CN114156780B - Extra-high voltage transmission line strain insulator chain business turn over operation connecting device - Google Patents
Extra-high voltage transmission line strain insulator chain business turn over operation connecting device Download PDFInfo
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- CN114156780B CN114156780B CN202111512188.4A CN202111512188A CN114156780B CN 114156780 B CN114156780 B CN 114156780B CN 202111512188 A CN202111512188 A CN 202111512188A CN 114156780 B CN114156780 B CN 114156780B
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- insulator
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- transmission line
- high voltage
- voltage transmission
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 239000012211 strain insulator Substances 0.000 title claims abstract description 18
- 230000007306 turnover Effects 0.000 title claims abstract description 6
- 239000012212 insulator Substances 0.000 claims abstract description 61
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 3
- 239000010432 diamond Substances 0.000 claims abstract description 3
- 210000000078 claw Anatomy 0.000 claims description 28
- 230000009194 climbing Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 241000282326 Felis catus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
Landscapes
- Insulators (AREA)
Abstract
The invention discloses an operation connection device for an ultra-high voltage transmission line tension insulator string, and belongs to the technical field of insulators. The utility model provides an extra-high voltage transmission line strain insulator chain business turn over operation connecting device, including the fixing base, it is left and right sides the structure and rotate through the round pin axle and be connected with two push rods to lead to the groove middle part, the push rod upper end is diamond structure and rotates through the round pin axle and be connected with a plurality of connecting rods, fixing base upside left end intermediate position is equipped with the insulator post, insulator post circumference outer wall is linear equidistant and is equipped with a plurality of insulator bodies, insulator post lower extreme cover is equipped with hollow push pedal, close fit between the structure, make the device when dismantling the installation to the insulator body, can make the connecting rod upwards push away the insulator body through the hollow push pedal through telescopic link B, make it can be taken down in proper order, the higher condition that can't take down in proper order of fixed column has been avoided, the insulator body can not be broken by the condition in the installation has been protected simultaneously, efficiency has been improved, installation quality has been guaranteed.
Description
Technical Field
The invention relates to the technical field of insulators, in particular to an operation connecting device for an ultra-high voltage transmission line strain insulator string.
Background
The strain insulator string is an important element in the process of erecting a power transmission line, and mainly comprises a ceramic strain insulator string and a composite strain insulator string, and can effectively isolate a charged wire from the ground and enable each wire to keep its own position.
The prior art publication No. CN210297073U provides a connection device for the in-out operation of an insulator string of an extra-high voltage transmission line, the device is characterized in that a mounting sleeve ring is sleeved on a tension insulator string, a fixing base is mounted on a connecting fitting of the tension insulator string, the stability of a T-shaped frame is ensured under the action of the mounting sleeve ring and the fixing base, and the stability of a worker walking on the T-shaped frame is facilitated;
the prior art publication No. CN106451237B provides a device for connecting an extra-high voltage transmission line strain insulator string in and out operation and a using method thereof, the device comprises a flexible body, a first connector, a second connector and a tightener, wherein the flexible body comprises two first strip-shaped parts and one second strip-shaped part with the same length, and the tail ends of the two first strip-shaped parts and the tail end of the second strip-shaped part are connected in a common point to form a Y shape;
other prior art CN109038363a relates to a suspension type strain insulator string connecting device with a magnet for adjusting the distance between high-voltage strings, which can realize convenient stepping, maintenance and climbing, but needs to be equipped with a spring wire and a spring tube, but the device is easy to rust and change in rigidity in long-time outdoor environment, so that the maintenance frequency can be greatly increased.
Although the device can finish the operation connection of the insulator string of the ultra-high voltage transmission line, the following problems still exist: the device is simple in structure, when the insulator on the high-voltage line is detached and installed, the insulator on the fixed column cannot be sequentially taken down manually, and the insulator can be directly placed when installed, the insulator can be damaged in the falling process, meanwhile, potential safety hazards exist for workers, the center of gravity is easy to fall down unstably, and therefore, the device for connecting the tension insulator string of the ultra-high-voltage transmission line in and out operation is provided.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to provide an operation connection device for in-out operation of an ultra-high voltage transmission line strain insulator string, so as to solve the problems in the background technology.
2. Technical proposal
The utility model provides an extra-high voltage transmission line strain insulator chain business turn over operation connecting device, includes the fixing base, fixing base left side middle part is equipped with the pole-climbing, pole-climbing circumference outer wall one side is equipped with and is linear equidistant welding has a plurality of cat ladders, the pole-climbing upper end is equipped with the operation platform, operation platform upside limit department is equipped with the guardrail, operation platform upside left end is equipped with F type fixed block, F type fixed block upside right-hand member is equipped with telescopic link A, telescopic link A lower extreme passes inside the extending to the outside of F type fixed block and has set firmly the support frame, the support frame downside has set firmly the control block of snatching, snatch the inside cross groove of having seted up of control block, snatch control block upside middle part and be equipped with the pneumatic cylinder, the pneumatic cylinder piston end passes and snatchs the inside rack that has set firmly of control block outer wall extension to the cross groove, the inside inboard of cross groove is connected with sector gear through the round pin axle rotation, the lower side of the sector gear is fixedly provided with a supporting rod, the upper end of the outer side of the inner part of the cross-shaped groove is rotationally connected with a balancing rod through a pin shaft, a plurality of picking claws are annularly and equidistantly arranged below the grabbing control block, the upper ends of the picking claws are welded with fixing rods, the left end of the upper side of the F-shaped fixing block is provided with a controller, the middle position of the left end of the upper side of the fixing seat is symmetrically provided with two empty grooves, the middle position of the inner wall of each empty groove is fixedly provided with a limiting block, the upper side of each limiting block is fixedly provided with a telescopic rod B, the inner side of each empty groove is provided with a through groove, the middle part of each through groove is in a left-right structure and is rotationally connected with two push rods through a pin shaft, the upper ends of the push rods are in a diamond structure and are rotationally connected with a plurality of connecting rods through the pin shafts, the middle position of the left end of the upper side of the fixing seat is provided with insulator columns, the circumference outer walls of the insulator columns are linearly and equidistantly provided with a plurality of insulator bodies, the insulator post lower extreme cover is equipped with the cavity push pedal, cavity push pedal circumference inner wall symmetry is equipped with two spacing posts, two square grooves have been seted up to cavity push pedal bottom surface symmetry.
Preferably, the rack is arranged in a cross-shaped structure, and the rack is connected with the sector gear in a meshed manner.
Preferably, the outer side of the fixed rod is rotatably connected with the lower end of the supporting rod through a pin shaft, and the inner side of the fixed rod is rotatably connected with the lower end of the balancing rod through a pin shaft.
Preferably, the upper end of the telescopic rod B is fixedly connected with one of the pin shafts, and the upper end of the connecting rod is rotatably connected with a hole formed in the inner wall of the square groove through the pin shaft.
Preferably, two sliding grooves are symmetrically formed in the outer wall of the circumference of the insulator column, and the sliding grooves are in sliding connection with the limit columns.
Preferably, the picking claw is arranged in a C-shaped structure, and a plurality of picking claws are clamped with the insulator body.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the telescopic rod B is fixedly arranged on the upper side of the limiting block, the middle part of the through groove is in a left-right structure and is rotationally connected with the two push rods through the pin shaft, so that when the insulator body is disassembled and assembled, the connecting rod can push the insulator body upwards through the hollow push plate through the telescopic rod B, so that the insulator body can be sequentially taken down, the situation that the fixing column is higher and can not be sequentially taken down is avoided, meanwhile, the insulator body is protected from being broken in the assembling process, the efficiency is improved, and the assembling quality is ensured.
2. According to the invention, the middle part of the upper side of the grabbing control block is provided with the hydraulic cylinder, the piston end of the hydraulic cylinder penetrates through the outer wall of the grabbing control block and extends into the cross-shaped groove, the inner side of the cross-shaped groove is rotationally connected with the sector gear through the pin shaft, and the plurality of grabbing claws are arranged at equal intervals in an annular shape below the grabbing control block, so that the grabbing claws are matched with the pushing of the hollow push plate, the insulator body at the uppermost end of the insulator column can be directly taken down or installed, and the like, so that the efficiency is improved, and the situation of dangerous or damage of manual taking or installation is avoided.
3. According to the invention, a controller worker can control and cooperate the claw taking and hollow pushing plate on the operation platform 4; get claw and be C type structure setting, a plurality of get claw and insulator body centre gripping can directly snatch the insulator body through getting the claw, and the setting of C type structure for get claw can not too tight and can not lead to the insulator body to drop equally.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the empty slot of the present invention;
FIG. 3 is a schematic view of a connecting rod structure according to the present invention;
FIG. 4 is a schematic view of a grabbing assembly according to the present invention;
FIG. 5 is a split view of the rack structure of the present invention;
the reference numerals in the figures illustrate: 1. a fixing seat; 101. a hollow groove; 102. a limiting block; 103. a telescopic rod B; 104. a through groove; 105. a push rod; 106. a connecting rod; 2. climbing a pole; 3. a ladder stand; 4. an operation platform; 5. guard bars; 6. f-shaped fixed blocks; 7. a telescopic rod A; 701. a support frame; 702. grabbing a control block; 703. a cross-shaped groove; 704. a hydraulic cylinder; 705. a rack; 706. a sector gear; 707. a support rod; 708. a balance bar; 709. taking claws; 7010. a fixed rod; 8. an insulator column; 801. a limit column; 9. an insulator body; 10. a hollow push plate; 1001. a limit column; 1002. and (5) a square groove.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus 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.
In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1-5, the present invention provides a technical solution:
the utility model provides an extra-high voltage transmission line strain insulator chain business turn over operation connecting device, including fixing base 1, fixing base 1 left side middle part is equipped with pole climbing 2, pole climbing 2 circumference outer wall one side is equipped with and is linear equidistant welding has a plurality of cat ladder 3, pole climbing 2 upper end is equipped with operation platform 4, operation platform 4 upper side limit department is equipped with guardrail 5, operation platform 4 upside left end is equipped with F type fixed block 6, F type fixed block 6 upside right-hand member is equipped with telescopic link A7, telescopic link A7 lower extreme passes F type fixed block 6 inside extension to outside and has set firmly support frame 701, support frame 701 downside has set firmly and snatch control block 702, snatch control block 702 inside has seted up cross-shaped groove 703, snatch control block 702 upside middle part is equipped with pneumatic cylinder 704, the piston end of pneumatic cylinder 704 passes snatch control block 702 outer wall and extends to cross-shaped groove 703 inside and has set firmly rack 705, cross-shaped groove 703 inside inboard is connected with sector gear 706 through the round pin axle rotation, a support rod 707 is fixedly arranged at the lower side of the sector gear 706, a balance rod 708 is rotationally connected to the upper end of the inner side of the cross-shaped groove 703 through a pin shaft, a plurality of taking claws 709 are annularly and equidistantly arranged below the grabbing control block 702, a fixing rod 7010 is welded at the upper end of each taking claw 709, a controller is arranged at the left end of the upper side of the F-shaped fixing block 6, two empty slots 101 are symmetrically arranged at the middle position of the left end of the upper side of the fixing seat 1, a limiting block 102 is fixedly arranged at the middle position of the inner wall of each empty slot 101, a telescopic rod B103 is fixedly arranged at the upper side of each limiting block 102, a through slot 104 is arranged at the inner side of each empty slot 101, two push rods 105 are rotationally connected to the middle of each through a left-right structure of each through pin shaft, a plurality of connecting rods 106 are rotationally connected to the upper ends of the push rods 105 through the pin shaft in a diamond-shaped structure, insulator columns 8 are arranged at the middle position of the upper side of the fixing seat 1, a plurality of insulator bodies 9 are linearly and equidistantly arranged on the circumference outer wall of the insulator columns 8, the lower end of the insulator column 8 is sleeved with a hollow push plate 10, two limit columns 1001 are symmetrically arranged on the inner wall of the circumference of the hollow push plate 10, and two square grooves 1002 are symmetrically arranged on the bottom surface of the hollow push plate 10. The tight fit between the structure for the device can make connecting rod 106 upwards push away insulator body 9 through cavity push pedal 10 through telescopic link B103 when dismantling the installation to insulator body 9, makes it can be taken down in proper order, has avoided the higher condition that can't take down in proper order of fixed column, has protected insulator body 9 simultaneously and can not break in the installation, has improved efficiency, has guaranteed installation quality.
Specifically, the rack 705 is disposed in a cross-shaped structure, and the rack 705 is engaged with the sector gear 706. The cross structure is arranged, so that the up-and-down movement of the rack 705 can drive the plurality of sector gears 706 to rotate at the same time, thereby driving the taking claw 709 to open and close.
Further, the outer side of the fixing rod 7010 is rotatably connected to the lower end of the supporting rod 707 through a pin, and the inner side of the fixing rod 7010 is rotatably connected to the lower end of the balancing rod 708 through a pin. Through the setting of dead lever 7010 and bracing piece 707 for when sector gear 706 drove bracing piece 707 skew, receive dead lever 7010's spacing, remain parallelogram type's parallel structure all the time, thereby realized getting claw 709 and opened and shut.
Still further, the upper end of the telescopic rod B103 is fixedly connected with one of the pin shafts, and the upper end of the connecting rod 106 is rotatably connected with a hole formed in the inner wall of the square groove 1002 through the pin shaft. The telescopic rod B103 drives a group of connecting rods 106 to open, so that other connecting rods 106 are unfolded, and the hollow push plate 10 is pushed to rise to push the insulator body 9.
Furthermore, two sliding grooves 801 are symmetrically formed on the circumferential outer wall of the insulator post 8, and the sliding grooves 801 are slidably connected with the limiting posts 1001.
The taking claws 709 are provided in a C-shaped structure, and the plurality of taking claws 709 are clamped with the insulator body 9. The insulator body 9 can be directly grabbed by the claw 709, and the C-shaped structure is arranged, so that the claw is not too tight and the insulator body 9 is not dropped.
When the extra-high voltage transmission line tension insulator string is required to enter and exit the operation connecting device for operation, firstly, a worker reaches the operation platform 4 through the ladder 3, and stretches the telescopic rod B103 through the controller, as the upper end of the telescopic rod B103 is fixedly connected with one pin shaft, the upper end of the connecting rod 106 is rotationally connected with a hole formed in the inner wall of the square groove 1002 through the pin shaft, a group of connecting rods 106 are driven to be opened through the telescopic rod B103, so that other connecting rods 106 are unfolded, the hollow push plate 10 is pushed to rise, the insulator body 9 is pushed to rise, at the moment, the telescopic rod A7 stretches and stretches, the claw 709 reaches the grabbing height, the piston end of the hydraulic cylinder 704 stretches, and as the piston end of the hydraulic cylinder 704 penetrates through the outer wall of the grabbing control block 703 to extend into the cross groove 703 and is fixedly provided with the rack 705, the rack 705 is in a cross structure, the rack 705 is meshed with the sector gears 706, the cross structure is arranged, so that the rack 705 moves up and down, a plurality of sector gears 706 can be driven to rotate simultaneously, the lower side of each sector gear 706 is fixedly provided with a supporting rod 707, the outer side of each fixing rod 7010 is rotationally connected with the lower end of each supporting rod 707 through a pin shaft, the inner side of each fixing rod 7010 is rotationally connected with the lower end of each balancing rod 708 through a pin shaft, and the fixing rods 7010 and the supporting rods 707 are arranged, so that when the sector gears 706 drive the supporting rods 707 to deviate, the fixing rods 7010 limit, and the parallel structure of the parallelogram is always kept, so that the opening and closing of the taking claws 709 are realized, the insulator body 9 is grabbed, and the taking claws 709 are in a C-shaped structure, and the plurality of taking claws 709 are clamped with the insulator body 9. The insulator body 9 can be directly grabbed through the claw 709, and the C-shaped structure is arranged, so that the claw cannot be too tightly taken, the insulator body 9 cannot fall off, and the insulator body 9 is assembled and disassembled.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides an extra-high voltage transmission line strain insulator chain business turn over operation connecting device, includes fixing base (1), its characterized in that: the utility model discloses a hydraulic support is characterized in that a climbing rod (2) is arranged in the middle of the left side of a fixed seat (1), a plurality of climbing ladders (3) are welded on one side of the circumferential outer wall of the climbing rod (2) at equal intervals in a linear manner, an operation platform (4) is arranged at the upper end of the climbing rod (2), a guardrail (5) is arranged at the upper side edge of the operation platform (4), an F-shaped fixed block (6) is arranged at the left end of the upper side of the operation platform (4), a telescopic rod A (7) is arranged at the right end of the upper side of the F-shaped fixed block (6), the lower end of the telescopic rod A (7) penetrates through the inner part of the F-shaped fixed block (6) to the outside and is fixedly provided with a supporting frame (701), a grabbing control block (702) is fixedly arranged at the lower side of the supporting frame (701), a cross-shaped groove (703) is formed in the inner part of the grabbing control block (702), a hydraulic cylinder (704) is arranged at the middle of the upper side of the grabbing control block (702), a piston end of the hydraulic cylinder (704) penetrates through the outer wall of the grabbing control block (702) to the inside and is fixedly provided with a rack (705), the inner side of the cross-shaped groove (703) is connected with a sector gear (706) through rotation, the inner side of the sector gear (706) is fixedly provided with a sector-shaped pin shaft (706), the sector-shaped inner side of the rotating shaft (706) is fixedly provided with a sector-shaped rotating shaft (706), the utility model discloses a safety device for the electric bicycle, including snatch control block (702), fixed seat (1) upper side left end, fixed seat (8) upper side left end intermediate position, fixed seat (1) upper side left end intermediate position symmetry has seted up two empty slots (101), empty slot (101) inner wall intermediate position has set firmly stopper (102), stopper (102) upside has set firmly telescopic link B (103), logical groove (104) have been seted up to empty slot (101) inboard, logical groove (104) middle part is controlling the structure and rotates through the round pin axle and be connected with two push rods (105), push rod (105) upper end is diamond structure and is connected with a plurality of connecting rods (106) through the round pin axle rotation, fixed seat (1) upper side left end intermediate position is equipped with insulator post (8), insulator post (8) circumference outer wall is linear equidistant and is equipped with a plurality of insulator body (9), insulator post (8) lower pot head has set hollow push pedal (10), hollow push pedal (10) inner wall (10) are equipped with two limit position limit switch (1002) symmetry bottom surface (10).
2. The device for connecting an ultra-high voltage transmission line strain insulator string in and out operation according to claim 1, wherein the device comprises: the rack (705) is arranged in a cross-shaped structure, and the rack (705) is meshed with the sector gear (706).
3. The device for connecting an ultra-high voltage transmission line strain insulator string in and out operation according to claim 1, wherein the device comprises: the outer side of the fixed rod (7010) is rotationally connected with the lower end of the supporting rod (707) through a pin shaft, and the inner side of the fixed rod (7010) is rotationally connected with the lower end of the balance rod (708) through a pin shaft.
4. The device for connecting an ultra-high voltage transmission line strain insulator string in and out operation according to claim 1, wherein the device comprises: the upper end of the telescopic rod B (103) is fixedly connected with one of the pin shafts, and the upper end of the connecting rod (106) is rotatably connected with a hole formed in the inner wall of the square groove (1002) through the pin shaft.
5. The device for connecting an ultra-high voltage transmission line strain insulator string in and out operation according to claim 1, wherein the device comprises: two sliding grooves (801) are symmetrically formed in the circumferential outer wall of the insulator column (8), and the sliding grooves (801) are slidably connected with the limiting columns (1001).
6. The device for connecting an ultra-high voltage transmission line strain insulator string in and out operation according to claim 1, wherein the device comprises: the claw (709) is arranged in a C-shaped structure, and a plurality of claw (709) are clamped with the insulator body (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111512188.4A CN114156780B (en) | 2021-12-07 | 2021-12-07 | Extra-high voltage transmission line strain insulator chain business turn over operation connecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111512188.4A CN114156780B (en) | 2021-12-07 | 2021-12-07 | Extra-high voltage transmission line strain insulator chain business turn over operation connecting device |
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| Publication Number | Publication Date |
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| CN114156780A CN114156780A (en) | 2022-03-08 |
| CN114156780B true CN114156780B (en) | 2023-11-21 |
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| CN105514869A (en) * | 2016-01-22 | 2016-04-20 | 国家电网公司 | Reset unit for correcting displacement of damper on electric transmission line |
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| Publication number | Publication date |
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| CN114156780A (en) | 2022-03-08 |
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