CN219333448U - Cutting fluid filtration equipment - Google Patents
Cutting fluid filtration equipment Download PDFInfo
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- CN219333448U CN219333448U CN202223536688.4U CN202223536688U CN219333448U CN 219333448 U CN219333448 U CN 219333448U CN 202223536688 U CN202223536688 U CN 202223536688U CN 219333448 U CN219333448 U CN 219333448U
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- cutting fluid
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model provides cutting fluid filtering equipment, belongs to the technical field of wire cutting, and solves the problem that manual cleaning of blockage is inconvenient in the prior art. The utility model discloses a plurality of filter tanks, which are provided with filter pipelines and are used for filtering cutting fluid; the detection device is arranged on the filter pipeline and used for detecting and judging whether the filter tank is blocked; the flushing pipeline is arranged on the filtering tank and used for flushing the filtering unit in the filtering tank; and a valve assembly for switching a plurality of filter tanks to work through the valve. According to the utility model, whether the filter tank is blocked or not is detected by arranging the detection device, if so, the filter pipeline is switched to the other filter tank for filtering by the valve assembly, and the filter pipeline is flushed without stopping the machine and manually cleaning, so that the filtering efficiency is improved; and through setting up ultrasonic cleaning device can make the liquid cavitation that washes, the silicon mud is difficult for bonding, can use the filter unit of bigger mesh number in order to improve filter fineness, reduces the breakage rate of cutting line.
Description
Technical Field
The utility model belongs to the technical field of wire cutting, and particularly relates to cutting fluid filtering equipment.
Background
Wire cutting equipment is commonly used for cutting, squaring and slicing silicon rods, and in these processing flows, a cutting fluid is required, and the cleaning degree of the cutting fluid often affects the processing quality of the silicon rods.
The cutting fluid circulation process of the wire cutting machine in the current market comprises the following steps: cutting fluid is sent to the filtering tank from the cutting fluid trolley through the water pump to be filtered, the filtered cutting fluid is sent to the cutting chamber after being cooled by the heat exchanger, and finally flows back to the cutting fluid trolley from a fluid leakage port of the cutting chamber, so that circulation is completed. The filter tank contains a filter unit for filtering large particle magazines such as fragments, broken diamond wires, etc. in the cutting fluid. However, the current filter tank has the following technical problems:
the filter unit is made of nylon, the filter unit in the filter tank needs to be cleaned once every one cutter of the wire cutting machine, and the filter unit needs to be replaced every 2-3 cutters. When the cleaning device is used for cleaning, the filtering tank is manually opened, the water gun is used for flushing the filtering unit, the cleaning efficiency is low, a large amount of silicon mud is adhered to the filtering unit, and the cleaning degree of the filtering unit is difficult to ensure only by flushing with the water gun.
Therefore, the technical problem to be solved by the application is as follows: cutting fluid filtration of the slicing machine is easy to block and break, and the cleaning is inconvenient.
Disclosure of Invention
The utility model aims at solving the problems in the prior art and provides cutting fluid filtering equipment capable of automatically switching a filtering pipeline and flushing, and the technical scheme of the utility model can achieve the following technical effects: the cutting fluid can not interrupt the filtration because of the filtration tank is stopped up when filtering, and it can switch to the filtration pipeline of another filtration tank and filter to but self-cleaning blocks up the filter unit, need not manual operation.
The aim of the utility model can be achieved by the following technical scheme: a cutting fluid filtration apparatus comprising: a plurality of filtering tanks are arranged on the filter tank,
the filtering pipeline is arranged on the filtering tank and used for filtering the cutting fluid;
the detection device is arranged on the filter pipeline and used for detecting and judging whether the filter tank is blocked or not;
the flushing pipeline is arranged on the filtering tank and used for flushing the filtering unit in the filtering tank;
the valve component is arranged among the plurality of filter tanks and used for switching the plurality of filter tanks.
The filter tanks can work in a time-sharing mode, when one filter tank is blocked, the filter tank can be detected by the detection device, the detection device can be connected to the PLC control system, the filter pipeline is switched through the control valve assembly of the PLC control system, the filter pipeline of the other filter tank is used for filtering, the blocked filter unit in the filter tank is flushed through the flushing pipeline to wash out blocked silicon mud, after the other filter tank is blocked, the filter tank is switched back to the original filter tank, the filter tank at the moment is flushed, the filter tank can continue to filter, and the seamless circulation is realized, so that the filtering efficiency of cutting fluid and the cleaning efficiency of the filter unit can be effectively improved.
In the cutting fluid filtering device, the filtering pipeline comprises a cutting fluid inlet, a filtering tank body and a fluid outlet which are arranged on the filtering tank; the flushing pipeline comprises a flushing liquid inlet, a filtering tank body and a liquid outlet which are arranged on the filtering tank; the cutting fluid inlet can be used for leading cutting fluid into the tank body of the filtering tank, filtering is carried out through the filtering unit arranged in the tank body of the filtering tank, and the flushing fluid inlet can be used for leading flushing fluid into the tank body of the filtering tank to clean the filtering unit. The cutting fluid inlet is used for allowing cutting fluid to enter, impurities remain on the filtering unit after the cutting fluid flows through the filtering unit of the filtering tank, and the filtered cutting fluid flows out from the liquid outlet to finish filtering; the flushing liquid inlet is used for the flushing liquid to enter, the flushing liquid is introduced to clean the filter unit in the filter tank, and the flushing liquid after flushing flows out from the liquid outlet.
In the above cutting fluid filtering apparatus, the valve assembly includes:
the cutting fluid inlet valve is arranged among the cutting fluid inlets of the adjacent filter tanks;
the flushing liquid inlet valve is arranged between the flushing liquid inlets of the plurality of adjacent filter tanks;
the cutting fluid inlet valve can be switched to be connected with or disconnected from one of the adjacent cutting fluid inlets, and the flushing inlet valve can be switched to be connected with or disconnected from one of the adjacent flushing fluid inlets.
The cutting fluid inlet valve can switch the filtering pipelines of the two filtering tanks, so that the filtering pipeline of one filtering tank is communicated, and the filtering pipeline of the other filtering tank is disconnected; the flushing inlet valve can switch the flushing pipelines of the two filter tanks, so that the flushing pipeline of one filter tank is communicated, and the flushing pipeline of the other filter tank is disconnected.
In the cutting fluid filtering device, the cutting fluid inlet valve and the flushing inlet valve are three-way valves, a first total inlet is arranged on the cutting fluid inlet valve, and a second total inlet is arranged on the flushing inlet valve.
The cutting fluid inlet valve and the flushing fluid inlet valve are preferably pneumatic three-way valves, so that the control is convenient, the first total fluid inlet can be used for supplying cutting fluid, and the second total fluid inlet can be used for supplying flushing fluid.
In the cutting fluid filtering device, the detection device comprises pressure sensors respectively arranged at the cutting fluid inlet and the cutting fluid outlet.
The pressure sensors are arranged at the liquid inlet and the liquid outlet of the cutting liquid, the pressure difference of the cutting liquid before and after filtration can be measured, data are transmitted to an external PLC control system, when the pressure difference rises to a preset value, the PLC control system judges that the filtration pipeline is in a blocking state, and the valve component can be controlled to switch another filtration pipeline. )
In the cutting fluid filtering device, the filtering tank is further provided with an ultrasonic cleaning device capable of cleaning the inside of the filtering tank by ultrasonic waves.
When the filter tank is blocked, the flushing pipeline can be communicated for flushing, and the ultrasonic cleaning device is started when flushing, so that liquid in the filter tank can form cavitation bubbles, the cleaning of the filter unit is accelerated, and the cleaning effect is improved.
In the above cutting fluid filtering apparatus, the ultrasonic cleaning device includes an ultrasonic rod and an ultrasonic generator disposed on the filter tank.
The ultrasonic generator is connected with the equipment to generate a high-frequency alternating current signal, and the ultrasonic rod is connected with the ultrasonic rod generator to generate ultrasonic vibration through transduction.
In the above cutting fluid filtering device, the liquid outlet is connected with a cutting fluid liquid discharge pipe and a flushing fluid liquid discharge pipe respectively, a cutting fluid liquid discharge valve is arranged between the cutting fluid liquid discharge pipes of adjacent filtering tanks, the cutting fluid liquid discharge valve can be switched to be communicated with/disconnected from the liquid outlet of the adjacent filtering tanks, the flushing fluid discharge pipe is provided with a liquid discharge control valve and an emptying port, and the liquid discharge control valve can enable the liquid outlet to be communicated with/disconnected from the emptying port.
The liquid outlet is respectively connected with the cutting liquid discharge pipe and the flushing liquid discharge pipe, so that the cutting liquid and the flushing liquid can be discharged separately.
In the cutting fluid filtering device, the cutting fluid drain valve is a three-way valve, and the cutting fluid drain valve is provided with a cutting fluid drain port. And discharging the filtered cutting fluid through a cutting fluid discharge port.
In the cutting fluid filtering device, the drain control valve is a pinch valve.
Compared with the prior art, the utility model detects whether the filter tank is blocked or not by arranging the detection device, if so, the filter pipeline is switched to the other filter tank for filtering by the valve component, and the former is washed without stopping the machine and manually cleaning, so that the filtering efficiency is improved; through setting up ultrasonic cleaning device can make the liquid cavitation that washes, the silicon mud is difficult for bonding, can use the filter unit of bigger mesh number in order to improve filter fineness, reduces the breakage rate of cutting line.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic perspective view of a single filter canister of the present utility model;
FIG. 3 is a simplified schematic diagram of a filtration line of the present utility model;
FIG. 4 is a simplified schematic diagram of a flush line of the present utility model;
in the figure, 100, a filter tank; 110. a filter pipeline; 120. flushing the pipeline; 101. a cutting fluid inlet; 102. a filter tank body; 103. a liquid outlet; 104. a flushing liquid inlet; 105. a filtering unit; 200. a valve assembly; 210. a cutting fluid inlet valve; 211. a first total liquid inlet; 220. a flushing inlet valve; 221. a second total liquid inlet; 130. an ultrasonic bar; 300. a cutting fluid discharge pipe; 310. a cutting fluid discharge valve; 311. a cutting fluid discharge port; 400. a flushing liquid drain pipe; 410. a liquid discharge control valve; 420. and an evacuation port.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
As shown in fig. 1-2, the present utility model includes: a plurality of the filter canisters 100 are provided,
a filtering pipe 110 disposed on the filtering tank 100 for filtering the cutting fluid;
the detection device is arranged on the filtering pipeline 110 and is used for detecting and judging whether the filtering tank 100 is blocked or not;
a flushing pipe 120 provided on the filter tank 100 for flushing the filter unit 105 in the filter tank 100;
a valve assembly 200 through which a plurality of the filter canisters 100 are switched to operate.
The plurality of filter tanks 100 can work in a time-sharing manner, when one of the filter tanks 100 is blocked, the filter tank 100 can be detected by a detection device, the detection device can be connected to a PLC control system (not shown in the figure), the valve assembly 200 is controlled by the PLC control system to switch the filter pipeline 110, the filter pipeline 110 of the other filter tank 100 is used for filtering, the blocked filter tank 100 is flushed by flushing pipeline 120 to flush the blocked silicon mud, after the other filter tank 100 is blocked, the filter tank 100 is switched back to the original filter tank 100, and the filter tank 100 at the moment can continue filtering after being flushed, so that the seamless circulation can be realized, and the filtering efficiency and the filtering effect of the cutting fluid can be effectively improved.
As shown in fig. 3, the arrow direction in the drawing is the liquid flow direction of the filtering pipeline 110, and the filtering pipeline 110 includes a cutting liquid inlet 101, a filtering tank body 102 and a liquid outlet 103 which are arranged on the filtering tank 100; as shown in fig. 4, the direction of the arrow of the drawing is the liquid flow direction of the flushing pipeline 120, the flushing pipeline 120 includes a flushing liquid inlet 104, a filtering tank body 102 and a liquid outlet 103, which are disposed on the filtering tank 100, and the cutting liquid inlet 101 is located above the flushing liquid inlet 104.
The cutting fluid inlet 101 is used for cutting fluid to enter, impurities remain on the filtering unit 105 after the cutting fluid flows through the filtering unit 105 of the filtering tank 100, and the filtered cutting fluid flows out from the liquid outlet 103 to finish filtering; the flushing liquid inlet 104 is used for the flushing liquid to enter, the flushing liquid is introduced into the filtering unit 105 in the washable filtering tank 100, and the flushed flushing liquid flows out from the liquid outlet 103.
The valve assembly 200 includes a cutting fluid inlet valve 210 disposed between the cutting fluid inlets 101 of adjacent filter canisters 100 and a flushing fluid inlet valve 220 disposed between the flushing fluid inlets 104 of adjacent filter canisters 100, the cutting fluid inlet valve 210 being switchable to connect to/disconnect from one of the cutting fluid inlets 101, the flushing fluid inlet valve 220 being switchable to connect to/disconnect from one of the flushing fluid inlets 104.
The cutting fluid inlet valve 210 may switch the filter lines 110 of the two filter tanks 100 such that the filter line 110 of one filter tank 100 is connected and the filter line 110 of the other filter tank 100 is disconnected; the rinse inlet valve 220 may switch the rinse lines 120 of two filter canisters 100 such that the rinse line 120 of one filter canister 100 is connected and the rinse line 120 of the other filter canister 100 is disconnected.
The cutting fluid inlet valve 210 and the flushing fluid inlet valve 220 are three-way valves, a first total fluid inlet 211 is arranged on the cutting fluid inlet valve 210, and a second total fluid inlet 221 is arranged on the flushing fluid inlet valve 220.
The cutting fluid inlet valve 210 and the flushing fluid inlet valve 220 are preferably pneumatic three-way valves, which are convenient to control, the first total fluid inlet 211 can be used for feeding cutting fluid, and the second total fluid inlet 221 can be used for feeding flushing fluid.
The detection device comprises pressure sensors respectively arranged at the cutting fluid inlet 101 and the fluid outlet 103. By providing pressure sensors at the cutting fluid inlet 101 and the fluid outlet 103, the pressure difference between the cutting fluid before and after filtration can be measured, and data is transmitted to an external PLC control system, when the pressure difference rises to a preset value, the PLC control system determines that the filtration pipeline 110 is in a blocked state, and can control the valve assembly 200 to switch another filtration pipeline 110.
The filter tank 100 is further provided with an ultrasonic cleaning device capable of cleaning the interior of the filter tank 100 by ultrasonic waves. When the filter tank 100 is blocked, the flushing pipeline 120 can be communicated for flushing, and the ultrasonic cleaning device is started while flushing, so that cavitation bubbles can be formed in the liquid in the filter tank 100, the cleaning of the filter unit 105 is accelerated, and the cleaning effect is also improved.
The ultrasonic cleaning apparatus includes an ultrasonic rod 130 and an ultrasonic generator (not shown) provided on the canister 100. The ultrasonic generator is connected with equipment to generate high-frequency alternating current signals, and the ultrasonic rod 130 is connected with the ultrasonic rod 130 generator to generate ultrasonic vibration through transduction.
The liquid outlet 103 is respectively connected with a cutting liquid discharge pipe 300 and a flushing liquid discharge pipe 400, a cutting liquid discharge valve 310 is arranged between the cutting liquid discharge pipes 300 of adjacent filter tanks 100, the cutting liquid discharge valve 310 can be switched to be communicated with/disconnected from the liquid outlet 103 of the adjacent filter tank 100, the flushing liquid discharge pipe 400 is provided with a liquid discharge control valve 410 and an emptying port 420, and the liquid discharge control valve 410 can enable the liquid outlet 103 to be communicated with/disconnected from the emptying port 420. By connecting the liquid outlet 103 to the cutting liquid discharge pipe 300 and the rinse liquid discharge pipe 400, respectively, the cutting liquid and the rinse liquid can be discharged separately.
The cutting fluid discharge valve 310 is a three-way valve, and a cutting fluid discharge port 311 is arranged on the cutting fluid discharge valve 310. The filtered cutting fluid is discharged through the cutting fluid discharge port 311. The drain control valve 410 is a pinch valve.
The working principle of the utility model is as follows: in the initial state, the left filtering tank 100 is not blocked, the first total liquid inlet 211 of the cutting liquid inlet valve 210 is communicated with the left cutting liquid inlet 101, the second total liquid inlet 221 of the flushing liquid inlet valve 220 is communicated with the right cutting liquid inlet 101, the cutting liquid outlet 311 of the cutting liquid outlet valve 310 is communicated with the left liquid outlet 103, the left pinch valve is closed, the right pinch valve is opened, cutting liquid enters the left filtering tank 100, after being filtered by the filtering unit 105 in the filtering tank 100, flows from the liquid outlet 103 to the cutting liquid outlet 311 and is discharged, flushing liquid enters the right filtering tank 100, after flushing the filtering unit 105 in the filtering tank 100, the flushing liquid flows through the pinch valve from the liquid outlet 103, and finally is discharged from the emptying port 420; when the left filtering tank 100 is blocked, the pressure difference before and after filtering detected by the pressure sensor reaches a preset value and is sent to the PLC control system, the PLC control system controls the valve assembly 200 to switch, the first total liquid inlet 211 of the cutting liquid inlet valve 210 is switched to be communicated with the cutting liquid inlet 101 on the right side, the second total liquid inlet 221 of the flushing liquid inlet valve 220 is communicated with the cutting liquid inlet 101 on the left side, the cutting liquid outlet 311 of the cutting liquid outlet valve 310 is communicated with the liquid outlet 103 on the right side, the left pinch valve is opened, the right pinch valve is closed, the cutting liquid enters the filtering tank 100 on the right side, after being filtered by the filtering unit 105 in the filtering tank 100, flows from the liquid outlet 103 to the cutting liquid outlet 311 for discharging, the flushing fluid enters the left filter tank 100, washes the filter unit 105 blocked in the filter tank 100, flows through the pinch valve from the liquid outlet 103, is finally discharged from the emptying port 420, after reaching the preset emptying time, the left pinch valve is closed, the liquid in the left filter tank 100 is gradually filled, the ultrasonic device is started at the moment, the ultrasonic rod 130 vibrates to enable the liquid in the left filter tank 100 to cavitate, the flushing efficiency is accelerated, after reaching the preset ultrasonic cleaning time, the left pinch valve is opened again, the polluted flushing fluid is discharged, after reaching the preset emptying time, the left pinch valve is closed again until the pressure sensor detects that the right filter tank 100 is blocked, the reverse operation is performed to switch the valve, and the cycle is repeated, so that the two filter tanks 100 can be intermittently filtered and flushed.
According to the utility model, whether the filter tank 100 is blocked or not is detected by arranging the detection device, if so, the filter pipeline 110 is switched to the other filter tank 100 for filtering by the valve assembly 200, and the former is washed without stopping the machine and manually cleaning, so that the filtering efficiency is improved; through setting up ultrasonic cleaning device can make the liquid cavitation that washes, and the silicon mud is difficult for bonding, can use the filtration unit 105 of bigger mesh number in order to improve filtering precision, reduces the breakage rate of cutting line.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (10)
1. A cutting fluid filtration apparatus, comprising:
a plurality of filter canisters (100),
a filter pipe (110) provided on the filter tank (100) for filtering a cutting fluid;
a flushing pipeline (120) which is arranged on the filter tank (100) and is used for flushing the filter unit (105) in the filter tank (100);
the detection device is arranged on the filtering pipeline (110) and is used for detecting and judging whether the filtering tank (100) is blocked or not;
and a valve assembly (200) arranged between the plurality of filter tanks (100) for switching the plurality of filter tanks (100).
2. The cutting fluid filtration device of claim 1, wherein,
the filtering pipeline (110) comprises a cutting fluid inlet (101), a filtering tank body (102) and a fluid outlet (103) which are arranged on the filtering tank (100);
the flushing pipeline (120) comprises a flushing liquid inlet (104), a filtering tank body (102) and a liquid outlet (103) which are arranged on the filtering tank (100);
cutting fluid feed inlet (101) can be with cutting fluid lets in filtering jar body (102), filters through filtering unit (105) that set up in filtering jar body (102), flushing fluid feed inlet (104) can let in the flushing fluid and filter unit (105) in filtering jar body (102).
3. The cutting fluid filtration device of claim 2, wherein,
the valve assembly (200) includes:
a cutting fluid inlet valve (210) arranged between cutting fluid inlets (101) of a plurality of adjacent filter tanks (100);
a flushing inlet valve (220) arranged between the flushing inlet ports (104) of a plurality of adjacent filter tanks (100);
the cutting fluid inlet valve (210) can be switched to be connected with or disconnected from one of the adjacent plurality of cutting fluid inlets (101), and the flushing fluid inlet valve (220) can be switched to be connected with or disconnected from one of the adjacent plurality of flushing fluid inlets (104).
4. A cutting fluid filtering apparatus according to claim 3, wherein the cutting fluid inlet valve (210) and the flushing inlet valve (220) are three-way valves, a first total inlet (211) is provided on the cutting fluid inlet valve (210), and a second total inlet (221) is provided on the flushing inlet valve (220).
5. The cutting fluid filtering apparatus as claimed in claim 2, 3 or 4, wherein the detecting means comprises pressure sensors respectively provided at the cutting fluid inlet (101) and the fluid outlet (103).
6. The cutting fluid filtration apparatus according to claim 1 or 2 or 3 or 4, wherein: the filter tank (100) is also provided with an ultrasonic cleaning device which can carry out ultrasonic cleaning in the filter tank (100).
7. The cutting fluid filtering apparatus as claimed in claim 6, wherein the ultrasonic cleaning device comprises an ultrasonic rod (130) and an ultrasonic generator provided on the filter tank (100).
8. The cutting fluid filtering apparatus as claimed in claim 2, 3 or 4, wherein the fluid outlet (103) is connected with a cutting fluid drain pipe (300) and a flushing fluid drain pipe (400), a cutting fluid drain valve (310) is disposed between adjacent cutting fluid drain pipes (300), the cutting fluid drain valve (310) is switchable to be connected to/disconnected from the adjacent fluid outlet (103), the flushing fluid drain pipe (400) is provided with a drain control valve (410) and an emptying port (420), and the drain control valve (410) is capable of enabling the fluid outlet (103) to be connected to/disconnected from the emptying port (420).
9. The cutting fluid filtering apparatus as claimed in claim 8, wherein the cutting fluid drain valve (310) is a three-way valve, and the cutting fluid drain valve (310) is provided with a cutting fluid drain port (311).
10. The cutting fluid filtration apparatus of claim 8, wherein the drain control valve (410) is a pinch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223536688.4U CN219333448U (en) | 2022-12-29 | 2022-12-29 | Cutting fluid filtration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223536688.4U CN219333448U (en) | 2022-12-29 | 2022-12-29 | Cutting fluid filtration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219333448U true CN219333448U (en) | 2023-07-14 |
Family
ID=87097040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223536688.4U Active CN219333448U (en) | 2022-12-29 | 2022-12-29 | Cutting fluid filtration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219333448U (en) |
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2022
- 2022-12-29 CN CN202223536688.4U patent/CN219333448U/en active Active
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