CN206502848U - Copper wire disk temperature insulation annealing furnace - Google Patents
Copper wire disk temperature insulation annealing furnace Download PDFInfo
- Publication number
- CN206502848U CN206502848U CN201621442328.XU CN201621442328U CN206502848U CN 206502848 U CN206502848 U CN 206502848U CN 201621442328 U CN201621442328 U CN 201621442328U CN 206502848 U CN206502848 U CN 206502848U
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- drying oven
- vacuum drying
- inner barrel
- cylinder body
- outer cylinder
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Abstract
The utility model discloses a kind of copper wire disk temperature insulation annealing furnace, including：Frame, the upper end of the frame is provided with vacuum drying oven outer cylinder body, vacuum drying oven inner barrel is provided with the vacuum drying oven outer cylinder body, the neck of the vacuum drying oven inner barrel stretches out vacuum drying oven outer cylinder body and is connected with fire door flange, some first locks are evenly arranged with the fire door flange, heat-preservation cotton is filled between the vacuum drying oven outer cylinder body and vacuum drying oven inner barrel, the interior lower end of the vacuum drying oven inner barrel is provided with up train track, the front end of the vacuum drying oven outer cylinder body is provided with moving cart, the lower end of moving cart is evenly arranged with axletree on some on described, the upper wheel cooperated with up train track is provided with axletree on described, the rear end of the upper moving cart is stretched into be arranged on up train track in vacuum drying oven inner barrel by upper wheel rolling.
Description
Technical field
The utility model is related to a kind of annealing device, more particularly to a kind of copper wire disk temperature insulation annealing furnace.
Background technology
Copper wire is the important source material for wire ＆ cable factory, and copper wire can be coiled after stretching is made the copper wire of different-diameter
Into copper wire disk, and internal stress can be formed in copper wire during stretching, at this moment be accomplished by entering the copper wire disk for making shaping
Row annealing.Wherein annealing is to refer to copper wire disk being heated slowly to certain temperature, enough time is kept, then with suitable
Speed is cooled down, it is therefore an objective to reduce hardness, eliminates residual stress, and stable dimensions reduce deformation and crackle tendency, and crystal grain thinning is adjusted
Whole group is knitted, and is eliminated tissue defects, is reached good plasticity.Current 0.2mm~1mm copper wires disk is all using at well formula annealing
Reason, exactly digs a bite well in below ground and places heating furnace for Heated Copper wire tray, the copper wire after being heated in pit furnace
Disk needs constant temperature to keep time enough, and well type structured heating furnace is easily caused in heating furnace due to poor sealing performance
Difference variation amplitude is larger, typically at ± 3 DEG C, and temperature control is inaccurate, is easily caused a variety of quality of copper wire disk later stage appearance and asks
Topic, while existing pit furnace can only carry out copper wire disk single heating, needs to lead to after the completion of the heating of copper wire disk
Cross boom hoisting and hang out copper wire disk out of heating furnace and be put into pond and cooled, the purpose of annealing is reached, during lifting
The copper wire disk of high temperature can have certain potential safety hazard to the staff of surrounding, and lift inconvenient operation in well, take
When it is laborious, due to being afraid of that superposition produces pressure when copper wire disk is put into pit furnace heating in addition, can only heat every time seldom several
Copper wire disk, inefficiency.
Utility model content
Technical problem to be solved in the utility model is：There is provided a kind of annealing effect good copper wire disk temperature insulation annealing furnace.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：Copper wire disk temperature insulation annealing furnace, bag
Include：Frame, vacuum drying oven outer cylinder body is provided with the upper end of the frame, is provided with the vacuum drying oven outer cylinder body in vacuum drying oven
Cylinder, the neck of the vacuum drying oven inner barrel stretches out vacuum drying oven outer cylinder body and is connected with fire door flange, on the fire door flange
Some first locks are evenly arranged with, heat-preservation cotton are filled between the vacuum drying oven outer cylinder body and vacuum drying oven inner barrel, in institute
The interior lower end for stating vacuum drying oven inner barrel is provided with up train track, is provided with and moves in the front end of the vacuum drying oven outer cylinder body
Dolly, the lower end of moving cart is evenly arranged with axletree on some on described, be provided with described on axletree with it is upper
The upper wheel that Crane Rail cooperates, the rear end of the upper moving cart is stretched into vacuum drying oven inner barrel by upper wheel rolling
It is arranged on up train track, the front end of the upper moving cart is connected with bell, is provided with the bell and fire door
The bell flange that flange cooperates, is provided with the second lock cooperated with the first lock, institute on the bell flange
State bell flange by connecting seat with lower moving cart to be connected, under being provided with the frame of the vacuum drying oven outer cylinder body lower end
Crane Rail, is rotated by bearing block and is provided with lower axletree, under described respectively in the lower end both sides of the lower moving cart
The two ends of axletree are respectively arranged with the lower wheel cooperated with down train track, are provided with wherein on a lower axletree
Driven sprocket, in the company
Cycloidal planetary gear speed reducer is provided with joint chair, drive chain is provided with the motor shaft of the cycloidal planetary gear speed reducer
Wheel, the driven sprocket is connected with drive sprocket by chain, is provided with the ground of the vacuum drying oven outer cylinder body left end
Nitrogen-making device and vavuum pump, the nitrogen pipeline processed of the nitrogen-making device are stretched into inside the front end of vacuum drying oven inner barrel, the vavuum pump
Vacuum lead stretch into inside the rear end of vacuum drying oven inner barrel, be additionally provided with electric heating tube in the vacuum drying oven inner barrel,
The electrode contact of the electric heating tube stretches out vacuum drying oven inner barrel and vacuum drying oven outer barrel is external, the one of the vacuum drying oven outer cylinder body
Side is evenly arranged with some winding pipes being interconnected with vacuum drying oven inner barrel, and the winding pipe is connected with air inlet main pipe
Connect, some air-out branch pipes being interconnected with vacuum drying oven inner barrel be evenly arranged with the opposite side of the vacuum drying oven outer cylinder body,
The air-out branch pipe is connected with air-out supervisor, and the air-out supervisor is connected by exhaust column with cooling blower, the cooling
Blower fan is connected by the first connecting tube with heat exchanger, and the side of the heat exchanger is provided with water inlet, in the heat exchanger
Opposite side be provided with delivery port, the heat exchanger is connected by the second connecting tube with air inlet main pipe.
In order to preferably solve above-mentioned technical problem, the further technical scheme that the utility model is used is：Described true
Inner bag is provided with by support base in empty stove inner barrel, the front end of the inner bag passes through sealing flange and the neck of vacuum drying oven inner barrel
Portion is connected, and the up train track is arranged on the interior lower end of inner bag, and the nitrogen pipeline processed is stretched into inside the front end of inner bag, institute
State vacuum lead to stretch into inside the rear end of inner bag, cavity, the electricity are provided between the inner bag and vacuum drying oven inner barrel
Heating tube is arranged in cavity, and the winding pipe and air-out branch pipe are interconnected with cavity respectively.
The utility model has the advantages that：Above-mentioned copper wire disk temperature insulation annealing furnace, equipment is all arranged on ground and replaced originally
Well type structured, good sealing effect can make the thermostatic control that copper wire disk is kept after being heated in annealing furnace within ± 1 DEG C, temperature
Degree control is accurate, while collecting heating in vacuum and cooling integration processing, firing rate is than well type structured fast 2~3 times, cooling rate
Than well type structured fast 1 times, and it need not be lifted into pond and cooled down again, easy to operate, annealing effect is good, uses peace
Entirely, the high temperature hidden danger in hoisting process is eliminated, the multiple copper wire disks of single treatment additionally is able to, the pressure of superposition, work will not be produced
Greatly improved as efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model copper wire disk temperature insulation annealing furnace.
Fig. 2 is Fig. 1 overlooking the structure diagram.
Fig. 3 is Fig. 1 right side structural representation.
In figure：1st, frame, 2, vacuum drying oven outer cylinder body, 3, vacuum drying oven inner barrel, 4, neck, 5, fire door flange, the 6, first lock
Button, 7, heat-preservation cotton, 8, up train track, 9, upper moving cart, 10, upper axletree, 11, upper wheel, 12, bell, 13, bell method
Orchid, the 14, second lock, 15, connecting seat, 16, lower moving cart, 17, down train track, 18, bearing block, 19, lower axletree,
20th, lower wheel, 21, driven sprocket, 22, cycloidal planetary gear speed reducer, 23, motor shaft, 24, drive sprocket, 25, chain, 26, nitrogen processed
Device, 261, nitrogen pipeline processed, 27, vavuum pump, 271, vacuum lead, 28, electric heating tube, 29, electrode contact, 30, air intake branch
Pipe, 31, air inlet main pipe, 32, air-out branch pipe, 33, air-out supervisor, 34, exhaust column, 35, cooling blower, the 36, first connecting tube,
37th, heat exchanger, 371, water inlet
Mouthful, 372, delivery port, the 38, second connecting tube, 39, support base, 40, inner bag, 41, sealing flange, 42, cavity.
Embodiment
Particular content of the present utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 3 shows, copper wire disk temperature insulation annealing furnace, including：Frame 1, is provided with the upper end of the frame 1
Vacuum drying oven outer cylinder body 2, is provided with vacuum drying oven inner barrel 3, the neck of the vacuum drying oven inner barrel 3 in the vacuum drying oven outer cylinder body 2
Portion 4 stretches out vacuum drying oven outer cylinder body 2 and is connected with fire door flange 5, and some first locks are evenly arranged with the fire door flange 5
6, heat-preservation cotton 7 is filled between the vacuum drying oven outer cylinder body 2 and vacuum drying oven inner barrel 3, in the vacuum drying oven inner barrel 1
Subordinate end is provided with up train track 8, and the front end of the vacuum drying oven outer cylinder body 2 is provided with moving cart 9, moved up described
The lower end of dynamic dolly 9 is evenly arranged with some upper axletrees 10, is provided with and the phase of up train track 8 on axletree 10 on described
The upper wheel 11 mutually coordinated, the rear end of the upper moving cart 9 is stretched into roll by upper wheel 11 in vacuum drying oven inner barrel 3 and set
On up train track 8, the front end of the upper moving cart 9 is connected with bell 12, is provided with and stove on the bell 12
The bell flange 13 that mouth flange 5 cooperates, is provided with second cooperated with the first lock 6 on the bell flange 13
Lock 14, the bell flange 13 is connected by connecting seat 15 with lower moving cart 16, in the lower end of vacuum drying oven outer cylinder body 2
Frame 1 on be provided with down train track 17, rotated respectively by bearing block 18 in the lower end both sides of the lower moving cart 16
Lower axletree 19 is provided with, is respectively arranged with the two ends of the lower axletree 19 and getting off that down train track 17 cooperates
Wheel 20, is provided with driven sprocket 21, being provided with cycloidal-pin wheel on the connecting seat 15 subtracts on a lower axletree 19 wherein
Fast machine 22, is provided with drive sprocket 24 on the motor shaft 23 of the cycloidal planetary gear speed reducer 22, and the driven sprocket 21 passes through
Chain 25 is connected with drive sprocket 24, nitrogen-making device 26 is provided with the ground of the left end of vacuum drying oven outer cylinder body 2 and true
Empty pump 27, the nitrogen pipeline 261 processed of the nitrogen-making device 26 is stretched into inside the front end of vacuum drying oven inner barrel 3, the vavuum pump 27
Vacuum lead 271 is stretched into inside the rear end of vacuum drying oven inner barrel 3, and electrical heating is additionally provided with the vacuum drying oven inner barrel 3
Pipe 28, the electrode contact 29 of the electric heating tube 28 is stretched out outside vacuum drying oven inner barrel 3 and vacuum drying oven outer cylinder body 2, in the vacuum
The side of stove outer cylinder body 2 is evenly arranged with some winding pipes 30 being interconnected with vacuum drying oven inner barrel 3, the winding pipe
30 are connected with air inlet main pipe 31, and some and vacuum drying oven inner barrel 3 is evenly arranged with the opposite side of the vacuum drying oven outer cylinder body 2
Interconnected air-out branch pipe 32, the air-out branch pipe 32 is connected with air-out supervisor 33, and the air-out supervisor 33 passes through exhausting
Pipe 34 is connected with cooling blower 35, and the cooling blower 35 is connected by the first connecting tube 36 with heat exchanger 37, described
The side of heat exchanger 37 is provided with water inlet 371, and the opposite side of the heat exchanger 37 is provided with delivery port 372, the heat exchange
Device 37 is connected by the second connecting tube 38 with air inlet main pipe 32.
As shown in Figure 1, Figure 2, Figure 3 shows, in this example, it is provided with the vacuum drying oven inner barrel 3 by support base 39
Inner bag 40, the front end of the inner bag 40 is connected by sealing flange 41 with the neck 4 of vacuum drying oven inner barrel 3, the up train
Track 8 is arranged on the interior lower end of inner bag 40, and the nitrogen pipeline 261 processed is stretched into inside the front end of inner bag 40, the vacuum-pumping tube
Road 271 is stretched into inside the rear end of inner bag 40, and cavity 42, the electricity are provided between the inner bag 40 and vacuum drying oven inner barrel 3
Heating tube 28 is arranged in cavity 42, and the winding pipe 30 and air-out branch pipe 32 are interconnected with cavity 42 respectively.
Above-mentioned copper wire disk temperature insulation annealing furnace is put in use, being lifted multiple copper wire disks in supreme moving cart 9 by crane
Put well, start cycloidal planetary gear speed reducer 22, the motor shaft 23 of cycloidal planetary gear speed reducer 22 drives drive sprocket 24 to rotate, drive chain
Wheel 24 drives driven sprocket 21 to rotate by chain 25, and driven sprocket 21 drives lower axletree 19 to be rotated in bearing block 18, under
Axletree 19 drives lower wheel 20 to be moved to the left on down train track 17, so that drive lower moving cart 16 to be moved to the left, under
Moving cart 16 is by connecting seat 15 to left movement, and connecting seat 15 drives bell flange 13 to left movement, and bell flange 13 drives
Bell 12 is to left movement, and bell 12 drives upper moving cart 9 to be moved to the left by upper wheel 11 on up train track 8, so that
Copper wire disk is sent in inner bag 40, when bell 12 is inserted into neck 4, bell flange 13 offsets with fire door flange 5, now
Cycloidal planetary gear speed reducer 22 is stopped, and the second lock 14 on bell flange 13 is locked with the first lock 6 on fire door flange 5
Tightly, vavuum pump 27 and nitrogen-making device 26 are started, vavuum pump 27 is extracted out the air in inner bag 40 by vacuum lead 271, with
This simultaneously, nitrogen-making device 26 sends into nitrogen in inner bag 40 by nitrogen pipeline 261 processed, operation 15~30 minutes after the He of vavuum pump 27
Nitrogen-making device 26 is stopped, by being heated with control device coordination electrode joint 29 to the power supply of electric heating tube 28, when interior
Temperature in courage rises to 580 DEG C, continues constant temperature after 2~3 hours, electric heating tube 28 is stopped, and starts cooling blower 35, cooling
Blower fan 35 is evacuated by exhaust tube 34, and now the hot gas in cavity 42 sequentially passes through 32 → air-out of air-out branch pipe, 31 → pumping of supervisor
Pipe 34 is reached to be cooled down in cooling blower 35, and the gas after supercooling sequentially passes through the first connecting tube 36 feeding heat exchanger 37
Interior second of cooling of progress, the gas after second of cooling sequentially passes through second connecting tube 38 → air inlet main pipe, 31 → winding pipe
30 are back in cavity 42 inner bag 40 are cooled again, and heat exchanger can be changed by water inlet 371 and delivery port 372
Water cools to the gas of process, reaches more preferable cooling-down effect, after continuing the cooling of 7~8 hours, the temperature in body of heater
Degree is down to normal temperature, unclamps the first lock 6 and the second lock 14, starts cycloidal planetary gear speed reducer 22, cycloidal planetary gear speed reducer 22
Motor shaft 23 is inverted, and the motor shaft 23 of cycloidal planetary gear speed reducer 22 drives drive sprocket 24 to invert, and drive sprocket 24 passes through chain
25 drive driven sprockets 21 are inverted, and driven sprocket 21 drives lower axletree 19 to be inverted in bearing block 18, and lower axletree 19 drives
Lower wheel 20 is moved right on down train track 17, so as to drive lower moving cart 16 to move right, lower moving cart 16 is led to
Cross connecting seat 15 to move right, connecting seat 15 drives bell flange 13 to move right, bell flange 13 drives bell 12 to transport to the right
Dynamic, bell 12 drives upper moving cart 9 to be moved right by upper wheel 11 on up train track 8 to maximum, so that by copper
Wire tray is pulled out out of inner bag 40, and the copper wire disk that annealing is completed is hung out by crane, carries out the annealing of next round copper wire disk.
Above-mentioned copper wire disk temperature insulation annealing furnace, equipment is all arranged on ground and replaces original well type structured, good sealing effect,
The thermostatic control that copper wire disk is kept after being heated in annealing furnace can be made within ± 1 DEG C, temperature control is accurate, while collecting vacuum
Heating and cooling integration processing, firing rate than well type structured fast 2~3 times, cooling rate than well type structured fast 1 times, and
It need not be lifted into pond and be cooled down again, easy to operate, annealing effect is good, using safety, eliminate the height in hoisting process
Warm hidden danger, additionally is able to the multiple copper wire disks of single treatment, will not produce the pressure of superposition, operating efficiency is greatly improved.
Claims (2)
1. copper wire disk temperature insulation annealing furnace, it is characterised in that：Including：Frame（1）, in the frame（1）Upper end be provided with vacuum
Stove outer cylinder body（2）, in the vacuum drying oven outer cylinder body（2）Inside it is provided with vacuum drying oven inner barrel（3）, the vacuum drying oven inner barrel（3）
Neck（4）Stretch out vacuum drying oven outer cylinder body（2）With fire door flange（5）It is connected, in the fire door flange（5）On be evenly arranged with
Some first locks（6）, in the vacuum drying oven outer cylinder body（2）With vacuum drying oven inner barrel（3）Between be filled with heat-preservation cotton（7）,
The vacuum drying oven inner barrel（3）Interior lower end be provided with up train track（8）, in the vacuum drying oven outer cylinder body（2）Front end
It is provided with moving cart（9）, the moving cart on described（9）Lower end be evenly arranged with some upper axletrees（10）, institute
State axletree（10）On be provided with and up train track（8）The upper wheel cooperated（11）, the upper moving cart（9）'s
Vacuum drying oven inner barrel is stretched into rear end（3）It is interior to pass through upper wheel（11）Rolling is arranged on up train track（8）On, the upper movement is small
Car（9）Front end and bell（12）It is connected, in the bell（12）On be provided with and fire door flange（5）The bell of mutual cooperation
Flange（13）, in the bell flange（13）On be provided with and first lock（6）The second lock cooperated（14）, the stove
Lid flange（13）Pass through connecting seat（15）With lower moving cart（16）It is connected, in the vacuum drying oven outer cylinder body（2）The machine of lower end
Frame（1）On be provided with down train track（17）, in the lower moving cart（16）Lower end both sides pass through bearing block respectively（18）
Rotation is provided with lower axletree（19）, in the lower axletree（19）Two ends be respectively arranged with and down train track（17）Mutually
The lower wheel coordinated（20）, a lower axletree wherein（19）On be provided with driven sprocket（21）, in the connecting seat（15）
On be provided with cycloidal planetary gear speed reducer（22）, in the cycloidal planetary gear speed reducer（22）Motor shaft（23）On be provided with drive chain
Wheel（24）, the driven sprocket（21）Pass through chain（25）With drive sprocket（24）It is connected, in the vacuum drying oven outer cylinder body（2）
Nitrogen-making device is provided with the ground of left end（26）And vavuum pump（27）, the nitrogen-making device（26）Nitrogen pipeline processed（261）Stretch
Enter vacuum drying oven inner barrel（3）Front end inside, the vavuum pump（27）Vacuum lead（271）Stretch into vacuum drying oven inner barrel
（3）Rear end inside, in the vacuum drying oven inner barrel（3）Inside it is additionally provided with electric heating tube（28）, the electric heating tube（28）'s
Electrode contact（29）Stretch out vacuum drying oven inner barrel（3）With vacuum drying oven outer cylinder body（2）Outside, in the vacuum drying oven outer cylinder body（2）One
Side is evenly arranged with some and vacuum drying oven inner barrel（3）Interconnected winding pipe（30）, the winding pipe（30）With entering
Wind is responsible for（31）It is connected, in the vacuum drying oven outer cylinder body（2）Opposite side be evenly arranged with it is some with vacuum drying oven inner barrel（3）
Interconnected air-out branch pipe（32）, the air-out branch pipe（32）It is responsible for air-out（33）It is connected, the air-out supervisor（33）
Pass through exhaust column（34）With cooling blower（35）It is connected, the cooling blower（35）Pass through the first connecting tube（36）With heat exchanger
（37）It is connected, in the heat exchanger（37）Side be provided with water inlet（371）, in the heat exchanger（37）Opposite side set
It is equipped with delivery port（372）, the heat exchanger（37）Pass through the second connecting tube（38）With air inlet main pipe（31）It is connected.
2. according to the copper wire disk temperature insulation annealing furnace described in claim 1, it is characterised in that：In the vacuum drying oven inner barrel（3）It is interior
Pass through support base（39）It is provided with inner bag（40）, the inner bag（40）Front end pass through sealing flange（41）With vacuum drying oven inner barrel
（3）Neck（4）It is connected, the up train track（8）It is arranged on inner bag（40）Interior lower end, the nitrogen pipeline processed
（261）Stretch into inner bag（40）Front end inside, the vacuum lead（271）Stretch into inner bag（40）Rear end inside, described
Inner bag（40）With vacuum drying oven inner barrel（3）Between be provided with cavity（42）, the electric heating tube（28）It is arranged on cavity（42）It is interior,
The winding pipe（30）With air-out branch pipe（32）Respectively with cavity（42）It is interconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621442328.XU CN206502848U (en) | 2016-12-27 | 2016-12-27 | Copper wire disk temperature insulation annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621442328.XU CN206502848U (en) | 2016-12-27 | 2016-12-27 | Copper wire disk temperature insulation annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206502848U true CN206502848U (en) | 2017-09-19 |
Family
ID=59839484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621442328.XU Withdrawn - After Issue CN206502848U (en) | 2016-12-27 | 2016-12-27 | Copper wire disk temperature insulation annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206502848U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521135A (en) * | 2016-12-27 | 2017-03-22 | 江苏苏丰机械科技有限公司 | Copper wire disc heat preservation annealing furnace |
| CN109631575A (en) * | 2018-12-17 | 2019-04-16 | 宁波晋科自动化设备有限公司 | A kind of horizontal two Room sintering furnace of outer heat |
| CN110093575A (en) * | 2019-04-19 | 2019-08-06 | 南安市傅泉机械科技有限公司 | A kind of anti-sparking of cable copper core silk refinement crystal grain disappears the annealing device of resistance |
-
2016
- 2016-12-27 CN CN201621442328.XU patent/CN206502848U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521135A (en) * | 2016-12-27 | 2017-03-22 | 江苏苏丰机械科技有限公司 | Copper wire disc heat preservation annealing furnace |
| CN106521135B (en) * | 2016-12-27 | 2018-09-11 | 江苏苏丰机械科技有限公司 | Copper wire disk temperature insulation annealing furnace |
| CN109631575A (en) * | 2018-12-17 | 2019-04-16 | 宁波晋科自动化设备有限公司 | A kind of horizontal two Room sintering furnace of outer heat |
| CN110093575A (en) * | 2019-04-19 | 2019-08-06 | 南安市傅泉机械科技有限公司 | A kind of anti-sparking of cable copper core silk refinement crystal grain disappears the annealing device of resistance |
| CN110093575B (en) * | 2019-04-19 | 2021-03-12 | 常州易藤电气有限公司 | Annealing device for preventing sparking and eliminating resistance of copper core wire refined crystal grains for cables |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170919 Effective date of abandoning: 20180911 |
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| AV01 | Patent right actively abandoned |