CN107759072A - Full-automatic optical fibre drawing cooling system and cooling means - Google Patents
Full-automatic optical fibre drawing cooling system and cooling means Download PDFInfo
- Publication number
- CN107759072A CN107759072A CN201711105071.8A CN201711105071A CN107759072A CN 107759072 A CN107759072 A CN 107759072A CN 201711105071 A CN201711105071 A CN 201711105071A CN 107759072 A CN107759072 A CN 107759072A
- Authority
- CN
- China
- Prior art keywords
- bushing pipe
- cooling tube
- cooling
- full
- optical fibre
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
- C03B37/02718—Thermal treatment of the fibre during the drawing process, e.g. cooling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention discloses a kind of Full-automatic optical fibre drawing cooling system, including cooling tube, bushing pipe is provided with the cooling tube, the cooling tube is provided with the stomata being connected with bushing pipe, inert gas is passed through into bushing pipe by the stomata;The both ends of the cooling tube are connected to together on axial adjustment platform, temperature measurer is equipped with the two same axial adjustment platforms, the temperature measurer is used for position and the surface temperature for detecting die ontology fine hole inner fiber, the temperature measurer connects controller, with axial adjustment platform, the temperature value adjustment that the controller feeds back according to temperature measurer is passed through the inert gas flow in bushing pipe for the controller control connection.The Full-automatic optical fibre drawing cooling system of the present invention, position and the inert gas charge flow rate of cooling tube can be automatically controlled and adjusted during high-speed wire-drawing, the dosage of inert gas is saved while ensureing that optical fiber cooling effect is good, reduces production cost, it is good airproof performance, easy to clean.
Description
Technical field
The present invention relates to a kind of Full-automatic optical fibre drawing cooling system, further relates to a kind of optical cable wire drawing cooling means.
Background technology
Under existing preform drawing process speed, the temperature of optical fiber plug for outlet is about 2000 DEG C, and with drawing
The lifting of silk speed, the temperature of optical fiber plug for outlet can be higher, and wire drawing passage has been not enough to complete the cooling before optical fiber coating, if
Do not increase cooling tube to cool down optical fiber before coating, will occur during optical fiber coating and emit the productions such as glue exception, and influence to give birth to
Produce efficiency and optical fiber quality.Traditional cooling tube is the cooling tube of 2 pieces of semilune aluminums, and inner chamber is uniformly embedded with multi-disc grid, no
It is easy to clean, the foreign matter of residual or broken optical fiber can have a strong impact on the intensity of optical fiber in lasting drawing process;Sealing effectiveness is poor, helium
Dosage is big;Opening and closing process easily causes disconnected fibre, influences optical fiber production efficiency.
The content of the invention
The present invention provides a kind of Full-automatic optical fibre drawing cooling system, can automatically control and adjust during high-speed wire-drawing
The position of whole cooling tube and inert gas charge flow rate, the use of inert gas is saved while ensureing that optical fiber cooling effect is good
Amount, production cost is reduced, it is good airproof performance, easy to clean.
In order to solve the above-mentioned technical problem, the invention provides a kind of Full-automatic optical fibre drawing cooling system, including cooling
Pipe, bushing pipe, the cooling tube and bushing pipe are provided with the cooling tube provided with the stomata being connected, by the stomata to bushing pipe
Inside it is passed through inert gas;The both ends of the cooling tube are connected to together on axial adjustment platform, the two same axial adjustment platforms
On be equipped with temperature measurer, the temperature measurer is used for position and the surface temperature for detecting die ontology fine hole inner fiber, the temperature measurer connection
Controller, with axial adjustment platform, the temperature value that the controller feeds back according to temperature measurer adjusts logical for the controller control connection
Enter the inert gas flow in bushing pipe.
In a preferred embodiment of the present invention, it is polytetrafluoroethylene (PTFE) bushing pipe to further comprise the bushing pipe.
In a preferred embodiment of the present invention, further comprise that the stomata is arranged in cooling length of tube bearing of trend
Between position and cooling tube be located at the end that optical fiber passes.
In a preferred embodiment of the present invention, it is helium to further comprise the inert gas.
In a preferred embodiment of the present invention, further comprise between the inner and outer wall of the cooling tube spiral shell from bottom to top
Rotation shape coiling is provided with liquid cold trap, and coolant is passed through in the liquid cold trap.
In a preferred embodiment of the present invention, further comprise that the both ends of the liquid cold trap are connected to cooling by water pipe
Cyclic water tank.
In a preferred embodiment of the present invention, further comprise the cylindric body that the cooling tube is integral type structure.
In a preferred embodiment of the present invention, it is stainless steel tube to further comprise the cooling tube.
In a preferred embodiment of the present invention, further comprise that it also includes control panel, the control panel electrical connection
Controller, the control panel show current location and the Current Temperatures of optical fiber, and receive the operation setting of user.
In order to solve the above-mentioned technical problem, present invention also offers a kind of drawing optical fibers cooling means, comprise the following steps,
(1) bushing pipe is taken to be nested in cooling tube, the both ends of bushing pipe and cooling tube are respectively arranged on together axial adjustment platform
On, with the position of axial adjustment platform adjustment bushing pipe and cooling tube so that the optical fiber after coming out of the stove passes from bushing pipe is central axial;
(2) temperature measurer gathers position and the surface temperature of bushing pipe inner fiber in real time, and feeds back to controller, controller according to
The fiber surface temperature of temperature measurer feedback is passed through the flow of inert gas in bushing pipe to adjust so that optical fiber is passed from bushing pipe
Temperature reaches preset temperature;The fiber position that controller feeds back according to temperature measurer is adjusted with axial adjustment platform so that optical fiber is all the time
Central axial from bushing pipe passes.
The Full-automatic optical fibre drawing cooling system of the present invention, can automatically control and adjust cooling during high-speed wire-drawing
The position of pipe and inert gas charge flow rate, the dosage of inert gas, drop are saved while ensureing that optical fiber cooling effect is good
Low production cost, it is good airproof performance, easy to clean.
Beneficial effects of the present invention have:
One, the pipe structure for cooling compared to current two halves open-close type, cooling tube of the invention use integral closed pipe
Body structure, there is better seal effect, there is no the action of opening and closing, avoids the disconnected fine exception that the action is brought
Occur.
Secondly, cooling tube nested inside set inner wall smooth bushing pipe, cooling tube itself need not be cleaned periodically, and inwall
The cleaning of smooth polytetrafluoroethylene (PTFE) bushing pipe only needs to be cleaned from top to down in interior chamber with long hairbrush, does not have broken optical fiber etc.
Foreign matter is remained, and the optical fiber during lasting high-speed wire-drawing is caused to damage so as to avoid.
Thirdly, temperature measurer gather position and the surface temperature of bushing pipe inner fiber in real time, and feed back to controller, controller root
The position of bushing pipe and cooling tube is adjusted by adjusting with axial adjustment platform so that optical fiber is all the time from lining according to the current location of optical fiber
The central axial of pipe passes, and because of cooling tube position deviation optical fiber will not be caused to be scratched.
Four, controller is passed through the flow of inert gas according to the temperature of optical fiber to adjust, and on the one hand may insure optical fiber
Cooling effect is good, on the other hand can reduce the dosage of inert gas, saves production cost.
Brief description of the drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention.
Wherein:2- cooling tubes, 4- bushing pipes, 6- stomatas, 8- is the same as axial adjustment platform, 10- temperature measurers, 12- controllers, 14- liquid
Cold trap, 18- control panels.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
More fully understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment one
As shown in figure 1, present embodiment discloses a kind of Full-automatic optical fibre drawing cooling system, including cooling tube 2, cooling tube
2 preferably use the cylindric stainless steel body of integral structure, compared to the pipe structure for cooling of current two halves open-close type, the present invention
Cooling tube using the closed pipe structure of one, there is better seal effect.Bushing pipe 4, bushing pipe are provided with above-mentioned cooling tube 2
4 preferably use polytetrafluoroethylene (PTFE) bushing pipe, and polytetrafluoroethylene (PTFE) material high temperature resistant, product wall is smooth, easy to clean.
Above-mentioned bushing pipe 4 is nested in cooling tube 2, and cooling tube 2 docks with the plug for outlet of wire-drawer-tower, and optical fiber enters lining after coming out of the stove
In pipe 4, above-mentioned cooling tube 2 is provided with the stomata 6 being connected with bushing pipe 4, and indifferent gas is passed through into bushing pipe 4 by above-mentioned stomata 6
Body, forced cooling is carried out to the optical fiber in bushing pipe 4 by inert gas, and protect optical fiber not oxidized.The present embodiment technical side
In case, above-mentioned inert gas preferably uses helium, and above-mentioned stomata 6 is arranged on the middle part of the length bearing of trend of cooling tube 2
It is located at the end that optical fiber passes with cooling tube 2.Optical fiber passes bushing pipe 4 from top to bottom, is passed through in the bottom of bushing pipe 4 and middle part
Inert gas so that inert gas moves from bottom to top in bushing pipe 4, and the moving direction of optical fiber and inert gas inversely moves each other
It is dynamic so that inert gas is enclosed in around mobile optical fiber, carries out heat conduction to the optical fiber of high temperature, has more preferable cooling effect.
Helical coil is provided with liquid cold trap 14 from bottom to top between the inner and outer wall of above-mentioned cooling tube 2, and above-mentioned liquid is cold
Coolant is passed through in groove 14.Coolant is passed through in liquid cold trap 14, on the one hand cooling tube 2 is cooled in itself, it is on the other hand auxiliary
Help the cooling of the inner fiber of bushing pipe 4.The liquid cold trap 14 of helical coil can increase liquid huyashi-chuuka (cold chinese-style noodles) product, improve the cold effect of liquid.
Further, the both ends of above-mentioned liquid cold trap 14 are connected to cooling circulation water tank by water pipe, accomplish coolant
Recycle, it is cost-effective.
As a further improvement on the present invention, the both ends of above-mentioned cooling tube 2 are connected to together on axial adjustment platform 8,
Be equipped with temperature measurer 10 on two above-mentioned same axial adjustment platforms 8, above-mentioned temperature measurer 10 be used for the position for detecting die ontology fine hole inner fiber and
Surface temperature, above-mentioned temperature measurer 10 connect controller 12, and the control connection of controller noted above 12 is the same as axial adjustment platform 8, above-mentioned control
The temperature value adjustment that device 12 feeds back according to temperature measurer 10 is passed through the inert gas flow in bushing pipe 4.
Above-mentioned cooling system also includes control panel 18, and above-mentioned control panel 18 electrically connects controller, above-mentioned control panel
The current location of 18 display optical fiber and Current Temperatures, and receive the operation setting of user.
Same axial adjustment platform 8 and temperature measurer 10 in the present embodiment technical scheme are can directly to buy on the market
Equipment, temperature measurer 10 can gather temperature and the position of object simultaneously;With axial adjustment platform 8 can a plane (X-axis and
Y-axis) the whole position for being fixed thereon object of up-regulation, such as, for people in face of being stood with axial adjustment platform 8, left and right directions is X-axis side
To above-below direction is Y direction.In the present embodiment technical scheme, with axial adjustment, average 8 is controlled by controller 12, temperature measurer
The position of the 10 collection inner fibers of bushing pipe 4, and shown in control panel 18, if optical fiber is currently at the center of bushing pipe, no
Same axial adjustment platform 8 is made any adjustments, if the center of bushing pipe 4 is deviateed in the current position of optical fiber, controller is same by controlling
The adjustment position of axial adjustment platform 8 is to adjust the position of cooling tube 2 so that optical fiber passes from the central axial of bushing pipe 4 all the time.
At the same time, the temperature feedback on temperature measurer collection bushing pipe 4 inner fiber surface is to controller 12, and in control panel 18
Upper display, controller 12 adjust the flow that is passed through of inert gas according to the temperature of optical fiber surface, and the purpose of adjustment is:So that light
Fiber surface temperature meets that back segment coating requires when fibre passes from bushing pipe 4.The flow of inert gas is automatically controlled, on the one hand may be used
To ensure that optical fiber cooling effect is good, the dosage of inert gas on the other hand can be reduced, saves production cost.
In addition, the both ends of cooling tube 2 are connected to two with axial adjustment platform 8, two only respectively with axial adjustment platform 8
The position at vertical adjustment cooling tube 2 both ends, though the original state of cooling tube 2 not at the center of bushing pipe 4, equally can be definitely right
The position of middle adjustment cooling tube 2.
Embodiment two
Present embodiment discloses a kind of drawing optical fibers cooling means, comprise the following steps,
(1) bushing pipe 4 is taken to be nested in cooling tube 2, the both ends of bushing pipe 4 and cooling tube 2 are respectively arranged on together axial adjustment
On platform 8, the position of bushing pipe 4 and cooling tube 2 is adjusted with axial adjustment platform 8 so that
Optical fiber after coming out of the stove passes from bushing pipe 4 is central axial;
(2) temperature measurer 10 gathers position and the surface temperature of bushing pipe inner fiber in real time, and feeds back to controller 12, controller
12 fiber surface temperatures fed back according to temperature measurer 10 are passed through the flow of inert gas in bushing pipe to adjust so that from bushing pipe 4
The temperature for passing optical fiber reaches back segment coating requirement;The fiber position that controller 12 feeds back according to temperature measurer 10 adjusts same axial adjustment
Platform 8 so that optical fiber passes from the central axial of bushing pipe 4 all the time.
The Full-automatic optical fibre drawing cooling system of the present invention, can automatically control and adjust cooling during high-speed wire-drawing
The position of pipe and inert gas charge flow rate, the dosage of inert gas, drop are saved while ensureing that optical fiber cooling effect is good
Low production cost, it is good airproof performance, easy to clean.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
Enclose not limited to this.The equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (10)
1. a kind of Full-automatic optical fibre drawing cooling system, including cooling tube, it is characterised in that:Bushing pipe is provided with the cooling tube,
The cooling tube is provided with the stomata being connected with bushing pipe, and inert gas is passed through into bushing pipe by the stomata;The cooling
The both ends of pipe are connected to together on axial adjustment platform, and temperature measurer, the thermometric are equipped with the two same axial adjustment platforms
Instrument is used for position and the surface temperature for detecting die ontology fine hole inner fiber, and the temperature measurer connects controller, and the controller control connects
Same axial adjustment platform is connect, the temperature value adjustment that the controller feeds back according to temperature measurer is passed through the inert gas flow in bushing pipe.
2. Full-automatic optical fibre drawing cooling system as claimed in claim 1, it is characterised in that:The bushing pipe is polytetrafluoroethylene (PTFE)
Bushing pipe.
3. Full-automatic optical fibre drawing cooling system as claimed in claim 1, it is characterised in that:The stomata is arranged on cooling tube
The middle part of length bearing of trend and cooling tube are located at the end that optical fiber passes.
4. Full-automatic optical fibre drawing cooling system as claimed in claim 3, it is characterised in that:The inert gas is helium.
5. Full-automatic optical fibre drawing cooling system as claimed in claim 1, it is characterised in that:The inwall of the cooling tube and outer
Helical coil is provided with liquid cold trap from bottom to top between wall, and coolant is passed through in the liquid cold trap.
6. Full-automatic optical fibre drawing cooling system as claimed in claim 5, it is characterised in that:The both ends of the liquid cold trap are logical
Cross water pipe and be connected to cooling circulation water tank.
7. Full-automatic optical fibre drawing cooling system as claimed in claim 5, it is characterised in that:The cooling tube is integral type knot
The cylindric body of structure.
8. Full-automatic optical fibre drawing cooling system as claimed in claim 7, it is characterised in that:The cooling tube is stainless steel
Pipe.
9. Full-automatic optical fibre drawing cooling system as claimed in claim 1, it is characterised in that:It also includes control panel, institute
Control panel electrical connection controller is stated, the control panel shows current location and the Current Temperatures of optical fiber, and receives user's
Operation setting.
A kind of 10. drawing optical fibers cooling means, it is characterised in that:Usage right requires the cooling system described in any one of 1-9, its
Comprise the following steps,
(1) bushing pipe is taken to be nested in cooling tube, the both ends of bushing pipe and cooling tube are respectively arranged on together on axial adjustment platform, together
Axial adjustment platform adjusts the position of bushing pipe and cooling tube so that the optical fiber after coming out of the stove passes from bushing pipe is central axial;
(2) temperature measurer gathers position and the surface temperature of bushing pipe inner fiber in real time, and feeds back to controller, and controller is according to thermometric
The fiber surface temperature of instrument feedback is passed through the flow of inert gas in bushing pipe to adjust so that the temperature of optical fiber is passed from bushing pipe
Reach preset temperature;The fiber position that controller feeds back according to temperature measurer is adjusted with axial adjustment platform so that optical fiber is all the time from lining
The central axial of pipe passes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201711105071.8A CN107759072A (en) | 2017-11-10 | 2017-11-10 | Full-automatic optical fibre drawing cooling system and cooling means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201711105071.8A CN107759072A (en) | 2017-11-10 | 2017-11-10 | Full-automatic optical fibre drawing cooling system and cooling means |
Publications (1)
Publication Number | Publication Date |
---|---|
CN107759072A true CN107759072A (en) | 2018-03-06 |
Family
ID=61273413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201711105071.8A Pending CN107759072A (en) | 2017-11-10 | 2017-11-10 | Full-automatic optical fibre drawing cooling system and cooling means |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107759072A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109608057A (en) * | 2018-12-25 | 2019-04-12 | 通鼎互联信息股份有限公司 | A kind of optical fiber cooling apparatus |
CN110723901A (en) * | 2019-09-29 | 2020-01-24 | 法尔胜泓昇集团有限公司 | Automatic centering and cleaning device for lining pipe of optical fiber annealing furnace and implementation method thereof |
CN111908785A (en) * | 2020-07-14 | 2020-11-10 | 湖北凯乐量子通信光电科技有限公司 | Ultralow-temperature helium-free cooling system for high-speed fiber drawing production |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11130458A (en) * | 1997-10-27 | 1999-05-18 | Sumitomo Electric Ind Ltd | Optical fiber cooler and production of optical fiber, using the same |
CN102976609A (en) * | 2012-11-19 | 2013-03-20 | 中天科技光纤有限公司 | Flow automatic control device of cooling helium for wire-drawing cooling pipe |
CN107056043A (en) * | 2017-05-09 | 2017-08-18 | 江苏亨通光纤科技有限公司 | A kind of optical fibre cooling tube with automatic centering, cleaning function |
CN207483612U (en) * | 2017-11-10 | 2018-06-12 | 江苏南方光纤科技有限公司 | Full-automatic optical fibre drawing cooling system |
-
2017
- 2017-11-10 CN CN201711105071.8A patent/CN107759072A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11130458A (en) * | 1997-10-27 | 1999-05-18 | Sumitomo Electric Ind Ltd | Optical fiber cooler and production of optical fiber, using the same |
CN102976609A (en) * | 2012-11-19 | 2013-03-20 | 中天科技光纤有限公司 | Flow automatic control device of cooling helium for wire-drawing cooling pipe |
CN107056043A (en) * | 2017-05-09 | 2017-08-18 | 江苏亨通光纤科技有限公司 | A kind of optical fibre cooling tube with automatic centering, cleaning function |
CN207483612U (en) * | 2017-11-10 | 2018-06-12 | 江苏南方光纤科技有限公司 | Full-automatic optical fibre drawing cooling system |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109608057A (en) * | 2018-12-25 | 2019-04-12 | 通鼎互联信息股份有限公司 | A kind of optical fiber cooling apparatus |
CN109608057B (en) * | 2018-12-25 | 2023-11-03 | 通鼎互联信息股份有限公司 | Optical fiber cooling device |
CN110723901A (en) * | 2019-09-29 | 2020-01-24 | 法尔胜泓昇集团有限公司 | Automatic centering and cleaning device for lining pipe of optical fiber annealing furnace and implementation method thereof |
CN111908785A (en) * | 2020-07-14 | 2020-11-10 | 湖北凯乐量子通信光电科技有限公司 | Ultralow-temperature helium-free cooling system for high-speed fiber drawing production |
CN111908785B (en) * | 2020-07-14 | 2022-07-05 | 湖北凯乐量子通信光电科技有限公司 | Ultralow-temperature helium-free cooling system for high-speed fiber drawing production |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN207483612U (en) | Full-automatic optical fibre drawing cooling system | |
CN107759072A (en) | Full-automatic optical fibre drawing cooling system and cooling means | |
CN106048204A (en) | High speed multi-head annealing machine | |
CN108891003A (en) | A kind of cable insulation extrusion device of rapid cooling | |
CN111116013B (en) | Molding and cooling device and method for fluorophosphate optical glass | |
CN107056043A (en) | A kind of optical fibre cooling tube with automatic centering, cleaning function | |
CN205927076U (en) | Plumbous busbar casting device of battery | |
CN106542730A (en) | A kind of chiller | |
CN108907206A (en) | A kind of hydrogen broken furnace | |
CN203846080U (en) | Multiend wire-drawing continuous annealing device for copper conductor | |
CN208776816U (en) | A kind of quick water-cooling apparatus and wire rod hot tinning production equipment | |
CN208562157U (en) | Drawing optical fibers annealing device | |
CN107588664B (en) | Cable sintering furnace | |
CN207695804U (en) | A kind of vacuum welding furnace control system | |
CN203343412U (en) | Vacuum pressurization casting machine for false teeth | |
CN207435503U (en) | It is a kind of to be used for Chain Link axis, the heating unit of axle sleeve | |
CN102719652A (en) | Device and solution for water-quenching heat treatment on sorbitizing heat treatment production line of multi-specification steel wires | |
CN110749086B (en) | Spraying type circulating heater | |
CN203683628U (en) | Molten salt heat exchange temperature control device for reaction furnace body | |
CN209632363U (en) | A kind of online gas shield device of welded tube welding seam | |
CN208517470U (en) | A kind of steel wire lead bath circulating cooling system | |
CN205133748U (en) | Drying device after copper facing of CO2 gas guarantor welding wire | |
CN205342145U (en) | A integral type heating device for vacuum welding equipment | |
CN206586284U (en) | A kind of vacreation device | |
CN207103776U (en) | A kind of crystallizer for up-drawing method production copper |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |