CN111946868A - Oil delivery valve with oil distribution structure and machining process thereof - Google Patents
Oil delivery valve with oil distribution structure and machining process thereof Download PDFInfo
- Publication number
- CN111946868A CN111946868A CN202010773011.9A CN202010773011A CN111946868A CN 111946868 A CN111946868 A CN 111946868A CN 202010773011 A CN202010773011 A CN 202010773011A CN 111946868 A CN111946868 A CN 111946868A
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- oil
- distribution structure
- bevel gear
- valve
- valve body
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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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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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
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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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
- F16K31/53—Mechanical actuating means with toothed gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses an oil delivery valve with an oil distribution structure and a processing technology thereof, belonging to the technical field of valves and comprising a valve body and a valve cover, wherein an oil delivery channel is arranged at the inner side of the valve body, an oil inlet is arranged at the middle end of the oil delivery channel, an oil outlet A and an oil outlet B are respectively arranged at the two ends of the oil delivery channel, annular seats which are symmetrically distributed are arranged on the inner wall of the oil delivery channel, circular truncated cone-shaped plugs are arranged on the annular seats, the plugs are fixed on the inner wall of the oil delivery channel through telescopic springs and telescopic guide posts, and the oil distribution structure for oil distribution is also arranged on the oil delivery channel. According to the oil delivery valve with the oil distribution structure and the processing technology thereof, any plug on two sides of the push plate can be pushed to leave the annular seat through the translational push plate, so that oil entering from the oil inlet enters the oil delivery channel and is discharged from the oil outlet A or the oil outlet B through distribution, and then oil distribution is realized.
Description
Technical Field
The invention relates to the technical field of valves, in particular to an oil delivery valve with an oil distribution structure and a processing technology thereof.
Background
The valve is an important control part in an oil transportation system, is used for changing the section of a passage and the flowing direction of a medium, and has the functions of diversion, cut-off, throttling, check, flow splitting or overflow pressure relief and the like. The fuel delivery valve is divided into gear type fuel delivery valve, diaphragm type fuel delivery valve, plunger type fuel delivery valve and pipeline type fuel delivery valve, etc. the fuel delivery valve can supply fuel oil with enough quantity and certain pressure to fuel injection pump, and its fuel delivery quantity is 3-4 times of full load maximum fuel injection quantity.
When the existing oil delivery valve is used, the existing oil delivery valve is inconvenient to use due to the fact that the existing oil delivery valve does not have an oil liquid distribution structure, and cannot be widely applied to the market.
Disclosure of Invention
The invention aims to provide an oil delivery valve with an oil distribution structure and a processing technology thereof, wherein any plug on two sides of a push plate can be pushed to leave an annular seat through the translational push plate, so that oil entering from an oil inlet enters an oil delivery channel and then is discharged from an oil outlet A or an oil outlet B through distribution, and then oil distribution is realized.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an oil delivery valve with fluid distribution structure, includes valve body and valve gap, the valve gap adopts the bolt fastening on the valve body, the inboard of valve body is provided with the oil delivery passageway, the middle-end of oil delivery passageway is provided with the oil inlet, the valve body is worn out to the oil inlet, the both ends of oil delivery passageway are provided with oil-out A and oil-out B respectively, oil-out A and oil-out B all wear out the valve body, the annular seat of symmetric distribution is installed to the inner wall of oil delivery passageway, be provided with the end cap that is the round platform form on the annular seat, the end cap passes through expanding spring and flexible guide post to be fixed on the inner wall of oil delivery passageway, still be provided with the fluid distribution structure that is used for fluid distribution.
Further, fluid distribution structure includes lead screw, guide bar, slide and push pedal, the both ends of lead screw are all installed on the annular seat through the bearing, lead screw threaded connection has the slide, the slide is still installed on the guide bar, the both ends of guide bar are all installed on the annular seat, install the push pedal that is used for promoting the end cap to remove on the slide, the push pedal is located between the end cap of symmetric distribution.
Furthermore, the oil distribution structure comprises a bevel gear A, a bevel gear B, a driving shaft and a case, wherein the bevel gear A is installed at one end of the screw rod through a spline, the bevel gear A is meshed with the bevel gear B, the bevel gear B is installed on the driving shaft through a spline, and the driving shaft is installed on the case through a bearing.
Furthermore, one end of the driving shaft penetrates through the valve body and is provided with a handle for driving the push plate to move.
Furthermore, an overflow groove used for installing a plug is formed in the annular seat, and the plug seals the overflow groove.
Furthermore, the groove surface of the overflow groove is an inclined surface, and the diameter of the notch of the overflow groove is reduced from large to small.
According to another aspect of the present invention, there is provided a process for manufacturing an oil delivery valve having an oil distribution structure, including the steps of:
s1: after the bevel gear A is arranged on the screw rod through a spline and the bevel gear B is arranged on the driving shaft through a spline, the meshed bevel gear A and the bevel gear B are arranged in the case together;
s2: a sliding plate is processed on the screw rod and is arranged on the guide rod, and a push plate is arranged on the sliding plate;
s3: after the oil liquid distribution structure is processed, the oil liquid distribution structure is assembled in the oil transportation channel, an annular seat is processed on the inner wall of the oil transportation channel, and a plug installed on the annular seat is fixed on the inner wall of the oil transportation channel through a telescopic spring and a telescopic guide post;
s4: an oil inlet is processed at the middle end of the oil conveying channel, an oil outlet A and an oil outlet B are respectively processed at the two ends of the oil conveying channel, the processed oil conveying channel is installed on the valve body, the valve cover is fixed on the valve body through bolts, and then a handle is processed on a driving shaft extending to the outer side of the valve body.
Compared with the prior art, the invention has the beneficial effects that:
the oil delivery valve with the oil distribution structure and the processing technology thereof have the advantages that when oil needs to be distributed, the driving shaft and the bevel gear B are driven to rotate through the handle, the bevel gear B is meshed with the bevel gear A, the bevel gear B can drive the bevel gear A and the screw rod to rotate along with the bevel gear A in the rotating process, the screw rod can enable the sliding plate to translate under the guiding action of the guide rod in the rotating process, the push plate can enable any plug on two sides of the push plate to be pushed to leave the annular seat through the translating push plate, oil entering from an oil inlet enters the oil delivery channel and then is discharged from the oil outlet A or the oil outlet B through distribution, and accordingly oil distribution is achieved.
Drawings
FIG. 1 is a schematic cross-sectional view of an oil delivery valve having an oil distribution structure according to the present invention;
FIG. 2 is a schematic cross-sectional view of the delivery valve of the present invention with oil dispensed from outlet A;
FIG. 3 is a schematic cross-sectional view of the delivery valve of the present invention with oil dispensed from outlet B;
FIG. 4 is a schematic cross-sectional view of an oil distribution structure disposed on an oil delivery passage according to the present invention;
FIG. 5 is an enlarged view of the invention at A;
FIG. 6 is a cross-sectional view of FIG. 5 of the present invention;
FIG. 7 is a schematic view of the plug of the present invention mounted on an annular seat;
figure 8 is an exploded view of the plug of the present invention mounted on an annular seat.
In the figure: 1. a valve body; 2. a valve cover; 3. an oil delivery passage; 31. an oil inlet; 32. an oil outlet A; 33. an oil outlet B; 34. an annular seat; 341. an overflow trough; 4. a plug; 41. a tension spring; 42. a telescopic guide post; 5. an oil distribution structure; 51. a screw rod; 52. a guide bar; 53. a slide plate; 54. pushing the plate; 55. a bevel gear A; 56. a bevel gear B; 57. a drive shaft; 571. a handle; 58. a case.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an oil delivery valve with an oil distribution structure includes a valve body 1 and a valve cover 2, the valve cover 2 is fixed on the valve body 1 by bolts, an oil delivery channel 3 is disposed on the inner side of the valve body 1, an oil inlet 31 is disposed at the middle end of the oil delivery channel 3, the oil inlet 31 penetrates through the valve body 1, two ends of the oil delivery channel 3 are respectively provided with an oil outlet a32 and an oil outlet B33, both the oil outlet a32 and the oil outlet B33 penetrate through the valve body 1, a symmetrically distributed annular seat 34 is mounted on the inner wall of the oil delivery channel 3, a circular truncated cone shaped plug 4 is disposed on the annular seat 34, an overflow groove 341 for mounting the plug 4 is disposed on the annular seat 34, the plug 4 seals the overflow groove 341, the push plate 54 pushes any plug 4 on both sides of the push plate 54 to leave the annular seat 34, at this time, the plug 4 does not seal the overflow groove 341 again, so that oil entering from the oil inlet 31 enters the, the groove surface of the overflow groove 341 is an inclined surface, the diameter of the notch of the overflow groove 341 is reduced from large to small, the translational push plate 54 can push any plug 4 on two sides of the push plate 54 to leave the annular seat 34, so that oil entering from the oil inlet 31 enters the oil transportation channel 3 and then is discharged from the oil outlet A32 or the oil outlet B33 through distribution, and then oil distribution is realized, the operation is simple, the use is convenient, the oil distribution structure has great market value and wide application prospect, the plug 4 is fixed on the inner wall of the oil transportation channel 3 through the telescopic spring 41 and the telescopic guide post 42, the oil distribution structure 5 for oil distribution is further arranged on the oil transportation channel 3, and oil distribution can be realized through the oil distribution structure 5, so that the oil distribution structure has great market value and wide application prospect.
Referring to fig. 5-8, the oil distribution structure 5 includes a screw rod 51, a guide rod 52, a sliding plate 53 and a push plate 54, both ends of the screw rod 51 are mounted on the annular seat 34 through bearings, the screw rod 51 is connected with the sliding plate 53 through threads, the sliding plate 53 is further mounted on the guide rod 52, both ends of the guide rod 52 are mounted on the annular seat 34, the push plate 54 for pushing the plugs 4 to move is mounted on the sliding plate 53, the push plate 54 is located between the plugs 4 which are symmetrically distributed, the oil distribution structure 5 includes a bevel gear a55, a bevel gear B56, a driving shaft 57 and a case 58, one end of the screw rod 51 is mounted with a bevel gear a55 through splines, the bevel gear a55 is engaged with the bevel gear B56, the bevel gear B56 is mounted on the driving shaft 57 through splines, the driving shaft 57 is mounted on the case 58 through bearings, one end of the driving shaft, the driving shaft 57 and the bevel gear B56 are driven to rotate by the handle 571, the bevel gear B56 is meshed with the bevel gear A55, the bevel gear B56 can drive the bevel gear A55 and the screw rod 51 to rotate along with the bevel gear A55, the screw rod 51 can enable the sliding plate 53 to translate under the guiding action of the guide rod 52 in the rotating process, so that the pushing plate 54 translates along with the sliding plate 54, any plug 4 on two sides of the pushing plate 54 can be pushed by the translating pushing plate 54 to leave the annular seat 34, oil entering from the oil inlet 31 enters the oil conveying channel 3 and then is discharged from the oil outlet A32 or the oil outlet B33 through distribution, and then oil distribution is achieved.
In order to better show the processing flow of the oil delivery valve with the oil distribution structure, the embodiment now provides a processing technology of the oil delivery valve with the oil distribution structure, which includes the following steps:
s1: after the bevel gear a55 is mounted on the screw rod 51 by a spline and the bevel gear B56 is mounted on the drive shaft 57 by a spline, the bevel gear a55 and the bevel gear B56 which are engaged with each other are mounted together in the housing 58;
s2: machining a sliding plate 53 on the screw rod 51, mounting the sliding plate 53 on the guide rod 52, and mounting a push plate 54 on the sliding plate 53;
s3: after the oil distribution structure 5 is processed, the oil distribution structure is assembled in the oil transportation channel 3, an annular seat 34 is processed on the inner wall of the oil transportation channel 3, and a plug 4 arranged on the annular seat 34 is fixed on the inner wall of the oil transportation channel 3 through a telescopic spring 41 and a telescopic guide post 42;
s4: an oil inlet 31 is processed at the middle end of the oil conveying channel 3, an oil outlet A32 and an oil outlet B33 are respectively processed at the two ends of the oil conveying channel 3, the processed oil conveying channel 3 is installed on the valve body 1, the valve cover 2 is fixed on the valve body 1 through bolts, and then a handle 571 is processed on the driving shaft 57 extending to the outer side of the valve body 1.
The working principle is as follows: when oil needs to be distributed, the driving shaft 57 and the bevel gear B56 are driven to rotate through the handle 571, the bevel gear B56 is meshed with the bevel gear A55, the bevel gear B56 can drive the bevel gear A55 and the screw rod 51 to rotate along with the bevel gear A, the screw rod 51 can enable the sliding plate 53 to translate under the guiding action of the guide rod 52 and further enable the push plate 54 to translate along with the screw rod 51 in the rotating process, any plug 4 on two sides of the push plate 54 can be pushed by the translating push plate 54 to leave the annular seat 34, and then the oil entering from the oil inlet 31 enters the oil conveying channel 3 and is discharged from the oil outlet A32 or the oil outlet B33 through distribution, so that oil distribution is achieved.
In summary, according to the oil delivery valve with the oil distribution structure and the processing technology thereof, when oil needs to be distributed, the driving shaft 57 and the bevel gear B56 are driven to rotate by the handle 571, and the bevel gear B56 is meshed with the bevel gear a55, so that the bevel gear B56 can drive the bevel gear a55 and the screw rod 51 to rotate therewith in the rotation process, and the screw rod 51 can enable the sliding plate 53 to translate under the guiding action of the guide rod 52 and further enable the push plate 54 to translate therewith, and the translating push plate 54 can push any one of the plugs 4 at two sides of the push plate 54 to leave the annular seat 34, so that the oil entering from the oil inlet 31 enters the oil delivery channel 3 and then is discharged from the oil outlet a32 or the oil outlet B33 through distribution, thereby realizing oil distribution, being simple in operation and convenient to use, and having great market value and broad application prospects.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. The oil delivery valve with the oil distribution structure is characterized by comprising a valve body (1) and a valve cover (2), wherein the valve cover (2) is fixed on the valve body (1) through bolts, an oil delivery channel (3) is arranged on the inner side of the valve body (1), an oil inlet (31) is formed in the middle end of the oil delivery channel (3), the oil inlet (31) penetrates out of the valve body (1), an oil outlet A (32) and an oil outlet B (33) are respectively formed in two ends of the oil delivery channel (3), the oil outlet A (32) and the oil outlet B (33) both penetrate out of the valve body (1), annular seats (34) which are symmetrically distributed are installed on the inner wall of the oil delivery channel (3), circular truncated cone-shaped plugs (4) are arranged on the annular seats (34), and the plugs (4) are fixed on the inner wall of the oil delivery channel (3) through telescopic springs (41) and telescopic guide columns (42), and the oil delivery channel (3) is also provided with an oil distribution structure (5) for oil distribution.
2. The oil delivery valve with the oil distribution structure according to claim 1, wherein the oil distribution structure (5) comprises a screw rod (51), a guide rod (52), a sliding plate (53) and a pushing plate (54), both ends of the screw rod (51) are mounted on the annular seat (34) through bearings, the screw rod (51) is in threaded connection with the sliding plate (53), the sliding plate (53) is further mounted on the guide rod (52), both ends of the guide rod (52) are mounted on the annular seat (34), the sliding plate (53) is provided with the pushing plate (54) for pushing the plugs (4) to move, and the pushing plate (54) is located between the symmetrically distributed plugs (4).
3. The oil delivery valve with oil distribution structure according to claim 2, wherein the oil distribution structure (5) further comprises a bevel gear a (55), a bevel gear B (56), a drive shaft (57) and a case (58), the bevel gear a (55) is spline-mounted at one end of the screw rod (51), the bevel gear a (55) is engaged with the bevel gear B (56), the bevel gear B (56) is spline-mounted on the drive shaft (57), and the drive shaft (57) is bearing-mounted on the case (58).
4. The oil delivery valve with oil distribution structure of claim 3, wherein one end of the driving shaft (57) penetrates through the valve body (1) and is provided with a handle (571) for driving the push plate (54) to move.
5. The oil delivery valve with the oil distribution structure according to claim 1, wherein the annular seat (34) is provided with an overflow groove (341) for installing the plug (4), and the plug (4) seals the overflow groove (341).
6. The oil delivery valve with an oil distribution structure according to claim 5, wherein the groove surface of the overflow groove (341) is an inclined surface, and the diameter of the notch of the overflow groove (341) is gradually reduced.
7. A process for manufacturing an oil delivery valve having an oil distribution structure according to any one of claims 1 to 6, comprising the steps of:
s1: after a bevel gear A (55) is mounted on a screw rod (51) through a spline and a bevel gear B (56) is mounted on a driving shaft (57) through a spline, the meshed bevel gear A (55) and bevel gear B (56) are mounted in a case (58) together;
s2: machining a sliding plate (53) on the screw rod (51), installing the sliding plate (53) on the guide rod (52), and installing a push plate (54) on the sliding plate (53);
s3: after the oil liquid distribution structure (5) is processed, the oil liquid distribution structure is assembled in the oil transportation channel (3), an annular seat (34) is processed on the inner wall of the oil transportation channel (3), and a plug (4) installed on the annular seat (34) is fixed on the inner wall of the oil transportation channel (3) through a telescopic spring (41) and a telescopic guide column (42);
s4: an oil inlet (31) is machined at the middle end of an oil conveying channel (3), an oil outlet A (32) and an oil outlet B (33) are respectively machined at the two ends of the oil conveying channel (3), the machined oil conveying channel (3) is installed on a valve body (1), a handle (571) is machined on a driving shaft (57) extending to the outer side of the valve body (1) after a valve cover (2) is fixed on the valve body (1) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010773011.9A CN111946868B (en) | 2020-08-04 | 2020-08-04 | Oil delivery valve with oil distribution structure and machining process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010773011.9A CN111946868B (en) | 2020-08-04 | 2020-08-04 | Oil delivery valve with oil distribution structure and machining process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111946868A true CN111946868A (en) | 2020-11-17 |
| CN111946868B CN111946868B (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010773011.9A Active CN111946868B (en) | 2020-08-04 | 2020-08-04 | Oil delivery valve with oil distribution structure and machining process thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110289A1 (en) * | 1982-12-06 | 1984-06-13 | Deere & Company | Equalizing valve |
| KR20100027336A (en) * | 2008-09-02 | 2010-03-11 | 최창현 | 3-way valve |
| CN202032129U (en) * | 2011-03-25 | 2011-11-09 | 卓开挺 | Three-way check valve for adsorption dryer |
| CN204852731U (en) * | 2015-07-08 | 2015-12-09 | 福建省海洋阀门科技有限公司 | Double check valve tee bend structure |
| CN108167478A (en) * | 2017-12-08 | 2018-06-15 | 长沙德科投资管理咨询有限公司 | A kind of screw propelling three-way valve |
| CN210566446U (en) * | 2019-10-10 | 2020-05-19 | 南京科沭智能科技有限公司 | Linkage switch three-way valve |
-
2020
- 2020-08-04 CN CN202010773011.9A patent/CN111946868B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0110289A1 (en) * | 1982-12-06 | 1984-06-13 | Deere & Company | Equalizing valve |
| KR20100027336A (en) * | 2008-09-02 | 2010-03-11 | 최창현 | 3-way valve |
| CN202032129U (en) * | 2011-03-25 | 2011-11-09 | 卓开挺 | Three-way check valve for adsorption dryer |
| CN204852731U (en) * | 2015-07-08 | 2015-12-09 | 福建省海洋阀门科技有限公司 | Double check valve tee bend structure |
| CN108167478A (en) * | 2017-12-08 | 2018-06-15 | 长沙德科投资管理咨询有限公司 | A kind of screw propelling three-way valve |
| CN210566446U (en) * | 2019-10-10 | 2020-05-19 | 南京科沭智能科技有限公司 | Linkage switch three-way valve |
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| Publication number | Publication date |
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| CN111946868B (en) | 2022-08-02 |
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