is formed between the screen box and the horizontal plane, so that the materials are driven by the inertia effect that the material conveying mechanism provides driving force for the materials under the action of self gravity, meanwhile, the materials are driven by the real power generated by the screen box under the driving of the excitation mechanism, so that the materials pass through the screen box at high speed, and the material selection screen pieces and the transition screen pieces in the screen box screen the physical materials when passing through the screen box, so that the screened materials are respectively discharged through the large material discharging hole, the medium material discharging hole, the small material discharging hole, the bottom material paving discharging hole and the return mineral material discharging hole, and the aim of performing multi-stage screening operation on the materials is fulfilled.

When materials enter a screen box and pass through a material selection screen sheet and a transition screen sheet for screening operation, the materials firstly fall onto the transition screen sheet for flow guide screening, large-particle materials after primary screening fall onto a material selection screen sheet below the transition screen sheet for material screening, and part of smaller-particle materials after flow guide screening of the transition screen sheet directly fall onto a transition screen sheet of the next stage and are subjected to flow guide screening by the transition screen sheet, so that the materials are guided before falling into a material selection screen for formal screening, and the materials are subjected to flow guide screening by the transition screen sheet, on one hand, the effective distance of the materials from an available falling body under the action of driving force can be effectively increased through an included angle between the transition screen sheet and the material selection screen sheet, and therefore, when the materials fall onto a material selection screen sheet through the transition screen sheet, the falling points of solid material particles and the materials with larger self weight are separated from a large material discharge port at the tail end of the screen box, The closer the middle material discharge port, the small material discharge port and the bedding material discharge port are, the more the initial screening and separation of the falling points on the material re-selection sieve plate can be realized according to the material particles and the dead weight, and the screening path of the material through the material selection sieve plate can be shortened according to the solid particles and the dead weight, so that the material screening efficiency can be improved, the thickness and the dead weight of the material layer on the material selection sieve plate can be effectively reduced, and the energy consumption and the abrasion of the screening operation can be reduced; on the other hand accessible transition sieve piece and the contained angle between the selection material sieve piece, effectively reduce the impact force of solid material falling into the selection material sieve piece, and can be according to the solid material granule and its whereabouts of the material that dead weight is bigger apart from the terminal big material discharge gate of sieve case, well material discharge gate, the small powder discharge gate, this characteristic is more close to bedding material discharge gate position, effectively realize that solid material is comparatively even to fall into the selection material sieve piece, it falls into in the last fixed range of selection material sieve piece and causes selection material sieve piece local wear and the serious defect of impact damage to have alone the transmission screening equipment material, thereby at very big low equipment operation wear loss, when the serious influence equipment operating stability condition takes place such as impact loss, effective extension equipment life reduces the equipment maintenance cost.

In addition, when solid materials are screened by the material selecting sieve sheet, the solid materials meeting the screening requirement of the current material selecting sieve sheet flow along the layer of material selecting sieve sheet and are discharged from corresponding positions in a large material discharge port, a medium material discharge port, a small material discharge port and a bedding material discharge port corresponding to the material selecting sieve sheet to complete screening, and the solid materials with the particle size smaller than the screening requirement of the current material selecting sieve sheet fall into the next layer of material selecting sieve sheet to be screened until the materials finally fall into the stroke return mineral aggregate at the bottom of the sieve box and are discharged from the return mineral aggregate discharge port.

When the material contacts with the bottom of the screen box, the grid plate grids at the bottom of the screen box can store part of the material into the grid holes of the grid plate grids, and the material layer rubs with the material falling into the screen box, so that the friction between the material and the screen box is effectively prevented, and the abrasion of the material to the screen box is greatly reduced.

Simultaneously, carrying out the material screening process, the material that enters into the sieve incasement and from sieve case exhaust material often all can produce a large amount of dust pollution, this novel electrostatic electrode in the accessible water conservancy diversion chute of one side concentrates the dust fixed, prevents the dust diffusion, and on the other hand accessible drainage fan purifies in carrying to dust collector with the dust in the water conservancy diversion chute to when effectively eliminating dust pollution, can effectively prevent in addition to lead to the extravagant phenomenon of material because of dust pollution.

3. in the operation process, can realize carrying out the classified collection to different grade type materials in multiple simultaneously to at material screening in-process, cause dust pollution when effectively reducing the solid material flow, very big improvement the utility model discloses an environmental protection performance improves operational environment and helps reducing the material and collect, prevents that the material from managing the cost and the degree of difficulty of operation to the production environment because of the extravagant phenomenon of material that dust pollution caused and reduction material screening operation. The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a many screens of high-efficient environmental protection solid material compound screening mechanism which characterized in that: the high-efficiency environment-friendly solid material multi-screen composite screening mechanism comprises a bearing frame, a flow guide chute, a screen box, a bearing cross beam, a reinforcing rib plate, a material selecting screen plate, a transition screen plate, a box cover, a damping mechanism, an excitation mechanism and a control system, wherein the screen box is of a U-shaped cross section, a groove-shaped structure with a trapezoidal axial cross section, an upper end surface of the screen box is connected with the box cover and forms a closed cavity structure, a lower end surface of the screen box is connected with the bearing frame through a plurality of damping mechanisms, an axis of the screen box forms an included angle of 25-45 degrees with the horizontal plane, a feed inlet is arranged on the upper end surface of the screen box, a large material discharge port, a medium material discharge port, a small material discharge port and a base material discharge port are sequentially arranged on the lower end surface of the screen box from top to bottom in the vertical direction, a return mineral material discharge port is arranged on the bottom of the screen box, and the feed inlet, the screening device comprises at least two bearing beams, at least two reinforcing rib plates, a plurality of material selecting screen plates, a screening box, a large material discharge port, a medium material discharge port, a small material discharge port, a paving material discharge port and the corresponding material selecting screen plates, wherein the two bearing beams are embedded in the screening box, the two ends of the bearing beams are respectively connected with the side wall of the screening box, the bearing beams are uniformly distributed along the axis direction of the screening box and are mutually vertical to the axis of the screening box, the reinforcing rib plates are embedded in the screening box and are mutually connected with the bearing beams and are vertically distributed, the reinforcing rib plates are uniformly distributed along the axis direction of the bearing beams, the material selecting screen plates are embedded in the screening box and are distributed in parallel to the axis of the screening box, each material selecting screen plate is distributed from top to bottom and is mutually connected with the reinforcing rib plates, at least one material selecting screen plate is arranged in the screening box corresponding to the large material discharge port, the medium material discharge, the transition sieve sheet is arranged above each material selection sieve sheet, the distance between each transition sieve sheet and the adjacent material selection sieve sheet is not less than 10 cm, and an included angle of 0-30 degrees is formed between each transition sieve sheet and the axis of the adjacent material selection sieve sheet, the front half part of each transition sieve sheet is positioned right below a feed inlet, the rear half part of each transition sieve sheet is positioned above the material selection sieve sheet, the length of the transition sieve sheet positioned above the material selection sieve sheet is not less than 10 cm, at least two vibration excitation mechanisms are distributed along the axis direction of the sieve box, are connected with the outer surface of the bottom of the sieve box and are vertically distributed with the axis of the sieve box, and the control system is positioned on the outer surface of the bearing frame and is electrically connected with each vibration excitation mechanism respectively.

2. The multi-screen composite screening mechanism for high-efficiency and environment-friendly solid materials according to claim 1, wherein the bearing frame comprises a bearing keel, a drainage fan, a diversion air duct and a dust removing device, wherein the bearing keel is of a frame structure with a rectangular cross section, a plurality of damping mechanisms are uniformly distributed on the upper end surface of the bearing keel and are connected with the lower end surface of the screen box through the damping mechanisms, at least one dust removing device is embedded in the bearing keel and is positioned under the screen box, at least one drainage fan is connected with the outer surface of the bearing keel and is respectively communicated with the dust removing device and each diversion chute through the diversion air duct, the diversion air duct is connected with the upper end surface of the diversion chute, a return air inlet is arranged at the connecting position of the diversion chute and the diversion air duct, and the drainage fan and the dust removing device are both electrically connected with a control system.

3. The multi-screen composite screening mechanism for the high-efficiency and environment-friendly solid materials as claimed in claim 1, wherein the diversion chute is a tubular mechanism with a cross section in any one of a rectangular shape, a circular shape and a regular polygon shape, a plurality of electrostatic electrodes are uniformly distributed in the diversion chute, the electrostatic electrodes are connected with the upper end face of the diversion chute and are vertically distributed with the upper end face of the diversion chute, and the electrostatic electrodes are mutually connected in parallel and are electrically connected with a control system.

4. The multi-screen composite screening mechanism of high-efficiency environmental-friendly solid materials as claimed in claim 1, wherein the damping mechanism comprises two bearing seats, two main bearing springs, two auxiliary bearing springs, two elastic pads and two pressure sensors, the two bearing seats are all trough-shaped structures with U-shaped axial ends, the two bearing seats are connected with each other and coaxially distributed through the main bearing springs and the auxiliary bearing springs, wherein the main bearing springs and the auxiliary bearing springs are respectively embedded in the two bearing seats, the main bearing springs have the same outer diameter as the inner diameter of the bearing seats, the outer surfaces of the main bearing springs abut against and are slidably connected with the inner surfaces of the side walls of the bearing seats, the auxiliary bearing springs are embedded in the main bearing springs, and the outer diameters of the auxiliary bearing springs are 1/3-2/3 of the inner diameter of the main bearing springs, the main pressure-bearing spring and the auxiliary pressure-bearing spring are opposite in spiral direction, the two elastic cushion blocks are respectively embedded in the two bearing seats and are coaxially distributed with the bearing seats, the elastic cushion blocks are additionally embedded in the auxiliary pressure-bearing spring and are mutually connected with the inner surface of the auxiliary pressure-bearing spring in a sliding manner, the elastic cushion blocks exceed the front end surfaces of the bearing seats by at least 5 mm, the distance between the two elastic cushion blocks in the two bearing seats is 1/5-3/4 of the distance between the two bearing seats, the two pressure sensors are respectively embedded in the front end surfaces of the two elastic cushion blocks and are coaxially distributed with the elastic cushion blocks, and the pressure sensors are further electrically connected with a control system.

5. The multi-screen composite screening mechanism for high-efficiency and environment-friendly solid materials as claimed in claim 1, wherein the bottom of the screen box is provided with a grid plate, the grid plate is positioned in the screen box and distributed parallel to the bottom of the screen box, and the grid plate is distributed with the grid hole axis vertical to the screen box axis.

6. The multi-screen composite screening mechanism for efficient and environment-friendly solid materials according to claim 1, wherein the front end surface of each material selecting screen is located behind the feeding hole, and the front end surface of the material selecting screen located below the two adjacent material selecting screens exceeds the front end surface of the material selecting screen located above the material selecting screen by at least 10 cm.

7. The multi-screen composite screening mechanism for high-efficiency and environment-friendly solid materials as claimed in claim 1, wherein the length of the transition screen plate directly below the feed port is 1/3-2/3 of the total length of the transition screen plate.

8. The multi-screen composite screening mechanism for high-efficiency and environment-friendly solid materials as claimed in claim 1, wherein the vibration excitation mechanism is provided with at least two vibration sensors, the vibration sensors are uniformly distributed along the axis of the screen box, and the detection axis of each vibration sensor is perpendicular to and intersected with the axis of the vibration excitation mechanism.

9. The multi-screen composite screening mechanism for high-efficiency and environment-friendly solid materials as claimed in claim 1, wherein the control system is an industrial computer-based circuit system, and at least one serial communication circuit and at least one internet-of-things controller are further provided in the control system.