CN219730732U - Water saving device for tunnel air purification system - Google Patents
Water saving device for tunnel air purification system Download PDFInfo
- Publication number
- CN219730732U CN219730732U CN202321287519.3U CN202321287519U CN219730732U CN 219730732 U CN219730732 U CN 219730732U CN 202321287519 U CN202321287519 U CN 202321287519U CN 219730732 U CN219730732 U CN 219730732U
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- Prior art keywords
- water
- tank
- tunnel air
- pump
- purification system
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 258
- 238000004887 air purification Methods 0.000 title claims abstract description 40
- 239000010865 sewage Substances 0.000 claims abstract description 60
- 238000004140 cleaning Methods 0.000 claims abstract description 31
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 51
- 230000001502 supplementing effect Effects 0.000 claims description 36
- 230000001954 sterilising effect Effects 0.000 claims description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 14
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 14
- 229910052791 calcium Inorganic materials 0.000 claims description 14
- 239000011575 calcium Substances 0.000 claims description 14
- 239000000460 chlorine Substances 0.000 claims description 14
- 229910052801 chlorine Inorganic materials 0.000 claims description 14
- 238000004659 sterilization and disinfection Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 238000001556 precipitation Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 238000005406 washing Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011045 prefiltration Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Physical Water Treatments (AREA)
Abstract
The utility model discloses a water-saving device for a tunnel air purification system, which comprises a self-cleaning mechanism, a sewage tank, a sewage pump, a dirty water tank, a dirty water pump, a filter and a clean water tank, wherein the self-cleaning mechanism uses a water source in the clean water tank to clean the tunnel air purification system, the sewage tank is used for containing cleaned sewage, the sewage pump is used for pumping the water source in the sewage tank into the dirty water tank, and the dirty water pump is used for pumping the water source in the dirty water tank to the filter to filter and then discharging the filtered water into the clean water tank. The water-saving device is beneficial to realizing the cyclic utilization of water resources, realizing the discharge of sewage without exceeding standard, saving energy and protecting environment.
Description
Technical Field
The utility model belongs to the technical field of tunnel purification, and particularly relates to a water saving device for a tunnel air purification system.
Background
The pre-filter, the electrostatic filter and the post-filter (if any) of the tunnel air purification system need to be cleaned regularly, the cleaning water source is local municipal water supply or fire water supply, and the sewage generated in the cleaning process mainly contains PM1, PM2.5, PM10 and above particulate matters; the conventional method is to drain the cleaned sewage, which not only causes waste of water resources, but also causes pollution to the environment if the drained sewage exceeds the requirements of national standards or landmarks. If the cleaning of the electrostatic filter device needs a large amount of water in the current tunnel purification in the occasions of ultra-large air volume and the like, if the water is directly discharged, water resources are wasted, and the directly discharged water which is not purified also pollutes the environment. Therefore, aiming at the air purification system for tunnel purification, a water-saving device capable of recycling water resources for many times and causing no pollution to the environment is provided.
Disclosure of Invention
Aiming at the problems, the utility model provides a water-saving device for a tunnel air purification system, which is beneficial to realizing the recycling of water resources and the discharge of sewage without exceeding standards, and is energy-saving and environment-friendly.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a water saving device for a tunnel air purification system, which comprises a self-cleaning mechanism, a sewage tank, a sewage pump, a dirty water tank, a dirty water pump, a filter and a clean water tank, wherein the self-cleaning mechanism uses a water source in the clean water tank to clean the tunnel air purification system, the sewage tank is used for containing cleaned sewage, the sewage pump is used for pumping the water source in the sewage tank into the dirty water tank, and the dirty water pump is used for pumping the water source in the dirty water tank to the filter to filter and then discharging the filtered water into the clean water tank.
Preferably, the water saving device for the tunnel air purification system further comprises a clean water pump and a sludge precipitation tank, wherein the clean water pump is used for pumping a water source in the clean water tank to the filter to flush the filter, the sludge precipitation tank is used for accommodating the flushed water source and precipitating, and the precipitated water source is discharged back to the dirty water tank.
Preferably, the water saving device for the tunnel air purification system further comprises a control cabinet, and the sewage pump, the dirty water pump and the clean water pump are all electrically connected with the control cabinet.
Preferably, the water saving device for the tunnel air purification system further comprises a water supplementing mechanism, wherein the water supplementing mechanism comprises a water supplementing tank and a water supplementing electromagnetic valve, and the water supplementing electromagnetic valve is electrically connected with the control cabinet and is used for supplementing clear water of the water supplementing tank to the clear water tank.
Preferably, the sewage pool, the dirty water tank, the clean water tank and the water supplementing tank are all provided with exhaust pipes.
Preferably, the water saving device for the tunnel air purifying system further comprises a sludge conveying vehicle and a sludge pump, wherein the sludge pump is electrically connected with the control cabinet and is used for pumping the sludge in the sludge settling tank into the sludge conveying vehicle.
Preferably, the water saving device for the tunnel air purification system further comprises a PH detector, a calcium detector and a chlorine detector, wherein the PH detector, the calcium detector and the chlorine detector are used for detecting water quality in the clean water tank and are electrically connected with the control cabinet.
Preferably, the clear water tank is also provided with a drainage electromagnetic valve which is electrically connected with the control cabinet.
Preferably, the water-saving device for the tunnel air purification system further comprises an ultraviolet sterilization device electrically connected with the control cabinet, and the water source filtered by the filter is sterilized by the ultraviolet sterilization device and then discharged into the clean water tank.
Preferably, the filter is an active filter material filter.
Compared with the prior art, the utility model has the beneficial effects that:
the device is through adopting automatically cleaning mechanism, the effluent water sump, the sewage pump, dirty water tank, dirty water pump, filter and clean water tank, realize tunnel air purification system's washing and carry out filtration purification to the sewage after wasing and reuse, the water economy resource, and realize the washing of filter through the clean water pump, arrange the sewage after the washing of filter to the mud settling tank and deposit, the water source after the deposit is back again to dirty water tank and is recycled, avoid the filter to use for a long time and produce the jam, and the device is air-dried through the sludge pump with the sludge pump in the mud settling tank into the mud delivery wagon, the discharge is solid rubbish, the handling of being convenient for can not produce the pollution to the environment, the realization has no super standard sewage discharge, energy saving and environmental protection.
Drawings
Fig. 1 is a schematic view of a water saving device according to the present utility model.
Reference numerals illustrate: 1. a tunnel air purification system; 2. a sewage pool; 3. a sewage pump; 4. a dirty water tank; 5. dirty water pump; 6. a filter; 7. a clean water tank; 8. a clean water pump; 9. a sludge precipitation tank; 10. a sludge conveying vehicle; 11. an ultraviolet sterilization device; 12. a water outlet; 13. a water inlet; 14. and a water supplementing interface.
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 will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
As shown in fig. 1, a water saving device for a tunnel air purification system comprises a self-cleaning mechanism, a sewage tank 2, a sewage pump 3, a dirty water tank 4, a dirty water pump 5, a filter 6 and a clean water tank 7, wherein the self-cleaning mechanism cleans the tunnel air purification system 1 by using a water source in the clean water tank 7, the sewage tank 2 is used for containing cleaned sewage, the sewage pump 3 is used for pumping the water source in the sewage tank 2 into the dirty water tank 4, and the dirty water pump 5 is used for pumping the water source in the dirty water tank 4 to the filter 6 for filtering and then discharging the filtered water into the clean water tank 7.
The device comprises a self-cleaning mechanism, a sewage tank 2, a sewage pump 3, a dirty water tank 4, a dirty water pump 5, a filter 6 and a clean water tank 7, wherein the self-cleaning mechanism is of the prior art and is various in form, but the self-cleaning mechanism generally comprises a nozzle, a pipeline, a valve member, an external water pump and the like. An automatic water washing system as proposed in application publication number CN115451505a includes a water storage part, a cleaning agent storage part, a material conveying system, and a pipe nozzle system connected to an electrostatic dust collection device (equivalent to a tunnel air cleaning system in the present utility model). The water inlet 13 of the self-cleaning mechanism is connected with the clean water tank 7 and is used for taking a water source in the clean water tank 7 as a cleaning water source, for example, the water source in the clean water tank 7 is pumped into the water storage part through a pump, the water outlet 12 of the self-cleaning mechanism is connected with the tunnel air purification system 1, and the tunnel air purification system 1 is cleaned through the self-cleaning mechanism.
In an embodiment, the water saving device for the tunnel air purification system further comprises a clean water pump 8 and a sludge settling tank 9, wherein the clean water pump 8 is used for pumping a water source in the clean water tank 7 to the filter 6, the filter 6 is backwashed in the opposite direction to the filtered water, dust and magazines on the filter are washed away, the sludge settling tank 9 is used for containing backwashed sewage and magazines and settling, and the settled water source is conveyed back to the dirty water tank 4 through the pump. If a clean water pump 8 is adopted, dust and impurities on an active filter membrane of the active filter material filter are washed away in a mode of flowing in the opposite direction to the filtered water flow, and are discharged into a sludge precipitation tank 9.
In one embodiment, the water saving device for the tunnel air purifying system further comprises a control cabinet, and the sewage pump 3, the dirty water pump 5 and the clean water pump 8 are all electrically connected with the control cabinet.
In an embodiment, the water saving device for the tunnel air purification system further comprises a water supplementing mechanism, wherein the water supplementing mechanism comprises a water supplementing tank and a water supplementing electromagnetic valve, and the water supplementing electromagnetic valve is electrically connected with the control cabinet and is used for supplementing clear water of the water supplementing tank to the clear water tank 7. The clean water tank 7 is connected with a water supplementing interface 14 of the water supplementing electromagnetic valve, and when the water supplementing electromagnetic valve is controlled to be opened by the control cabinet, clean water is supplemented to the clean water tank 7 from the water supplementing tank.
In one embodiment, the sewage tank 2, the dirty water tank 4, the clean water tank 7 and the water supplementing tank are all provided with exhaust pipes.
In an embodiment, the water saving device for the tunnel air cleaning system further comprises a sludge transporting vehicle 10 and a sludge pump electrically connected to the control cabinet for pumping the sludge in the sludge settling tank 9 into the sludge transporting vehicle 10. When the sludge pump is started up after receiving the instruction of the control cabinet, the sludge at the bottom of the sludge precipitation tank 9 is pumped into the sludge conveying vehicle 10 which is prepared in advance. The sludge can be continuously precipitated in the sludge conveying vehicle 10 until the sludge is air-dried, and then the sludge cake forming the solid is recycled.
In an embodiment, the water saving device for the tunnel air purification system further comprises a PH detector, a calcium detector and a chlorine detector, wherein the PH detector, the calcium detector and the chlorine detector are used for detecting the water quality in the clean water tank 7 and are electrically connected with the control cabinet. Because the automatic cleaning process uses cleaning solution for enhancing the cleaning effect, the PH value and the calcium chloride value of the water source after multiple treatments are far higher than those of municipal water supply or fire water, and meanwhile, the PH value of the cleaning water cannot be higher for protecting metal products such as a pre-filter, an electrostatic filter and the like of the tunnel air purification system. The PH detector, the calcium detector and the chlorine detector are used for monitoring the PH value, the calcium content and the chlorine content in the water tank, so that the discharge of the out-of-standard sewage is avoided.
In one embodiment, a drainage electromagnetic valve is further arranged on the clean water tank 7 and is electrically connected with the control cabinet. The drainage solenoid valve can be opened before the water source in the clean water tank 7 exceeds standard (for example, when the water quality in the clean water tank 7 exceeds a preset threshold value detected by the PH detector, the calcium detector and the chlorine detector), so that the water source in the clean water tank 7 is discharged, and the pollution to the environment caused by the exceeding standard sewage discharge is avoided.
In one embodiment, the water-saving device for the tunnel air purification system further comprises an ultraviolet sterilization device 11 electrically connected with the control cabinet, and the water source filtered by the filter 6 is sterilized by the ultraviolet sterilization device 11 and then discharged into the clean water tank 7. The ultraviolet sterilization device 11 is used for sterilization, for example, the ultraviolet sterilization device 11 is an ultraviolet sterilization lamp tube, or can be other ultraviolet sterilization devices in the prior art.
In one embodiment, filter 6 is an active filter media filter. Or may be other filter arrangements known in the art.
Working principle:
the sewage pump 3, the dirty water pump 5, the clean water pump 8, the ultraviolet sterilization device 11, the sludge pump, the PH detector, the calcium detector, the chlorine detector, the drainage solenoid valve and the water supplementing valve are all electrically connected with the control cabinet, and control instructions are sent out by the control cabinet, such as controlling the start and stop of the sewage pump 3, the dirty water pump 5, the clean water pump 8, the ultraviolet sterilization device 11, the sludge pump, the drainage solenoid valve and the water supplementing solenoid valve, and realizing the data acquisition of the PH detector, the calcium detector and the chlorine detector. First, the tunnel air cleaning system 1 is cleaned by a self-cleaning mechanism using a water source in the clean water tank 7, sewage after the cleaning of the tunnel air cleaning system 1 flows into the sewage tank 2, and the sewage pump 3 conveys sewage in the sewage tank 2 to the dirty water tank 4. After the dirty water pump 5 receives the instruction of opening the control cabinet, the water source of the dirty water tank 4 is pumped to the filter 6 (for example, an active filter material filter, the filtering capacity is that particles with the size of 4 microns can be filtered, and the efficiency is more than 95%) for filtering. The water source filtered by the active filter material filter is sterilized by the ultraviolet sterilizing device 11 and then is discharged into the clean water tank 7 for the next cleaning, and the water source is recycled, so that the water resource is saved. Other filter materials may be used for the filter 6, such as stepwise filtration, firstly to filter particles of large size, secondly to millimeter in diameter and finally to micron size. The active material filter is a glass filter that contains an active metal oxide and has catalytic properties that when contacted with water flowing through the filter, form small amounts of free radicals on the surface of the filter media particles that will protect the active filter media from bacteria. Meanwhile, the active filter material filter has charges, so that the filtering capacity of the active filter material filter can be improved.
The clean water pump 8 receives the instruction of the control cabinet to pump the water source in the clean water tank 7 to the active filter material filter, dust and impurities on the active filter film of the active filter material filter are washed away in a mode of flowing in the opposite direction to the filtered water flow, and meanwhile, the sewage flows into the sludge precipitation tank 9. The sludge settling tank 9 discharges a part of the sewage after the filtering and settling into the dirty water tank 4 again, for example, the sewage can be automatically discharged into the dirty water tank 4 by a pump or under the self weight. Most of the dust impurities are precipitated at the bottom of the sludge precipitation tank 9 and form sludge with water. When the sludge pump receives the instruction of the control cabinet, the sludge at the bottom of the sludge settling tank 9 is pumped into the sludge transfer truck 10 prepared in advance. The sludge continues to precipitate in the sludge transfer car 10 until it is air-dried, and then the sludge cake formed into solid is recovered.
The PH detector, the calcium detector and the chlorine detector are used for monitoring the PH value, the calcium content and the chlorine content in the water tank, and when the PH value, the calcium content and the chlorine content exceed a preset threshold value, the control cabinet is informed to send out an instruction for opening the drainage electromagnetic valve, and when the drainage duration reaches the preset time, the drainage electromagnetic valve is closed. Then the control cabinet sends out a water supplementing instruction, the water supplementing electromagnetic valve is opened, clear water is supplemented to the clear water tank 7 from the water supplementing tank, when the liquid level of the clear water tank 7 reaches a preset liquid level, the clear water is fed back to the control cabinet, and the control cabinet sends out a closing instruction to the water supplementing electromagnetic valve, so that the water supplementing electromagnetic valve is closed.
The device is through adopting automatically cleaning mechanism, the effluent water sump, the sewage pump, dirty water tank, dirty water pump, filter and clean water tank, realize tunnel air purification system's washing and carry out filtration purification to the sewage after wasing and reuse, the water economy resource, and realize the washing of filter through the clean water pump, arrange the sewage after the washing of filter to the mud settling tank and deposit, the water source after the deposit is back again to dirty water tank and is recycled, avoid the filter to use for a long time and produce the jam, and the device is air-dried through the sludge pump with the sludge pump in the mud settling tank into the mud delivery wagon, the discharge is solid rubbish, the handling of being convenient for can not produce the pollution to the environment, the realization has no super standard sewage discharge, energy saving and environmental protection.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above-described embodiments represent only the more specific and detailed embodiments of the present utility model, but are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A water saving fixtures for tunnel air purification system, characterized in that: the water saving device for the tunnel air purification system comprises a self-cleaning mechanism, a sewage tank (2), a sewage pump (3), a dirty water tank (4), a dirty water pump (5), a filter (6) and a clean water tank (7), wherein the self-cleaning mechanism cleans the tunnel air purification system (1) by using a water source in the clean water tank (7), the sewage tank (2) is used for containing cleaned sewage, the sewage pump (3) is used for pumping the water source in the sewage tank (2) into the dirty water tank (4), and the dirty water pump (5) is used for pumping the water source in the dirty water tank (4) to the filter (6) for filtering and then discharging the filtered water into the clean water tank (7).
2. The water saving device for a tunnel air purifying system according to claim 1, wherein: the water saving device for the tunnel air purification system further comprises a clean water pump (8) and a sludge precipitation tank (9), wherein the clean water pump (8) is used for pumping a water source in the clean water tank (7) to the filter (6) to flush the filter (6), and the sludge precipitation tank (9) is used for accommodating the flushed water source and precipitating, and the precipitated water source is discharged back to the dirty water tank (4).
3. The water saving device for a tunnel air purifying system according to claim 2, wherein: the water saving device for the tunnel air purification system further comprises a control cabinet, and the sewage pump (3), the dirty water pump (5) and the clean water pump (8) are electrically connected with the control cabinet.
4. A water conservation device for a tunnel air purification system as claimed in claim 3 wherein: the water saving device for the tunnel air purification system further comprises a water supplementing mechanism, wherein the water supplementing mechanism comprises a water supplementing tank and a water supplementing electromagnetic valve, and the water supplementing electromagnetic valve is electrically connected with the control cabinet and is used for supplementing clear water of the water supplementing tank to the clear water tank (7).
5. The water saving device for a tunnel air purifying system according to claim 4, wherein: the sewage tank (2), the dirty water tank (4), the clean water tank (7) and the water supplementing tank are all provided with exhaust pipes.
6. A water conservation device for a tunnel air purification system as claimed in claim 3 wherein: the water saving device for the tunnel air purification system further comprises a sludge conveying vehicle (10) and a sludge pump, wherein the sludge pump is electrically connected with the control cabinet and is used for pumping the sludge in the sludge precipitation tank (9) into the sludge conveying vehicle (10).
7. A water conservation device for a tunnel air purification system as claimed in claim 3 wherein: the water saving device for the tunnel air purification system further comprises a PH detector, a calcium detector and a chlorine detector, wherein the PH detector, the calcium detector and the chlorine detector are used for detecting water quality in the clean water tank (7) and are electrically connected with the control cabinet.
8. The water saving device for a tunnel air purifying system according to claim 7, wherein: and a drainage electromagnetic valve is further arranged on the clean water tank (7), and the drainage electromagnetic valve is electrically connected with the control cabinet.
9. A water conservation device for a tunnel air purification system as claimed in claim 3 wherein: the water-saving device for the tunnel air purification system further comprises an ultraviolet sterilization device (11) electrically connected with the control cabinet, and the water source filtered by the filter (6) is discharged into the clean water tank (7) after being sterilized by the ultraviolet sterilization device (11).
10. The water saving device for a tunnel air purifying system according to claim 1, wherein: the filter (6) is an active filter material filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321287519.3U CN219730732U (en) | 2023-05-25 | 2023-05-25 | Water saving device for tunnel air purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321287519.3U CN219730732U (en) | 2023-05-25 | 2023-05-25 | Water saving device for tunnel air purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219730732U true CN219730732U (en) | 2023-09-22 |
Family
ID=88058357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321287519.3U Active CN219730732U (en) | 2023-05-25 | 2023-05-25 | Water saving device for tunnel air purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219730732U (en) |
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2023
- 2023-05-25 CN CN202321287519.3U patent/CN219730732U/en active Active
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