CN111425646A - Multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device - Google Patents
Multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device Download PDFInfo
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- CN111425646A CN111425646A CN202010138374.5A CN202010138374A CN111425646A CN 111425646 A CN111425646 A CN 111425646A CN 202010138374 A CN202010138374 A CN 202010138374A CN 111425646 A CN111425646 A CN 111425646A
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- power
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- hand wheel
- stroke
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/05—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation
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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
- F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
- H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
- H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention belongs to the technical field of electric actuating mechanisms, and particularly relates to a multi-power manual reset direct-drive type straight-stroke rapid cutting-off actuating device which comprises a main box body, wherein a power mechanism, a power switching mechanism, a transmission system and a straight line output system are arranged on the main box body; the power mechanism drives the linear output system to realize linear stroke output through the transmission system; the power mechanism comprises an electric drive system and a hand wheel operating system; the power switching mechanism is used for realizing switching between the electric drive system and the hand wheel operation system. The invention simplifies the structure of the electric actuator, optimizes the use process of the electric actuator, improves the reliability of the system, improves the working efficiency of the electric actuator, reduces the energy consumption of the electric actuator, and is beneficial to realizing remote intelligent control and monitoring an oil-gas system in real time.
Description
Technical Field
The invention belongs to the technical field of electric actuating mechanisms, and particularly relates to a multi-power manual reset direct-drive type straight-stroke quick cutting actuating device.
Background
With the rapid development of pipeline construction in China, the necessity of realizing the localization of key equipment of oil and gas pipelines is increasingly urgent. The localization of key equipment of the oil and gas pipeline is not only a national requirement, but also a requirement for reducing construction and operation costs of oil and gas transportation enterprises, and the localization of the key equipment of the oil and gas pipeline has important significance for reducing engineering cost, breaking monopoly and price barriers of foreign products, developing national industries and promoting the improvement of equipment levels of the oil and gas pipeline.
In recent years, with the increasing safety requirements in the process of automation control, the safety requirements of large-diameter valves in petroleum and petrochemical systems are urgent. The electric actuator is used as a terminal actuating mechanism of the large-caliber valve control system, a power source of the electric actuator is from an electric power system, and when the electric power system is powered off due to accidents or other reasons, the electric actuator cannot adjust the valve to a safety demand position, so that casualties and property loss are caused.
The large-torque quick turn-off device used in the market at present mainly comprises a pneumatic actuator, an electro-hydraulic actuator and the like, but the executing device has the following defects that ① electro-hydraulic actuator needs a matched hydraulic system, the size is large, the maintenance work is difficult, and the price is high, ② pneumatic actuator has complex air path laying work and has the risk of air leakage, ③ causes the easy failure of the electro-hydraulic and pneumatic system and low stability under extreme conditions, ④ uses a nut as a stroke output end, the processing requirement on the nut is increased, ⑤ prime movers only have a single motor, and the system can be paralyzed under the condition of motor failure.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a multi-power manual reset direct-drive type straight-stroke rapid cutting-off executing device, which applies the ideas of 'dispersed multi-power' and 'manual reset' to the traditional electric actuator, thereby simplifying the structure of the electric actuator, optimizing the use process of the electric actuator, improving the reliability of the system, improving the working efficiency of the electric actuator, reducing the energy consumption of the electric actuator, being beneficial to realizing remote intelligent control and monitoring an oil-gas system in real time.
The technical scheme for solving the problems is as follows: a multi-power manual reset direct-drive type straight-stroke rapid cutting-off execution device is characterized in that:
comprises a main box body and a plurality of main box bodies,
the main box body is provided with a power mechanism, a power switching mechanism, a transmission system and a linear output system;
the power mechanism drives the linear output system to realize linear stroke output through the transmission system;
the power mechanism comprises an electric drive system and a hand wheel operating system;
the power switching mechanism is used for realizing switching between the electric drive system and the hand wheel operation system.
Preferably, the power switching mechanism comprises a sliding sleeve, a shifting fork is mounted on the outer side of the sliding sleeve, and the shifting fork is controlled by a shifting fork operating lever.
Preferably, the electric drive system includes a first servo motor and a second servo motor symmetrically distributed on both sides of the main casing.
Preferably, the transmission system comprises a motor worm shaft, and two ends of the motor worm shaft are respectively connected with power output ends of the first servo motor and the second servo motor;
the motor worm shaft transmits power to the transmission worm wheel through the worm gear mechanism, and the transmission worm wheel is sleeved on the transmission sleeve in an empty mode;
one side of the transmission worm wheel is jointed with the sliding sleeve through a tooth groove, and the other side of the transmission worm wheel is axially positioned on the transmission sleeve through a round nut;
the inner part of the transmission sleeve is connected with the nut through the spline, the end part of the transmission sleeve is supported on the main box body through the first bearing, the inner part of the nut is provided with a screw shaft, and the end part of the nut is arranged on the main box body through a flange cover and a thrust bearing.
Preferably, the transmission system further comprises a hand wheel transmission sleeve, the hand wheel transmission sleeve is sleeved on the transmission sleeve and the screw shaft in an empty mode, and the hand wheel transmission sleeve can be connected with the sliding sleeve through a tooth groove to transmit torque.
Preferably, the first servo motor is mounted on the main box through a first servo motor mounting seat, and the second servo motor is mounted on the main box through a second servo motor mounting seat.
Preferably, a first servo band-type brake system is installed between the first servo motor and the first servo motor installation seat; and a second servo band-type brake system is arranged between the second servo motor and the second servo motor mounting seat.
Preferably, the handwheel operating system comprises a handwheel, and the handwheel is arranged on one side of a handwheel transmission sleeve through a square surface.
Preferably, a screw shaft protecting sleeve for protecting the screw shaft is mounted on the outer side of the hand wheel.
Preferably, the linear stroke output of the linear output system is realized by the axial movement of the screw shaft, and the axial guiding of the screw shaft is realized by the teeth on the flange cover.
The invention has the advantages that:
(1) the invention applies the idea of 'dispersed multi-power' to a multi-rotation quick cut-off electric actuating mechanism which can manually reset dispersed multi-power servo direct drive control, firstly, two servo direct drive motors with the same rotor are adopted for driving, and the unbalanced stress caused by the traditional single motor can be avoided; secondly, when one servo motor fails, the other servo motor is allowed to run in an overload mode for a short time, normal operation of an oil-gas system is guaranteed, and time is won for maintenance; finally, two coaxial motors are adopted, so that the actuator is driven more efficiently and economically;
(2) the invention applies the idea of 'servo electric direct drive' to a multi-rotation rapid cut-off electric actuating mechanism which can be manually reset, dispersed and controlled by multi-power servo direct drive, and combines the stator shafts of two servo motors and the worm shaft for transmission into a whole, thereby saving the traditional coupling system and leading the structure of the actuator to be simple and compact;
(3) the invention designs an actuating mechanism capable of being manually reset, when an electric power system is powered off due to an accident or other reasons under the condition that a valve connected with the actuating mechanism is opened, an electromagnetic valve is powered off and braked, a servo motor is in unpowered output, automatic and manual control switching can be realized through a shifting fork device, a hand wheel is reversely rotated, a lead screw is pushed by a lead screw nut system, so that the valve is closed, and casualties and property loss are avoided.
Drawings
FIG. 1 is an overall three-dimensional view of the present invention;
FIG. 2 is a cross-sectional view of motor worm gear shaft 1/4 of the present invention;
FIG. 3 is a cross-sectional view of the handwheel operating system 1/4 of the present invention;
fig. 4 is a linear output system of the manual-electric switching system of the present invention.
Wherein: 1. the servo motor comprises a main box body, 2, a first servo motor, 3, a second servo motor, 4, a main box body cover, 5, an electric system control box, 6, a hand wheel operation system, 7, an angle rotation output system, 8, a motor worm shaft, 9, a first servo motor mounting seat, 10, a second servo motor mounting seat, 11, a first servo band-type brake system, 12, a second servo band-type brake system, 13, a transmission worm wheel, 14, a transmission sleeve, 15, a sliding sleeve, 16, a round nut, 17, a nut, 18, a first bearing, 19, a screw shaft, 20, a flange cover, 21, a thrust bearing, 22, a hand wheel transmission sleeve, 23, a hand wheel, 24, a second bearing, 25, a transparent cover, 26, a screw shaft protective sleeve, 27, a shifting fork, 28 and a shifting fork.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
As shown in fig. 1, a multi-power manual reset direct-drive straight-stroke fast cutting-off execution device comprises a main box body 1, wherein a first servo motor 2 and a second servo motor 3 which are identical in structure and symmetrically distributed are arranged on two sides of the main box body respectively, a main box body cover 4 is arranged on the top of the main box body 1, an electric system control box 5 is arranged on the main box body cover 4, and a hand wheel operation system 6 and a linear output system 7 are arranged on the other two sides of the main box body cover.
As shown in fig. 2, a motor worm shaft 8 is installed inside the main housing 1, and a first servo motor 2 and a second servo motor 3 are respectively installed at two ends of the motor worm shaft 8. The first servo motor 2 is installed on the main box body 1 through a first servo motor installation seat 9, and the second servo motor 3 is installed on the main box body 1 through a second servo motor installation seat 10. A first servo band-type brake system 11 is arranged between the first servo motor 2 and the first servo motor mounting seat 9; a second servo band-type brake system 12 is arranged between the second servo motor 3 and the second servo motor mounting seat 10. The motor worm shaft 8 transmits power to the transmission worm wheel 13 through a worm gear mechanism, the transmission worm wheel 13 is sleeved on a transmission sleeve 14 in an empty mode, the left side of the transmission worm wheel is connected with a sliding sleeve 15 through a tooth groove, the sliding sleeve 15 is internally connected with the transmission sleeve 14 through a sliding spline and can axially move on the transmission sleeve 14, the right side of the transmission worm wheel is axially positioned on the transmission sleeve 14 through a round nut 16, the inside of the transmission sleeve 14 is connected with a nut 17 through a spline, the end part of the transmission sleeve 14 is supported on the main box body 1 through a first bearing 18, a screw shaft 19 is installed inside the nut 17, and the end part of the nut 17 is installed on the main box body 1 through a flange cover. And a hand wheel operating system 6 is arranged on the other side of the sliding sleeve 15.
As shown in fig. 3 and 4, the handwheel operating system 6 includes a handwheel transmission sleeve 22 and a handwheel 23, the handwheel transmission sleeve 22 is loosely sleeved on the transmission sleeve 14 and the screw shaft 19, the outer circle is supported on the main case 1 via a second bearing 24, the other side of the second bearing 24 is fixed on the main case 1 via a transparent cover 25, and the handwheel 23 is installed on the other side of the handwheel transmission sleeve 22 via a square surface. And a screw shaft protective sleeve 26 for protecting the screw shaft 17 is arranged on the outer side of the hand wheel 23. A shifting fork 27 is arranged on the outer side of the sliding sleeve 15, the shifting fork 27 is controlled by a shifting fork operating lever 28, and the shifting fork operating lever 28 is arranged on the main box body 1. The linear output system 7 is mainly realized by the axial movement of the screw shaft 17, and the axial guiding of the screw shaft 17 is realized by the teeth on the flange cover 20.
The working principle of the invention is as follows:
(1) the invention adopts the specific principle of the direct stroke rapid cut-off electric execution of the dispersed multi-power servo direct drive control as follows:
the shifting fork 27 is pushed to one side of the transmission worm wheel 13, so that the sliding sleeve 15 is connected with the transmission worm wheel 13 through a tooth groove on the sliding sleeve to transmit axial motion; when the servo motors on the two sides drive the motor worm shaft 8 to rotate, the transmission worm wheel 13 rotates, the sliding sleeve 15 transmits power to the transmission sleeve 14 through a spline, and then the nut 17 rotates through the spline; the screw pair converts the circular motion of the screw nut into the linear motion of the screw shaft 19, and performs the linear stroke output;
(2) the specific principle of the manual reset of the invention is as follows:
when the valve connected with the mechanism is opened, if an accident or other reasons cause power failure of a power system, the torque in the servo motor is 0: the shifting fork 29 can be pushed to the end of the hand wheel, so that the sliding sleeve 15 is connected with the hand wheel transmission sleeve 22 through a tooth slot on the sliding sleeve to transmit axial motion; then the hand wheel 23 is rotated reversely, the sliding sleeve 15 transmits the movement to the screw shaft 19 through the same path, so that the screw nut system is reversed, the screw shaft 19 moves reversely, the valve is closed, and casualties and property loss are avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by the present specification and drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a many power type manual reset directly drives formula straight stroke and cuts off final controlling element fast which characterized in that:
comprises a main box body (1),
the main box body (1) is provided with a power mechanism, a power switching mechanism, a transmission system and a linear output system (7);
the power mechanism drives the linear output system (7) to realize linear stroke output through the transmission system;
the power mechanism comprises an electric drive system and a hand wheel operating system (6);
the power switching mechanism is used for switching between an electric drive system and a hand wheel operation system (6).
2. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 1, wherein:
the power switching mechanism comprises a sliding sleeve (15), a shifting fork (27) is installed on the outer side of the sliding sleeve (15), and the shifting fork (27) is controlled through a shifting fork operating rod (28).
3. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 2, wherein:
the electric drive system comprises a first servo motor (2) and a second servo motor (3) which are symmetrically distributed on two sides of a main box body (1).
4. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 3, wherein:
the transmission system comprises a motor worm shaft (8), and two ends of the motor worm shaft (8) are respectively connected with power output ends of the first servo motor (2) and the second servo motor (3);
the motor worm shaft (8) transmits power to the transmission worm wheel (13) through a worm gear mechanism, and the transmission worm wheel (13) is sleeved on the transmission sleeve (14) in an empty way;
one side of the transmission worm wheel (13) is jointed with the sliding sleeve (15) through a tooth groove, and the other side is axially positioned on the transmission sleeve (14) through a round nut (16);
the inner part of the sliding sleeve (15) is connected with the transmission sleeve (14) through a sliding spline and can move axially on the transmission sleeve (14), the inner part of the transmission sleeve (14) is connected with the nut (17) through a spline, the end part of the transmission sleeve is supported on the main box body (1) through the first bearing (18), the inner part of the nut (17) is provided with the screw shaft (19), and the end part of the nut (17) is arranged on the main box body (1) through the flange cover (20) and the thrust bearing (21).
5. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 4, wherein:
the transmission system further comprises a hand wheel transmission sleeve (22), the hand wheel transmission sleeve (22) is sleeved on the transmission sleeve (14) and the screw shaft (19) in an empty mode, and the hand wheel transmission sleeve (22) can be connected with the sliding sleeve (15) through a tooth groove to transmit torque.
6. The multi-power manual reset direct-drive type straight-stroke quick cut-off executing device according to claim 5, characterized in that:
the first servo motor (2) is installed on the main box body (1) through a first servo motor installation seat (9), and the second servo motor (3) is installed on the main box body (1) through a second servo motor installation seat (10).
7. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 6, wherein:
a first servo band-type brake system (11) is arranged between the first servo motor (2) and the first servo motor mounting seat (9); a second servo band-type brake system (12) is arranged between the second servo motor (3) and the second servo motor mounting seat (10).
8. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 7, wherein:
the hand wheel operating system (6) comprises a hand wheel (23), and the hand wheel (23) is installed on one side of the hand wheel transmission sleeve (22) through a square surface.
9. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 8, wherein:
and a screw shaft protective sleeve (26) for protecting the screw shaft (17) is arranged on the outer side of the hand wheel (23).
10. The multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device as claimed in claim 9, wherein:
the linear stroke output of the linear output system (7) is realized by the axial movement of the screw shaft (17), and the axial guide of the screw shaft (17) is realized by the teeth on the flange cover (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010138374.5A CN111425646A (en) | 2020-03-03 | 2020-03-03 | Multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010138374.5A CN111425646A (en) | 2020-03-03 | 2020-03-03 | Multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device |
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| Publication Number | Publication Date |
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| CN111425646A true CN111425646A (en) | 2020-07-17 |
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|---|---|---|---|
| CN202010138374.5A Pending CN111425646A (en) | 2020-03-03 | 2020-03-03 | Multi-power manual reset direct-drive type straight-stroke rapid cut-off execution device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202360854U (en) * | 2011-11-18 | 2012-08-01 | 江苏络科阀门有限公司 | Adjustable straight travel electric actuator for travel mechanical position limitation |
| CN103322269A (en) * | 2013-07-01 | 2013-09-25 | 上海理工大学 | Electric actuating mechanism driven by cylindrical linear motor |
| CN205036941U (en) * | 2015-08-14 | 2016-02-17 | 江苏海博流体控制有限公司 | Electric actuator transmission |
| CN105888398A (en) * | 2016-06-22 | 2016-08-24 | 上海恩坦华汽车门系统有限公司 | Double-motor large-drive-force actuator |
| CN205745553U (en) * | 2015-12-31 | 2016-11-30 | 门得赛特（天津）科技有限公司 | Multi-rotation type electric actuating mechanism |
| CN110185834A (en) * | 2019-06-17 | 2019-08-30 | 中国石油大学(华东) | A kind of underwater complete electric production tree valve actuator of pressure balance type |
-
2020
- 2020-03-03 CN CN202010138374.5A patent/CN111425646A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202360854U (en) * | 2011-11-18 | 2012-08-01 | 江苏络科阀门有限公司 | Adjustable straight travel electric actuator for travel mechanical position limitation |
| CN103322269A (en) * | 2013-07-01 | 2013-09-25 | 上海理工大学 | Electric actuating mechanism driven by cylindrical linear motor |
| CN205036941U (en) * | 2015-08-14 | 2016-02-17 | 江苏海博流体控制有限公司 | Electric actuator transmission |
| CN205745553U (en) * | 2015-12-31 | 2016-11-30 | 门得赛特（天津）科技有限公司 | Multi-rotation type electric actuating mechanism |
| CN105888398A (en) * | 2016-06-22 | 2016-08-24 | 上海恩坦华汽车门系统有限公司 | Double-motor large-drive-force actuator |
| CN110185834A (en) * | 2019-06-17 | 2019-08-30 | 中国石油大学(华东) | A kind of underwater complete electric production tree valve actuator of pressure balance type |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20201116 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petroleum & Chemical Corp. Applicant after: South China branch of Sinopec Sales Co.,Ltd. Applicant after: XI'AN JIAOTONG University Address before: 510620 38-40 tower, A tower, Sinopec building, 191 Sports West Road, Tianhe District, Guangzhou, Guangdong. Applicant before: South China branch of Sinopec Sales Co.,Ltd. Applicant before: XI'AN JIAOTONG University |
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Application publication date: 20200717 |
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