CN207485588U - The Flow vibration power generator that a kind of excitation automatically supplies - Google Patents
The Flow vibration power generator that a kind of excitation automatically supplies Download PDFInfo
- Publication number
- CN207485588U CN207485588U CN201720965771.3U CN201720965771U CN207485588U CN 207485588 U CN207485588 U CN 207485588U CN 201720965771 U CN201720965771 U CN 201720965771U CN 207485588 U CN207485588 U CN 207485588U
- Authority
- CN
- China
- Prior art keywords
- excitation
- generator
- power
- runner
- power supply
- 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.)
- Active
Links
Landscapes
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The Flow vibration power generator that a kind of excitation automatically supplies, suitable for the utilization of utilizing ocean current energy, it is made of guide vane, honeycomb barretter, first support, second support, gear set, change excitation generator, motor output line, separate excitation power cord, change electric controller, adjustable source, power source switching controller, external startup power supply, transformation device, oscillator, linkage, runner stent, power generation water conservancy diversion current stabilization runner.The device ensures the controllability that independence, flexibility and the electric energy of Flow vibration power generator export using becoming excitation generator and realizing self supply of the electric energy of change excitation generator and quick control.The application system principle is simply clear, and the device economy is good, and the various pieces of system select general common instrument and material, and each section is easy to make, easy for installation, highly practical.
Description
Technical field
This application involves ocean current and tidal power generating fields, are the Flow vibration power generations that a kind of achievable excitation voltage automatically supplies
Device.
Background technology
Ocean current marine tidal-current energy is increasingly paid close attention to because of its extensive distribution with huge reserves by various countries energy development person.According to
Statistics, the whole world can be up to 5,000,000 MW using energy by ocean current.In China, the theoretical exploitation amount of single littoral flow is just more than 140,000 MW, quite
In the installed capacity of 70 the three gorges hydropower plants, reserves are visible huge.But due to the big portion's ocean current being distributed in world wide
Flow velocity is relatively low, and the ocean current generator start velocity of traditional oar blade type is higher, can not be used in the range of most of low speed ocean currents,
So as to cause ocean current energy utilization situation bad.To solve this problem, 2008, the Bernitsas of Univ Michigan-Ann Arbor USA
Professor and its team successfully have developed a kind of novel low speed water power generator --- VIVACE (Vortex Induced
Vibration For Aquatic Clean Energy), and successfully apply for a patent.The electricity generating principle of the device and traditional blade
The electricity generating principle of formula is entirely different, uses the basic principle of vortex-induced vibration that motor is driven to generate electricity.The device is compared to tradition
Ocean current generator there is the advantages such as start velocity low (minimum to can reach 0.25m/s), energy density be big, and apparatus structure letter
Single, modular capability is stronger, has good promotion prospect.
But at present, VIVACE and relevant Flow vibration power generator are also in development phase, vibration mechanism and power generation
The generating capacity research of system is all also short of, specifically, being primarily present following two problems.(1) existing power generation dress
It puts mostly using fixed excitation generator, excitation can not be adjusted, thus can not flexible modulation output electric energy；And become for employing
The Flow vibration power generator of excitation generator, since excitation voltage needs to be provided by the external world, so as to reduce device reality
Application power.(2) mostly based on unenclosed construction, vibration oscillator is exposed to extraneous water environment and works as existing power generator
In, once external environment water body exist fluctuation, then can extreme influence oscillator stability of vibration, so as to influence power generating quality.It can
See, above-mentioned 2 problems greatly constrain the popularization and application of VIVACE and relevant Flow vibration power generator.
For this purpose, the application proposes the Flow vibration power generator that a kind of excitation automatically supplies, which is generated electricity using excitation is become
Machine, and there is the field power supply functions of physical supply automatically supplied, supply the larger of excitation generator so as to avoid using extraneous power supply
Disadvantage enhances the ability of power generator independent operating, so as to which convection current causes operation and control, popularization and the electric energy of vibration generating device
Online provides excellent support.In addition, present applicant proposes the rectification runner that can accommodate more oscillators, the fluid stable of overcurrent ensure that
With flow control, and realize more oscillators same field vibration, induce the generation of wake galloping, enhance the vibration of single oscillator,
So as to effectively improve the generating capacity of such power generator and power generating quality.
Invention content
Purpose：The application is directed to a kind of Flow vibration power generator using ocean current energy, and the device is using change excitation
Generator and realization become self supply of the electric energy of excitation generator and quick control, the independence of guarantee Flow vibration power generator
Property, flexibility and electric energy output controllability.In addition, the application sets rectification runner and control structure, more oscillators are ensure that
Power generating quality and effectively promoted single unit system generating capacity.
Technical solution is：The Flow vibration power generator that a kind of excitation automatically supplies, by guide vane, honeycomb barretter, first
Frame, second support, gear set, become excitation generator, motor output line, separate excitation power cord, become electric controller, adjustable source,
Power source switching controller, external startup power supply, transformation device, oscillator, linkage, runner stent, power generation water conservancy diversion current stabilization runner
Composition；
Wherein guide vane, honeycomb barretter and power generation water conservancy diversion current stabilization runner composition water conservancy diversion current stabilization flow-path module A, gear set shake
Son and linkage composition vibration transmission module B, become excitation generator, motor output line, separate excitation power cord, become electric controller,
Adjustable source, power source switching controller, external startup power supply, transformation device composition electricity generation module C；
Guide vane is mounted on the rectangular cross section of power generation water conservancy diversion current stabilization runner and the junction of necked-down section, controls rectangularl runner
The water inlet aperture of port；
Honeycomb barretter plays the role of the current stabilization to ocean current, is fixed on rectangularl runner entrance close to guide vane；
First support is used for fixing gear set, second support for fixed change excitation generator；
Gear set is fixed in first support, and the mechanical energy of oscillator is converted into change excitation by linkage and gear set
The mechanical energy of generator amature, vibration transmission module B can be integrally good in land installation and debugging, then is sealed entirety after processing
On power generation water conservancy diversion current stabilization runner；
Become excitation generator to be fixed in second support；
Become excitation generator and transformation device is connected by motor output line, transformation device concentrates the electric energy of each electricity generation system
And power transformation operation is carried out, be transferred to user or is connected to the grid；Become excitation generator by separate excitation power cord connect become electric controller,
Power source switching controller and adjustable source can be the magnet exciting coil power supply for becoming excitation generator；Adjustable source connects power supply
Switch controller and external startup power supply；
Oscillator is connected by linkage with gear set becomes excitation generator, and linkage is by sliding rack and heavy frame two
It is grouped as, electricity generation module C is connected with vibration transmission module B, and unifies to be mounted on power generation water conservancy diversion after carrying out waterproof anti-corrosion measure
On current stabilization runner.
Further, above-described guide vane selects rotatable movable metallic guide vane, maximum rotation angle 90
Degree.
Further, above-described honeycomb barretter selects the PVC pipe that caliber is 5~20cm, and tubing is combined and is arranged
Row.
Further, above-described first support, second support are selected anti-seawater corrosion material or are selected common
Stainless steel material, and carry out anti-corrosion treatment on common stainless steel material surface layer.
Further, it is to become the magnetic induction coil power supply of excitation generator by external startup power supply when system starts；Work as stream
When state is stablized, electric energy output is stablized, and part power generation electric energy at this time is exported, then by motor output line, change electric controller by electricity
Source switch controller, which supplies the electric energy, becomes excitation generator；Then, by external startup power supply, gradually transition is hair to excitation electric energy
Motor automatically supplies electric energy, and target is automatically supplied so as to fulfill system excitation electric energy.
Further, above-described oscillator shape is chosen as the shapes such as triangular prism, hexagonal prisms, cylinder, selects organic glass
Glass material is made as hollow fillable form.
Advantageous effect：
A kind of excitation, which automatically supplies system and flows down, causes vibration magnetic electricity generation system and (automatic) control device, suitable for utilizing ocean current
The utilization of energy mainly include three advantageous effects.First, generator can be encouraged using excitation generator is become by adjusting
Magnetoelectricity pressure realizes the adjusting of electric energy output, so as to meet different power demands；Secondly, the change excitation generator of system passes through control
Method processed realizes automatically supplying for excitation voltage, so as to greatly enhance the independence of system, and ensure that system is higher
Generating efficiency；Again, present apparatus setting runner and flow control, diversing flow system, ensure that the stationary flow condition needed for oscillator vibration,
And the mode of more oscillator collaboration vibrations is realized, it both ensure that power generating quality also improved generating efficiency.In addition, the application system
Principle is simply clear, and the device economy is good, and the various pieces of system select general common instrument and material, and each section is easy
It is easy for installation in making, it is highly practical.
Description of the drawings
The Flow vibration power generator that a kind of excitations of Fig. 1 automatically supply starts control flow chart
The Flow vibration power generator side view that a kind of excitations of Fig. 2 automatically supply
The Flow vibration power generator vertical view that a kind of excitations of Fig. 3 automatically supply
Specific embodiment
Referring to attached drawing 2 and attached drawing 3, the Flow vibration power generator that the utility model excitation automatically supplies is steady by guide vane 1, honeycomb
Flow tube 2, second support 4, gear set 5, becomes excitation generator 6, motor output line 7, separate excitation power cord 8, power transformation at first support 3
Controller 9, adjustable source 10, power source switching controller 11, external startup power supply 12, transformation device 13, oscillator 14, linkage dress
Put the compositions such as 15, runner stent 16, power generation water conservancy diversion current stabilization runner 17；
Wherein guide vane 1, honeycomb barretter 2 and power generation water conservancy diversion current stabilization runner 17 form water conservancy diversion current stabilization flow-path module A, gear set
5th, oscillator 14 and linkage 15 composition vibration transmission module B, become excitation generator 6, motor output line 7, separate excitation power cord 8,
Become electric controller 9, adjustable source 10, power source switching controller 11, external startup power supply 12, the composition power generation mould of transformation device 13
Block C；
Guide vane 1 is mounted on the junction of water conservancy diversion current stabilization runner rectangular cross section and necked-down section, controls rectangularl runner port
Water inlet aperture, control the size of flow in runner, guide vane maximum rotation angle is 90 degree, can be with according to current stabilization flow channel depth
8 guide vanes are selected, guide vane width is 1.1m, is highly 0.25m；
Honeycomb barretter 2 plays the role of the current stabilization to ocean current so that the flow into rectangularl runner is relatively steady, improves hair
The stability of flow in conductance stream current stabilization runner 17, the PVC pipe that caliber is selected to be 10cm, is glued tubing assembled arrangement with glue
It closes, is fixed on rectangularl runner entrance close to guide vane 1；
First support 3 is used for fixing gear set 5, second support 4 be used for it is fixed become excitation generator 6, first support 3 and the
Two stents 4 select stainless steel, and anti-seawater corrosion paint is brushed on its surface layer, which is both easy to operate and cost compared with
It is low.
Gear set case 5 is fixed in first support 3, and the mechanical energy of oscillator 14 is passed through 5 turns of linkage 15 and gear set
The mechanical energy for becoming 6 rotor of excitation generator is turned to, gear set 5 selects 45# steel integral quenchings, and gear set selects the tooth of diameter 10cm
The gear one of one, wheel, the gear one of diameter 6cm and 8cm.It smears paint and makes it have good resist in gear set case surface layer
Corrosivity, and processing is sealed to gear-box sealing part, prevent sea water intrusion gear set；Transmission module B is vibrated in land
Installation and debugging are good, are sealed after processing integral installation again on power generation water conservancy diversion current stabilization runner 17.
Become excitation generator 6 to be fixed in second support 4, becoming excitation generator 6 can be according to the vibration frequency of device oscillator 14
The range of the rotating speed of rate and change excitation generator rotor, determines to become 6 model Z400/20-220 of excitation generator, specified electricity
It flows for 3.5A, rated speed 2000r/min；
Become excitation generator 6 and transformation device 13 is connected by motor output line 7, transformation device 13 gathers each generator unit
Electric energy carries out power transformation work, by electrical energy transportation to power grid or electricity consumption user；Become excitation generator 6 by separate excitation power cord 8 to connect
Connect become electric controller 9, power source switching controller 11 and adjustable source 10 (input terminal of power supply into 220V AC voltage, can be with
Common socket is attached；The output voltage adjustable range of power supply is 0V~220V, output current adjustable extent for 0~
30A), the magnetic induction intensity of change 6 magnet exciting coil of excitation generator of control system；Motor output line 7 and separate excitation power cord 8 are optional
With common copper conductor；Become electric controller 9 and select and the unstable electric energy for becoming excitation generator 6 can be exported as steady electric energy
Control device；Adjustable source 10 is adjustable source of the voltage and current adjustable extent in the device scope of application；Power supply
Switch controller 11 can switch the power supply for becoming 6 magnetic induction coil of excitation generator；
Adjustable source 10 connects power source switching controller 11 and external startup power supply 12, external startup power supply 12 are being
Power when system starts to become excitation generator 6 (in the utilization of ocean current energy, solar panel can be selected in external startup power supply,
The dependence of system external circle is reduced, enhances the independence of system)；When becoming the output of 6 stable electric power of excitation generator, pass through electricity
The connection of machine output line 7 becomes electric controller 9 and exports regulated power, then the magnetic that will become excitation generator 6 by power source switching controller 11
By external startup power supply 12, gradually transition is becomes excitation generator 6 to induction coil power supply, finally by adjustable source 10
It powers for magnetic induction coil, realizes automatically supplying for system magnet coils power supply；
A part of the oscillator 14 for the electricity generation system of Flow vibration, shape selects cylindrical type, and (oscillator 14 is cylindrical type, outside
Diameter 0.1m, thickness 10mm, length 0.9m), material selection organic glass is made as hollow fillable form.For different examinations
Requirement is tested, by filling different materials, thus it is possible to vary mass of system ratio, this system mass ratio are 4.21；Certainly, shape also may be used
The shapes such as triangular prism, hexagonal prisms are selected as,
Oscillator 14 is connected by linkage 15 becomes excitation generator 6, and linkage 15 is by sliding rack and heavy frame two
It is grouped as, heavy frame and sliding rack consider that aluminum alloy materials can be selected in the requirement of system strength and LP blades, and heavy frame is whole wide
It spends for 1.2m, high 0.9m；Sliding rack size is 1.35m × 1m；Force transmitting board wide 8cm, long 1.2m, thick 6mm；Reynolds number range is 0<
Re<8.4×104；Unified be mounted on is sent out after electricity generation module C should be connected with vibration transmission module B and be carried out waterproof anti-corrosion measure
On conductance stream current stabilization runner 17.
The effect of runner stent 16 is to ensure that current stabilization runner steadily disposes in seabed, selects stainless steel material, is brushed on surface layer
Apply anti-seawater corrosion paint；Support height is 10cm, and one end is fixed on sink mounts, and awkward one end is fixed on marine rock
On.17 size of water conservancy diversion current stabilization runner that generates electricity is 2m × 1.1m.
The specific control method of the utility model device：
(1) oscillator start-up course controls：
Device startup stage adjustable source 10 is powered by external startup power supply 12, the output voltage of adjustable source 10 and
Output current is to become the magnetic induction coil power supply of excitation generator 6.By adjusting supply voltage, reach the generating efficiency of system
Maximum for different flow velocitys, selects optimal generating operation mode；After electricity generation system is stablized, the one of 6 output of excitation generator will be become
Part electric energy is conveyed to adjustable source 10 by motor output line 7, change electric controller 9, power source switching controller 11 so that
The voltage of power supply meets the power reguirements for becoming excitation generator magnetic induction coil；Pass through the external startup power supply of control system simultaneously
12 supply voltage, the output for carrying out electric energy are adjusted, and are finally reached full utilization and are become what excitation generator 6 was powered into magnet exciting coil
Effect is realized and becomes excitation generator magnetic induction coil autoexcitation pattern.Operating process is as shown in Figure 1.
(2) water flow controls：
Due to power budget demand and flow-shape difference, 14 Vibration Condition of oscillator difference, so as to cause to shake
There are larger differences for sub 14 vibrational states.Therefore, it is necessary to water flow and stability are controlled.Therefore, work is devised
Dynamic guide vane 1 controls the size of water flow, and honeycomb barretter 2 and power generation water conservancy diversion current stabilization runner 17 improve the stability of flow, from
And ensure the stabilization of the vibration of oscillator 14 and the output of good electric energy.Specific control method：It is controlled by the aperture for adjusting guide vane 1
Into the water of air stream enter runner, honeycomb barretter 2 stablizes the fluidised form of flow, and it is real to finally enter power generation water conservancy diversion current stabilization runner 17
The control of the size and flow stability of flow in existing runner.
Claims (6)
1. the Flow vibration power generator that a kind of excitation automatically supplies, it is characterized in that：By guide vane (1), honeycomb barretter (2), first
Stent (3), gear set (5), becomes excitation generator (6), motor output line (7), separate excitation power cord (8), becomes second support (4)
Electric controller (9), adjustable source (10), power source switching controller (11), external startup power supply (12), transformation device (13),
Oscillator (14), linkage (15), runner stent (16), power generation water conservancy diversion current stabilization runner (17) form；
Wherein guide vane (1), honeycomb barretter (2) and power generation water conservancy diversion current stabilization runner (17) form water conservancy diversion current stabilization flow-path module A, gear
Group (5), oscillator (14) and linkage (15) composition vibration transmission module B, become excitation generator (6), motor output line (7),
Separate excitation power cord (8) becomes electric controller (9), adjustable source (10), power source switching controller (11), external startup power supply
(12), transformation device (13) composition electricity generation module C；
Guide vane (1) controls rectangle mounted on the rectangular cross section of power generation water conservancy diversion current stabilization runner (17) and the junction of necked-down section
The water inlet aperture of runner port；
Honeycomb barretter (2) plays the role of the current stabilization to ocean current, is fixed on rectangularl runner entrance close to guide vane (1)；
First support (3) becomes excitation generator (6) for fixing gear set (5), second support (4) for fixed；
Gear set (5) is fixed in first support (3), and the mechanical energy of oscillator (14) is passed through linkage (15) and gear set
(5) mechanical energy for becoming excitation generator (6) rotor is converted into, vibration transmission module B can be integrally good in land installation and debugging, then
Integral installation is on power generation water conservancy diversion current stabilization runner (17) after being sealed processing；
Become excitation generator (6) to be fixed in second support (4)；
Become excitation generator (6) and transformation device (13) is connected by motor output line (7), transformation device (13) concentrates each power generation
The electric energy of system simultaneously carries out power transformation operation, is transferred to user or is connected to the grid；Become excitation generator (6) and pass through separate excitation power cord
(8) connection becomes electric controller (9), power source switching controller (11) and adjustable source (10), can be to become excitation generator (6)
Magnet exciting coil power supply；Adjustable source (10) connection power source switching controller (11) and external startup power supply (12)；
Oscillator (14) becomes excitation generator (6) by linkage (15) and gear set (5) connection, and linkage (15) is by sliding
Frame and heavy frame two parts composition, electricity generation module C are connected with vibration transmission module B, and carry out unification after waterproof anti-corrosion measure
On power generation water conservancy diversion current stabilization runner (17).
2. the Flow vibration power generator that excitation according to claim 1 automatically supplies, it is characterized in that：Guide vane (1) selection can
8 movable metallic guide vanes of rotation, maximum rotation angle are 90 degree.
3. the Flow vibration power generator that excitation according to claim 1 automatically supplies, it is characterized in that：Honeycomb barretter (2)
The PVC pipe that caliber is 5~20cm is selected, by tubing assembled arrangement.
4. the Flow vibration power generator that excitation according to claim 1 automatically supplies, it is characterized in that：First support (3),
Two stents (4) select anti-seawater corrosion material or select common stainless steel material, and on common stainless steel material surface layer
Carry out anti-corrosion treatment.
5. the Flow vibration power generator that excitation according to claim 1 automatically supplies, it is characterized in that：Further, system
It is to become the magnetic induction coil power supply of excitation generator (6) by external startup power supply (12) during startup；When fluid stable, electric energy
Output is stablized, and part power generation electric energy at this time is exported, then switched by power supply and controlled by motor output line (7), change electric controller (9)
Device (11) processed, which supplies the electric energy, becomes excitation generator (6)；Then, by external startup power supply (12), gradually transition is excitation electric energy
Generator automatically supplies electric energy, and target is automatically supplied so as to fulfill system excitation electric energy.
6. the Flow vibration power generator that excitation according to claim 1 automatically supplies, it is characterized in that：Oscillator (14) shape can
The shapes such as triangular prism, hexagonal prisms, cylinder are selected as, pmma material is selected, is made as hollow fillable form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720965771.3U CN207485588U (en) | 2017-08-04 | 2017-08-04 | The Flow vibration power generator that a kind of excitation automatically supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720965771.3U CN207485588U (en) | 2017-08-04 | 2017-08-04 | The Flow vibration power generator that a kind of excitation automatically supplies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207485588U true CN207485588U (en) | 2018-06-12 |
Family
ID=62484607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720965771.3U Active CN207485588U (en) | 2017-08-04 | 2017-08-04 | The Flow vibration power generator that a kind of excitation automatically supplies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207485588U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503875A (en) * | 2017-08-04 | 2017-12-22 | 天津大学 | The Flow vibration TRT and control method that a kind of excitation automatically supplies |
-
2017
- 2017-08-04 CN CN201720965771.3U patent/CN207485588U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503875A (en) * | 2017-08-04 | 2017-12-22 | 天津大学 | The Flow vibration TRT and control method that a kind of excitation automatically supplies |
| CN107503875B (en) * | 2017-08-04 | 2023-01-31 | 天津大学 | Excitation self-supply flow-induced vibration power generation device and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101469662A (en) | Waterpipe generator | |
| CN207485588U (en) | The Flow vibration power generator that a kind of excitation automatically supplies | |
| Phankong et al. | Modeling of grid-connected with permanent magnet synchronous generator (PMSG) using voltage vector control | |
| CN201810462U (en) | Pipeline type hydroturbine power generator | |
| CN107503875A (en) | The Flow vibration TRT and control method that a kind of excitation automatically supplies | |
| Safdar et al. | Empirical analysis of turbine and generator efficiency of a pico hydro system | |
| TW200925408A (en) | Water pipe electrical generator | |
| Gianto et al. | Modeling of SCIG-Based Variable Speed Wind Turbine in Power Factor Control Mode for Load Flow Analysis | |
| CN101383577B (en) | Largest wind energy tracing control method for electricity excitation double cam wind power generator system | |
| CN102710096B (en) | The magneto hydrodynamic direct-current generating device of working medium is made of nano conductive liquid | |
| Wang et al. | Key technologies of wave energy power generation system | |
| CN218117949U (en) | Water flow power generation device for water plant water inlet pipe | |
| RU130639U1 (en) | LOW HYDRAULIC POWER PLANT | |
| CN206533145U (en) | Water-storage device based on asynchronous machine | |
| CN201334984Y (en) | Micro power generation device of domestic tap water pipe | |
| CN115030858B (en) | Distributed ocean current energy water turbine control power generation system based on intelligent optimization of clusters | |
| Tsai et al. | Design and implementation of an fpga-based digital control ic of maximum-power-point-tracking charger for vertical-axis wind turbine generators | |
| Chang et al. | Optimization and feasibility analysis of pico-hydro generation system used in small agricultural pipe network | |
| CN204900146U (en) | Dive formula power generation facility | |
| CN206332596U (en) | Hua Yuanbeng uses DC electric machine | |
| Li et al. | Wave power generation and its feasibility in Hong Kong | |
| Song et al. | Development of vertical axial wind turbine driven by three hastate windmill and permanent magnet generator | |
| CN202524238U (en) | Cycle power generation device of slow-speed permanent magnet direct-driven generator | |
| Tessarolo et al. | Traditional hydropower plant revamping based on a variable-speed surface permanent-magnet high-torque-density generator | |
| Chomat et al. | Optimal control of power unit with doubly fed machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |