CN113198327A - Fine filtration equipment of industrial enzyme preparation - Google Patents
Fine filtration equipment of industrial enzyme preparation Download PDFInfo
- Publication number
- CN113198327A CN113198327A CN202110467227.7A CN202110467227A CN113198327A CN 113198327 A CN113198327 A CN 113198327A CN 202110467227 A CN202110467227 A CN 202110467227A CN 113198327 A CN113198327 A CN 113198327A
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- Prior art keywords
- plate
- block
- fine filtration
- industrial enzyme
- enzyme preparation
- 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.)
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Links
- 238000001914 filtration Methods 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000003262 industrial enzyme Substances 0.000 title claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 43
- 238000007790 scraping Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 102000004190 Enzymes Human genes 0.000 claims description 13
- 108090000790 Enzymes Proteins 0.000 claims description 13
- 238000010030 laminating Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 229940079919 digestives enzyme preparation Drugs 0.000 claims 4
- 239000007787 solid Substances 0.000 claims 2
- 229940088598 enzyme Drugs 0.000 claims 1
- 240000008042 Zea mays Species 0.000 abstract description 23
- 235000002017 Zea mays subsp mays Nutrition 0.000 abstract description 23
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 abstract description 19
- 235000005822 corn Nutrition 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 12
- 210000002615 epidermis Anatomy 0.000 abstract description 6
- 239000010903 husk Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 210000003491 skin Anatomy 0.000 description 5
- 235000016383 Zea mays subsp huehuetenangensis Nutrition 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 235000009973 maize Nutrition 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 241000309551 Arthraxon hispidus Species 0.000 description 3
- 230000002146 bilateral effect Effects 0.000 description 3
- 235000013305 food Nutrition 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/082—Flat membrane modules comprising a stack of flat membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/02—Elements in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2317/00—Membrane module arrangements within a plant or an apparatus
- B01D2317/06—Use of membrane modules of the same kind
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
The invention discloses a fine filtration device of an industrial enzyme preparation, which structurally comprises support legs, a tank body, an observation window and a motor, wherein the upper ends of the support legs are welded and connected with the outer side of the tank body, the middle part of the tank body is riveted and connected with the outer side of the observation window, the top of the tank body is fixedly embedded and connected with the lower end of the motor, a transmission rod is in clearance fit with the middle part of the upper end of a shell, the transmission rod drives a cleaning device fixed by a fixing sleeve to rotate, a scraping strip attached to the upper side of a filter layer pushes a support block to deflect left and right through a cushion block to improve the attachment with corn, a deflection plate is pushed through a toughness block to lift the corn epidermis to prevent the corn epidermis from being adhered to the upper side of the filter layer, the filtration efficiency of the filter layer is improved, a tension spring pulls a clamp plate to move to the left, a fixing plate deflects by taking an engaging shaft as the center under the jacking of a top support plate in the moving process, the contact layer is cleaned, the corn epidermis is prevented from being adhered to the upper side of the deflection plate, the cleaning speed of the filter device is improved.
Description
Technical Field
The invention belongs to the technical field of high-efficiency industrial enzyme preparation, and particularly relates to fine filtration equipment for an industrial enzyme preparation.
Background
The industrial enzyme is a substance used for a catalytic reaction process, the industrial enzyme can accelerate food fermentation speed and improve food taste when being applied in the field of food industry, in order to reduce the impurity content in the industrial enzyme, the enzyme preparation needs to be subjected to fine filtration in the process of preparing the industrial enzyme, the enzyme content of the prepared industrial enzyme is improved, large-particle substances are filtered through a filter membrane in the prior art, the enzyme preparation mainly adopts crops as raw materials, when an enzyme preparation base taking corn steep liquor as a raw material is prepared, the outer skin of corn has toughness and is flaky at the same time in the process of performing fine filtration on the enzyme preparation, when the skin of the corn is attached to the outer side of the filter membrane, a large amount of filtration area is shielded, the speed of the enzyme preparation is reduced when the residual area is subjected to filtration, and the filtration efficiency of the enzyme preparation is reduced.
Disclosure of Invention
In order to solve the problems that when the enzyme preparation base which takes corn steep liquor as a raw material is manufactured in the technology, the outer skin of corn has toughness and is flaky in the process of fine filtration of an enzyme preparation, when the skin of the corn is attached to the outer side of a filter membrane, a large amount of filter area is shielded, the speed of the enzyme preparation is reduced when the enzyme preparation is filtered in the residual area, and the filtering efficiency of the enzyme preparation is reduced, the invention provides fine filtration equipment of an industrial enzyme preparation.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides an industrial enzyme preparation's essence filtration equipment, its structure includes supporting legs, jar body, observation window, motor, supporting legs upper end and jar external side welded connection, jar body middle part and observation window outside riveting are connected, jar body top and motor lower extreme are connected with the inlaying, jar body includes transfer line, income liquid mouth, filter equipment, shell, discharge port, transfer line and shell upper end middle part clearance fit, income liquid mouth right-hand member and shell left end welded connection, filter equipment middle part and the transfer line outside interference fit, shell lower extreme and discharge port left side welded connection.
As a further improvement of the invention, the filtering device comprises a fixed sleeve, a cleaning device and two filtering layers, wherein the outer side of the fixed sleeve is welded and connected with the middle part of the cleaning device, the upper side of each filtering layer is attached to the lower side of the cleaning device, and the two cleaning devices are symmetrically distributed in the left-right direction by taking the fixed sleeve as the center.
As a further improvement of the cleaning device, the cleaning device comprises a fixed block, an elastic plate, a contact layer and a cleaning plate, wherein the lower side of the fixed block is connected with the upper end of the elastic plate in a riveting mode, the lower end of the elastic plate is connected with the upper side of the contact layer in a riveting mode, the bottom of the cleaning plate is movably clamped with the outer side of the contact layer, and the number of the elastic plates in each cleaning device is five and the elastic plates are distributed linearly.
As a further improvement of the invention, the contact layer comprises a folding cover, a guide hole and a scraping strip, the lower side of the folding cover is adhered to the upper side of the scraping strip, the outer side of the guide hole is connected with the upper end of the scraping strip in a nested manner, the folding cover is in a corrugated shape, and the guide hole and the scraping strip are parallel to each other.
As a further improvement of the invention, the scraping strips comprise supporting blocks, cushion blocks, toughness blocks and deflection plates, wherein the upper sides of the supporting blocks are fixedly connected with the lower sides of the cushion blocks in an embedded mode, the toughness blocks are adhered between the outer sides of the bottoms of the supporting blocks and the lower sides of the deflection plates, the tops of the deflection plates are connected with the lower sides of the supporting blocks in a shaft mode, the number of the deflection plates is two for each scraping strip, the two deflection plates are distributed in a bilateral symmetry mode by taking the lower ends of the supporting blocks as centers, and the deflection plates are arc-shaped and are installed obliquely outwards.
As a further improvement of the invention, the cleaning plate comprises three sliding wheels, tension springs and clamping plates, the middle parts of the sliding wheels are connected with the lower end shaft of the clamping plate, the right ends of the tension springs are connected with the left side of the clamping plate in a welding mode, and the three sliding wheels are distributed in parallel at equal intervals.
As a further improvement of the invention, the clamping plate comprises a fixed plate, a top supporting plate and two connecting shafts, wherein the outer side of the upper end of the fixed plate is fixedly connected with the left end and the right end of the top supporting plate, the left side and the right side of each connecting shaft are fixedly connected with the outer side of the upper end of the fixed plate, and the two fixed plates are symmetrically distributed in the left-right direction by taking the connecting shafts as centers.
As a further improvement of the invention, the fixing plate comprises a fixing cover, an extrusion ball and a joint head, the lower end of the fixing cover is connected with the upper end of the joint head through a shaft, the outer side of the extrusion ball is in clearance fit with the inner side of the fixing cover, the bottom of the joint head is arc-shaped, the inside of the fixing cover is of a hollow structure, and the size of the hollow structure is the same as the diameter of the extrusion ball.
Advantageous effects
Compared with the prior art, the invention has the following beneficial effects:
1. the drive rod drives the fixed cleaning device of fixed cover rotatory, and the laminating pushes away the supporting shoe through the cushion and deflects the laminating that improves with the maize about the strike off strip of filter layer upside, pushes away the deflector through toughness piece and lifts the maize epidermis, prevents that the maize epidermis adhesion from at the filter layer upside, having improved the filtration efficiency of filter layer.
2. The extension spring pulling splint move to the left side, and the fixed plate uses the linking shaft as the center to think the lower extreme and deflect under the shore of top fagging at the in-process that removes, clears up the contact layer, has prevented that maize epidermis adhesion from at the upside of deflector, has improved the cleaning rate to filter equipment.
Drawings
FIG. 1 is a schematic diagram of a fine filtration apparatus for an industrial enzyme preparation according to the present invention.
FIG. 2 is a schematic side view of a half-section structure of a can body according to the present invention.
FIG. 3 is a schematic side view of a filter device according to the present invention.
FIG. 4 is a schematic side view of a half-section structure of a cleaning apparatus according to the present invention.
FIG. 5 is a schematic side view of a contact layer of the present invention.
Fig. 6 is a side view of a half-section structure of a scraping strip according to the present invention.
FIG. 7 is a schematic side view of a cleaning plate according to the present invention.
Fig. 8 is a side view of a splint according to the present invention in a half-section configuration.
Fig. 9 is a side view of a fixing plate according to the present invention.
In the figure: the device comprises a supporting leg-1, a tank body-2, an observation window-3, a motor-4, a transmission rod-21, a liquid inlet-22, a filtering device-23, a shell-24, a discharge port-25, a fixing sleeve-231, a cleaning device-232, a filtering layer-233, a fixing block-32 a, an elastic plate-32 b, a contact layer-32 c, a cleaning plate-32 d, a folding cover-c 1, a guide hole-c 2, a scraping strip-c 3, a supporting block-c 31, a cushion block-c 32, a toughness block-c 33, a deflection plate-c 34, a sliding wheel-d 1, a tension spring-d 2, a clamping plate-d 3, a fixing plate-d 31, a supporting plate-d 32, a connecting shaft-d 33, a fixing cover-r 1, an extrusion ball-r 2 and a joint head-r 3.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
as shown in figures 1 to 6:
the invention provides fine filtration equipment of an industrial enzyme preparation, which structurally comprises a supporting leg 1, a tank body 2, an observation window 3 and a motor 4, wherein the upper end of the supporting leg 1 is connected with the outer side of the tank body 2 in a welding manner, the middle part of the tank body 2 is connected with the outer side of the observation window 3 in a riveting manner, the top of the tank body 2 is fixedly embedded with the lower end of the motor 4, the tank body 2 comprises a transmission rod 21, a liquid inlet 22, a filtering device 23, a shell 24 and a discharge port 25, the transmission rod 21 is in clearance fit with the middle part of the upper end of the shell 24, the right end of the liquid inlet 22 is connected with the left end of the shell 24 in a welding manner, the middle part of the filtering device 23 is in interference fit with the outer side of the transmission rod 21, and the lower end of the shell 24 is connected with the left side of the discharge port 25 in a welding manner.
Wherein, filter equipment 23 is including fixed cover 231, cleaning device 232, filter layer 233, fixed cover 231 outside and cleaning device 232 middle part welded connection, filter layer 233 upside and the laminating of cleaning device 232 downside mutually, cleaning device 232 quantity is two to use fixed cover 231 to be bilateral symmetry distribution as the center, make cleaning device 232 can carry out the clearance of both sides to filter membrane at rotatory in-process, improved the efficiency of clearance.
Wherein, cleaning device 232 includes fixed block 32a, plays board 32b, contact layer 32c, cleaning plate 32d, fixed block 32a downside and play board 32b upper end riveting are connected, play board 32b lower extreme and contact layer 32c upside riveting are connected, cleaning plate 32d bottom and the activity block in contact layer 32c outside, play board 32b is five in every cleaning device 232 quantity to be sharp distribution, make and play board 32b can promote contact layer 32c downwards, improved the contact force degree of contact layer 32c with filtration membrane and improved the effect of clearance.
The contact layer 32c comprises a folding cover c1, a guide hole c2 and a scraping strip c3, the lower side of the folding cover c1 is adhered to the upper side of the scraping strip c3, the outer side of the guide hole c2 is connected with the upper end of the scraping strip c3 in a nested mode, the folding cover c1 is in a corrugated shape, the guide hole c2 is parallel to the scraping strip c3, so that the cleaning plate 32d can slide to the right side through the guide hole c2, and the cleaning capability of the corn husks adhered to the outer side of the cleaning device 232 is improved.
The scraping strip c3 comprises a support block c31, a cushion block c32, a flexible block c33 and a deflection plate c34, the upper side of the support block c31 is fixedly connected with the lower side of a cushion block c32 in an embedded mode, the flexible block c33 is bonded between the outer side of the bottom of the support block c31 and the lower side of a deflection plate c34, the top of the deflection plate c34 is connected with the lower side of a support block c31 in a shaft mode, the number of the deflection plates c34 is two in each scraping strip c3, the two deflection plates are distributed in a left-right symmetrical mode with the lower end of the support block c31 as the center, the deflection plate c34 is in an arc shape and is installed obliquely and outwards, the deflection plate c34 can be tightly attached to the upper side of the filter membrane, and the corn lifting capacity is improved.
The specific use mode and function of the embodiment are as follows:
in the invention, the tank body 2 is fixed through the supporting feet 1, the filtering fluency inside can be checked through the observation window 3 in the fine filtering process, the transmission rod 21 is driven by the motor 4 to rotate in the filtering process, so that the corn husks blocked by the filtering device 23 after the liquid inlet 22 enters can be cleaned by the cleaning device 232 of the filtering device 23, the cleaning device 232 fixed by the fixing sleeve 231 is driven by the transmission rod 21 fixed by the shell 24 to rotate to scrape the corn husks adhered to the upper side of the filtering layer 233 in the cleaning process, so that the industrial enzyme pulp can be discharged from the discharge port 25, the fixed block 32a pushes the elastic plate 32b to make the contact layer 32c downwards tightly attached to the filtering layer 233 in the cleaning process, the folding cover c1 is used for connecting the fixed block 32a and the contact layer 32c to prevent the corn husks from entering, the scraping strip c3 attached to the upper side of the filtering layer 233 pushes the c31 to deflect left and right through the cushion block 32 to improve the attachment of the supporting block and the corn, the tough block c33 pushes the deflection plate c34 to lift the corn husks, the motor 4 stops rotating after the filtration is finished, the cleaning plate 32d moves inwards along the guide hole c2 to clean the outer side of the contact layer 32c, the corn husks are prevented from being adhered to the upper side of the filter layer, and the filtration efficiency of the filter layer is improved.
Example 2:
as shown in fig. 7 to 9:
wherein, clearance board 32d includes movable pulley d1, extension spring d2, splint d3, movable pulley d1 middle part and splint d3 lower extreme hub connection, extension spring d2 right-hand member and splint d3 left side welded connection, movable pulley d1 quantity is three to be equidistance parallel distribution, make splint d3 can be steady remove left, improved the laminating stability to scraping strip c3 surface.
Wherein, splint d3 includes fixed plate d31, top fagging d32, links up axle d33, the fixed plate d31 upper end outside is connected with top fagging d32 both ends are inlayed admittedly about, link up axle d33 both sides and fixed plate d31 upper end outside are inlayed admittedly and are connected, fixed plate d31 quantity is two to use and link up axle d33 to be bilateral symmetry distribution as the center, make fixed plate d31 can deflect with linking axle d33 as the center through the promotion of top fagging d32, improved the dynamics of cleaing away to scraping strip c3 both sides.
Wherein, fixed plate c31 includes fixed cover r1, squeeze ball r2, laminating head r3, fixed cover r1 lower extreme is connected with laminating head r3 upper end hub connection, the inside clearance fit of squeeze ball r2 outside and fixed cover r1, laminating head r3 bottom is the arc, fixed cover r1 is inside to be hollow structure to hollow structure's size is the same with squeeze ball r 2's diameter, makes squeeze ball r2 can be to the pressure of other laminating head r3 formation, has improved laminating head r3 and the laminating degree of deflecting plate c34 upside.
The specific use mode and function of the embodiment are as follows:
in the invention, after the industrial enzyme slurry is filtered, the sliding wheel d1 rolls leftwards under the pulling of the tension spring d2 to drive the clamping plate d3 to move leftwards, the fixed plate d31 deflects with the connecting shaft d33 as the center under the propping of the top supporting plate d32 in the moving process, the contact layer 32c is cleaned, the attaching head r3 is extruded by the extrusion ball r2 sliding in the fixed cover r1 during cleaning, the attaching degree of the attaching head r3 and the upper side of the deflection plate c34 is improved, the corn skin is prevented from being adhered to the upper side of the deflection plate c34, and the cleaning speed of the filter device 23 is improved.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.
Claims (8)
1. The utility model provides an equipment is strained to essence of industry enzyme preparation, its structure includes supporting legs (1), jar body (2), observation window (3), motor (4), supporting legs (1) upper end and jar body (2) outside welded connection, jar body (2) middle part is connected with observation window (3) outside riveting, jar body (2) top is connected its characterized in that with motor (4) lower extreme built in:
the tank body (2) comprises a transmission rod (21), a liquid inlet (22), a filtering device (23), a shell (24) and a discharge port (25), the transmission rod (21) is in clearance fit with the middle of the upper end of the shell (24), the right end of the liquid inlet (22) is in welded connection with the left end of the shell (24), the middle of the filtering device (23) is in interference fit with the outer side of the transmission rod (21), and the lower end of the shell (24) is in welded connection with the left side of the discharge port (25).
2. The fine filtration device of an industrial enzyme preparation according to claim 1, wherein: filter equipment (23) are including fixed cover (231), cleaning device (232), filter layer (233), fixed cover (231) outside and cleaning device (232) middle part welded connection, filter layer (233) upside and cleaning device (232) downside are laminated mutually.
3. A fine filtration device for industrial enzyme preparations according to claim 2, wherein: cleaning device (232) are including fixed block (32a), bullet board (32b), contact layer (32c), cleaning plate (32d), fixed block (32a) downside and bullet board (32b) upper end riveting are connected, bullet board (32b) lower extreme and contact layer (32c) upside riveting are connected, cleaning plate (32d) bottom and contact layer (32c) outside activity block.
4. A fine filtration device for industrial enzyme preparations according to claim 3, wherein: the contact layer (32c) comprises a folding cover (c1), a guide hole (c2) and a scraping strip (c3), the lower side of the folding cover (c1) is adhered to the upper side of the scraping strip (c3), and the outer side of the guide hole (c2) is connected with the upper end of the scraping strip (c3) in a nested manner.
5. A fine filtration device for industrial enzyme preparations according to claim 4, wherein: the scraping strip (c3) comprises a supporting block (c31), a cushion block (c32), a flexible block (c33) and a deflection plate (c34), wherein the upper side of the supporting block (c31) is fixedly embedded and connected with the lower side of the cushion block (c32), the flexible block (c33) is bonded between the outer side of the bottom of the supporting block (c31) and the lower side of the deflection plate (c34), and the top of the deflection plate (c34) is connected with the lower side shaft of the supporting block (c 31).
6. A fine filtration device for industrial enzyme preparations according to claim 3, wherein: clearance board (32d) include movable pulley (d1), extension spring (d2), splint (d3), movable pulley (d1) middle part is connected with splint (d3) lower extreme hub connection, extension spring (d2) right-hand member and splint (d3) left side welded connection.
7. The fine filtration device of industrial enzyme preparation according to claim 6, wherein: the splint (d3) include fixed plate (d31), top fagging (d32), link up axle (d33), both ends are connected with top fagging (d32) about the fixed plate (d31) upper end outside is embedded solid, link up axle (d33) both sides and fixed plate (d31) upper end outside is embedded solid and is connected.
8. The fine filtration device of an industrial enzyme preparation according to claim 7, wherein: the fixed plate (c31) includes fixed cover (r1), extrusion ball (r2), laminating head (r3), fixed cover (r1) lower extreme and laminating head (r3) upper end hub connection, extrusion ball (r2) outside and fixed cover (r1) inboard clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467227.7A CN113198327A (en) | 2021-04-28 | 2021-04-28 | Fine filtration equipment of industrial enzyme preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110467227.7A CN113198327A (en) | 2021-04-28 | 2021-04-28 | Fine filtration equipment of industrial enzyme preparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113198327A true CN113198327A (en) | 2021-08-03 |
Family
ID=77029238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110467227.7A Pending CN113198327A (en) | 2021-04-28 | 2021-04-28 | Fine filtration equipment of industrial enzyme preparation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113198327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353955A (en) * | 2022-08-17 | 2022-11-18 | 李甲 | Protection equipment for ecological environment construction |
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2021
- 2021-04-28 CN CN202110467227.7A patent/CN113198327A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115353955A (en) * | 2022-08-17 | 2022-11-18 | 李甲 | Protection equipment for ecological environment construction |
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Application publication date: 20210803 |