CN114798408A - Roller screen system with automatic cleaning function and using method thereof - Google Patents
Roller screen system with automatic cleaning function and using method thereof Download PDFInfo
- Publication number
- CN114798408A CN114798408A CN202210435838.8A CN202210435838A CN114798408A CN 114798408 A CN114798408 A CN 114798408A CN 202210435838 A CN202210435838 A CN 202210435838A CN 114798408 A CN114798408 A CN 114798408A
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- Prior art keywords
- roller screen
- screen
- compressed air
- automatic cleaning
- roller
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- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007921 spray Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000003245 coal Substances 0.000 claims description 24
- 238000010926 purge Methods 0.000 claims description 17
- 238000007689 inspection Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000009466 transformation Effects 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
- B07B1/12—Apparatus having only parallel elements
- B07B1/14—Roller screens
-
- 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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- 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
-
- 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
- B07B1/50—Cleaning
- B07B1/55—Cleaning with fluid jets
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a roller screen system with an automatic cleaning function and a using method thereof, wherein the roller screen system comprises a roller screen body, a self-cleaning system, a sealing cover plate, a compressed air source and a DCS control unit; the roller screen body comprises a screen shaft and a screen disc sleeved on the screen shaft; the self-cleaning system comprises a main pipeline, wherein a plurality of branch pipelines are communicated with the main pipeline, a plurality of spray heads are communicated with the branch pipelines, and the plurality of spray heads are arranged on one side close to the sieve tray; the free end of the main pipeline and a compressed air source can be connected and disconnected; the sealing cover plate is connected with the shell of the roller screen body; the self-cleaning system and the compressed air source are electrically connected with the DCS control unit. The system utilizes the compressed air and the self-cleaning system to sweep and clean the roller screen body, and meanwhile, the DCS control unit effectively realizes the automatic control of the system, so that the efficiency and the safety of the cleaning process are improved.
Description
Technical Field
The invention belongs to the technical field of electric power production coal conveying equipment, and relates to a roller screen system with an automatic cleaning function and a using method thereof.
Background
The existing roller screen is composed of a driving motor, a speed reducer, a screen shaft, screen pieces, a coupler, a bearing seat accessory and the like. Each sieve axle sieve piece rotates according to same direction in the course of the work, makes the material move along the sifter forward, stirs the material simultaneously, and the granule material that accords with the granularity requirement receives the effect of dead weight and sieve piece rotation power, falls to subordinate band conveyer in the sieve mesh, and the large granule material that does not accord with the granularity requirement moves forward and is sent into crushing equipment and carries out the breakage. Existing equipment on the market is ordinary inclination roller screen that becomes, and is less to the water content, and the great material of granularity can effectively be sieved, but is sieving the condition that the water content is higher, and viscosity is great, very easily takes place the material jam during the less material of granularity, and the majority leads to the material to block up because the material bonds the sieve axle and causes the material whereabouts not smooth. Meanwhile, screening systems such as roller screens and the like which are applied at present do not have automatic cleaning devices for screen shafts, the workload of manual cleaning is large, time and labor are wasted, the operation efficiency of the whole conveying system is influenced, and certain dangers are realized.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the roller screen system with the automatic cleaning function and the using method thereof, so that the automatic cleaning of the roller screen system is realized, the working efficiency is effectively improved, and the maintenance cost is reduced.
The invention is realized by the following technical scheme:
a roller screen system with an automatic cleaning function is characterized by comprising a roller screen body, a self-cleaning system, a sealing cover plate, a compressed air source and a DCS control unit;
the roller screen body comprises a screen shaft and a screen disc sleeved on the screen shaft;
the self-cleaning system comprises a main pipeline, a plurality of branch pipelines are communicated with the main pipeline, a plurality of spray heads are communicated with the branch pipelines, and the plurality of spray heads are arranged on one side close to the sieve tray;
the free end of the main pipeline and a compressed air source can be connected and disconnected;
the sealing cover plate is connected with the shell of the roller screen body;
and the self-cleaning system and the compressed air source are electrically connected with the DCS control unit.
Preferably, a plurality of inspection hole doors are arranged on the sealing cover plate.
Preferably, the plurality of branch pipelines are sequentially arranged at intervals along the axial direction of the main pipeline.
Preferably, the plurality of nozzles are sequentially arranged at intervals along the axial direction of the branch pipeline.
Preferably, the branch ducts are arranged between adjacent screen shafts.
Preferably, the spray head is arranged between adjacent sieve trays.
Preferably, the vertical distance between the spray head and the sieve tray is 20-30 cm.
Preferably, the pressure of the compressed air sprayed out of the spray head is greater than 0.5 MPa.
According to the using method of the roller screen system with the automatic cleaning function, when the running current of the lower-level equipment of the roller screen is in an alarm state, the DCS control unit controls the coal feeding equipment of the roller screen to stop working, controls the self-cleaning system and the compressed air source to be started, and purges the roller screen.
Preferably, after the DCS control unit controls the coal feeding equipment of the roller screen to stop working, and after the coal flow on the roller screen completely flows through, the self-cleaning system and the compressed air source are started to purge the roller screen.
Compared with the prior art, the invention has the following beneficial technical effects:
the utility model provides a roller screen system with self-cleaning function, utilize compressed air and automatically cleaning system to sweep the washing to the roller screen body, be equipped with DCS the control unit simultaneously and effectively realized the automatic control of this system, improve the work efficiency and the work security of cleaning the process, the leakproofness of roller screen system has effectively been ensured to sealed apron, adopt compressed air to sweep the washing and guaranteed the cleanness of roller screen system on the one hand, also can effectively control system's transformation cost simultaneously.
Furthermore, a plurality of inspection hole doors are arranged on the sealing cover plate, so that the sieve shaft can be conveniently overhauled.
Furthermore, the branch pipeline is arranged between the adjacent sieve shafts, so that the purging and cleaning of the roller sieve are more sufficient, and the purging efficiency is improved.
Furthermore, the spray heads are arranged between the adjacent sieve trays, so that purging and cleaning of the roller sieve are more sufficient, and purging efficiency is improved.
Furthermore, the vertical distance between the spray head and the sieve tray is 20-30 cm, accumulated coal on the sieve shaft of the roller sieve can be effectively removed, and the spray head is guaranteed not to be washed by coal flow.
Furthermore, the pressure of the compressed air sprayed out of the spray head is greater than 0.5MPa, so that the purging effect can be effectively ensured, and the blockage can be fully purged.
The use method of the roller screen system with the automatic cleaning function adopts the DCS control unit to control the process, so that the operation is more convenient and safer.
Furthermore, after the DCS control unit controls the coal feeding equipment of the roller screen to stop working, and after the coal flow on the roller screen completely flows through, the self-cleaning system and the compressed air source are started to purge the roller screen. Namely, after the DCS control unit controls the coal feeding equipment of the roller screen to stop working, delay time is set according to the speed of coal flow, the delay time ensures that the coal flow on the roller screen completely flows, and then the self-cleaning system and the compressed air source are started to purge the roller screen. The secondary blockage of the roller screen by the material which does not flow through the roller screen in the purging process is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 shows the operation of the roller screen system with automatic cleaning function according to the present invention.
Wherein: 1. the automatic cleaning device comprises a push rod motor, 2, a roller screen body, 21, a screen shaft, 22, a screen disc, 3, a self-cleaning system, 31, a main pipeline, 32, branch pipelines, 4, a sealing cover plate, 41, an inspection hole door, 5 and a compressed air source.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the product of the present invention is used, the description is merely for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, a roller screen system with an automatic cleaning function comprises a push rod motor 1, a roller screen body 2, a self-cleaning system 3, a sealing cover plate 4, a compressed air source 5 and a DCS control unit; the push rod motor 1 is connected with the roller screen body 2; the roller screen body 2 comprises a screen shaft 21 and a screen disc 22 sleeved on the screen shaft 21; self-cleaning system 3 includes trunk 31, and the intercommunication is provided with a plurality of bracings 32 on trunk 31, and a plurality of bracings 32 set up along trunk 31's axial direction interval in proper order. Preferably, the branch ducts 32 are disposed between adjacent screen shafts 21, and the extension direction of the branch ducts 32 is disposed parallel to the screen shafts 21. A plurality of nozzles are communicated with the branch pipeline 32 and are arranged at one side close to the screen disc 22; the plurality of nozzles are sequentially arranged at intervals along the axial direction of the branch pipe 32. Preferably, the spray heads are disposed between adjacent screening disks 22. Further preferably, the vertical distance between the spray head and the sieve tray 22 is 20-30 cm. The pressure of the compressed air sprayed out of the spray head is greater than 0.5MPa, so that the purging effect can be effectively ensured, and the blockage can be fully purged. The free end of the main pipeline 31 and the compressed air source 5 can be connected and disconnected; the sealing cover plate 4 is connected with the shell of the roller screen body 2; the self-cleaning system 3 and the compressed air source 5 are electrically connected with the DCS control unit. Still be equipped with a plurality of inspection hole doors 41 on the sealed apron 4, be convenient for overhaul the operation to the sieve axle, this sealed apron 4 is corrosion-resistant steel sheet.
The cleaning device is arranged at the position of the upper cover of the roller screen. The cleaning device is composed of a plurality of rows of high-pressure spray heads, and the number of the rows of the high-pressure spray heads is generally determined according to the number of the sieve shafts. The quantity of each row of spray heads is determined according to the quantity of the sieve sheets, and each spray head is aligned to the gap between the adjacent sieve sheets during installation, so that the purging effect is ensured. The cleaning time of the roller screen is determined according to the running current of a subordinate coal breaker, when the current is over-alarm, the system sends a shutdown signal to coal source equipment (a coal feeder), and the cleaning equipment is started after time delay to purge the roller screen. The delay is determined according to the running time of the coal flow, and the coal flow can be cleaned after flowing through the roller screen. The system can quickly clean each sieve shaft, blow off materials attached to the sieve shaft, and improve the working efficiency of the conveying system.
As shown in fig. 2, a method for using the roller screen system with automatic cleaning function in the present invention specifically includes: when the running current of the lower equipment of the roller screen, namely the coal crusher, is in an over-alarm state, the DCS control unit controls the coal feeding equipment of the roller screen to stop working, controls the self-cleaning system 3 and the compressed air source 5 to be started, and purges the roller screen. Preferably, after the DCS control unit controls the coal feeding equipment of the roller screen to stop working, the DCS control unit is provided with a delay time, the delay time ensures that the coal flow on the roller screen can completely flow through, and after the delay time is over, namely the coal flow on the roller screen completely flows through, the DCS control unit starts the self-cleaning system 3 and the compressed air source 5 to purge the roller screen.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A roller screen system with an automatic cleaning function is characterized by comprising a roller screen body (2), a self-cleaning system (3), a sealing cover plate (4), a compressed air source (5) and a DCS control unit;
the roller screen body (2) comprises a screen shaft (21) and a screen disc (22) sleeved on the screen shaft (21);
the self-cleaning system (3) comprises a main pipeline (31), a plurality of branch pipelines (32) are communicated with the main pipeline (31), a plurality of spray heads are communicated with the branch pipelines (32), and the spray heads are arranged on one side close to the sieve tray (22);
the free end of the main pipeline (31) and the compressed air source (5) can be connected and disconnected;
the sealing cover plate (4) is connected with the shell of the roller screen body (2);
the self-cleaning system (3) and the compressed air source (5) are electrically connected with the DCS control unit.
2. A roller screen system with automatic cleaning function according to claim 1, characterized in that the sealing cover plate (4) is provided with a plurality of inspection hole doors (41).
3. A roller screen system with automatic cleaning function according to claim 1, characterized in that said several branch ducts (32) are arranged at intervals in sequence along the axial direction of said main duct (31).
4. The roller screen system with automatic cleaning function as claimed in claim 1, wherein said plurality of spray heads are sequentially arranged at intervals along the axial direction of said branch pipe (32).
5. A roller screen system with automatic cleaning according to claim 1, characterized in that the branch ducts (32) are arranged between adjacent screen shafts (21).
6. A roller screen system with automatic cleaning according to claim 1, characterized in that the spray head is arranged between adjacent screen discs (22).
7. The roller screen system with the automatic cleaning function as claimed in claim 1, wherein the vertical distance between the spray head and the screen tray (22) is 20-30 cm.
8. The roller screen system with automatic cleaning function as claimed in claim 1, wherein the pressure of the compressed air sprayed from the spray head is greater than 0.5 MPa.
9. The use method of the roller screen system with the automatic cleaning function as claimed in any one of claims 1 to 8, wherein when the running current of the lower equipment of the roller screen is over-alarm, the DCS control unit controls the coal feeding equipment of the roller screen to stop working, and controls the self-cleaning system (3) and the compressed air source (5) to start to purge the roller screen.
10. The method for using the roller screen system with the automatic cleaning function according to claim 9, wherein after the coal feeding equipment of the roller screen is controlled by the DCS control unit to stop working, when the coal flow on the roller screen completely flows through, the self-cleaning system (3) and the compressed air source (5) are started to perform roller screen purging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210435838.8A CN114798408A (en) | 2022-04-24 | 2022-04-24 | Roller screen system with automatic cleaning function and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210435838.8A CN114798408A (en) | 2022-04-24 | 2022-04-24 | Roller screen system with automatic cleaning function and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114798408A true CN114798408A (en) | 2022-07-29 |
Family
ID=82506783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210435838.8A Pending CN114798408A (en) | 2022-04-24 | 2022-04-24 | Roller screen system with automatic cleaning function and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114798408A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020153286A1 (en) * | 2001-03-06 | 2002-10-24 | Juha Junnila | Method and arrangement for cleaning the screening device of a screen |
| JP2014124602A (en) * | 2012-12-27 | 2014-07-07 | Nippon Steel & Sumitomo Metal | Vibrating sieve device and cleaning method of the same |
| CN104889058A (en) * | 2015-06-17 | 2015-09-09 | 湖南万容科技股份有限公司 | Garbage drum screen with self-cleaning function and cleaning device thereof |
| CN206273388U (en) * | 2016-12-05 | 2017-06-23 | 安徽华星选矿科技有限公司 | A kind of roller picker sweeper |
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| CN212759557U (en) * | 2020-07-27 | 2021-03-23 | 广州泰昌环保科技有限公司 | Slag roller screening device for household garbage incineration power plant |
| CN213793215U (en) * | 2020-07-01 | 2021-07-27 | 广西中烟工业有限责任公司 | Online timing air injection cleaning device |
| CN213792818U (en) * | 2020-10-27 | 2021-07-27 | 洛阳涧光特种装备股份有限公司 | Active coke drum screening machine with screen cleaning device |
| CN213825891U (en) * | 2021-05-12 | 2021-07-30 | 新疆宜化矿业有限公司 | Self-cleaning device for roller screen |
| CN214600376U (en) * | 2021-01-29 | 2021-11-05 | 陕西府州冠宇特种装备制造有限责任公司 | Roller screen convenient to clean for coal mine |
| CN214766732U (en) * | 2021-01-20 | 2021-11-19 | 上海秀明机械设备有限公司 | Tobacco leaf screening plant |
| CN113751305A (en) * | 2021-09-28 | 2021-12-07 | 安徽省东博米业有限公司 | Husked rice screening separator |
| CN215088658U (en) * | 2021-05-20 | 2021-12-10 | 重庆可基混凝土有限公司 | Concrete material sieving mechanism |
-
2022
- 2022-04-24 CN CN202210435838.8A patent/CN114798408A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020153286A1 (en) * | 2001-03-06 | 2002-10-24 | Juha Junnila | Method and arrangement for cleaning the screening device of a screen |
| JP2014124602A (en) * | 2012-12-27 | 2014-07-07 | Nippon Steel & Sumitomo Metal | Vibrating sieve device and cleaning method of the same |
| CN104889058A (en) * | 2015-06-17 | 2015-09-09 | 湖南万容科技股份有限公司 | Garbage drum screen with self-cleaning function and cleaning device thereof |
| CN206273388U (en) * | 2016-12-05 | 2017-06-23 | 安徽华星选矿科技有限公司 | A kind of roller picker sweeper |
| CN210253013U (en) * | 2019-06-13 | 2020-04-07 | 万达集团股份有限公司 | Screening machine for carbon black |
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| CN211756682U (en) * | 2019-12-31 | 2020-10-27 | 安徽恒帆环保科技有限公司 | Sine roller screen |
| CN111451138A (en) * | 2020-05-11 | 2020-07-28 | 华电国际电力股份有限公司邹县发电厂 | Rotary and detachable roller screen shaft cleaning device |
| CN213793215U (en) * | 2020-07-01 | 2021-07-27 | 广西中烟工业有限责任公司 | Online timing air injection cleaning device |
| CN212759557U (en) * | 2020-07-27 | 2021-03-23 | 广州泰昌环保科技有限公司 | Slag roller screening device for household garbage incineration power plant |
| CN213792818U (en) * | 2020-10-27 | 2021-07-27 | 洛阳涧光特种装备股份有限公司 | Active coke drum screening machine with screen cleaning device |
| CN214766732U (en) * | 2021-01-20 | 2021-11-19 | 上海秀明机械设备有限公司 | Tobacco leaf screening plant |
| CN214600376U (en) * | 2021-01-29 | 2021-11-05 | 陕西府州冠宇特种装备制造有限责任公司 | Roller screen convenient to clean for coal mine |
| CN213825891U (en) * | 2021-05-12 | 2021-07-30 | 新疆宜化矿业有限公司 | Self-cleaning device for roller screen |
| CN215088658U (en) * | 2021-05-20 | 2021-12-10 | 重庆可基混凝土有限公司 | Concrete material sieving mechanism |
| CN113751305A (en) * | 2021-09-28 | 2021-12-07 | 安徽省东博米业有限公司 | Husked rice screening separator |
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Application publication date: 20220729 |