CN113245178A - Grading device for rock and soil particles with different particle sizes - Google Patents
Grading device for rock and soil particles with different particle sizes Download PDFInfo
- Publication number
- CN113245178A CN113245178A CN202110620449.8A CN202110620449A CN113245178A CN 113245178 A CN113245178 A CN 113245178A CN 202110620449 A CN202110620449 A CN 202110620449A CN 113245178 A CN113245178 A CN 113245178A
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- Prior art keywords
- connector
- rock
- discharging
- water pipe
- outer side
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002689 soil Substances 0.000 title claims abstract description 33
- 239000002245 particle Substances 0.000 title claims abstract description 29
- 239000011435 rock Substances 0.000 title abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 230000004323 axial length Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000010878 waste rock Substances 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
- B07B1/18—Drum screens
- B07B1/22—Revolving drums
-
- 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
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
A grading device for rock-soil particles with different particle diameters comprises a rock-soil separating cylinder, a rotation driving mechanism and an angle adjusting mechanism, wherein the rock-soil separating cylinder comprises a main cylinder group, a feeding connector and a discharging connector, the main cylinder group comprises an outer side cylinder, a cylindrical screen group and a high-pressure mesh water pipe, the cylindrical screen group and the high-pressure mesh water pipe are arranged in the outer side cylinder, the feeding port and the discharging port of the outer side cylinder are respectively detachably packaged with the feeding connector and the discharging connector, the centers of the feeding connector and the discharging connector are respectively provided with a water pipe fixing hole, and the discharging connector is provided with a plurality of mutually independent discharging channels; the cylindrical screen group is arranged between the feeding connector and the discharging connector and comprises a plurality of cylindrical screens; the high-pressure mesh water pipe is arranged in the cylindrical screen group; the rotation driving mechanism is supported outside the rock-soil separation barrel; the angle adjusting mechanism is arranged at the bottom of the rotation driving mechanism. The invention has the beneficial effects that: the closed structure can adjust the rotating speed and the inclination angle according to the self property of rock soil.
Description
Technical Field
The invention relates to a grading device for rock and soil particles with different particle sizes.
Background
When underground space engineering is carried out, a huge amount of rock-soil waste rocks are often generated due to blasting, the waste rocks need to be treated, a proper site needs to be selected, and a huge amount of transportation cost needs to be paid. However, most existing separating devices are fixed and unified, have single functions and are not adjustable, and have large outdoor dust emission to destroy the surrounding environment.
Disclosure of Invention
In view of the above problems, the invention aims to provide a grading device for rock and soil particles with different particle sizes, which has a simple structure, is convenient to control, is environment-friendly, efficient and controllable.
In order to achieve the purpose, the technical solution of the invention is as follows:
the invention relates to a grading device for rock and soil particles with different particle diameters, which is characterized in that: comprises a rock-soil separating cylinder, a rotary driving mechanism and an angle adjusting mechanism, wherein the rock-soil separating cylinder comprises a main cylinder group, a feeding connector and a discharging connector,
the main body cylinder group comprises an outer side roller, a cylinder type screen group arranged in the outer side roller and a high-pressure mesh water pipe, wherein a feeding port and a discharging port of the outer side roller are respectively and detachably packaged with a feeding connector and a discharging connector, the centers of the feeding connector and the discharging connector are respectively provided with a water pipe fixing hole for fixing the high-pressure mesh water pipe, and the discharging connector is provided with a plurality of mutually independent discharging channels;
the cylindrical screen set is arranged between the feeding connector and the discharging connector, and comprises a plurality of cylindrical screens which are coaxially sleeved together, and one side of each cylindrical screen close to the high-pressure mesh water pipe is the inner side, and the other side is the outer side; the aperture of the cylindrical screen is gradually reduced from inside to outside, and gaps serving as screening areas are reserved between adjacent cylindrical screens and between the outermost cylindrical screen and the inner cylinder wall of the outer drum; each screening area is correspondingly communicated with a discharge channel;
the high-pressure mesh water pipe is arranged in the cylindrical screen group; two end parts of the high-pressure mesh water pipe are respectively detachably connected with the water pipe fixing holes in the centers of the feeding connector and the discharging connector, and a plurality of high-pressure spray holes are distributed in the high-pressure mesh water pipe along the axial direction;
the rotating driving mechanism is supported outside the rock-soil separating cylinder, and a rotating part of the rotating driving mechanism is connected with an outer roller of the rock-soil separating cylinder and is used for driving the rock-soil separating cylinder to rotate circumferentially around a self central shaft;
the angle adjusting mechanism is arranged at the bottom of the rotary driving mechanism, and an adjusting part of the angle adjusting mechanism is connected with the rotary driving mechanism and used for adjusting the inclination angle of the rock-soil separating cylinder.
Further, the discharge channels are annular channels which are concentrically arranged, each discharge channel is provided with a conveyor belt for outputting materials in the discharge channel, the conveying direction of the conveyor belt is arranged along the axial direction of the discharge channel, and the width direction of the conveyor belt is distributed along the radial direction of the discharge channel.
Further, the rotation driving mechanism comprises a base, a rotating machine and a rotating wheel, wherein an arc-shaped groove used for being supported at the bottom of the outer side roller is formed in the upper portion of the base; the rotating machine is arranged on the base below the main cylinder group, and a rotating shaft of the rotating machine is provided with a rotating wheel; the outer wall of the outer side roller is circumferentially provided with poking teeth, and the rotating wheel is meshed with the poking teeth of the outer side roller and used for driving the main body cylinder group, the feeding connector and the discharging connector to rotate together.
Furthermore, the rotating machine is provided with a rotating speed adjusting device, and the rotating speed can be adjusted according to actual needs.
Further, angle adjustment mechanism is hydraulic lift, just hydraulic lift sets up in the tip that the base is close to the pan feeding connector, just hydraulic lift's lift end with the base is connected.
The invention has the beneficial effects that:
1) the device is a closed separation, is integrated with water washing and separation, has no dust raising and is beneficial to the environment.
2) The device can adjust the rotating speed and the inclination angle of the rotating wheel according to the self properties (density, humidity and the like) of rock soil, thereby improving the separation efficiency as much as possible. For example, when the density of separated rock and soil particles is high, the rotating speed of the rotating wheel can be increased; when the humidity is higher, the inclination angle can be increased.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the main cylinder set of the present invention;
FIG. 3 is a schematic side view of the main cylinder set of the present invention;
FIG. 4 is a schematic view of the feed connector of the present invention;
FIG. 5 is a schematic top view of the present invention inlet connector configuration;
FIG. 6 is a schematic cross-sectional view of a feed connector configuration of the present invention;
FIG. 7 is a schematic view of the tap connector of the present invention;
FIG. 8 is a schematic top view of the tap adapter construction of the present invention;
FIG. 9 is a schematic cross-sectional view of the construction of the tapping connector of the present invention;
FIG. 10 is a schematic view of a second cylindrical screen of the present invention;
FIG. 11 is a schematic view of a first cylindrical screen of the present invention;
FIG. 12 is a schematic view of the high pressure mesh water pipe structure of the present invention;
FIG. 13 is a schematic view of the base structure of the present invention;
FIG. 14 is a schematic top view of the base structure of the present invention;
FIG. 15 is a schematic view of the location of the take-off channel and conveyor of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
With reference to the accompanying drawings:
the main body cylinder group comprises an outer side roller 1, a cylinder type screen group arranged in the outer side roller and a high-pressure mesh water pipe 6, a feeding port and a discharging port of the outer side roller 1 are respectively and detachably packaged with a feeding connector 3 and a discharging connector 2, and the centers of the feeding connector 3 and the discharging connector 2 are respectively provided with a water pipe fixing hole for fixing the high-pressure mesh water pipe 6, namely a first water pipe fixing hole 301 and a second water pipe fixing hole 201; the discharging connector 3 is provided with a plurality of independent discharging channels;
the cylindrical screen set is arranged between the feeding connector 3 and the discharging connector 2, and comprises a plurality of cylindrical screens which are coaxially sleeved together, and one side of the cylindrical screens close to the high-pressure mesh water pipe 6 is the inner side, and the other side is the outer side; the aperture of the cylindrical screen is gradually reduced from inside to outside, and gaps serving as screening areas are reserved between adjacent cylindrical screens and between the outermost cylindrical screen and the inner cylinder wall of the outer drum; each screening area is correspondingly communicated with a discharge channel;
the high-pressure mesh water pipe 6 is arranged in the cylindrical screen group; two end parts of the high-pressure mesh water pipe 6 are respectively detachably connected to the water pipe fixing holes in the centers of the feeding connector 3 and the discharging connector 2, and the high-pressure mesh water pipe 6 is axially provided with a plurality of high-pressure spray holes 61;
the rotating driving mechanism is supported outside the rock-soil separating cylinder, and a rotating part of the rotating driving mechanism is connected with an outer roller of the rock-soil separating cylinder and is used for driving the rock-soil separating cylinder to rotate circumferentially around a self central shaft;
the angle adjusting mechanism 10 is arranged at the bottom of the rotary driving mechanism, and an adjusting part of the angle adjusting mechanism is connected with the rotary driving mechanism and used for adjusting the inclination angle of the rock-soil separating cylinder.
The cylindrical screen group comprises two cylindrical screens which are coaxially sleeved together and are respectively a first cylindrical screen 4 and a second cylindrical screen 5, the aperture of the first cylindrical screen 4 is smaller than that of the second cylindrical screen 5, and the aperture size is determined according to the particle size of geotechnical particles required by actual engineering. The first cylindrical screen 4, the second cylindrical screen 5 and the high-pressure mesh water pipe 6 are not visible from the outside because they are inside the apparatus, and are indicated by broken lines in fig. 1.
The discharging channels are concentrically arranged circular channels and are respectively a coarse aggregate conveying channel 211, a fine aggregate conveying channel 212 and a silt conveying channel 213; the axial length of the discharging channels is gradually reduced from the center to the outside in sequence, so that the discharging holes of the discharging channels form a step-shaped channel opening, each discharging channel is provided with a conveyor belt for outputting materials in the discharging channel, and the conveyor belt is vertically arranged with the axial direction of the discharging channel (as shown in figure 15).
The rotary driving mechanism comprises a base 7, a rotary machine 8 and a rotary wheel 9, wherein an arc-shaped groove 71 used for being supported at the bottom of the outer side roller is formed in the upper part of the base 7; the rotary machine 8 is arranged on the base 7 below the main cylinder group, and a rotating wheel 9 is assembled on a rotating shaft 81 of the rotary machine 8; the outer wall of the outer side roller 1 is circumferentially provided with poking teeth 11, and the rotating wheel 9 is meshed with the poking teeth 11 of the outer side roller 1 and used for driving the main cylinder group, the feeding connector and the discharging connector to rotate together.
The first water pipe fixing hole 301 and the second water pipe fixing hole 201 are threaded holes capable of being in threaded connection with the end portion of the high-pressure mesh water pipe.
The discharging connector 2 is connected with the outer roller 1, the first cylindrical screen 4 and the second cylindrical screen 5 through bolts with reserved threaded holes, and is connected with the high-pressure mesh water pipe 6 through the second water pipe fixing holes 201, coarse aggregate is separated from the circular section of the second cylindrical screen 5 and is conveyed out of the first conveying belt 12a of the coarse aggregate conveying channel 211, fine aggregate is separated from the annular section between the second cylindrical screen 5 and the first cylindrical screen 4 and is conveyed out of the second conveying belt 12b of the middle fine aggregate conveying channel 212, silt slurry is separated from the annular section between the first cylindrical screen 4 and the outer roller 1 and is conveyed out of the third conveying belt 12c matched with the silt slurry conveying channel 213, and the conveying belts are in a vertical relation with the device in space (as shown in fig. 15).
The arc-shaped groove of the base 7 is matched with the bottom of the outer roller 1. The teeth of the rotating wheel 9 are meshed with the toggle teeth 11 of the outer side roller 1, so that the rotating wheel 9 is driven by the rotating machine 8 to drive the outer side roller 1 to rotate around the self central shaft in the circumferential direction, and the main cylinder group, the feeding connector and the discharging connector are driven to rotate together.
Both ends of a rotating shaft 81 of the rotating machine 8 are rotatably supported on the base 7, and the central shaft of the rotating shaft 81 is parallel to the central shaft of the outer roller 1; the rotating shaft 81 is provided with the rotating wheel 9, so that the rotating wheel 9 is driven to rotate, the rotating machine 8 is provided with a rotating speed adjusting device, and rock and soil particles with different particle sizes can be adapted by adjusting the rotating speed of the rotating machine 8.
The angle adjusting mechanism 10 is a hydraulic lifter, the hydraulic lifter is arranged at the end part of the base close to the feeding connector, the lifting end of the hydraulic lifter is connected with the base, and the inclination angle of the whole device is adjusted through lifting.
Main part drum group is rotatory and inclined on one side, and the ground granule atress also removes toward discharge gate department in continuous automation in the separation process, so can get rid of automatically under the tilt state, the big bigger natural acceleration of gravity component of inclination is big more, and discharge velocity is fast more, but can not turn big inclination angle one by one, otherwise the ground granule not have complete separation to accomplish will be discharged, influence product quality, will leave sufficient time for the separation process, let the ground granule thoroughly in grades.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (5)
1. The utility model provides a different particle size ground particle grading plant which characterized in that: comprises a rock-soil separating cylinder, a rotary driving mechanism and an angle adjusting mechanism, wherein the rock-soil separating cylinder comprises a main cylinder group, a feeding connector and a discharging connector,
the main body cylinder group comprises an outer side roller, a cylinder type screen group arranged in the outer side roller and a high-pressure mesh water pipe, wherein a feeding port and a discharging port of the outer side roller are respectively and detachably packaged with a feeding connector and a discharging connector, the centers of the feeding connector and the discharging connector are respectively provided with a water pipe fixing hole for fixing the high-pressure mesh water pipe, and the discharging connector is provided with a plurality of mutually independent discharging channels;
the cylindrical screen set is arranged between the feeding connector and the discharging connector, and comprises a plurality of cylindrical screens which are coaxially sleeved together, and one side of each cylindrical screen close to the high-pressure mesh water pipe is the inner side, and the other side is the outer side; the aperture of the cylindrical screen is gradually reduced from inside to outside, and gaps serving as screening areas are reserved between adjacent cylindrical screens and between the outermost cylindrical screen and the inner cylinder wall of the outer drum; each screening area is correspondingly communicated with a discharge channel;
the high-pressure mesh water pipe is arranged in the cylindrical screen group; two end parts of the high-pressure mesh water pipe are respectively detachably connected with the water pipe fixing holes in the centers of the feeding connector and the discharging connector, and a plurality of high-pressure spray holes are distributed in the high-pressure mesh water pipe along the axial direction;
the rotating driving mechanism is supported outside the rock-soil separating cylinder, and a rotating part of the rotating driving mechanism is connected with an outer roller of the rock-soil separating cylinder and is used for driving the rock-soil separating cylinder to rotate circumferentially around a self central shaft;
the angle adjusting mechanism is arranged at the bottom of the rotary driving mechanism, and an adjusting part of the angle adjusting mechanism is connected with the rotary driving mechanism and used for adjusting the inclination angle of the rock-soil separating cylinder.
2. The grading device for geotechnical particles with different particle diameters according to claim 1, wherein: the material discharging channels are annular channels which are concentrically arranged, each material discharging channel is provided with a conveyor belt used for outputting materials in the material discharging channel, the conveying direction of the conveyor belt is arranged along the axial direction of the material discharging channel, and the width direction of the conveyor belt is distributed along the radial direction of the material discharging channel.
3. The grading device for geotechnical particles with different particle diameters according to claim 2, wherein: the axial length of the discharge channel is gradually reduced from the center to the outside in sequence, so that a discharge hole of the discharge channel forms a stepped channel opening.
4. The grading device for geotechnical particles with different particle diameters according to claim 1, wherein: the rotary driving mechanism comprises a base, a rotary machine and a rotating wheel, wherein an arc-shaped groove used for being supported at the bottom of the outer side roller is formed in the upper part of the base; the rotating machine is arranged on the base below the main cylinder group, and a rotating shaft of the rotating machine is provided with a rotating wheel; the outer wall of the outer side roller is circumferentially provided with poking teeth, and the rotating wheel is meshed with the poking teeth of the outer side roller.
5. The grading device for geotechnical particles with different particle diameters according to claim 3, wherein: the angle adjusting mechanism is a hydraulic lifter, the hydraulic lifter is arranged at the end part of the base close to the feeding connector, and the lifting end of the hydraulic lifter is connected with the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620449.8A CN113245178A (en) | 2021-06-03 | 2021-06-03 | Grading device for rock and soil particles with different particle sizes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620449.8A CN113245178A (en) | 2021-06-03 | 2021-06-03 | Grading device for rock and soil particles with different particle sizes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113245178A true CN113245178A (en) | 2021-08-13 |
Family
ID=77186182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110620449.8A Pending CN113245178A (en) | 2021-06-03 | 2021-06-03 | Grading device for rock and soil particles with different particle sizes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113245178A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113941491A (en) * | 2021-10-19 | 2022-01-18 | 米易锦秀机械制造有限公司 | Titanium fine separation selection round roller screen |
| CN115090525A (en) * | 2022-08-25 | 2022-09-23 | 江苏耀海生物制药有限公司 | Y type filter equipment with filter screen clearance function |
| CN116174286A (en) * | 2023-03-06 | 2023-05-30 | 中电建路桥集团有限公司 | Coarse and fine particle separation equipment and method suitable for substrate dredging |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3028225B1 (en) * | 1998-11-26 | 2000-04-04 | ナカヤ実業株式会社 | Adhesive mud cleaning equipment |
| CN101433877A (en) * | 2007-11-17 | 2009-05-20 | 刘奎兴 | Hierarchical water washing stone crusher |
| CN101847286A (en) * | 2010-05-27 | 2010-09-29 | 浙江工业大学 | Roller type coin separator |
| CN205236360U (en) * | 2015-12-31 | 2016-05-18 | 长安大学 | Rotation type stirring station multilayer screening plant |
| CN110639790A (en) * | 2019-08-24 | 2020-01-03 | 安徽友邦新材料有限公司 | Ore washer |
-
2021
- 2021-06-03 CN CN202110620449.8A patent/CN113245178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3028225B1 (en) * | 1998-11-26 | 2000-04-04 | ナカヤ実業株式会社 | Adhesive mud cleaning equipment |
| CN101433877A (en) * | 2007-11-17 | 2009-05-20 | 刘奎兴 | Hierarchical water washing stone crusher |
| CN101847286A (en) * | 2010-05-27 | 2010-09-29 | 浙江工业大学 | Roller type coin separator |
| CN205236360U (en) * | 2015-12-31 | 2016-05-18 | 长安大学 | Rotation type stirring station multilayer screening plant |
| CN110639790A (en) * | 2019-08-24 | 2020-01-03 | 安徽友邦新材料有限公司 | Ore washer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113941491A (en) * | 2021-10-19 | 2022-01-18 | 米易锦秀机械制造有限公司 | Titanium fine separation selection round roller screen |
| CN115090525A (en) * | 2022-08-25 | 2022-09-23 | 江苏耀海生物制药有限公司 | Y type filter equipment with filter screen clearance function |
| CN115090525B (en) * | 2022-08-25 | 2022-11-18 | 江苏耀海生物制药有限公司 | Y type filter equipment with filter screen clearance function |
| CN116174286A (en) * | 2023-03-06 | 2023-05-30 | 中电建路桥集团有限公司 | Coarse and fine particle separation equipment and method suitable for substrate dredging |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210813 |
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| RJ01 | Rejection of invention patent application after publication |