CN206739660U - A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header - Google Patents

A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header Download PDF

Info

Publication number
CN206739660U
CN206739660U CN201720420827.7U CN201720420827U CN206739660U CN 206739660 U CN206739660 U CN 206739660U CN 201720420827 U CN201720420827 U CN 201720420827U CN 206739660 U CN206739660 U CN 206739660U
Authority
CN
China
Prior art keywords
pressure
inner liner
bearing inner
solar thermal
thermal collector
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
Application number
CN201720420827.7U
Other languages
Chinese (zh)
Inventor
汤燕华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haining Huihao Solar Energy Technology Co Ltd
Original Assignee
Haining Huihao Solar Energy Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Haining Huihao Solar Energy Technology Co Ltd filed Critical Haining Huihao Solar Energy Technology Co Ltd
Priority to CN201720420827.7U priority Critical patent/CN206739660U/en
Application granted granted Critical
Publication of CN206739660U publication Critical patent/CN206739660U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers

Landscapes

  • Pressure Vessels And Lids Thereof (AREA)

Abstract

The utility model provides a kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header, belongs to solar thermal collector technical field.It solves existing pressure-bearing inner liner and is welded and fixed with connection end, the problem of easily corroding and cause leakage.The pressure-bearing inner liner of this solar thermal collector header, straight tube-like body including stainless steel, there are several inline connection ends for being used to insert vacuum heat collection pipe on the surface of body, connection end is outwardly and cylindrical, connection end and body be integral type structure, and the port of connection end is with 180 ° of the flange of bending inwards.Pressure-bearing inner liner is integral type structure, compared to being welded to connect, anticorrosion, and good airproof performance, sound construction.

Description

A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header
Technical field
The utility model belongs to solar thermal collector technical field, is related to a kind of pressure-bearing inner liner of solar thermal collector header Processing unit (plant).
Background technology
Solar thermal collector header includes outer case and inner bag, and inner bag is placed in outer case, connector is provided with inner bag, very Empty set heat pipe one end is inserted in outer case and inner bag.In order to improve the sealing effectiveness of junction between inner bag and vacuum heat collection pipe, Toward sleeve pipe is up first welded with connector, vacuum heat collection pipe close-fitting is in sleeve pipe.
The utility model announced such as Chinese patent【The patent No. 201620505336.8】, the utility model discloses a kind of new The water-tight pressure-bearing solar heat collector of type bombing, including the inner bag that solar energy header is connected with solar energy header, solar energy header Heat-insulation layer is set between inner bag, and solar energy header both sides are respectively provided with the connection mouth of pipe, and inner bag includes two and half square inner bags, inner bag It is upper that multiple through holes are set, through hole set be coaxial therewith and with the flange retainer plate of inner bag surface angle in 90 °, flange retainer plate Inside or outside inner bag, the protection sleeve pipe of both ends open is set in through hole, the both ends of protection sleeve pipe are exposed to outside through hole, And protection sleeve pipe is connected with flange retainer plate binding site welded seal.This is simple in construction, and through hole sets flange retainer plate, increases Big inner bag and the direct bonding area of protection pipe, firm welding, while inner bag is two and half square inner tubes, it is convenient to process through hole.
Although this attachment structure improves bonding area, increase firmness, but weld is easy after long-term use Dielectric corrosion in by inner bag and leak, cause sealing effectiveness to be deteriorated.
Utility model content
The purpose of this utility model is above mentioned problem be present for existing technology, it is proposed that a kind of solar thermal collector The pressure-bearing inner liner of header, body and connection end are integral type structure, and anticorrosive property is good, and good sealing effect is easy for installation.
The purpose of this utility model can be realized by following technical proposal:In a kind of pressure-bearing of solar thermal collector header Courage, include the straight tube-like body of stainless steel, it is characterised in that there are several inline to be used to insert on the surface of body Enter the connection end of vacuum heat collection pipe, connection end is outwardly and cylindrical, and connection end and body are integral type structure, connection end Port there is 180 ° of the flange of bending inwards.
Pressure-bearing inner liner is made up of stainless steel material, in the connection end of vacuum heat collection pipe insertion pressure-bearing inner liner, the flange of port On be cased with sealing ring, improve the sealing effectiveness of two junctions, because this pressure-bearing inner liner is integral type structure, connection end is direct A series of punch forming is carried out on body, was weldingly fixed on compared to former connection end on body, the connection of this pressure-bearing inner liner More firmly, sealing effectiveness is more preferable.Because connection end is extrusion forming from inside to outside, so the inner port diameter of connection end is bigger In external port diameter, cause the wall of connection end to have certain gradient, in order to improve the contact surface of connection end and vacuum heat collection pipe, Therefore by designing the form of inside flange, contacted by flange with vacuum heat collection pipe, and the angle of flange is in processing Controllable, so flange is designed to and vacuum heat-collecting pipe surface close-fitting.This pressure-bearing inner liner is connected with vacuum heat collection pipe need not Welding, integral structure good airproof performance, it is only necessary to sealing ring is covered on connection end, then vacuum heat collection pipe is inserted into connection end , installation is also convenient for.
Further, the axial line of the connection end perpendicular to body axial line and both be in same plane.
Further, the height of the flange is less than the height of connection end.
Further, the connection end is equally spaced along the length direction of body, the wall thickness and body of the connection end Wall thickness it is identical.
The invention also discloses a kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header, including briquetting, drift, Outer core, inner core, pull bar and fixed seat, it is characterised in that outer core is in straight tube-like and is slidably fitted in pressure-bearing inner liner body, Outer core surface is provided with two axisymmetric side punchings and a upper forming hole, and fixed seat is welded and fixed in outer in-core, fixed Seat is in T fonts and provided with the dumping pit extended transversely through, and side punching is overlapping with dumping pit, and the drift is driven by hydraulic cylinder one to be made Move horizontally and can extend into dumping pit, inner core is cylindrical and upper surface is provided with flange groove, and inner core is embedded in upper forming hole And can be slided along upper forming hole, briquetting is cylindrical to be driven work vertically movable and can extend into upper forming hole by hydraulic cylinder two Interior, pull bar moves located at fixed seat upper surface and along outer wire mandrel, and pull bar tail end stretches out outer core and is connected with telescopic cylinder, is drawing The front end of bar has raised jacking part, and the jacking part has inclined-plane one, and the inner core lower surface leans with pull bar, inside Core lower end has the inclined-plane two relative with inclined-plane one, and inclined-plane one and inclined-plane two are parallel to each other, and this processing unit (plant) also includes traction gas Cylinder and motor, the output shaft of motor is connected with traction cylinder and drives traction rotational cylinder, so the push rod front end of traction cylinder The clamping head of pressure-bearing inner liner can be clamped by being connected with.
Drawing cylinder pulls pressure-bearing inner liner to advance, and when reaching station and stopping to be added, starts hydraulic cylinder one, drift and outer core Side punching coordinate, aperture is stamped out on pressure-bearing inner liner;Pressure-bearing inner liner is moved along a segment distance, Ran Houyi after punching aperture Pressure-bearing inner liner is set to rotate 90 ° by the output shaft of motor, traction cylinder promotes pressure-bearing inner liner to be moved to original position backward, is directed at aperture Upper forming hole.Start telescopic cylinder, pull pull bar to be moved rearwards, make the forward ends thereof inner core of pull bar, inclined-plane one and inclined-plane two paste Close, inner core is moved up under the active force of pull bar, and connection end is squeezed out in the aperture position of pressure-bearing inner liner.Start hydraulic cylinder two, pressure Block is pressed down against aperture, by coordinating with the flange groove of inner core, the port edge of connection end is bent inwards, is turned over so as to be formed Side.
Further, the axis of upper forming hole intersects and vertical with the axis of side punching.
Further, the drift, side punching, dumping pit are position ellipse.The aperture of ellipse, punching are formed after punching Waste material behind hole is stayed in dumping pit, outer core is departed from after whole pressure-bearing inner liner processes, then waste material is taken out from dumping pit.
Further, the fixed seat upper surface is welded with two baffle plates, and pull bar is between two baffle plates.Baffle plate For limiting pull bar, pull bar is moved straight, prevent pull bar from being swung in movement.
Further, the inclination angle on inclined-plane one and inclined-plane two is 45 °.Pull bar moves horizontally, pull bar extruding inner core, Inner core moves up.
Further, three end faces of the fixed seat are arc surface and are leant with the inwall of outer core and pass through welding It is fixed.
Compared with prior art, the processing unit (plant) of the pressure-bearing inner liner of this solar thermal collector header has advantages below:
1. pressure-bearing inner liner is integral type structure, compared to being welded to connect, anticorrosion, good airproof performance, sound construction.
It is made, is easily deformed 2. present pressure-bearing inner liner is mostly copper product, easily leakage, this pressure-bearing inner liner is stainless steel Material, hardness are big, it is not easy to deform, service life length.
3. a processing unit (plant) integrates punching, shaping, flange, without welding and being fabricated separately connection end, out of pressure-bearing Connection end is stamped out on courage body, simplifies technique, process velocity is fast, substantially increases production capacity.
4. automaticity is high in process, each power source can be fully relied on and be automatically performed, reduce cost of labor.
Brief description of the drawings
Fig. 1 is the structural representation of the pressure-bearing inner liner of this solar thermal collector header.
Fig. 2 is the partial sectional view of the pressure-bearing inner liner of this solar thermal collector header.
Fig. 3 is the outer core inner structure schematic cross-sectional view of the processing unit (plant) of the pressure-bearing inner liner of this solar thermal collector header.
Fig. 4 is the positive structure diagram of the processing unit (plant) of the pressure-bearing inner liner of this solar thermal collector header.
Fig. 5 is the side structure schematic view of the processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header.
Fig. 6 is the fiting relation figure of inner core, pull bar and fixed seat.
Fig. 7 is the structural representation of fixed seat.
In figure, 1, body;2nd, connection end;3rd, flange;4th, briquetting;5th, drift;6th, outer core;7th, inner core;8th, pull bar;9th, it is fixed Seat;10th, side punching;11st, upper forming hole;12nd, dumping pit;13rd, hydraulic cylinder one;14th, flange groove;15th, hydraulic cylinder two;16th, stretch Cylinder;17th, jacking part;18th, inclined-plane one;19th, inclined-plane two;20th, cylinder is drawn;21st, motor;22nd, baffle plate;23rd, clamping head.
Embodiment
It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.
As shown in Figure 1 and Figure 2, the pressure-bearing inner liner of this solar thermal collector header includes the straight tube-like body 1 of stainless steel, The surface of body 1 is outwardly with several inline connection ends 2 for being used to insert vacuum heat collection pipe, connection end 2 And it is cylindrical, connection end 2 and body 1 be integral type structure, and the port of connection end 2 is with 180 ° of the flange 3 of bending inwards.
The axial line of connection end 2 perpendicular to body 1 axial line and both be in same plane, the height of the flange 3 Degree is less than the height of connection end 2, and length direction of the connection end 2 along body 1 is equally spaced, the wall thickness of the connection end 2 It is identical with the wall thickness of body 1.
Pressure-bearing inner liner is made up of stainless steel material, in the connection end 2 of vacuum heat collection pipe insertion pressure-bearing inner liner, the flange of port Sealing ring is cased with 3, improves the sealing effectiveness of two junctions, because this pressure-bearing inner liner is integral type structure, connection end 2 is straight It is connected on body 1 and carries out a series of punch forming, was weldingly fixed on compared to former connection end 2 on body 1, this pressure-bearing inner liner Connection is more firm, and sealing effectiveness is more preferable.Because connection end 2 is extrusion forming from inside to outside, so the inner port of connection end 2 is straight Footpath is slightly larger than external port diameter, causes the wall of connection end 2 to have certain gradient, in order to improve connection end 2 and vacuum heat collection pipe Contact surface, therefore by designing the form of inside flange 3, contacted by flange 3 with vacuum heat collection pipe, and the angle of flange 3 Degree is controllable in processing, so flange 3 is designed to and vacuum heat-collecting pipe surface close-fitting.This pressure-bearing inner liner and vacuum heat-collecting Pipe connection need not weld, integral structure good airproof performance, it is only necessary to cover sealing ring on connection end 2, then by vacuum heat collection pipe It is inserted into connection end 2, installation is also convenient for.
As shown in Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, the processing unit (plant) of the pressure-bearing inner liner of this solar thermal collector header includes Briquetting 4, drift 5, outer core 6, inner core 7, pull bar 8 and fixed seat 9, outer core 6 is in straight tube-like and is slidably fitted in pressure-bearing inner liner body 1 Interior, the outer surface of core 6 is provided with two axisymmetric side punchings 10 and a upper forming hole 11, and fixed seat 9 is welded and fixed in outer core 6 Interior, fixed seat 9 is in T fonts and overlapping with dumping pit 12 provided with the dumping pit 12 extended transversely through, side punching 10.
Drift 5 can be moved horizontally and can extend into dumping pit 12 by the driving of hydraulic cylinder 1, inner core 7 it is cylindrical and Upper surface is provided with flange groove 14, and inner core 7 is embedded in upper forming hole 11 and can slided along upper forming hole 11, and briquetting 4 is cylindrical Driven by hydraulic cylinder 2 15 and make vertically movable and can extend into upper forming hole 11.
Pull bar 8 moves located at the upper surface of fixed seat 9 and along the outer axis of core 6, and the tail end of pull bar 8 stretches out outer core 6 and flexible gas Cylinder 16 connects, and has raised jacking part 17 in the front end of pull bar 8, and the jacking part 17 has an inclined-plane 1, under the inner core 7 End face leans with pull bar 8, has the inclined-plane two 19 relative with inclined-plane 1, inclined-plane 1 and inclined-plane 2 19 in the lower end of inner core 7 It is parallel to each other.The inclination angle on inclined-plane 1 and inclined-plane 2 19 is 45 °.Pull bar 8 moves horizontally, and pull bar 8 extrudes inner core 7, interior Core 7 moves up.
This processing unit (plant) also includes traction cylinder 20 and motor 21, and the output shaft of motor 21 is connected with traction cylinder 20 and band Dynamic traction cylinder 20 rotates, and the push rod front end of traction cylinder 20 is connected with the clamping head 23 that can clamp pressure-bearing inner liner.
The axis of upper forming hole 11 intersects and vertical with the axis of side punching 10.Drift 5, side punching 10, dumping pit 12 are equal For position ellipse.The aperture of ellipse is formed after punching, the waste material after punching is stayed in dumping pit 12, when whole pressure-bearing inner liner adds Depart from outer core 6 after work is complete, then waste material is taken out from dumping pit 12.The upper surface of fixed seat 9 is welded with two baffle plates 22, pull bar 8 between two baffle plates 22, and three end faces of fixed seat 9 are arc surface and are leant with the inwall of outer core 6 and pass through weldering Connect fixation.Baffle plate 22 is used to limit pull bar 8, pull bar 8 is moved straight, prevents pull bar 8 from being swung in movement.
Drawing cylinder 20 pulls pressure-bearing inner liner to advance, and when reaching station and stopping to be added, starts hydraulic cylinder 1, drift 5 Coordinate with the side punching 10 of outer core 6, aperture is stamped out on pressure-bearing inner liner;Pressure-bearing inner liner punch be moved along after aperture one section away from From, then by the output shaft of motor 21 make pressure-bearing inner liner rotate 90 °, traction cylinder 20 promote pressure-bearing inner liner be moved to original backward Position, make the upper forming hole 11 of aperture alignment.Start telescopic cylinder 16, pull pull bar 8 to be moved rearwards, in the forward ends thereof for making pull bar 8 Core 7, inclined-plane 1 and inclined-plane 2 19 are bonded, and inner core 7 moves up under the active force of pull bar 8, is squeezed in the aperture position of pressure-bearing inner liner Extrude connection end 2.Start hydraulic cylinder 2 15, briquetting 4 is pressed down against aperture, coordinates by the flange groove 14 with inner core 7, make connection The port edge at end 2 bends inwards, so as to form flange 3.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Claims (6)

1. a kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header, including briquetting, drift, outer core, inner core, pull bar and Fixed seat, it is characterised in that outer core is in straight tube-like and is slidably fitted in pressure-bearing inner liner body, and outer core surface is provided with Two axisymmetric side punchings and a upper forming hole, fixed seat are welded and fixed in outer in-core, and fixed seat is in T fonts and provided with horizontal stroke To through dumping pit, side punching is overlapping with dumping pit, and the drift is driven by hydraulic cylinder one can move horizontally and can stretch into Into dumping pit, inner core is cylindrical and upper surface is provided with flange groove, and inner core is embedded in upper forming hole and can be along upper forming hole Slide, briquetting is cylindrical to be driven work vertically movable by hydraulic cylinder two and can be extend into upper forming hole, and pull bar is located at fixed seat Upper surface and moved along outer wire mandrel, pull bar tail end stretches out outer core and is connected with telescopic cylinder, in the front end of pull bar with raised Jacking part, the jacking part has inclined-plane one, and the inner core lower surface leans with pull bar, has in inner core lower end and inclined-plane One relative inclined-plane two, inclined-plane one and inclined-plane two are parallel to each other, and this processing unit (plant) also includes traction cylinder and motor, motor it is defeated Shaft is connected with traction cylinder and drives traction rotational cylinder, so the push rod front end of traction cylinder, which is connected with, can clamp pressure-bearing The clamping head of inner bag.
2. the processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header according to claim 1, it is characterised in that on into The axis of type hole intersects and vertical with the axis of side punching.
3. the processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header according to claim 1, it is characterised in that described Drift, side punching, dumping pit are position ellipse.
4. the processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header according to claim 1, it is characterised in that described Fixed seat upper surface is welded with two baffle plates, and pull bar is between two baffle plates.
5. the processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header according to claim 1, it is characterised in that inclined-plane One with the inclination angle on inclined-plane two is 45 °.
6. the processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header according to claim 1, it is characterised in that described Three end faces of fixed seat are arc surface and leant and with the inwall of outer core by being welded and fixed.
CN201720420827.7U 2017-04-20 2017-04-20 A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header Expired - Fee Related CN206739660U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720420827.7U CN206739660U (en) 2017-04-20 2017-04-20 A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720420827.7U CN206739660U (en) 2017-04-20 2017-04-20 A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header

Publications (1)

Publication Number Publication Date
CN206739660U true CN206739660U (en) 2017-12-12

Family

ID=60561610

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720420827.7U Expired - Fee Related CN206739660U (en) 2017-04-20 2017-04-20 A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header

Country Status (1)

Country Link
CN (1) CN206739660U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106940097A (en) * 2017-04-20 2017-07-11 海宁汇豪太阳能科技有限公司 A kind of pressure-bearing inner liner and its processing unit (plant) of solar thermal collector header
CN113523093A (en) * 2021-07-14 2021-10-22 尹大法 Synchronous double-stamping type solar heat collecting pipe inner container round hole flanging equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106940097A (en) * 2017-04-20 2017-07-11 海宁汇豪太阳能科技有限公司 A kind of pressure-bearing inner liner and its processing unit (plant) of solar thermal collector header
CN113523093A (en) * 2021-07-14 2021-10-22 尹大法 Synchronous double-stamping type solar heat collecting pipe inner container round hole flanging equipment
CN113523093B (en) * 2021-07-14 2023-08-25 中山森特能源科技有限公司 Synchronous double-stamping type flanging equipment for round holes of inner containers of solar heat collecting tubes

Similar Documents

Publication Publication Date Title
CN106964692B (en) A kind of processing technology and its processing unit (plant) of pressure-bearing inner liner
CN206739660U (en) A kind of processing unit (plant) of the pressure-bearing inner liner of solar thermal collector header
CN106180280B (en) One kind is used for heavy caliber seamless steel pipe end sizing method
CN100484697C (en) Pressing sealing method and structure of heat pipe
CN203979691U (en) A kind of socket welding type copper-aluminium joint
CN106940097A (en) A kind of pressure-bearing inner liner and its processing unit (plant) of solar thermal collector header
CN100462662C (en) Heat pipe pressing sealing method
CN211667336U (en) Whole internal stay formula all-metal cladding anticreep connection structure
CN209484114U (en) A kind of structure enhancing expansion bend sealing performance
CN107520275A (en) A kind of method that HTHP thick-wall seamless road squeezes the curved combined shaping of forging
CN107062660B (en) End sealing structure of metal straight-through vacuum heat collecting pipe
CN107186023A (en) The component and its manufacture method of the compact shape of flat serpentine coil pipe radiating and ventilating water heater
CN104646967A (en) Pressure-bearing water heater liner and method for processing pressure-bearing water heater liner
CN102706014A (en) Solderless multi-material composite solar thermal collector board core of thin wall/thick wall diversion pipe
CN211145648U (en) Welding-free connecting pipe joint
CN100462661C (en) Heat pipe pressing sealing method
CN207914456U (en) A kind of bend pipe thickens tooling
CN203227755U (en) Heat collection square tube seamer of solar water heating system
CN207103456U (en) One kind radiating tube extruding press
CN209926658U (en) Condenser input tube assembly for air conditioner
CN105127218A (en) Novel preparation method of high-pressure nanocrystalline 15CrMoG alloy tube
CN212384425U (en) Thin-wall round tube closing tool
CN210411949U (en) Salt field salt conveying pipeline joint forming device
CN218591464U (en) Wire drawing mould and fine enameled wire production equipment
CN204647654U (en) The bigbore novel three-way pipe fitting of X80-X100 grade of steel

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: 20171212

Termination date: 20200420