CN216889540U - Deep sea winding and unwinding vehicle - Google Patents
Deep sea winding and unwinding vehicle Download PDFInfo
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- CN216889540U CN216889540U CN202123130620.1U CN202123130620U CN216889540U CN 216889540 U CN216889540 U CN 216889540U CN 202123130620 U CN202123130620 U CN 202123130620U CN 216889540 U CN216889540 U CN 216889540U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Abstract
The utility model discloses a deep sea winding and unwinding trolley, which comprises: the oil-filled motor comprises a motor shell, wherein a pressure balancing device is arranged on the motor shell; the worm and gear reducer is in transmission connection with the oil-filled motor and comprises an output shaft and a main shaft, and the main shaft is connected with the output shaft; the rope storage device comprises a rope storage base body, and an accommodating space is formed in the rope storage base body; the rope drum is arranged in the accommodating space and connected with the main shaft; rope arranging mechanism, including: the bidirectional screw rod is rotationally connected to the rope storage base body and is connected with the main shaft; the rope arranging component is internally provided with a shifting fork piece which is embedded in a spiral groove of the bidirectional screw rod, and a rope penetrating part is arranged on the rope arranging component; one end of the cable is wound on the rope drum, and the other end of the cable penetrates through the rope penetrating part; a depth detection element; and the controller is in communication connection with the depth detection element and the oil-filled motor. The utility model solves the problem that the deep sea winding and unwinding vehicle in the prior art cannot protect equipment.
Description
Technical Field
The utility model belongs to the technical field of a submarine floating platform, and particularly relates to an improvement of a deep sea winding and unwinding trolley structure.
Background
The underwater net car is an unattended electromechanical integrated device arranged on an underwater main floating body or a seabed platform, and a built-in motor drives to realize cable winding and unwinding so as to control the lifting of the communication buoy and the body thereof. The main function is to hide the communication buoy in water and avoid the communication buoy from being damaged by human, typhoon, sea wave and the like, and the communication buoy is lifted to the sea surface after information collection or measurement is completed. The main key of the current deep sea network is as follows: the hydraulic drive winding and unwinding trolley and the split motor drive winding and unwinding trolley do not have an independent self-locking braking protection module, and equipment is easily damaged when a rope is wound and unwound.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel deep sea winding and unwinding trolley, aiming at the problem that the deep sea winding and unwinding trolley in the prior art cannot protect equipment, wherein the novel deep sea winding and unwinding trolley is provided with a worm gear reducer, and the unfolding spiral angle of the worm gear reducer is smaller than the contact friction angle of the worm gear, so that the worm gear reducer can be self-locked, the automatic self-locking during the rope winding and unwinding operation is realized, and the protection of the whole equipment is further realized.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
a deep sea winding and unwinding trolley comprises:
the oil-filled motor comprises a motor shell, wherein a pressure balancing device used for balancing the pressure inside and outside the motor shell is arranged on the motor shell;
the worm and gear reducer is in transmission connection with the oil-filled motor and comprises an output shaft, and the unfolding spiral angle of the worm is smaller than the contact friction angle of the worm and gear;
the main shaft is connected with the output shaft and can rotate under the driving of the output shaft;
the rope storage device comprises a rope storage base body, and an accommodating space is formed in the rope storage base body;
the rope drum is arranged in the accommodating space, is connected with the main shaft and can rotate under the driving of the main shaft;
rope arranging mechanism, including:
the bidirectional screw rod is rotationally connected to the rope storage base body and is connected with the main shaft through a transmission device;
the rope arranging component is internally provided with a shifting fork piece which is embedded in a spiral groove of the bidirectional screw rod and can perform reciprocating linear movement under the driving of the bidirectional screw rod, and a rope penetrating part is arranged on the rope arranging component;
one end of the cable is wound on the rope drum, and the other end of the cable penetrates through the rope penetrating part;
a depth detection element for detecting a depth of water;
and the controller is in communication connection with the depth detection element and the oil-filled motor.
In some embodiments of the present application, the pressure balancing device comprises:
the balance cylinder body is fixed on the motor shell and communicated with the motor shell, and a communication port communicated with an external space is formed in the balance cylinder body;
the sliding piston is arranged in the balance cylinder body and is in sliding sealing connection with the inner wall of the balance cylinder body;
and one end of the elastic element is abutted against the sliding piston, and the other end of the elastic element is abutted against the wall of the balance cylinder opposite to the position of the sliding piston.
In some embodiments of the present application, a deep sea watertight connector is provided at an upper end of the oil-filled motor.
In some embodiments of the present application, the storage string base comprises:
2 mounting end covers are arranged and are oppositely arranged;
the pull rods are connected among the 2 mounting end covers, and are uniformly arranged along the circumferential direction of the mounting end covers;
the number of the mounting seats is 2, and the mounting seats are respectively arranged on the 2 mounting end covers;
the guide rail is connected between the 2 installation seats, a guide part is arranged on the rope arranging component, and the rope arranging component is arranged on the guide rail in a sliding mode through the guide part.
In some embodiments of the present application, a rope drum coupling cover on which the rope drum is fitted is formed with a cavity inside the rope drum, and the main shaft passes through the cavity and is fixedly coupled with the rope drum coupling cover.
In some embodiments of the present application, the transmission device includes a first transmission sprocket, a second transmission sprocket and a chain, the first transmission sprocket is connected to the main shaft, the chain is wound around the first transmission sprocket and the second transmission sprocket, and the second transmission sprocket is connected to one end of the bidirectional screw.
In some embodiments of the present application, the fixing device further includes a fixing frame, and the fixing frame is disposed on two sides of the mounting end cover and fixed on the mounting end cover through a bolt connection.
In some embodiments of the present application, the rope threading portion is a rope threading hole provided on the rope aligning member, and the guide portion is a guide hole provided on the rope aligning member.
Compared with the prior art, the utility model has the advantages and positive effects that:
the deep sea winding and unwinding vehicle provided by the utility model is provided with the oil charging motor as a driving device, the oil charging motor is connected with the worm and gear reducer during connection, the worm and gear reducer is correspondingly connected with the main shaft, the rope drum arranged on the main shaft and the rope arranging mechanism can be driven to act during rotation of the oil charging motor, so that the rope arranging mechanism can unwind or wind the rope from the rope drum, and the unfolding spiral angle of the worm corresponding to the worm and gear reducer is smaller than the contact friction angle of the worm and gear, so that the deep sea winding and unwinding vehicle can automatically self-lock during rope winding and unwinding operation, and further the protection of the whole equipment is realized.
Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of a deep sea winding and unwinding reel in an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the internal structure of the deep sea winding and unwinding trolley according to the embodiment of the utility model;
fig. 3 is a schematic structural diagram of an air pressure balancing device of the deep sea winding and unwinding reel in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The utility model provides an embodiment of a deep sea winding and unwinding trolley, which comprises: an oil-filled motor 110;
the oil-filled motor 110 comprises a motor casing, and special oil for balancing pressure is filled in the motor casing to meet the working requirement of the oil-filled motor in a deep sea environment.
In order to avoid the pressure resistance of each part when the oil-filled motor 110 works in deep sea, the embodiment further provides a pressure balancing device on the motor casing for balancing the internal and external pressures of the motor casing.
In some embodiments of the present application, the pressure balancing device comprises:
a balance cylinder 500 fixed to the motor casing and communicating with the motor casing, the balance cylinder 500 being provided with a communication port 510 communicating with an external space;
the sliding piston 700 is arranged in the balance cylinder 500 and is connected with the inner wall of the balance cylinder 500 in a sliding and sealing manner;
the elastic member 600 has one end abutting on the sliding piston 700 and one end abutting on the wall of the balancing cylinder 500 opposite to the sliding piston 700.
The both sides of balanced cylinder body 500 are equipped with flange limit, have seted up the connector on the motor casing, and balanced cylinder body 500 is installed in connector department and communicates each other with the motor casing is inside.
When the balance cylinder 500 is connected, the balance cylinder can be directly welded and fixed on a motor casing, special oil is filled in the motor casing, and part of the special oil can enter a horizontal cylinder communicated with the motor casing.
A sliding piston 700 and an elastic member 600 are disposed inside the balance cylinder 500, the elastic member 600 is a spring or a leaf spring, one end of which abuts against the sliding piston 700 and the other end of which abuts against a position of the balance cylinder 500 where the communication port 510 is disposed.
When oil charge motor 110 is put into the deep sea environment and is used, after reaching certain degree of depth, there is pressure differential in the inside and outside pressure of motor casing, at this moment, outside sea water can enter into balanced cylinder body 500 inside through intercommunication mouth 510, compression elastic component 600, and compression sliding piston 700, compress the inside special oil of motor casing through sliding piston 700 and give the inside pressurization of motor, and then increased the inside pressure of motor casing, thereby realize that the internal and external pressure of motor casing is balanced, guarantee the compressive capacity of every spare part.
Through adopting the pressure balancing device on the oil charge motor 110 and the motor casing, each part inside the oil charge motor 110 can be ensured to normally work under the deep sea environment, and the normal operation of the deep sea winding and unwinding trolley is ensured.
The worm gear reducer 120 is in transmission connection with the oil-filled motor 110 and comprises an output shaft, and the unfolding spiral angle of the worm is smaller than the contact friction angle of the worm gear;
the main shaft 130 is connected with the output shaft and can rotate under the driving of the output shaft;
the rope storage device comprises a rope storage base body 310, wherein an accommodating space is formed in the rope storage base body;
the rope drum 340 is arranged in the accommodating space, is connected with the main shaft 130 and can be driven by the main shaft 130 to rotate;
rope arranging mechanism, including:
the bidirectional screw 410 is rotatably connected to the rope storage base body 310 and is connected with the main shaft 130 through a transmission device;
the rope arranging part 420 is internally provided with a shifting fork piece which is embedded in a spiral groove of the bidirectional screw 410 and can perform reciprocating linear movement under the driving of the bidirectional screw, and the rope penetrating part 421 is arranged on the rope arranging part 420;
a cable having one end wound around the rope drum 340 and the other end passing through the rope passing portion 421;
a depth detection element for detecting a depth of water;
and the controller is in communication connection with the depth detection element and the oil-filled motor 110.
In some embodiments of the present application, the depth detection element is a depth detection sensor that can be used to detect a depth value of the seawater in the entire deep sea stowing and releasing vehicle.
In some embodiments of the present application, a deep sea seal insert 111 is further disposed at the upper end of the oil-filled motor 110, and the risk of short circuit and contact corrosion of the oil-filled motor can be reduced by the deep sea seal insert 111.
The deep sea sealing plug-in can be directly selected from the existing structure in the prior art, and the details are not repeated.
In some embodiments of the present application, the storage string base 310 includes:
the number of the mounting end covers 311 is 2, and the mounting end covers are arranged oppositely;
and the pull rods 312 are connected among the 2 mounting end covers 311, and the pull rods 312 are provided with a plurality of pull rods which are uniformly arranged along the circumferential direction of the end covers. The receiving space is formed between the 2 mounting end caps 311 and the plurality of tie rods 312.
The two ends of the pull rod 312 can be directly inserted and fixed on the mounting end cover 311.
The rope drum 340 is transversely arranged in the accommodating space, a cavity is formed inside the rope drum 340, and the main function of the rope drum 340 is to accommodate a retracted rope.
In some embodiments of the present application, the method further comprises:
the rope drum is connected with the cover 800, the rope drum 340 is assembled on the rope drum connection cover 800, and the main shaft 130 passes through the cavity and is fixedly connected with the rope drum connection cover 800.
The main shaft 130 is arranged in the center of the cavity of the rope drum 340 and is fixedly connected with the rope drum connecting covers 800 at two sides by adopting a key connection.
The two ends of the rope drum 340 and the rope drum connecting cover 800 are locked and fixed by bolts.
When the main shaft 130 rotates, the main shaft 130 drives the rope drum connecting cover 800 connected and fixed with the main shaft 130 and the rope drum 340 to synchronously rotate relative to the mounting end cover 311 for rope winding and unwinding.
The main shaft 130 also passes through the mounting end cover 311, and is rotatably connected with the mounting end cover 311.
The main shaft 130 and the mounting end cover 311 can be connected through a bearing to realize the rotation of the main shaft 130 relative to the mounting end cover 311.
Because rope reel 340 is located the installation space, and its outside has evenly arranged the connecting rod, consequently, can guarantee to rotate when receiving and releasing at rope reel 340, the connecting rod can play certain limiting displacement to the rope, prevents to rotate the winding and take place the circumstances that self knotted because of the rope when the winding, ensures that the rope can be by on the rope reel 340 is accomodate in order smoothly.
Rope arranging mechanism, including:
the bidirectional screw 410 is rotatably connected to the rope storage base body 310 and is connected with the main shaft 130 through a transmission device;
in some embodiments of the present application, the transmission device includes a first transmission sprocket 910, a second transmission sprocket 920 and a transmission chain 930, the first transmission sprocket 910 is connected to the main shaft 130, the chain 930 is wound around the first transmission sprocket 910 and the second transmission sprocket 920, and the second transmission sprocket 920 is connected to one end of the bidirectional screw 410.
The first transmission chain wheel 910 is arranged on the main shaft 130 and is fixedly connected with the main shaft 130 through a flat key;
the second driving chain wheel 920 is arranged at one end of the bidirectional screw 410 and is in driving connection with the bidirectional screw 410 through a flat key.
The rope arranging part 420 is internally provided with a shifting fork piece which is embedded in a spiral groove of the bidirectional lead screw 410 and can perform reciprocating linear movement under the driving of the bidirectional lead screw 410, and the rope penetrating part 421 is arranged on the rope arranging part 420;
the rope threading part 421 is a rope threading hole, and when the rope is connected, one end of the rope is wound on the rope drum 340, and the other end of the rope passes through the rope threading part 421 and is connected with the floating platform.
The storage rope base body 310 further comprises 2 mounting seats 320 which are respectively arranged on 2 mounting end covers 311.
Two ends of the bidirectional screw 410 are fixed on the mounting base 320 through a bearing with a base;
the bidirectional screw 410 has a continuous lead angle and a large spiral groove, which is right-handed in one direction and left-handed in the other direction; the rope arranging part 420 is provided with a crescent shifting fork, the shifting fork is sleeved on the bidirectional screw 410 and is embedded into the crescent shifting fork with the spiral groove to drive the whole rope arranging part 420 to do reciprocating axial motion along the bidirectional screw 410, and the rope arranging part 420 axially moves by a rope ring pitch every revolution of the rope drum 340.
In order to realize the guiding during the movement of the rope guiding component 420, in some embodiments of the present application, there are further provided: the guide rail 330 is connected between the 2 installation seats 320, a guide part 422 is arranged on the rope guiding part 420, and the guide part 422 is slidably arranged on the guide rail 330.
The guide portion 422 is a guide hole formed on the rope aligning member 420, and slides back and forth along the guide rail 330 through the guide hole when the rope aligning member 420 moves.
The guide rail 330 may be a guide bar.
The guide rod provides a constant direction for the axial movement of the rope arranging component 420, so that the reciprocating and orderly rope arrangement is completed in a round and accurate manner, and the rope passes through the back through the rope penetrating hole and is uniformly wound on the rope drum 340 of the winding machine.
The rope is made of mountain climbing rope with corrosion resistance, light weight and large bearing capacity.
The specific working process of the deep sea winding and unwinding trolley in the embodiment is as follows:
the winding machine is connected with the floating platform, when a rope is wound, a controller of the deep sea winding machine controls the oil filling motor 110 to rotate positively at a fixed rotating speed, the oil filling motor 110 drives the worm gear reducer 120 to rotate, an output shaft of the worm gear reducer 120 is connected with the main shaft 130 to drive the main shaft 130, the rope drum 340 connected to the main shaft 130 and the first transmission chain wheel 910 to rotate, the second transmission chain wheel 920 drives the bidirectional screw rod 410 to rotate to drive the rope arranging component 420 to do reciprocating motion, so that the rope winding process is realized, at the moment, the floating platform connected with the rope does sinking motion, the rope is automatically wound on the rope drum 340, and meanwhile, the worm gear reducer 120 is self-locked to enable the rope to stay at the position;
in the process of the floating platform falling, the controller collects a water depth signal acquired by the depth detection element in real time, when the floating platform is detected to sink to a set depth, the signal is transmitted to the controller, the controller controls the oil-filled motor 110 to stop rotating, the worm gear reducer 120 is self-locked, the ropes wound on the main shaft 130, the rope drum and the rope drum 340 are in a locked state, the self-locking effect that the submarine winding and unwinding trolley can pass through the worm gear reducer 120 when the ropes are wound and unwound is ensured, the ropes are locked at any position, and the protection on the submarine winding and unwinding trolley is realized.
The deep sea winding reel in the embodiment can enable the floating platform to lift at will within a certain water depth range through rope winding and unwinding operations, so that the floating platform can complete the designated functions in a certain underwater area.
The worm gear reducer 120 of the deep sea winding and unwinding machine in this embodiment can lock and fix the main shaft 130 when the rope winding and unwinding operation stops, so that the whole winding and unwinding machine cannot perform winding and unwinding operations any more, and the mechanical self-locking protection of the whole equipment is realized.
In some embodiments of the present application, the deep sea railway further comprises: the fixing frame is arranged on two sides of the mounting end cover 311 and fixed on the mounting end cover 311 through bolts, and a through hole is formed in the bottom end of the fixing frame.
When the bidirectional lead screw 410 works, the oil charge motor 110 acts to drive the worm gear reducer 120 connected with the oil charge motor to work, the output shaft 121 of the worm gear reducer 120 is connected with the spindle 130 through a coupler, the output shaft transmits power to the spindle 130 to drive the spindle 130 to rotate, the first transmission chain wheel 910 is driven to rotate, the first transmission chain wheel 910 transmits power to the second transmission chain wheel 920 through the chain 930, and then the bidirectional lead screw 410 is driven to rotate, and the bidirectional lead screw 410 can drive the rope arranging component 420 above the bidirectional lead screw to move back and forth in a reciprocating linear mode, so that ropes can be orderly wound on the rope drum 340 or distributed on the rope drum 340;
meanwhile, the rope drum 340 is driven by the main shaft 130 to rotate, and accordingly, the rope winding and unwinding operation is achieved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. The utility model provides a deep sea winding reel, its characterized in that, including:
the oil-filled motor comprises a motor shell, wherein a pressure balancing device used for balancing the pressure inside and outside the motor shell is arranged on the motor shell;
the worm and gear reducer is in transmission connection with the oil-filled motor and comprises an output shaft, and the unfolding spiral angle of the worm is smaller than the contact friction angle of the worm and gear;
the main shaft is connected with the output shaft and can rotate under the driving of the output shaft;
the rope storage device comprises a rope storage base body, and an accommodating space is formed in the rope storage base body;
the rope drum is arranged in the accommodating space, is connected with the main shaft and can be driven by the main shaft to rotate;
rope arranging mechanism, including:
the bidirectional screw rod is rotationally connected to the rope storage base body and is connected with the main shaft through a transmission device;
the rope arranging component is internally provided with a shifting fork piece which is embedded in a spiral groove of the bidirectional screw rod and can perform reciprocating linear movement under the driving of the bidirectional screw rod, and a rope penetrating part is arranged on the rope arranging component;
one end of the cable is wound on the rope drum, and the other end of the cable penetrates through the rope penetrating part;
a depth detection element for detecting a depth of water;
and the controller is in communication connection with the depth detection element and the oil-filled motor.
2. The deep sea winding reel according to claim 1,
the pressure balancing device comprises:
the balance cylinder body is fixed on the motor shell and communicated with the motor shell, and a communication port communicated with an external space is formed in the balance cylinder body;
the sliding piston is arranged in the balance cylinder body and is in sliding sealing connection with the inner wall of the balance cylinder body;
and one end of the elastic element is abutted against the sliding piston, and the other end of the elastic element is abutted against the wall of the balance cylinder opposite to the position of the sliding piston.
3. The deep sea winding and unwinding vehicle according to claim 1, wherein a deep sea watertight connector is provided at an upper end of the oil-filled motor.
4. The deep sea winding reel of claim 1, wherein the storage string base comprises:
2 mounting end covers are arranged oppositely;
the pull rods are connected among the 2 mounting end covers, and are uniformly arranged along the circumferential direction of the mounting end covers;
the number of the mounting seats is 2, and the mounting seats are respectively arranged on the 2 mounting end covers;
the guide rail is connected between the 2 installation seats, a guide part is arranged on the rope arranging component, and the rope arranging component is arranged on the guide rail in a slidable mode through the guide part.
5. The deep sea winding reel according to claim 1, wherein a rope reel connecting cover on which the rope reel is fitted is formed with a cavity inside the rope reel, and the main shaft passes through the cavity and is fixedly connected to the rope reel connecting cover.
6. The deep sea winding and unwinding vehicle according to claim 1, wherein the transmission device comprises a first transmission sprocket, a second transmission sprocket and a chain, the first transmission sprocket is connected with the main shaft, the chain is wound around the first transmission sprocket and the second transmission sprocket, and the second transmission sprocket is connected with one end of the bidirectional screw.
7. The deep sea winding reel according to claim 4, further comprising a fixing frame, wherein the fixing frame is arranged on two sides of the mounting end cover and fixed on the mounting end cover through bolts.
8. The deep sea winding reel according to claim 4, wherein the thread-threading part is a thread-threading hole provided on the rope-arranging member, and the guide part is a guide hole provided on the rope-arranging member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123130620.1U CN216889540U (en) | 2021-12-14 | 2021-12-14 | Deep sea winding and unwinding vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123130620.1U CN216889540U (en) | 2021-12-14 | 2021-12-14 | Deep sea winding and unwinding vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216889540U true CN216889540U (en) | 2022-07-05 |
Family
ID=82205000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123130620.1U Active CN216889540U (en) | 2021-12-14 | 2021-12-14 | Deep sea winding and unwinding vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216889540U (en) |
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2021
- 2021-12-14 CN CN202123130620.1U patent/CN216889540U/en active Active
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