CN207891386U - A kind of quenching tank that temperature is constant - Google Patents
A kind of quenching tank that temperature is constant Download PDFInfo
- Publication number
- CN207891386U CN207891386U CN201820142758.2U CN201820142758U CN207891386U CN 207891386 U CN207891386 U CN 207891386U CN 201820142758 U CN201820142758 U CN 201820142758U CN 207891386 U CN207891386 U CN 207891386U
- Authority
- CN
- China
- Prior art keywords
- oil
- quenching tank
- cooling
- pipe
- quenching
- 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.)
- Expired - Fee Related
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The utility model discloses a kind of quenching tanks that temperature is constant, including quenching tank and cooling tower, the quenching tank side is provided with oil return pipe, the other side is provided with oil pick-up tube, and the oil return pipe is arranged on the top of the quenching tank, the oil pick-up tube is arranged in the lower part of the quenching tank, the side-lower of the oil discharge outlet of the oil return pipe is provided with stirring wheel, cooling can be stirred to quenching oil, the stirring wheel is mounted on by fixing axle in the quenching tank, and the stirring wheel is rotatablely connected with the fixing axle by bearing.Advantageous effect is:Make the quenching oil circulating cooling in the quenching tank by the circulating cooling pipe, avoid high oil temperature and deterioration, to ensure the cooling capacity of quenching oil;Cooling water is sprayed to the circulating cooling pipe by the nozzle from both sides, to improve the cooling efficiency of cooling water, and is carried out air discharging and radiating using the unpowered blast cap, can both be reduced energy consumption, radiating efficiency also can be improved.
Description
Technical field
The utility model is related to Field of Heat-treatment, and in particular to a kind of quenching tank that temperature is constant.
Background technology
Quenching is that metal works are heated to a certain proper temperature and are kept for a period of time, is immersed immediately fast in quenching media
The metal heating processing technology of quickly cooling but, the purpose of quenching are that overcooling austenite is made to carry out martensite or bainite transformation, obtain horse
Then family name's body or bainite structure coordinate the tempering with different temperatures, to greatly improve intensity, hardness, wearability, the fatigue of steel
Intensity and toughness etc., to meet the different requirements of various machine components and tool.
Applicants have discovered that at least there is following technical problem in the prior art:When quenching tank running hours, quenching is situated between
The temperature of matter can gradually rise, and the temperature gradient of workpiece and hardening media is made to become smaller, and to reduce cooling capacity, and work as and quench
When fiery medium is oils, excessively high temperature will also accelerate the deterioration of quenching oil.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides a kind of quenching tank that temperature is constant, with solution
Certainly hardening media temperature is easy to increase in the prior art, and cooling capacity is caused to decline, and the technical problems such as oily rapid degradation.
Preferred technical solution has in many technical solutions provided by the utility model:Quenching oil is set to circulate, and by described
Cooling tower cools down quenching oil, to ensure the constant equal technique effects of the temperature of quenching oil, elaboration as detailed below.
To achieve the above object, the utility model provides following technical scheme:
A kind of constant quenching tank of temperature provided by the utility model, including quenching tank and cooling tower, the quenching tank one
Side is provided with oil return pipe, and the other side is provided with oil pick-up tube, and the oil return pipe is arranged in the top of the quenching tank, the oil pumping
Pipe is arranged in the lower part of the quenching tank, and the side-lower of the oil discharge outlet of the oil return pipe is provided with stirring wheel, can be to quenching oil
It is stirred cooling, the stirring wheel is mounted on by fixing axle in the quenching tank, and the stirring wheel and the fixing axle
It is rotatablely connected by bearing;It is provided with driving mechanism above the stirring wheel, the stirring wheel can be driven to overturn;
Control valve is installed, the oil discharge outlet of the control valve is connected with circulating cooling pipe, institute on the outside of the oil pick-up tube
It states and is stretched into the middle part of circulating cooling pipe in the cooling tower;
Be taper at the top and bottom of the cooling tower, and top is equipped with unpowered blast cap, the cooling tower it is interior
Wall both sides are uniformly distributed nozzle, and the nozzle is located at the both sides of the circulating cooling pipe, is arranged on the inside of the nozzle
There is water cavity, the water cavity is located on the side wall of the cooling tower, and the water cavity is connected with the nozzle, the water cavity upper end
It is connected with cooling water pipe, the cooling water pipe is welded to connect with the cooling tower, the other end and cooling water of the cooling water pipe
Pump is connected, and the cooling water pump is fixed by the bracket on the cooling tower;The bottom of the cooling tower is provided with draining
Pipe;
Be provided with oil well pump below the cooling water pump, the circulating cooling pipe pass through after the cooling tower with the pumping
Oil pump is connected, and the oil outlet of the oil well pump is connected with the oil return pipe;
Thermocouple and controller, and the thermocouple, the control valve, institute are also equipped on the lateral wall of the quenching tank
It states cooling water pump and the oil well pump is electrically connected with the controller.
Using a kind of above-mentioned quenching tank that temperature is constant, described cooling water pump one end connects cooling water source, the drainpipe
One end connects rinse bath, and in quenching process, the thermocouple is detected the temperature of the quenching tank, when temperature is higher than institute
When stating the setting temperature in controller, the control valve is opened, while the cooling water pump, the oil well pump and the driving
Mechanism is opened simultaneously, and the oil well pump has the quenching in the quenching tank is pumped into the circulating cooling pipe through the oil pick-up tube
Interior, for the circulating cooling pipe after entering the cooling tower, cooling water is sent into institute by the cooling water pump through the cooling water pipe
Water cavity is stated, cooling water is made to spray to the circulating cooling pipe through the nozzle, the quenching oil in the circulating cooling pipe is dropped
Temperature, generated hot gas under the action of the unpowered blast cap by being discharged at the top of the cooling tower, described in water after cooling warp
Drainpipe is sent into rinse bath, and quenching oil after cooling enters the oil return pipe through the oil well pump, sent again by the oil return pipe
Enter the quenching tank, meanwhile, the driving mechanism drives the stirring wheel rotation, the oil that the oil return pipe is discharged is pushed to described
The other side of quenching tank, to accelerate the cooling velocity of quenching oil, when oil temperature is down to the setting value of the controller, the control
Valve, the cooling water pump, the oil well pump and the driving mechanism processed are closed.
Preferably, overflow pipe is additionally provided on the quenching tank, and the installation site of the overflow pipe is returned less than described
Oil pipe.
Preferably, the stirring wheel includes turntable and toothed disc, the toothed disc is arranged on the outside of the turntable, described
It is provided with blade on the periphery of turntable.
Preferably, the driving mechanism, which includes driving gear, drive shaft and driving motor, the drive shaft, passes through bearing
On the quenching tank, the driving gear is fixedly mounted in the drive shaft, and the driving gear and the tooth
Wheel disc is meshed, and one end of the drive shaft is connected by shaft coupling with the output shaft of the driving motor, the driving electricity
Machine is mounted on the outside of the quenching tank by bolt.
Preferably, the stirring wheel and the driving gear it is equal there are two, be separately positioned on close to the quenching tank
Front and rear sides face.
Preferably, the circulating cooling pipe is made of copper pipe, and it is snakelike laterally to arrange.
Preferably, the unpowered blast cap is air draft blast cap.
Advantageous effect is:1, the utility model makes the quenching oil in the quenching tank recycle by the circulating cooling pipe
It is cooling, high oil temperature and deterioration are avoided, to ensure the cooling capacity of quenching oil;
2, cooling water is sprayed to the circulating cooling pipe by the nozzle from both sides, to improve the cooling efficiency of cooling water,
And air discharging and radiating is carried out using the unpowered blast cap, energy consumption can be both reduced, radiating efficiency also can be improved;
3, quenching oil after cooling is stirred using the stirring wheel, to keep the quenching oil in the quenching tank fast
Prompt drop temperature.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the front view of the utility model;
Fig. 2 is the quenching tank vertical view of the utility model;
Fig. 3 is the cooling tower cross-section diagram of the utility model;
Fig. 4 is the stirring wheel schematic enlarged-scale view of the utility model;
Fig. 5 is the control system block diagram of the utility model.
The reference numerals are as follows:
1, quenching tank;2, driving mechanism;201, drive shaft;202, gear is driven;203, driving motor;3, stirring wheel;
301, toothed disc;302, turntable;303, blade;304, fixing axle;4, oil return pipe;5, oil pick-up tube;6, control valve;7, cooling tower;
701, unpowered blast cap;702, cooling water pump;703, cooling water pipe;704, nozzle;705, water cavity;8, oil well pump;9, it recycles cold
But it manages;10, drainpipe;11, thermocouple;12, controller.
Specific implementation mode
It, below will be to the technology of the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
Shown in Fig. 1-Fig. 5, the utility model provides a kind of quenching tank that temperature is constant, including quenching tank 1 and cold
But tower 7,1 side of quenching tank are provided with oil return pipe 4, and the other side is provided with oil pick-up tube 5, and oil return pipe 4 is arranged in the upper of quenching tank 1
Portion, oil pick-up tube 5 are arranged in the lower part of quenching tank 1, and the side-lower of the oil discharge outlet of oil return pipe 4 is provided with stirring wheel 3, can be to quenching
Oil is stirred cooling, and stirring wheel 3 is mounted on by fixing axle 304 in quenching tank 1, and stirring wheel 3 passes through axis with fixing axle 304
Hold rotation connection;3 top of stirring wheel is provided with driving mechanism 2, and stirring wheel 3 can be driven to overturn, so set, convenient for making driving
Mechanism 2 is higher than quenching oil, prevents quenching oil along the connecting portion of driving mechanism 2 and quenching tank 1 to outward leakage;
The outside of oil pick-up tube 5 is equipped with control valve 6, and the oil discharge outlet of control valve 6 is connected with circulating cooling pipe 9, and cycle is cold
But the middle part of pipe 9 is stretched into cooling tower 7;
The top and bottom of cooling tower 7 are taper, and top is equipped with unpowered blast cap 701, the inner wall two of cooling tower 7
Side is uniformly distributed nozzle 704, and nozzle 704 is located at the both sides of circulating cooling pipe 9, and 704 inside of nozzle is provided with water cavity
705, water cavity 705 is located on the side wall of cooling tower 7, and water cavity 705 is connected with nozzle 704, and 705 upper end of water cavity is connected with cooling
Water pipe 703, cooling water pipe 703 are welded to connect with cooling tower 7, and the other end of cooling water pipe 703 is connected with cooling water pump 702, cold
But water pump 702 is fixed by the bracket on cooling tower 7;The bottom of cooling tower 7 is provided with drainpipe 10;
The lower section of cooling water pump 702 is provided with oil well pump 8, and circulating cooling pipe 9 is connected after passing through cooling tower 7 with oil well pump 8
It connects, the oil outlet of oil well pump 8 is connected with oil return pipe 4;
Thermocouple 11 and controller 12, and thermocouple 11, control valve 6, cooling water are also equipped on the lateral wall of quenching tank 1
Pump 702 and oil well pump 8 are electrically connected with controller 12.
Preferably, overflow pipe is additionally provided on quenching tank 1, and the installation site of overflow pipe is less than oil return pipe 4, so sets
It sets, convenient for the quenching oil height in control quenching tank 1, avoids oil level excessively high, blow back into oil return pipe 4.
Stirring wheel 3 includes turntable 302 and toothed disc 301, and the setting of toothed disc 301 is outside 302 outside of turntable, turntable 302
Blade 303 is provided on disc, so set, convenient for being rotated with movable vane piece 303 by turntable 302.
Driving mechanism 2 includes that driving gear 202, drive shaft 201 and driving motor 203, drive shaft 201 are installed by bearing
On quenching tank 1, driving gear 202 is fixedly mounted in drive shaft 201, and gear 202 is driven to be meshed with toothed disc 301,
One end of drive shaft 201 is connected by shaft coupling with the output shaft of driving motor 203, and driving motor 203 is installed by bolt
In the outside of quenching tank 1, so set, convenient for driving drive shaft 201 to rotate by driving motor 203, to make drive shaft 201
It drives driving gear 202 to rotate, and is rotated by 301 driving disc 302 of toothed disc, blade 303 is made to stir quenching oil.
There are two stirring wheel 3 and driving gear 202 are equal, it is separately positioned on close to the front and rear sides face of quenching tank 1.
Circulating cooling pipe 9 is made of copper pipe, and snakelike laterally to arrange, so set, convenient for improving circulating cooling
The heat transfer rate of pipe 9, to make heat Quick diffusing, the spiral coil cooling tube laterally arranged can increase the effective of circulating cooling pipe 9
Cooling length improves effective spray area of cooling water, further increases cooling efficiency.
Unpowered blast cap 701 is air draft blast cap, so set, convenient for extracting the hot gas inside cooling tower 7 out.
Using the above structure, 702 one end of cooling water pump connects cooling water source, and 10 one end of drainpipe connects rinse bath, quenching
During fire, thermocouple 11 is detected the temperature of quenching tank 1, when temperature is higher than the setting temperature in controller 12, control
Valve 6 processed is opened, while cooling water pump 702, oil well pump 8 and driving mechanism 2 are opened simultaneously, and oil well pump 8 is by quenching in quenching tank 1
Fire, which has, to be pumped into through oil pick-up tube 5 in circulating cooling pipe 9, and circulating cooling pipe 9 is after entering cooling tower 7, and cooling water pump 702 is by cooling water
It is sent into water cavity 705 through cooling water pipe 703, so that cooling water is sprayed to circulating cooling pipe 9 through nozzle 704, to quenching in circulating cooling pipe 9
Kerosene cools down, and generated hot gas is discharged under the action of unpowered blast cap 701 by 7 top of cooling tower, water after cooling
It is sent into rinse bath through drainpipe 10, quenching oil after cooling enters oil return pipe 4 through oil well pump 8, quenching is fed again by oil return pipe 4
Slot 1, meanwhile, driving mechanism 2 drives stirring wheel 3 to rotate, and the oil that oil return pipe 4 is discharged is pushed to the other side of quenching tank 1, to add
The cooling velocity of fast quenching oil, when oil temperature is down to the setting value of controller 12, control valve 6, cooling water pump 702,8 and of oil well pump
Driving mechanism 2 is closed.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.
Claims (7)
1. a kind of quenching tank that temperature is constant, it is characterised in that:Including quenching tank(1)And cooling tower(7), the quenching tank(1)
Side is provided with oil return pipe(4), the other side is provided with oil pick-up tube(5), and the oil return pipe(4)It is arranged in the quenching tank(1)
Top, the oil pick-up tube(5)It is arranged in the quenching tank(1)Lower part, the oil return pipe(4)The side-lower of oil discharge outlet set
It is equipped with stirring wheel(3), cooling, the stirring wheel can be stirred to quenching oil(3)Pass through fixing axle(304)Mounted on described
Quenching tank(1)It is interior, and the stirring wheel(3)With the fixing axle(304)It is rotatablely connected by bearing;The stirring wheel(3)On
Side is provided with driving mechanism(2), the stirring wheel can be driven(3)Overturning;
The oil pick-up tube(5)Outside control valve is installed(6), the control valve(6)Oil discharge outlet and circulating cooling pipe(9)Phase
Connection, the circulating cooling pipe(9)Middle part stretch into the cooling tower(7)It is interior;
The cooling tower(7)Top and bottom be taper, and top is equipped with unpowered blast cap(701), the cooling tower
(7)Inner wall both sides uniformly distributed have nozzle(704), and the nozzle(704)It is located at the circulating cooling pipe(9)Two
Side, the nozzle(704)Inside is provided with water cavity(705), the water cavity(705)Positioned at the cooling tower(7)Side wall on, and
The water cavity(705)With the nozzle(704)It is connected, the water cavity(705)Upper end is connected with cooling water pipe(703), described
Cooling water pipe(703)With the cooling tower(7)It is welded to connect, the cooling water pipe(703)The other end and cooling water pump(702)
It is connected, the cooling water pump(702)It is fixed by the bracket and is mounted on the cooling tower(7)On;The cooling tower(7)Bottom set
It is equipped with drainpipe(10);
The cooling water pump(702)Lower section be provided with oil well pump(8), the circulating cooling pipe(9)Across the cooling tower(7)
Afterwards with the oil well pump(8)It is connected, the oil well pump(8)Oil outlet and the oil return pipe(4)It is connected;
The quenching tank(1)Lateral wall on be also equipped with thermocouple(11)And controller(12), and the thermocouple(11), institute
State control valve(6), the cooling water pump(702)And the oil well pump(8)With the controller(12)Electrical connection.
2. a kind of quenching tank that temperature is constant according to claim 1, it is characterised in that:The quenching tank(1)On also set up
There is overflow pipe, and the installation site of the overflow pipe is less than the oil return pipe(4).
3. a kind of quenching tank that temperature is constant according to claim 1, it is characterised in that:The stirring wheel(3)Including turntable
(302)And toothed disc(301), the toothed disc(301)It is arranged in the turntable(302)Outside, the turntable(302)Outer circle
Blade is provided on face(303).
4. a kind of quenching tank that temperature is constant according to claim 3, it is characterised in that:The driving mechanism(2)Including driving
Moving gear(202), drive shaft(201)And driving motor(203), the drive shaft(201)It is mounted on the quenching by bearing
Slot(1)On, the driving gear(202)It is fixedly mounted on the drive shaft(201)On, and the driving gear(202)With institute
State toothed disc(301)It is meshed, the drive shaft(201)One end pass through shaft coupling and the driving motor(203)Output
Axis is connected, the driving motor(203)It is mounted on the quenching tank by bolt(1)Outside.
5. a kind of quenching tank that temperature is constant according to claim 4, it is characterised in that:The stirring wheel(3)With the drive
Moving gear(202)There are two, it is separately positioned on close to the quenching tank(1)Front and rear sides face.
6. a kind of quenching tank that temperature is constant according to claim 1, it is characterised in that:The circulating cooling pipe(9)Using
Copper pipe is made, and snakelike laterally to arrange.
7. a kind of quenching tank that temperature is constant according to claim 1, it is characterised in that:The unpowered blast cap(701)For
Air draft blast cap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820142758.2U CN207891386U (en) | 2018-01-29 | 2018-01-29 | A kind of quenching tank that temperature is constant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201820142758.2U CN207891386U (en) | 2018-01-29 | 2018-01-29 | A kind of quenching tank that temperature is constant |
Publications (1)
Publication Number | Publication Date |
---|---|
CN207891386U true CN207891386U (en) | 2018-09-21 |
Family
ID=63546140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201820142758.2U Expired - Fee Related CN207891386U (en) | 2018-01-29 | 2018-01-29 | A kind of quenching tank that temperature is constant |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN207891386U (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110791632A (en) * | 2019-12-20 | 2020-02-14 | 南京天马轴承有限公司 | Novel roller quenching groove recirculated cooling water energy-saving control device |
CN111014820A (en) * | 2019-12-05 | 2020-04-17 | 上海铭谷民防设备有限公司 | Band sawing machine |
CN112877511A (en) * | 2021-01-13 | 2021-06-01 | 湖北通路汽车零部件股份有限公司 | Quenching water tank circulating cooling temperature control system and method |
CN113667805A (en) * | 2021-07-29 | 2021-11-19 | 宁波晟光金属制品有限公司 | Hot oil heat energy recovery system |
CN115572799A (en) * | 2022-10-26 | 2023-01-06 | 安徽省凤形新材料科技有限公司 | Convection quenching bath for heat treatment of wear-resistant alloy material |
CN116875796A (en) * | 2023-07-14 | 2023-10-13 | 巩义市恒铭金属制品有限公司 | Oil temperature control device for quenching of spring steel wire |
-
2018
- 2018-01-29 CN CN201820142758.2U patent/CN207891386U/en not_active Expired - Fee Related
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111014820A (en) * | 2019-12-05 | 2020-04-17 | 上海铭谷民防设备有限公司 | Band sawing machine |
CN111014820B (en) * | 2019-12-05 | 2021-03-30 | 上海铭谷民防设备有限公司 | Band sawing machine |
CN110791632A (en) * | 2019-12-20 | 2020-02-14 | 南京天马轴承有限公司 | Novel roller quenching groove recirculated cooling water energy-saving control device |
CN112877511A (en) * | 2021-01-13 | 2021-06-01 | 湖北通路汽车零部件股份有限公司 | Quenching water tank circulating cooling temperature control system and method |
CN113667805A (en) * | 2021-07-29 | 2021-11-19 | 宁波晟光金属制品有限公司 | Hot oil heat energy recovery system |
CN115572799A (en) * | 2022-10-26 | 2023-01-06 | 安徽省凤形新材料科技有限公司 | Convection quenching bath for heat treatment of wear-resistant alloy material |
CN116875796A (en) * | 2023-07-14 | 2023-10-13 | 巩义市恒铭金属制品有限公司 | Oil temperature control device for quenching of spring steel wire |
CN116875796B (en) * | 2023-07-14 | 2024-03-19 | 巩义市恒铭金属制品有限公司 | Oil temperature control device for quenching of spring steel wire |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN207891386U (en) | A kind of quenching tank that temperature is constant | |
CN206721268U (en) | Water circulation Cooling Quenching device | |
CN205170928U (en) | Vertical quenching furnace | |
CN111424144B (en) | Quenching process and quenching device thereof | |
CN109439867A (en) | A kind of electricity self-heating hardening device | |
CN208980766U (en) | A kind of martensite steel quenching cooler | |
CN203613225U (en) | Stirring type quenching equipment | |
CN106319172A (en) | Automobile spare part cooling device | |
CN202717811U (en) | Pump type circular mixing device for quenching tank | |
CN205590750U (en) | A quenching groove that is used for in turn thermal treatment ball of water -cooling air cooling | |
CN209619399U (en) | Glowing furnace is used in a kind of heat treatment of transmission shaft | |
CN107236858B (en) | A kind of I. C. engine crankshaft quenching coolant liquid treatment box and its application method | |
CN215560484U (en) | Bearing nut quenching device | |
CN207483786U (en) | A kind of annealing device for alloy spring steel | |
CN216404462U (en) | Be used for high tough aluminum alloy processing guenching unit | |
CN105002334A (en) | Automatic quenching oil groove and quenching method by utilizing automatic quenching oil groove | |
CN109234503A (en) | A kind of quenching unit for barrel-shaped workpiece | |
CN106609317A (en) | Rotary soak quenching device for small-sized carbon steel | |
CN210596167U (en) | Quenching tank stirring device for heat treatment quenching | |
CN2910959Y (en) | Soaking high-temp. quenching of automotive knuckle after being forged | |
CN208328067U (en) | The quenching unit of mesh-belt quenching furnace | |
CN207176009U (en) | Quenching oil cooling device | |
CN207047283U (en) | Cooling water circulation system is used in mechanical workpieces quenching | |
CN201762387U (en) | Novel residual heat quenching device | |
CN206298621U (en) | A kind of axle class rotates quenching unit automatically |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180921 Termination date: 20200129 |