CN113984147B - Convenient non-contact mud layer interface appearance that removes - Google Patents
Convenient non-contact mud layer interface appearance that removes Download PDFInfo
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- CN113984147B CN113984147B CN202111248283.8A CN202111248283A CN113984147B CN 113984147 B CN113984147 B CN 113984147B CN 202111248283 A CN202111248283 A CN 202111248283A CN 113984147 B CN113984147 B CN 113984147B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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Abstract
The invention discloses a non-contact mud layer interface instrument convenient to move, which comprises a support, wherein universal wheels are fixedly arranged at four corners of the lower end of the support, an interface instrument body is fixedly arranged at the left end of the support, a screw rod is arranged at the lower end of the interface instrument body, a wire is wound on the screw rod, a detection head is fixedly arranged at the lower end of the wire, a sleeve is fixedly arranged at the right end of the detection head, a fixing rod is inserted at the right end of the sleeve, and the right end of the fixing rod is fixedly arranged on the support. When the positioning device is used, the positioning rod is pulled upwards to slide out of the positioning groove, the sleeve is pushed to move leftwards on the fixing rod, the sleeve drives the detection head to move leftwards, the position of the detection head is conveniently adjusted according to different radiuses of the container, the detection head reaches the position required to be detected, the application range is wide, after the adjustment is finished, the positioning rod is loosened, the positioning rod is rebounded under the action of the spring IV, the positioning rod is inserted into the corresponding positioning groove, and the sleeve is limited.
Description
Technical Field
The invention relates to the technical field of detection equipment, in particular to a non-contact mud layer interface instrument convenient to move.
Background
The sludge interface instrument detects the distance between the sensor probe and the sludge interface and the distance between the sensor probe and the bottom surface by utilizing a reliable ultrasonic echo detection principle, realizes the real-time monitoring of the thickness change of the sludge of 0-30 m and the control of related technological processes, optimizes the sludge discharge control and the dosing control, prevents the water from deteriorating, avoids the denitrification and the decomposition of the sludge, and optimizes the technological control flow.
When the existing non-contact mud layer interface instrument is used, because the radius of the detected mud surface containers is different, when a container with a larger radius is encountered, the detection head of the non-contact mud layer interface instrument cannot extend to the upper side of the mud surface to be detected, a worker is required to hold the extension rod to fix the detection head on the extension rod for detection, the detection mode not only easily enables a longer connecting wire between the detection head and the non-contact mud layer interface instrument to fall onto the mud surface and influences the detection precision, but also easily enables the surface of the connecting wire to be stained with muddy water and pollutes the connecting wire, and in addition, the manual holding of the extension rod also easily causes shaking of the detection head and influences the normal detection quality.
Disclosure of Invention
The invention aims to solve the problems that when the existing non-contact mud layer interface instrument in the prior art is used, because the radius of a detected mud surface container is different, when a container with a larger radius is encountered, a detection head of the non-contact mud layer interface instrument cannot extend to the upper side of a mud surface to be detected, a worker is required to hold an extension rod to fix the detection head on the extension rod for detection, the detection mode is easy to lead a longer connecting wire between the detection head and the non-contact mud layer interface instrument to fall off to the mud surface, the detection precision is affected, the surface of the connecting wire is easy to be stained with mud water, the connecting wire is polluted, and in addition, the detection head is easy to shake caused by manual holding of the extension rod, and the normal detection quality is affected.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a convenient non-contact mud layer interface appearance that removes, includes the support, equal fixed mounting in support lower extreme four corners department has the universal wheel, and support left end fixed mounting has the interface appearance body, interface appearance body lower extreme is equipped with the hob, and twines on the hob, and wire lower extreme fixed mounting has the detection head, and detection head right-hand member fixed mounting has the sleeve, and sleeve right-hand member cartridge has the dead lever, and dead lever right-hand member fixed mounting is on the support, sleeve upper end right side runs through there is the dead lever, and the cover is equipped with the spring four on the dead lever, and the both ends are fixed connection dead lever and sleeve respectively about the spring four, a plurality of constant head tanks have all been seted up to the dead lever upper end correspondence dead lever, and the dead lever cartridge is equidistant distribution between the dead lever, the rack front end left side meshing has drive gear, and drive gear upper end fixed mounting has the carousel, carousel upper end fixed mounting on the hob, the hob left side is equipped with the wire ball seat, and the wire runs through on the right side of wire seat, be equipped with the ball seat, and the ball seat is equipped with the ball seat, and the ball seat is equipped with the ball seat, and is kept away from to the ball seat.
Preferably, the lower end of the interface instrument body is provided with a rotary groove corresponding to the screw rod, and the screw rod is rotationally connected with the interface instrument body.
Preferably, the second conductive block is fixedly installed in the lower end of the interface instrument body, the first conductive block is fixedly installed at the upper end of the screw rod corresponding to the second conductive block, the first conductive block is mutually attached to the second conductive block, and the upper end of the lead is fixedly connected with the first conductive block.
Preferably, the whole line board is connected with a screw in a threaded manner, the upper end of the screw is rotationally connected with the interface instrument body, a fixed gear is fixedly arranged at the lower end of the screw, a gear ring is fixedly arranged at the upper end of the turntable, the fixed gear is meshed with the gear ring, and the screw is rotationally connected with the turntable.
Preferably, a guide rod is connected to the left side of the whole wire plate in a penetrating and sliding manner, and the upper end of the guide rod is fixedly connected with the interface instrument body.
Preferably, a plurality of telescopic rods are fixedly arranged at one ends, far away from the wires, of the ball seats, and the other ends of the telescopic rods are fixedly arranged in the wire arranging plate.
Preferably, the telescopic rod is sleeved with a second spring, one end, close to each other, of the second spring is fixedly connected with the ball seat, and one end, far away from each other, of the second spring is fixedly connected with the whole wire plate.
Preferably, the left end of the anti-loosening plate is fixedly provided with a spring III, the left end of the spring III is fixedly provided with a vertical plate, and the lower end of the vertical plate is fixedly connected with the line-arranging plate.
Compared with the prior art, the invention has the beneficial effects that:
1. when the positioning device is used, the positioning rod is pulled upwards to slide out of the positioning groove, the sleeve is pushed to move leftwards on the fixing rod, the sleeve drives the detection head to move leftwards, the position of the detection head is conveniently adjusted according to different radiuses of the container, the detection head reaches the position required to be detected, the application range is wide, after the adjustment is finished, the positioning rod is loosened, the positioning rod is rebounded under the action of the spring IV, the positioning rod is inserted into the corresponding positioning groove, and the sleeve is limited.
2. When the device is used, the spiral rod rotates to automatically loosen the wire wound on the surface of the spiral rod, so that the length of the wire can be adjusted in a self-adaptive manner according to the extension of the detection head, the condition that the wire falls into a mud layer during the detection of a mud layer interface can not be caused due to overlong wire, the normal detection of the mud layer interface is ensured, and the wire can not fall into the mud layer to pollute the surface of the wire.
3. When the wire arranging device is used, the screw drives the wire arranging plate to ascend, and the arranged wire arranging plate is convenient to carry out self-adaptive adjustment according to the wire arranging position of the screw rod, so that when a wire is separated from a spiral groove on the screw rod, the wire arranging plate can be kept on the same horizontal line with the spiral groove when the wire is separated, uniform wire arranging of the wire is realized, and disorder during wire arranging of the wire is avoided.
4. When the wire paying-off device is used, the anti-loosening plate plays a role in preventing loosening by extrusion on a wire which is not paying off on the upper side of the spiral rod under the action of the spring III, so that the wire is prevented from falling off in the paying-off process.
5. When the wire is used, the wire is contacted with the ball when passing through the wire arranging plate, and the ball is driven to rotate in the ball seat, so that the friction force of the wire directly rubbing against the inner wall of the wire arranging plate is reduced, a certain auxiliary effect is achieved on paying off of the wire, and the pressure between the balls is adjusted in a self-adaptive mode when the wire passes through the wire arranging plate by the arranged telescopic rod and the spring II.
6. When the wire winding device is used, when the detection is finished, the positioning rod is pulled upwards to push the sleeve to move rightwards to drive the detection head to reset rightwards, meanwhile, the rack drives the transmission gear to rotate reversely, so that the turntable and the spiral rod are driven to rotate reversely, the fixed gear and the gear ring drive the screw to rotate reversely, the whole wire plate is enabled to descend continuously, the wire can be wound on the spiral rod uniformly, automatic wire winding and unwinding during detection is achieved, and the wire winding device is simple to operate and convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of a non-contact mud layer interface instrument which is convenient to move and provided by the invention;
FIG. 2 is a schematic diagram of the structure of the position A in the non-contact mud layer interface instrument which is convenient to move;
FIG. 3 is a schematic diagram of a structure of a non-contact mud layer interface instrument B which is convenient to move;
FIG. 4 is a schematic diagram of a structure at C in a non-contact mud layer interface instrument which is convenient to move;
FIG. 5 is a schematic cross-sectional view of a connection between a wire-guide plate and a wire in a non-contact mud layer interface instrument with convenient movement according to the present invention;
fig. 6 is a schematic top view of a fixing rod in a non-contact mud layer interface instrument with convenient movement according to the present invention.
In the figure: 1. a bracket; 2. a universal wheel; 3. an interface instrument body; 4. a screw rod; 5. a rotary groove; 6. a wire; 7. a first conductive block; 701. a second conductive block; 8. a detection head; 9. a sleeve; 10. a fixed rod; 11. a positioning rod; 12. a positioning groove; 13. a rack; 14. a transmission gear; 15. a turntable; 16. a wire finishing plate; 17. a screw; 18. a fixed gear; 181. a gear ring; 19. a guide rod; 20. a ball; 21. a ball seat; 22. a telescopic rod; 23. a second spring; 24. an anti-loosening plate; 25. a third spring; 26. a riser; 27. and a spring IV.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-6, a convenient-to-move non-contact mud layer interface instrument comprises a support 1, universal wheels 2 are fixedly arranged at four corners of the lower end of the support 1, an interface instrument body 3 is fixedly arranged at the left end of the support 1, a spiral rod 4 is arranged at the lower end of the interface instrument body 3, a wire 6 is wound on the spiral rod 4, a rotating groove 5 is formed in the lower end of the interface instrument body 3 corresponding to the spiral rod 4, the spiral rod 4 is rotationally connected with the interface instrument body 3, a conductive block two 701 is fixedly arranged in the lower end of the interface instrument body 3, a conductive block one 7 is fixedly arranged at the upper end of the spiral rod 4 corresponding to the conductive block two 701, the conductive block one 7 is mutually attached to the conductive block two 701, the upper end of the wire 6 is fixedly connected with the conductive block one 7, a detection head 8 is fixedly arranged at the lower end of the wire 6, a sleeve 9 is fixedly arranged at the right end of the detection head 8, a fixing rod 10 is inserted at the right end of the sleeve 9, a positioning rod 11 penetrates through the right side of the upper end of the sleeve 9, four springs 27 are sleeved on the positioning rod 11, the upper ends of the four springs 27 are respectively connected with the upper ends of the positioning rod 11 and the sleeve 11 and are respectively fixedly arranged at the two ends of the positioning grooves 12 and are distributed between the positioning rods 11 and the positioning grooves 11 are uniformly distributed at the same distance;
when the positioning rod 11 is pulled upwards to slide out from the positioning groove 12, the sleeve 9 is pushed to move leftwards on the fixing rod 10, the sleeve 9 drives the detection head 8 to move leftwards, so that the position of the detection head 8 is convenient to adjust according to different radius sizes of a container, the detection head 8 reaches the position required to be detected, the application range is wide, after the adjustment is finished, the positioning rod 11 is loosened, the positioning rod is rebounded under the action of the spring four 27, and the sleeve 9 is inserted into the corresponding positioning groove 12 to limit the sleeve 9.
Example two
Referring to fig. 1-6, in this embodiment, basically the same as the first embodiment, more preferably, a rack 13 is fixedly mounted at the upper end of the sleeve 9, a transmission gear 14 is meshed with the left side of the front end of the rack 13, a turntable 15 is fixedly mounted at the upper end of the transmission gear 14, the upper end of the turntable 15 is fixedly mounted on a screw rod 4, a wire arranging plate 16 is arranged at the left lower side of the screw rod 4, and the wire 6 penetrates through the right side of the wire arranging plate 16, a screw rod 17 is connected to the wire arranging plate 16 in a threaded manner, the upper end of the screw rod 17 is rotationally connected with the interface instrument body 3, a fixed gear 18 is fixedly mounted at the lower end of the screw rod 17, a gear ring 181 is fixedly mounted at the upper end of the turntable 15, the fixed gear 18 is meshed with the gear ring 181, the screw rod 17 is rotationally connected with the turntable 15, the left side of the wire arranging plate 16 is penetrated and slidably connected with a guide rod 19, the upper end of the guide rod 19 is fixedly connected with the interface instrument body 3, a plurality of balls 20 are arranged on the outer side of the wire 6 in the wire arranging plate 16, a ball seat 21 is inserted into one end, far away from the wire 6, of each ball 20, the ball seat 21 is rotationally connected with the corresponding ball seat 21, the surface of the wire 6 is attached to the ball 20, a plurality of telescopic rods 22 are fixedly arranged at one ends, far away from the wire 6, of the ball seats 21, the other ends of the telescopic rods 22 are fixedly arranged in the wire arranging plate 16, a second spring 23 is sleeved on the telescopic rods 22, one ends, close to each other, of the second springs 23 are fixedly connected with the ball seat 21, and one ends, far away from each other, of the second springs 23 are fixedly connected with the wire arranging plate 16;
during the use, sleeve 9 also can drive rack 13 when sliding left, rack 13 drives drive gear 14 and rotates, drive gear 14 drives carousel 15 and rotates, carousel 15 drives hob 4 and rotates, hob 4 rotates and can loosen wire 6 of winding on hob 4 surface automatically, thereby be convenient for according to the extension of detecting head 8, the length of wire 6 can not be adjusted by wire 6 overlength in the self-adaptation, lead to the condition that wire 6 falls into the mud layer when detecting mud layer interface, thereby guaranteed to the normal detection of mud layer interface, also can not make wire 6 fall into the mud layer, cause the pollution on wire 6 surface, conducting block one 7 and conducting block two 701 of setting, make hob 4 when rotating the unwrapping wire, guaranteed the normal circular telegram work of wire 6, when carousel 15 rotates, also can drive the ring gear 181 rotation, the ring gear 181 drives fixed gear 18 and rotates, fixed gear 18 drives screw 17 and rises, the wire rounding plate 16 of setting is convenient for carrying out the self-adaptation according to the unwrapping wire position of hob 4, thereby make wire 6 break away from the wire 16 when keeping out from helical wire 16 on the helical plate 16 and keeping the same wire 16 at the time of leading wire 16, thereby the wire setting up and the wire level is even when keeping down at wire 16, and the wire setting up and the wire rounding ball is kept at the same in the wire winding reel 16, and the wire setting-winding reel is kept at the wire winding reel is 16, and the wire reel is kept at the level when setting up, and is kept at the wire reel is adjusted at the wire reel is 20, and is used, and is self-adjusting, and is used, when the wire is used, and is used.
Example III
Referring to fig. 1 to 6, in this embodiment, basically the same as the first embodiment, more preferably, an anti-loosening plate 24 is disposed on the upper side of the wire arranging plate 16, and the right end of the anti-loosening plate 24 is attached to the wire 6, a third spring 25 is fixedly mounted at the left end of the anti-loosening plate 24, a vertical plate 26 is fixedly mounted at the left end of the third spring 25, and the lower end of the vertical plate 26 is fixedly connected with the wire arranging plate 16;
during the use, the anti-loosening plate 24 that sets up is under the effect of spring three 25, and when wire 6 was paid out, had played the effect that extrudees locking to wire 6 that the hob 4 upside was not paid out, had avoided wire 6 to appear droing in the unwrapping wire in-process.
Working principle:
when the invention is used, the positioning rod 11 is pulled upwards to slide out from the positioning groove 12, the sleeve 9 is pushed to move leftwards on the fixed rod 10, the sleeve 9 drives the detection head 8 to move leftwards, so that the position of the detection head 8 is convenient to adjust according to different radius sizes of containers, the detection head 8 reaches the position required to be detected, the application range is wide, after the adjustment is finished, the positioning rod 11 is loosened to rebound under the action of the spring four 27, the positioning rod 11 is inserted into the corresponding positioning groove 12 to limit the sleeve 9, the sleeve 9 also drives the rack 13 to slide leftwards when sliding leftwards, the rack 13 drives the transmission gear 14 to rotate, the transmission gear 14 drives the turntable 15 to rotate, the turntable 15 drives the spiral rod 4 to rotate, the spiral rod 4 rotates to automatically loosen the lead wire 6 wound on the surface of the spiral rod 4, so that the length of the lead wire 6 is convenient to be adaptively adjusted according to the extension of the detection head 8, the condition that the lead 6 falls into the mud layer during the interface detection of the mud layer is avoided because the lead 6 is overlong, thereby ensuring the normal detection of the interface of the mud layer, preventing the lead 6 from falling into the mud layer and causing pollution on the surface of the lead 6, the first conductive block 7 and the second conductive block 701 ensure the normal electrifying operation of the lead 6 when the screw rod 4 rotates and pays out, the gear ring 181 is driven to rotate when the turntable 15 rotates, the gear ring 181 drives the fixed gear 18 to rotate, the fixed gear 18 drives the screw rod 17 to rotate, the screw rod 17 drives the whole wire plate 16 to rise, the whole wire plate 16 is arranged to be convenient for self-adaptive adjustment according to the payed-out position of the screw rod 4, so that the whole wire plate 16 can keep the same horizontal line with the screw groove when the lead 6 is separated from the screw groove on the screw rod 4, thereby realized the even unwrapping wire of wire 6, avoid wire 6 to appear chaotic when unwrapping wire, the jam plate 24 of setting plays the effect of extrusion locking to wire 6 of unwrapping wire of hob 4 upside when wire 6 is unwrapping wire, avoided wire 6 to appear droing in the unwrapping wire in-process, wire 6 is when passing through whole line board 16, contact with ball 20, and drive ball 20 and rotate in ball seat 21, thereby the frictional friction of wire 6 direct and whole line board 16 inner wall has been reduced, certain auxiliary effect has been played to the unwrapping wire of wire 6, the telescopic link 22 of setting and spring two 23 when wire 6 passes through whole line board 16, the pressure between the ball 20 is adjusted in the adaptation, when detecting completely, upwards pulling locating lever 11 when receiving the line, push sleeve 9 moves rightwards, drive detection head 8 and reset rightwards, simultaneously, rack 13 drives drive carousel 15 and hob 4 counter-rotating, drive screw 17 counter rotating through fixed gear 18 and ring gear 181 that sets up, make whole line board 16 constantly, can realize the automatic wire winding up and down 6 when receiving wire 6 and then realizing the automatic winding and releasing of wire on the hob 6.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a convenient non-contact mud layer interface appearance that removes, includes support (1), its characterized in that, support (1) lower extreme four corners department equal fixed mounting has universal wheel (2), and support (1) left end fixed mounting has interface appearance body (3), interface appearance body (3) lower extreme is equipped with hob (4), and the winding has wire (6) on hob (4), wire (6) lower extreme fixed mounting has detection head (8), detection head (8) right-hand member fixed mounting has sleeve (9), sleeve (9) right-hand member cartridge has dead lever (10), dead lever (10) right-hand member fixed mounting is on support (1), sleeve (9) upper end right side runs through and has locating lever (11), locating lever (11) upper cover is equipped with spring four (27), and both ends are fixed connection locating lever (11) and sleeve (9) respectively about spring four (27), a plurality of constant head (12) have all been seted up to locating lever (11) on hob (10) upper end correspondence locating lever (11), locating lever (11) cartridge is at dead lever (10) upper end, and is fixed mounting has sleeve (14) between constant head (12), rack (14) upper end and equal space, rack (14) are fixed mounting has on the rack (14), the upper end of the rotary table (15) is fixedly arranged on the screw rod (4), a wire arranging plate (16) is arranged on the left lower side of the screw rod (4), a wire (6) penetrates through the right side of the wire arranging plate (16), a plurality of balls (20) are arranged on the outer side of the wire (6) in the wire arranging plate (16), one end, far away from the wire (6), of each ball (20) is inserted with a ball seat (21), each ball (20) is rotationally connected with the ball seat (21), the surface of the wire (6) is attached to each ball (20), an anti-loosening plate (24) is arranged on the upper side of the wire arranging plate (16), and the right end of the anti-loosening plate (24) is attached to the wire (6);
the wire arranging plate (16) is in threaded connection with a screw (17), the upper end of the screw (17) is in rotary connection with the interface instrument body (3), a fixed gear (18) is fixedly arranged at the lower end of the screw (17), a gear ring (181) is fixedly arranged at the upper end of the rotary table (15), the fixed gear (18) is meshed with the gear ring (181), and the screw (17) is in rotary connection with the rotary table (15);
a guide rod (19) is connected to the left side of the wire arranging plate (16) in a penetrating and sliding manner, and the upper end of the guide rod (19) is fixedly connected with the interface instrument body (3);
the left end of the anti-loosening plate (24) is fixedly provided with a third spring (25), the left end of the third spring (25) is fixedly provided with a vertical plate (26), and the lower end of the vertical plate (26) is fixedly connected with the line-arranging plate (16).
2. The non-contact mud layer interface instrument convenient to move according to claim 1, wherein a rotary groove (5) is formed in the lower end of the interface instrument body (3) corresponding to the screw rod (4), and the screw rod (4) is rotationally connected with the interface instrument body (3).
3. The non-contact mud layer interface instrument convenient to move according to claim 1, wherein a second conductive block (701) is fixedly installed in the lower end of the interface instrument body (3), a first conductive block (7) is fixedly installed at the upper end of the screw rod (4) corresponding to the second conductive block (701), the first conductive block (7) and the second conductive block (701) are mutually attached, and the upper end of the wire (6) is fixedly connected with the first conductive block (7).
4. The non-contact mud layer interface instrument convenient to move according to claim 1, wherein a plurality of telescopic rods (22) are fixedly arranged at one ends of the ball seats (21) far away from the wires (6), and the other ends of the telescopic rods (22) are fixedly arranged in the whole wire plate (16).
5. The non-contact mud layer interface instrument convenient to move according to claim 4, wherein the telescopic rod (22) is sleeved with a second spring (23), one end of the second spring (23) close to each other is fixedly connected with the ball seat (21), and one end of the second spring (23) far away from each other is fixedly connected with the wire arranging plate (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111248283.8A CN113984147B (en) | 2021-10-26 | 2021-10-26 | Convenient non-contact mud layer interface appearance that removes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111248283.8A CN113984147B (en) | 2021-10-26 | 2021-10-26 | Convenient non-contact mud layer interface appearance that removes |
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| CN113984147A CN113984147A (en) | 2022-01-28 |
| CN113984147B true CN113984147B (en) | 2023-09-26 |
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| CN117824784B (en) * | 2024-01-18 | 2024-07-16 | 北京安合众道安全技术有限公司 | Muddy water interface instrument based on photoelectric sensing AI data analysis |
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| CN214200278U (en) * | 2021-02-07 | 2021-09-14 | 杭州艾科赛德电子科技有限公司 | Detection line coiling mechanism for mud layer interface instrument |
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| CN113984147A (en) | 2022-01-28 |
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