CN213463616U - Pressure device and pesticide preparation equipment - Google Patents
Pressure device and pesticide preparation equipment Download PDFInfo
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- CN213463616U CN213463616U CN202021925443.9U CN202021925443U CN213463616U CN 213463616 U CN213463616 U CN 213463616U CN 202021925443 U CN202021925443 U CN 202021925443U CN 213463616 U CN213463616 U CN 213463616U
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Abstract
The application provides a pressure device and pesticide preparation equipment. The pressure device comprises a closed container, a compressed air supply pipeline, a feeding pipeline, a discharging pipeline, a first control valve and an atomizing and conveying assembly. The closed container is provided with an accommodating cavity. The compression gas supply pipeline with hold the chamber intercommunication, the compression gas supply pipeline is used for carrying compressed gas to holding the intracavity. The feed pipeline is communicated with the containing cavity and used for conveying materials to the containing cavity. The discharge pipeline is communicated with the containing cavity and used for discharging pressurized materials. The first control valve is arranged on the discharge pipeline to control the conduction or the cut-off of the discharge pipeline. Because the material gets into and carries out pressurization again in the closed container, can set for the predetermined value of pressure in holding the intracavity as required, the material of buffer in the closed container is less when so moving, and when research and development product, the pilot scale sample is less, has solved research and development cost and has increased and thick liquids preparation consuming time problem in earlier stage.
Description
Technical Field
The utility model relates to a technical field of pesticide processing equipment especially relates to a pressure device and pesticide preparation equipment.
Background
The processing method of one pesticide preparation in the pesticide industry is pressure spray granulation, and the main process is as follows: grinding the pesticide active ingredients, the dispersing auxiliary agent and water into flowable slurry, conveying the slurry into a spray tower under the pressure of 0.6-2.0 MPa by a high-pressure pump, atomizing by a nozzle, and heating by hot air in the tower to instantly dry the slurry into particles. The corresponding pesticide preparation equipment mainly comprises a pressure conveying device and a drying system.
Traditional pressure delivery devices include high-pressure diaphragm pumps, surge tanks, and nozzles, and the material is conveyed to the high-pressure diaphragm pumps through the feed inlet. High-pressure diaphragm pump passes through buffer tank and nozzle intercommunication, there is a buffer tank between high-pressure diaphragm pump and the nozzle promptly, the material can carry out the buffer memory in the buffer tank, realize the steady voltage effect, because the volume of buffer tank is 10L, the material that needs about 5L keeps the liquid level, must continuous feed keep pressure constantly to provide before the high-pressure diaphragm pump, the material about 20L that consequently needs goes on, so traditional pressure conveying device just can move when starting up in the operation of needs thick liquids more than about 25L, and then make pressure conveying device need the thick liquids of more quantity just can go on. Like this, traditional pressure delivery device's operating condition for when developing the product, pilot scale sample is too much, has the research and development cost to increase and the consuming time problem of thick liquids preparation in earlier stage, unfavorable and product development.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects in the prior art and providing a pressure device and pesticide preparation equipment for solving the technical problems.
The purpose of the utility model is realized through the following technical scheme:
a pressure device, comprising:
the closed container is provided with an accommodating cavity;
the compressed gas supply pipeline is communicated with the accommodating cavity and is used for conveying compressed gas into the accommodating cavity;
the feeding pipeline is communicated with the accommodating cavity and is used for conveying materials into the accommodating cavity;
the discharge pipeline is communicated with the accommodating cavity and is used for discharging pressurized materials;
the first control valve is arranged on the discharge pipeline to control the conduction or the cut-off of the discharge pipeline;
the atomizing conveying assembly is communicated with the discharge pipeline and used for atomizing pressurized materials and conveying the atomized pressurized materials to a drying system.
In one embodiment, the pressure device further comprises a second control valve, and the second control valve is arranged on the compressed air supply pipeline to control the compressed air supply pipeline to be switched on or switched off.
In one embodiment, the pressure device further comprises a discharge conduit in communication with the discharge conduit.
In one embodiment, the pressure device further comprises a third control valve, and the third control valve is arranged on the discharge pipeline to control the on or off of the discharge pipeline.
In one embodiment, the pressure device further includes a pressure discharge pipe communicating with the accommodating chamber, the pressure discharge pipe being configured to discharge the air pressure in the accommodating chamber, and a safety valve provided in the pressure discharge pipe, the safety valve being configured to open when the pressure in the pressure discharge pipe reaches a predetermined value.
In one embodiment, the pressure device further comprises a monitoring pipeline and a pressure gauge, the monitoring pipeline is communicated with the accommodating cavity, and the pressure gauge is arranged on the monitoring pipeline to detect the pressure in the accommodating cavity.
In one embodiment, the pressure device further comprises an evacuation pipe, the evacuation pipe is communicated with the accommodating cavity, and the evacuation pipe is used for evacuating air in the accommodating cavity.
In one embodiment, the pressure device further comprises an evacuation valve, and the evacuation valve is arranged on the evacuation pipeline to control the evacuation pipeline to be switched on or switched off.
In one embodiment, the atomization delivery assembly comprises a delivery pipeline and a fourth control valve, the delivery pipeline is communicated with the discharge pipeline and is further used for being communicated with the drying system, and the fourth control valve is arranged on the delivery pipeline to control the delivery pipeline to be switched on or switched off.
A pesticide formulation apparatus comprising a drying system and a pressure device as in any of the above embodiments, the atomizing delivery assembly delivering pressurized material to the drying system.
Compared with the prior art, the utility model discloses at least, following advantage has:
1. because the compressed air supply pipeline, the feeding pipeline and the discharging pipeline are communicated with the containing cavity, compressed air and materials can be conveyed into the containing cavity, compressed air is filled into the containing cavity after the materials are placed in the closed container, the materials in the containing cavity are pressurized to obtain pressurized materials, and because the atomizing conveying assembly is communicated with the discharging pipeline, when the pressure in the containing cavity reaches a preset value, the first control valve is opened to control the conduction of the discharging pipeline, so that the pressurized materials are atomized by the atomizing conveying assembly and conveyed to the drying system for drying, and particles are processed;
2. because the material gets into and carries out pressurization again in the closed container, can set for the predetermined value of pressure in holding the intracavity as required, the material of buffer in the closed container is less when so moving, and when research and development product, the pilot scale sample is less, has solved research and development cost and has increased and thick liquids preparation consuming time problem in earlier stage.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of an apparatus for pesticide formulation in one embodiment;
fig. 2 is a schematic view of a pressure device of the pesticide formulation apparatus shown in fig. 1.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model relates to a pressure device includes closed container, compression air supply line, charge-in pipeline, row's material pipeline, first control valve and atomizing delivery unit. The closed container is provided with an accommodating cavity. The compression gas supply pipeline with hold the chamber intercommunication, the compression gas supply pipeline be used for carrying compressed gas extremely hold the intracavity. The feeding pipeline is communicated with the containing cavity and used for conveying materials into the containing cavity. The discharge pipeline is communicated with the containing cavity and used for discharging pressurized materials. The first control valve is arranged on the discharge pipeline to control the conduction or the cut-off of the discharge pipeline. The atomizing conveying assembly is communicated with the discharge pipeline and is used for atomizing pressurized materials and conveying the atomized pressurized materials to a drying system. The utility model also provides a pesticide preparation equipment, including drying system and any one of the above-mentioned embodiment pressure device, the atomizing conveyor components carry the pressurized material extremely drying system.
Please refer to fig. 1, which is a schematic diagram of a pesticide preparation apparatus 10 according to an embodiment of the present invention.
Referring also to fig. 2, the pesticide formulation apparatus 10 of an embodiment includes a drying system 100 and a pressure device 200. The pressure device 200 includes a containment vessel 210, a compressed gas supply conduit 220, a feed conduit 230, a discharge conduit 240, a first control valve 250, and an atomizing delivery assembly 260. The closed container 210 has an accommodating chamber 212. A compressed gas supply conduit 220 communicates with the receiving cavity 212, the compressed gas supply conduit 220 being for delivering compressed gas into the receiving cavity 212. The feed conduit 230 is in communication with the receiving cavity 212, and the feed conduit 230 is used to convey material into the receiving cavity 212. Discharge conduit 240 is in communication with receiving chamber 212, discharge conduit 240 being for discharging pressurized material. The first control valve 250 is disposed in the discharge pipe 240 to control the discharge pipe 240 to be turned on or off. Atomizing delivery assembly 260 is communicated with discharge conduit 240, and atomizing delivery assembly 260 is used for atomizing the pressurized material to the pressurized material after the conveying is atomized to drying system 100.
In the pesticide preparation equipment 10 and the pressure device 200, the compressed air supply pipeline 220, the feeding pipeline 230 and the discharging pipeline 240 are all communicated with the accommodating cavity 212, so that compressed air and materials can be conveyed into the accommodating cavity 212, when the materials are placed in the closed container 210, the accommodating cavity 212 is filled with the compressed air, so that the materials in the accommodating cavity 212 are pressurized to obtain pressurized materials, the power of the pressure device 200 is adjusted to be compressed air supply, and the atomizing conveying assembly 260 is communicated with the discharging pipeline 240, when the pressure in the accommodating cavity 212 reaches a preset value, the first control valve 250 is opened to control the conduction of the discharging pipeline 240, so that the pressurized materials are atomized by the atomizing conveying assembly 260 and conveyed to the drying system 100 for drying, and particles are processed. Because the material gets into closed container 210 and carries out pressurization again, can set for the predetermined value of pressure in holding chamber 212 as required, the material of buffering in closed container 210 is less when so moving, and when research and development product, the pilot scale sample is less, has solved research and development cost and has increased and thick liquids preparation consuming time problem in earlier stage.
In this embodiment, the compressed air supply duct 220 is directly connected to the outer wall of the hermetic container 210, so that the compressed air supply duct 220 communicates with the hermetic container 210. The feed pipe 230 is directly connected to the outer wall of the hermetic container 210 such that the feed pipe 230 communicates with the accommodating chamber 212. The discharge conduit 240 is directly connected to the outer wall of the hermetic container 210 such that the discharge conduit 240 communicates with the accommodating chamber 212. It is understood that in other embodiments, the compressed gas supply conduit 220 may not be limited to being directly connected to the outer wall of the containment vessel 210, and the compressed gas supply conduit 220 may also be indirectly connected to the outer wall of the containment vessel 210, i.e., the compressed gas supply conduit 220 may also be connected to the containment vessel 210 through other elements, such as a pipe, that connects the compressed gas supply conduit 220 to the containment vessel 210. Similarly, in other embodiments, feed conduit 230 may also be connected to containment vessel 210 via other elements, such as a pipe, that connects feed conduit 230 to containment vessel 210. Similarly, in other embodiments, discharge conduit 240 may also be connected to containment vessel 210 by other elements, such as a pipe.
As shown in fig. 2, in one embodiment, the pressure device 200 further includes a second control valve 270, and the second control valve 270 is disposed on the compressed air supply pipe 220 to control the compressed air supply pipe 220 to be turned on or off. Before the material is completely injected into the receiving chamber 212 through the feed pipe 230, the second control valve 270 is closed to control the shut-off of the compressed gas supply pipe 220; after the material is completely injected into the accommodating cavity 212 through the feeding pipeline 230, the second control valve 270 is opened to control the conduction of the compressed gas supply pipeline 220, so as to pressurize the accommodating cavity 212; when the pressure in the accommodating cavity 212 reaches a predetermined value, the first control valve 250 is opened, so that the pressurized material is discharged to the atomizing and conveying assembly 260 through the material discharge pipeline 240, the pressurized material is further atomized by the atomizing and conveying assembly 260, and the atomized pressurized material is conveyed to the drying system 100 for drying. When the discharge of the material in the closed vessel 210 is completed, the first control valve 250 and the second control valve 270 are closed. Thus, the next preparation is performed, and the above-described operation is repeated. The second control valve 270 is disposed on the compressed air supply pipeline 220, so that the on/off of the compressed air supply pipeline 220 can be flexibly controlled, and the preparation operation of the pesticide preparation device 10 is matched. It is understood that in the present embodiment, both the first control valve 250 and the second control valve 270 may be mechanical valves. Of course, in other embodiments, both first control valve 250 and second control valve 270 may also be solenoid valves.
As shown in fig. 2, in order to improve the convenience of maintaining the pressure device 200, in one embodiment, the pressure device 200 further includes a discharge pipe 280, the discharge pipe 280 is communicated with the discharge pipe 240, when the pressure device 200 operates for a certain time, the inside of the hermetic container 210 needs to be cleaned, and waste liquid can be discharged through the discharge pipe 280 during cleaning, so that the convenience of maintaining the pressure device 200 is improved. In this embodiment, the discharge pipe 280 is directly connected to the hermetic container 210. In other embodiments, the discharge pipe 280 may also be indirectly connected to the closed vessel 210.
As shown in fig. 2, in one embodiment, the pressure device 200 further includes a third control valve 290, and the third control valve 290 is disposed in the discharge pipe 280 to control the connection or disconnection of the discharge pipe 280, so that the connection or disconnection of the discharge pipe 280 is more flexibly controlled, and the convenience of the pressure device 200 is improved. Specifically, when the pressure device 200 is subjected to cleaning maintenance, the third control valve 290 is opened to conduct the drain pipe 280. When the pressure device 200 is operated, the third control valve 290 is closed to shut off the blow-off line 280. In this embodiment, the third control valve 290 may be a mechanical valve. Of course, in other embodiments, the third control valve 290 may also be a solenoid valve.
As shown in fig. 2, to improve the speed and convenience of putting the material into the feeding pipeline, the pressure device 200 further includes a feeding hopper 206, which is communicated with the feeding pipeline and can rapidly add the material into the feeding pipeline through the feeding hopper. In this embodiment, go into the hopper and keep away from the end connection of airtight container with charge-in pipeline, and go into the hopper and be the circular cone column structure, and the radius of going into the opening part of hopper is greater than the internal diameter of blowing pipeline, is favorable to adding charge-in pipeline through the material fast.
As shown in fig. 2, to improve the speed and convenience of the material put into the feeding pipe, the pressure device 200 further includes a fourth control valve 208 disposed on the feeding pipe to control the on/off of the feeding pipe. When the materials are added into the closed container, the fourth control valve is opened. When the materials are added into the closed container completely, the fourth control valve is closed, the materials in the feeding hopper 206 do not completely enter the accommodating cavity through the feeding pipeline at the moment, feeding and pressurizing of the next batch are waited, and the speed and the convenience of putting the materials into the feeding pipeline are improved.
As shown in fig. 2, the pressure device 200 further includes a pressure discharge pipe 310 and a relief valve 320, the pressure discharge pipe 310 is communicated with the accommodating chamber 212, and the pressure discharge pipe 310 is used for discharging the air pressure in the accommodating chamber 212. The safety valve 320 is arranged on the pressure discharge pipeline 310, and the safety valve 320 is used for being opened when the pressure of the pressure discharge pipeline 310 reaches a preset value, so that the excessive air pressure in the accommodating cavity 212 is avoided, and the use safety of the pressure device 200 is improved. In the present embodiment, the relief valve 320 is a pressure regulating valve. The pressure discharge pipe 310 is directly connected to the hermetic container 210 such that the pressure discharge pipe 310 communicates with the accommodating chamber 212. In other embodiments, the pressure discharge pipe 310 may be indirectly connected to the hermetic container 210, such that the pressure discharge pipe 310 is communicated with the accommodating cavity 212.
As shown in fig. 2, further, the pressure device 200 further includes a monitoring pipe 330 and a pressure gauge 340, the monitoring pipe 330 is communicated with the accommodating cavity 212, and the pressure gauge 340 is disposed on the monitoring pipe 330 to detect the pressure in the accommodating cavity 212, so that a user can visually know the pressure in the accommodating cavity 212, and the convenience and safety of the pressure device 200 are improved. In this embodiment, the monitoring pipe 330 is directly connected to the hermetic container 210, so that the monitoring pipe 330 communicates with the accommodating chamber 212. In other embodiments, monitoring conduit 330 may also be indirectly connected to containment vessel 210, such that monitoring conduit 330 is in communication with containment chamber 212.
As shown in fig. 2, in one embodiment, the pressure device 200 further includes an evacuation pipe 350, the evacuation pipe 350 is communicated with the accommodating cavity 212, and the evacuation pipe 350 is used for evacuating air in the accommodating cavity 212, so as to prevent air in the accommodating cavity 212 from affecting the pressurization of the material, thereby improving the reliability of the pressure device 200. In this embodiment, the evacuation pipe 350 is directly connected to the hermetic container 210, so that the evacuation pipe 350 communicates with the accommodating chamber 212. In other embodiments, the evacuation conduit 350 may also be indirectly connected to the containment vessel 210 such that the evacuation conduit 350 is in communication with the receiving cavity 212.
As shown in fig. 2, in one embodiment, the pressure device 200 further includes an evacuation valve 360, and the evacuation valve 360 is disposed on the evacuation pipe 350 to control the opening and closing of the evacuation pipe 350. Before the compressed gas is delivered to the accommodating cavity 212, the emptying valve 360 is opened to enable the emptying pipeline 350 to be communicated so as to discharge the air in the accommodating cavity 212; when the compressed gas is supplied to the accommodating cavity 212, the evacuation valve 360 is closed to stop the evacuation pipe 350, thereby improving the convenience of the pressure device 200. In this embodiment, the evacuation valve 360 may be a mechanical valve. Of course, in other embodiments, the evacuation valve 360 may also be a solenoid valve.
As shown in fig. 2, in one embodiment, the atomizing delivery assembly 260 includes a delivery conduit 262 and a fourth control valve 264, the delivery conduit 262 is in communication with the discharge conduit 240, the delivery conduit 262 is also used for communicating with the drying system 100, and the fourth control valve 264 is disposed on the delivery conduit 262 to control the delivery conduit 262 to be turned on or off. When the closed container 210 is cleaned, maintained or pressurized, the fourth control valve 264 is closed to prevent the waste liquid or the material before pressurization in the accommodating chamber 212 from entering the drying system 100 through the conveying pipe 262. When the pressure device 200 is operating normally, the fourth control valve 264 is opened to inject the pressurized material into the drying system 100 through the delivery pipe 262 for atomization. In this embodiment, the fourth control valve 264 may be a mechanical valve. Of course, in other embodiments, the fourth control valve 264 may also be a solenoid valve. The delivery conduit 262 is directly connected to the discharge conduit 240 such that the delivery conduit 262 is in communication with the discharge conduit 240. Of course, in other embodiments, delivery conduit 262 is indirectly connected to discharge conduit 240 such that delivery conduit 262 is in communication with discharge conduit 240.
As shown in fig. 2, the drying system 100 further includes a drying tower 110 and a spray head 120, wherein the inner cavity of the drying tower 110 is communicated with the conveying pipe 262 through the spray head 120, so that the material is sprayed into the drying tower 110 through the spray head 120, thereby realizing the drying operation of the material. In this embodiment, the spray outlet of spray head 120 is located within drying tower 110 and communicates with the interior cavity of drying tower 110.
Compared with the prior art, the utility model discloses at least, following advantage has:
1. because the compressed air supply pipeline 220, the feeding pipeline 230 and the discharging pipeline 240 are all communicated with the accommodating cavity 212, compressed air and materials can be conveyed into the accommodating cavity 212, after the materials are placed in the closed container 210, compressed air is filled into the accommodating cavity 212, the materials in the accommodating cavity 212 are pressurized to obtain pressurized materials, and because the atomizing conveying assembly 260 is communicated with the discharging pipeline 240, when the pressure in the accommodating cavity 212 reaches a preset value, the first control valve 250 is opened to control the conduction of the discharging pipeline 240, so that the pressurized materials are atomized by the atomizing conveying assembly 260 and conveyed to the drying system 100 for drying, and particles are processed;
2. because the material gets into closed container 210 and carries out pressurization again, can set for the predetermined value of pressure in holding chamber 212 as required, the material of buffering in closed container 210 is less when so moving, and when research and development product, the pilot scale sample is less, has solved research and development cost and has increased and thick liquids preparation consuming time problem in earlier stage.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A pressure device, comprising:
the closed container is provided with an accommodating cavity;
the compressed gas supply pipeline is communicated with the accommodating cavity and is used for conveying compressed gas into the accommodating cavity;
the feeding pipeline is communicated with the accommodating cavity and is used for conveying materials into the accommodating cavity;
the discharge pipeline is communicated with the accommodating cavity and is used for discharging pressurized materials;
the first control valve is arranged on the discharge pipeline to control the conduction or the cut-off of the discharge pipeline;
the atomizing conveying assembly is communicated with the discharge pipeline and used for atomizing pressurized materials and conveying the atomized pressurized materials to a drying system.
2. The pressure device of claim 1, further comprising a second control valve disposed in the compressed air supply conduit for controlling the compressed air supply conduit to be turned on or off.
3. The pressure device of claim 1, further comprising a discharge conduit in communication with the discharge conduit.
4. The pressure device according to claim 3, further comprising a third control valve provided in the discharge pipe to control the conduction or the cutoff of the discharge pipe.
5. The pressure device according to claim 1, further comprising a pressure discharge pipe communicating with the accommodating chamber and discharging the air pressure in the accommodating chamber, and a safety valve provided in the pressure discharge pipe and opening when the pressure in the pressure discharge pipe reaches a predetermined value.
6. The pressure device according to claim 5, further comprising a monitoring conduit in communication with the receiving chamber and a pressure gauge disposed in the monitoring conduit for detecting the pressure in the receiving chamber.
7. The pressure device of claim 1, further comprising an evacuation conduit in communication with the receiving cavity, the evacuation conduit for evacuating air within the receiving cavity.
8. The pressure device of claim 7, further comprising an evacuation valve disposed on the evacuation conduit to control the evacuation conduit to open or close.
9. The pressure device according to any one of claims 1 to 8, wherein the atomizing delivery assembly comprises a delivery conduit and a fourth control valve, the delivery conduit is communicated with the discharge conduit, the delivery conduit is further used for being communicated with the drying system, and the fourth control valve is arranged on the delivery conduit to control the delivery conduit to be switched on or switched off.
10. A pesticide formulation apparatus comprising a drying system and a pressure device as claimed in any one of claims 1 to 9, the atomizing delivery assembly delivering pressurised material to the drying system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021925443.9U CN213463616U (en) | 2020-09-05 | 2020-09-05 | Pressure device and pesticide preparation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021925443.9U CN213463616U (en) | 2020-09-05 | 2020-09-05 | Pressure device and pesticide preparation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213463616U true CN213463616U (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021925443.9U Active CN213463616U (en) | 2020-09-05 | 2020-09-05 | Pressure device and pesticide preparation equipment |
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| Country | Link |
|---|---|
| CN (1) | CN213463616U (en) |
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- 2020-09-05 CN CN202021925443.9U patent/CN213463616U/en active Active
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