CN114259817A - Adjustable filter with high-efficiency purification function - Google Patents
Adjustable filter with high-efficiency purification function Download PDFInfo
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- CN114259817A CN114259817A CN202111566591.5A CN202111566591A CN114259817A CN 114259817 A CN114259817 A CN 114259817A CN 202111566591 A CN202111566591 A CN 202111566591A CN 114259817 A CN114259817 A CN 114259817A
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- 238000000746 purification Methods 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000010030 laminating Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to an adjustable filter with a high-efficiency purification function, which comprises a frame body, wherein a first filter screen is movably arranged in the frame body, a second filter screen is movably arranged at the bottom of the first filter screen, an adjusting assembly is arranged in the frame body, a cleaning assembly is arranged on the frame body, and a wind speed sensor body is arranged in the frame body and below the adjusting assembly. This filter with adjustable high-efficient purification performance, drive clockwise or anticlockwise rotation of transmission shaft through rotatory runner, make the worm rotate and drive the worm wheel and rotate, make the pivot rotate and drive clockwise or anticlockwise rotation of gear, thereby make the rack move right or left and drive the bottom of the first filter screen of second filter screen laminating and move right or left, thereby the mesh that makes first filter screen and second filter screen is crisscross realizes adjusting the density of dredging of filter screen, so, the operation mode is simple, the person of facilitating the use uses, great improvement the suitability of device.
Description
Technical Field
The invention relates to the technical field of filters, in particular to an adjustable filter with a high-efficiency purification function.
Background
The filter contains air cleaner, and air cleaner indicates air filter equipment, generally is used for clean workshop, clean factory building, laboratory and toilet, perhaps is used for preventing dust of electron mechanical communication equipment etc. has the primary filter, and medium efficiency filter, high and medium efficiency filter and inferior high efficiency and high efficiency filter totally five models, and various models have different standards and performance in service.
According to the board-like coarse filter of area resistance monitoring function that chinese patent CN201920644737.5 provided, can adjust the number of piles and the density of dredging of filter screen in the filter through the coarse filtration net that sets up and thin filter screen, according to the environment of using, select the suitable number of piles and the density of dredging of filter, dismantle the bolt use tool in the screw, the closing cap of taking down, the selective coarse filtration net or the thin filter screen that leaves in the screen groove, the environment that the adaptation was used, be used for filtering great impurity through the coarse filtration net, be used for filtering less impurity through the thin filter screen, the closing cap keeps level person of facilitating the use installation filter with a side of filter frame, when the installation was dismantled coarse filtration net and thin filter screen, along guide way pull deflector.
However, if the density (mesh size) of the filter screen needs to be adjusted when the adjustable filter is used, one of the coarse filter screen and the fine filter screen needs to be detached to adjust different densities (mesh sizes), and the method is complex in operation, inconvenient to adjust quickly and poor in practicability, so that the adjustable filter with the efficient purification function is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an adjustable filter with a high-efficiency purification function, which has the advantages of being convenient for quickly adjusting different density (mesh size) of a filter screen and the like, and solves the problem that the density (mesh size) of the filter screen is inconvenient to quickly adjust by the conventional filter.
In order to achieve the purpose, the invention provides the following technical scheme: an adjustable filter with a high-efficiency purification function comprises a frame body, wherein a first filter screen is movably mounted in the frame body, a second filter screen is movably mounted at the bottom of the first filter screen, an adjusting assembly is arranged in the frame body, a cleaning assembly is arranged on the frame body, and a wind speed sensor body is arranged in the frame body and below the adjusting assembly;
the adjusting part includes that quantity is two transmission shafts, two the transmission shaft rotates respectively and connects the below of connecting in the left and right sides of framework and being located the second filter screen, the below that the inside of framework is located the second filter screen rotates and is connected with the pivot, fixed mounting has the worm between the transmission shaft, the bottom fixed mounting of second filter screen has the rack, the outside fixed mounting of pivot has one end and rack engaged with gear, the outside of pivot and the front side fixed mounting that is located the gear have one end and worm engaged with worm wheel.
Further, the clearance subassembly includes driving motor, driving motor fixed mounting is on the right side of framework, driving motor's output fixed mounting has one end to run through and rotate the screw rod of being connected with the left side of framework inner wall, the inside of framework and the top fixed mounting who is located the screw rod have the gag lever post, the sleeve has been cup jointed to the outside of screw rod, telescopic bottom fixed mounting has the brush board of laminating mutually with first filter screen top, telescopic top fixed mounting has the stop collar that cup joints mutually with the gag lever post outside.
Further, ventilation holes are formed in the top and the bottom of the frame body, and the wind speed sensor body is installed inside the frame body through the fixing plate.
Further, the left and right sides of framework inner wall all sets up with the corresponding first spout of first filter screen, two the equal movable mounting in inside of first spout has first slider, two one side that first slider is relative respectively with the left and right sides fixed connection of first filter screen, first spout and first slider phase-match.
Furthermore, the bottom of first filter screen is seted up quantity and is two spacing grooves, two the equal fixed mounting in inside of spacing groove has the dead lever, two the movable block has all been cup jointed to the outside of dead lever, the spring has been cup jointed to the outside of dead lever and is located two relative one sides of movable block.
Further, the top of second filter screen is seted up quantity and is two the second spout, two the equal movable mounting in inside of second spout has the second slider, and the top of two second sliders respectively with the bottom fixed connection of two movable blocks, second spout and second slider phase-match.
Furthermore, two the one end that the worm was kept away from to the transmission shaft all is connected through the left and right sides rotation of first bearing and framework inner wall, the one end that driving motor was kept away from to the screw rod and the front and the back of pivot all are connected through second bearing and framework inner wall rotation.
Further, the right side transmission of framework is connected with the runner of one end and the right side fixed connection of right side transmission shaft, telescopic inside seted up with screw rod assorted screw thread through-hole.
Further, two one side fixed connection that one side that the spring is relative carried on the back with two spacing inslot walls respectively, one side that the spring is carried on the back mutually respectively with one side fixed connection that two movable blocks are relative, the front of framework seted up respectively with first filter screen, second filter screen and rack assorted jack, the equal fixed mounting in front of first filter screen and second filter screen has the handle.
Compared with the prior art, the technical scheme of the application has the following beneficial effects:
1. this filter with adjustable high-efficient purification performance, drive clockwise or anticlockwise rotation of transmission shaft through rotatory runner, make the worm rotate and drive the worm wheel and rotate, make the pivot rotate and drive clockwise or anticlockwise rotation of gear, thereby make the rack move right or left and drive the bottom of the first filter screen of second filter screen laminating and move right or left, thereby the mesh that makes first filter screen and second filter screen is crisscross realizes adjusting the density of dredging of filter screen, so, the operation mode is simple, the person of facilitating the use uses, great improvement the suitability of device.
2. This filter with adjustable high-efficient purification performance, when needs are maintained first filter screen and second filter screen, the user passes through first slider with first filter screen and slides in first spout inside, thereby can take first filter screen out from the inside of framework, again through sliding the inside with the second slider at the second spout, thereby take off the second filter screen, can maintain first filter screen and second filter screen, the maintenance is accomplished and is connected the back with second filter screen and first filter screen, insert the framework with first filter screen again, make rack and gear engagement, can accomplish the installation and use, so, great reduction the degree of difficulty of maintaining first filter screen and second filter screen, further person of facilitating the use uses.
3. This filter with adjustable high-efficient purification performance, through setting up the air velocity transducer body, can monitor the speed of the gaseous circulation through first filter screen and second filter screen, when gaseous circulation speed is less than the normal value, drive the screw rod through starting driving motor and rotate, make the sleeve rotatory move left, make the outside of stop collar at the gag lever post slide, thereby avoid the sleeve rotatory, the sleeve removes the surface that drives the first filter screen of brush board laminating again and brushes and moves the clearance, thereby avoid impurity to block up, improve the speed of gaseous circulation on the first filter screen, therefore, the clothes hanger is strong in practicability.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is an enlarged view of the invention at B of FIG. 1;
fig. 4 is a front view of the structure of the present invention.
In the figure: the wind speed sensor comprises a frame body 1, a first sliding groove 11, a first sliding block 12, a first filter screen 2, a limiting groove 21, a fixed rod 22, a movable block 23, a spring 24, a second filter screen 3, a second sliding groove 31, a second sliding block 32, an adjusting assembly 4, a transmission shaft 41, a rotating wheel 411, a rotating shaft 42, a worm 43, a rack 44, a gear 45, a worm gear 46, a cleaning assembly 5, a driving motor 51, a screw 52, a limiting rod 53, a sleeve 54, a brush plate 55, a limiting sleeve 56, a wind speed sensor body 6 and a fixing plate 61.
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. 1-4, an adjustable filter with high-efficiency purification function in this embodiment includes a frame 1, a first filter screen 2 is movably installed inside the frame 1, a second filter screen 3 is movably installed at the bottom of the first filter screen 2, an adjusting assembly 4 is disposed inside the frame 1, the adjusting assembly 4 includes two transmission shafts 41, the two transmission shafts 41 are respectively rotatably connected to the left and right sides of the frame 1 and located below the second filter screen 3, a rotating shaft 42 is rotatably connected to the inside of the frame 1 located below the second filter screen 3, a worm 43 is fixedly installed between the transmission shafts 41, a rack 44 is fixedly installed at the bottom of the second filter screen 3, a gear 45 with one end engaged with the rack 44 is fixedly installed outside the rotating shaft 42, and a worm wheel 46 with one end engaged with the worm 43 is fixedly installed outside the rotating shaft 42 and located on the front side of the gear 45.
It is specific, through clockwise or anticlockwise rotation transmission shaft 41, make worm 43 rotate and drive worm wheel 46 and rotate, make pivot 42 rotate and drive gear 45 clockwise or anticlockwise rotation, thereby make rack 44 move right or left and drive the bottom of the first filter screen 2 of second filter screen 3 laminating and move right or left, thereby make the crisscross realization of mesh of first filter screen 2 and second filter screen 3 adjust the density mesh size of filter screen, so, the operation mode is simple, and the convenience of customers uses, great improvement the suitability of device.
Referring to fig. 1, in this embodiment, a cleaning assembly 5 is disposed on a frame 1, the cleaning assembly 5 includes a driving motor 51, the driving motor 51 is fixedly mounted on the right side of the frame 1, a screw 52 having one end penetrating through and rotatably connected to the left side of the inner wall of the frame 1 is fixedly mounted at an output end of the driving motor 51, a limiting rod 53 is fixedly mounted inside the frame 1 and above the screw 52, a sleeve 54 is sleeved outside the screw 52, a brush plate 55 attached to the top of the first filter screen 2 is fixedly mounted at the bottom of the sleeve 54, a limiting sleeve 56 sleeved outside the limiting rod 53 is fixedly mounted at the top of the sleeve 54, an air velocity sensor body 6 is disposed inside the frame 1 and below the adjusting assembly 4, the air velocity sensor can continuously monitor the air velocity and the air volume (air volume ═ cross-sectional area of air velocity x) at the above-mentioned place, and can display the air volume of the roadway at the place in real time, the sensor component of the instrument is composed of a wind speed sensor, a wind direction sensor and a sensor bracket.
Specifically, through setting up wind speed sensor body 6, can monitor the speed of the circulation of the gas through first filter screen 2 and second filter screen 3, when gaseous circulation speed is less than the normal value, drive screw rod 52 through start-up driving motor 51 and rotate, make the rotatory leftward movement of sleeve 54, make stop collar 56 slide in the outside of gag lever post 53, thereby avoid sleeve 54 rotatory, sleeve 54 removes the surface that drives brush board 55 laminating first filter screen 2 again and brushes and moves the clearance, thereby avoid impurity to block up, improve the speed of gaseous circulation on first filter screen 2.
In this embodiment, the ventilation hole has all been seted up to the top and the bottom of framework 1, the circulation of gas of being convenient for, and the stability of the installation of wind speed sensor body 6 is improved in the inside at framework 1 through fixed plate 61 to wind speed sensor body 6.
Referring to fig. 2, wherein, the first spout 11 corresponding to first filter screen 2 is all seted up to the left and right sides of framework 1 inner wall, the equal movable mounting in inside of two first spouts 11 has first slider 12, one side that two first sliders 12 are relative respectively with the left and right sides fixed connection of first filter screen 2, first spout 11 and first slider 12 phase-match, quantity is two second spout 31 is seted up at the top of second filter screen 3, the equal movable mounting in inside of two second spouts 31 has second slider 32, and the top of two second sliders 32 respectively with the bottom fixed connection of two movable blocks 23, second spout 31 and second slider 32 phase-match.
Specifically, when needs are maintained first filter screen 2 and second filter screen 3, the user slides first filter screen 2 in first spout 11 inside through first slider 12, thereby can take first filter screen 2 out from framework 1's inside, again through sliding second slider 32 in the inside of second spout 31, thereby take off second filter screen 3, can maintain first filter screen 2 and second filter screen 3, the maintenance is accomplished and is connected the back with second filter screen 3 and first filter screen 2, insert framework 1 with first filter screen 2 again, make rack 44 and gear 45 mesh, can accomplish the installation and use, so, great reduction the degree of difficulty of maintaining first filter screen 2 and second filter screen 3, further person of facilitating the use uses.
Referring to fig. 2, the bottom of the first filter screen 2 is provided with two limiting grooves 21, fixing rods 22 are fixedly mounted inside the two limiting grooves 21, movable blocks 23 are sleeved outside the two fixing rods 22, and springs 24 are sleeved outside the fixing rods 22 and on the opposite sides of the two movable blocks 23.
Specifically, drive movable block 23 when second filter screen 3 removes and slide in the outside of dead lever 22 to carry on spacingly to the displacement range of second filter screen 3, make second filter screen 3 inseparable with the bottom laminating of first filter screen 2, drive the extension of spring 24 or shrink when movable block 23 removes again, receive the influence that spring 24 self restored power, thereby improve the stability that second filter screen 3 removed.
In this embodiment, the ends of the two transmission shafts 41 far away from the worm 43 are rotatably connected with the left side and the right side of the inner wall of the frame 1 through the first bearings, and the ends of the screw rods 52 far away from the driving motor 51 and the front surface and the back surface of the rotating shaft 42 are rotatably connected with the inner wall of the frame 1 through the second bearings, so that the linkage of the structural operation is improved.
In this embodiment, the right side of the frame 1 is connected with a rotating wheel 411 having one end fixedly connected with the right side of the right side transmission shaft 41, so that the user can rotate the transmission shaft 41, and the sleeve 54 is provided with a threaded through hole matched with the screw 52.
In this embodiment, one side that two springs 24 are relative respectively with one side fixed connection that two spacing grooves 21 inner walls carried on the back mutually, one side that springs 24 carried on the back mutually respectively with two movable block 23 relative one side fixed connection, framework 1's front seted up respectively with first filter screen 2, second filter screen 3 and rack 44 assorted jack, the equal fixed mounting in front of first filter screen 2 and second filter screen 3 has the handle, convenient to use person takes first filter screen 2 and second filter screen 3 out or installs.
The electrical components presented in the present invention are electrically connected to a controller and a power supply, the control mode of the present invention is controlled by the controller, the control circuit of the controller can be realized by simple programming by those skilled in the art, the supply of the power supply is also common knowledge in the art, and the present invention is mainly used for protecting mechanical devices, so the control mode and the circuit connection are not explained in detail in the present invention.
The working principle of the above embodiment is as follows:
(1) when the filter screen is used, the rotating wheel 411 is rotated to drive the transmission shaft 41 to rotate clockwise or anticlockwise, the worm 43 is rotated to drive the worm gear 46 to rotate, the rotating shaft 42 is rotated to drive the gear 45 to rotate clockwise or anticlockwise, so that the rack 44 moves rightwards or leftwards to drive the second filter screen 3 to be attached to the bottom of the first filter screen 2 to move rightwards or leftwards, and the meshes of the first filter screen 2 and the second filter screen 3 are staggered, so that the density and mesh size of the filter screens are adjusted;
(2) in addition, when needing to maintain first filter screen 2 and second filter screen 3, the user slides first filter screen 2 in first spout 11 through first slider 12, thereby can take first filter screen 2 out from the inside of framework 1, again through sliding second slider 32 in the inside of second spout 31, thereby take off second filter screen 3, can maintain first filter screen 2 and second filter screen 3, after having maintained and being connected second filter screen 3 with first filter screen 2, insert framework 1 with first filter screen 2 again, make rack 44 and gear 45 mesh, can accomplish the installation and use.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 (9)
1. The utility model provides a filter with adjustable high-efficient purification performance, includes framework (1), its characterized in that: a first filter screen (2) is movably mounted inside the frame body (1), a second filter screen (3) is movably mounted at the bottom of the first filter screen (2), an adjusting component (4) is arranged inside the frame body (1), a cleaning component (5) is arranged on the frame body (1), and a wind speed sensor body (6) is arranged inside the frame body (1) and below the adjusting component (4);
adjusting part (4) are transmission shaft (41) two, two including quantity transmission shaft (41) rotate respectively and connect the below of connecting in the left and right sides of framework (1) and being located second filter screen (3), the below that the inside of framework (1) is located second filter screen (3) is rotated and is connected with pivot (42), fixed mounting has worm (43) between transmission shaft (41), the bottom fixed mounting of second filter screen (3) has rack (44), the outside fixed mounting of pivot (42) has gear (45) of one end and rack (44) engaged with, the outside of pivot (42) just is located the front side fixed mounting of gear (45) and has worm wheel (46) of one end and worm (43) engaged with.
2. The adjustable filter with high-efficiency purification function according to claim 1, wherein: clearance subassembly (5) include driving motor (51), driving motor (51) fixed mounting is on the right side of framework (1), the output fixed mounting of driving motor (51) has one end to run through and rotates screw rod (52) of being connected with the left side of framework (1) inner wall, the inside of framework (1) and the top fixed mounting who is located screw rod (52) have gag lever post (53), sleeve (54) have been cup jointed to the outside of screw rod (52), the bottom fixed mounting of sleeve (54) has brush board (55) of laminating mutually with first filter screen (2) top, the top fixed mounting of sleeve (54) has stop collar (56) that cup joints mutually with gag lever post (53) outside.
3. The adjustable filter with high-efficiency purification function according to claim 1, wherein: the ventilation holes are formed in the top and the bottom of the frame body (1), and the wind speed sensor body (6) is installed inside the frame body (1) through a fixing plate (61).
4. The adjustable filter with high-efficiency purification function according to claim 1, wherein: first spout (11) corresponding with first filter screen (2), two are all seted up to the left and right sides of framework (1) inner wall the equal movable mounting in inside of first spout (11) has first slider (12), two one side that first slider (12) is relative respectively with the left and right sides fixed connection of first filter screen (2), first spout (11) and first slider (12) phase-match.
5. The adjustable filter with high-efficiency purification function according to claim 1, wherein: spacing groove (21) that quantity is two, two are seted up to the bottom of first filter screen (2) the equal fixed mounting in inside of spacing groove (21) has dead lever (22), two movable block (23) have all been cup jointed to the outside of dead lever (22), spring (24) have been cup jointed to the outside of dead lever (22) and be located two relative one sides of movable block (23).
6. The adjustable filter with high-efficiency purification function according to claim 1, wherein: the top of second filter screen (3) is seted up quantity and is second spout (31) two, two the equal movable mounting in inside of second spout (31) has second slider (32), and the top of two second sliders (32) respectively with the bottom fixed connection of two movable blocks (23), second spout (31) and second slider (32) phase-match.
7. The adjustable filter with high-efficiency purification function as claimed in claim 2, wherein: two the one end that worm (43) were kept away from in transmission shaft (41) all is connected through the left and right sides rotation of first bearing and framework (1) inner wall, the one end that driving motor (51) were kept away from in screw rod (52) and the front and the back of pivot (42) all are connected through second bearing and framework (1) inner wall rotation.
8. The adjustable filter with high-efficiency purification function as claimed in claim 2, wherein: the right side transmission of framework (1) is connected with runner (411) of one end and the right side fixed connection of right side transmission shaft (41), the inside of sleeve (54) is seted up with screw rod (52) assorted screw thread through-hole.
9. The adjustable filter with high-efficiency purification function according to claim 5, wherein: two one side fixed connection that spring (24) is relative back to the body with two spacing groove (21) inner wall respectively, one side that spring (24) is back to the body respectively with two movable block (23) relative one side fixed connection, the front of framework (1) is seted up respectively with first filter screen (2), second filter screen (3) and rack (44) assorted jack, the equal fixed mounting in front of first filter screen (2) and second filter screen (3) has the handle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111566591.5A CN114259817A (en) | 2021-12-20 | 2021-12-20 | Adjustable filter with high-efficiency purification function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111566591.5A CN114259817A (en) | 2021-12-20 | 2021-12-20 | Adjustable filter with high-efficiency purification function |
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| CN202111566591.5A Pending CN114259817A (en) | 2021-12-20 | 2021-12-20 | Adjustable filter with high-efficiency purification function |
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| CN212143387U (en) * | 2020-04-07 | 2020-12-15 | 甘肃前进生物科技发展有限公司 | Granule vibration screening plant of fertilizer production |
| CN212396267U (en) * | 2020-05-22 | 2021-01-26 | 广东三辉置业有限公司 | Waste gas recovery device for household garbage incinerator |
| CN212941762U (en) * | 2020-07-02 | 2021-04-13 | 沈阳药科大学 | A waste liquid treatment device for pharmaceutical production |
| CN213079043U (en) * | 2020-08-18 | 2021-04-30 | 时珍堂巴东药业有限公司 | Herbal pieces-sieve separator of adjustable screening size |
| CN215029599U (en) * | 2020-11-19 | 2021-12-07 | 湖北清大中药饮片有限公司 | Chinese-medicinal material reducing mechanism for agricultural production |
| CN213995227U (en) * | 2020-11-27 | 2021-08-20 | 潍坊煜达电声科技有限公司 | Dust screen for die-cutting machine |
| CN215216594U (en) * | 2020-12-29 | 2021-12-17 | 长沙华勇空调设备有限公司 | Combined air conditioning unit |
| CN214619973U (en) * | 2021-04-20 | 2021-11-05 | 江苏慧丰源环境工程技术有限公司 | Double-layer primary-effect filter screen with variable aperture |
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