CN110118901A - Different angle conducting wire overcurrent fault imitative experimental appliance - Google Patents
Different angle conducting wire overcurrent fault imitative experimental appliance Download PDFInfo
- Publication number
- CN110118901A CN110118901A CN201910266680.4A CN201910266680A CN110118901A CN 110118901 A CN110118901 A CN 110118901A CN 201910266680 A CN201910266680 A CN 201910266680A CN 110118901 A CN110118901 A CN 110118901A
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- China
- Prior art keywords
- sliding block
- conducting wire
- sliding rail
- different angle
- overcurrent fault
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- 238000012360 testing method Methods 0.000 claims abstract description 18
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000011835 investigation Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to a kind of different angle conducting wire overcurrent fault imitative experimental appliance is led, melting trace when existing breakdown of conducting wires experimental rig can not accurately determine conducting wire overcurrent fault is solved the problems, such as.The device includes support frame, the first sliding rail, the first sliding block and adjusts component；First sliding rail is installed on the support frame, and the first sliding block is arranged on the first sliding rail, can be slided on the first sliding rail；Adjusting component includes regulator bracket, tensioning spring, pulling force inductor, the second sliding rail, the second sliding block and spring fixator；Regulator bracket is fixedly installed on the support frame, spring fixator is hinged with regulator bracket, one end of tensioning spring is connect with spring fixator, the other end is connect by pulling force inductor with the second sliding block, second sliding rail is fixed on spring fixator, second sliding block is arranged on the second sliding rail, can slide on the second sliding rail；Test lead one end is fixed on the second sliding block, and the other end is fixed on the first sliding block.
Description
Technical field
The present invention relates to breakdown of conducting wires simulators, and in particular to a kind of different angle conducting wire overcurrent fault simulated experiment
Device.
Background technique
The common failure for causing electrical fire has short circuit, overcurrent, poor contact, electric leakage etc., compared to other failures, mistake
Current failure risk is larger.Babrauskas is studies have shown that overcurrent fault fire risk with higher, three in circuit
Times or more the overcurrent that caused of load current value can ignition leads insulating layer, meanwhile, according to Joule heat law Δ T=J2ρet/ρ
(wherein, J is current density, ρ to c in formulaeFor the resistivity of material, c is specific heat capacity, and t is conduction time, and ρ is the density of melt)
It is found that core temperature and electric current is square directly proportional, when overcurrent fault occurs for conducting wire, core temperature is increased rapidly, conducting wire
The diabatic processes such as heat transfer, heat radiation occur with insulating layer, causes core insulating layer melting drippage, is generated when conducting wire disconnects
Breaking electric arc can ignite insulating layer, cause electrical fire.
In conclusion research conducting wire overcurrent fault, improves the science and accuracy of electrical fire investigation, to electrical fire
Calamity investigation has great importance.But simulation overcurrent fault experimental bench suffers from the drawback that both at home and abroad at present
One, conducting wire level can only be laid on experimental bench in experimentation, can not conducting wire is vertical or tilt profiles,
Can only overcurrent fault under dummy level state, however, arrangement of conductors has horizontal, vertical, different angle distribution in life.Conducting wire
Different inclination angles causes melting insulating layer that can generate different flowings, after insulating layer is by arc ignition, combustion characteristics difference,
There is also difference for the melting trace for causing burning to be formed；Simultaneously as stack effect, air along have the space of vertical bank to
The phenomenon that rising or falling, air is caused to reinforce convection current is more obvious than horizontal space.Therefore, the different angle distribution of conducting wire is to leading
Line insulation burning generates strong influence, and conductor overheating process will affect conducting wire and melt trace, and the melting trace at point of origin is
Assert the key of which kind of electric fault；
Two, conducting wire both ends there are arc sag and are arched upward in experimentation, and when conducting wire overcurrent, core mechanical performance is reduced,
Since conducting wire itself is affected by gravity, conducting wire meeting falls downward, conducting wire both ends junction will receive the movement of pulling force guiding line center,
Conducting wire is displaced during the test, and conducting wire is made to form arc sag.Experiment uses electrode holder joint test conducting wire, and electrode holder is connecting
When conducting wire, electrode holder and power supply line are adjacent, and making electrode holder, there are torsion, when two electrode holders are connect with conducting wire, the machinery of conducting wire itself
Performance can resist electrode holder torsion, and still, conducting wire causes the reduction of conducting wire mechanical performance due to overcurrent, and irresistible electrode holder is turned round
Power will cause the case where conducting wire arches upward upwards, and melting trace when these influence factors will certainly be to conducting wire overcurrent fault produces
It is raw to influence.
Summary of the invention
It can not accurately be determined present invention aim to address existing conducting wire experimental rig and melt trace when conducting wire overcurrent fault
The problem of mark, provides a kind of different angle conducting wire overcurrent fault imitative experimental appliance.
Technical solution of the invention is as follows:
A kind of different angle conducting wire overcurrent fault imitative experimental appliance, including support frame, the first sliding rail, the first sliding block and
Adjust component；On the support frame, first sliding block is arranged on the first sliding rail, can be in the first sliding rail for the first sliding rail installation
Upper sliding；The adjusting component includes regulator bracket, tensioning spring, pulling force inductor, the second sliding rail, the second sliding block and spring
Fixed bracket；On the support frame, the spring fixator and regulator bracket are hinged for the regulator bracket fixed setting, and
It can be locked by locking device, one end of the tensioning spring is connect with spring fixator, and the other end is incuded by pulling force
Device is connect with the second sliding block, and second sliding rail is fixed on spring fixator, and second sliding block is arranged second
On sliding rail, it can be slided on the second sliding rail；Test lead one end is fixed on the second sliding block, and the other end is fixed at
On one sliding block.
Further, it is additionally provided with laser angle measuring instrument on the spring fixator, conveniently can accurately adjusts the
The position of one sliding block.
Further, test lead one end is fixed on the second sliding block by Quick Release electrode holder, and the other end passes through Quick Release
Weldering is fixed on the first sliding block, can quickly and easily pacify test lead dress.
Further, first sliding block is mounted on the first sliding rail by the first locking device, the first locking dress
It is set to lock-screw, the locking device is lock screw.
Further, second sliding block is mounted on the second sliding rail by the second locking device, the second locking dress
It is set to lock screw.
Further, first sliding rail is arc track, and arc track is quarter circular arc track.
Further, first sliding block and the second sliding block are all made of insulating materials production.
Further, first sliding block and the second sliding block are rubber block.
Further, support frame as described above is T shape frame body, cross-brace plate and vertical supporting plate including fixed setting.
It further, further include device for fixing screen on headrest, the cross-brace plate and vertical supporting plate are connected by device for fixing screen on headrest
It connects.
Compared with prior art, the present invention beneficial effect is:
Different angle conducting wire overcurrent fault imitative experimental appliance of the present invention adjusts conducting wire using laser angle measuring instrument and inclines
Angle, analog conducting wire overcurrent fault under different angle (0~90 °), in conducting wire one end installation pulling force inductor, experimentation
It keeps pulling force constant, makes conducting wire keep not influenced by external force straight in simulation process, so that conducting wire is complete during the test
Meet its practical characteristic, by simulating different angle conducting wire overcurrent fault, finds out overcurrent fault characteristic feature, provide
Accurate overcurrent melting trace provides technology for fire investigation and helps.
Detailed description of the invention
Fig. 1 is different angle conducting wire overcurrent fault imitative experimental appliance main view of the present invention；
Fig. 2 is different angle conducting wire overcurrent fault imitative experimental appliance right view of the present invention；
Fig. 3 is the adjusting component structure diagram of different angle conducting wire overcurrent fault imitative experimental appliance of the present invention.
Appended drawing reference: 1- support frame, 2- device for fixing screen on headrest, 3- adjust component, 4- test lead, the first sliding rail of 5-, 6- the
One locking device, the first sliding block of 7-, 8- regulator bracket, 9- spring fixator, 10- locking device, 11- laser angle are surveyed
Measure instrument, 12- tensioning spring, 13- pulling force inductor, 14- Quick Release electrode holder, the second sliding rail of 15-, the second sliding block of 16-, the lock of 17- second
Tight device, 18- cross-brace plate, 19- vertical supporting plate.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, Figure 2 and Figure 3, a kind of different angle conducting wire overcurrent fault imitative experimental appliance, including support frame
1, the first sliding rail 5, the first sliding block 7, device for fixing screen on headrest 2 and adjusting component 3；First sliding rail 5 is mounted on support frame 1, and first is sliding
Block 7 is arranged on the first sliding rail 5, can slide on the first sliding rail 5, and support frame 1 is T shape frame body, the transverse direction including fixed setting
Support plate 18 and vertical supporting plate 19, cross-brace plate 18 and vertical supporting plate 19 are connected by device for fixing screen on headrest 2；Adjusting group
Part 3 includes the fixed branch of regulator bracket 8, tensioning spring 12, pulling force inductor 13, the second sliding rail 15, the second sliding block 16 and spring
Frame 9；Regulator bracket 8 is fixed on support frame 1, and spring fixator 9 and regulator bracket 8 are hinged, and can pass through
Locking device 10 locks, and locking device 10 is specially lock screw, and one end of tensioning spring 12 is connect with spring fixator 9,
The other end is connect by pulling force inductor 13 with the second sliding block 16, and the second sliding rail 15 is fixed on spring fixator 9, the
Two sliding blocks 16 are arranged on the second sliding rail 15, can slide on the second sliding rail 15；It is sliding that 4 one end of test lead is fixed at second
On block 16, the other end is fixed on the first sliding block 7；Laser angle measuring instrument 11 is additionally provided on spring fixator 9,
For adjusting the position of the first sliding block 7 easily and fast.Specifically, 4 one end of test lead is fixedly installed by Quick Release electrode holder 14
On the second sliding block 16, the other end is fixed on the first sliding block 7 by Quick Release electrode holder 14.
First sliding block 7 is mounted on the first sliding rail 5 by the first locking device 6, and the first locking device 6 is lock-screw,
It can also be other locking devices.Second sliding block 16 is mounted on the second sliding rail 15 by the second locking device 17, the second locking dress
17 are set as lock-screw, can also be other locking devices.
First sliding rail 5 is arc track, and arc track is quarter circular arc track, arc track analog test
The overcurrent fault under different angle (0~90 °) of conducting wire 4, to guarantee insulation performance, the first sliding block 7 and the second sliding block 16 are adopted
It is made of insulating materials, rubber block specifically can be used.
In different angle conducting wire overcurrent fault imitative experimental appliance of the present invention, support frame 1 is experimental bench stainless steel stent,
For fixing 14 position of the first sliding block 7 and Quick Release electrode holder；Device for fixing screen on headrest 2 is the fixed foot prop of stainless steel, is used to support frame 1, prevents
Only experimental bench bracket shakes；Test lead 4 can simulate unlike material, the conducting wire of different line footpaths；It, can when simulating different angle
To change the direction of the first sliding block 7 by the first sliding rail 5, the first sliding rail 5 is the 1/4 round stainless steel of radius 1000mm；When
After angular adjustment, the position of the first sliding block 7 can be fixed by the first locking device, herein the first sliding block 7 and the first locking device
It being threadedly coupled, the first locking device can control sliding of first sliding block 7 in the first sliding rail 5, and the first sliding block 7 is insulating materials,
Prevent electric leakage in experimentation from causing unsafe problems.
In different angle conducting wire overcurrent fault imitative experimental appliance of the present invention, regulator bracket 8 is used for secured adjusted group
Part position, and can make to adjust 0~90 ° of component rotation；Spring fixator 9 is for fixing tensioning spring 12 and the second sliding rail
15；After the first sliding block 7 adjusts angle according to laser angle measuring instrument 11, using lock-screw by regulator bracket 8 and bullet
The fixed bracket 9 of spring is fixed；Laser angle measuring instrument 11 uses electronics angle measurement equipment, and precision is high, can quickly identify angle；Tensioning
Second sliding block 16 is in tensioning state, 13 measure traverse line pulling force of pulling force inductor by pulling force inductor 13 by spring 12；Quick Release
Electrode holder 14 is connected using the fixed experiment conducting wire of quick-disassembly structure with power supply；Second sliding rail 15 is adjusted according to pulling force inductor 13
Second sliding block, 16 position makes conducting wire be in normal tensile force, and when regulating wire tension, it is sliding to fix first by locking device
Block 7.
Different angle conducting wire overcurrent fault imitative experimental appliance of the present invention uses electronics angle laser measuring apparatus (laser angular
Spend measuring instrument) adjust conducting wire inclination angle, analog conducting wire overcurrent fault under different angle (0~90 °)；It installs and draws in conducting wire one end
Power inductor keeps pulling force constant in experimentation, makes conducting wire keep not influenced by external force straight in simulation process, so that leading
Line complies fully with its practical characteristic during the test, by simulating different angle conducting wire overcurrent fault, finds out electricity
Failure characteristic feature is flowed, accurate overcurrent melting trace is provided, technology is provided for fire investigation and helps.
Assuming that conducting wire overcurrent fault when this experiment 45 ° of inclination angle of simulation.
Step 1: first unscrewing lock screw, laser angle measuring instrument 11 is opened, adjusting the angle is 45 °, is then adopted
It is with locking device 10 that spring fixator 9 is fixed, according to the light that laser angle measuring instrument 11 is launched, make the first sliding block 7
Midpoint be overlapped with laser beam, 7 position of the first sliding block is fixed using the first locking device；
Step 2: Quick Release electrode holder 14 is separately fixed at the first sliding block 7, on the second sliding block 16, and with the first sliding block 7,
Second sliding block, 16 upper surface is parallel, then clamps test lead Quick Release electrode holder 14, with electric power generating composition circuit；
Step 3: the second sliding block is adjusted in the movement of the second sliding rail, meanwhile, rely on tensioning spring 12 to observe pulling force inductor 13
Numerical value, it is ensured that test lead both ends do not have an arc sag, keep test lead correct tension, finally fix the using the second locking device
Two sliding blocks 16, it is ensured that conducting wire has certain tensioning, finally powers on the different specified multiplying power overcurrent faults of simulation.
Claims (10)
1. a kind of different angle conducting wire overcurrent fault imitative experimental appliance, it is characterised in that: slided including support frame (1), first
Rail (5), the first sliding block (7) and adjusting component (3)；
First sliding rail (5) is mounted on support frame (1), and first sliding block (7) is arranged on the first sliding rail (5), can be
First sliding rail slides on (5)；
The adjusting component (3) includes regulator bracket (8), tensioning spring (12), pulling force inductor (13), the second sliding rail
(15), the second sliding block (16) and spring fixator (9)；
The regulator bracket (8) is fixed on support frame (1), the spring fixator (9) and regulator bracket (8)
Hingedly, it and can be locked by locking device (10), one end of the tensioning spring (12) is connect with spring fixator (9),
The other end is connect by pulling force inductor (13) with the second sliding block (16), and second sliding rail (15) is fixed at spring and fixes
On bracket (9), second sliding block (16) is arranged on the second sliding rail (15), can slide on the second sliding rail (15)；
Test lead (4) one end is fixed on the second sliding block (16), and the other end is fixed on the first sliding block (7).
2. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 1, it is characterised in that: the bullet
Spring is additionally provided with laser angle measuring instrument (11) on fixed bracket (9), for adjusting the position of the first sliding block (7).
3. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 2, it is characterised in that: test is led
Line (4) one end is fixed on the second sliding block (16) by Quick Release electrode holder (14), and the other end is fixed by Quick Release electrode holder (14)
It is arranged on the first sliding block (7), the locking device (10) is lock screw.
4. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 1 or 2 or 3, it is characterised in that:
First sliding block (7) is mounted on the first sliding rail (5) by the first locking device (6), and first locking device (6) is lock
Tight screw.
5. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 4, it is characterised in that: described
Two sliding blocks (16) are mounted on the second sliding rail (15) by the second locking device (17), and second locking device (17) is locking
Screw.
6. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 5, it is characterised in that: described
One sliding rail (5) is arc track, and arc track is quarter circular arc track.
7. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 6, it is characterised in that: described
One sliding block (7) and the second sliding block (16) are all made of insulating materials production.
8. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 7, it is characterised in that: described
One sliding block (7) and the second sliding block (16) are rubber block.
9. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 8, it is characterised in that: the branch
Support (1) is T shape frame body, cross-brace plate (18) and vertical supporting plate (19) including fixed setting.
10. different angle conducting wire overcurrent fault imitative experimental appliance according to claim 9, it is characterised in that: also wrap
It includes device for fixing screen on headrest (2), the cross-brace plate (18) and vertical supporting plate (19) are connected by device for fixing screen on headrest (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266680.4A CN110118901A (en) | 2019-04-03 | 2019-04-03 | Different angle conducting wire overcurrent fault imitative experimental appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266680.4A CN110118901A (en) | 2019-04-03 | 2019-04-03 | Different angle conducting wire overcurrent fault imitative experimental appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110118901A true CN110118901A (en) | 2019-08-13 |
Family
ID=67520766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910266680.4A Pending CN110118901A (en) | 2019-04-03 | 2019-04-03 | Different angle conducting wire overcurrent fault imitative experimental appliance |
Country Status (1)
| Country | Link |
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| CN (1) | CN110118901A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0168346A1 (en) * | 1984-06-18 | 1986-01-15 | Cables Cortaillod S.A. | Apparatus for measuring the resistance of conducting wires |
| CN202676843U (en) * | 2012-06-19 | 2013-01-16 | 王芸 | Short circuit melted mark device |
| CN105157940A (en) * | 2015-07-09 | 2015-12-16 | 天津大学 | Inclination angle step inflow condition deep sea tension type single standpipe vortex induced vibration test device |
| CN105222969A (en) * | 2015-09-18 | 2016-01-06 | 天津大学 | Inclination angle ladder incoming flow marine riser vortex swashs the-sharp coupled vibrations test unit of ginseng |
| CN105584944A (en) * | 2016-03-04 | 2016-05-18 | 中国矿业大学 | Device and method for improving detection of layer-to-layer transition of steel wire ropes |
| CN108538183A (en) * | 2018-05-10 | 2018-09-14 | 湖南科技大学 | One kind is based on the inclination adjustable pipe conveyer fault simulation experimental provision of operating mode lower angle |
| CN210109227U (en) * | 2019-04-03 | 2020-02-21 | 西安科技大学 | Different inclination wire overcurrent fault simulation experiment device |
-
2019
- 2019-04-03 CN CN201910266680.4A patent/CN110118901A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0168346A1 (en) * | 1984-06-18 | 1986-01-15 | Cables Cortaillod S.A. | Apparatus for measuring the resistance of conducting wires |
| CN202676843U (en) * | 2012-06-19 | 2013-01-16 | 王芸 | Short circuit melted mark device |
| CN105157940A (en) * | 2015-07-09 | 2015-12-16 | 天津大学 | Inclination angle step inflow condition deep sea tension type single standpipe vortex induced vibration test device |
| CN105222969A (en) * | 2015-09-18 | 2016-01-06 | 天津大学 | Inclination angle ladder incoming flow marine riser vortex swashs the-sharp coupled vibrations test unit of ginseng |
| CN105584944A (en) * | 2016-03-04 | 2016-05-18 | 中国矿业大学 | Device and method for improving detection of layer-to-layer transition of steel wire ropes |
| CN108538183A (en) * | 2018-05-10 | 2018-09-14 | 湖南科技大学 | One kind is based on the inclination adjustable pipe conveyer fault simulation experimental provision of operating mode lower angle |
| CN210109227U (en) * | 2019-04-03 | 2020-02-21 | 西安科技大学 | Different inclination wire overcurrent fault simulation experiment device |
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Effective date of abandoning: 20241025 |