CN113333285A - A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias - Google Patents
A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias Download PDFInfo
- Publication number
- CN113333285A CN113333285A CN202110743230.7A CN202110743230A CN113333285A CN 113333285 A CN113333285 A CN 113333285A CN 202110743230 A CN202110743230 A CN 202110743230A CN 113333285 A CN113333285 A CN 113333285A
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- China
- Prior art keywords
- sieve
- coal preparation
- screen
- chute
- preparation plant
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- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 230000018044 dehydration Effects 0.000 title claims abstract description 10
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009991 scouring Methods 0.000 abstract description 2
- 238000007873 sieving Methods 0.000 abstract description 2
- 238000012216 screening Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000007306 turnover Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention provides a fixed sieve for pre-medium removal and dehydration in a coal preparation plant, and belongs to the technical field of dense medium coal preparation. 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
Technical Field
The invention relates to the technical field of dense medium coal separation, in particular to a fixed sieve for pre-medium removal and dehydration in a coal preparation plant.
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.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a fixed sieve for pre-medium removal and dehydration of a coal preparation plant, which solves the problems of unstable screening efficiency, more screen turnover times, frequent replacement, large maintenance amount, high maintenance cost, substandard environmental protection and the like of the turnover arc sieve of the conventional sieve body device.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: 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 invention provides a fixed sieve for pre-medium removal and dehydration in a coal preparation plant. 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. According to the invention, the sieve plate structure is fixed by adopting the middle sieve plate pressing device, the sieve plate is convenient to mount, replace and dismount, and has obvious advantages compared with the existing sieve plate mounting mode, and the middle part of the discharging sieve plate is of a sieve bar structure, so that the wear resistance of the sieve plate can be greatly improved, and the service life is prolonged.
3. According to the invention, the screen box structure and the screen surface support are arranged at the inclined angle theta, so that the natural flow (depending on the action of gravity) of materials is facilitated, and the problem that the materials are remained in the screen box structure and the screen surface support and are not cleaned is solved.
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 clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the fixed screen provided in the embodiment of the present invention is composed of an oversize chute 1, a screen box structure 2, a connecting seat 3, and a dust-proof device 4.
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 (10)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110743230.7A CN113333285A (en) | 2021-07-01 | 2021-07-01 | A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110743230.7A CN113333285A (en) | 2021-07-01 | 2021-07-01 | A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias |
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| Publication Number | Publication Date |
|---|---|
| CN113333285A true CN113333285A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110743230.7A Pending CN113333285A (en) | 2021-07-01 | 2021-07-01 | A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204503541U (en) * | 2014-12-31 | 2015-07-29 | 湖北碧山机械股份有限公司 | Drawer type vibrating cleaning sieve |
| WO2016141716A1 (en) * | 2015-03-12 | 2016-09-15 | 四川重盟电力设备制造有限公司 | Coal classifying screen |
| CN208643268U (en) * | 2018-08-07 | 2019-03-26 | 四川广旺能源发展(集团)有限责任公司代池坝选煤厂 | A kind of novel high-frequency vibrating screen |
| CN210207566U (en) * | 2019-04-22 | 2020-03-31 | 河南威猛振动设备股份有限公司 | Novel frequency conversion environmental protection linear sieve |
| CN210647263U (en) * | 2019-08-09 | 2020-06-02 | 北京瀚林源科技有限公司 | Plane medium draining sieve |
| CN215235869U (en) * | 2021-07-01 | 2021-12-21 | 唐山森普矿山装备有限公司 | A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias |
-
2021
- 2021-07-01 CN CN202110743230.7A patent/CN113333285A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204503541U (en) * | 2014-12-31 | 2015-07-29 | 湖北碧山机械股份有限公司 | Drawer type vibrating cleaning sieve |
| WO2016141716A1 (en) * | 2015-03-12 | 2016-09-15 | 四川重盟电力设备制造有限公司 | Coal classifying screen |
| CN208643268U (en) * | 2018-08-07 | 2019-03-26 | 四川广旺能源发展(集团)有限责任公司代池坝选煤厂 | A kind of novel high-frequency vibrating screen |
| CN210207566U (en) * | 2019-04-22 | 2020-03-31 | 河南威猛振动设备股份有限公司 | Novel frequency conversion environmental protection linear sieve |
| CN210647263U (en) * | 2019-08-09 | 2020-06-02 | 北京瀚林源科技有限公司 | Plane medium draining sieve |
| CN215235869U (en) * | 2021-07-01 | 2021-12-21 | 唐山森普矿山装备有限公司 | A fixed sieve that is used for coal preparation factory to take off dehydration in advance that medias |
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