CN112718181A

CN112718181A - Multistage powdered ore screening recovery unit

Info

Publication number: CN112718181A
Application number: CN202011472325.1A
Authority: CN
Inventors: 唐任娥
Original assignee: Shaoyang Synthetic New Environmental Protection Building Materials Co Ltd
Current assignee: Shaoyang Synthetic New Environmental Protection Building Materials Co Ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-30

Abstract

The invention discloses a multistage mineral powder screening and recycling device which comprises a support, wherein a screening box is arranged on the support, a vibrating plate used for conveying mineral powder is obliquely arranged on the screening box, one end of the vibrating plate is movably arranged on the inner side wall of the screening box, a driving mechanism used for driving the vibrating plate to rotate in a reciprocating mode is arranged at the other end of the vibrating plate, a first screening mechanism and a second screening mechanism used for screening the mineral powder are respectively arranged on two sides of the screening box, the first screening mechanism comprises an obliquely arranged first screening net, the second screening mechanism comprises an obliquely arranged second screening net, one ends of the first screening net and the second screening net are connected through a connecting assembly, and a telescopic rod is arranged below the connecting assembly. The multistage mineral powder screening and recycling device provided by the invention can respectively crush and vibrate two mineral powders which do not meet the standard particle size again, and then screen the mineral powders again, so that the unqualified mineral powders can be effectively treated, and the screening efficiency is integrally improved.

Description

Multistage powdered ore screening recovery unit

Technical Field

The invention relates to the technical field of mineral powder processing, in particular to a multistage mineral powder screening and recycling device.

Background

Mineral powder is a general term for stone powder and substitutes thereof meeting engineering requirements, is a product obtained by crushing and processing the mineral, is a first step of processing and smelting the mineral, and is one of the most important steps, the hydrophilic coefficient of the mineral powder is the ratio of the volume of expansion of the unit mineral powder in water with the same volume and kerosene with the same volume, and the particle size of the mineral powder needs to be screened when the mineral powder is processed generally, so that a screening device is used for screening the mineral powder to ensure that the screened mineral powder can reach the standard particle size.

The defects of the prior art are as follows: the screening plant of current powdered ore uses too troublesome, and sieves the effect relatively poor, can not effectually sieve the powdered ore, and can not effective processing to the great powdered ore that does not conform to the particle size standard of particle size, leads to screening efficiency low.

Disclosure of Invention

Solves the technical problem

In view of the above problems in the prior art, an aspect of the present invention is to provide a multistage mineral powder screening and recycling device, which is used to solve the problems that the existing mineral powder screening device is too troublesome to use, has a poor screening effect, cannot effectively screen mineral powder, and cannot effectively process mineral powder with a large particle size and a particle size standard, which does not meet the particle size standard, and thus has low screening efficiency.

Technical scheme

Aiming at the technical problems in the prior art, the embodiment of the invention provides a multistage mineral powder screening and recycling device.

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:

the utility model provides a multistage powdered ore screening recovery unit, includes the support, be equipped with the screening case on the support, the slope is equipped with the vibration board that is used for conveying powdered ore on the screening case, and the below of vibration board is provided with vibrating motor, under vibrating motor's vibration, can carry out crushing treatment to the powdered ore that drops on the vibration board, the one end activity of vibration board sets up on the inside wall of screening case, the other end is equipped with and is used for the drive vibration board reciprocating rotary's actuating mechanism through setting up actuating mechanism, can drive simultaneously and smash tooth and vibration board motion, and the accessible drives the camshaft and rotates, and the camshaft is at the cam groove internal rotation to drive the vibration board along with screening case articulated axle reciprocating motion, can further increase the transport and the crushing effect of vibration board.

A first screening mechanism and a second screening mechanism for screening mineral powder are respectively arranged on two sides of the screening box, the first screening mechanism comprises a first screening net which is obliquely arranged, the second screening mechanism comprises a second screening net which is obliquely arranged, one ends of the first screening net and the second screening net are connected through a connecting assembly, a telescopic rod is arranged below the connecting assembly, and the telescopic rod can drive the first screening net and the second screening net to reciprocate through the connecting assembly;

the bracket is also provided with a feeding box for feeding, mineral powder is fed into the feeding box, is crushed by the crushing teeth and then falls into the vibrating plate.

Preferably, the first screening mechanism further comprises a first feeding pipe, the second screening mechanism further comprises a second feeding pipe, the first feeding pipe is fixedly installed at a port at one end of the screening box and is communicated with the screening box, and one end of the first screening net is hinged in the first feeding pipe;

the second feeding pipe is fixedly communicated with the lower port of the first feeding pipe, and one end of the second screening net is hinged in the second feeding pipe.

Preferably, the connecting assembly comprises a lifting shaft, a first rotating plate and a second rotating plate, and the first rotating plate and the second rotating plate are movably arranged on the outer wall of the lifting shaft;

one end of the first screening net is arranged in a sliding groove formed in the first rotating plate in a sliding mode, and one end of the second screening net is arranged in a sliding groove formed in the second rotating plate in a sliding mode.

Preferably, the first screening mechanism further comprises a second conveying pipe, a third air blower and a fourth air blower, one end of the second conveying pipe is fixedly communicated with the first feeding pipe, the first screening net is located in a pipe opening of the second conveying pipe, an air outlet of the third air blower is communicated with the second conveying pipe, an air outlet of the fourth air blower is communicated with the second conveying pipe, and the air outlet of the first air blower is upward.

Preferably, the second screening mechanism further comprises a first air blower, a second air blower and a first conveying pipe, a port at one end of the first conveying pipe is communicated with the second feeding pipe, an air outlet of the first air blower is communicated with the first conveying pipe, an air outlet of the second air blower is communicated with the first conveying pipe, and the air outlet of the first air blower is upward.

Preferably, actuating mechanism includes driving motor and camshaft, the quantity of camshaft is two, and one of them camshaft is fixed to be installed on driving motor's output shaft, another camshaft activity sets up on the inner wall of screening case, all seted up the cam groove on the outer wall of the relative both sides of screening case, and two the axostylus axostyle of camshaft is located two respectively in the cam groove.

Preferably, the feeding box is provided with crushing teeth, a transmission belt is sleeved on one end of a shaft rod of each crushing tooth, which penetrates through and extends to the outer side of the feeding box, and the transmission belt is sleeved on a belt pulley arranged on an output shaft of the driving motor.

Preferably, one end of the first screening net is provided with a connecting plate, one end of the connecting plate is located in the pipe orifice of the second conveying pipe, and the connecting plate can convey all the mineral powder screened by the first screening net into the second conveying pipe.

Preferably, the nozzle of the first conveying pipe is positioned at the feeding port of the feeding box.

Preferably, the opening part of one end of the second conveying pipe is fixedly communicated with a conveying box, the conveying box is fixedly installed on the screening box, a feed opening is formed in the bottom of the conveying box, and the feed opening faces the screening box.

Compared with the prior art, the multistage mineral powder screening and recycling device provided by the embodiment of the invention has the following beneficial effects:

the first screening mechanism and the second screening mechanism are respectively arranged on the two sides of the bracket, so that the mineral powder can be screened for the second time through the first screening mechanism and the second screening mechanism, the screening efficiency can be increased, the screening effect on the mineral powder can be increased, then the unqualified grain diameters are respectively conveyed to different crushing devices through the arranged first conveying pipe and the second conveying pipe, namely the vibrating plate and the crushing teeth, so that the two kinds of mineral powder which do not meet the standard grain diameter can be respectively crushed and vibrated again, then sieving is carried out again, thereby being capable of effectively treating unqualified mineral powder, integrally improving the sieving efficiency, then through the coupling assembling that sets up, accessible coupling assembling and telescopic link drive first screening net and second screening net reciprocating motion respectively simultaneously to can be with increasing the screening efficiency of first screening net and second screening net. Then through setting up actuating mechanism, can drive simultaneously and smash tooth and vibration board motion, the accessible drives the camshaft rotation, and the camshaft is at the cam groove internal rotation to drive the vibration board along with screening case articulated axle reciprocating motion mutually, can further increase the transport and the crushing effect of vibration board.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

FIG. 1 is a schematic structural view of the present invention;

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

FIG. 3 is a schematic diagram of a third perspective of the present invention;

FIG. 4 is a schematic front view of the present invention;

FIG. 5 is a schematic view of the first screening mesh and the first feed tube of the present invention;

FIG. 6 is a schematic view of the structure of the vibrating plate according to the present invention;

FIG. 7 is a schematic view of a first delivery tube according to the present invention;

FIG. 8 is a schematic view of a coupling assembly of the present invention;

fig. 9 is a schematic structural view of the connecting assembly and the connecting plate of the present invention.

In the figure: 1. a support; 2. screening the box; 3. a supporting seat; 4. a feeding box; 5. a vibrating plate; 6. a delivery box; 7. a first screening net; 8. a first blower; 9. a material receiving box; 10. a first delivery pipe; 11. a second blower; 12. a third blower; 13. a first feed pipe; 14. a second feed tube; 15. a second delivery pipe; 16. a fourth blower; 17. a drive motor; 18. crushing teeth; 19. a drive belt; 20. a telescopic rod; 21. a camshaft; 22. a second screening mesh; 23. a first rotating plate; 24. a second rotating plate; 25. a lifting shaft; 26. a connecting plate; 27. a material receiving box; 501. a cam groove.

Detailed Description

So that the objects, technical solutions and advantages of the embodiments of the present disclosure will be more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Referring to fig. 1-9, a multistage mineral powder screening and recycling device, a screening box 2 is arranged on a support 1, a vibrating plate 5 for conveying mineral powder is obliquely arranged on the screening box 2, a vibrating motor is arranged below the vibrating plate 5, mineral powder falling on the vibrating plate 5 can be crushed under the vibration of the vibrating motor, one end of the vibrating plate 5 is movably arranged on the inner side wall of the screening box 2, and a driving mechanism for driving the vibrating plate 5 to rotate in a reciprocating manner is arranged at the other end of the vibrating plate 5; by arranging the driving mechanism, the crushing teeth 18 and the vibrating plate 5 can be driven to move simultaneously, the cam shaft 21 can be driven to rotate, the cam shaft 21 rotates in the cam groove 501, the vibrating plate 5 is driven to reciprocate along a shaft hinged with the screening box 2, the conveying and crushing effects of the vibrating plate 5 can be further increased, a first screening mechanism and a second screening mechanism for screening mineral powder are respectively arranged on two sides of the screening box 2, the first screening mechanism comprises a first screening net 7 which is obliquely arranged, the second screening mechanism comprises a second screening net 22 which is obliquely arranged, one ends of the first screening net 7 and the second screening net 22 are connected through a connecting component, a telescopic rod 20 is arranged below the connecting component, the telescopic rod can drive the first screening net 7 and the second screening net 22 to reciprocate through the connecting component, a feeding box 4 for feeding is further arranged on the support 1, the mineral powder is sent into the feeding box 4, the mineral powder is crushed through the crushing teeth 18, then the mineral powder is dropped to the vibrating plate 5, the first screening mechanism and the second screening mechanism are respectively arranged on the two sides of the bracket 1, so that the mineral powder can be secondarily screened through the first screening mechanism and the second screening mechanism, the screening efficiency can be increased, the screening effect on the mineral powder can be increased, the unqualified particle diameters are respectively conveyed to different crushing devices through the arranged first conveying pipe 10 and the arranged second conveying pipe 15, namely the vibrating plate 5 and the crushing teeth 18, so that the mineral powder which does not accord with the standard particle diameters can be respectively crushed and vibrated again and then screened again, the unqualified mineral powder can be effectively processed, the screening efficiency is integrally improved, then through the arranged connecting assembly, the connecting assembly and the telescopic rod 20 can respectively and simultaneously drive the first screening net 7 and the second screening net 22 to reciprocate, thereby can will increase the screening efficiency of first screening net 7 and second screening net 22, then through setting up actuating mechanism, can drive simultaneously and smash tooth 18 and vibration board 5 motion, the accessible drives camshaft 21 and rotates, camshaft 21 is at the internal rotation of cam groove 501 to drive vibration board 5 along with screening case 2 looks articulated axle reciprocating motion, can further increase vibration board 5's transport and crushing effect.

In the embodiment provided by the invention, the first screening mechanism further comprises a first feeding pipe 13, the second screening mechanism further comprises a second feeding pipe 14, the first feeding pipe 13 is fixedly arranged at the port of one end of the screening box 2 and is communicated with the screening box 2, and one end of the first screening net 7 is hinged in the first feeding pipe 13.

The second feeding pipe 14 is fixedly communicated with the lower port of the first feeding pipe 13, and one end of the second screening net 22 is hinged in the second feeding pipe 14.

In the further proposed technical scheme of the present invention, the connecting assembly includes a lifting shaft 25, a first rotating plate 23 and a second rotating plate 24, the first rotating plate 23 and the second rotating plate 24 are both movably disposed on the outer wall of the lifting shaft 25, one end of the first sieving net 7 is slidably disposed in a sliding slot formed on the first rotating plate 23, and one end of the second sieving net 22 is slidably disposed in a sliding slot formed on the second rotating plate 24.

Further, first screening mechanism still includes second conveyer pipe 15, third air-blower 12 and fourth air-blower 16, and the one end and the fixed intercommunication of first conveying pipe 13 of second conveyer pipe 15, and first screening net 7 is located the mouth of pipe of second conveyer pipe 15, and the air outlet of third air-blower 12 is linked together with second conveyer pipe 15, and the air outlet of fourth air-blower 16 is linked together with second conveyer pipe 15, and the air outlet direction of first air-blower 8 is upwards.

Furthermore, the second screening mechanism further comprises a first air blower 8, a second air blower 11 and a first conveying pipe 10, a port at one end of the first conveying pipe 10 is communicated with the second feeding pipe 14, an air outlet of the first air blower 8 is communicated with the first conveying pipe 10, an air outlet of the second air blower 11 is communicated with the first conveying pipe 10, and the air outlet of the first air blower 8 is upward.

Furthermore, in the present invention, the driving mechanism includes a driving motor 17 and two camshafts 21, the number of the camshafts 21 is two, one of the camshafts 21 is fixedly installed on the output shaft of the driving motor 17, the other camshaft 21 is movably disposed on the inner wall of the screening box 2, cam grooves 501 are disposed on the outer walls of two opposite sides of the screening box 2, and the shaft levers of the two camshafts 21 are respectively located in the two cam grooves 501.

In the further proposed technical scheme of the invention, the feeding box 4 is provided with the crushing teeth 18, one end of a shaft rod of the crushing teeth 18, which penetrates through and extends to the outer side of the feeding box 4, is sleeved with the transmission belt 19, the transmission belt 19 is sleeved on a belt pulley arranged on an output shaft of the driving motor 17, one end of the first screening net 7 is provided with a connecting plate 26, one end of the connecting plate 26 is positioned in a pipe orifice of the second conveying pipe 15, and the connecting plate 26 is arranged to be capable of conveying all mineral powder screened by the first screening net 7 into the second conveying pipe 15.

In some embodiments, the pipe orifice of the first conveying pipe 10 is located at the feeding port of the feeding box 4, the conveying box 6 is fixedly communicated with the opening at one end of the second conveying pipe 15, the conveying box 6 is fixedly installed on the screening box 2, the bottom of the conveying box 6 is provided with a feed opening, and the feed opening faces the screening box 2.

When the device is used, the device is started, mineral powder to be screened is placed through a feeding hole of a feeding box 4, then a driving motor 17 rotates to drive a crushing tooth 18 and a vibrating plate 5 to move simultaneously, a cam shaft 21 can be driven to rotate, the cam shaft 21 rotates in a cam groove 501, so that the vibrating plate 5 is driven to reciprocate along an axis hinged with a screening box 2, the mineral powder falls onto the vibrating plate 5 after being crushed by the crushing tooth 18, then the mineral powder can vibrate while reciprocating under the driving of the vibrating plate 5 and the driving motor 17, the mineral powder is crushed again, the vibrating plate 5 is obliquely arranged, an inclined plane faces towards a first screening net 7, the mineral powder slides onto the first screening net 7 through the vibrating plate 5, then an expansion rod 20 continuously vertically reciprocates to drive a lifting shaft 25 connected with the vibrating plate to move, thereby the lifting shaft 25 drives the first rotating plate 23 and the second rotating plate 24 which are movably arranged to move, so that the first sieving net 7 and the second sieving net 22 which are respectively arranged on the first rotating plate 23 and the second rotating plate 24 in a sliding way reciprocate, thereby the sieving efficiency of the two sieving nets can be increased, then the particle diameter sieved by the first sieving net 7 falls onto the second sieving net 22, the particle diameter larger than the aperture of the first sieving net 7 slides into the second conveying pipe 15 through the inclined first sieving net 7, then the mineral powder dropped into the second conveying pipe 15 is conveyed into the conveying direction box through the third air blower 12 and the fourth air blower 16 respectively, then the mineral powder drops onto the vibrating plate 5 through the conveying box 6 again for circulating sieving, the aperture of the mesh of the second sieving net 22 is smaller than the aperture of the first sieving net 7 for sieving, and the mineral powder dropped onto the second sieving net 22, screening through second screening net 22, the particle diameter is greater than the slope and sets up the powdered ore landing in gauze second screening net 22 aperture to first conveyer pipe 10, then respectively through first air-blower 8 and second air-blower 11, the powdered ore that drops to in the first conveyer pipe 10 blows to in feeding box 4, thereby can not accord with the powdered ore of standard particle diameter and carry out the repulverize screening, the powdered ore that accords with the particle diameter standard falls to in material receiving box 27, then fall to in material receiving box 9 through material receiving box 27, thereby can carry out multistage screening with the powdered ore.

According to the invention, the first screening mechanism and the second screening mechanism are respectively arranged on two sides of the bracket 1, so that mineral powder can be screened for the second time through the first screening mechanism and the second screening mechanism, thereby not only increasing screening efficiency, but also increasing screening effect on the mineral powder, then unqualified mineral powder can be respectively conveyed to different crushing devices, namely the vibrating plate 5 and the crushing teeth 18, through the arranged first conveying pipe 10 and the arranged second conveying pipe 15, so that two mineral powders which do not accord with standard particle size can be respectively crushed and vibrated again, then screening is carried out again, thereby unqualified mineral powder can be effectively treated, the screening efficiency is integrally improved, then through the arranged connecting assembly, the first screening net 7 and the second screening net 22 can be respectively driven to reciprocate through the connecting assembly and the telescopic rod 20, thereby can will increase the screening efficiency of first screening net 7 and second screening net 22, then through setting up actuating mechanism, can drive simultaneously and smash tooth 18 and vibration board 5 motion, the accessible drives camshaft 21 and rotates, camshaft 21 is at the internal rotation of cam groove 501 to drive vibration board 5 along with screening case 2 looks articulated axle reciprocating motion, can further increase vibration board 5's transport and crushing effect.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. The utility model provides a multistage powdered ore screening recovery unit, includes support (1), its characterized in that: the ore powder screening device is characterized in that a screening box (2) is arranged on the support (1), a vibrating plate (5) used for conveying ore powder is obliquely arranged on the screening box (2), one end of the vibrating plate (5) is movably arranged on the inner side wall of the screening box (2), and a driving mechanism used for driving the vibrating plate (5) to rotate in a reciprocating mode is arranged at the other end of the vibrating plate (5);

a first screening mechanism and a second screening mechanism for screening mineral powder are respectively arranged on two sides of the screening box (2), the first screening mechanism comprises a first screening net (7) which is obliquely arranged, the second screening mechanism comprises a second screening net (22) which is obliquely arranged, one ends of the first screening net (7) and the second screening net (22) are connected through a connecting component, a telescopic rod (20) is arranged below the connecting component, and the telescopic rod can drive the first screening net (7) and the second screening net (22) to reciprocate through the connecting component;

the support (1) is also provided with a feeding box (4) for feeding.

2. The multi-stage mineral powder screening and recycling device according to claim 1, characterized in that: the first screening mechanism further comprises a first feeding pipe (13), the second screening mechanism further comprises a second feeding pipe (14), the first feeding pipe (13) is fixedly installed at a port at one end of the screening box (2) and communicated with the screening box (2), and one end of the first screening net (7) is hinged in the first feeding pipe (13);

the second feeding pipe (14) is fixedly communicated with the lower port of the first feeding pipe (13), and one end of the second screening net (22) is hinged in the second feeding pipe (14).

3. The multi-stage mineral powder screening and recycling device according to claim 1, characterized in that: the connecting assembly comprises a lifting shaft (25), a first rotating plate (23) and a second rotating plate (24), and the first rotating plate (23) and the second rotating plate (24) are movably arranged on the outer wall of the lifting shaft (25);

one end of the first screening net (7) is arranged in a sliding groove formed in the first rotating plate (23) in a sliding mode, and one end of the second screening net (22) is arranged in a sliding groove formed in the second rotating plate (24) in a sliding mode.

4. The multi-stage mineral powder screening and recycling device according to claim 2, characterized in that: the first screening mechanism further comprises a second conveying pipe (15), a third air blower (12) and a fourth air blower (16), one end of the second conveying pipe (15) is fixedly communicated with the first feeding pipe (13), the first screening net (7) is located in a pipe orifice of the second conveying pipe (15), an air outlet of the third air blower (12) is communicated with the second conveying pipe (15), an air outlet of the fourth air blower (16) is communicated with the second conveying pipe (15), and the air outlet of the first air blower (8) is upward in direction.

5. The multi-stage mineral powder screening and recycling device according to claim 1, characterized in that: the second screening mechanism further comprises a first air blower (8), a second air blower (11) and a first conveying pipe (10), a port at one end of the first conveying pipe (10) is communicated with the second conveying pipe (14), an air outlet of the first air blower (8) is communicated with the first conveying pipe (10), an air outlet of the second air blower (11) is communicated with the first conveying pipe (10), and the air outlet of the first air blower (8) is upward.

6. The multi-stage mineral powder screening and recycling device according to claim 1, characterized in that: actuating mechanism includes driving motor (17) and camshaft (21), the quantity of camshaft (21) is two, and one of them camshaft (21) fixed mounting is in on the output shaft of driving motor (17), another camshaft (21) activity sets up on the inner wall of screening case (2), cam groove (501) have all been seted up on the outer wall of the relative both sides of screening case (2), and two the axostylus axostyle of camshaft (21) is located two respectively in cam groove (501).

7. The multi-stage mineral powder screening and recycling device according to claim 1, characterized in that: feeding case (4) are equipped with crushing tooth (18), just the axostylus axostyle of crushing tooth (18) runs through to be equipped with driving belt (19) to one of the end that extends to feeding case (4) outside, just driving belt (19) cover is established on the belt pulley that sets up on driving motor (17) output shaft.

8. The multi-stage mineral powder screening and recycling device according to claim 4, wherein: one end of the first screening net (7) is provided with a connecting plate (26), and one end of the connecting plate (26) is positioned in the pipe orifice of the second conveying pipe (15).

9. The multi-stage mineral powder screening and recycling device according to claim 5, wherein: the orifice of the first conveying pipe (10) is positioned at the feed inlet of the feed box (4).

10. The multi-stage mineral powder screening and recycling device according to claim 4, wherein: the opening part of second conveyer pipe (15) one end is fixed the intercommunication has transport case (6), just transport case (6) fixed mounting is on screening case (2), and the feed opening has been seted up to the bottom of transport case (6), and the feed opening is towards screening case (2).