CN110075600B - Flushing device of tilting pan vacuum filter - Google Patents
Flushing device of tilting pan vacuum filter Download PDFInfo
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- CN110075600B CN110075600B CN201910442410.4A CN201910442410A CN110075600B CN 110075600 B CN110075600 B CN 110075600B CN 201910442410 A CN201910442410 A CN 201910442410A CN 110075600 B CN110075600 B CN 110075600B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
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Abstract
The invention relates to the technical field of vacuum filters, and discloses a flushing device of a tilting pan vacuum filter, which comprises a base, wherein the upper end of the base is fixedly connected with a U-shaped supporting plate, the lower end of the horizontal part of the U-shaped supporting plate and the upper end of the base are rotatably connected with the same reciprocating screw rod through a ball bearing, the rod wall of the reciprocating screw rod is in threaded connection with a threaded ring, the lower rod wall of the reciprocating screw rod is fixedly sleeved with a first driven helical gear, the outer wall of the vertical part of the U-shaped supporting plate is fixedly connected with a first motor, the output shaft of the first motor penetrates through the side wall of the U-shaped supporting plate through a through hole and is fixedly connected with a first driving helical gear meshed with the first driven helical gear, the upper end of the threaded ring is symmetrically and fixedly connected with two connecting rods penetrating through the horizontal part of the U-shaped supporting plate through the through holes, and the upper ends of the two connecting rods are fixedly connected with the same supporting block. The flushing device of the tilting pan vacuum filter has the advantages of being rapid and convenient to clean the filter pan and saving labor.
Description
Technical Field
The invention relates to the technical field of vacuum filters, in particular to a flushing device of a tilting pan vacuum filter.
Background
Along with the increasing requirements of the production scale of various industries in China on the large scale of equipment, the solid-liquid separation unit generally exists in the production flow of various industries, so that the filtering equipment which is suitable for large scale and can better and stably operate is the best choice, and compared with the all-steel structure tilting disc vacuum filter which can be continuously produced, is simple and convenient to operate and better in filter medium regeneration, the all-steel structure tilting disc vacuum filter is suitable for the large scale requirement, the problem of the structure, the process and the manufacturing of the equipment needs to be solved for large scale, the service performance of each part is kept stable along with the large scale, and meanwhile, the whole machine stably operates. At present, the large-scale tilting pan filter mainly has the problems that a bearing riding wheel is worn quickly and a bearing is corroded, the tilting pan action is slightly out of control and disconnected when the gravity center is vertical to a filter disc shaft, and the collision of tilting pan fork rollers exists, so that the structure and parameters of each part of the tilting pan filter are required to be adjusted.
At present, the domestic tilting tray vacuum filter applied to the solid-liquid separation industry needs to take down a filter tray for cleaning in long-time use, most of the tilting tray vacuum filters are cleaned manually at present, time and labor are wasted, the cleaning efficiency is low, cleaning is not thorough enough, and use is influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a flushing device of a tilting pan vacuum filter, which has the advantages of rapidness and convenience in cleaning a filter pan and labor saving, and solves the problems that most of the prior flushing devices are manually cleaned, time and labor are wasted, the cleaning efficiency is low, the cleaning is not thorough enough, and the use is influenced.
(II) technical scheme
In order to realize the purposes of quickly and conveniently cleaning the filter disc and saving labor force, the invention provides the following technical scheme: a flushing device of a tilting pan vacuum filter comprises a base, wherein the upper end of the base is fixedly connected with a U-shaped supporting plate, the lower end of the horizontal part of the U-shaped supporting plate and the upper end of the base are rotatably connected with a same reciprocating screw rod through a ball bearing, the rod wall of the reciprocating screw rod is in threaded connection with a threaded ring, the lower rod wall of the reciprocating screw rod is fixedly sleeved with a first driven helical gear, the outer wall of the vertical part of the U-shaped supporting plate is fixedly connected with a first motor, the output shaft of the first motor penetrates through the side wall of the U-shaped supporting plate through a through hole and is fixedly connected with a first driving helical gear meshed with the first driven helical gear, the upper end of the threaded ring is symmetrically and fixedly connected with two connecting rods penetrating through the horizontal part of the U-shaped supporting plate through a through hole, the upper ends of the two connecting rods are fixedly connected with a same fixing groove, the side wall of the supporting block is provided with a rotating rod through the ball bearing, the water-saving device is characterized in that a driven gear is fixedly sleeved on the rod wall of the rotating rod, a second motor is fixedly connected to the upper end of the supporting block, an output shaft of the second motor is fixedly connected with a driving gear meshed with the driven gear, one end of the rotating rod is fixedly connected with a U-shaped fixing plate, the lower end of the U-shaped fixing plate is fixedly connected with a first U-shaped clamping plate, the upper end of the U-shaped fixing plate is provided with a through hole, an extension rod is movably sleeved in the through hole, the lower end of the extension rod is fixedly connected with a second U-shaped clamping plate corresponding to the first U-shaped clamping plate, the upper end of the U-shaped fixing plate is fixedly clamped with the extension rod through a clamping mechanism, the upper end of the base is also fixedly connected with a water storage tank, the side wall of the water storage tank is fixedly connected with a water spray head through a support, the upper end of the water storage tank is also fixedly connected with a water pump, and a water inlet of the water pump is fixedly communicated with the water storage tank through a water inlet pipe, the water outlet of the water pump is fixedly communicated with the water spraying head through a water outlet pipe;
the clamping mechanism comprises a cylindrical groove formed in the inner wall of the through hole, a clamping rod is fixedly connected to the bottom of the cylindrical groove through a thrust spring, a clamping groove corresponding to the clamping rod is formed in the rod wall of the extension rod, a pull rod is fixedly connected to one end, located in the cylindrical groove, of the clamping rod, one end, far away from the clamping rod, of the pull rod extends out of the U-shaped fixing plate through the through hole, and a pull plate is fixedly connected to one end of the pull rod;
the base is of a hollow structure, a positioning plate is fixedly connected to the inner wall of the base, a through hole is formed in the center of the positioning plate, a threaded cylinder is rotatably sleeved in the through hole through a ball bearing, a second driven helical gear is fixedly sleeved on the outer wall of the threaded cylinder, a third motor is fixedly connected to the upper end of the positioning plate, an output shaft of the third motor is fixedly connected with a second driving helical gear meshed with the second driven helical gear, a lifting screw is connected to the threaded cylinder in a threaded manner, a lifting plate is fixedly connected to the lower end of the lifting screw, and universal wheels are fixedly connected to four corners of the bottom of the lifting plate;
the side wall of the threaded ring is symmetrically and fixedly connected with two first limiting sliding blocks, and the vertical part of the U-shaped supporting plate is provided with a first limiting sliding groove matched with the first limiting sliding blocks;
the side wall of the lifting plate is uniformly and fixedly connected with a plurality of second limiting sliding blocks, and the inner wall of the base is provided with second limiting sliding grooves matched with the second limiting sliding blocks;
and the rod wall at one end of the clamping rod, which is positioned in the cylindrical groove, is symmetrically and fixedly connected with two third limiting slide blocks, and the inner wall of the cylindrical groove is provided with third limiting slide grooves matched with the third limiting slide blocks.
Preferably, the upper end of the lifting screw is fixedly connected with a limiting plate.
(III) advantageous effects
Compared with the prior art, the invention provides a flushing device of a tilting pan vacuum filter, which has the following beneficial effects:
1. this tilting disk vacuum filter's washing unit, when clearing up the filter disc, block the filter disc earlier in first U-shaped cardboard, push down the extension rod again, the extension rod pushes down the upper end joint to the filter disc with second U-shaped cardboard, thrust spring pushes out the kelly and makes kelly and draw-in groove block can realize the high-speed joint to the filter disc outside the cylinder groove, and pulling arm-tie when needs take out the filter disc, utilize the pull rod to pull out the kelly and can relieve the spacing locking to the extension rod outside the draw-in groove, can realize the quick assembly disassembly to the filter disc, convenient to use.
2. This flushing device of tilting disk vacuum filter, carry the water in the water storage box to sprinkler bead department blowout through the water pump, start first motor, first motor drives first initiative helical gear and rotates, utilize the meshing of first initiative helical gear and first driven helical gear to drive reciprocal lead screw and rotate, make the screw thread ring drive the supporting shoe through the connecting rod through the threaded connection effect of reciprocal lead screw and screw thread ring again and reciprocate, and then drive the filter disc back and forth movement from top to bottom, restart the second motor, the second motor drives the driving gear and rotates, utilize the meshing of driving gear and driven gear to drive the bull stick and rotate and then drive the filter disc and rotate, can drive the filter disc and be rotary motion, can carry out omnidirectional cleaning action to the filter disc, the cleaning efficiency is greatly improved, the labour has been saved.
3. This tilting pan vacuum filter's washing unit, when needs remove the device, start the third motor, the third motor drives the rotation of second initiative helical gear, the meshing effect that utilizes second initiative helical gear and the driven helical gear of second drives a screw section of thick bamboo and rotates, the removal that can be convenient for the device outside the base is released with the universal wheel to the threaded connection effect of rethread screw section of thick bamboo and lifting screw makes the lifter plate, and control the third motor reversal and can retrieve the universal wheel in the base when not needing to remove, the problem that the mobility of universal wheel influences the firm placing of device has been avoided.
Drawings
FIG. 1 is a schematic structural view of a flushing device of a tilting pan vacuum filter provided by the invention;
FIG. 2 is an enlarged view of a portion A of the flushing device of the tilting pan vacuum filter in FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of a portion B of the flushing device of the tilting pan vacuum filter in FIG. 1 according to the present invention;
FIG. 4 is an enlarged view of a part C of the flushing device of the tilting pan vacuum filter in FIG. 1 according to the present invention.
In the figure: the automatic lifting device comprises a base 1, a U-shaped supporting plate 2, a reciprocating screw rod 3, a threaded ring 4, a first driven helical gear 5, a first motor 6, a first driving helical gear 7, a connecting rod 8, a supporting block 9, a rotating rod 10, a driven gear 11, a second motor 12, a driving gear 13, a U-shaped fixing plate 14, a first U-shaped clamping plate 15, an extension rod 16, a second U-shaped clamping plate 17, a universal wheel 18, a water storage tank 19, a bracket 20, a water spray head 21, a water pump 22, a cylindrical groove 23, a thrust spring 24, a clamping rod 25, a clamping groove 26, a pull rod 27, a pull plate 28, a positioning plate 29, a threaded cylinder 30, a second driven helical gear 31, a third motor 32, a second driving helical gear 33, a lifting screw 34 and a lifting plate 35.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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. 1-4, a flushing device of a tilting pan vacuum filter comprises a base 1, a U-shaped supporting plate 2 is fixedly connected to the upper end of the base 1, the lower end of the horizontal portion of the U-shaped supporting plate 2 and the upper end of the base 1 are rotatably connected with a same reciprocating screw rod 3 through a ball bearing, a screw ring 4 is in threaded connection with the rod wall of the reciprocating screw rod 3, a first driven helical gear 5 is fixedly sleeved on the lower rod wall of the reciprocating screw rod 3, a first motor 6 is fixedly connected to the outer wall of the vertical portion of the U-shaped supporting plate 2, an output shaft of the first motor 6 penetrates through the side wall of the U-shaped supporting plate 2 through a through hole and is fixedly connected with a first driving helical gear 7 engaged with the first driven helical gear 5, two connecting rods 8 penetrating through the horizontal portion of the U-shaped supporting plate 2 through a through hole are symmetrically and fixedly connected to the upper end of the screw ring 4, the upper ends of the two connecting rods 8 are fixedly connected with a same supporting block 9, the side wall of the supporting block 9 is provided with a fixed groove, the fixed groove is connected with a rotating rod 10 through a ball bearing in a rotating way, the rod wall of the rotating rod 10 is fixedly sleeved with a driven gear 11, the upper end of the supporting block 9 is fixedly connected with a second motor 12, the output shaft of the second motor 12 is fixedly connected with a driving gear 13 meshed with the driven gear 11, one end of the rotating rod 10 is fixedly connected with a U-shaped fixing plate 14, the lower end of the U-shaped fixing plate 14 is fixedly connected with a first U-shaped clamping plate 15, the upper end of the U-shaped fixing plate 14 is provided with a through hole, an extension rod 16 is movably sleeved in the through hole, the lower end of the extension rod 16 is fixedly connected with a second U-shaped clamping plate 17 corresponding to the first U-shaped clamping plate 15, the upper end of the U-shaped fixing plate 14 is positioned and clamped with the extension rod 16 through a clamping mechanism, the upper end of the base 1 is also fixedly connected with a water storage tank 19, the side wall of the water storage tank 19 is fixedly connected with a water spraying head 21 through a support 20, the upper end of the water storage tank 19 is also fixedly connected with a water pump 22, the water inlet of the water pump 22 is fixedly communicated with the water storage tank 19 through a water inlet pipe, and the water outlet of the water pump 22 is fixedly communicated with a sprinkler head 21 through a water outlet pipe.
The clamping mechanism comprises a cylindrical groove 23 formed in the inner wall of the through hole, a clamping rod 25 fixedly connected with a thrust spring 24 is arranged at the bottom of the cylindrical groove 23, a clamping groove 26 corresponding to the clamping rod 25 is formed in the rod wall of the extension rod 16, the clamping rod 25 is located at one end of the cylindrical groove 23 and fixedly connected with a pull rod 27, and one end, far away from the clamping rod 25, of the pull rod 27 extends out of the U-shaped fixing plate 14 through the through hole and is fixedly connected with a pull plate 28.
Base 1 is hollow structure and inner wall fixedly connected with locating plate 29, through-hole and through-hole have been seted up in the center department of locating plate 29 and have been rotated through ball bearing and have been cup jointed a screw thread section of thick bamboo 30, the outer wall of screw thread section of thick bamboo 30 is fixed and has been cup jointed the driven helical gear 31 of second, the upper end fixedly connected with third motor 32 of locating plate 29, the output shaft fixedly connected with of third motor 32 and the second initiative helical gear 33 of the driven helical gear 31 meshing of second, screw thread section of thick bamboo 30 female connection has lifting screw 34, the lower extreme fixedly connected with lifter plate 35 of lifting screw 34, the equal fixedly connected with universal wheel 18 in the bottom four corners department of lifter plate 35.
Two first limiting slide blocks are symmetrically and fixedly connected to the side wall of the threaded ring 4, and a first limiting sliding groove matched with the first limiting slide blocks is formed in the vertical portion of the U-shaped supporting plate 2.
The even fixedly connected with a plurality of second limit slide blocks of lateral wall of lifter plate 35, the inner wall of base 1 offer with the spacing spout of second limit slide block assorted second.
The clamping rod 25 is located in the cylindrical groove 23, two third limiting slide blocks are symmetrically and fixedly connected to the rod wall of one end, and a third limiting slide groove matched with the third limiting slide blocks is formed in the inner wall of the cylindrical groove 23.
The upper end of the lifting screw 34 is fixedly connected with a limit plate.
To sum up, when cleaning the filter disc, the flushing device of the tilting-disc vacuum filter firstly clamps the filter disc in the first U-shaped clamping plate 15, then pushes down the extension rod 16, the extension rod 16 pushes the second U-shaped clamping plate 17 down to clamp the upper end of the filter disc, the thrust spring 24 pushes the clamping rod 25 out of the cylindrical groove 23 to clamp the clamping rod 25 with the clamping groove 26, so as to realize the quick connection of the filter disc, and when the filter disc needs to be taken out, the pull plate 28 is pulled, the limit locking of the extension rod 18 can be released by pulling the clamping rod 25 out of the clamping groove 26 by using the pull rod 27, so as to realize the quick disassembly and assembly of the filter disc, the filter disc is convenient to use, the water in the water storage tank 19 is conveyed to the water spray head 21 to be sprayed out by the water pump 22, the first motor 6 is started, the first motor 6 drives the first driving helical gear 7 to rotate, the reciprocating screw rod 3 is driven to rotate by the meshing action of the first driving helical gear 7 and the first driven helical gear 5, then the screw thread ring 4 drives the supporting block 9 to move up and down through the connecting rod 8 by the screw thread connection action of the reciprocating screw rod 3 and the screw thread ring 4, further drives the filter disc to move up and down back and forth, then the second motor 12 is started, the second motor 12 drives the driving gear 13 to rotate, the rotating rod 10 is driven to rotate by the meshing action of the driving gear 13 and the driven gear 11, further drives the filter disc to rotate, the filter disc can be cleaned in all directions, the cleaning efficiency is greatly improved, the labor force is saved, when the device needs to be moved, the third motor 32 is started, the third motor 32 drives the second driving helical gear 33 to rotate, the screw thread cylinder 30 is driven to rotate by the meshing action of the second driving helical gear 33 and the second driven helical gear 31, and the lifting plate 35 pushes the universal wheel 36 out of the base 1 by the screw thread connection action of the screw thread cylinder 30 and the lifting screw rod 34, thereby facilitating the movement of the device, and the third motor 32 is controlled to rotate reversely when the universal wheel 36 does not need to be moved, so that the universal wheel 36 can be retracted into the base 1, and the problem that the mobility of the universal wheel 36 affects the stable placement of the device is avoided.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The utility model provides a flushing device of tilting pan vacuum filter, includes base (1), its characterized in that: the upper end of the base (1) is fixedly connected with a U-shaped supporting plate (2), the lower end of the horizontal part of the U-shaped supporting plate (2) and the upper end of the base (1) are rotatably connected with a same reciprocating screw rod (3) through a ball bearing, the rod wall of the reciprocating screw rod (3) is in threaded connection with a threaded ring (4), a first driven helical gear (5) is fixedly sleeved on the lower rod wall of the reciprocating screw rod (3), the outer wall of the vertical part of the U-shaped supporting plate (2) is fixedly connected with a first motor (6), an output shaft of the first motor (6) penetrates through the side wall of the U-shaped supporting plate (2) through a through hole and is fixedly connected with a first driving helical gear (7) meshed with the first driven helical gear (5), and the upper end of the threaded ring (4) is symmetrically and fixedly connected with two connecting rods (8) penetrating through the horizontal part of the U-shaped supporting plate (2) through the through hole, the upper ends of the two connecting rods (8) are fixedly connected with the same supporting block (9), the side wall of the supporting block (9) is provided with a fixed groove, a rotating rod (10) is rotatably connected in the fixed groove through a ball bearing, the rod wall of the rotating rod (10) is fixedly sleeved with a driven gear (11), the upper end of the supporting block (9) is fixedly connected with a second motor (12), an output shaft of the second motor (12) is fixedly connected with a driving gear (13) meshed with the driven gear (11), one end of the rotating rod (10) is fixedly connected with a U-shaped fixing plate (14), the lower end of the U-shaped fixing plate (14) is fixedly connected with a first U-shaped clamping plate (15), the upper end of the U-shaped fixing plate (14) is provided with a through hole, an extending rod (16) is movably sleeved in the through hole, and the lower end of the extending rod (16) is fixedly connected with a second U-shaped clamping plate (17) corresponding to the first U-shaped clamping plate (15), the upper end of the U-shaped fixing plate (14) is positioned and clamped with an extension rod (16) through a clamping mechanism, the upper end of the base (1) is also fixedly connected with a water storage tank (19), the side wall of the water storage tank (19) is fixedly connected with a water spray head (21) through a support (20), the upper end of the water storage tank (19) is also fixedly connected with a water pump (22), a water inlet of the water pump (22) is fixedly communicated with the water storage tank (19) through a water inlet pipe, and a water outlet of the water pump (22) is fixedly communicated with the water spray head (21) through a water outlet pipe;
the clamping mechanism comprises a cylindrical groove (23) formed in the inner wall of the through hole, the bottom of the cylindrical groove (23) is fixedly connected with a clamping rod (25) through a thrust spring (24), the rod wall of the extension rod (16) is provided with a clamping groove (26) corresponding to the clamping rod (25), one end, located in the cylindrical groove (23), of the clamping rod (25) is fixedly connected with a pull rod (27), and one end, far away from the clamping rod (25), of the pull rod (27) extends out of the U-shaped fixing plate (14) through the through hole and is fixedly connected with a pull plate (28);
the base (1) is of a hollow structure, the inner wall of the base is fixedly connected with a positioning plate (29), a through hole is formed in the center of the positioning plate (29), a threaded cylinder (30) is rotatably sleeved in the through hole through a ball bearing, a second driven helical gear (31) is fixedly sleeved on the outer wall of the threaded cylinder (30), the upper end of the positioning plate (29) is fixedly connected with a third motor (32), an output shaft of the third motor (32) is fixedly connected with a second driving helical gear (33) meshed with the second driven helical gear (31), a lifting screw (34) is connected with the inner thread of the threaded cylinder (30), the lower end of the lifting screw (34) is fixedly connected with a lifting plate (35), and four corners of the bottom of the lifting plate (35) are fixedly connected with universal wheels (18);
the side wall of the threaded ring (4) is symmetrically and fixedly connected with two first limiting sliding blocks, and the vertical part of the U-shaped supporting plate (2) is provided with a first limiting sliding groove matched with the first limiting sliding blocks;
the side wall of the lifting plate (35) is uniformly and fixedly connected with a plurality of second limiting sliding blocks, and the inner wall of the base (1) is provided with second limiting sliding grooves matched with the second limiting sliding blocks;
and two third limiting slide blocks are symmetrically and fixedly connected to the rod wall of one end, located in the cylindrical groove (23), of the clamping rod (25), and third limiting slide grooves matched with the third limiting slide blocks are formed in the inner wall of the cylindrical groove (23).
2. The flushing device of the tilting pan vacuum filter according to claim 1, wherein: the upper end of the lifting screw (34) is fixedly connected with a limiting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910442410.4A CN110075600B (en) | 2019-05-25 | 2019-05-25 | Flushing device of tilting pan vacuum filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910442410.4A CN110075600B (en) | 2019-05-25 | 2019-05-25 | Flushing device of tilting pan vacuum filter |
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| CN110075600A CN110075600A (en) | 2019-08-02 |
| CN110075600B true CN110075600B (en) | 2021-09-24 |
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| CN201910442410.4A Active CN110075600B (en) | 2019-05-25 | 2019-05-25 | Flushing device of tilting pan vacuum filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110944502A (en) * | 2019-11-13 | 2020-03-31 | 惠州市合金电子有限公司 | Television mainboard SMT paster material feeding unit |
| CN112059921A (en) * | 2020-07-16 | 2020-12-11 | 马鞍山久特新材料科技有限公司 | Shot blasting and cleaning device for high-molecular wear-resistant bearing wheel |
| CN112247059B (en) * | 2020-09-24 | 2023-08-01 | 巢湖云海镁业有限公司 | Processing and forming device for magnesium crystallizer |
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| SE0401358L (en) * | 2004-05-26 | 2005-02-22 | Kvaerner Pulping Tech | Method and device for cleaning filters |
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| CN107376515A (en) * | 2017-08-11 | 2017-11-24 | 盐城市净博士机械有限公司 | A kind of air conditioner filter screen cleaning device |
| CN107930254A (en) * | 2017-12-04 | 2018-04-20 | 黄健 | A kind of air-conditioning filter net cleaning device |
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