CN215235869U

CN215235869U - A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias

Info

Publication number: CN215235869U
Application number: CN202121483803.9U
Authority: CN
Inventors: 马俊敏; 张永才; 郑中; 梁福兴
Original assignee: Tangshan Senpu Mining Equipment Co ltd
Current assignee: Tangshan Senpu Mining Equipment Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-12-21
Anticipated expiration: 2031-07-01

Abstract

The utility model provides a fixed sieve that is used for coal preparation plant to take off medium dehydration in advance, dense medium coal dressing technical field. The utility model provides a fixed sieve for coal preparation plant takes off dehydration in advance, includes chute on the sieve, sieve case structure, connecting seat, undersize chute, dust keeper, sieve case structure sets up with the horizontal plane slope, the top of sieve case structure is provided with the feed inlet, the bottom fixed connection of chute on the sieve and sieve case structure, the bottom fixedly connected with sifter support of sieve case structure, the top of sifter support and the cavity intercommunication of sieve case structure, the bottom of sifter support is provided with the discharge gate, sifter support is parallel with sieve case structure, sifter support and discharge gate form the undersize chute. Through reasonable structural design, the material flow has small scouring force on the sieve plate, the sieve plate is slowly worn, the service life is long, and the sieving efficiency is stable; the sieve plate has simple structure, convenient assembly and maintenance and low maintenance cost; the dustproof device is convenient to assemble and disassemble, the dustproof effect of the equipment is good, and the environment-friendly requirement is met.

Description

A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias

Technical Field

The utility model relates to a dense medium coal dressing technical field specifically is a fixed sieve that is used for coal preparation plant to take off medium dehydration in advance.

Background

At present, the pre-medium removal and dehydration equipment of the traditional dense medium coal separation process basically adopts a sieve bend, and the working mechanism of the sieve bend is as follows: the ground paste passes through the feeder box with certain speed and gives into the sifter from the top along tangential direction, and under the effect of centrifugal force, the sifter is hugged closely to the thick liquid layer and flows, and the in-process that flows, the thick liquid layer is cut by transverse arrangement's screen bar arris, and the ground paste that is less than the screen cut sees through the sifter and becomes undersize product, and large granule material and few part water cross the screen bar and become the product on the sieve.

In the using process, the cutting mechanism of the arc-shaped screen causes the edges of the screen bars to be quickly worn, the cutting action on a slurry layer is weakened, and the screening efficiency is reduced; the sieve surface of the arc-shaped sieve is of a whole plate structure, so that the sieve surface is inconvenient to replace and the whole sieve surface is replaced with small-area abrasion; the sieve box is designed in an open mode, and material flow splashes.

Based on the above, the turnover arc-shaped sieve has the defects of unstable screening efficiency, multiple turnover times of the sieve mesh, frequent replacement, large maintenance amount, high maintenance cost, substandard environmental protection and the like.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a be not enough to prior art, the utility model provides a fixed sieve for coal preparation plant takes off medium dehydration in advance has solved current screen frame device upset sieve bend and has had that screening efficiency is unstable, the screen cloth upset number of times is many, change frequently, the maintenance volume is big, cost of maintenance is high and the environmental protection not up to standard scheduling not enough problem.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a fixed sieve for pre-medium removal and dehydration of a coal preparation plant comprises an upper sieve chute, a sieve box structure, a connecting seat, a lower sieve chute and a dustproof device, wherein the sieve box structure is obliquely arranged with a horizontal plane, the top of the sieve box structure is provided with a feeding hole, the upper sieve chute is fixedly connected with the bottom end of the sieve box structure, the bottom of the sieve box structure is fixedly connected with a sieve surface support, the top of the sieve surface support is communicated with a cavity of the sieve box structure, the bottom of the sieve surface support is provided with a discharging hole, the sieve surface support is parallel to the sieve box structure, and the sieve surface support and the discharging hole form the lower sieve chute;

the screen box structure is fixed with an external steel structure through a connecting seat;

the sieve box structure comprises a tank body, a middle sieve plate pressing device, a sieve plate structure and a side sieve plate pressing device, wherein the sieve plate structure is arranged at the top opening of the sieve surface support and is pressed and fixed through the middle sieve plate pressing device.

Preferably, the bottom of the chute on the sieve is provided with a discharge port, the top of the chute on the sieve is provided with a first connecting flange, the bottom of the sieve box structure is provided with a second connecting flange, and the first connecting flange is fixedly connected with the second connecting flange through screws.

Preferably, a rubber plate is arranged between the first connecting flange and the second connecting flange.

Preferably, the screen deck structure comprises: the feeding blind plate, the discharging sieve plate and the discharging blind plate are sequentially arranged along the material flow direction from a feeding port.

Preferably, ejection of compact sieve includes outer frame body, a plurality of grate bars of inboard equidistance fixedly connected with of outer frame body form the sieve mesh between a plurality of grate bars.

Preferably, the number of the discharging sieve plates is set to be a plurality, and the discharging sieve plates are arranged side by side.

Preferably, the intermediate pressure screen plate device comprises: the device comprises a cross beam fixedly connected with the side face of a tank body, wherein a hoop is arranged on the outer side of the cross beam, a support frame is fixedly connected with the bottom of the hoop, a pressure head is fixedly connected with the bottom end of the support frame, a pressure screen bar is arranged at the bottom of the pressure head, and the bottom of the pressure screen bar is pressed at the top of a discharge screen plate.

Preferably, the bottom of the pressure head is provided with a pressure head cavity, and a wedge block is arranged inside the pressure head cavity.

Preferably, the connecting seat adopts the staple bolt form, can the bottom sprag or suspend in midair and external steel construction is fixed.

Preferably, the dust-proof means includes: dustproof rubber cloth, the both sides limit of dustproof rubber cloth mutual symmetry all is provided with C type rubber strip, C type rubber strip can block with the side of tank body top opening.

(III) advantageous effects

The utility model provides a fixed sieve that is used for coal preparation plant to take off medium dehydration in advance. The method has the following beneficial effects:

1. compared with the prior art, its obvious effect lies in: the material flow has small scouring force on the sieve plate, the sieve plate is slowly worn, the service life is long, and the sieving efficiency is stable; the sieve plate has simple structure, convenient assembly and maintenance and low maintenance cost; the dustproof device is convenient to assemble and disassemble, the dustproof effect of the equipment is good, and the environment-friendly requirement is met.

2. The utility model discloses, through adopting middle pressure sieve device to fix the sieve structure, the sieve installation, change and dismantle all more convenient, have obvious advantage for current sieve mounting means, ejection of compact sieve middle part is the grating structure moreover, and the wear resistance that can greatly increased sieve increases life.

3. The utility model discloses, set up sieve case structure and sifter support through the theta angle with the slope, be favorable to the natural flow (relying on the action of gravity) of material, avoid the material to remain inside sieve case structure and sifter support, the problem that does not utilize to clear away.

Drawings

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

figure 2 is a schematic view of an intermediate pressure screen deck arrangement;

figure 3 is a schematic view of a screen deck;

FIG. 4 is a schematic view of a dust-proofing apparatus;

wherein, the arrow direction in the attached figure 1 is the feeding direction of the feeding port, theta is the inclination angle of the sieve plate and the horizontal plane, and the arrow direction in the attached figure 3 is the material flow direction.

Reference numerals: 1. a chute on the screen; 2. a sieve box structure; 3. a connecting seat; 4. a dust-proof device; 5. a tank body; 6. a middle pressure sieve plate device; 7. the side surface presses the sieve plate device; 8. feeding a blind plate; 9. a discharging sieve plate; 901. screen bars; 10. a discharging blind plate; 11. a screen surface support; 12. a cross beam; 13. hooping; 14. a pressure head; 15. a wedge block; 16. pressing the screen bars; 17. Dustproof rubber cloth; 18. c-shaped rubber strips.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the embodiment of the present invention provides a fixed sieve, which is composed of an oversize chute 1, a sieve box structure 2, a connecting seat 3 and a dust-proof device 4.

Chute 1 is welded structure spare on the sieve, and its flange passes through the bolt fastening with 2 flanges of sieve case structure, and the middle rubber slab that adds can prevent that the material from leaking.

The sieve box structure 2 is composed of a groove box body 5, a middle sieve plate pressing device 6, a side sieve plate pressing device 7, a feeding blind plate 8, a discharging sieve plate 9, a discharging blind plate 10, a sieve surface support 11, a cross beam 12 and the like, wherein the feeding blind plate 8, the discharging sieve plate 9 and the discharging blind plate 10 form the whole sieve surface.

The groove box body 5 is a cavity formed by welding wear-resisting plates.

The feeding blind plate 8, the discharging sieve plate 9 and the discharging blind plate 10 are sequentially arranged from the feeding port along the material flow direction.

The screen surface support is formed by welding profile steels and is fixed at the lower part of the tank body.

The space formed by the lower part of the screen surface bracket and the tank body naturally forms a screen-down chute which is used as a screen-down product channel.

The middle screen pressing plate device 6 shown in fig. 2 is composed of an anchor ear 13, a pressing head 14, a wedge block 15 and screen pressing strips 16, the anchor ear and the pressing head are fixed on a cross beam 12 through bolts, the wedge block 15 is inserted into a cavity of the pressing head along an inclined plane to press the screen pressing strips 16, and the screen pressing strips 16 press edges of screen plates on two sides in a downstream seamless mode, so that a screen surface is fixed in the middle position. The bottom of the screen pressing bar (16) is pressed on the top of the discharging screen plate (9).

Fig. 3 is a schematic view of a discharging sieve plate 9, and a frame formed by welding steel plates is fixed with sieve bars 901 with sieve seams along the material flow direction, so that the discharging of materials is facilitated, and the abrasion of the sieve plate is reduced.

The screen bars 901 are fixed on the screen surface bracket 11 through the middle screen plate pressing device 6 and the side screen plate pressing device 7, and the screen plates are fixed reliably and are convenient to replace.

The dust keeper that fig. 4 shows, 2mm dustproof rubber cloth 17 pass through 18 joints of C type rubber strip at sieve case top, and the installation is dismantled conveniently, prevents that the material stream from splashing.

The working principle is as follows: the screening surface is installed with theta angle slope, and the pan feeding blind plate that the ground paste got into the screening surface from the pan feeding mouth with certain velocity of flow, under the bearing separation of pan feeding blind plate, the energy reduces, and the material stream leans on dead weight and the promotion of follow-up material stream to slide down along the screen cut along the screening surface, and the ground paste that is less than the screen cut sees through the screening surface and becomes undersize result, and the material on the screen gets into next process through the chute on the screen.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fixed sieve that is used for coal preparation plant to take off dehydration in advance, includes chute (1) on the sieve, sieve case structure (2), connecting seat (3), chute under the sieve, dust keeper (4), its characterized in that: the sieve box structure (2) is obliquely arranged with a horizontal plane, a feed inlet is formed in the top of the sieve box structure (2), the sieve chute (1) is fixedly connected with the bottom end of the sieve box structure (2), the bottom of the sieve box structure (2) is fixedly connected with a sieve surface support (11), the top of the sieve surface support (11) is communicated with a cavity of the sieve box structure (2), a discharge outlet is formed in the bottom of the sieve surface support (11), the sieve surface support (11) is parallel to the sieve box structure (2), and the sieve surface support (11) and the discharge outlet form a sieve chute;

the screen box structure (2) is fixed with an external steel structure through a connecting seat (3);

sieve case structure (2) press sieve device (7) including groove box (5), centre pressure sieve device (6), sieve structure, side, sieve structure sets up the top opening part at sifter support (11) to press sieve device (6) to compress tightly fixedly through the centre.

2. The fixed screen for pre-de-media dewatering of a coal preparation plant as recited in claim 1, further comprising: the bottom of the chute (1) on the sieve is provided with a discharge port, the top of the chute is provided with a first connecting flange, the bottom of the sieve box structure (2) is provided with a second connecting flange, and the first connecting flange is fixedly connected with the second connecting flange through screws.

3. The fixed screen for pre-de-media dewatering of a coal preparation plant of claim 2, wherein: and a rubber plate is arranged between the first connecting flange and the second connecting flange.

4. The fixed screen for pre-de-media dewatering of a coal preparation plant as recited in claim 1, further comprising: the screen deck structure includes: pan feeding blind plate (8), ejection of compact sieve (9), ejection of compact blind plate (10), pan feeding blind plate (8), ejection of compact sieve (9), ejection of compact blind plate (10) are arranged in proper order along the material flow direction by the pan feeding mouth.

5. The fixed screen for pre-de-media dewatering of a coal preparation plant of claim 4, wherein: the discharging sieve plate (9) comprises an outer frame body, a plurality of sieve bars (901) are fixedly connected to the inner side of the outer frame body at equal intervals, and sieve holes are formed among the sieve bars (901).

6. A fixed screen for pre-de-media dewatering of a coal preparation plant according to claim 4 or 5, characterized in that: the number of the discharging sieve plates (9) is set to be a plurality, and the discharging sieve plates (9) are arranged side by side.

7. The fixed screen for pre-de-media dewatering of a coal preparation plant as recited in claim 1, further comprising: the intermediate pressure screen plate device (6) comprises: crossbeam (12) of groove box (5) side fixed connection, the outside of crossbeam (12) is provided with staple bolt (13), the bottom fixedly connected with support frame of staple bolt (13), the bottom fixedly connected with pressure head (14) of support frame, the bottom of pressure head (14) is provided with presses grating (16), the bottom of pressing grating (16) is pressed at the top of ejection of compact sieve (9).

8. The fixed screen for pre-de-media dewatering of a coal preparation plant of claim 7, wherein: the bottom of pressure head (14) is provided with the pressure head cavity, the inside of pressure head cavity is provided with voussoir (15).

9. The fixed screen for pre-de-media dewatering of a coal preparation plant as recited in claim 1, further comprising: the connecting seat (3) adopts a hoop form and can be supported at the bottom or suspended to be fixed with an external steel structure.

10. A fixed screen for pre-de-media dewatering of a coal preparation plant according to claim 1, characterized in that the dust protection means (4) comprises: dustproof rubber cloth (17), the both sides limit of dustproof rubber cloth (17) mutual symmetry all is provided with C type rubber strip (18), C type rubber strip (18) can block with groove box (5) top open-ended side.