CN103206433A - Hydraulic group control energy saving system - Google Patents
Hydraulic group control energy saving system Download PDFInfo
- Publication number
- CN103206433A CN103206433A CN2012100973721A CN201210097372A CN103206433A CN 103206433 A CN103206433 A CN 103206433A CN 2012100973721 A CN2012100973721 A CN 2012100973721A CN 201210097372 A CN201210097372 A CN 201210097372A CN 103206433 A CN103206433 A CN 103206433A
- Authority
- CN
- China
- Prior art keywords
- single devices
- pressure
- hydraulic station
- hydraulic
- station
- Prior art date
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims abstract description 90
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000009825 accumulation Methods 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 238000004134 energy conservation Methods 0.000 abstract description 18
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 238000013461 design Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 108010074864 Factor XI Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
A hydraulic group control energy saving system comprises a central hydraulic station and single devices. The hydraulic group control energy saving system is characterized in that the central hydraulic station is provided with an oil supply system, the single devices are provided with S1-S6 button switches, the oil supply system of the central hydraulic station is respectively connected with hydraulic oil inlets of the single devices through pipelines, oil return ports and oil leakage ports of the single devices are respectively connected back to the central hydraulic station through pipelines, the central hydraulic station is controlled by the aid of a PLC (programmable logic controller), communication and parameter transmission are performed between the PLC of the central hydraulic station and each single device, so that a starting signal and a stopping signal of each single device and the period T of a product produced by each single device are uploaded to the PLC of the central hydraulic station, corresponding parameter lists in PLC programs of the central hydraulic station are activated by the button switches on the single devices, and the number of started pumps of the central hydraulic station is controlled by the PLC of the central hydraulic station according to actual production requirements, so that the requirements of hydraulic energy of the single devices are matched. The hydraulic group control energy saving system has the advantages of obvious energy conservation and control stability.
Description
Technical field
The present invention relates to a kind of hydraulics field, is a kind of novel hydraulic power-saving technology, is applicable to the group control system of middle-size and small-size many single devices such as class such as injection machine, lathe, harbour loop wheel machine, industrial robot.
Background technique
Energy Saving Technology by Hydraulic Pressure is used widely on some units, and such as widely used variable-frequency motor power-saving technology on the injection machine, these technology have played big energy-conserving action really, but only consider that from the unit angle its energy saving space is near the limit.If use hydraulic pressure group control energy-saving technology, make the demand volume of original each unit put together unified management, as long as each stand-alone device does not reach the peak flow demand at synchronization, then this energy saving space will be obviously.
Former single devices, when using a machine one hydraulic station, we have to design its maximum output from system's maximum output peak flow and pressure maximum, but when we use hydraulic pressure team control technology, we just needn't consider the peak energy demand of single devices, because each single devices peak demand always staggers in time, unless think painstakingly to pursue certain common output of peak value constantly.So, we only need the mean flowrate demand in certain workpiece process-cycle of consideration, even the peak-peak traffic demand that may occur, also can satisfy well by the quick startup of big capacity accumulation of energy station and back work pump, can lower the electric motor power of oil hydraulic pump so significantly, reach energy-conservation purpose thereby reduce system's no-load power consumption.
In stand-alone device, the mean flowrate demand in hydraulic system peak rate of flow peak demand and process-cycle often differs several times, as seen, uses hydraulic pressure group control energy-saving technology that the bigger energy saving space is arranged.
Summary of the invention
Technical problem to be solved by this invention is to be convenient to hydraulic pressure group control energy-saving system energy-conservation and control
The present invention solves the problems of the technologies described above the technological scheme that adopts: a kind of hydraulic pressure group control energy-saving system, and it includes central hydraulic station, each single devices, it is characterized in that:
There is the oil supply system that hydraulic oil externally is provided at the central hydraulic station and works the circulatory system of filtering, cooling off;
Single devices has separately hydrovalve platform, hydraulic actuator to reach relatively independent separately oil hydraulic circuit; On each single devices, at least have 4 push-button switches, wherein S1 is single devices " startup " button, S2 is that single devices " stops " button, S3 is " minimum operation cycle " button that single devices is produced product, and S4 is " average duty cycle " button that single devices is produced product;
The oil supply system at central hydraulic station connects the hydraulic oil import of single devices respectively by pipeline, and the return opening of single devices and leak hydraulic fluid port respectively by pipeline tieback central hydraulic station;
And PLC control is adopted at the central hydraulic station; communication and parameter transmission are arranged between the PLC controller at central hydraulic station and the single devices; the period T of starting-up signal, stopping signal and the single devices production product of each single devices is uploaded in the PLC controller at central hydraulic station; by the push-button switch on each single devices corresponding parameters table in the PLC director demon at central hydraulic station is activated; open quantity by the pump that the PLC controller at central hydraulic station is controlled the central hydraulic station according to the actual production demand, mate the demand of each single devices hydraulic pressure energy.
As improvement, the oil supply system at described central hydraulic station is divided into high pressure oil system and low pressure oil system, accordingly, single devices is provided with high-pressure inlet and low pressure inlet, make high pressure oil system delivery trunk road and low pressure oil system delivery trunk road be connected high-pressure inlet and the low pressure inlet of single devices respectively, and the return opening of single devices and leak hydraulic fluid port total oil returning tube and the total oily oil returning tube tieback central hydraulic station of leaking by the central hydraulic station respectively.
Further improve, described single devices also has " actual measurement operation cycle " push-button switch S5 that single devices is produced product.
Improve, described single devices also has one " manually control " and " control automatically " selector switch S6 again, puts on " manually control " position when revolving, and the control of central hydraulic station working pump is transferred to manually and implemented; When selecting switch to revolve to put on " control automatically " position, the control of central hydraulic station working pump is transferred to the PLC controller and is controlled automatically.
Preferably, described central hydraulic station externally provides high-pressure oil feed or low pressure oil supply, the two also can provide simultaneously, when both provide simultaneously, the relatively independent fuel feeding of high pressure oil system and low pressure oil system, hydraulic oil has relatively independent path of travel, and only under specific time or specific operating mode, the high pressure oil system just can carry out oiling to the low pressure oil system short time.Such as, low service system is because of certain reason, and its system's internal pressure sharply descends, drop in short time below the normal operating pressure, at this moment, can use high-pressure system in low service system, to carry out urgent supplementary pressure, low pressure is after pressure recovers, and high-pressure system stops oiling in the low service system.
Further improve, the oil supply system of inside, described central hydraulic station comprises high pressure oil system and low pressure oil system, they comprise working pump unit I, accumulation of energy station unit II, pressure sensing cell III and ECU (Electrical Control Unit) IV, described working pump unit I adopts main pump and service pump duty, working pump unit I provides main flow and pressure and keeps the required flow of system's internal and outernal leakage in order to give single devices and accumulation of energy station unit II, wherein main pump is normal operation, and service pump is controlled it for the signal that adopts pressure sensing cell III to detect by ECU (Electrical Control Unit) IV and started or stoped.
As improvement, described parameter list is:
The demand of each single devices hydraulic oil is called after respectively: Δ V
1, Δ V
2, Δ V
3..., Δ V
N-1, Δ V
n, and regulation Δ V
Always=Δ V
1+ Δ V
2+ Δ V
3+ ... + Δ V
N-1+ Δ V
n
Q
AllBe T average period
AllCorresponding traffic demand, Q
GreatlyBe certain product minimum average B configuration operation cycle T
LittleCorresponding peak rate of flow demand, Q
RealFor surveying the average duty cycle T of certain product
RealCorresponding flow.So every single devices has three significant flow parameter Q
All, Q
GreatlyAnd Q
Real, press each single devices called after respectively:
Q
Equal 1, Q
Equal 2, Q
Equal 3..., Q
Equal n-1, Q
Equal n
Q
Big by 1, Q
Big by 2, Q
Big by 3..., Q
Big n-1, Q
Big n
Q
Real 1, Q
Real 2, Q
Real 3..., Q
Real n-1, Q
Real n
N is natural number.
Preferably, described central hydraulic its main working pump total installed capacity flow Q of station
MainMust be able to satisfy each Q of all single devices
GreatlySum, back work pump total installed capacity flow Q
AuxilliaryGet main working pump 25～35%.
Preferably, effective discharge volume Δ V at described accumulation of energy station
HoldEffective electric motor power V for the accumulation of energy station
Hold10～25%.
Preferably, described oil supply system delivery pressure P must greater than each single devices can proper functioning the lowest limit pressure P
The utmost point, accumulator initially fills nitrogen pressure and pressure switch P
1～P
4Need satisfy following work relationship:
P
1=1.1P
The utmost point
P
2＝1.1P
1；
P
3＝1.15P
2；
P
4＝1.15P
2；
P
Hold=P
The utmost point
Compared with prior art, the invention has the advantages that: use hydraulic pressure team control technology, we just needn't consider the peak energy demand of single devices, because each single devices peak demand always staggers in time, unless think painstakingly to pursue certain common output of peak value constantly, so, we only need the mean flowrate demand in certain workpiece process-cycle of consideration, even the peak-peak traffic demand that may occur also can satisfy well by the quick startup of big capacity accumulation of energy station and back work pump, can lower the electric motor power of oil hydraulic pump so significantly, thereby reduce system's no-load power consumption, reach energy-conservation purpose, whole system control is stable, and is energy-conservation obvious; Adopt the benefit of this concentrated energy supply to mainly contain 3 points, the one, reduced the weight of stand-alone device, saved expensive real estate; The 2nd, reduced the electric motor power (or quantity) of motor-pump complete sets of equipment, saved cost; The 3rd, to be convenient to implement energy-conservation, energy-saving effect is much better than the reducing energy consumption effect of stand-alone device.
Description of drawings
Fig. 1 is hydraulic pressure group control system structure principle chart;
Fig. 2 is the internal structure schematic representation at central hydraulic station.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
The present invention provides the team control hydraulic structure that constitutes a class single devices to become schematic diagram and constructive method in examples of implementation.The present invention has illustrated the relation between each structure and has constituted the necessary condition of energy conserving system and the method for realization.
As shown in Figure 1, n single devices (for example injection machine) arranged in certain region, this n single devices shares a central hydraulic station, and the hydraulic station cut-away view as shown in Figure 2.Its detailed content is referring to hereinafter narration.
In real work, the single devices that we run into may be comparatively complicated, the single devices that has only needs high-pressure oil feed, the single devices that has only needs low pressure oil supply, and some single devices while demand high pressure and low pressure oil supply, wherein need the system of high and low pressure while fuel feeding comparatively common, the present invention is that example illustrates specific implementation process with the system that needs high low pressure simultaneously.
As shown in Figure 1, this figure is a hydraulic pressure group control system structural representation with n single devices, and this n single devices all needs high pressure and two kinds of forced feed loops of low pressure, each single devices be labeled as respectively monomer 1, monomer 2 ..., monomer n-1, monomer n, wherein, the natural number of n 〉=2.This n single devices has separately hydrovalve platform, hydraulic actuator to reach relatively independent separately oil hydraulic circuit, but they all need to be connected with the central hydraulic station by hydraulic pipe line.Among Fig. 1, inside, central hydraulic station has three complete relatively independent subtense angles, and they are respectively high pressure oil system, the circulatory system and low pressure oil system.The high pressure oil system exports high pressure oil to the outside, the low pressure oil system exports low pressure oil to the outside, the circulatory system is circulation, cooling, the filtering function system of the inner fluid in central hydraulic station, and these three subtense angles are both separate, and another constitutes a complete central hydraulic station (see figure 2).P
HighBe central hydraulic station high pressure oil system delivery trunk road, P
LowBe central hydraulic station low pressure oil system delivery trunk road, T is the total oil returning tube in central hydraulic station, and R is total oily oil returning tube that leaks.The hydrovalve platform of each single devices has 4 pipelines to be connected with central hydraulic station owner pipeline, and on each connecting pipeline, all arrange one and safeguard valve, shown in single devices among Fig. 11, these 4 valves are labeled as F1, F2, F3 and F4 respectively, can realize that by valve separately single devices is connected with the central hydraulic station or isolates, and is convenient to the maintenance of single devices.On each single devices, 5 push-button switches and a selector switch are arranged, wherein S1 is single devices " startup " button, S2 is that single devices " stops " button, S3 is " minimum operation cycle " button that single devices is produced product, S4 is " average duty cycle " button that single devices is produced product, S5 is " actual measurement operation cycle " button that single devices is produced product, S6 is " manually control " and " control automatically " selector switch, put on " manually control " position when revolving, the control of central hydraulic station working pump is transferred to manually and is implemented; When selecting switch to revolve to put on " control automatically " position, the control of central hydraulic station working pump is transferred to the PLC controller at central hydraulic station and is controlled automatically.
Central hydraulic station internal structure as shown in Figure 2.The central hydraulic station is the same with other energy-saving hydraulic station, all is a complete hydraulic station.There are three complete subtense angles at the central hydraulic station that this figure provides, inside, and they are respectively: high pressure oil system, low pressure oil system and the circulatory system (comprising fuel tank).Three both relatively independent operations of subtense angle, another constitutes a complete central hydraulic station, and wherein, high pressure oil system and low pressure oil system are structurally identical, be concrete parameter difference, the present invention is that example specifies its internal structure and parameter designing with the high pressure oil system.
As shown in Figure 2, the high pressure oil system is by working pump unit I, hydraulic energy-accumulating station unit II, and pressure sensing cell III and ECU (Electrical Control Unit) IV form.Wherein, working pump unit I is subdivided into main working pump unit A and miscellaneous function pump unit B again by function.Hydraulic energy-accumulating station II is made of some big capacity accumulators and appurtenances thereof.System pressure detection unit III is an element that constitutes this energy-conservation hydraulic station, is made up of pressure contact switch or pressure transducer, and usually, pressure switch must be formed by 4～5, or is made up of 1 of pressure transducer.System electric-controlled unit IV is the same with other hydraulic system, is made up of the electrical equipment software and hardware that comprises the PLC controller.
In this team control hydraulic system, each single devices can be a kind equipment, it also may be multi-class device, common requirement to them is that needed pressure is identical or close separately, so that the hydraulic flow demand of one or more pressure ratings is provided, if be not easy to satisfy, then need use independently hydraulic station fuel feeding separately.In the central hydraulic station, we also can only provide independent high pressure oil or low pressure oil, only need a kind of system of high and low pressure among both this moment; But in the ordinary course of things, we need the hydraulic system of two or more pressure ratings, and the present invention is that representative is illustrated with the high and low pressure system that two kinds of pressure ratings are provided.Generally speaking, high pressure oil only moves in the pipeline of high-pressure system sealing, low pressure oil is only moved in the pipeline of low service system sealing, they have the path of travel of relative closure separately, only specific local and specific the time, high pressure oil just allows to flow to the low pressure oil system, such as, low pressure oil and high pressure oil can be chronologically oiling in certain oil cylinder successively, and for example can share oil returning tube, share fuel tank, for another example, pressure to occur extremely in emergency circumstances low when low service system, high pressure oil allows short time oiling in the low pressure oil pipeline, except this situation, and independent operating separately.
The high and low pressure oil system is identical on structure and design method, is concrete parameter difference, so the present invention only provides complete high pressure oil system design description.
This hydraulic pressure team control structural type refers in certain region, being often referred to radius is the interior same class single devices of 1000 meters scopes, such as injection machine, lathe, industrial robot, single devices such as harbour loop wheel machine, the common same large hydraulic station of using provides the hydraulic pressure energy in this scope, hydrovalve platform between central hydraulic station and each single devices directly connects by pipeline, before entering each single devices hydrovalve platform, this pipeline is provided with control valve, this valve can be manual, electronic, surge or the control valve of other type, can open or cut off contacting between single devices and the central hydraulic station by this valve, so that maintenance.
The present invention is for traditional single devices one machine one hydraulic station, and something in common is that formations such as hydraulic actuator and hydraulic control circuit remain unchanged substantially; Difference has been to remove the hydraulic station (comprising fuel tank, pump-motor and control system) of former single devices, and then uses central large hydraulic station instead and concentrate the energy supply form.On the central hydraulic station, implement Energy Saving Technology by Hydraulic Pressure easily.
Adopt the benefit of this concentrated energy supply to mainly contain 3 points, the one, reduced the weight of stand-alone device, saved expensive real estate; The 2nd, reduced the electric motor power (or quantity) of motor-pump complete sets of equipment, saved cost; The 3rd, to be convenient to implement energy-conservation, energy-saving effect is much better than the reducing energy consumption effect of stand-alone device.
PLC control is adopted at the central hydraulic station; simple communication and parameter transmission are arranged between the PLC controller at central hydraulic station and the stand-alone device; the start of each single devices; the period T of stopping signal and production of units product all must upload in the central PLC controller; control the quantity that main working pump opens (also can by manually implementing) by central PLC; specifically by the S1 on each single devices～S6 operating button corresponding parameters table in the central PLC control program is activated; make the central hydraulic station can control the start quantity of each pump according to the actual production demand, be convenient to the demand of exporting to mate each unit hydraulic pressure energy with optimum capacity.
6 control knobs (or switch) are arranged on the operation panel of each single devices, when pressing " startup " button S1 of single devices, stand-alone device enters " allowing to use " standby condition, this signal is passed in the central PLC control program, PLC carries out main working pump and starts preparation, or reminds operator to manually boot relevant working pump.When pressing " stopping " button S2 of single devices, single devices enters halted state, simultaneously, this instruction is transferred to central PLC controller, central control unit thinks that this single devices no longer needs flow input, and central control unit can be cut off a certain (with immediate that working pump of this single devices traffic demand) in the main working pump automatically, makes remaining main working pump can also satisfy those single devices in usefulness, if can not satisfy, then main working pump does not stop; If when selecting switch S 6 to be placed in " manual control " position, then main working pump stops and need being determined by manually next.In pressing the operation button S3～S5 during any one button, the operation cycle instruction that this single devices is produced product is imported in the central PLC control program, activates the relevant flow parameter of this single devices that prestores in the control program (for details see attached table 1) table.Wherein, the S3 button signal activates the maximum mean flowrate demand of this corresponding product of " minimum operation cycle "; The S4 button signal activates the mean flowrate demand of " average duty cycle " corresponding this unit work, can actual test automatically the actual production cycle that this single devices is produced this product during the S5 pushbutton enable, and then draw the actual flow demand, when test finish press S5 again after, test parameter be delivered to automatically central control unit in, deposit the parameter list in the subordinate list one after as calculated in.These two buttons of S3, S4 can only be selected one of them at every turn, the S5 button can be selected also can not select, S5 has preference with respect to S3 and these two buttons of S4, the S5 button can also can only enter in single devices and could select after actual product is produced, this just has practical significance, when selecting this button, S3, S4 are just simultaneously ineffective, after finishing, test can reset, only otherwise press S3 or S4 button again, system is the actual measurement cycle with regard to the manufacture cycle that is defaulted as this product; And before using the S5 button, general S3 or the S4 of using earlier is as the cycle of this product is estimated.S6 is " manually control " and " control automatically " selector switch, puts on " manually control " position when revolving, and the control of central hydraulic station working pump is transferred to the central hydraulic station and manually implemented; When selecting switch to revolve to put on " control automatically " position, the control of central hydraulic station working pump is transferred to central PLC and is controlled automatically.The order that these six switches use is; S1 → S6 → S3 (or S4 or S5) → S2, or S1 → S6 → S3 (or S4) → S5 → S2.Need to prove that these six switches (or knob) also can be realized by the software of single devices, realize same function by the soft key in the man-machine interface, in essence and indistinction.We also can be with the control that realizes on the unified operation panel that deposit in the central hydraulic station of this 6 buttons (or switch) on each stand-alone device from top to bottom, but generally place on the stand-alone device, uses more more convenient.
Each working pump is made up of one or more working pump-motor among the working pump unit I, and wherein, main working pump motor partly or entirely adopts frequency control motor, and its working pump can adopt the variable working pump, also can adopt the paced work pump; And the motor in the back work pump unit B and pump are not strict with, and generally select for use threephase asynchronous machine and paced work pump just can satisfy energy-conservation actual demand, because always need external work done behind the back work pump startup.Hydraulic energy-accumulating station II is made of some big capacity accumulators and appurtenances thereof.System pressure detection unit III is an element that constitutes this energy-conservation hydraulic station, is made up of pressure contact switch or pressure transducer, and usually, pressure switch must be formed by 4, or 1 composition of pressure transducer.Difference called after pressure switch P
1, P
2, P
3, P
4With pressure transducer PT, each pressure switch setting value satisfies: P
1＜P
2＜P
3＜P
4, P wherein
1Be the Minimum operating pressure of system's permission output, P
4Normal operating pressure for system.Pressure switch P
1The automatic startup of control back work pump is namely as pressure switch P
1When being triggered, back work pump unit B starts automatically, as pressure switch P
4When being triggered, back work pump unit B stops automatically.Pressure switch P
2, P
3And P
4The rotating speed of common control variable-frequency motor is as pressure switch P
2When being triggered, motor turns round with rated speed, as pressure switch P
3When being triggered, the motor fall-back is as pressure switch P
4When being triggered, variable-frequency motor turns round with lowest speed, gets 1/5～1/3 speed low cruise of rated speed usually.ECU (Electrical Control Unit) IV is the same with each hydraulic station of existing use, ECU (Electrical Control Unit) is essential, the opening of its drive motor, stop with the loading of pump, unloading function all, hardware soft by it realize its control function, the present invention selects for use PLC controller and frequency-variable controller to realize the control function of pump (motor).
System's major parameter optimum design (being determined by six job steps)
1), single devices pressure oil volume delta V's determines;
2), single devices operation cycle and traffic demand are determined;
3), the total rated flow in working pump unit determines;
4), the accumulator electric motor power determines;
5), the system pressure parameter determines;
6), the pump work system determines.
1, single devices pressure oil volume delta V's determines
For finishing certain task, each single devices work presents complete periodic duty feature, and in each operation cycle, the hydraulic actuator course of action is all constant substantially, so in each operation cycle, the needed high pressure oil volume delta of each single devices V remains unchanged substantially, be the simplification problem, we think that Δ V remains unchanged always, and it is write in the central PLC control program as a basic parameter, make things convenient for us to call at any time.The demand of each single devices high pressure oil is called after respectively: Δ V
1, Δ V
2, Δ V
3..., Δ V
N-1, Δ V
n, and regulation Δ V
Always=Δ V
1+ Δ V
2+ Δ V
3+ ... + Δ V
N-1+ Δ V
n
2, single devices operation cycle and traffic demand are determined
In the periodic work of single devices, because producing the product variety difference, the operation cycle of each product is may difference very big, and sometimes we need to be treated differently, and to we are most important is arranged 3 operation cycles, and they are respectively: average duty cycle T
All, minimum average B configuration operation cycle T
Little, actual measurement average duty cycle T
RealAverage duty cycle T
AllBeing the actual average manufacture cycle in the long-term production process, is research object with all over products, is obtained by statistics actual count data; Minimum operation cycle T
LittleBe the average duty cycle of the minimum of producing certain type product, this model is that all produce the fastest kind in products, when producing this kind product, and the average hydraulic flow demand of stand-alone device maximum; Be the flexibility that the increase system uses, system is provided with actual measurement operation cycle T
RealMeasurement function, T
RealBe the unknown real work cycle of actual measurement product, get the average period of production in certain period usually.These data can be collected from actual production easily and be obtained.
The cycle of each single devices is designated as respectively:
T
Equal 1, T
Equal 2, T
Equal 3..., T
Equal n-1, T
Equal n
T
Little by 1, T
Little by 2, T
Little by 3..., T
Little n-1, T
Little n
T
Real 1, T
Real 2, T
Real 3..., T
Real n-1, T
Real n
According to the flow fundamental formular:
Q=Δ V/T, we obtain three groups of corresponding flow: Q
All, Q
Greatly, Q
RealWherein, Q
AllBe T average period
AllCorresponding traffic demand, Q
GreatlyBe the peak rate of flow demand of certain product minimum average B configuration operation cycle correspondence, Q
RealFor surveying the average duty cycle corresponding flow of certain product.So every single devices has three significant flow parameter Q
All, Q
GreatlyAnd Q
Real, press each single devices called after respectively:
Q
Equal 1, Q
Equal 2, Q
Equal 3..., Q
Equal n-1, Q
Equal n
Q
Big by 1, Q
Big by 2, Q
Big by 3..., Q
Big n-1, Q
Big n
Q
Real 1, Q
Real 2, Q
Real 3..., Q
Real n-1, Q
Real n
These three groups of flow parameters are the significant hydraulic flow demand of every single device, are the key parameters that we carry out energy-saving design.
Above-mentioned steps 1 and 2 each improve parameter unification are aggregated into parameter list and called after subordinate list 1, and are as follows:
Subordinate list 1
This parameter list deposits in the PLC control program of central hydraulic station, activate this parameter list by the S1 on every single devices～S5 button (or switch), after this parameter list is activated, system program is controlled the startup quantity of hydraulic pressure station owner working pump according to this parameter list, can satisfy the demand of each single devices in the best way to guarantee its flow.
3, the total rated flow of working pump determines
Main working pump total installed capacity flow is defined as Q
MainBack work pump total installed capacity flow is defined as Q
Auxilliary, at first determine Q
Main, secondly determine Q
Auxilliary
Main working pump total installed capacity flow Q
MainMust be able to satisfy each Q of all single devices
GreatlySum, namely
Q
Main〉=Q
Big by 1+ Q
Big by 2+ Q
Big by 3+ ... + Q
Big n-1+ Q
Big n, get herein
Q
Main=Q
Big by 1+ Q
Big by 2+ Q
Big by 3+ ... + Q
Big n-1+ Q
Big n
Back work pump total installed capacity flow Q
AuxilliaryGet main working pump 30%, namely
Q
Auxilliary=0.3Q
Main
4, the accumulator electric motor power determines
Regulation Δ V
HoldBe effective discharge volume at accumulation of energy station, V
HoldBe effective electric motor power at accumulation of energy station, ξ is effective emission factor at accumulation of energy station.
The accumulation of energy station is the important component part of this energy-conservation hydraulic station, reliable and increase energy-saving efficiency is selected big capacity accumulation of energy station for use for assurance equipment, generally requires effective emission factor ξ=10%～25% at accumulation of energy station, getting about 15% is convenient to realize effective discharge volume Δ V at accumulation of energy station
HoldGenerally need satisfy Δ V
Hold〉=10% Δ V
AlwaysAdvise preferred Δ V
Hold〉=15% Δ V
AlwaysFor good.
Determine accumulation of energy station effective discharge volume Δ V
Hold=15% Δ V
Always, namely
Δ V
Hold=0.15 Δ V
Always
Wherein, Δ V
HoldFor accumulation of energy stands in effective discharging volume in the work, Δ V
AlwaysBe the oil consumption total volume of each single devices in an operation cycle.
So the total installation of generating capacity at accumulation of energy station is chosen V
Hold〉=Δ V
AlwaysFor good.
5, the system pressure parameter determines
Definition: P is the actual delivery pressure of system, P
The utmost pointFor each single devices can proper functioning lowest limit pressure, P
HoldFor accumulator initially fills nitrogen pressure, P
4Design pressure for system's proper functioning.
The delivery pressure P of system must greater than each single devices can proper functioning the lowest limit pressure P
The utmost point, accumulator initially fills nitrogen pressure and pressure switch P
1～P
4It is good need satisfying following work relationship:
P
1〉=P
The utmost point,Generally get P
1=1.1P
The utmost point,Namely
P
1=1.1P
The utmost point
P
2＝1.1P
1；
P
3＝1.15P
2；
P
4＝1.15P
2。
P
Hold=P
The utmost point
6, the pump work system determines
Determining of pump work system is one of important content of this energy-conservation technology.In the control picture of central hydraulic station PLC; be provided with a pumping plant control picture; this picture is provided with a hydraulic station " the total startup " function button and " always a stopping " function button; after clicking " the total startup " button and affirmation; each working pump power-supply system of pumping plant is activated, and allows each working pump to start, after clicking " always stopping " button and affirmation; each power-supply system of pumping plant is closed system-down." total start " after button is clicked, the startup of each working pump also must by manually or system program start automatically, when stand-alone device button S6 is revolved when putting in " manually control " position, if will starting, stand-alone device comes into operation, then the main working pump at corresponding central hydraulic station must be by manually starting with it, when stand-alone device button S6 is revolved when putting in " automatically control " position, the main working pump of corresponding central hydraulic is started automatically by PLC with it, and its activator button is S1～S6; Its hold function is the same with the startup function, and the branch of " control automatically " and " manually controlling " is arranged.Have only when each single devices all to quit work, and after each single devices S2 button was pressed, " the always stopping " button among the PLC of central hydraulic station just effectively.In a word, " the total startup " and " the always stopping " button at central hydraulic station come down to central hydraulic station power management button.
Each pump of back work pump is by pressure switch P
1Control starts, by pressure switch P
4Control stops.
Other design parameter of system is determined not so difficult, and design parameters more provided by the invention are priority parameter, and system's design will be selected optimal parameter according to concrete actual conditions.
System's other each several part design is the same with conventional design of Hydraulic System, does not have specialization, here with regard to auspicious stating no longer.
Effect checks
It is 30 of 450X injection machines that there is model in certain factory, and every injection machine all carries a small-sized hydraulic station, and each hydraulic station be provided with height, in two grades of pressure sources.Arrange like this, concerning the user, cost is very high, and the no-load power consumption of every injection machine is very high, and energy waste is serious, though it is energy-conservation now can to replace common electric machine to carry out with actuating motor, but the actuating motor frequent starting, stop, frequent acceleration and deceleration, its energy-saving effect is general limited, and actuating motor is expensive.
At these factory's the problems referred to above, we can concentrate these 30 hydraulic injection molding machine stations, adopt the energy conservation model of being concentrated energy by the central hydraulic station, realize unifying fuel feeding by the central hydraulic station, remove former injection machine little hydraulic station separately simultaneously.The central hydraulic station can provide high and medium voltage two kinds of pressure sources simultaneously, and, the big capacity hydraulic energy-accumulating of 2 covers station is set in hydraulic station, a cover is middle pressure accumulation of energy station, and a cover is the high-pressure and hydraulic station, and every cover accumulation of energy station total installation of generating capacity respectively is 1500L.Like this, we just can use the approximately drive motor power of former 30 injection machine total installations of generating capacity 1/4, have obtained same ordinary production demand.Why reduced total installation of generating capacity, the one, because these 30 injection machines always form the traffic demand of avoiding the peak hour, the 2nd, because used jumbo hydraulic energy-accumulating station to come the pressure store energy.In order to reach further energy-conservation, we are in the central hydraulic station, and the selected part motor is variable frequency regulating speed control, when system pressure reaches normal setting pressure, and the motor fall-back.
In these 30 injection machines, if because of the production actual demand, only need start equipment component, then the central hydraulic standing-meeting according to the offer quantity that the quantity that is equipped with is chosen the most appropriate oil hydraulic pump in central hydraulic station automatically, so can not cause system installed capacity greater than the unfavorable situation of actual demand automatically yet.
Through improved like this injection machine, hydraulic system is energy-conservation to be reached more than 70%, more energy-conservation more than 15% than simple use actuating motor.Not only energy-conservation, also significantly reduced user cost, this is the direction of injection machine industry future development.
Claims (10)
1. hydraulic pressure group control energy-saving system, it includes central hydraulic station, each single devices, it is characterized in that:
There is the oil supply system that hydraulic oil externally is provided at the central hydraulic station and works the circulatory system of filtering, cooling off;
Single devices has separately hydrovalve platform, hydraulic actuator to reach relatively independent separately oil hydraulic circuit; On each single devices, at least have 4 push-button switches, wherein S1 is single devices " startup " button, S2 is that single devices " stops " button, S3 is " minimum operation cycle " button that single devices is produced product, and S4 is " average duty cycle " button that single devices is produced product;
The oil supply system at central hydraulic station connects the hydraulic oil import of single devices respectively by pipeline, and the return opening of single devices and leak hydraulic fluid port respectively by pipeline tieback central hydraulic station;
And PLC control is adopted at the central hydraulic station; communication and parameter transmission are arranged between the PLC controller at central hydraulic station and the single devices; the period T of starting-up signal, stopping signal and the single devices production product of each single devices is uploaded in the PLC controller at central hydraulic station; by the push-button switch on each single devices corresponding parameters table in the PLC director demon at central hydraulic station is activated; open quantity by the pump that the PLC controller at central hydraulic station is controlled the central hydraulic station according to the actual production demand, mate the demand of each single devices hydraulic pressure energy.
2. hydraulic pressure group control energy-saving according to claim 1 system, the oil supply system that it is characterized in that described central hydraulic station is divided into high pressure oil system and low pressure oil system, accordingly, single devices is provided with high-pressure inlet and low pressure inlet, make high pressure oil system delivery trunk road and low pressure oil system delivery trunk road be connected high-pressure inlet and the low pressure inlet of single devices respectively, and the return opening of single devices and leak hydraulic fluid port total oil returning tube and the total oily oil returning tube tieback central hydraulic station of leaking by the central hydraulic station respectively.
3. hydraulic pressure group control energy-saving according to claim 1 system is characterized in that described single devices also has " actual measurement operation cycle " push-button switch S5 that single devices is produced product.
4. hydraulic pressure group control energy-saving according to claim 1 system, it is characterized in that described single devices also has one " manually control " and " control automatically " selector switch S6, put on " manually control " position when revolving, the control of central hydraulic station working pump is transferred to manually and is implemented; When selecting switch to revolve to put on " control automatically " position, the control of central hydraulic station working pump is transferred to the PLC controller and is controlled automatically.
5. hydraulic pressure group control energy-saving according to claim 2 system, it is characterized in that described central hydraulic station externally provides high-pressure oil feed or low pressure oil supply, the two also can provide simultaneously, when both provide simultaneously, the relatively independent fuel feeding of high pressure oil system and low pressure oil system, hydraulic oil has relatively independent path of travel, only under specific operating mode, the high pressure oil system just can carry out oiling to the low pressure oil system short time, specific operation refers to that low service system is because of certain reason, its system's internal pressure sharply descends, drop in short time below the normal operating pressure, at this moment, can use the high pressure oil system in the low pressure oil system, to carry out urgent supplementary pressure, low pressure is after pressure recovers, and the high pressure oil system stops oiling in the low pressure oil system.
6. hydraulic pressure group control energy-saving according to claim 1 system, the oil supply system that it is characterized in that inside, described central hydraulic station comprises high pressure oil system and low pressure oil system, they comprise working pump unit (I), unit, accumulation of energy station (II), pressure sensing cell (III) and ECU (Electrical Control Unit) (IV), described working pump unit (I) adopts main pump and service pump duty, working pump unit (I) provides main flow and pressure and keeps the required flow of system's internal and outernal leakage in order to give single devices and unit, accumulation of energy station (II), wherein main pump is normal operation, and service pump is controlled it for the signal that adopts pressure sensing cell (III) to detect by ECU (Electrical Control Unit) (IV) and started or stoped.
7. hydraulic pressure group control energy-saving according to claim 1 system is characterized in that described parameter list is:
The demand of each single devices hydraulic oil is called after respectively: Δ V
1, Δ V
2, Δ V
3..., Δ V
N-1, Δ V
n, and regulation Δ V
Always=Δ V
1+ Δ V
2+ Δ V
3+ ... + Δ V
N-1+ Δ V
n
Q
AllBe T average period
AllCorresponding traffic demand, Q
GreatlyBe certain product minimum average B configuration operation cycle T
LittleCorresponding peak rate of flow demand, Q
RealFor surveying the average duty cycle T of certain product
RealActual flow, every single devices has three significant flow parameter Q
All, Q
GreatlyAnd Q
Real, press each single devices called after respectively:
Q
Equal 1, Q
Equal 2, Q
Equal 3..., Q
Equal n-1, Q
Equal n
Q
Big by 1, Q
Big by 2, Q
Big by 3..., Q
Big n-1, Q
Big n
Q
Real 1, Q
Real 2, Q
Real 3..., Q
Real n-1, Q
Real n
N is natural number.
8. hydraulic pressure group control energy-saving according to claim 1 system is characterized in that its main working pump total installed capacity flow Q of described central hydraulic station
MainMust be able to satisfy each Q of all single devices
GreatlySum, back work pump total installed capacity flow Q
AuxilliaryGet main working pump 25～35%.
9. hydraulic pressure group control energy-saving according to claim 6 system is characterized in that effective discharge volume Δ V at described accumulation of energy station
HoldEffective electric motor power V for the accumulation of energy station
Hold10～25%.
10. hydraulic pressure group control energy-saving according to claim 1 system, it is characterized in that described oil supply system delivery pressure P must greater than each single devices can proper functioning the lowest limit pressure P
The utmost point, accumulator initially fills nitrogen pressure and pressure switch P
1～P
4Need satisfy following work relationship:
P
1=1.1P
The utmost point
P
2＝1.1P
1；
P
3＝1.15P
2；
P
4＝1.15P
2；
P
Hold=P
The utmost point
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210097372.1A CN103206433B (en) | 2012-01-17 | 2012-04-05 | A kind of hydraulic pressure group control energy-saving system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210015790 | 2012-01-17 | ||
| CN2012100157901 | 2012-01-17 | ||
| CN201210015790.1 | 2012-01-17 | ||
| CN201210097372.1A CN103206433B (en) | 2012-01-17 | 2012-04-05 | A kind of hydraulic pressure group control energy-saving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103206433A true CN103206433A (en) | 2013-07-17 |
| CN103206433B CN103206433B (en) | 2015-08-12 |
Family
ID=48753778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210097372.1A Active CN103206433B (en) | 2012-01-17 | 2012-04-05 | A kind of hydraulic pressure group control energy-saving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103206433B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713610A (en) * | 2014-01-02 | 2014-04-09 | 莱芜钢铁集团有限公司 | Hydraulic control system of hot rolling production line and control method thereof |
| CN105041731A (en) * | 2015-08-07 | 2015-11-11 | 中国中元国际工程有限公司 | Hydraulic station for steelshop steel making furnaces and arrangement method of hydraulic station |
| CN110153360A (en) * | 2018-01-26 | 2019-08-23 | 山东金马工业集团股份有限公司 | A kind of hot extrusion system of processing suitable for spindle nose forging |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030035564A (en) * | 2001-10-31 | 2003-05-09 | 주식회사 포스코 | Roll Force Control Unit using Pressure Transmitter |
| US6725940B1 (en) * | 2000-05-10 | 2004-04-27 | Pierce Manufacturing Inc. | Foam additive supply system for rescue and fire fighting vehicles |
| EP1536071A1 (en) * | 2002-09-05 | 2005-06-01 | Hitachi Construction Machinery Co., Ltd. | Hydraulic driving system of construction machinery |
| JP2005284533A (en) * | 2004-03-29 | 2005-10-13 | Yaskawa Electric Corp | Process machine simulator device for plc debugging |
| EP1613555A1 (en) * | 2002-12-18 | 2006-01-11 | Markos Ninolakis | Electrochemical method of sterilizing the sea ballast of ships |
| CN2928293Y (en) * | 2006-06-23 | 2007-08-01 | 宁波宝新不锈钢有限公司 | Energy saving hydraulic station for stainless steel pulling straightening and rewinding producing line |
| CN201090562Y (en) * | 2007-09-20 | 2008-07-23 | 韶关市起重机厂有限责任公司 | Electrohydraulic control system of tipper |
| CN101513969A (en) * | 2009-03-06 | 2009-08-26 | 山东泰山天盾矿山机械有限公司 | High-voltage multi-PLC converter low-frequency brake electric control system of a lifter |
| CN201475067U (en) * | 2009-09-04 | 2010-05-19 | 佛山市顺德区震德塑料机械有限公司 | Multi-pump combined control hydraulic power system based on servo motor control |
| CN201982414U (en) * | 2011-03-16 | 2011-09-21 | 陈海波 | Double valve confluence hydraulic control device |
-
2012
- 2012-04-05 CN CN201210097372.1A patent/CN103206433B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6725940B1 (en) * | 2000-05-10 | 2004-04-27 | Pierce Manufacturing Inc. | Foam additive supply system for rescue and fire fighting vehicles |
| KR20030035564A (en) * | 2001-10-31 | 2003-05-09 | 주식회사 포스코 | Roll Force Control Unit using Pressure Transmitter |
| EP1536071A1 (en) * | 2002-09-05 | 2005-06-01 | Hitachi Construction Machinery Co., Ltd. | Hydraulic driving system of construction machinery |
| EP1613555A1 (en) * | 2002-12-18 | 2006-01-11 | Markos Ninolakis | Electrochemical method of sterilizing the sea ballast of ships |
| JP2005284533A (en) * | 2004-03-29 | 2005-10-13 | Yaskawa Electric Corp | Process machine simulator device for plc debugging |
| CN2928293Y (en) * | 2006-06-23 | 2007-08-01 | 宁波宝新不锈钢有限公司 | Energy saving hydraulic station for stainless steel pulling straightening and rewinding producing line |
| CN201090562Y (en) * | 2007-09-20 | 2008-07-23 | 韶关市起重机厂有限责任公司 | Electrohydraulic control system of tipper |
| CN101513969A (en) * | 2009-03-06 | 2009-08-26 | 山东泰山天盾矿山机械有限公司 | High-voltage multi-PLC converter low-frequency brake electric control system of a lifter |
| CN201475067U (en) * | 2009-09-04 | 2010-05-19 | 佛山市顺德区震德塑料机械有限公司 | Multi-pump combined control hydraulic power system based on servo motor control |
| CN201982414U (en) * | 2011-03-16 | 2011-09-21 | 陈海波 | Double valve confluence hydraulic control device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103713610A (en) * | 2014-01-02 | 2014-04-09 | 莱芜钢铁集团有限公司 | Hydraulic control system of hot rolling production line and control method thereof |
| CN105041731A (en) * | 2015-08-07 | 2015-11-11 | 中国中元国际工程有限公司 | Hydraulic station for steelshop steel making furnaces and arrangement method of hydraulic station |
| CN105041731B (en) * | 2015-08-07 | 2017-03-08 | 中国中元国际工程有限公司 | Steelshop converter Hydraulic Station and its method for arranging |
| CN110153360A (en) * | 2018-01-26 | 2019-08-23 | 山东金马工业集团股份有限公司 | A kind of hot extrusion system of processing suitable for spindle nose forging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103206433B (en) | 2015-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101736771B (en) | Rotary decelerating and braking energy recovery system of hydraulic excavator | |
| CN101623920B (en) | Energy-saving servo hydraulic control system for injection machine and control method thereof | |
| CN201649155U (en) | Rotary decelerating brake energy recovery system of hydraulic excavator | |
| CN104153425A (en) | Constant-pressure water supply system | |
| CN106014999B (en) | A kind of water-ring vacuum pump assembly Effec-tive Function control method and control system | |
| CN108383039B (en) | A kind of energy-saving stepping type lifter structure hydraulic control system | |
| CN103206433A (en) | Hydraulic group control energy saving system | |
| CN105605035A (en) | Constant-pressure hydraulic thrust control system and method for sludge plunger pump | |
| CN102900477A (en) | High-power hydraulic turbine energy recovery system | |
| CN104704284A (en) | Multi-stream compressor management system and method | |
| CN104929992A (en) | Energy-saving design method for variable-load servo control system | |
| CN101225668A (en) | Control method of multiple system hybrid-power hydraulic shovel | |
| CN107461321A (en) | The more frequency conversion emulsion power pack systems of mining more pumps and quantitative liquid feeding control method | |
| CN105014897A (en) | Energy-saving and pressure-maintaining device for hydraulic injection molding machine | |
| CN106284520A (en) | Inequality based on PLC synchronizes constant pressure water supply system and control method thereof | |
| CN203894056U (en) | Tester comprehensive stepless oil supply apparatus | |
| CN103832416B (en) | Hydraulic machinery rotary braking energy reuse device | |
| CN206339442U (en) | Hydraulic pressure intelligently loads detection means | |
| CN115012886A (en) | Efficient and energy-saving constant-pressure displacement device and constant-pressure displacement method | |
| CN201757100U (en) | Hydraulic motor running-in device | |
| CN103170531A (en) | Electro-hydraulic synchronization numerically controlled bending machine servo pump driving device | |
| CN203265338U (en) | Servo pump driving device for electro-hydraulic synchronous numerical-control bending machine | |
| CN2425954Y (en) | Double-intelligent type pipe network pressure and flow boosted water supply equipment | |
| CN2751168Y (en) | Energy-saving accelerating system for big-diameter hydraulic cylinder | |
| CN111412176A (en) | Turning system device of centrifugal pump and using method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Rongzhi Inventor after: Shen Feng Inventor after: Guo Shasha Inventor before: He Rongzhi |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151228 Address after: West Street in the official Zhejiang city of Ningbo province Zhenhai District 315201 Village No. 777 Patentee after: NINGBO HEXIE ENERGY CONSERVATION CO.,LTD. Address before: 315807, room 3, building 304, Li Ren garden, Ningbo, Zhejiang, Beilun Patentee before: He Rongzhi |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: West Street in the official Zhejiang city of Ningbo province Zhenhai District 315201 Village No. 777 Patentee after: Ningbo harmonious energy saving Polytron Technologies Inc. Address before: West Street in the official Zhejiang city of Ningbo province Zhenhai District 315201 Village No. 777 Patentee before: NINGBO HEXIE ENERGY CONSERVATION CO.,LTD. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20191218 Address after: No. 801, Beihai Road, Ningbo Chemical Industry Zone, Shupu Town, Zhenhai District, Ningbo City, Zhejiang Province Patentee after: NINGBO HESHENGDA ENERGY TECHNOLOGY CO.,LTD. Address before: West Street in the official Zhejiang city of Ningbo province Zhenhai District 315201 Village No. 777 Patentee before: Ningbo harmonious energy saving Polytron Technologies Inc. |
|
| TR01 | Transfer of patent right |