CN104989686B - Hydraulic unit achieving mutual potential energy utilization in pairing manner and driving method thereof - Google Patents
Hydraulic unit achieving mutual potential energy utilization in pairing manner and driving method thereof Download PDFInfo
- Publication number
- CN104989686B CN104989686B CN201510400282.9A CN201510400282A CN104989686B CN 104989686 B CN104989686 B CN 104989686B CN 201510400282 A CN201510400282 A CN 201510400282A CN 104989686 B CN104989686 B CN 104989686B
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- Prior art keywords
- hydraulic
- hydraulic press
- fluid power
- power system
- piston cylinder
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a hydraulic unit achieving mutual potential energy utilization in a pairing manner and a driving manner thereof. The hydraulic unit at least comprises two hydraulic machines which are the first hydraulic machine and the second hydraulic machine. A potential energy balance system and a hydraulic drive system are arranged between the two hydraulic machines. When the first hydraulic machine conducts a fast drop action, a fast return action of the second hydraulic machine is achieved; when the second hydraulic machine conducts a fast drop action, a fast return action of the first hydraulic machine is achieved. The storage and supplementation functions of the potential energy balance system are used for enabling the hydraulic machines conducting the fast return action to acquire the matched hydraulic oil amount. Through real-time mutual utilization of potential energy of the hydraulic machines, an energy conversion link is omitted, and the work efficiency of a hydraulic system is improved.
Description
Technical field
The present invention relates to the driving method of a kind of hydraulic press, particularly to a kind of, with group, form is realized the hydraulic pressure that potential energy mutually utilizes
Unit and type of drive thereof, for realizing the mutual utilization of potential energy between multiple stage hydraulic press, energy-saving and cost-reducing.
Background technology
Along with industrial developing rapidly in global range, energy shortage and problem of environmental pollution are on the rise, with low energy consumption, low dirt
" low-carbon economy " based on dye has become as the focus of global concern.Wherein hydroforming equipment is owing to its consumption is big, energy consumption
Height, efficiency are low, and efficiency is generally 6% to 40%, has been increasingly becoming one of main object of people's common concern.
During hydraulic press work, the quality weight of slide block, inertia are big, and slide block relies on action of gravity and the oil-out choke valve of himself
Regulation, rapid decrease.In decentralization process, gravitional force and the most restriction at valve of kinetic energy are converted into thermal dissipation and arrive
In air.And hydraulic press work is frequently, not only causes substantial amounts of energy dissipation, and add the carbon emission of system, and send out
Exhibition low-carbon economy is runed counter to.
For this situation, Chinese scholars proposes the method that various hydraulic press potential energy recycles.Reclaiming is exactly by hydraulic press
Declining potential energy converting and energy becomes the energy storage being prone to storage in energy-storage travelling wave tube, discharges recycling the most according to the actual needs.
According to the difference of energy storage mode, it is generally divided into Electric energy type, mechanical energy formula and hydraulic energy formula.Focus primarily upon electric power type energy regenerating
The exploitation of system and the utilization of hydraulic secondary component, in electric power type Energy Recovery Technology, due to energy convert experienced by electromotor,
Multiple links such as electronic/electromotor, energy-storage travelling wave tube (battery or super capacitor) and hydraulic pump, it is inefficient that energy is changed.
Although the above method can reach the effect of energy recovery and reuse, but is the increase in the burden of system and answering of control
Polygamy, adds the link of recycling and reuse simultaneously, reduces the efficiency of Energy harvesting.
Summary of the invention
The present invention is for avoiding the weak point existing for above-mentioned prior art, it is provided that it is mutually mutually beneficial that one realizes potential energy with group to form
Hydraulic pressure unit and driving method, by utilizing in real time mutually hydraulic press potential energy, reduce the link of energy conversion, carry
The work efficiency of high hydraulic system.
The present invention solves that technical problem adopts the following technical scheme that
The present invention realizes being structurally characterized in that of hydraulic pressure unit that potential energy mutually utilizes with group to form: described hydraulic pressure unit at least includes
Two groups of hydraulic presses, are the first hydraulic press and the second hydraulic press respectively；And potential-energy balance system and liquid are set between two groups of hydraulic presses
Pressure drive system；
The hydraulic cylinder of described first hydraulic press is made up of first piston cylinder and the first plunger case, the piston rod of described first piston cylinder and
The plunger rod of the first plunger case is connected with the first slider of hydraulic press jointly；First piston cylinder cavity of resorption by oil circuit respectively with described gesture
System can be balanced and fluid power system is connected；First piston cylinder epicoele one tunnel is to be communicated by the first replenishing valve and the first fuel tank,
Another road is to be connected with described fluid power system by the first check valve；The hydraulic control mouth of described first replenishing valve and described hydraulic pressure
Drive system is connected；The conducting direction of described first check valve is to described first hydraulic press by described fluid power system；Institute
State the first plunger case to be connected with described fluid power system；
The hydraulic cylinder of described second hydraulic press is made up of the second piston cylinder and the second plunger case, the piston rod of described second piston cylinder and
The plunger rod of the second plunger case is connected with the second slider of hydraulic press jointly；Second piston cylinder cavity of resorption by oil circuit respectively with described gesture
System can be balanced and fluid power system is connected；Second piston cylinder epicoele one tunnel is to be communicated by the second replenishing valve and the second fuel tank,
Another road is to be connected with described fluid power system by the second check valve；The hydraulic control mouth of described second replenishing valve drives with described hydraulic pressure
Dynamic system is connected；The conducting direction of described second check valve is to described second hydraulic press by described fluid power system；Described
Second plunger case is connected with described fluid power system.
The feature of the driving method that the present invention realizes the hydraulic pressure unit that potential energy mutually utilizes with group to form is:
When the first hydraulic press is in fast fall action, described fluid power system the plunger rod driving described first plunger case is quick
Decline, drive the piston rod rapid decrease of described first slider of hydraulic press and first piston cylinder, discharge with first piston cylinder cavity of resorption
Hydraulic oil, through described potential-energy balance system introducing the second piston cylinder cavity of resorption, promotes described second hydraulic press to realize returning to action with this；
When the second hydraulic press is in fast fall action, described fluid power system the plunger rod driving described second plunger case is quick
Decline, drive the piston rod rapid decrease of described second slider of hydraulic press and the second piston cylinder, discharge with the second piston cylinder cavity of resorption
Hydraulic oil, through described potential-energy balance system introducing first piston cylinder cavity of resorption, promotes described first hydraulic press to realize returning to action with this；
The storage and the supplementary functions that utilize described potential-energy balance system make the hydraulic press being under fast fall action obtain the hydraulic pressure matched
Oil oil mass.
The feature of the driving method that the present invention realizes the hydraulic pressure unit that potential energy mutually utilizes with group to form lies also in: when described first
After hydraulic press and described second hydraulic press complete to drop soon and return to action, close described potential-energy balance system；Described first hydraulic press
With the second hydraulic press under the driving of fluid power system, separate complete in technological requirement compacting, off-load, pressurize and slow
Return each action.
Compared with the prior art, the present invention has the beneficial effect that:
1, hydraulic press is grouping by the present invention so that it is the potential energy that middle hydraulic press drops soon is for the rapid increase of other hydraulic press, real
The trend of the times can directly mutually utilize, the less conversion links of potential energy, decrease energy loss, improve the efficiency of hydraulic system.
2, the present invention is by arranging plunger case for hydraulic press, by the rapid decrease of the flow input tape hydrodynamic press slide of plunger case.
When not against slide block gravity, less flow input can realize the rapid decrease of hydraulic press, reduces the installation of drive system
Power, decreases the energy loss because using choke valve to produce, reduces the carbon emission of system.
3, the present invention group to hydraulic press in compacting action time, by potential-energy balance system close, separate unit hydraulic press complete independently move
Make, reduce the installed power that fluid power system is total, reduce the energy expenditure that hydraulic system drive part produces because of off-load.
Accompanying drawing explanation
Fig. 1 is hydraulic pressure unit structural representation of the present invention；
Label in figure: 1 first hydraulic press, 2 second hydraulic presses, 11 first piston cylinders, 12 first plunger cases, 13 first hydraulic pressure
Machine slide block, 14 first replenishing valves, 15 first fuel tanks, 16 first check valves, 21 second piston cylinders, 22 second plunger cases, 23
Second slider of hydraulic press, 24 second replenishing valves, 25 second fuel tanks, 26 second check valves.
Detailed description of the invention
Seeing Fig. 1, form is realized in the hydraulic pressure unit that potential energy mutually utilizes by the present embodiment with group, and hydraulic pressure unit at least includes two
Group hydraulic press, is the first hydraulic press 1 and the second hydraulic press 2 respectively；And arrange between two groups of hydraulic presses potential-energy balance system and
Fluid power system.
As it is shown in figure 1, the hydraulic cylinder of the first hydraulic press 1 is made up of first piston cylinder 11 and the first plunger case 12, described first
The piston rod of piston cylinder 11 and the plunger rod of the first plunger case 12 are connected with the first slider of hydraulic press 13 jointly；First piston cylinder
Cavity of resorption is connected with described potential-energy balance system and fluid power system respectively by oil circuit；First piston cylinder epicoele one tunnel is to pass through
First replenishing valve 14 communicates with the first fuel tank 15, and another road is to be connected with described fluid power system by the first check valve 16；
The hydraulic control mouth of described first replenishing valve 14 is connected with described fluid power system；The conducting direction of described first check valve 16 is
By described fluid power system to described first hydraulic press 1；Described first plunger case 12 is connected with described fluid power system；
As it is shown in figure 1, the hydraulic cylinder of the second hydraulic press 2 is made up of the second piston cylinder 21 and the second plunger case 22, described second
The piston rod of piston cylinder 21 and the plunger rod of the second plunger case 22 are connected with the second slider of hydraulic press 23 jointly；Second piston cylinder
Cavity of resorption is connected with described potential-energy balance system and fluid power system respectively by oil circuit；Second piston cylinder epicoele one tunnel is to pass through
Second replenishing valve 24 communicates with the second fuel tank 25, and another road is to be connected with described fluid power system by the second check valve 26；
The hydraulic control mouth of described second replenishing valve 24 is connected with described fluid power system；The conducting direction of described second check valve 26 is
By described fluid power system to described second hydraulic press 2；Described second plunger case 22 is connected with described fluid power system.
With group, form realizing the type of drive of the hydraulic pressure unit that potential energy mutually utilizes in the present embodiment is:
When the first hydraulic press 1 is in fast fall action, described fluid power system drive the plunger rod of described first plunger case 12
Rapid decrease, drives described first slider of hydraulic press 13 and the piston rod rapid decrease of first piston cylinder 12, now, utilizes
The negative pressure formed in first piston cylinder epicoele opens the first replenishing valve 14, makes the fluid in the first fuel tank 15 inject first piston cylinder
Epicoele, the hydraulic oil discharged with first piston cylinder cavity of resorption through described potential-energy balance system introducing the second piston cylinder cavity of resorption, drives described
The piston rod rapid increase of the second piston cylinder, and promote the second press slide 23 rapid increase, promote the second hydraulic press to realize with this
Return to action.Meanwhile, the hydraulic control mouth pressure of the second replenishing valve 24 raises, and the second replenishing valve 24 is opened, the second piston cylinder
The hydraulic oil of epicoele flows back into the second fuel tank 25 through replenishing valve 24.
When the second hydraulic press 2 is in fast fall action, described fluid power system drive the plunger rod of described second plunger case 22
Rapid decrease, drives described second slider of hydraulic press 23 and the piston rod rapid decrease of the second piston cylinder 21, now, utilizes
The negative pressure formed in second piston cylinder epicoele opens the second replenishing valve 24, and hydraulic oil flows into described second through described second fuel tank 25
Piston cylinder epicoele；The hydraulic oil discharged with the second piston cylinder cavity of resorption through described potential-energy balance system introducing first piston cylinder cavity of resorption, band
The piston rod rapid increase of dynamic first piston cylinder, and promote described first press slide 13 rapid increase, promote described first with this
Hydraulic press realizes returning to action.Meanwhile, the hydraulic control mouth pressure of the first replenishing valve 14 raises, and the first replenishing valve 14 is opened,
The hydraulic oil of first piston cylinder epicoele flows back into the first fuel tank 15 through the first replenishing valve 14.
First replenishing valve 14 and the second replenishing valve 24 are hydraulic control one-way valve, when the pressure of its hydraulic control mouth is more than unlatching pressure, i.e.
In two-way admittance state.
In the present embodiment, hydraulic pressure unit is to be grouping with two hydraulic presses, under the driving of fluid power system, for first
Be on centre position first piston cylinder 11 and office the first plunger in the first piston cylinder left and right sides in hydraulic press 1
Total cross-sectional area of cylinder 12 should meet the demand of hydraulic press maximum plastic force.Under the traffic driven of fluid power system, two
The setting of total cross-sectional area of the first plunger case 12 is that the speed requirement meeting hydraulic press rapid decrease is as the criterion；For the second liquid
Second piston cylinder 21 and two the second plunger cases 22 in press 2 are also same requirement.
The storage and the supplementary functions that utilize potential-energy balance system make to be in the hydraulic press returned under action and obtain the liquid matched with action
Force feed oil mass.Namely: when the flow of the hydraulic press being in fast fall action is more than being in the hydraulic press demand that returns in action
During flow, potential-energy balance system is memory function, otherwise is to be provided for the hydraulic press returning in action by described fluid power system
Supplement energy.
After described first hydraulic press 1 completes to drop soon and return to action with described second hydraulic press 2, close described potential-energy balance system
System；Described first hydraulic press 1 and the second hydraulic press 2, under the driving of fluid power system, separate complete in technological requirement
Compacting, off-load, pressurize and slow return each action.
The present invention realizes, to form, the hydraulic pressure unit that potential energy mutually utilizes with group, and its hydraulic pressure unit at least includes two groups of hydraulic presses, right
The multiple stage hydraulic press adapted in action beat can realize potential energy utilization each other in the same way.
Claims (1)
1. with group, form is realized the hydraulic pressure unit that potential energy mutually utilizes, it is characterized in that described hydraulic pressure unit at least includes two groups of hydraulic pressure
Machine, is the first hydraulic press (1) and the second hydraulic press (2) respectively；And potential-energy balance system is set between two groups of hydraulic presses and hydraulic pressure drives
Dynamic system；
The hydraulic cylinder of described first hydraulic press (1) is made up of first piston cylinder (11) and the first plunger case (12), described first piston cylinder
(11) piston rod and the plunger rod of the first plunger case (12) are connected with the first slider of hydraulic press (13) jointly；First piston cylinder cavity of resorption
It is connected with described potential-energy balance system and fluid power system respectively by oil circuit；First piston cylinder epicoele one tunnel is by first
Replenishing valve (14) communicates with the first fuel tank (15), and another road is to be connected with described fluid power system by the first check valve (16)；
The hydraulic control mouth of described first replenishing valve (14) is connected with described fluid power system；The conducting direction of described first check valve (16) is
By described fluid power system to described first hydraulic press (1)；Described first plunger case (12) is connected with described fluid power system；
The hydraulic cylinder of described second hydraulic press (2) is made up of the second piston cylinder (21) and the second plunger case (22), described second piston cylinder
(21) piston rod and the plunger rod of the second plunger case (22) are connected with the second slider of hydraulic press (23) jointly；Second piston cylinder cavity of resorption
It is connected with described potential-energy balance system and fluid power system respectively by oil circuit；Second piston cylinder epicoele one tunnel is by second
Replenishing valve (24) communicates with the second fuel tank (25), and another road is to be connected with described fluid power system by the second check valve (26)；Institute
The hydraulic control mouth stating the second replenishing valve (24) is connected with described fluid power system；The conducting direction of described second check valve (26) be by
Described fluid power system is to described second hydraulic press (2)；Described second plunger case (22) is connected with described fluid power system；
Arranging the described driving method that form realizes the hydraulic pressure unit that potential energy mutually utilizes with group is:
When the first hydraulic press (1) is in fast fall action, described fluid power system drive the plunger of described first plunger case (12)
Bar rapid decrease, drives described first slider of hydraulic press (13) and the piston rod rapid decrease of first piston cylinder (11), from first piston
The hydraulic oil that cylinder cavity of resorption is discharged, through described potential-energy balance system introducing the second piston cylinder cavity of resorption, promotes described second hydraulic press (2) with this
Realization returns to action；
When the second hydraulic press (2) is in fast fall action, described fluid power system drive the plunger of described second plunger case (22)
Bar rapid decrease, drives described second slider of hydraulic press (23) and the piston rod rapid decrease of the second piston cylinder (21), from the second piston
The hydraulic oil that cylinder cavity of resorption is discharged, through described potential-energy balance system introducing first piston cylinder cavity of resorption, promotes described first hydraulic press (1) with this
Realization returns to action；
The storage and the supplementary functions that utilize described potential-energy balance system make the hydraulic press being under fast fall action obtain the hydraulic pressure matched
Oil oil mass.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610972704.4A CN106321535B (en) | 2015-07-08 | 2015-07-08 | The hydraulic pressure unit that potential energy is mutually utilized is realized to form with group |
| CN201510400282.9A CN104989686B (en) | 2015-07-08 | 2015-07-08 | Hydraulic unit achieving mutual potential energy utilization in pairing manner and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510400282.9A CN104989686B (en) | 2015-07-08 | 2015-07-08 | Hydraulic unit achieving mutual potential energy utilization in pairing manner and driving method thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610972704.4A Division CN106321535B (en) | 2015-07-08 | 2015-07-08 | The hydraulic pressure unit that potential energy is mutually utilized is realized to form with group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104989686A CN104989686A (en) | 2015-10-21 |
| CN104989686B true CN104989686B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510400282.9A Expired - Fee Related CN104989686B (en) | 2015-07-08 | 2015-07-08 | Hydraulic unit achieving mutual potential energy utilization in pairing manner and driving method thereof |
| CN201610972704.4A Active CN106321535B (en) | 2015-07-08 | 2015-07-08 | The hydraulic pressure unit that potential energy is mutually utilized is realized to form with group |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610972704.4A Active CN106321535B (en) | 2015-07-08 | 2015-07-08 | The hydraulic pressure unit that potential energy is mutually utilized is realized to form with group |
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| CN (2) | CN104989686B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108248089B (en) * | 2016-11-30 | 2019-07-19 | 合肥工业大学 | A kind of control method of double execution unit hydraulic presses |
| CN107269600A (en) * | 2017-07-31 | 2017-10-20 | 中国重型机械研究院股份公司 | A kind of new fuel tank air inlet and outlet device and method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4309641A1 (en) * | 1992-03-27 | 1993-09-30 | Rexroth Mannesmann Gmbh | Hydraulic drive for sheet metal forming press - has first hydrostatic machine to regulate pressure and second hydrostatic machine to expel pressure medium from hydraulic cylinder |
| DE4218952B4 (en) * | 1992-06-10 | 2005-03-03 | Bosch Rexroth Ag | Hydraulic drive for a press, in particular for a sheet metal forming press |
| CN2632368Y (en) * | 2003-07-10 | 2004-08-11 | 天津市天锻压力机有限公司 | Precision numerical control stretching hydropress shaping correcting controller |
| CN101307685A (en) * | 2008-07-09 | 2008-11-19 | 丁长良 | Long stroke hydraulic pumping unit |
| CN102235159A (en) * | 2010-04-28 | 2011-11-09 | 陈万仁 | Hydraulic energy-saving multi-well pumping unit |
| CN102363375A (en) * | 2011-06-30 | 2012-02-29 | 天津市天锻压力机有限公司 | Fast energy-saving single-action hydraulic machine |
-
2015
- 2015-07-08 CN CN201510400282.9A patent/CN104989686B/en not_active Expired - Fee Related
- 2015-07-08 CN CN201610972704.4A patent/CN106321535B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106321535A (en) | 2017-01-11 |
| CN106321535B (en) | 2017-11-07 |
| CN104989686A (en) | 2015-10-21 |
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Granted publication date: 20170111 Termination date: 20190708 |