CN111974046A - Wastewater treatment device for down feather processing - Google Patents

Wastewater treatment device for down feather processing Download PDF

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Publication number
CN111974046A
CN111974046A CN202010786935.2A CN202010786935A CN111974046A CN 111974046 A CN111974046 A CN 111974046A CN 202010786935 A CN202010786935 A CN 202010786935A CN 111974046 A CN111974046 A CN 111974046A
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CN
China
Prior art keywords
bin
filter
groups
water storage
servo motor
Prior art date
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.)
Pending
Application number
CN202010786935.2A
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Chinese (zh)
Inventor
陈琨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Xinqiao Down & Down Co Ltd
Original Assignee
Anhui Xinqiao Down & Down Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui Xinqiao Down & Down Co Ltd filed Critical Anhui Xinqiao Down & Down Co Ltd
Priority to CN202010786935.2A priority Critical patent/CN111974046A/en
Publication of CN111974046A publication Critical patent/CN111974046A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/70Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention discloses a wastewater treatment device for down feather processing, which comprises a water storage bin, wherein one side of the bottom of the water storage bin is provided with an electromagnetic valve, one side of the top of the water storage bin is provided with a filtering bin, the filtering bin is mutually communicated with the interior of the water storage bin, a servo motor is arranged at the middle position of the top of the water storage bin, which is far away from one side of the filtering bin, the output end of the servo motor is provided with a gear, two ends of the interior of the filtering bin are provided with three groups of sliding grooves, the interiors of the two groups of sliding grooves at the same end are provided with a filtering screen plate together, one side of the filtering screen plate extends to the exterior of the filtering bin, and one side; the device disclosed by the invention filters down feather and particulate impurities in the wastewater through three groups of filter screen plates with different apertures, so that an operator can conveniently clean the down feather, the down feather is recycled and reused, and the production consumption is reduced.

Description

Wastewater treatment device for down feather processing
Technical Field
The invention relates to the technical field of down feather processing equipment, in particular to a wastewater treatment device for down feather processing.
Background
The down processing comprises the working procedures of material selection, dust removal, cleaning, dehydration, drying, cooling and the like; waste water is generated in the down feather cleaning process, and is directly discharged by factories and enterprises, so that the environment is polluted, water resources are wasted, and the down feather is possibly mixed in the waste water, so that the raw material consumption is overlarge; most filter plates are manually cleaned, so that the efficiency is low; and waste water is at the transmission in-process, and impurity can cause the jam to the filter, and then leads to the normal transmission of waste water, is difficult to guarantee the normal operating of device.
Disclosure of Invention
The invention aims to provide a wastewater treatment device for down feather processing, which aims to solve the problems that the prior down feather in the background art is directly discharged by factories and enterprises, so that the environment is polluted, water resources are wasted, and down feather is possibly mixed in the wastewater, so that the raw material consumption is overlarge; most filter plates are manually cleaned, so that the efficiency is low; and in the process of transferring the waste water, impurities can block the filter plate, so that the waste water is transferred normally, and the normal operation of the device is difficult to ensure.
In order to achieve the purpose, the invention provides the following technical scheme: a wastewater treatment device for down feather processing comprises a water storage bin, wherein one side of the bottom of the water storage bin is provided with an electromagnetic valve, one side of the top of the water storage bin is provided with a filter bin, the filter bin is communicated with the interior of the water storage bin, a servo motor is arranged at the middle position of the top of the water storage bin, which is far away from one side of the filter bin, the output end of the servo motor is provided with a gear, two ends of the interior of the filter bin are provided with three groups of chutes, the interiors of the two groups of chutes at the same end are provided with a filter screen plate together, one side of the filter screen plate extends to the exterior of the filter bin, one side of the filter screen plate, which extends to the exterior of the filter bin, is provided with a sealing plate, one side of the sealing plate, which is far away from the filter screen plate, the rack is meshed with the servo motor, the bottom of one side, close to the servo motor, of the filter bin is provided with a through hole, the rack is matched with the through hole, three groups of U-shaped limiting plates are evenly arranged on one side, far away from the servo motor, of the filter bin, the U-shaped limiting plates are matched with the filter screen plates, three groups of rotating shafts B are arranged on one side, close to the servo motor, of the filter bin, the rotating shafts B are located under the filter screen plates respectively, the rotating shafts B extend to the outside of the filter bin, three groups of impact assemblies are arranged on two sides of the filter bin, belt pulleys are arranged on one side, far away from the servo motor, of the outer sides of the rotating shafts B, belts are sleeved on the outer sides of the belt pulleys, a group of rotating shafts B is provided with a rotating shaft A on one side, far away from the rotating, the utility model discloses a water storage bin, including filter storehouse, feed hopper, water storage bin, control panel, solenoid valve and servo motor, the intermediate position department at filter storehouse top is provided with the feed hopper, and the feed hopper communicates with the inside of filtering the storehouse each other, the intermediate position department at the positive one end top of water storage bin is provided with control panel, control panel passes through the wire and is connected with solenoid valve and servo motor electricity respectively.
Preferably, the striking subassembly includes cam, striking piece, spring, sleeve pipe, litter and striking pearl, the axis of rotation B outside is located the inside bilateral symmetry of filter storehouse and is provided with the cam, the inside bilateral symmetry of filter storehouse is provided with three sets of sleeves, sheathed tube inside is provided with the litter rather than mutually supporting, the bottom of litter is provided with the striking piece, the bottom in the litter outside is provided with the spring, and the top and the sleeve pipe interconnect of spring, striking piece and the mutual adaptation of cam, the top of litter all is provided with the striking pearl.
Preferably, the four corners of the bottom of the water storage bin are provided with brake type universal wheels, and a cover plate is arranged in the middle of one end of the front face of the water storage bin.
Preferably, the top of one side of the feed hopper is hinged with a sealing cover.
Preferably, one side of one end of the front surface of the filter bin is hinged with a bin door.
Preferably, a rubber sleeve is arranged on the outer side of the impact block.
Preferably, the aperture of the three groups of filter screen plates is gradually reduced from top to bottom.
Compared with the prior art, the invention has the beneficial effects that: the wastewater treatment device for down feather processing;
1. down feather and particulate matter impurities in the wastewater are filtered through three groups of filter screen plates with different apertures, so that operators can clean the down feather and the particulate matter impurities conveniently, the down feather is recycled and reused, and the production consumption is reduced;
2. through the mutual matching of the impact components, the bottoms of the three groups of filter screen plates can be impacted, so that the filter screen plates are prevented from being blocked, and the normal operation of the wastewater treatment device is ensured;
3. through mutually supporting of gear, servo motor, rack, through-hole, connecting plate A, connecting plate B, through a set of drive power, shift out three groups of filter plate simultaneously, need not the manual work and open and operate, efficiency can improve.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is an enlarged view of fig. 1 at a.
In the figure: 1. a water storage bin; 2. an electromagnetic valve; 3. a gear; 4. a servo motor; 5. a rack; 6. a through hole; 7. a connecting plate A; 8. a sealing plate; 9. a connecting plate B; 10. a filter screen plate; 11. a chute; 12. a feed hopper; 13. a filtering bin; 14. a U-shaped limiting plate; 15. a rotating shaft A; 16. a crank; 17. a belt pulley; 18. a belt; 19. a control panel; 20. a rotating shaft B; 201. a cam; 202. an impact block; 203. a spring; 204. a sleeve; 205. a slide rod; 206. impact the beads.
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.
Referring to fig. 1-3, the present invention provides an embodiment: a waste water treatment device for down feather processing comprises a water storage bin 1, wherein one side of the bottom of the water storage bin 1 is provided with an electromagnetic valve 2 for discharging filtrate, one side of the top of the water storage bin 1 is provided with a filter bin 13, the filter bin 13 is communicated with the inside of the water storage bin 1, a servo motor 4 is arranged at the middle position of one side of the top of the water storage bin 1, which is far away from the filter bin 13, the output end of the servo motor 4 is provided with a gear 3, two ends of the inside of the filter bin 13 are provided with three groups of chutes 11, the insides of the two groups of chutes 11 at the same end are provided with a filter screen plate 10 together, one side of the filter screen plate 10 extends to the outside of the filter bin 13, one side of the filter screen plate 10, which extends to the outside of the filter bin 13, is provided with a sealing plate 8, an opening for moving out the filter screen plate 10 can be plugged to avoid water leakage, one side of the sealing, the bottom of the connecting plate A7 is provided with a rack 5, the rack 5 is meshed with the servo motor 4, the bottom of one side of the filter bin 13 close to the servo motor 4 is provided with a through hole 6, the rack 5 is matched with the through hole 6, one side of the interior of the filter bin 13 far away from the servo motor 4 is uniformly provided with three groups of U-shaped limiting plates 14, the U-shaped limiting plates 14 are all matched with the filter screen plate 10, one side of the interior of the filter bin 13 close to the servo motor 4 is provided with three groups of rotating shafts B20, the three groups of rotating shafts B20 are respectively positioned under the filter screen plate 10, the three groups of rotating shafts B20 all extend to the exterior of the filter bin 13, two sides of the interior of the filter bin 13 are provided with three groups of impact assemblies, one side of the outer side of the rotating shaft B20 far away from the servo motor 4 is provided with a belt pulley 17, the outer, the crank 16 is arranged on one side, away from the rotating shaft B20, of the rotating shaft A15, the feeding hopper 12 is arranged in the middle of the top of the filtering bin 13, the feeding hopper 12 is communicated with the inside of the filtering bin 13, the control panel 19 is arranged in the middle of the top of one end of the front face of the water storage bin 1, and the control panel 19 is electrically connected with the electromagnetic valve 2 and the servo motor 4 through conducting wires.
The control panel 19, the electromagnetic valve 2 and the servo motor 4 in the device are the prior art, and the composition structure and the connection mode of the device are completely the same as those of the prior device.
Further, the striking component comprises a cam 201, a striking block 202, a spring 203, sleeves 204, a sliding rod 205 and striking beads 206, the cams 201 are symmetrically arranged on two sides of the outer side of the rotating shaft B20 inside the filter bin 13, three groups of sleeves 204 are symmetrically arranged on two sides of the inner side of the filter bin 13, the sliding rod 205 matched with the sleeves 204 is arranged inside the sleeves 204, the striking block 202 is arranged at the bottom of the sliding rod 205, the spring 203 is arranged at the bottom of the outer side of the sliding rod 205, the top of the spring 203 is connected with the sleeves 204, the striking block 202 is matched with the cam 201, and the striking beads 206 are arranged at the top of the sliding rod 205, so that the bottoms of the three groups of filter screen plates 10 can be struck, the filter screen plates 10 are prevented from being blocked, and the normal operation of.
Furthermore, the four corners of the bottom of the water storage bin 1 are provided with brake type universal wheels, and a cover plate is arranged in the middle of one end of the front face of the water storage bin 1, so that the inside of the water storage bin 1 can be cleaned conveniently.
Further, the top of one side of the feed hopper 12 is hinged with a sealing cover to seal the internal environment of the filter bin 13.
Furthermore, one side of one end of the front surface of the filter bin 13 is hinged with a bin door, so that the operation is convenient.
Further, the rubber sleeve is arranged on the outer side of the impact block 202, so that the sound is small during impact.
Further, three groups of filter screen boards 10 are from last to aperture degressive down step by step, through the filter screen board 10 of three different apertures of group, filter eiderdown and particulate matter impurity in the waste water to be convenient for operating personnel to clear up, retrieve the eiderdown, utilize again, reduced production consumption.
The working principle is as follows: when the device is used, the device is placed at a specified position, the power supply is switched on, the control panel 19 is switched on, wastewater is firstly injected into the filtering bin 13 through the feed hopper 12, down feather doped in the wastewater can be filtered through the uppermost filtering screen plate 10, and the lower two groups of filtering screen plates 10 can respectively filter particulate matters and impurities in the wastewater;
in the liquid discharging process, if the inside of the chute 11 is blocked, an operator can drive the rotating shaft A15 to rotate by shaking the crank 16, drive one group of belt pulleys 17 to rotate through the rotating shaft A15, drive the belt 18 and the other two groups of belt pulleys 17 to rotate through one group of belt pulleys 17, further drive the filter screen plate 10 to rotate, drive the cam 201 to rotate through the rotating shaft B20, drive the slide rod 205 to move upwards when the bulge of the cam 201 impacts the impact block 202, further compress the spring 203, move the slide rod 205 upwards, drive the impact bead 206 to impact the filter screen plate 10, further shake the filter screen plate 10 to avoid blocking, and reset the position of the impact block 202 through the elastic restoring force of the spring 203 after the cam 201 is turned over;
servo motor 4 is opened to accessible control panel 19, drive gear 3 through servo motor 4 and rotate, it removes to assigned position department to drive rack 5 through gear 3, and then drive through-hole 6 and connecting plate B9 with three inside that filter plate 10 moved out filtration storehouse 13 on spout 11 of group, so that operating personnel, impurity after filtering is cleared up, can carry out the shutoff to the opening part that filters the removal of plate 10 through closing plate 8, in order to avoid leaking, open the apron and can clear up the bottom in impoundment storehouse 1, can discharge filtrating through solenoid valve 2.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims (7)

1. The utility model provides a waste water treatment device is used in eiderdown processing, includes retaining storehouse (1), its characterized in that: an electromagnetic valve (2) is arranged on one side of the bottom of the water storage bin (1), a filter bin (13) is arranged on one side of the top of the water storage bin (1), the filter bin (13) is communicated with the interior of the water storage bin (1), a servo motor (4) is arranged at the middle position of one side, away from the filter bin (13), of the top of the water storage bin (1), a gear (3) is arranged at the output end of the servo motor (4), three groups of sliding grooves (11) are arranged at two ends of the interior of the filter bin (13), a filter screen plate (10) is arranged inside two groups of sliding grooves (11) at the same end, one side of the filter screen plate (10) extends to the exterior of the filter bin (13), a sealing plate (8) is arranged on one side, extending to the exterior of the filter bin (13), and a connecting plate B (9) is arranged on one side, away from the filter screen plate (, and three groups one side of keeping away from filter plate (10) of connecting plate B (9) is provided with connecting plate A (7) jointly, the bottom of connecting plate A (7) is provided with rack (5), rack (5) and servo motor (4) intermeshing, the bottom of crossing filter bin (13) and being close to servo motor (4) one side is provided with through-hole (6), and rack (5) and through-hole (6) looks mutual adaptation, it evenly is provided with three groups of U type limiting plates (14) to cross the inside one side of keeping away from servo motor (4) of filter bin (13), U type limiting plate (14) all with filter plate (10) looks mutual adaptation, it is provided with three groups of axis of rotation B (20) to cross the inside one side of being close to servo motor (4) of filter bin (13), and three groups axis of rotation B (20) are located respectively under filter plate (10), three groups axis of rotation B (20) all extend to the outside of filtering bin (13), the two sides inside the filter bin (13) are provided with three groups of striking components, one side of the outer side of the rotating shaft B (20) far away from the servo motor (4) is provided with a belt pulley (17), the outer sides of the three groups of belt pulleys (17) are sleeved with a belt (18) together, one side of the rotating shaft B (20) far away from the servo motor (4) is provided with a rotating shaft A (15), a crank handle (16) is arranged on one side of the rotating shaft A (15) far away from the rotating shaft B (20), a feed hopper (12) is arranged in the middle of the top of the filtering bin (13), the feed hopper (12) is communicated with the interior of the filtering bin (13), a control panel (19) is arranged in the middle of the top of one end of the front surface of the water storage bin (1), the control panel (19) is electrically connected with the electromagnetic valve (2) and the servo motor (4) through wires respectively.
2. The wastewater treatment device for down feather processing as set forth in claim 1, wherein: the striking subassembly includes cam (201), striking piece (202), spring (203), sleeve pipe (204), litter (205) and striking pearl (206), the axis of rotation B (20) outside is located and filters inside bilateral symmetry in storehouse (13) and is provided with cam (201), filter the inside bilateral symmetry in storehouse (13) and be provided with three sets of sleeve pipes (204), the inside of sleeve pipe (204) is provided with litter (205) rather than mutually supporting, the bottom of litter (205) is provided with striking piece (202), the bottom in litter (205) outside is provided with spring (203), and the top and sleeve pipe (204) interconnect of spring (203), striking piece (202) and cam (201) mutual adaptation, the top of litter (205) all is provided with striking pearl (206).
3. The wastewater treatment device for down feather processing as set forth in claim 1, wherein: the four corners of the bottom of the water storage bin (1) are provided with brake type universal wheels, and a cover plate is arranged in the middle of one end of the front face of the water storage bin (1).
4. The wastewater treatment device for down feather processing as set forth in claim 1, wherein: the top of one side of the feed hopper (12) is hinged with a sealing cover.
5. The wastewater treatment device for down feather processing as set forth in claim 1, wherein: one side of one end of the front surface of the filtering bin (13) is hinged with a bin door.
6. The wastewater treatment device for down feather processing as claimed in claim 2, wherein: and a rubber sleeve is arranged on the outer side of the impact block (202).
7. The wastewater treatment device for down feather processing as claimed in claim 2, wherein: the aperture of the three groups of filter screen plates (10) is gradually reduced from top to bottom.
CN202010786935.2A 2020-08-07 2020-08-07 Wastewater treatment device for down feather processing Pending CN111974046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010786935.2A CN111974046A (en) 2020-08-07 2020-08-07 Wastewater treatment device for down feather processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010786935.2A CN111974046A (en) 2020-08-07 2020-08-07 Wastewater treatment device for down feather processing

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Publication Number Publication Date
CN111974046A true CN111974046A (en) 2020-11-24

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CN202010786935.2A Pending CN111974046A (en) 2020-08-07 2020-08-07 Wastewater treatment device for down feather processing

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112719634A (en) * 2020-12-25 2021-04-30 苏州恒吴汽车零部件科技有限公司 Laser cutting machine of automobile parts production usefulness
CN112877816A (en) * 2021-01-13 2021-06-01 李爱超 Down feather recycling device
CN113069830A (en) * 2021-05-06 2021-07-06 陆娇桂 Vibrations formula has sewage treatment device of filtering mechanism
CN113103646A (en) * 2021-04-30 2021-07-13 河南应用技术职业学院 Chinese herbal medicine active ingredient extraction element

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208810517U (en) * 2018-09-20 2019-05-03 江西岚洁梦地毯家饰有限公司 A kind of carpet processes raw material screening plant

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208810517U (en) * 2018-09-20 2019-05-03 江西岚洁梦地毯家饰有限公司 A kind of carpet processes raw material screening plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112719634A (en) * 2020-12-25 2021-04-30 苏州恒吴汽车零部件科技有限公司 Laser cutting machine of automobile parts production usefulness
CN112877816A (en) * 2021-01-13 2021-06-01 李爱超 Down feather recycling device
CN113103646A (en) * 2021-04-30 2021-07-13 河南应用技术职业学院 Chinese herbal medicine active ingredient extraction element
CN113069830A (en) * 2021-05-06 2021-07-06 陆娇桂 Vibrations formula has sewage treatment device of filtering mechanism

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Application publication date: 20201124