CN220328163U - Upper sewage discharge single-turbine turbulent flow front-mounted filter - Google Patents
Upper sewage discharge single-turbine turbulent flow front-mounted filter Download PDFInfo
- Publication number
- CN220328163U CN220328163U CN202321543432.8U CN202321543432U CN220328163U CN 220328163 U CN220328163 U CN 220328163U CN 202321543432 U CN202321543432 U CN 202321543432U CN 220328163 U CN220328163 U CN 220328163U
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- Prior art keywords
- ball valve
- blowdown
- filter
- piston
- framework
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- 239000010865 sewage Substances 0.000 title abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 239000010935 stainless steel Substances 0.000 claims abstract description 18
- 238000011010 flushing procedure Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 13
- 238000007790 scraping Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 10
- 229910002027 silica gel Inorganic materials 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 abstract description 9
- 238000001914 filtration Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000011001 backwashing Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 2
- 238000011045 prefiltration Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Taps Or Cocks (AREA)
Abstract
The utility model discloses an upper sewage discharge single-turbine turbulent flow front-mounted filter, and relates to the technical field of filters. Including valve body, ball valve, filter flask, control panel, install automatic blowdown ball valve in the filter, install the manual blowdown ball valve in the filter flask bottom, install blowdown ball valve executor and the ball valve executor that intakes on the filter, two executors and control panel electric connection line, fixed connection between automatic blowdown ball valve and the blowdown ball valve executor, ball valve executor and the ball valve fixed connection that intakes are provided with the blow off pipe between automatic blowdown ball valve and the manual blowdown ball valve, and filter one side is equipped with the blowdown takeover, install the flowmeter on the filter, electric connection between control panel and the flowmeter. The turbine turbulence of the water separator can generate centrifugal force, so that impurities can not adhere to the surfaces of the filter flask and the stainless steel filter screen; the automatic pollution discharge and the manual pollution discharge are integrated, the use is more convenient, the restriction of the use condition is avoided, the water leakage protection function is realized, when the rear end leaks, the water inlet ball valve can be automatically closed, and the loss caused by the water leakage is effectively avoided.
Description
Technical Field
The utility model relates to the technical field of filters, in particular to an upper sewage discharge single-turbine turbulent flow front-mounted filter.
Background
The pre-filter is a first coarse filtering device for the whole house water, and can filter sediment, rust and large particulate matters in tap water. The water meter is usually arranged behind a water inlet pipeline water meter so as to ensure that a large amount of precipitated impurities generated in a pipe network can not cause harm to human bodies and play a positive protection role on concealed pipelines, water taps, electric appliances and the like.
The existing preposed filter is provided with a drain outlet in a micro-lower mode, so that a drain ball valve is easy to close in place, and water leakage is caused; the sticky impurities are stuck on the surfaces of the filter flask and the filter screen, so that the filter flask is inconvenient to clean, and the filter flask is dirty after scraping and washing, so that very bad user experience is brought to users; the design of a single manual or automatic blowdown ball valve can cause limitations to user blowdown. The lower sewage discharging outlet can cause the sewage discharging ball valve to be blocked by impurities, and the water leakage phenomenon is caused by the fact that the lower sewage discharging ball valve is not closed in place.
Disclosure of Invention
The utility model aims to provide an upper sewage discharge single turbine turbulent flow front-end filter for solving the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an upper sewage single turbine vortex front filter, including valve body, water inlet ball valve, the filter flask, the control panel and install the automatic sewage ball valve in the filter flask bottom, install the manual sewage ball valve in the filter flask bottom, install sewage ball valve executor and water inlet ball valve executor on the filter, sewage ball valve executor and automatic sewage ball valve fixed connection, and control its switching, water inlet ball valve executor and water inlet ball valve fixed connection, and control its switching, electric connection between water inlet ball valve executor and the control panel respectively, be provided with the blow off pipe between automatic sewage ball valve and the manual sewage ball valve, filter one side is equipped with the blow off takeover, install the flowmeter on the filter, electric connection between flowmeter and the control panel, filter flask internally mounted has the stainless steel filter screen, the inside inner frame that is provided with of stainless steel filter screen, the inner frame bottom is provided with the piston, installs the diverter in the inner frame, the water distributor is installed at the inner frame top, the diverter bottom is equipped with the internal thread, the external screw thread at piston top and the diverter bottom the internal thread of internal thread phase, all is equipped with between diverter and the inner frame, all is equipped with between diverter and the piston, and the lower part of diverter is equipped with the seal ring on the top seal groove, seal is equipped with the seal.
Preferably, the water knockout drum is symmetrically provided with two buckles, the inner framework is provided with annular buckle grooves matched with the buckles, and a plurality of oblique guide vanes are equidistantly arranged on the side edge of the water knockout drum.
Preferably, the top end of the sewage drain pipe is connected with a fastening piece, the fastening piece is connected with the automatic sewage drain ball valve through threads, a sealing ring is arranged between the fastening piece and the sewage drain pipe, and a sealing ring is also arranged between the automatic sewage drain ball valve and the valve body.
Preferably, a groove is arranged on the outer ring of the piston, and a silica gel pad is arranged in the groove.
Preferably, the piston is provided with two water passing holes, and the lower end of the blow-off pipe is provided with two water passing holes.
Preferably, a back flushing framework is arranged above the inner framework, and sealing gaskets are filled in gaps among the back flushing framework, the switching piece and the valve heads of the filters.
Preferably, a back flushing filter screen is arranged on the periphery of the back flushing framework.
Preferably, an outer framework is further arranged outside the inner framework, and the top of the outer framework is contacted with the water separator.
Preferably, the outer framework is further embedded with a soft scraping and washing component, the soft scraping and washing component is made of a hairbrush or silica gel scraping strip, and the soft scraping and washing component is in interference contact with the outer surface of the stainless steel filter screen and the inner wall of the filter flask.
Preferably, the lower end of the outer framework is provided with a cylindrical surface, the piston is matched with the inside of the cylindrical surface, and the silica gel pad outer ring on the piston is in interference fit with the cylindrical surface.
Compared with the prior art, the utility model has the beneficial effects that:
the upper blowdown single-turbine turbulence pre-filter can generate centrifugal force due to turbine turbulence of the water separator, so that impurities can not adhere to the surfaces of the filter flask and the stainless steel filter screen; the automatic pollution discharge and the manual pollution discharge are integrated, the use is more convenient, the restriction of the use condition is avoided, the water leakage protection function is realized, when the rear end leaks, the water inlet ball valve can be automatically closed, and the loss caused by the water leakage is effectively avoided; and the sewage is discharged from the filter, so that the ball valve cannot be closed in place due to the blockage of impurities.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is a schematic perspective view of a water separator according to the present utility model;
FIG. 3 is a schematic cross-sectional view of the switch, inner frame and piston portion of the present utility model;
FIG. 4 is a schematic cross-sectional view of a switch of the present utility model;
FIG. 5 is a schematic view of the manual blowdown status of the present utility model;
fig. 6 is a schematic view of an automatic sewage disposal state of the present utility model.
In the figure: 1. a blowdown ball valve actuator; 2. a sewage discharge connecting pipe; 3. an automatic sewage discharging ball valve; 4. a valve body; 5. a fastener; 6. a flow meter; 7. back flushing the skeleton; 8. a sealing gasket; 9. a water separator; 901. a buckle; 902. oblique guide vanes; 10. a switching member; 1001. a groove; 11. an inner skeleton; 12. stainless steel filter screen; 13. a back flushing spring; 14. a piston; 15. a filter flask; 16. a silica gel pad; 17. manual blowdown ball valve; 18. a water inlet ball valve actuator; 19. a water inlet ball valve; 20. and a blow-down pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the description of the present utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.
As shown in fig. 1-6, the present utility model provides a technical solution: an upper sewage discharge single turbine turbulence front filter comprises a valve body 4, a water inlet ball valve 19, a filter flask 15, a control panel 21, an automatic sewage discharge ball valve 3 arranged in the filter, a manual sewage discharge ball valve 17 arranged at the bottom of the filter flask 15, a sewage discharge ball valve actuator 1 and a water inlet ball valve actuator 18 arranged on the filter, wherein the sewage discharge ball valve actuator 1 is fixedly connected with the automatic sewage discharge ball valve 3 and controls the opening and the closing of the automatic sewage discharge ball valve 3, the water inlet ball valve actuator 18 is fixedly connected with the water inlet ball valve 19 and controls the opening and the closing of the water inlet ball valve 19, the water inlet ball valve actuator 18 and the sewage discharge ball valve actuator 1 are respectively electrically connected with the control panel 21, a sewage discharge pipe 20 is arranged between the automatic sewage discharge ball valve 3 and the manual sewage discharge ball valve 17, a sewage discharge connecting pipe 2 is arranged on one side of the filter, a flowmeter 6 is arranged on the filter, the flowmeter 6 is electrically connected with the control panel 21, a stainless steel filter screen 12 is arranged in the filter flask 15, an inner framework 11 is arranged in the stainless steel filter screen 12, a piston 14 is arranged at the bottom of the inner framework 11, a switching piece 10 is arranged in the inner framework 11, a water separator 9 is arranged at the top of the inner framework 11, an inner thread is arranged at the bottom of the switching piece 10, an outer thread at the top of the piston 14 is screwed with an inner thread at the bottom of the switching piece 10, sealing rings are arranged between the switching piece 10 and the inner framework 11 and between the inner framework 11 and the piston 14, a back flushing spring 13 on the outer circle of the piston 14 is sleeved at the lower part of the switching piece 10, a groove 1001 is arranged at the top of the switching piece 10, a sealing gasket 8 is arranged in the groove 1001, and the flow meter 6 can count the single use flow of a user and the accumulated use flow, when the water flow of the single use or the water time exceeds a user set value, a control board can control the water inlet ball valve 19 to close a water source after receiving signal when the water leakage of the back end, the water leakage protection function is achieved, and the indirect or direct loss caused by water leakage of a user is effectively reduced. It should be noted that, for the switching piece 10, the external thread on the switching piece 10 is screwed with the internal thread on the piston 14, and the external thread and the internal thread can synchronously move upwards or downwards under the action of the water pressure and the back flushing spring 13, so as to switch between the back flushing and the filtering of the purified water. The top groove 1001 of the switch 10 is used to fit the gasket 8, preventing the gasket 8 from falling during installation. The back flushing spring 13 is arranged between the inner framework 11 and the switching piece 10, and a limit is designed between the inner framework 11 and the piston 14 to protect the back flushing spring 13 from being damaged under the condition of high water pressure and lose the back flushing effect.
As a specific embodiment, two buckles 901 are symmetrically arranged on the water separator 9, an annular buckle groove 1101 matched with the buckles 901 is arranged on the inner skeleton 11, and a plurality of inclined guide vanes 902 are equidistantly arranged on the side edge of the water separator 9. As for the water separator 9, it is known that two buckles 901 on the water separator 9 are buckled on annular buckle grooves of the inner skeleton 11, and the water separator 9 and the inner skeleton 11 can rotate mutually, the buckles 901 function to prevent the water separator 9 from moving up and down under the action of water flow, in addition, when the water flow passes through the inclined guide blades 902, water flow vortex is formed, centrifugal force is generated, and impurities are not adhered to the inner surface of the filter flask 15 and the outer surface of the stainless steel filter screen 12; meanwhile, when the water flow impacts the upper ends of the inclined guide vanes 902, the water separator 9 is driven to rotate anticlockwise, so that the water flow vortex is further increased, and a larger centrifugal force is generated.
As a specific embodiment, the top end of the drain pipe 20 is connected with a fastener 5, the fastener 5 is connected with the automatic drain ball valve 3 through threads, a sealing ring is arranged between the fastener 5 and the drain pipe 20, and a sealing ring is also arranged between the automatic drain ball valve 3 and the valve body 4.
As a specific embodiment, a groove is formed on the outer ring of the piston 14, a silica gel pad 16 is arranged in the groove, two water passing holes 1401 are formed on the piston 14, and two water passing holes 2001 are formed at the lower end of the drain pipe 20.
As a specific example, a back flushing skeleton 7 is arranged above the inner skeleton 11, and a sealing gasket 8 is filled in gaps among the back flushing skeleton 7, the switching piece 10 and the valve head of the filter.
As a specific embodiment, the periphery of the back washing framework 7 is also provided with a back washing filter screen 22.
As a specific embodiment, the outer part of the inner frame 11 is further provided with an outer frame 23, the top of the outer frame 23 contacts with the water separator 9, a soft scraping and washing component is further embedded on the outer frame 23, the soft scraping and washing component is made of a hairbrush or silica gel scraping strip material, and the soft scraping and washing component is in interference contact with the outer surface of the stainless steel filter screen 12 and the inner wall of the filter flask 15.
As a specific embodiment, the lower end of the outer skeleton 23 is provided with a cylindrical surface 2301, the piston 14 is matched inside the cylindrical surface 2301, and the outer ring of the silica gel pad 16 on the piston 14 is in interference fit with the cylindrical surface 2301.
In particular, during filtration, the automatic drain ball valve 3 and the manual drain ball valve 17 are both in a closed state, and the backwash spring 13 is installed between the inner framework 11 and the switching member 10 and is in an uncompressed state during filtration. The water enters from the water inlet end, is filtered by a stainless steel filter screen, enters the inner framework 11, enters the switching piece 10, is counted by the flowmeter 6, and is discharged from the water outlet and filtered by the switching piece 10 and the valve head;
when the automatic sewage is discharged, the sewage ball valve actuator 1 drives the automatic sewage ball valve 3 to open sewage, and the manual sewage ball valve 17 is still in a closed state. When in sewage discharge, water flows through the 2 notches on the piston 14, then flows out through the sewage discharge pipe 20, the sewage discharge ball valve 2 and finally flows out through the sewage discharge connecting pipe 2. When water flow acts on the plane of the piston 14, the piston 14 and the switching piece 10 screwed with the piston 14 are driven to move downwards, the internal back flushing spring 13 is compressed until the large plane on the switching piece 10 is firmly propped against the plane on the inner framework 11, so that a limit is formed, and the back flushing spring 13 is protected to be compressed extremely so as to fail. The water flow direction is changed from the filtering of the stainless steel filter screen 12 to the water flow from the inside of the switching piece 10 to the outside, and the water flows out from the inside of the stainless steel filter screen 12 to the outside, so that the backwashing effect is achieved. The piston 14 and the drain pipe 20 are provided with only two water passing ports, so that the siphon effect is achieved, and the large-particle impurities are conveniently discharged.
When the manual blowdown is carried out, the manual blowdown ball valve 17 is manually opened, the automatic blowdown ball valve 3 is still in a closed state, water flows through 2 notches on the piston 14, then flows out through the blowdown pipe 20, the blowdown ball valve 2 and finally flows out through the blowdown connecting pipe 2. When water flow acts on the plane of the piston 14, the piston 14 and the switching piece 10 screwed with the piston 14 are driven to move downwards, the internal back flushing spring 13 is compressed until the large plane on the switching piece 10 is firmly propped against the plane on the inner framework 11, so that a limit is formed, and the back flushing spring 13 is protected to be compressed extremely so as to fail. The water flow direction is changed from the filtering of the stainless steel filter screen 12 to the water flow from the inside of the switching piece 10 to the outside, and the water flows out from the inside of the stainless steel filter screen 12 to the outside, so that the backwashing effect is achieved. The piston 14 and the drain pipe 20 are provided with only two water passing ports, so that the siphon effect is achieved, and the large-particle impurities are conveniently discharged.
When the automatic blowdown ball valve 3 and the manual blowdown ball valve 17 are closed, the water pressure in the filter flask 15 is consistent, the compressed back flush spring 13 releases the elasticity at the moment, the switching piece 10 and the piston 14 are driven to move upwards together until the plane on the piston 14 is firmly propped against the plane on the inner framework 11, and limit is formed.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a single turbine vortex front filter of upper drainage, including valve body (4), water inlet ball valve (19), filter flask (15), control panel (21) and install automatic blowdown ball valve (3) in the filter, install manual blowdown ball valve (17) in filter flask (15) bottom, install blowdown ball valve executor (1) and water inlet ball valve executor (18) on the filter, blowdown ball valve executor (1) and automatic blowdown ball valve (3) fixed connection, and control its switching, water inlet ball valve executor (18) and water inlet ball valve (19) fixed connection, and control its switching, electric connection between water inlet ball valve executor (18) and blowdown ball valve executor (1) and control panel (21) respectively, be provided with blow off pipe (20) between automatic blowdown ball valve (3) and manual blowdown ball valve (17), filter one side is equipped with blowdown takeover (2), its characterized in that: install flowmeter (6) on the filter, electric connection between flowmeter (6) and control panel (21), filter flask (15) internally mounted has stainless steel filter screen (12), and stainless steel filter screen (12) inside is provided with inner skeleton (11), and inner skeleton (11) bottom is provided with piston (14), installs in inner skeleton (11) and switches piece (10), and shunt (9) are installed at inner skeleton (11) top, switch piece (10) bottom is equipped with the internal thread, and the external screw thread at piston (14) top and the internal screw thread at switch piece (10) bottom are mutually screwed, all are equipped with the sealing washer between switch piece (10) and inner skeleton (11), between inner skeleton (11) and piston (14), and the lower part of switch piece (10) still overlaps and is equipped with back flush spring (13) on piston (14) excircle, and switch piece (10) top is seted up flutedly (1001), and sealed pad (8) are equipped with in recess (1001).
2. An upper blowdown single turbine turbulent front filter according to claim 1, characterized in that: two buckles (901) are symmetrically arranged on the water separator (9), annular buckle grooves (1101) matched with the buckles (901) are formed in the inner framework (11), and a plurality of inclined guide vanes (902) are equidistantly arranged on the side edge of the water separator (9).
3. An upper blowdown single turbine turbulent front filter according to claim 1, characterized in that: the top end of the blow-down pipe (20) is connected with a fastening piece (5), the fastening piece (5) is connected with the automatic blow-down ball valve (3) through threads, a sealing ring is arranged between the fastening piece (5) and the blow-down pipe (20), and a sealing ring is also arranged between the automatic blow-down ball valve (3) and the valve body (4).
4. An upper blowdown single turbine turbulent front filter according to claim 1, characterized in that: a groove is formed in the outer ring of the piston (14), and a silica gel pad (16) is arranged in the groove.
5. An upper blowdown single turbine turbulent front filter according to claim 1, characterized in that: two water passing holes (1401) are formed in the piston (14), and two water passing holes (2001) are formed in the lower end of the blow-down pipe (20).
6. An upper blowdown single turbine turbulent front filter according to claim 1, characterized in that: a back flushing framework (7) is arranged above the inner framework (11), and sealing gaskets (8) are filled in gaps among the back flushing framework (7), the switching piece (10) and the valve heads of the filters.
7. An upper blowdown single turbine turbulent front filter according to claim 6, wherein: the periphery of the back flush framework (7) is also provided with a back flush filter screen (22).
8. An upper blowdown single turbine turbulent front filter according to claim 1, characterized in that: an outer framework (23) is further arranged outside the inner framework (11), and the top of the outer framework (23) is in contact with the water separator (9).
9. An upper blowdown single turbine turbulent front filter according to claim 8, wherein: the outer framework (23) is further embedded with a soft scraping and washing component which is made of a hairbrush or silica gel scraping strip, and the soft scraping and washing component is in interference contact with the outer surface of the stainless steel filter screen (12) and the inner wall of the filter flask (15) at the same time.
10. An upper blowdown single turbine turbulent front filter according to claim 8, wherein: the lower end of the outer framework (23) is provided with a cylindrical surface (2301), the piston (14) is matched with the inside of the cylindrical surface (2301), and the outer ring of the silica gel pad (16) on the piston (14) is in interference fit with the cylindrical surface (2301).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202321543432.8U CN220328163U (en) | 2023-06-15 | 2023-06-15 | Upper sewage discharge single-turbine turbulent flow front-mounted filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202321543432.8U CN220328163U (en) | 2023-06-15 | 2023-06-15 | Upper sewage discharge single-turbine turbulent flow front-mounted filter |
Publications (1)
Publication Number | Publication Date |
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CN220328163U true CN220328163U (en) | 2024-01-12 |
Family
ID=89448870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202321543432.8U Active CN220328163U (en) | 2023-06-15 | 2023-06-15 | Upper sewage discharge single-turbine turbulent flow front-mounted filter |
Country Status (1)
Country | Link |
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CN (1) | CN220328163U (en) |
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2023
- 2023-06-15 CN CN202321543432.8U patent/CN220328163U/en active Active
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