CN113102228B - Adjustable environmental protection dust removal shale shaker - Google Patents
Adjustable environmental protection dust removal shale shaker Download PDFInfo
- Publication number
- CN113102228B CN113102228B CN202110401863.XA CN202110401863A CN113102228B CN 113102228 B CN113102228 B CN 113102228B CN 202110401863 A CN202110401863 A CN 202110401863A CN 113102228 B CN113102228 B CN 113102228B
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- screen
- fixedly connected
- screen cloth
- dust
- shell
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- 239000000428 dust Substances 0.000 title claims abstract description 54
- 230000007613 environmental effect Effects 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 26
- 230000002146 bilateral effect Effects 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 7
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000012216 screening Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
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- 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
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4636—Regulation of screen apertures
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- 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
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- 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
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses an adjustable environment-friendly dust removal vibrating screen which comprises a base, wherein a screen shell is connected to the base through a spring, a vibrating mechanism is arranged between the screen shell and the base, two screen mounting seats which are bilaterally symmetrical are arranged in the screen shell, a screen is fixedly connected between the two screen mounting seats, an adjusting device for adjusting screen holes and preventing material clamping is arranged in the screen shell, a dust removal device for removing dust is arranged on the lower side of the screen shell, when a movable screen slides forwards relative to the screen, a blocking object in the screen holes of the screen can be ejected out through protrusions, and meanwhile, due to the special shape of the protrusions, the loss of the protrusions can be reduced.
Description
Technical Field
The invention belongs to the field of environment-friendly equipment, and particularly relates to an adjustable environment-friendly dust removal vibrating screen.
Background
The vibrating screen is a screening machine commonly used in a concentrating mill, and the linear vibrating screen is widely applied, and utilizes the vibration excitation of a vibrating motor as a vibration source to enable materials to be thrown up on a screen and to simultaneously move forwards in a linear manner, the materials uniformly enter a feeding hole of the screening machine from a feeding machine, and oversize products and undersize products of various specifications are generated through a plurality of layers of screen meshes and are respectively discharged from respective outlets; but current shale shaker can produce the dust in the course of the work, causes the influence to staff's health, and the sieve mesh of current shale shaker blocks the material easily simultaneously, influences screening efficiency to the mesh size is unadjustable, and economic suitability is lower, consequently, the linear type shale shaker that can adjust the mesh size and remove dust of waiting to design one kind urgently.
Disclosure of Invention
The invention provides a linear vibrating screen which can adjust the size of screen holes and remove dust in order to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an adjustable nodal pattern environmental protection dust removal shale shaker, includes the base, spring coupling has the screen shell on the base, the screen shell with be provided with vibration mechanism between the base, be provided with two screen cloth mount pads of bilateral symmetry in the screen shell, two fixedly connected with screen cloth between the screen cloth mount pad, be provided with the adjusting device who adjusts the sieve mesh and prevent to block the material in the screen shell, the downside of screen shell is provided with the dust collector who removes dust.
Preferably, adjusting device includes bilateral symmetry fixed connection and is in two dead levers of screen cloth downside, two open two relative sliding trays of opening, every in the dead lever sliding tray sliding connection has two sliding blocks, two the sliding block is close to a terminal surface fixedly connected with connecting rod of the vertical central line of base, two fixedly connected with movable screen cloth between the connecting rod, movable screen cloth with screen cloth downside sliding connection, open at least two movable sieve meshes in the movable screen cloth.
Preferably, each movable sieve pore can be communicated with a sieve pore in the sieve mesh, the left side wall and the right side wall of each movable sieve pore are provided with two bulges from top to bottom, the radian of the front side surface of each bulge is smaller than that of the rear side surface of each bulge, when the movable sieve mesh slides forwards relative to the sieve mesh, the bulges can eject out the plugs in the sieve pores of the sieve mesh, and meanwhile, due to the special shape of the bulges, the bulge loss can be reduced.
Preferably, adjusting device still includes fixed connection and is in the fixed block of screen shell trailing flank, it has the forward power chamber of opening to open in the fixed block, two electric push rods of rear side wall bilateral symmetry fixedly connected with in power chamber, the front side output of electric push rod articulates there is the hinge bar, the hinge bar front end with movable screen cloth rear end fixed connection.
Preferably, the dust removing device comprises a fixed plate fixedly connected to the supporting frame on the lower portion of the base, a collecting box is fixedly connected to the upper side of the fixed plate, a collecting cavity is formed in the collecting box, a dust collecting pipe is fixedly connected to the upper side of the collecting box and communicated with the collecting cavity, a fan set is fixedly connected to the dust collecting pipe, at least two connecting pipes are arranged on the upper end of the dust collecting pipe in a communicated mode, the connecting pipes extend upwards, a suction nozzle is fixedly connected to the upper end of each connecting pipe, a mounting rod is fixedly connected to the side of the sieve shell and fixedly connected with the connecting pipes, the suction nozzle faces a blanking area of the vibrating sieve, and dust generated during blanking can be sucked by the suction nozzle.
Preferably, dust collector still sets up including the intercommunication collect the rearward ash hole of opening of chamber trailing flank, it has the baffle to hinge between the lateral wall about collecting the chamber, the baffle extends backward and runs through the ash hole enters into external space, the baffle can with collect the chamber and divide into two upper and lower cavities that do not communicate.
Preferably, dust collector still includes fixed connection at every the first butt piece of electric putter output downside, first butt piece lower extreme is the arcuation, lateral wall bilateral symmetry sliding connection has two gangbars, every under the power cavity gangbar upper end fixedly connected with second butt piece, second butt piece upper end is the arcuation, second butt piece can with the homonymy first butt piece butt, the cover is equipped with fixed cover on the gangbar, fixed cover downside with be connected with the spring under the power cavity between the lateral wall, the gangbar downwardly extending with the rear end of baffle is articulated.
In summary, the invention has the following advantages:
when the movable screen slides forwards relative to the screen, the bulges can eject the blockage in the screen holes of the screen, and meanwhile, due to the special shape of the bulges, the bulge loss can be reduced.
The suction nozzle faces to a blanking area of the vibrating screen, and the suction nozzle can suck dust generated in blanking.
Through first butt piece second butt piece with the setting of gangbar for when needs adjust the mesh size, when changing the screening material promptly, first butt piece passes through second butt piece drives the gangbar downstream, the gangbar drives the baffle upset makes the baffle becomes the tilt state, the dust of baffle upside passes through the ash hole discharge organism avoids the mixture of different material dust, makes dust utilization ratio reduce.
Drawings
FIG. 1 is a diagram of an embodiment of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;
FIG. 5 is an enlarged view of a portion of FIG. 3 at C;
FIG. 6 is an enlarged view of a portion of FIG. 4 at D;
fig. 7 is a schematic view of the structure of the movable sieve holes 210.
In the figure, a base 101; a screen shell 102; a vibration mechanism 103; a screen mounting base 104; a screen 105; the adjusting device 200; a fixed block 201; a power cavity 202; an electric pushrod 203; a hinge rod 204; a fixing bar 205; a slide groove 206; a slider 207; a connecting rod 208; a movable screen 209; a movable sieve aperture 210; a dust removing device 300; a fixing plate 301; a collection tank 302; a collection chamber 303; an ash outlet 304; a baffle 305; a fan set 306; a dust suction pipe 307; a connecting pipe 308; a suction nozzle 309; a mounting rod 310; a first abutment block 311; a second abutment block 312; a linkage bar 313; a securing sleeve 314; a spring 315.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 7, and the technical solutions of the present invention will be clearly and completely described, 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.
The following orientations are specified: the up, down, left, right, front and rear directions described below correspond to the front, back, left, right, top and bottom directions of the view direction of fig. 1, fig. 1 is a front view of the apparatus of the present invention, and the directions shown in fig. 1 correspond to the front, back, left, right, top and bottom directions of the apparatus of the present invention.
Combine fig. 1 and fig. 3 to show, an adjustable environmental protection dust removal shale shaker, including base 101, spring coupling has screen shell 102 on the base 101, be provided with vibration mechanism 103 between screen shell 102 and the base 101, be provided with two screen cloth mount pads 104 of bilateral symmetry in the screen shell 102, fixedly connected with screen cloth 105 between two screen cloth mount pads 104, base 101, screen shell 102, vibration mechanism 103, screen cloth mount pad 104, screen cloth 105 is prior art, no longer describe repeatedly, be provided with the adjusting device 200 who adjusts the sieve mesh and prevent to block the material in the screen shell 102, the downside of screen shell 102 is provided with the dust collector 300 who removes dust.
As shown in fig. 6, the adjusting device 200 includes two fixing rods 205 which are symmetrically and fixedly connected to the lower side of the screen 105, two sliding grooves 206 with opposite openings are formed in the two fixing rods 205, two sliding blocks 207 are slidably connected to each sliding groove 206, a connecting rod 208 is fixedly connected to one end face of each sliding block 207, which is close to the vertical center line of the base 101, a movable screen 209 is fixedly connected between the two connecting rods 208, the movable screen 209 is slidably connected to the lower side of the screen 105, and at least two movable screen holes 210 are formed in the movable screen 209.
As shown in fig. 2 and 7, each movable sieve hole 210 can be communicated with a sieve hole in the screen 105, two protrusions are arranged on the left side wall and the right side wall of each movable sieve hole 210 from top to bottom, the radian of the front side surface of each protrusion is smaller than that of the rear side surface of each protrusion, when the movable screen 209 slides forwards relative to the screen 105, the protrusions can eject out plugs in the sieve holes of the screen 105, and meanwhile, due to the special shape of the protrusions, the protrusion loss can be reduced.
Referring to fig. 3 and 5, the adjusting device 200 further includes a fixing block 201 fixedly connected to the rear side surface of the screen shell 102, a power cavity 202 with a forward opening is formed in the fixing block 201, two electric push rods 203 are fixedly connected to the left and right of the rear side wall of the power cavity 202 in a bilateral symmetry manner, the electric push rods 203 are in the prior art and are not repeated, an output end of the front side of each electric push rod 203 is hinged to a hinge rod 204, and the front end of each hinge rod 204 is fixedly connected to the rear end of a movable screen 209.
Referring to fig. 1 and 3, the dust removing device 300 includes a fixing plate 301 fixedly connected to a support frame on the lower portion of a base 101, a collecting box 302 is fixedly connected to the upper side of the fixing plate 301, a collecting cavity 303 is formed in the collecting box 302, a dust collecting pipe 307 is fixedly connected to the upper side of the collecting box 302, the dust collecting pipe 307 is communicated with the collecting cavity 303, a fan set 306 is fixedly connected to the dust collecting pipe 307, the fan set 306 is in the prior art and is not described again, at least two connecting pipes 308 are communicated with the upper end of the dust collecting pipe 307, the connecting pipes 308 extend upwards, a suction nozzle 309 is fixedly connected to the upper end of the connecting pipes 308, a mounting rod 310 is fixedly connected to the side of a sieve shell 102, the mounting rod 310 is fixedly connected to the connecting pipes 308, the suction nozzle 309 faces a blanking area of a vibrating screen, and the suction nozzle 309 can suck dust generated during blanking.
As shown in fig. 3, the dust removing device 300 further includes an ash outlet 304 which is communicated with and arranged at the rear side surface of the collecting cavity 303 and has a backward opening, a baffle 305 is hinged between the left side wall and the right side wall of the collecting cavity 303, the baffle 305 extends backward to penetrate through the ash outlet 304 and enter into the external space, and the baffle 305 can divide the collecting cavity 303 into an upper cavity and a lower cavity which are not communicated with each other.
As shown in fig. 3 and 5, the dust removing device 300 further includes a first abutting block 311 fixedly connected to the lower side surface of the output end of each electric pushing rod 203, the lower end of the first abutting block 311 is arc-shaped, the lower side wall of the power cavity 202 is bilaterally and symmetrically slidably connected with two linkage rods 313, the upper end of each linkage rod 313 is fixedly connected with a second abutting block 312, the upper end of the second abutting block 312 is arc-shaped, the second abutting block 312 can abut against the first abutting block 311 on the same side, the linkage rod 313 is sleeved with a fixing sleeve 314, a spring 315 is connected between the lower side surface of the fixing sleeve 314 and the lower side wall of the power cavity 202, and the linkage rod 313 extends downwards and is hinged to the rear end of the baffle 305. Through the setting of first butt joint piece 311, second butt joint piece 312 and gangbar 313 for when needs adjust the mesh size, when changing the screening material promptly, first butt joint piece 311 drives gangbar 313 through second butt joint piece 312 and moves down, and gangbar 313 drives baffle 305 and overturns, makes baffle 305 become the tilt state, and the dust of baffle 305 upside passes through the organism of ash outlet 304 discharge, avoids different material dust to mix, makes dust utilization reduce.
The working principle is as follows: when the vibrating screen is used, the fan set 306 is started, the fan set 306 sucks dust generated in the working process of the vibrating screen into the collecting cavity 303 through the connecting pipe 308 and the suction nozzle 309, and the dust is accumulated on the baffle 305; when the size of the mesh needs to be adjusted by replacing the screening material, the electric push rod 203 is started, the output end of the electric push rod 203 drives the first abutting block 311 to move forward, the first abutting block 311 abuts against the second abutting block 312, so that the second abutting block 312 moves downward, the second abutting block 312 drives the linkage rod 313 to move downward, the linkage rod 313 drives the baffle 305 to turn over, so that the baffle 305 becomes an inclined state, the dust on the upper side of the baffle 305 is discharged out of the machine body through the dust outlet 304, after the first abutting block 311 is moved away from the upper side of the second abutting block 312, the fixing sleeve 314 is reset under the action of the spring 315, so that the baffle 305 is restored to be in a horizontal state again, meanwhile, the output end of the electric push rod 203 drives the hinged rod 204 to move forward, the hinged rod 204 drives the movable screen 209 to move forward, the movable screen 210 in the movable screen 209 slides with the screen holes in the screen 105, so that the screen holes become smaller, and meanwhile, when the movable screen 209 moves, the bulges in the movable sieve holes 210 push out the materials clamped in the sieve holes, so that the sieving efficiency is improved.
It is to be understood that the above-described embodiments are only a few embodiments of the present invention, and not all embodiments. The above examples are only for explaining the present invention and do not constitute a limitation to the scope of protection of the present invention. All other embodiments, which can be derived by those skilled in the art from the above-described embodiments without any creative effort, namely all modifications, equivalents, improvements and the like made within the spirit and principle of the present application, fall within the protection scope of the present invention claimed.
Claims (1)
1. The utility model provides an adjustable nodal pattern environmental protection dust removal shale shaker, includes base (101), spring coupling has screen shell (102) on base (101), screen shell (102) with be provided with vibration mechanism (103) between base (101), be provided with two screen cloth mount pads (104) of bilateral symmetry in screen shell (102), two fixedly connected with screen cloth (105), its characterized in that between screen cloth mount pad (104): be provided with adjusting device (200) of adjusting the sieve mesh and preventing card material in sieve shell (102), the downside of sieve shell (102) is provided with dust collector (300) that removes dust, adjusting device (200) include bilateral symmetry fixed connection two dead levers (205) at screen cloth (105) downside, two open two sliding tray (206) that the opening is relative in two dead lever (205), sliding connection has two sliding block (207) in every sliding tray (206), two sliding block (207) are close to a terminal surface fixedly connected with connecting rod (208) of base (101) vertical center line, two fixedly connected with activity screen cloth (209) between connecting rod (208), activity screen cloth (209) with screen cloth (105) downside sliding connection, at least two activity screen hole (210) have been seted up in activity screen cloth (209), every activity sieve mesh (210) can with sieve mesh intercommunication in screen cloth (105), the lateral wall is provided with two archs from last to down about activity sieve mesh (210), the radian of protruding leading flank is less than the trailing flank radian, works as when activity screen cloth (209) for when screen cloth (105) slide forward, the arch can with the plug in screen cloth (105) sieve mesh is ejecting, simultaneously because bellied special shape, can reduce bellied loss, adjusting device (200) still include fixed block (201) of fixed connection in screen shell (102) trailing flank, set up power chamber (202) that the opening is forward in fixed block (201), the trailing flank bilateral symmetry fixedly connected with two electric push rod (203) of power chamber (202), the front side output of electric push rod (203) articulates there is hinge rod (204), the front end of the hinged rod (204) is fixedly connected with the rear end of the movable screen (209), the dust removing device (300) comprises a fixed plate (301) fixedly connected with a support frame at the lower part of the base (101), the upper side of the fixed plate (301) is fixedly connected with a collecting box (302), a collecting cavity (303) is arranged in the collecting box (302), the upper side of the collecting box (302) is fixedly connected with a dust collecting pipe (307), the dust collecting pipe (307) is communicated with the collecting cavity (303), a fan set (306) is fixedly connected in the dust collecting pipe (307), the upper end of the dust collecting pipe (307) is communicated with at least two connecting pipes (308), the connecting pipes (308) extend upwards, the upper ends of the connecting pipes (308) are fixedly connected with suction nozzles (309), the side of the screen shell (102) is fixedly connected with a mounting rod (310), and the mounting rod (310) is fixedly connected with the connecting pipes (308), the blanking area of suction nozzle (309) towards the shale shaker, the dust that produces when suction nozzle (309) can be with the blanking is absorbed, dust collector (300) still sets up including the intercommunication the ash hole (304) of opening backward of collecting chamber (303) trailing flank, it has baffle (305) to articulate between the lateral wall about collecting chamber (303), baffle (305) extend backward and run through ash hole (304) enter into external space, baffle (305) can be with collect chamber (303) and divide into two upper and lower cavities that do not communicate, dust collector (300) still includes fixed connection at every first butt piece (311) of electric putter (203) output downside, first butt piece (311) lower extreme is the arcuation, lateral wall bilateral symmetry sliding connection has two gangbars (313) under power chamber (202), every gangbar (313) upper end fixed connection has second butt piece (312), second butt joint piece (312) upper end is the arcuation, second butt joint piece (312) can with the homonymy first butt joint piece (311) butt, the cover is equipped with fixed cover (314) on gangbar (313), fixed cover (314) downside with be connected with spring (315) between power cavity (202) the lower lateral wall, gangbar (313) downwardly extending with the rear end of baffle (305) is articulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401863.XA CN113102228B (en) | 2021-04-14 | 2021-04-14 | Adjustable environmental protection dust removal shale shaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110401863.XA CN113102228B (en) | 2021-04-14 | 2021-04-14 | Adjustable environmental protection dust removal shale shaker |
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| Publication Number | Publication Date |
|---|---|
| CN113102228A CN113102228A (en) | 2021-07-13 |
| CN113102228B true CN113102228B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110401863.XA Active CN113102228B (en) | 2021-04-14 | 2021-04-14 | Adjustable environmental protection dust removal shale shaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105597886A (en) * | 2016-03-08 | 2016-05-25 | 杨露萍 | Chinese medical herb smashing and sieving device |
| CN106348057A (en) * | 2016-08-26 | 2017-01-25 | 桐昆集团浙江恒腾差别化纤维有限公司 | Unloading structure of polyester silk raw material powder |
| CN109759310A (en) * | 2019-01-17 | 2019-05-17 | 秦飞龙 | A kind of Soybean production processing of avoidable dust blocking spends miscellaneous equipment |
| CN110203792B (en) * | 2019-06-21 | 2020-03-27 | 台州市椒江预提自动化设备有限公司 | Safe stopping equipment of building construction material lifting machine |
| KR102192663B1 (en) * | 2019-06-26 | 2020-12-17 | 이나라 | White grub sorting device |
| CN111701848B (en) * | 2020-07-23 | 2021-07-09 | 日照市博峰源中药饮片有限公司 | Chinese-medicinal material removes dirt machine |
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Effective date of registration: 20220325 Address after: No.162-1 Gongyuan Road, Fengrun District, Tangshan City, Hebei Province Applicant after: TANGSHAN SENPU MINING EQUIPMENT Co.,Ltd. Address before: 324012 Dongzhou village, Huangjia street, Kecheng District, Quzhou City, Zhejiang Province Applicant before: Quzhou Youwei Environmental Protection Technology Co.,Ltd. |
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