CN104100608A - Standby device used for potential energy recovery system failure and application method of standby device - Google Patents
Standby device used for potential energy recovery system failure and application method of standby device Download PDFInfo
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- CN104100608A CN104100608A CN201310118171.XA CN201310118171A CN104100608A CN 104100608 A CN104100608 A CN 104100608A CN 201310118171 A CN201310118171 A CN 201310118171A CN 104100608 A CN104100608 A CN 104100608A
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Abstract
The invention relates to a standby device used for potential energy recovery system failure and an application method of the standby device. The device is characterized in that the rod cavity port of a first potential energy recovery cylinder is connected with the B port and the A port of a first electromagnetic directional valve and the B port and the A port of a second electromagnetic directional valve; the rodless cavity port of the first potential energy recovery cylinder is connected with the A port and the B port of the first electromagnetic directional valve, the A port and the B port of the second electromagnetic directional valve and the oil inlet of a first ball valve; the P port of the second electromagnetic directional valve and the P port of a fourth electromagnetic directional valve are communicated, and are connected with the rodless cavity port of a lift cylinder; the T port of the second electromagnetic directional valve and the T port of the fourth electromagnetic directional valve are communicated with the rod cavity port of the lift cylinder, and are connected with an oil tank; the rod cavity port of a second potential energy recovery cylinder is connected with the B port and the A port of a third electromagnetic directional valve and the B port and the A port of the fourth electromagnetic directional valve; the rodless cavity port of the second potential energy recovery cylinder is connected with the A port and the B port of the third electromagnetic directional valve, the A port and the B port of the fourth electromagnetic directional valve and the oil inlet of a second ball valve. The method comprises the following steps: determining required maximum flow when the first potential energy recovery cylinder and the second potential energy recovery cylinder rise; determining the power of the drive motor of a first standby pump and the power of the drive motor of a second standby pump. The standby device disclosed by the invention still can normally run when the potential energy recovery system is abnormal.
Description
Technical field
The present invention relates to a kind of stand-by provision and using method thereof, stand-by provision and using method thereof during specifically for potential energy recovery system fault.
Background technique
Lifting and walking machinery have accounted for very large proportion at industry-by-industry, and its major part all belongs to heavy duty, continuous production status, and these equipment are driven by lifting jar while rising, when decline by conducting oneself with dignity or power adds auxiliary back pressure.The gravitational potential energy major part discharging in decline process is converted into heat and consumed in vain, and this portion of energy has accounted for 50% to 70% of total energy consumption while lifting, even higher.Walking beam furnace, all there is identical problem in walking beam transporter, walking beam cooler, rise-fall type weighing-appliance, hydraulic lift etc.: in decline process, most of gravitational potential energy is consumed in vain, has caused the significant wastage of the energy.Potential energy recovery system can effectively reclaim the part gravitational potential energy in these liftings and walking machinery decline process, and for promote next time, can realize saving energy 40%～60%.But at any production unit, " the absolute stability operation " of guaranteeing equipment is to guarantee normal primary prerequisite of producing, as breaks down, and can affect the operation of equipment.
Summary of the invention
The present invention is intended to overcome the defect of prior art, and a kind of stand-by provision and using method thereof during for potential energy recovery system fault is provided, and can guarantee that still can normally move appears when abnormal in potential energy recovery system.
In order to solve the problems of the technologies described above, the present invention is achieved in that
A stand-by provision during for potential energy recovery system fault, is characterized in that: it comprises that potential energy recovery system, fuel tank, system main pump, lifting jar, the first potential energy reclaim cylinder, the second potential energy reclaims cylinder, the first solenoid directional control valve, the second solenoid directional control valve, the 3rd solenoid directional control valve, the 4th solenoid directional control valve, the first ball valve, the second ball valve, the first one-way valve, the second one-way valve, the 3rd one-way valve, safety valve, the first stand by pump and the second stand by pump;
The inlet port of system main pump, the first stand by pump and the second stand by pump is connected with fuel tank, the oil outlet of system main pump, the first stand by pump and the second stand by pump is connected respectively the filler opening of the 3rd one-way valve, the first one-way valve and the second one-way valve, the oil outlet of the 3rd one-way valve, the first one-way valve and the second one-way valve is communicated with and is connected with the rodless cavity hydraulic fluid port of lifting jar, the filler opening of safety valve connects the oil outlet of the 3rd one-way valve, and the oil outlet of safety valve connects fuel tank;
The rod chamber hydraulic fluid port that the first potential energy reclaims cylinder connects respectively the B mouth of the first solenoid directional control valve and the A mouth of the second solenoid directional control valve, and the rodless cavity hydraulic fluid port of the first potential energy recovery cylinder connects respectively A mouth, the B mouth of the second solenoid directional control valve and the filler opening of the first ball valve of the first solenoid directional control valve; T mouth, the T mouth of the 3rd solenoid directional control valve and the rod chamber hydraulic fluid port of lifting jar of the first solenoid directional control valve are communicated with and are connected with fuel tank; The P mouth of the P mouth of the second solenoid directional control valve and the 4th solenoid directional control valve is communicated with and is connected with the rodless cavity hydraulic fluid port of lifting jar, and the T mouth of the second solenoid directional control valve is communicated with and is connected with fuel tank with the T mouth of the 4th solenoid directional control valve and the rod chamber hydraulic fluid port of lifting jar; The oil outlet of the first ball valve connects potential energy recovery system;
The rod chamber hydraulic fluid port that the second potential energy reclaims cylinder connects respectively the B mouth of the 3rd solenoid directional control valve and the A mouth of the 4th solenoid directional control valve, and the rodless cavity hydraulic fluid port of the second potential energy recovery cylinder connects respectively A mouth, the B mouth of the 4th solenoid directional control valve and the filler opening of the second ball valve of the 3rd solenoid directional control valve; The oil outlet of the second ball valve connects potential energy recovery system.
Described stand-by provision during for potential energy recovery system fault, is characterized in that: described the first stand by pump and the second stand by pump are gear pump, plunger pump or vane pump.
The using method of described stand-by provision during for potential energy recovery system fault, is characterized in that, comprises the steps:
Step 1: the maximum operational speed while rising according to lifting jar and the first potential energy reclaim specification and the quantity of cylinder, the second potential energy recovery cylinder, determine required peak rate of flow when the first potential energy reclaims cylinder, the second potential energy recovery cylinder rising, to determine the first stand by pump and the second pump size for subsequent use:
（1）
（2）
In formula (1):
Q
1max: required peak rate of flow when the first potential energy reclaims cylinder rising;
N
1: the first potential energy reclaims the quantity of cylinder;
D
1: the first potential energy reclaims cylinder rodless cavity diameter;
V
max: maximum operational speed when lifting jar rises;
In formula (2):
Q
2max: required peak rate of flow when the second potential energy reclaims cylinder rising
N
2: the second potential energy reclaims the quantity of cylinder;
D
2: the second potential energy reclaims cylinder rodless cavity diameter;
Required peak rate of flow Q while reclaiming cylinder and the rising of the second potential energy recovery cylinder according to the first potential energy
1max, Q
2maxcan confirm first, second pump size for subsequent use.
Step 2: according to Q
1max, Q
2maxdetermine the drive motor power of the first stand by pump, the second stand by pump with system pressure:
（3）
（4）
In formula (3):
P
1max: drive the required maximum motor power of the first stand by pump;
η
1: the efficiency of the first stand by pump;
P: system works pressure, its span is between 13～20MPa;
In formula (4):
P
2max: drive the required maximum motor power of the second stand by pump;
η
2: the efficiency of the second stand by pump;
According to the P calculating
1max, P
2maxselect the first stand by pump and the suitable drive motor of the second stand by pump.
The using method of described stand-by provision during for potential energy recovery system fault, is characterized in that: in step 2, and η
1, η
2get 0.8～0.9.
The invention has the beneficial effects as follows: can guarantee that abnormal and some unforeseeable fault appears in potential energy recovery system and while temporarily quitting work, equipment still can normally move, and does not affect production.
Brief description of the drawings
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1: a kind of stand-by provision during for potential energy recovery system fault, it comprises that potential energy recovery system 9, fuel tank 10, system main pump 11, lifting jar 12, the first potential energy reclaim cylinder 13, the second potential energy reclaims cylinder 14, the first solenoid directional control valve 1, the second solenoid directional control valve 2, the 3rd solenoid directional control valve 3, the 4th solenoid directional control valve 4, the first ball valve 5, the second ball valve 6, the first one-way valve 17, the second one-way valve 18, the 3rd one-way valve 16, safety valve 15, the first stand by pump 7 and the second stand by pump 8;
The inlet port 21 of system main pump, the inlet port 25 of the first stand by pump is connected with fuel tank with the inlet port 29 of the second stand by pump, the oil outlet 22 of system main pump, the oil outlet 26 of the first stand by pump and the oil outlet 30 of the second stand by pump are connected respectively the filler opening 23 of the 3rd one-way valve, the filler opening 27 of the first one-way valve and the filler opening 31 of the second one-way valve, the oil outlet 24 of the 3rd one-way valve, the oil outlet 28 of the first one-way valve is communicated with the oil outlet 32 of the second one-way valve and is connected with the rodless cavity hydraulic fluid port of lifting jar, the filler opening 33 of safety valve connects the oil outlet of the 3rd one-way valve, the oil outlet 34 of safety valve connects fuel tank,
The rod chamber hydraulic fluid port that the first potential energy reclaims cylinder connects respectively the B mouth of the first solenoid directional control valve and the A mouth of the second solenoid directional control valve, and the rodless cavity hydraulic fluid port of the first potential energy recovery cylinder connects respectively A mouth, the B mouth of the second solenoid directional control valve and the filler opening 35 of the first ball valve of the first solenoid directional control valve; T mouth, the T mouth of the 3rd solenoid directional control valve and the rod chamber hydraulic fluid port of lifting jar of the first solenoid directional control valve are communicated with and are connected with fuel tank; The P mouth of the P mouth of the second solenoid directional control valve and the 4th solenoid directional control valve is communicated with and is connected with the rodless cavity hydraulic fluid port of lifting jar, and the T mouth of the second solenoid directional control valve is communicated with and is connected with fuel tank with the T mouth of the 4th solenoid directional control valve and the rod chamber hydraulic fluid port of lifting jar; The oil outlet 36 of the first ball valve connects potential energy recovery system;
The rod chamber hydraulic fluid port that the second potential energy reclaims cylinder connects respectively the B mouth of the 3rd solenoid directional control valve and the A mouth of the 4th solenoid directional control valve, and the rodless cavity hydraulic fluid port of the second potential energy recovery cylinder connects respectively A mouth, the B mouth of the 4th solenoid directional control valve and the filler opening 37 of the second ball valve of the 3rd solenoid directional control valve; The oil outlet 38 of the second ball valve connects potential energy recovery system.Described the first stand by pump and the second stand by pump are gear pump, plunger pump or vane pump.
First, second, third, fourth solenoid directional control valve can also be valve or the valve group with identical function.
A using method for stand-by provision during for potential energy recovery system fault, is characterized in that, comprises the steps:
Step 1: the maximum operational speed while rising according to lifting jar and the first potential energy reclaim specification and the quantity of cylinder, the second potential energy recovery cylinder, determine required peak rate of flow when the first potential energy reclaims cylinder, the second potential energy recovery cylinder rising, to determine the first stand by pump and the second pump size for subsequent use:
（1）
（2）
In formula (1):
Q
1max: required peak rate of flow when the first potential energy reclaims cylinder rising;
N
1: the first potential energy reclaims the quantity of cylinder;
D
1: the first potential energy reclaims cylinder rodless cavity diameter;
V
max: maximum operational speed when lifting jar rises;
In formula (2):
Q
2max: required peak rate of flow when the second potential energy reclaims cylinder rising
N
2: the second potential energy reclaims the quantity of cylinder;
D
2: the second potential energy reclaims cylinder rodless cavity diameter;
Required peak rate of flow Q while reclaiming cylinder and the rising of the second potential energy recovery cylinder according to the first potential energy
1max, Q
2maxcan confirm first, second pump size for subsequent use.
Step 2: according to Q
1max, Q
2maxdetermine the drive motor power of the first stand by pump, the second stand by pump with system pressure:
（3）
（4）
In formula (3):
P
1max: drive the required maximum motor power of the first stand by pump;
η
1: the efficiency of the first stand by pump;
P: system works pressure, its span is between 13～20MPa;
In formula (4):
P
2max: drive the required maximum motor power of the second stand by pump;
η
2: the efficiency of the second stand by pump;
According to the P calculating
1max, P
2maxselect the first stand by pump and the suitable drive motor of the second stand by pump.
The using method of described stand-by provision during for potential energy recovery system fault, is characterized in that: in step 2, and η
1, η
2get 0.8～0.9.
P mouth in above-mentioned solenoid directional control valve is filler opening, and T mouth is return opening, and A, B mouth are respectively the actuator port that connects actuator or other valves.
The first potential energy reclaims cylinder and switches to potential energy recovery cylinder:
The coil " b " of the first solenoid directional control valve obtains electric, and the first potential energy recovery cylinder rod chamber is communicated with fuel tank;
The second solenoid directional control valve dead electricity, cut-out the first potential energy reclaims cylinder rod chamber, rodless cavity is communicated with lifting jar rod chamber, rodless cavity;
The first ball valve is opened, and the first potential energy reclaims cylinder rodless cavity and communicates with potential energy recovering hydraulic system;
The first potential energy reclaims cylinder and switches to unloaded cylinder:
The coil " a " of the first solenoid directional control valve obtains electric, and the first potential energy reclaims cylinder rod chamber, rodless cavity is all communicated with fuel tank;
The second solenoid directional control valve dead electricity, cut-out the first potential energy reclaims cylinder rod chamber, rodless cavity communicates with lifting jar rod chamber, rodless cavity respectively;
The first ball valve is closed, and cut-out the first potential energy recovery cylinder rodless cavity is communicated with potential energy recovering hydraulic system;
The first potential energy reclaims cylinder and switches to lifting jar:
The coil " a " of the first solenoid directional control valve, " b " all dead electricity, cut-out the first potential energy reclaims cylinder rod chamber, rodless cavity is communicated with fuel tank;
The second solenoid directional control valve obtains electric, and the first potential energy recovery cylinder rod chamber, rodless cavity are communicated with lifting jar rod chamber, rodless cavity respectively;
The first ball valve is closed, and cut-out the first potential energy recovery cylinder rodless cavity is communicated with potential energy recovering hydraulic system;
The first stand by pump starts, and supplements the first potential energy and reclaims cylinder and move required flow;
The second potential energy reclaims cylinder and switches to potential energy recovery cylinder:
The coil " b " of the 3rd solenoid directional control valve obtains electric, and the second potential energy recovery cylinder rod chamber is communicated with fuel tank;
The 4th solenoid directional control valve dead electricity, cut-out the second potential energy reclaims cylinder rod chamber, rodless cavity is communicated with lifting jar rod chamber, rodless cavity;
The second ball valve is opened, and the second potential energy reclaims cylinder rodless cavity and communicates with potential energy recovering hydraulic system;
The second potential energy reclaims cylinder and switches to unloaded cylinder:
The coil " a " of the 3rd solenoid directional control valve obtains electric, and the second potential energy reclaims cylinder rod chamber, rodless cavity is all communicated with fuel tank;
The 4th solenoid directional control valve dead electricity, cut-out the second potential energy reclaims cylinder rod chamber, rodless cavity communicates with lifting jar rod chamber, rodless cavity respectively;
The second ball valve is closed, and cut-out the second potential energy recovery cylinder rodless cavity is communicated with potential energy recovering hydraulic system;
The second potential energy reclaims cylinder and switches to lifting jar:
The coil " a " of the 3rd solenoid directional control valve, " b " all dead electricity, cut-out the second potential energy reclaims cylinder rod chamber, rodless cavity is communicated with fuel tank;
The 4th solenoid directional control valve obtains electric, and the second potential energy recovery cylinder rod chamber, rodless cavity are communicated with lifting jar rod chamber, rodless cavity respectively;
The second ball valve is closed, and cut-out the second potential energy recovery cylinder rodless cavity is communicated with potential energy recovering hydraulic system;
The second stand by pump starts, and supplements the second potential energy and reclaims cylinder and move required flow;
The seamless handover method of the potential energy recovery system the present invention relates under abnormal state, the application of the potential energy recovering hydraulic system under steady load and Vnsteady loads state applicable to lifting and walking machinery.The flexibility, the reliability that have further improved lifting and the application of walking machinery potential energy recovery system, still can ensure the normal operation of original equipment under even nonserviceabling.This technology can reclaim cylinder by part or all of potential energy according to actual conditions and switch to lifting jar or unloaded cylinder, and before and after guaranteeing to switch, the operation of equipment does not appoint guarantor to change, and has reached seamless switching object.
Claims (4)
1. the stand-by provision during for potential energy recovery system fault, is characterized in that: it comprises that potential energy recovery system, fuel tank, system main pump, lifting jar, the first potential energy reclaim cylinder, the second potential energy reclaims cylinder, the first solenoid directional control valve, the second solenoid directional control valve, the 3rd solenoid directional control valve, the 4th solenoid directional control valve, the first ball valve, the second ball valve, the first one-way valve, the second one-way valve, the 3rd one-way valve, safety valve, the first stand by pump and the second stand by pump;
The inlet port of system main pump, the first stand by pump and the second stand by pump is connected with fuel tank, the oil outlet of system main pump, the first stand by pump and the second stand by pump is connected respectively the filler opening of the 3rd one-way valve, the first one-way valve and the second one-way valve, the oil outlet of the 3rd one-way valve, the first one-way valve and the second one-way valve is communicated with and is connected with the rodless cavity hydraulic fluid port of lifting jar, the filler opening of safety valve connects the oil outlet of the 3rd one-way valve, and the oil outlet of safety valve connects fuel tank;
The rod chamber hydraulic fluid port that the first potential energy reclaims cylinder connects respectively the B mouth of the first solenoid directional control valve and the A mouth of the second solenoid directional control valve, and the rodless cavity hydraulic fluid port of the first potential energy recovery cylinder connects respectively A mouth, the B mouth of the second solenoid directional control valve and the filler opening of the first ball valve of the first solenoid directional control valve; T mouth, the T mouth of the 3rd solenoid directional control valve and the rod chamber hydraulic fluid port of lifting jar of the first solenoid directional control valve are communicated with and are connected with fuel tank; The P mouth of the P mouth of the second solenoid directional control valve and the 4th solenoid directional control valve is communicated with and is connected with the rodless cavity hydraulic fluid port of lifting jar, and the T mouth of the second solenoid directional control valve is communicated with and is connected with fuel tank with the T mouth of the 4th solenoid directional control valve and the rod chamber hydraulic fluid port of lifting jar; The oil outlet of the first ball valve connects potential energy recovery system;
The rod chamber hydraulic fluid port that the second potential energy reclaims cylinder connects respectively the B mouth of the 3rd solenoid directional control valve and the A mouth of the 4th solenoid directional control valve, and the rodless cavity hydraulic fluid port of the second potential energy recovery cylinder connects respectively A mouth, the B mouth of the 4th solenoid directional control valve and the filler opening of the second ball valve of the 3rd solenoid directional control valve; The oil outlet of the second ball valve connects potential energy recovery system.
2. the stand-by provision during for potential energy recovery system fault according to claim 1, is characterized in that: described the first stand by pump and the second stand by pump are gear pump, plunger pump or vane pump.
3. the using method of the stand-by provision during for potential energy recovery system fault according to claim 1 and 2, is characterized in that, comprises the steps:
Step 1: the maximum operational speed while rising according to lifting jar and the first potential energy reclaim specification and the quantity of cylinder, the second potential energy recovery cylinder, determine required peak rate of flow when the first potential energy reclaims cylinder, the second potential energy recovery cylinder rising, to determine the first stand by pump and the second pump size for subsequent use:
（1）
（2）
In formula (1):
Q
1max: required peak rate of flow when the first potential energy reclaims cylinder rising;
N
1: the first potential energy reclaims the quantity of cylinder;
D
1: the first potential energy reclaims cylinder rodless cavity diameter;
V
max: maximum operational speed when lifting jar rises;
In formula (2):
Q
2max: required peak rate of flow when the second potential energy reclaims cylinder rising
N
2: the second potential energy reclaims the quantity of cylinder;
D
2: the second potential energy reclaims cylinder rodless cavity diameter;
Required peak rate of flow Q while reclaiming cylinder and the rising of the second potential energy recovery cylinder according to the first potential energy
1max, Q
2maxcan confirm first, second pump size for subsequent use;
Step 2: according to Q
1max, Q
2maxdetermine the drive motor power of the first stand by pump, the second stand by pump with system pressure:
（3）
（4）
In formula (3):
P
1max: drive the required maximum motor power of the first stand by pump;
η
1: the efficiency of the first stand by pump;
P: system works pressure, its span is between 13～20MPa;
In formula (4):
P
2max: drive the required maximum motor power of the second stand by pump;
η
2: the efficiency of the second stand by pump;
According to the P calculating
1max, P
2maxselect the first stand by pump and the suitable drive motor of the second stand by pump.
4. the using method of the stand-by provision during for potential energy recovery system fault according to claim 3, is characterized in that: in step 2, and η
1, η
2get 0.8～0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310118171.XA CN104100608B (en) | 2013-04-08 | 2013-04-08 | For stand-by plant during potential energy recovery system fault and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310118171.XA CN104100608B (en) | 2013-04-08 | 2013-04-08 | For stand-by plant during potential energy recovery system fault and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104100608A true CN104100608A (en) | 2014-10-15 |
| CN104100608B CN104100608B (en) | 2016-06-01 |
Family
ID=51669051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310118171.XA Active CN104100608B (en) | 2013-04-08 | 2013-04-08 | For stand-by plant during potential energy recovery system fault and using method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN104100608B (en) |
Citations (9)
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|---|---|---|---|---|
| DE3930553A1 (en) * | 1989-09-13 | 1991-03-14 | Bosch Gmbh Robert | Lifting mechanism hydraulic control system - has pressure-equalisers for flow to and from pressure accumulator |
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| JP2010261539A (en) * | 2009-05-08 | 2010-11-18 | Kayaba Ind Co Ltd | Hybrid construction machine |
| CN102245911A (en) * | 2009-07-10 | 2011-11-16 | 萱场工业株式会社 | Control device for hybrid construction machine |
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| CN102734235A (en) * | 2012-07-12 | 2012-10-17 | 三一重工股份有限公司 | Energy recovery hydraulic system and concrete conveying pump |
| CN202628687U (en) * | 2012-06-08 | 2012-12-26 | 山河智能装备股份有限公司 | Energy-saving system for working device |
| CN102971542A (en) * | 2011-02-03 | 2013-03-13 | 日立建机株式会社 | Power regeneration device for work machine |
| CN104093996A (en) * | 2011-12-16 | 2014-10-08 | 卡特彼勒公司 | Hydraulic system having energy recovery |
-
2013
- 2013-04-08 CN CN201310118171.XA patent/CN104100608B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3930553A1 (en) * | 1989-09-13 | 1991-03-14 | Bosch Gmbh Robert | Lifting mechanism hydraulic control system - has pressure-equalisers for flow to and from pressure accumulator |
| CN101408212A (en) * | 2008-10-31 | 2009-04-15 | 浙江大学 | Energy recovery system of hybrid power engineering machinery actuating element |
| JP2010261539A (en) * | 2009-05-08 | 2010-11-18 | Kayaba Ind Co Ltd | Hybrid construction machine |
| CN102245911A (en) * | 2009-07-10 | 2011-11-16 | 萱场工业株式会社 | Control device for hybrid construction machine |
| CN102971542A (en) * | 2011-02-03 | 2013-03-13 | 日立建机株式会社 | Power regeneration device for work machine |
| CN202100559U (en) * | 2011-05-21 | 2012-01-04 | 山河智能装备股份有限公司 | Potential energy recovering hydraulic system |
| CN104093996A (en) * | 2011-12-16 | 2014-10-08 | 卡特彼勒公司 | Hydraulic system having energy recovery |
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| CN102734235A (en) * | 2012-07-12 | 2012-10-17 | 三一重工股份有限公司 | Energy recovery hydraulic system and concrete conveying pump |
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|---|---|
| CN104100608B (en) | 2016-06-01 |
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Effective date of registration: 20171124 Address after: 201999 Shanghai city Baoshan District Tieli Road No. 2510 room 416 Patentee after: Baosteel Engeneering &Technology Group Co., Ltd. Address before: 201900 room 503-C, room 1, building 1508, Mudanjiang Road, Shanghai, Baoshan District, 5 Patentee before: Baosteel Industrial Furnace Engineering Technology Co., Ltd. |