CN213789211U - Blood purification measuring device - Google Patents
Blood purification measuring device Download PDFInfo
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- CN213789211U CN213789211U CN202022652266.8U CN202022652266U CN213789211U CN 213789211 U CN213789211 U CN 213789211U CN 202022652266 U CN202022652266 U CN 202022652266U CN 213789211 U CN213789211 U CN 213789211U
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- 239000008280 blood Substances 0.000 title claims abstract description 26
- 210000004369 blood Anatomy 0.000 title claims abstract description 26
- 238000000746 purification Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 98
- 239000002699 waste material Substances 0.000 claims abstract description 45
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims description 20
- 239000000385 dialysis solution Substances 0.000 claims description 6
- 238000006467 substitution reaction Methods 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 22
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 3
- 238000000502 dialysis Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Abstract
The utility model discloses a blood purification measuring device, include: the first measuring device is used for measuring the volume of the dialysate or the replacement fluid, the second measuring device is used for measuring the volume of the waste fluid, the first measuring device and the second measuring device can measure the volume of the solution in the moving process, a first liquid inlet of the first measuring device is communicated with a conveying device used for conveying the dialysate or the replacement fluid, a first liquid outlet of the first measuring device is communicated with a dialysate inlet of a dialyzer or a replacement fluid inlet of a blood path side pipeline, a second liquid inlet of the second measuring device is communicated with a waste fluid discharge port of the dialyzer, and a second liquid outlet of the second measuring device is communicated with a collecting device used for collecting the waste fluid. Through using the utility model provides a blood purification measuring device can guarantee the measurement accuracy of dislysate, replacement liquid and waste liquid under outdoor and the removal condition, and this device simple structure, convenient to use can use widely.
Description
Technical Field
The utility model relates to a blood purifies technical field, more specifically says, relates to a blood purifies measuring device.
Background
In the prior art, when blood purification CRRT treatment is performed, dialysate, replacement liquid and waste liquid are generally weighed through an electronic balance, so that the whole device is immovable in the treatment process, and if the device is moved, the measurement precision of treatment of a patient can be influenced, and the treatment effect of the patient is further influenced. And the use environment of the device can only be completed indoors, so that the treatment of patients has certain limitation.
In summary, how to ensure the measurement accuracy of the dialysate, the replacement fluid, and the waste fluid outdoors and under mobile conditions is a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a blood purification measuring device, which can ensure the measurement accuracy of the dialysate, the replacement fluid and the waste fluid under outdoor and mobile conditions, and the device has simple structure and convenient use, and can be popularized and used.
In order to achieve the above object, the present invention provides the following technical solutions:
a blood purification measurement device comprising: the device comprises a first measuring device and a second measuring device, wherein the first measuring device and the second measuring device can measure the volume of solution in the moving process, a first liquid inlet of the first measuring device is communicated with a conveying device used for conveying the dialysate or the replacement fluid, a first liquid outlet of the first measuring device is communicated with a dialysate inlet of a dialyzer or a replacement fluid inlet of a blood path side pipeline, a second liquid inlet of the second measuring device is communicated with a waste liquid outlet of the dialyzer, and a second liquid outlet of the second measuring device is communicated with a collecting device used for collecting the waste liquid.
Preferably, the measuring device further comprises a control valve device for controlling the flow of the solution in the first measuring device and the second measuring device, and the first measuring device and the second measuring device and the control valve device are of an integrated structure.
Preferably, the first measuring device comprises a first quantitative pot and a second quantitative pot, the end of the first quantitative pot is communicated with the first liquid inlet through a first communicating pipe and is communicated with the first liquid outlet through a second communicating pipe, the first communicating pipe is provided with a first control valve, and the second communicating pipe is provided with a second control valve;
the end part of the second quantitative kettle is communicated with the first liquid outlet through a third communicating pipe and is communicated with the first liquid inlet through a fourth communicating pipe, a third control valve is arranged on the third communicating pipe, and a fourth control valve is arranged on the fourth communicating pipe.
Preferably, the second measuring device comprises a third quantitative kettle and a fourth quantitative kettle, the end of the third quantitative kettle is communicated with the second liquid inlet through a fifth communicating pipe and is communicated with the second liquid outlet through a sixth communicating pipe, the fifth communicating pipe is provided with a fifth control valve, and the sixth communicating pipe is provided with a sixth control valve;
the end part of the fourth quantitative kettle is communicated with the second liquid outlet through a seventh communicating pipe and is communicated with the second liquid inlet through an eighth communicating pipe, a seventh control valve is arranged on the seventh communicating pipe, and an eighth control valve is arranged on the eighth communicating pipe.
Preferably, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, the seventh control valve, and the eighth control valve are all valve islands.
Preferably, the device further comprises a sensor for detecting the flow condition of the solution.
Use the utility model provides a during blood purification measuring device, can be through opening first inlet to in conveyor carries dialysate or replacement liquid to first measuring device, first measuring device can effectively detect the capacity of dialysate or replacement liquid, then opens first liquid outlet again, so that carry the dialysate after the accurate measurement to the dialysate entry of cerini dialyser cerini, or carry the replacement liquid after the accurate measurement to the human body in. In addition, can be through opening the second inlet to the waste liquid of the waste liquid discharge port of cerini dialyser cerini gets into second measuring device, and the capacity of waste liquid can effectively be detected to second measuring device, then opens the second outlet again, so that the waste liquid is effectively collected by collection device, in order to ensure going on smoothly of treatment. Moreover, the first measuring device and the second measuring device can accurately measure the volume of the solution in the moving process, so that the equipment can be ensured not to generate larger treatment errors in the moving state, and the measurement precision of the dialysate, the replacement liquid and the waste liquid can be improved.
To sum up, the utility model provides a blood purification measuring device, it can ensure the measurement accuracy of dislysate, replacement liquid and waste liquid under outdoor and the removal condition, and this device simple structure, convenient to use can use widely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a blood purification measuring device provided by the present invention;
FIG. 2 is a schematic diagram of the dialysate or replacement fluid side of the process;
FIG. 3 is a schematic of the waste side process flow.
In fig. 1-3:
1 is a first quantitative kettle, 11 is a first communicating pipe, 12 is a second communicating pipe, 13 is a first control valve, 14 is a second control valve, 2 is a second quantitative kettle, 21 is a third communicating pipe, 22 is a fourth communicating pipe, 23 is a third control valve, 24 is a fourth control valve, 3 is a third quantitative kettle, 31 is a fifth communicating pipe, 32 is a sixth communicating pipe, 33 is a fifth control valve, 34 is a sixth control valve, 4 is a fourth quantitative kettle, 41 is a seventh communicating pipe, 42 is an eighth communicating pipe, 43 is a seventh control valve, 44 is an eighth control valve, 5 is a first liquid inlet, 6 is a first liquid outlet, 7 is a second liquid inlet, 8 is a second liquid outlet, and 9 is a sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a blood purification measuring device, its measurement accuracy that can effectively improve dislysate, replacement liquid and waste liquid, and this device simple structure, convenient to use can use widely.
Please refer to fig. 1 to fig. 3, wherein fig. 1 is a schematic structural diagram of a blood purification and measurement device provided by the present invention; FIG. 2 is a schematic diagram of the dialysate or replacement fluid side of the process; FIG. 3 is a schematic of the waste side process flow.
This embodiment provides a blood purification measuring device, includes: the first measuring device is used for measuring the volume of the dialysate or the replacement fluid, the second measuring device is used for measuring the volume of the waste fluid, the first measuring device and the second measuring device can measure the volume of the solution in the moving process, a first liquid inlet 5 of the first measuring device is communicated with a conveying device used for conveying the dialysate or the replacement fluid, a first liquid outlet 6 of the first measuring device is communicated with a dialysate inlet of a dialyzer or a replacement fluid inlet of a blood path side pipeline, a second liquid inlet 7 of the second measuring device is communicated with a waste fluid discharge port of the dialyzer, and a second liquid outlet 8 of the second measuring device is communicated with a collecting device used for collecting the waste fluid.
It should be noted that, can set up first measuring device and second measuring device as quantitative kettle to in the accurate solution volume of measuring, and can guarantee that equipment can not produce great measuring error under the mobile state, also make this device can be in normal use in the environment of jolting, effectively guarantee that the measurement use amount of patient's treatment in-process dislysate, replacement liquid and waste liquid can not take place great error.
In the actual application process, the shape, the structure, the size, the material and the like of the first measuring device and the second measuring device can be determined according to the actual situation and the actual requirement.
Use the utility model provides a during blood purification measuring device, can be through opening first inlet 5 to in conveyor carries dialysate or replacement liquid to first measuring device, first measuring device can effectively detect the capacity of dialysate or replacement liquid, then opens first liquid outlet 6 again, in carrying the dialysate after the accurate measurement to the dialysate entry of cerini dialyser cerini, or carry the replacement liquid after the accurate measurement to the human body. In addition, the second liquid inlet 7 can be opened so that the waste liquid at the waste liquid outlet of the dialyzer can enter the second measuring device, the second measuring device can effectively detect the volume of the waste liquid, and then the second liquid outlet 8 is opened so that the waste liquid can be effectively collected by the collecting device, and the smooth proceeding of the treatment process is ensured. Moreover, the first measuring device and the second measuring device can accurately measure the volume of the solution in the moving process, so that the equipment can be ensured not to generate larger treatment errors in the moving state, and the measurement precision of the dialysate, the replacement liquid and the waste liquid can be improved.
To sum up, the utility model provides a blood purification measuring device, it can ensure the measurement accuracy of dislysate, replacement liquid and waste liquid under outdoor and the removal condition, and this device simple structure, convenient to use can use widely.
On the basis of the above embodiment, it is preferable that the measuring device further includes a control valve device for controlling the flow of the solution in the first measuring device and the second measuring device, and the first measuring device and the second measuring device are both integrated with the control valve device.
It should be noted that, when controlling the solution in the measuring device, a common design structure is to connect the pinch valve with the measuring device, and the pinch valve and the measuring device are designed separately, and a pipeline connection operation needs to be performed during the use process, which may cause the whole device to occupy a large amount of space, and a user may make mistakes very easily when assembling the pipeline. And this device sets up to integral type structure through setting up first measuring device, second measuring device and control valve device, can effectively simplify the pipeline assembly operation, reduces the overall structure and the consumptive material etc. of device.
The shape, structure, size, position and the like of the control valve device can be determined according to actual conditions and actual requirements in the actual application process.
Preferably, the first measuring device comprises a first quantitative pot 1 and a second quantitative pot 2, the end of the first quantitative pot 1 is communicated with the first liquid inlet 5 through a first communicating pipe 11 and is communicated with the first liquid outlet 6 through a second communicating pipe 12, the first communicating pipe 11 is provided with a first control valve 13, and the second communicating pipe 12 is provided with a second control valve 14; the end of the second quantitative kettle 2 is communicated with the first liquid outlet 6 through a third communicating pipe 21 and communicated with the first liquid inlet 5 through a fourth communicating pipe 22, the third communicating pipe 21 is provided with a third control valve 23, and the fourth communicating pipe 22 is provided with a fourth control valve 24.
In this embodiment, as shown in fig. 2, it is a working flow of the dialysate or replacement fluid side: when the replacement fluid or the dialysate enters the first fluid inlet 5, the first control valve 13 is opened, and the second control valve 14, the third control valve 23 and the fourth control valve 24 are closed, so that the replacement fluid or the dialysate can smoothly enter the first quantitative pot 1. When the first pitcher 1 is filled with the replacement fluid or the dialysate, the first control valve 13 and the third control valve 23 may be closed, the second control valve 14 and the fourth control valve 24 may be opened, so that the dialysate is discharged out of the first pitcher 1 through the second control valve 14 and flows into the dialysate inlet of the dialyzer, or the replacement fluid is discharged out of the first pitcher 1 through the second control valve 14 and flows into the human body, at the same time, a new replacement fluid or dialysate may be pushed into the second pitcher 2 through the fourth control valve 24, and the replacement fluid or the dialysate in the first pitcher 1 is emptied only after the second pitcher 2 is filled with the replacement fluid or the dialysate, and at the same time, by opening the first control valve 13 and the third control valve 23, the second control valve 14 and the fourth control valve 24 may be closed, so that the dialysate is discharged out of the second pitcher 2 through the third control valve 23 and flows into the dialysate inlet of the dialyzer, or the replacement fluid is discharged out of the second quantitative pot 2 through the third control valve 23 and flows into the human body, and simultaneously, new replacement fluid or dialysis fluid is pushed into the first quantitative pot 1 through the first control valve 13, and the replacement fluid or dialysis fluid can be effectively provided for the patient by repeating the above-mentioned circulation operation, so as to facilitate the corresponding dialysis treatment process.
In the actual application process, according to the actual situation and the actual requirement, the shapes, structures, sizes, positions, materials and the like of the first control valve 13, the second control valve 14, the third control valve 23, the fourth control valve 24, the first communicating pipe 11, the second communicating pipe 12, the third communicating pipe 21, the fourth communicating pipe 22, the first quantitative kettle 1 and the second quantitative kettle 2 can be determined.
Preferably, the second measuring device comprises a third quantitative pot 3 and a fourth quantitative pot 4, the end of the third quantitative pot 3 is communicated with the second liquid inlet 7 through a fifth communicating pipe 31 and communicated with the second liquid outlet 8 through a sixth communicating pipe 32, the fifth communicating pipe 31 is provided with a fifth control valve 33, and the sixth communicating pipe 32 is provided with a sixth control valve 34; the end of the fourth quantitative kettle 4 is connected to the second liquid outlet 8 through a seventh connection pipe 41 and connected to the second liquid inlet 7 through an eighth connection pipe 42, the seventh connection pipe 41 is provided with a seventh control valve 43, and the eighth connection pipe 42 is provided with an eighth control valve 44.
As shown in fig. 3, this is a waste liquid-side workflow: when the waste liquid enters the second liquid inlet 7, the fifth control valve 33 can be opened, and the sixth control valve 34, the seventh control valve 43 and the eighth control valve 44 can be closed, so that the waste liquid can smoothly enter the third quantitative kettle 3. When the third quantitative pot 3 is filled with the waste liquid, the fifth control valve 33 and the seventh control valve 43 may be closed, the sixth control valve 34 and the eighth control valve 44 may be opened, so that the waste liquid is discharged out of the third quantitative pot 3 through the sixth control valve 34 and flows into the waste liquid collecting device, and at the same time, new waste liquid can be pushed into the fourth quantitative pot 4 through the eighth control valve 44, and when the fourth quantitative kettle 4 is filled with waste liquid, the waste liquid in the third quantitative kettle 3 is emptied, and at the same time, the second control valve 33 and the seventh control valve 43 are opened, the sixth control valve 34 and the eighth control valve 44 are closed, so that the waste liquid is discharged out of the fourth quantitative pot 4 through the seventh control valve 43 and flows into the waste liquid collecting device, meanwhile, new waste liquid is pushed into the third quantitative kettle 3 through the fifth control valve 33, and the waste liquid can be effectively discharged for the patient by repeating the above circulation operation, so that the dialysis treatment process is ensured to be smoothly carried out.
In the actual operation process, according to the actual situation and the actual requirement, the shape, structure, size, position, material, etc. of the fifth control valve 33, the sixth control valve 34, the seventh control valve 43, the eighth control valve 44, the fifth communication pipe 31, the sixth communication pipe 32, the seventh communication pipe 41, the eighth communication pipe 42, the third quantitative pot 3, and the fourth quantitative pot 4 can be determined.
It should be noted that, the first control valve 13, the second control valve 14, the third control valve 23, the fourth control valve 24, the fifth control valve 33, the sixth control valve 34, the seventh control valve 43, and the eighth control valve 44 are integrated with the first quantitative pot 1, the second quantitative pot 2, the third quantitative pot 3, and the fourth quantitative pot 4, so that the installation process of the control valves can be omitted, the pipeline assembly operation can be effectively simplified, and the overall structure of the device and the consumption of consumable materials can be reduced.
In addition to the above embodiment, it is preferable that the first control valve 13, the second control valve 14, the third control valve 23, the fourth control valve 24, the fifth control valve 33, the sixth control valve 34, the seventh control valve 43, and the eighth control valve 44 are all valve islands.
It should be noted that, because this device needs 8 way control valves to control the liquid flow direction, if with control valve and ration kettle discrete assembly, can lead to the control valve to occupy very big equipment space, and can lead to pipeline installation operation very loaded down with trivial details, take place the pipeline installation error phenomenon easily. This device adopts control valve and quantitative kettle integral type design to set up each control valve into the valve island, utilize the valve island to replace solenoid valve control liquid way flow direction, consequently, this device not only can effectively reduce the whole volume of equipment, can also all carry out patient's treatment under motion state or quiescent condition.
In addition, the first control valve 13, the second control valve 14, the third control valve 23, the fourth control valve 24, the fifth control valve 33, the sixth control valve 34, the seventh control valve 43 and the eighth control valve 44 may be set as check valves to ensure that the flow processes of the various solutions do not affect each other.
Preferably, the device further comprises a sensor 9 for detecting the flowing condition of the solution, and the sensor 9 can be arranged on two sides of each communicating pipe so as to effectively detect the flowing condition of the solution in the communicating pipe. When the phenomenon that the solution in the communicating pipe is blocked to flow is detected, a user can perform adjustment operation in time to ensure the smooth flow of the replacement solution, the dialysis solution and the waste liquid, and the dialysis treatment process is favorably ensured to be carried out smoothly.
It should be noted that, in the present document, the first and second measuring devices, the first and second control valves 13 and 14, the third and fourth control valves 23 and 24, the fifth and sixth control valves 33 and 34, the seventh control valve 43, the eighth control valve 44, the first and second connection pipes 11 and 12, the third and fourth connection pipes 21 and 22, the fifth and sixth connection pipes 31 and 32, the seventh connection pipe 41, and the eighth connection pipe 42 are mentioned, the first and second quantitative kettles 1 and 2, the third quantitative kettles 3, the fourth quantitative kettles 4, the first and second liquid inlets 5 and 7, and the first and second liquid outlets 6 and 7, wherein, the first and second and third and fourth and fifth and sixth and seventh and eighth are mentioned only for distinguishing the position differences and are not sequentially mentioned.
It should be noted that the directions and positional relationships indicated by "in" and "out" in the present application are based on the directions and positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating the understanding, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed in a specific direction and operate, and therefore, should not be construed as limiting the present invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The utility model provides an arbitrary compound mode of all embodiments all is in this utility model's a protection scope, does not do here and gives unnecessary details.
The blood purification measuring device provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (6)
1. A blood purification measurement device, comprising: a first measuring device for measuring the volume of the dialysis fluid or the substitution fluid and a second measuring device for measuring the volume of the waste fluid, wherein the first measuring device and the second measuring device can both measure the volume of the solution during movement, the first liquid inlet (5) of the first measuring device is communicated with a conveying device for conveying the dialysis fluid or the substitution fluid, the first liquid outlet (6) of the first measuring device is communicated with a dialysis fluid inlet of a dialyzer or a substitution fluid inlet of a blood path side pipeline, the second liquid inlet (7) of the second measuring device is communicated with a waste fluid discharge port of the dialyzer, and the second liquid outlet (8) of the second measuring device is communicated with a collecting device for collecting the waste fluid.
2. The blood-purifying measuring apparatus of claim 1, further comprising a control valve means for controlling the flow of the solution in the first measuring means and the second measuring means, wherein the first measuring means and the second measuring means are each of an integral structure with the control valve means.
3. The blood purification measuring device according to claim 2, wherein the first measuring device comprises a first quantitative pot (1) and a second quantitative pot (2), the end of the first quantitative pot (1) is communicated with the first liquid inlet (5) through a first communicating pipe (11) and communicated with the first liquid outlet (6) through a second communicating pipe (12), a first control valve (13) is arranged on the first communicating pipe (11), and a second control valve (14) is arranged on the second communicating pipe (12);
the end part of the second quantitative kettle (2) is communicated with the first liquid outlet (6) through a third communicating pipe (21) and communicated with the first liquid inlet (5) through a fourth communicating pipe (22), a third control valve (23) is arranged on the third communicating pipe (21), and a fourth control valve (24) is arranged on the fourth communicating pipe (22).
4. The blood purification measuring device according to claim 3, wherein the second measuring device comprises a third quantitative pot (3) and a fourth quantitative pot (4), the end of the third quantitative pot (3) is communicated with the second liquid inlet (7) through a fifth communicating pipe (31) and is communicated with the second liquid outlet (8) through a sixth communicating pipe (32), a fifth control valve (33) is arranged on the fifth communicating pipe (31), and a sixth control valve (34) is arranged on the sixth communicating pipe (32);
the end part of the fourth quantitative kettle (4) is communicated with the second liquid outlet (8) through a seventh communicating pipe (41) and communicated with the second liquid inlet (7) through an eighth communicating pipe (42), a seventh control valve (43) is arranged on the seventh communicating pipe (41), and an eighth control valve (44) is arranged on the eighth communicating pipe (42).
5. The blood purification measuring device according to claim 4, wherein the first control valve (13), the second control valve (14), the third control valve (23), the fourth control valve (24), the fifth control valve (33), the sixth control valve (34), the seventh control valve (43), and the eighth control valve (44) are all valve islands.
6. A blood-purification measuring device according to any of claims 1 to 5, further comprising a sensor (9) for detecting a flow condition of the solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022652266.8U CN213789211U (en) | 2020-11-16 | 2020-11-16 | Blood purification measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022652266.8U CN213789211U (en) | 2020-11-16 | 2020-11-16 | Blood purification measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213789211U true CN213789211U (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022652266.8U Active CN213789211U (en) | 2020-11-16 | 2020-11-16 | Blood purification measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213789211U (en) |
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2020
- 2020-11-16 CN CN202022652266.8U patent/CN213789211U/en active Active
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