CN220829528U - Emulsified asphalt stability detection device - Google Patents
Emulsified asphalt stability detection device Download PDFInfo
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- CN220829528U CN220829528U CN202322636685.6U CN202322636685U CN220829528U CN 220829528 U CN220829528 U CN 220829528U CN 202322636685 U CN202322636685 U CN 202322636685U CN 220829528 U CN220829528 U CN 220829528U
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- 239000010426 asphalt Substances 0.000 title claims abstract description 41
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 102
- 238000001914 filtration Methods 0.000 claims abstract description 49
- 238000012545 processing Methods 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims description 32
- 230000000903 blocking effect Effects 0.000 claims description 18
- 239000000839 emulsion Substances 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 34
- 239000002245 particle Substances 0.000 abstract description 18
- 238000002474 experimental method Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 238000012216 screening Methods 0.000 abstract description 12
- 238000005507 spraying Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 6
- 238000005086 pumping Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The application relates to an emulsified asphalt stability detection device, and relates to the manufacturing field of an emulsified asphalt material mechanical circulation stability experiment test device. The utility model provides an emulsified asphalt stability detection device includes circulation system, control system and box, and circulation system installs in the box inside, and circulation system installs the control system who is used for controlling circulation system above, and circulation system includes processing mechanism, power unit, collection mechanism, filtering mechanism and pipeline, and processing mechanism, power unit, collection mechanism and filtering mechanism link to each other through pipeline order head and tail and form closed passageway. The application can simulate the material spraying process and the mechanical shearing process under the actual condition, the aggregated particles generated by demulsification in the sample to be tested can be filtered out by the filtering mechanism, and whether the sample has qualified mechanical stability can be rapidly judged by observing the residue condition of the particles, calculating the residue ratio of the filtering mechanism and comparing the residue ratio with the standard ratio, so that the speed of screening qualified materials is improved.
Description
Technical Field
The application relates to an emulsified asphalt stability detection device, and relates to the manufacturing field of an emulsified asphalt material mechanical circulation stability experiment test device.
Background
For the maintenance market, the emulsified asphalt is one of the main materials, has many advantages of saving energy, facilitating construction, protecting environment and the like, and particularly has great economic and social benefits for the maintenance of high-grade pavement. In the construction process of emulsified asphalt and high polymer modified emulsified asphalt mixture, mechanical shearing processes such as pumping, stirring and the like are needed, the emulsified asphalt can be demulsified due to poor mechanical stability, and particle aggregation phenomenon is generated, and the aggregated particles are easy to cause blockage of a pump and a pipeline. Therefore, the emulsified asphalt material must be subjected to stability detection to screen qualified materials before being put into engineering use, but in practical situations, the existing equipment has complex detection flow and inconvenient manual operation.
In conclusion, the operation flow of the existing emulsified asphalt material stability detection equipment is complex, and the screening speed of qualified emulsified asphalt materials is slower.
Disclosure of utility model
In order to rapidly detect whether a material sample has qualified mechanical stability, the application provides an emulsified asphalt stability detection device.
The application provides an emulsified asphalt stability detection device, which adopts the following technical scheme:
The utility model provides an emulsified asphalt stability detection device, includes circulation system, control system and box, and circulation system installs in the box inside, and circulation system installs the control system who is used for controlling circulation system above the circulation system, and circulation system includes processing mechanism, power unit, collection mechanism, filtering mechanism and pipeline. The processing mechanism, the power mechanism, the collecting mechanism and the filtering mechanism are sequentially connected end to end through pipelines to form a closed passage.
By adopting the technical scheme, the control system can control the power mechanism responsible for providing power in the circulation system to adjust the feeding flow in the detection, and can also control the processing mechanism responsible for stirring the sample in the circulation system to adjust the rotating speed of the sample in the detection, so that the application can simulate the material spraying process and the mechanical shearing process under the actual condition. After the sample to be tested is poured into the sample barrel, the sample to be tested sequentially flows through the processing mechanism, the power mechanism and the filtering mechanism and is periodically circulated, aggregate particles generated by demulsification in the sample to be tested can be filtered out by the filtering mechanism, and whether the sample has qualified mechanical stability can be rapidly judged by observing the residue condition of the particles, calculating the residue ratio of the filtering mechanism and comparing the residue ratio with the standard ratio, so that the speed of screening qualified materials is improved.
Optionally, the filtering mechanism includes a filtering tank, a first screen blocking strip installed on the inner wall of the filtering tank, and a first screen movably installed above the screen blocking strip.
Through adopting above-mentioned technical scheme, first screen cloth barrier strip can make first screen cloth stable in original position when filtering jar feeding, and swing joint between first screen cloth barrier strip and the first screen cloth, so first screen cloth can take out, is convenient for observe the granule and remains the condition and weigh and remain the granule quality, has promoted the speed of screening qualified material more.
Optionally, a stop valve is arranged on the pipeline between the filtering mechanism and the processing mechanism.
By adopting the technical scheme, the sectional control can be realized by opening or closing the stop valve in the detection experiment process, so that the internal condition of the filtering mechanism can be conveniently checked at any time, the experiment process can be judged, the invalid circulation times in the experiment can be reduced, and the speed of screening qualified materials can be increased more.
Optionally, the stirring assembly comprises a bracket installed at the upper end inside the sample charging basket, a motor installed at the center of the bracket, and a stirring paddle installed on a rotating shaft of the motor and vertically inserted into the sample charging basket.
Through adopting above-mentioned technical scheme, because the stirring rake is perpendicular downwards, the resistance that the motor pivot received when the stirring is little, and stirring rotational speed is even, and mechanical process in the simulation actual transportation is effectual, has promoted the accuracy of experimental result, has reduced the number of times of repetition experiment, has promoted the speed of screening qualified material more.
Optionally, the power mechanism comprises a first power structure and a second power structure which are arranged in parallel, wherein the first power structure comprises a first power pipe used for communicating the processing mechanism and the filtering mechanism and a gear pump arranged on the first power pipe; the second power structure comprises a second power pipe and a screw pump, wherein the second power pipe is used for communicating the treatment mechanism and the filtering mechanism, and the screw pump is arranged on the second power pipe.
By adopting the technical scheme, different pumps can be replaced according to different samples, a first power structure can be selected through a control system, and a gear pump in the first power structure provides proper power for detecting the emulsified asphalt material; the second power structure can also be selected, and a screw pump in the second power structure provides proper power for detecting the mixed emulsified asphalt material. The two power mechanisms which are arranged in parallel expand the application range of the application.
Optionally, the circulation system further includes a collecting mechanism, the collecting mechanism includes a first collecting structure and a second collecting structure which are arranged in parallel, the first collecting structure includes a first collecting pipe for communicating the power mechanism with the filtering mechanism, an emulsion barrel arranged on the first collecting pipe, and a stirring component arranged in the emulsion barrel, and the second collecting structure includes a second collecting pipe for communicating the power mechanism with the filtering mechanism, a mixing barrel arranged on the second collecting pipe, and the stirring component arranged in the emulsion barrel.
By adopting the technical scheme, the first collecting structure is selected to collect the emulsified asphalt material or the second collecting structure is selected to collect the mixed emulsified asphalt material, so that the screening out condition in the experimental process can be observed at any time; when the processed samples are collected and the subsequent detection is carried out, the operation process of collecting the samples is simplified by the respectively independent collecting mechanisms, the speed of screening qualified materials is improved, and the phenomenon that different types of samples are polluted by residual liquid in the charging basket is avoided.
Optionally, the inner wall of the mixing barrel is provided with the second screen blocking strip and a second screen movably arranged above the second screen blocking strip.
By adopting the technical scheme, the second screen can screen out the general particles formed after the sample is processed, so that the risk of blockage of a device pipeline is reduced, and the subsequent detection and the pretreatment operation of the actual use of the sample are simplified; meanwhile, the residue condition of the general particles can be observed, and the speed of screening qualified materials is improved.
Optionally, the bottom of sample storage bucket is provided with the sample discharge valve, the bottom of emulsion storage bucket is provided with first discharge valve, the bottom of mixing vat is provided with the second discharge valve.
Through adopting above-mentioned technical scheme, the accessible opens corresponding discharge valve after the experiment is over and carries out the ejection of compact, has simplified experimental aftertreatment process, has promoted the speed of screening qualified material.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The device can screen out aggregate particles generated by demulsification of a sample to be tested, and can rapidly judge whether the sample has qualified mechanical stability by observing the residue condition of the particles, calculating the mass ratio of residues of the filtering mechanism and comparing the mass ratio with the standard ratio, thereby improving the speed of screening qualified materials;
2. The device can realize detection of two types of samples of emulsified asphalt materials and mixed emulsified asphalt materials by selecting a proper power mechanism and a proper collecting mechanism by utilizing a control system, so that residual pollution of different types of samples in the collecting mechanism is avoided, and the application range of the detectable samples is widened;
3. The device screens out general particles through the second screen mesh, so that the risk of blockage of a device pipeline is reduced, and the subsequent detection and the pretreatment operation of the actual use of a sample are simplified.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present application;
FIG. 2 is an overall schematic of the circulation system;
FIG. 3 is a cross-sectional view of a processing mechanism;
FIG. 4 is a schematic view of the structure of the collection mechanism;
Fig. 5 is a cross-sectional view of the filter mechanism.
Reference numerals illustrate: 1. a circulation system; 11. a processing mechanism; 111. a sample barrel; 112. a sample stirring assembly; 1121. a bracket; 1122. a motor; 1123. stirring paddles; 113. a sample discharge valve; 12. a power mechanism; 121. a first power structure; 1211. a first power pipe; 1212. a gear pump; 122. a second power structure; 1221. a second power pipe; 1222. a screw pump; 13. a collection mechanism; 131. a first collection structure; 1311. a first collection tube; 1312. emulsion charging basket; 1313. a first stirring assembly; 1314. a first discharge valve; 132. a second collection structure; 1321. a second collection tube; 1322. a mixing barrel; 1323. a second stirring assembly; 1324. a second screen; 1325. a second screen barrier strip; 1326. a second discharge valve; 14. a filtering mechanism; 141. a filter tank; 142. a first screen; 143. a first screen barrier strip; 15 pipelines; 2. a control system; 3. a case; 31. a door; 4. a first three-way ball valve; 5. a second three-way ball valve; 6. a third three-way ball valve; 7. a fourth three-way ball valve; 8. and a stop valve.
Detailed Description
The application is described in further detail below with reference to fig. 1-5.
The embodiment of the application discloses an emulsified asphalt stability detection device.
Referring to fig. 1, an emulsified asphalt stability detection device comprises a circulation system 1, a control system 2 and a box body 3, wherein the circulation system 1 is installed inside the box body 3, the control system 2 for controlling the circulation system 1 is installed above the circulation system 1, and a box door 31 which is opened outwards is arranged on the side wall of the box body 3.
Referring to fig. 2, the circulation system 1 includes a treatment mechanism 11, a power mechanism 12, a collection mechanism 13, a filtration mechanism 14, and a pipe 15. The treatment mechanism 11, the power mechanism 12, the collection mechanism 13 and the filtering mechanism 14 are sequentially connected end to end through a pipeline 15 to form a closed passage.
The power mechanism 12 includes a first power structure 121 and a first power structure 122 connected in parallel by a line 15, the first power structure 121 including a first power tube 1211 and a gear pump 1212, and the first power structure 122 including a second power tube 1221 and a screw pump 1222. A first three-way ball valve 4 is provided connecting the power mechanism 12, the first power tube 1211 and the second power tube 1221. A gear pump 1212 is fixedly arranged at the midpoint of the first power tube 1211, and the gear pump 1212 is used for extracting emulsified asphalt materials with smaller volume of the internal aggregated particles; a screw pump 1222 is fixedly installed at the midpoint of the second power pipe 1221, and the screw pump 1222 is used for pumping mixed emulsified asphalt material with larger volume of accumulated particles. The second three-way ball valve 5 connects the collection mechanism 13, the first power tube 1211, and the second power tube 1221.
Referring to fig. 3, the processing mechanism 11 includes a sample barrel 111, a sample stirring assembly 112 and a sample discharge valve 113, the sample stirring assembly 112 includes a support 1121, a motor 1122 and a stirring paddle 1123, the support 1121 is fixedly installed on the upper portion of the inner wall of the sample barrel 111, the motor 1122 is installed at the center position of the lower bottom surface of the support 1121, the rotation axis of the motor 1122 is perpendicular to the bottom surface of the sample barrel 111, the stirring paddle 1123 is fixedly installed at the bottom of the rotation axis of the motor 1122, and the sample discharge valve 113 is provided at the bottom of the sample barrel 111.
Referring to fig. 4, the collection mechanism 13 includes a first collection structure 131 and a second collection structure 132 connected in parallel by a pipeline 15, the first collection structure 131 including a first collection tube 1311, an emulsion barrel 1312, a first agitation assembly 1313, and a first discharge valve 1314, and the second collection structure 132 including a second collection tube 1321, a mixing barrel 1322, a second agitation assembly 1323, a second screen 1324 and its second screen blocking strip 1325, and a second discharge valve 1326. The emulsion charging bucket 1312 for collecting the emulsified asphalt material with smaller volume of the internal aggregated particles is fixedly arranged at the midpoint position of the first collecting pipe 1311, and the first discharge valve 1314 is used for discharging the emulsified asphalt material sample after the experiment; the mixing bucket 1322 for collecting the mixed emulsified asphalt material with larger volume of the aggregated particles is fixedly arranged at the middle point of the second collecting pipe 1321, and the second discharge valve 1326 is used for discharging the sample of the mixed emulsified asphalt material after the experiment. The way of installing the first stirring assembly 1313 in the emulsion barrel 1312 and the way of installing the second stirring assembly 1323 in the mixing barrel 1322 are the same as the way of installing the sample stirring assembly 112 in the sample barrel 111, the second screen blocking strip 1325 is fixedly arranged at the lower end of the inner wall of the mixing barrel 1322, the second screen 1324 is movably connected with the second screen blocking strip 1325, and a distance exists between the second screen 1324 and the second stirring assembly 1323. The third three-way ball valve 6 is connected with the power mechanism 12, the first collecting pipe 1311 and the second collecting pipe 1321; the fourth three-way ball valve 7 connects the filtering mechanism 14, the first collection tube 1311, and the second collection tube 1321.
Referring to fig. 5, the filtering mechanism 14 includes a filtering tank 141 and a first screen 142 and a first screen blocking strip thereof, the inner wall of the filtering tank 141 is fixedly provided with a first screen blocking strip 143, the first screen blocking strip 143 is lower than the feed inlet of the filtering tank 141, the first screen blocking strip 143 is higher than the discharge outlet of the filtering tank 141, the first screen 142 is movably connected with the first screen blocking strip 143, a pipeline 15 between the filtering mechanism 14 and the collecting mechanism 13 is provided with a stop valve 8, and the stop valve 8 is used for blocking a sample from entering the filtering tank 141.
The implementation principle of the embodiment is as follows:
when the sample to be measured is mixed emulsified asphalt, the first three-way ball valve, the second three-way ball valve, the third three-way ball valve, the communication processing mechanism, the second power structure, the second collecting structure and the filtering mechanism are adjusted, the stop valve is opened, all discharge valves are closed, and the whole pipeline becomes a closed path.
The motor is started through the control system, the motor rotating shaft rotates to drive the stirring paddle to rotate, a sample can be directly poured into the sample barrel from a gap between the inner wall of the opening at the upper part of the sample barrel and the bracket, and the motor parameters are regulated through the control system, so that the stirring speed of the actual situation can be simulated; the screw pump is started by the control system, along with the continuous rotation of the screw in the pump, samples can flow in a spiral form according to the direction of the processing assembly flowing to the power assembly, and the parameters of the screw pump are adjusted by the control system, so that the sample spraying quantity can be adjusted, and the pumping condition of the actual condition can be simulated.
The sample flows through the first three-way ball valve, the second power structure, the second three-way ball valve, the third three-way ball valve, the second collecting pipe, the fourth three-way ball valve and the stop valve in sequence after being stirred and pumped, then flows into the filtering mechanism, the sample flows through the first screen after entering from the filtering tank, then flows out of the filtering tank, the diameter of the holes of the first screen is smaller than the particle diameter of aggregation particles formed after demulsification of the sample, and the aggregation particles in the sample are adhered to the first screen. After the experiment is finished, the stop valve is closed to interrupt the passage, the sample is blocked from entering the filter tank, the first screen is disassembled, the mass of the screened material is weighed, the percentage of the mass of the screened material to the mass of the known sample is calculated, and if the percentage is smaller than the required percentage in the national standard, the sample is qualified.
In the experiment, when the screen shot condition in the experimental process is observed to needs, close the passageway between second collection structure and the filtering mechanism through adjusting fourth tee bend ball valve, stirring rotational speed in the mixing vat is the same with stirring rotational speed in the sample storage vat, is equipped with the mixing vat that is used for gluing the second screen cloth of leaving big granule and can collect the sample under the current processing state. And after a period of time, continuously adjusting the third three-way ball valve, blocking the passage between the second collecting structure and the second power structure, and opening a second discharge valve at the bottom of the mixing bucket to take out the treated sample.
When the sample to be measured is emulsified asphalt material, the first three-way ball valve, the second three-way ball valve, the third three-way ball valve, the communication processing mechanism, the first power structure, the first collecting structure and the filtering mechanism are adjusted, the stop valve is opened, all discharge valves are closed, and the whole pipeline becomes a closed passage. After the sample is poured and stirred, the sample can be conveyed by the change and movement of the working volume formed between the pump cylinder of the gear pump and the meshing gear, the conveying direction is that the processing mechanism flows to the first power structure, and the sample spraying quantity can be adjusted so as to simulate the pumping condition of the actual condition. After stirring and pumping, the sample circularly flows according to a channel specified by a valve, sequentially passes through a processing mechanism, a power mechanism, a collecting mechanism and a filtering mechanism, and after the experiment is finished, the mass of the screened substances is weighed and calculated.
In the experiment, when the screening out condition in the experimental process needs to be taken, the fourth three-way ball valve is adjusted to close the passage between the second collecting structure and the filtering mechanism, the stirring rotation speed in the emulsion charging basket is the same as that in the sample charging basket, after a period of time, the third three-way ball valve is continuously adjusted to block the passage between the first collecting structure and the first power structure, and the first discharge valve at the bottom of the emulsion charging basket is opened to take out the treated sample.
The above is a preferred embodiment of the present application, and is not intended to limit the scope of the present application in this way, therefore: equivalent changes in the mechanism, shape and principle of the present application should be covered in the protection scope of the present application.
Claims (8)
1. An emulsified asphalt stability detection device which is characterized in that:
Comprises a box body (3), a circulating system (1) and a control system (2) for controlling the circulating system (1),
The circulating system (1) and the control system (2) are both arranged in the box body (3),
The circulating system (1) comprises a processing mechanism (11), a power mechanism (12), a filtering mechanism (14) and a pipeline (15),
The processing mechanism (11), the power mechanism (12) and the filtering mechanism (14) are sequentially connected end to end through the pipeline (15) to form a closed passage,
The processing mechanism (11) comprises a sample barrel (111) and a sample stirring assembly (112) arranged in the sample barrel (111).
2. The emulsified asphalt stability detection apparatus as set forth in claim 1, wherein: the filtering mechanism (14) comprises a filtering tank (141), a first screen blocking strip (143) arranged on the inner wall of the filtering tank (141) and a first screen (142) movably arranged above the first screen blocking strip (143).
3. The emulsified asphalt stability detection apparatus as set forth in claim 1, wherein: a stop valve (8) is arranged on the pipeline (15) between the filtering mechanism (14) and the processing mechanism (11).
4. The emulsified asphalt stability detection apparatus as set forth in claim 1, wherein: the sample stirring assembly (112) comprises a bracket (1121) arranged at the upper end inside the sample barrel (111), a motor (1122) arranged at the center of the bracket (1121) and a stirring paddle (1123) arranged on the rotating shaft of the motor (1122) and vertically inserted into the sample barrel (111).
5. The emulsified asphalt stability detection apparatus as set forth in claim 1, wherein: the power mechanism (12) comprises a first power structure (121) and a second power structure (122) which are arranged in parallel, wherein the first power structure (121) comprises a first power pipe (1211) used for communicating the processing mechanism (11) and the filtering mechanism (14) and a gear pump (1212) arranged on the first power pipe (1211); the second power structure (122) comprises a second power pipe (1221) for communicating the processing mechanism (11) and the filtering mechanism (14) and a screw pump (1222) arranged on the second power pipe (1221).
6. The emulsified asphalt stability detection apparatus as set forth in claim 5, wherein: the circulating system (1) further comprises a collecting mechanism (13), the collecting mechanism (13) comprises a first collecting structure (131) and a second collecting structure (132) which are arranged in parallel, the first collecting structure (131) comprises a first collecting pipe (1311) used for communicating the power mechanism (12) and the filtering mechanism (14), an emulsion barrel (1312) arranged on the first collecting pipe (1311) and a first stirring assembly (1313) arranged in the emulsion barrel (1312), and the second collecting structure (132) comprises a second collecting pipe (1321) used for communicating the power mechanism (12) and the filtering mechanism (14), a mixing barrel (1322) arranged on the second collecting pipe (1321) and a second stirring assembly (1323) arranged in the mixing barrel (1322).
7. The emulsified asphalt stability detection apparatus as set forth in claim 6, wherein: the inner wall of the mixing barrel (1322) is provided with the second screen blocking strip (1325) and a second screen (1324) movably arranged above the second screen blocking strip (1325).
8. The emulsified asphalt stability detection apparatus as set forth in claim 6, wherein: the bottom of sample storage bucket (111) is provided with sample discharge valve (113), the bottom of emulsion storage bucket (1312) is provided with first discharge valve (1314), the bottom of mixing vat (1322) is provided with second discharge valve (1326).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322636685.6U CN220829528U (en) | 2023-09-27 | 2023-09-27 | Emulsified asphalt stability detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322636685.6U CN220829528U (en) | 2023-09-27 | 2023-09-27 | Emulsified asphalt stability detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220829528U true CN220829528U (en) | 2024-04-23 |
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ID=90723534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322636685.6U Active CN220829528U (en) | 2023-09-27 | 2023-09-27 | Emulsified asphalt stability detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220829528U (en) |
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2023
- 2023-09-27 CN CN202322636685.6U patent/CN220829528U/en active Active
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