CN217555874U - Laboratory waste liquid treatment device - Google Patents
Laboratory waste liquid treatment device Download PDFInfo
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- CN217555874U CN217555874U CN202220518669.XU CN202220518669U CN217555874U CN 217555874 U CN217555874 U CN 217555874U CN 202220518669 U CN202220518669 U CN 202220518669U CN 217555874 U CN217555874 U CN 217555874U
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Abstract
The utility model provides a laboratory waste liquid treatment device, including organic waste liquid collecting vat, a plurality of acid-base waste liquid collecting vats, the dilution pipe, a plurality of dilution tank, the neutralization pond, fluid-discharge tube and waste liquid bucket, the dilution pipe is provided with first control switch, the dilution pipe intercommunication has first branch pipe and second branch pipe, first branch pipe is provided with a plurality of first shower, the exit end of a plurality of first shower inserts respectively in organic waste liquid collecting vat and a plurality of acid-base waste liquid collecting vat, each first shower is provided with second control switch, the second branch pipe is provided with a plurality of second shower, the exit end of a plurality of second shower inserts respectively in a plurality of dilution tanks, a plurality of dilution tanks are linked together with the neutralization pond respectively, the fluid-discharge tube is linked together with the neutralization pond, an acid-base waste liquid collecting vat is linked together with a dilution tank, organic waste liquid collecting vat is linked together with the waste liquid bucket. This laboratory waste liquid treatment device can dilute, neutralization treatment and categorised the recovery to the waste liquid, improves waste liquid treatment's security and convenience.
Description
Technical Field
The utility model belongs to the technical field of the supporting facility technique of chemistry experiment and specifically relates to a laboratory waste liquid treatment device is related to.
Background
The experiment of doing in the chemistry experiment room can produce the waste liquid usually, and if these waste liquids were directly discharged into sewer pipe, not only can cause environmental pollution, also can cause very big harm to operating personnel health, consequently collect very important to the waste liquid after the experiment, all adopt big glass bottle or plastic drum to concentrate under the chemistry experiment room general condition and hold, but these harmful waste liquids are placed and have potential danger in the laboratory, so need a device of collection processing chemistry experiment room waste liquid.
The utility model provides a current categorised recovery processing device of chemistry chemical industry waste liquid, the acid waste liquid, alkaline waste liquid, heavy metal waste liquid and the categorised recovery processing device of organic waste liquid design that produce the chemistry chemical process, adopt the collecting vat, storage tank, treatment trough, accumulator and raffinate groove that the multiunit is through taking the valve pipe connection to cooperation heating device, pH monitoring electrode and electronic level gauge pass through instrument controlling means real time monitoring recovery processing process. However, the waste liquid concentration after current categorised recovery processing device retrieves is higher, and when high concentration waste liquid was collected to professional operating personnel and was handled, the transportation and empty the process and all exist and spatter the risk outward, cause the potential safety hazard to operating personnel. If high concentration waste liquid directly discharges to in the waste liquid pipeline, can cause waste liquid pipeline life-span to shorten, increase safe risk and change expense.
Disclosure of Invention
In order to realize the utility model discloses a main objective, the utility model provides a can dilute, neutralization treatment and categorised laboratory waste liquid treatment device who retrieves waste liquid, improved waste liquid treatment's security and convenience.
In order to realize the utility model discloses a main objective, the utility model provides a laboratory waste liquid treatment device, including organic waste liquid collecting vat, a plurality of acid-base waste liquid collecting vats, the diluent pipe, a plurality of dilution tank, neutralization pond, fluid-discharge tube and waste liquid bucket, the first end of diluent pipe is provided with first control switch, the second end intercommunication of diluent pipe has first branch pipe and second branch pipe, first branch pipe intercommunication is provided with a plurality of first shower, the exit end of a plurality of first shower inserts respectively in organic waste liquid collecting vat and a plurality of acid-base waste liquid collecting vat, and each first shower is provided with second control switch, second branch pipe intercommunication is provided with a plurality of second shower, the exit end of a plurality of second shower inserts respectively in a plurality of dilution tank, a plurality of dilution tank are linked together with neutralization pond respectively, and the fluid-discharge tube is linked together with neutralization pond, an acid-base waste liquid collecting vat is linked together with a diluent tank, and organic waste liquid collecting vat is linked together with the waste bucket.
It can be seen from above-mentioned scheme that, pour organic waste liquid into in the organic waste liquid collecting vat, pour acid waste liquid/alkaline waste liquid into corresponding acid-base waste liquid collecting vat respectively, control first control switch and open the dilution pipe, control second control switch opens first shower, make the dilution water in the dilution pipe flow into in organic waste liquid collecting vat and a plurality of acid-base waste liquid collecting vat respectively through the exit end of a plurality of first shower, dilute the waste liquid in organic waste liquid collecting vat and a plurality of acid-base waste liquid collecting vat, the preliminary dilution waste liquid in an acid-base waste liquid collecting vat flows into a dilution tank, simultaneously the dilution water in the dilution pipe flows into a plurality of dilution tanks respectively through the exit end of a plurality of second shower, further dilute the preliminary dilution waste liquid that flows into in the dilution tank again, the secondary dilution waste liquid in a plurality of dilution tanks flows into the neutralization pond respectively and carries out the neutralization treatment, the dilution waste liquid after the neutralization treatment passes through the fluid-discharge pipe and outwards discharges, the dilution waste liquid in the organic waste liquid collecting vat directly flows into the waste liquid barrel and collects, thereby can dilute the waste liquid, the neutralization treatment and the classification recovery of the acid-base waste liquid reaches the concentration of the following dilution pipe, the problem of the transportation safety of the high-base waste liquid discharge pipe is solved, the convenience of the transportation process of the high-base waste liquid discharge risk problem that the transportation of the high-base waste liquid discharge risk of the transport process that can be prolonged, and the high-base waste liquid discharge risk problem that the safety of the high-base waste liquid discharge risk of the transportation process.
The further proposal is that the bottom surface of each dilution tank is arranged downwards obliquely relative to the horizontal direction, and the lowest position of the bottom surface of each dilution tank in the horizontal direction is provided with a first drainage hole communicated with the neutralization tank; and/or a first anti-overflow hole is formed in the side surface of each dilution tank, and the first anti-overflow holes are arranged close to the top end of each dilution tank in the vertical direction and communicated with the neutralization tank.
The bottom surface of the neutralization pond is arranged downwards obliquely relative to the horizontal direction, and the lowest position of the bottom surface of the neutralization pond in the horizontal direction is provided with a second liquid discharge hole communicated with a liquid discharge pipe; and/or a second anti-overflow hole is formed in the side surface of the neutralization pond, is close to the top end of the neutralization pond in the vertical direction and is communicated with the liquid discharge pipe.
The organic waste liquid collecting tank is communicated with the waste liquid barrel through a first liquid guide pipe; and/or the waste liquid barrel is vertically positioned below the organic waste liquid collecting tank; and/or the bottom surface of the organic waste liquid collecting tank is arranged in an inverted round table shape.
The acid-base waste liquid collecting tank is communicated with a diluting tank through a second liquid guiding pipe, and the outlet end of the second liquid guiding pipe is inserted into the diluting tank; and/or the dilution tank is vertically positioned below the acid-base waste liquid collecting tank; and/or the bottom surface of each acid-base waste liquid collecting tank is arranged in an inverted circular truncated cone shape.
The further proposal is that a liquid level sensor is arranged in the neutralization tank.
The laboratory waste liquid treatment device further comprises a cabinet body, wherein exhaust holes are formed in the top end face of the cabinet body in the vertical direction and communicated with an exhaust system, and the organic waste liquid collecting tank, the acid-base waste liquid collecting tanks, the dilution tanks, the neutralization tank and the waste liquid barrel are located inside the cabinet body.
The top end surface of the organic waste liquid collecting tank in the vertical direction is provided with a first air outlet; and/or a second air outlet is formed in the top end face of each acid-base waste liquid collecting tank in the vertical direction.
The organic waste liquid collecting device is characterized in that a first door plate is arranged at the side opening of the organic waste liquid collecting tank, and the first door plate is hinged with the organic waste liquid collecting tank and can open and close the side opening of the organic waste liquid collecting tank; and/or a second door plate is arranged at the side opening of each acid-base waste liquid collecting tank, and the second door plate is hinged with the acid-base waste liquid collecting tank and can open and close the side opening of the acid-base waste liquid collecting tank.
The organic waste liquid collecting device is characterized in that a first spill plate is arranged at the side opening of the organic waste liquid collecting tank and connected with the bottom surface of the organic waste liquid collecting tank; and/or a second anti-overflow plate is arranged at the side opening of each acid-base waste liquid collecting groove and is connected with the bottom surface of the acid-base waste liquid collecting groove.
Drawings
FIG. 1 is a partial structure view of an embodiment of the laboratory waste liquid treatment apparatus of the present invention.
Fig. 2 is a front view of an embodiment of the laboratory waste liquid treatment device of the present invention.
Fig. 3 is a plan view of an embodiment of the laboratory waste liquid treatment apparatus of the present invention.
Fig. 4 is a side view of an embodiment of the laboratory waste liquid treatment apparatus of the present invention.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
Referring to fig. 1 to 4, the embodiment discloses a laboratory waste liquid treatment device 1, including organic waste liquid collecting vat 18, a plurality of acid-base waste liquid collecting vats 17, dilution pipe 12, a plurality of dilution tanks 2, neutralization pond 26, fluid-discharge pipe 27 and waste liquid bucket 23, the first end of dilution pipe 12 is provided with first control switch 24, the second end intercommunication of dilution pipe 12 has first branch pipe 15 and second branch pipe 13, first branch pipe 15 intercommunication is provided with a plurality of first shower pipes 16, the exit end of a plurality of first shower pipes 16 inserts respectively in organic waste liquid collecting vat 18 and a plurality of acid-base waste liquid collecting vats 17, and each first shower pipe 16 is provided with second control switch 19. The second branch pipe 13 is provided with a plurality of second spray pipes 14 in a communicating manner, outlet ends of the plurality of second spray pipes 14 are respectively inserted into the plurality of dilution tanks 2, the plurality of dilution tanks 2 are respectively communicated with the neutralization pond 26, and the liquid discharge pipe 27 is communicated with the neutralization pond 26. An acid-base waste liquid collecting tank 17 is communicated with a diluting tank 2, and an organic waste liquid collecting tank 18 is communicated with a waste liquid barrel 23.
Pouring organic waste liquid into an organic waste liquid collecting tank 18, pouring acidic waste liquid/alkaline waste liquid into corresponding acid-base waste liquid collecting tanks 17 respectively, controlling a first control switch 24 to open a dilution pipe 12, controlling a second control switch 19 to open a first spray pipe 16, enabling dilution water in the dilution pipe 12 to flow into the organic waste liquid collecting tank 18 and the acid-base waste liquid collecting tanks 17 respectively through outlet ends of the first spray pipes 16, diluting waste liquid in the organic waste liquid collecting tank 18 and the acid-base waste liquid collecting tanks 17, enabling primary dilution waste liquid in one acid-base waste liquid collecting tank 17 to flow into one dilution tank 2, and enabling dilution water in the dilution pipe 12 to flow into the dilution tanks 2 respectively through outlet ends of the second spray pipes 14, the preliminary dilution waste liquid that flows into in the dilution tank 2 further dilutes again, the secondary dilution waste liquid in a plurality of dilution tanks 2 flows in respectively and carries out neutralization treatment in the pond 26, the dilution waste liquid after neutralization treatment passes through fluid-discharge tube 27 and outwards discharges, the dilution waste liquid in the organic waste liquid collecting vat 18 directly flows in waste liquid bucket 23 simultaneously and collects, thereby can dilute the waste liquid, neutralization treatment and categorised the recovery, make the acid-base waste liquid of fluid-discharge tube 27 discharge can dilute to the concentration below 1%, reach the low concentration waste liquid and discharge the requirement, the problem of the easy personnel's safety risk hidden danger that causes of current high concentration waste liquid transportation and empting the in-process has been solved, the security and the convenience of liquid water disposal have been improved, and the life of extension fluid-discharge tube 27.
The organic waste liquid collecting tank 18 and the acid-base waste liquid collecting tanks 17 are arranged side by side in the horizontal direction in the embodiment, the organic waste liquid collecting tank 18 is used for collecting organic waste liquid, and the acid waste liquid and the alkaline waste liquid can be collected by corresponding to the acid-base waste liquid collecting tanks 17 one by one. The number of the acid-base waste liquid collecting grooves 17 is three, one acid-base waste liquid collecting groove 17 is used for collecting acid waste liquid, one acid-base waste liquid collecting groove 17 is used for collecting alkaline waste liquid, and one acid-base waste liquid collecting groove 17 is used for collecting sulfuric acid (H) 2 SO 4 ) And (4) waste liquor.
In order to make the waste liquid in the dilution tank 2 smoothly flow into the neutralization tank 26, in this embodiment, the tank bottom surface 212 of each dilution tank 2 is disposed to be inclined downward relative to the horizontal direction, and the first drainage hole 210 communicated with the neutralization tank 26 is disposed at the lowest position of the tank bottom surface 212 of each dilution tank 2 in the horizontal direction, so that the waste liquid in the dilution tank 2 can be completely drained, and the phenomenon of liquid loading in the dilution tank 2 is avoided. Meanwhile, in order to make the waste liquid in the neutralization tank 26 smoothly flow into the liquid discharge pipe 27, in the embodiment, the tank bottom surface 261 of the neutralization tank 26 is arranged obliquely downward relative to the horizontal direction, and the second liquid discharge hole 262 communicated with the liquid discharge pipe 27 is formed at the lowest position of the tank bottom surface 261 of the neutralization tank 26 in the horizontal direction, so that the waste liquid in the neutralization tank 26 can be completely drained, and the phenomenon of liquid accumulation in the neutralization tank 26 is avoided.
In order to avoid the phenomenon of backflow and overflow of the waste liquid in the dilution tank 2, a first overflow-preventing hole 211 is formed in the side surface of each dilution tank 2, and the first overflow-preventing hole 211 is vertically arranged near the top end of the dilution tank 2 and is communicated with the neutralization tank 26 through the overflow groove 25. Moreover, in order to avoid the backflow overflow phenomenon of the waste liquid in the neutralization tank 26, the tank side of the neutralization tank 26 is provided with a second overflow preventing hole 263, and the second overflow preventing hole 263 is disposed near the top end of the neutralization tank 26 in the vertical direction and is communicated with the drain pipe 27.
In this embodiment, the organic waste liquid collecting tank 18 is communicated with the waste liquid barrel 23 through the first liquid guiding tube 22, the waste liquid barrel 23 is located below the organic waste liquid collecting tank 18 in the vertical direction, and the bottom surface 181 of the organic waste liquid collecting tank 18 is in an inverted frustum shape, so that the waste liquid in the organic waste liquid collecting tank 18 can smoothly flow into the waste liquid barrel 23 for storage. In addition, an acid-base waste liquid collecting tank 17 of this embodiment is communicated with a dilution tank 2 through a second liquid guiding pipe 21, and the exit end of a second liquid guiding pipe 21 is inserted into a dilution tank 2, and the dilution tank 2 is located below the acid-base waste liquid collecting tank 17 in the vertical direction, and the tank bottom surface of each acid-base waste liquid collecting tank 17 is in the shape of an inverted circular truncated cone, so that the waste liquid in the acid-base waste liquid collecting tank 17 can smoothly flow into the dilution tank 2. In order to detect the waste liquid level in the neutralization tank 26, a liquid level sensor (not shown) is provided in the neutralization tank 26 in this embodiment. In addition, the first control switch 24 and the second control switch 19 of the present embodiment may be various types such as an electromagnetic switch, a manual switch, or an automatic induction switch.
In order to further improve the safety of liquid waste treatment, this embodiment laboratory liquid waste treatment device 1 still includes cabinet 11, exhaust hole 111 has been seted up to cabinet 11 on vertical ascending top face, exhaust hole 111 is linked together with exhaust system (not marking), organic waste liquid collecting vat 18, a plurality of acid-base waste liquid collecting vats 17, a plurality of dilution tank 2, neutralization pond 26 and waste liquid bucket 23 are located cabinet 11's inside, make the gas that produces when various waste liquids in the neutralization pond 26 carry out neutralization treatment discharge to exhaust system through exhaust hole 111, thereby avoid the poisonous gas pollution laboratory environment that produces when various waste liquids neutralize, guarantee laboratory personnel's safety. Specifically, first venthole 181 has been seted up to the top face of this embodiment organic waste liquid collecting vat 18 in vertical side, second venthole 171 has been seted up to each acid-base waste liquid collecting vat 17 in vertical side's top face for the gaseous first venthole 181 of can following of the waste liquid in the organic waste liquid collecting vat 18 production in diluting the process is discharged, and the gaseous second venthole 171 of following of the waste liquid in the acid-base waste liquid collecting vat 17 production in diluting the process can be discharged, discharge to exhaust system through exhaust hole 111 at last, guarantee laboratory personnel safety.
In order to further improve the convenience of waste liquid treatment, the side opening of the organic waste liquid collecting tank 18 of the embodiment is provided with a first door plate 183, the first door plate 183 is hinged to the organic waste liquid collecting tank 18 and can open and close the side opening of the organic waste liquid collecting tank 18, and the side opening of each acid-base waste liquid collecting tank 17 is provided with a second door plate 173, and the second door plate 173 is hinged to the acid-base waste liquid collecting tank 17 and can open and close the side opening of the acid-base waste liquid collecting tank 17. Specifically, the first door panel 183 covers the side opening of the organic waste liquid collecting tank 18 through magnetic adsorption, the second door panel 173 covers the side opening of the acid-base waste liquid collecting tank 17 through magnetic adsorption, a first handle 1831 is convexly arranged on the outer side surface of the first door panel 183, and a second handle 1731 is convexly arranged on the outer side surface of the second door panel 173, so that the first door panel 183 and the second door panel 173 can be conveniently opened and closed.
In order to avoid the overflow phenomenon occurring in the organic waste liquid collecting tank 18 and the acid-base waste liquid collecting tank 17, the side opening of the organic waste liquid collecting tank 18 is provided with a first anti-overflow plate 182, the first anti-overflow plate 182 is connected with the tank bottom surface of the organic waste liquid collecting tank 18, and the side opening of each acid-base waste liquid collecting tank 17 is provided with a second anti-overflow plate 172, and the second anti-overflow plate 172 is connected with the tank bottom surface of the acid-base waste liquid collecting tank 17.
In order to facilitate the maintenance of the components inside the cabinet 11, a cabinet door 112 capable of being opened and closed is disposed on the side of the cabinet 11. In order to avoid the laboratory waste liquid treatment device 1 weeping phenomenon and polluted environment, the bottom of the cabinet body 11 of this embodiment is provided with the leakage tray (not marking), and the leakage tray is used for accepting the outer waste liquid that leaks of organic waste liquid collecting vat 18, a plurality of acid-base waste liquid collecting vat 17, dilution pipe 12, a plurality of dilution tank 2, neutralization pond 26, fluid-discharge tube 27 and waste liquid bucket 23 etc. improves laboratory waste liquid treatment device 1's safety protection level.
Above embodiment is only the preferred example of the utility model discloses a do not limit the utility model discloses the implementation scope, the event all is according to the utility model discloses the equivalent change or the decoration that structure, characteristic and principle were done of application for patent scope all should be included in the utility model discloses the patent application scope.
Claims (10)
1. The laboratory waste liquid treatment device comprises an organic waste liquid collecting tank and a plurality of acid-base waste liquid collecting tanks, and is characterized by further comprising a dilution pipe, a plurality of dilution tanks, a neutralization pond, a liquid discharge pipe and a waste liquid barrel;
a first control switch is arranged at the first end of the dilution pipe, a first branch pipe and a second branch pipe are communicated with the second end of the dilution pipe, the first branch pipe is communicated with a plurality of first spraying pipes, the outlet ends of the first spraying pipes are respectively inserted into the organic waste liquid collecting tank and the acid-base waste liquid collecting tank, and each first spraying pipe is provided with a second control switch;
the second branch pipe is communicated with a plurality of second spray pipes, the outlet ends of the second spray pipes are respectively inserted into the plurality of dilution grooves, the plurality of dilution grooves are respectively communicated with the neutralization pond, and the liquid discharge pipe is communicated with the neutralization pond;
and one acid-base waste liquid collecting tank is communicated with one diluting tank, and the organic waste liquid collecting tank is communicated with the waste liquid barrel.
2. The laboratory waste liquid treatment apparatus according to claim 1, wherein:
the bottom surface of each dilution tank is arranged in a downward inclined mode relative to the horizontal direction, and the lowest position of the bottom surface of each dilution tank in the horizontal direction is provided with a first drainage hole communicated with the neutralization tank;
and/or a first anti-overflow hole is formed in the side surface of each dilution tank, and the first anti-overflow holes are arranged close to the top end of each dilution tank in the vertical direction and communicated with the neutralization tank.
3. The laboratory waste liquid treatment apparatus according to claim 1, characterized in that:
the bottom surface of the neutralization pond is arranged in a downward inclined manner relative to the horizontal direction, and the lowest position of the bottom surface of the neutralization pond in the horizontal direction is provided with a second liquid discharge hole communicated with the liquid discharge pipe;
and/or a second anti-overflow hole is formed in the side surface of the neutralization pond, is close to the top end of the neutralization pond in the vertical direction and is communicated with the liquid discharge pipe.
4. The laboratory waste liquid treatment apparatus according to claim 1, characterized in that:
the organic waste liquid collecting tank is communicated with the waste liquid barrel through a first liquid guide pipe;
and/or the waste liquid barrel is vertically positioned below the organic waste liquid collecting tank;
and/or the bottom surface of the organic waste liquid collecting tank is arranged in an inverted round table shape.
5. The laboratory waste liquid treatment apparatus according to claim 1, characterized in that:
the acid-base waste liquid collecting tank is communicated with the diluting tank through a second liquid guiding pipe, and the outlet end of the second liquid guiding pipe is inserted into the diluting tank;
and/or the dilution tank is positioned below the acid-base waste liquid collecting tank in the vertical direction;
and/or the bottom surface of each acid-base waste liquid collecting tank is arranged in an inverted round table shape.
6. The laboratory waste liquid treatment apparatus according to claim 1, wherein:
and a liquid level sensor is arranged in the neutralization tank.
7. The laboratory waste treatment apparatus according to any one of claims 1 to 6, characterized in that:
the laboratory waste liquid treatment device also comprises a cabinet body, wherein the top end surface of the cabinet body in the vertical direction is provided with an exhaust hole, and the exhaust hole is communicated with an exhaust system;
the organic waste liquid collecting tank, the acid-base waste liquid collecting tanks, the dilution tanks, the neutralization tank and the waste liquid barrel are positioned in the cabinet body.
8. The laboratory waste liquid treatment apparatus according to claim 7, characterized in that:
a first air outlet hole is formed in the top end face of the organic waste liquid collecting tank in the vertical direction;
and/or a second air outlet is formed in the top end face of each acid-base waste liquid collecting tank in the vertical direction.
9. The laboratory waste liquid treatment apparatus according to claim 8, wherein:
a first door plate is arranged at the side opening of the organic waste liquid collecting tank, is hinged with the organic waste liquid collecting tank and can open and close the side opening of the organic waste liquid collecting tank;
and/or each side opening department of acid-base waste liquid collecting vat is provided with the second door plant, the second door plant with acid-base waste liquid collecting vat is articulated and can the switching the side opening of acid-base waste liquid collecting vat.
10. The laboratory waste liquid treatment apparatus according to claim 9, wherein:
a first spill plate is arranged at the side opening of the organic waste liquid collecting tank and connected with the bottom surface of the organic waste liquid collecting tank;
and/or each side opening department of acid-base waste liquid collecting vat is provided with the second anti-overflow board, the second anti-overflow board with the tank bottom face of acid-base waste liquid collecting vat is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220518669.XU CN217555874U (en) | 2022-03-09 | 2022-03-09 | Laboratory waste liquid treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220518669.XU CN217555874U (en) | 2022-03-09 | 2022-03-09 | Laboratory waste liquid treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217555874U true CN217555874U (en) | 2022-10-11 |
Family
ID=83468732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220518669.XU Active CN217555874U (en) | 2022-03-09 | 2022-03-09 | Laboratory waste liquid treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217555874U (en) |
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2022
- 2022-03-09 CN CN202220518669.XU patent/CN217555874U/en active Active
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