CN114645966A - Manual hydraulic switching device for hydraulic valve driving device - Google Patents
Manual hydraulic switching device for hydraulic valve driving device Download PDFInfo
- Publication number
- CN114645966A CN114645966A CN202210394821.2A CN202210394821A CN114645966A CN 114645966 A CN114645966 A CN 114645966A CN 202210394821 A CN202210394821 A CN 202210394821A CN 114645966 A CN114645966 A CN 114645966A
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- Prior art keywords
- handle
- hydraulic
- valve driving
- driving device
- positioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/14—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves
- F16K31/143—Actuating devices; Operating means; Releasing devices actuated by fluid for mounting on, or in combination with, hand-actuated valves the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention relates to a manual hydraulic switching device for a hydraulic valve driving device, wherein the hydraulic valve driving device is provided with a hydraulic cylinder, the hydraulic cylinder is provided with two working oil cavities, and the hydraulic cylinder comprises an installation block, a handle, a rotating piece and a rotary positioning mechanism for fixing the position of the handle; the handle is positioned above the mounting block, the rotating part is rotatably connected with the handle and the mounting block, a third oil duct is arranged in the rotating part, a first oil duct and a second oil duct which can be converted and communicated with the third oil duct are arranged in the mounting block, and the first oil duct and the second oil duct are respectively and correspondingly communicated with the two working oil cavities; the rotary positioning mechanism is movably connected with the handle, and one end of the rotary positioning mechanism can be movably inserted in the mounting block to fix the position of the handle. When the hydraulic cylinder enters a manual mode, the two working oil cavities of the hydraulic cylinder are communicated, no pressure difference exists, and the position of a piston in the hydraulic cylinder can be adjusted at will, so that the manual operation is more convenient; the hydraulic valve driving device is ingenious in structure, convenient and fast to manually switch and high in reliability, and meanwhile, the hydraulic valve driving device can be operated manually and more labor-saving.
Description
Technical Field
The invention relates to a hydraulic valve driving device, in particular to a manual hydraulic switching device for the hydraulic valve driving device.
Background
The valve driving device is used for operating and controlling the valve and is connected with the valve, and the purpose of use is to save labor and facilitate and speed the operation of the valve or realize automatic control or remote control. The hydraulic valve driving device drives the valve to rotate through hydraulic oil, and manual operation is difficult due to the fact that pressure difference exists between two working oil cavities in the existing hydraulic valve driving device in the manual operation process.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a manual hydraulic switching device which can save labor in manual operation of a hydraulic valve driving device.
Disclosure of Invention
The invention aims to provide a manual hydraulic switching device which can save labor in manual operation of a hydraulic valve driving device.
The technical scheme for solving the technical problems is as follows: a manual hydraulic switching device for a hydraulic valve driving device is provided with a hydraulic cylinder, wherein the hydraulic cylinder is provided with two working oil cavities and comprises an installation block, a handle, a rotating piece and a rotary positioning mechanism for rotating and positioning the position of the handle;
the handle is positioned above the mounting block and is rotatably connected with the handle and the mounting block through a rotating part, a third oil duct is arranged in the rotating part, a first oil duct and a second oil duct which are used for converting and communicating the third oil duct by the rotating part are arranged in the mounting block, and the first oil duct and the second oil duct are respectively and correspondingly communicated with two working oil cavities;
the rotary positioning mechanism is movably connected with the handle, and one end of the rotary positioning mechanism can be movably inserted in the position of the handle on the mounting block to be positioned.
The beneficial effects of the invention are: the handle is rotated to enable the third channel to be communicated with the first oil duct and the second oil duct, the handle is positioned through the rotary positioning mechanism, the hydraulic valve driving device enters a manual mode, at the moment, the two working oil cavities of the hydraulic cylinder are communicated, no pressure difference exists, the piston in the hydraulic cylinder can be manually adjusted to any position, debugging, maintenance and the like are facilitated, and manual operation is more convenient; the handle is rotated to disconnect the third channel from the first oil channel and the second oil channel, the handle is positioned through the rotary positioning mechanism, the hydraulic drive mode is entered, at the moment, the two working oil cavities of the hydraulic cylinder are disconnected and are independent, the hydraulic cylinder can automatically adjust the position through hydraulic pressure, and the hydraulic cylinder returns to normal operation. The hydraulic valve driving device is ingenious in structure, convenient and fast to manually switch and high in reliability, and meanwhile, the hydraulic valve driving device can be operated manually and more labor-saving.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the rotary positioning mechanism comprises a movable block, a positioning shaft and an elastic part, a positioning hole is formed in the mounting block, the movable block is located above the handle, one end of the positioning shaft is connected to the movable block, the other end of the positioning shaft is movably inserted into the handle in a limiting mode, the elastic part is arranged inside the handle and sleeved on the positioning shaft, and the other end of the positioning shaft is movably inserted into the positioning hole.
The beneficial effect of adopting the further scheme is that: the other end of the positioning shaft is movably limited in the handle, the movable block is moved upwards by applying external force to drive the positioning shaft to move upwards, the elastic part is compressed, no positioning exists between the handle and the installation block, the handle can be rotated to enable the third channel to be communicated with or disconnected from the first oil duct and the second oil duct, the handle rotates in place, the external force is released, and the movable block enables the positioning shaft to be inserted into the positioning hole and positions the handle under the action of the elastic force of the elastic part.
Furthermore, the locating shaft comprises a threaded connection section, a small-diameter part and a large-diameter part which are sequentially connected, the threaded connection section is in threaded connection with the movable block, the elastic piece is sleeved on the small-diameter part, and the large-diameter part is movably inserted into the locating hole.
The further scheme has the advantages that the threaded connection and the disassembly are convenient, and the positioning shaft is more convenient to replace; the arrangement of the large diameter part can prevent the handle from falling off.
Furthermore, the end of the large-diameter part is provided with a straight groove for screwing the threaded connection section into the movable block, and the beneficial effect of the further scheme is that the positioning shaft is conveniently screwed into the movable block.
Furthermore, a first limiting groove and a second limiting groove which are used for limiting the position of the movable block are formed in the handle, the first limiting groove is parallel to the axis of the first oil duct, the second limiting groove is perpendicular to the first limiting groove, the depth of the second limiting groove is larger than that of the first limiting groove, the lower end of the movable block is arranged in the first limiting groove and the second limiting groove in a convertible mode, and the end portion of the movable block corresponding to the large diameter can be positioned inside the handle or in the positioning hole.
The beneficial effect of adopting the further scheme is that: when the movable block is arranged in the first limiting groove, the large-diameter part is completely positioned inside the handle in a natural state, the handle can be rotated at the moment, when the handle reaches a preset position, the movable block is arranged in the second limiting groove, the large-diameter part protrudes out of the bottom surface of the handle in a natural state and can be inserted into the positioning hole, the handle cannot rotate at the moment, and the reliability of operation is further improved.
Furthermore, the positioning holes comprise a first positioning hole and a second positioning hole, the connecting line of the first positioning hole and the axis of the rotating part is parallel to the axis of the first oil duct, and the connecting line of the second positioning hole and the axis of the rotating part is perpendicular to the axis of the first oil duct.
The beneficial effect of adopting the further scheme is that when the large-diameter part is inserted in the first positioning hole, the third oil duct is communicated with the first oil duct and the second oil duct, and when the large-diameter part is inserted in the second positioning hole, the third oil duct is disconnected with the first oil duct and the second oil duct.
Further, the handle is prevented from falling off, and the nut is in threaded connection with the rotating piece.
Adopt above-mentioned further scheme's beneficial effect to prevent that the handle from deviating from and rotate the piece.
Furthermore, the mounting block is provided with a handle limiting groove for limiting the movement of the handle.
The beneficial effect who adopts above-mentioned further scheme is that when the handle rotated to manual position or liquid position, the handle received the restriction of handle spacing groove edge, can't continue to rotate again, has further improved the convenience and the accuracy of operation.
Furthermore, a manual identification sticker is pasted at a position, corresponding to the first positioning hole, on the mounting block, and a hydraulic identification sticker is pasted at a position, corresponding to the second positioning hole, on the mounting block.
The beneficial effect of adopting the above-mentioned further scheme is that the mark is visualized, prevents making mistakes.
Drawings
FIG. 1 is a schematic structural diagram of a manual hydraulic switching device for a hydraulic valve driving device according to the present invention;
FIG. 2 is a cross-sectional view of the mounting block of the present invention;
FIG. 3 is a top view of the mounting block of the present invention;
FIG. 4 is a cross-sectional view of a rotating member of the present invention;
FIG. 5 is a cross-sectional view of the handle of the present invention;
FIG. 6 is a top view of the handle of the present invention;
FIG. 7 is a front view of a movable block of the present invention;
FIG. 8 is a cross-sectional view of a movable block of the present invention;
FIG. 9 is a bottom view of the movable block of the present invention;
FIG. 10 is a schematic view of a positioning shaft according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the oil pump comprises a mounting block 11, a first oil channel 12, a second oil channel 13, a positioning hole 131, a first positioning hole 132, a second positioning hole 14 and a handle limiting groove;
2. the handle 21, the first limiting groove 22, the second limiting groove 23, the first positioning shaft hole 24 and the second positioning shaft hole;
3. a rotating member 31, a third oil passage;
4. the device comprises a rotary positioning mechanism 41, a movable block 42, a positioning shaft 421, a threaded connection section 422, a small diameter part 423, a large diameter part 4231, a straight groove 43 and an elastic part;
5. and a nut.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
The invention relates to a manual hydraulic switching device for a hydraulic valve driving device, which is provided with a hydraulic cylinder as shown in figures 1-10, wherein the hydraulic cylinder is provided with two working oil cavities and comprises an installation block 1, a handle 2, a rotating part 3 and a rotary positioning mechanism 4 for rotating and positioning the position of the handle 2;
the handle 2 is positioned above the mounting block 1 and is rotatably connected with the handle 2 and the mounting block 1 through the rotating part 3, the rotating part 3 is internally provided with a third oil duct 31, the mounting block 1 is internally provided with a first oil duct 11 and a second oil duct 12 which can be converted and communicated with the third oil duct 31 through the rotating part 3, and the first oil duct 11 and the second oil duct 12 are respectively and correspondingly communicated with two working oil cavities;
the rotary positioning mechanism 4 is movably connected with the handle 2, and one end of the rotary positioning mechanism can be movably inserted on the mounting block 1 to position the handle 2.
Advantageously, the rotary member 3 is rotatably connected to the handle 2 by means of a profiled shaft connection, a keyed connection, a pin connection, etc.
According to an embodiment of the present invention, the rotary positioning mechanism 4 includes a movable block 41, a positioning shaft 42 and an elastic member 43, the mounting block 1 is provided with a positioning hole 13, one end of the positioning shaft 42 is fixed on the movable block 41, the other end of the positioning shaft 42 is movably inserted and limited in the handle 2, the elastic member 43 is arranged in the handle 2 and penetrates through the positioning shaft 42, the positioning shaft 42 is movably inserted in the positioning hole 13, when the positioning shaft 42 is inserted in the positioning hole 13, the handle 2 cannot rotate, the movable block 41 is pulled to drive the positioning shaft 42 to leave the positioning hole 13, and at this time, the handle 2 can rotate.
The fixed connection mode of the positioning shaft 42 and the movable block 41 can be welding, screw connection, threaded connection and the like, and more advantageously, the threaded connection is convenient to detach, so that the positioning shaft 42 is convenient to replace.
According to an embodiment of the present invention, the positioning shaft 42 includes a threaded connection section 421, a small diameter portion 422 and a large diameter portion 423, which are sequentially connected, the threaded connection section 421 is in threaded connection with the movable block 41, the elastic member 43 is sleeved on the small diameter portion 422, and the large diameter portion 423 is movably inserted into the positioning hole 13.
Advantageously, the end of the large diameter portion 423 is provided with a straight groove 4231 for facilitating the positioning shaft 42 to be screwed into the movable block 41.
According to an embodiment of the present invention, the handle 2 is provided with a first positioning shaft hole 23 and a second positioning shaft hole 24 which are sequentially communicated, the first positioning shaft hole 23 and the second positioning shaft hole 24 are located below the second limiting groove 22, the small diameter portion 422 sequentially passes through the second positioning shaft hole 24 and the first positioning shaft hole 23 and is in threaded connection with the movable block 41, the diameter of the first positioning shaft hole 23 is smaller than that of the second positioning shaft hole 24, so that the large diameter portion 423 can only move in the second positioning shaft hole 24, the elastic member 43 is sleeved on the small diameter portion 422 and is located in the second positioning shaft hole 24, the large diameter portion 423 moves upward under the driving of the movable block 41, the elastic member 43 is compressed, the force on the movable block 41 is cancelled, and the elastic member 43 drives the large diameter portion 423 to automatically reset.
According to an embodiment of the present invention, the handle 2 is provided with a first limiting groove 21 and a second limiting groove 22 for limiting the position of the movable block 41, the first limiting groove 21 is parallel to the axis of the first oil channel 11, the second limiting groove 22 is perpendicular to the first limiting groove 21, the depth of the second limiting groove 22 is greater than that of the first limiting groove 21, when the movable block 41 is disposed in the first limiting groove 21, the large diameter portion 422 is all disposed in the handle 2 in a natural state, the handle 2 can be rotated at this time, when the handle 2 reaches a predetermined position, the movable block 41 is disposed in the second limiting groove 21, the large diameter portion 422 protrudes from the bottom surface of the handle 2 in a natural state and can be inserted into the positioning hole 13, at this time, the handle cannot be rotated, and the reliability of operation is further improved.
According to an embodiment of the present invention, the positioning hole 13 includes a first positioning hole 131 and a second positioning hole 132, a connecting line of the first positioning hole 131 and the axis of the rotating member 3 is parallel to the axis of the first oil passage 11, a connecting line of the second positioning hole 132 and the axis of the rotating member 3 is perpendicular to the axis of the first oil passage 11, when the large diameter portion 422 is inserted into the first positioning hole 131, the third oil passage 31 is communicated with the first oil passage 11 and the second oil passage 12, and when the large diameter portion 422 is inserted into the second positioning hole 132, the third oil passage 31 is disconnected from the first oil passage 11 and the second oil passage 12.
According to an embodiment of the present invention, a nut 5 for preventing the handle 2 from being removed is further included, and the nut 5 is threadedly coupled to the rotation member 3.
According to one embodiment of the invention, the mounting block 1 is provided with a handle limiting groove 14 for limiting the movement of the handle, when the handle 2 rotates to a manual position or a hydraulic position, the handle 2 is limited by the edge of the handle limiting groove 14 and cannot rotate any more, so that the convenience and the accuracy of operation are further improved.
According to an embodiment of the present invention, a manual label is attached to the mounting block 1 at a position corresponding to the first positioning hole 131, and a hydraulic label is attached to the mounting block at a position corresponding to the second positioning hole 132.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A manual hydraulic switching device for a hydraulic valve driving device, which is provided with a hydraulic cylinder with two working oil cavities, is characterized by comprising a mounting block (1), a handle (2), a rotating piece (3) and a rotary positioning mechanism (4) for rotating and positioning the handle (2);
the handle (2) is positioned above the mounting block (1) and is rotatably connected with the handle (2) and the mounting block (1) through the rotating piece (3), a third oil duct (31) is arranged in the rotating piece (3), a first oil duct (11) and a second oil duct (12) which are communicated with the third oil duct (31) in a convertible manner are arranged in the mounting block (1), and the first oil duct (11) and the second oil duct (12) are respectively communicated with two working oil cavities correspondingly;
the rotary positioning mechanism (4) is movably connected with the handle (2), and one end of the rotary positioning mechanism can be movably inserted into the mounting block (1) to position the handle (2).
2. The manual hydraulic switching device for the hydraulic valve driving device according to claim 1, wherein the rotary positioning mechanism (4) comprises a movable block (41), a positioning shaft (42) and an elastic member (43), the mounting block (1) is provided with a positioning hole (13), the movable block (41) is located above the handle, one end of the positioning shaft (42) is connected to the movable block (41), the other end of the positioning shaft is movably inserted and limited in the handle (2), the elastic member (43) is arranged in the handle (2) and sleeved on the positioning shaft (42), and the other end of the positioning shaft (42) is movably inserted in the positioning hole (13).
3. The manual-hydraulic switching device for the hydraulic valve driving device according to claim 2, wherein the positioning shaft (42) comprises a threaded connection section (421), a small diameter part (422) and a large diameter part (423) which are sequentially connected, the threaded connection section (421) is in threaded connection with the movable block (41), the elastic part (43) is sleeved on the small diameter part (422), and the large diameter part (423) is movably inserted into the positioning hole (13).
4. The manual-hydraulic switching device for a hydraulic valve driving device according to claim 3, wherein the end of the large diameter portion (423) is opened with a straight groove (4231) for screwing the screw coupling section (421) into the movable block (41).
5. The manual hydraulic switching device for the hydraulic valve driving device according to claim 3, wherein a first limiting groove (21) and a second limiting groove (22) for limiting the position of the movable block (41) are formed in the handle (2), the first limiting groove (21) is parallel to the axis of the first oil channel (11), the second limiting groove (22) is perpendicular to the first limiting groove (21), the depth of the second limiting groove (22) is greater than that of the first limiting groove (21), the lower end of the movable block (41) can be converted into the first limiting groove (21) and the second limiting groove (21), and the end corresponding to the large diameter can be positioned inside the handle (2) or inside the positioning hole (13).
6. The manual hydraulic switching device for a hydraulic valve driving device according to claim 4, wherein the positioning hole (13) includes a first positioning hole (131) and a second positioning hole (132), a line connecting the first positioning hole (131) and the shaft center of the rotating member (3) is parallel to the axis of the first oil passage (11), and a line connecting the second positioning hole (132) and the shaft center of the rotating member (3) is perpendicular to the axis of the first oil passage (11).
7. The manual hydraulic switching device for a hydraulic valve driving device according to any one of claims 1 to 6, further comprising a nut (5) for preventing the handle (2) from being removed, wherein the nut (5) is threadedly coupled to the rotary member (3).
8. The manual hydraulic switching device for the hydraulic valve driving device according to claim 7, characterized in that the mounting block (1) is provided with a handle limiting groove (14) for limiting the movement of the handle.
9. The manual hydraulic switching device for the hydraulic valve driving device according to claim 8, wherein a manual label is pasted on the position of the mounting block (1) corresponding to the first positioning hole (131), and a hydraulic label is pasted on the position corresponding to the second positioning hole (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210394821.2A CN114645966B (en) | 2022-04-14 | 2022-04-14 | Manual hydraulic switching device for hydraulic valve driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210394821.2A CN114645966B (en) | 2022-04-14 | 2022-04-14 | Manual hydraulic switching device for hydraulic valve driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114645966A true CN114645966A (en) | 2022-06-21 |
| CN114645966B CN114645966B (en) | 2023-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210394821.2A Active CN114645966B (en) | 2022-04-14 | 2022-04-14 | Manual hydraulic switching device for hydraulic valve driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114645966B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214231A (en) * | 2004-01-27 | 2005-08-11 | Ckd Corp | Combined valve |
| CN2755379Y (en) * | 2004-11-19 | 2006-02-01 | 尹人奇 | High and low pressure switch rotary valve |
| CN206468880U (en) * | 2016-12-14 | 2017-09-05 | 中国石油化工股份有限公司 | Hand liquid-operated flat valve |
| CN110939618A (en) * | 2019-12-26 | 2020-03-31 | 许尚志 | Pressure maintaining type single-action hydraulic manual mechanism |
| CN211975940U (en) * | 2020-04-11 | 2020-11-20 | 大连鼎泰机械设备有限公司 | Hand stop valve |
| CN113915400A (en) * | 2021-11-05 | 2022-01-11 | 中煤科工集团唐山研究院有限公司 | High-pressure gate valve actuating mechanism |
-
2022
- 2022-04-14 CN CN202210394821.2A patent/CN114645966B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214231A (en) * | 2004-01-27 | 2005-08-11 | Ckd Corp | Combined valve |
| CN2755379Y (en) * | 2004-11-19 | 2006-02-01 | 尹人奇 | High and low pressure switch rotary valve |
| CN206468880U (en) * | 2016-12-14 | 2017-09-05 | 中国石油化工股份有限公司 | Hand liquid-operated flat valve |
| CN110939618A (en) * | 2019-12-26 | 2020-03-31 | 许尚志 | Pressure maintaining type single-action hydraulic manual mechanism |
| CN211975940U (en) * | 2020-04-11 | 2020-11-20 | 大连鼎泰机械设备有限公司 | Hand stop valve |
| CN113915400A (en) * | 2021-11-05 | 2022-01-11 | 中煤科工集团唐山研究院有限公司 | High-pressure gate valve actuating mechanism |
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| Publication number | Publication date |
|---|---|
| CN114645966B (en) | 2023-09-12 |
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