CN2048623U - Current limiter - Google Patents
Current limiter Download PDFInfo
- Publication number
- CN2048623U CN2048623U CN 88221573 CN88221573U CN2048623U CN 2048623 U CN2048623 U CN 2048623U CN 88221573 CN88221573 CN 88221573 CN 88221573 U CN88221573 U CN 88221573U CN 2048623 U CN2048623 U CN 2048623U
- Authority
- CN
- China
- Prior art keywords
- spring
- current
- bias spring
- flow restricter
- stem
- 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.)
- Withdrawn
Links
- 229910004337 Ti-Ni Inorganic materials 0.000 claims description 6
- 229910011209 Ti—Ni Inorganic materials 0.000 claims description 6
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 3
- 229910001285 shape-memory alloy Inorganic materials 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a current limiter which takes titanium-nickle shape memory alloy to be a current limiting spring, comprising the components of a static contact (1), a movable contact (2), a casing (3), etc. The current limiter runs by the cooperation of a current limiting spring (7) and a biasing spring (4); when the current surpasses the rated value, the current is cut off immediately; after the electricity failure happens for 30-60 seconds, automatic resetting can be generated. The current limiter has three structural types, such as a basic type, a heavy-current type and a positioning type, and the current limiter is widely used in the light current engineering and the heavy-current engineering.
Description
The utility model belongs to the current limiting switch of electric heating operation and the technical field of protective overload circuit-breakin.
Known flow restricter has multiple version; wherein modal is fuse (being commonly called as fuse) or the fast acting fuse that the principle of utilizing the low-melting-point metal silk to fuse because of heating after by rated current is made; in recent years; Britain has invented and has a kind ofly utilized certain by the solid-state flow restricter that the low-melting-point metal of volume contraction is made when being converted into liquid state; also be to belong to when flowing through the current overload of its solid; thereby make current interruptions by the solid fusing, and work as the protective device that flow restricter cooling after-current can recover again.The shortcoming of fuse is to automatically reset, and the fuse that all need more renew again behind the current overload promptly occurs at every turn; And the shortcoming of flow restricter is can not cut off electric current fully when overload takes place, and action response time is also longer, so it is safe and reliable to be not so good as fuse when using, and it is introduced that this flow restricter is used for heavy current engineering more, volume is big, complex structure.
Safe and reliable when the purpose of this utility model provides a kind of use, the response time short; And can automatically resetly have fuse and flow restricter advantage current-limiting protection device.Flow restricter provided by the utility model is made up of parts such as fixed contact, moving contact, housings, it is characterized in that in housing, being equipped with in addition a bias spring and a current limliting spring, wherein: (1) bias spring adopts the stage clip structure, it is enclosed within on the stem stem of conduction, and its two ends are retrained by the bias spring collar on moving contact and the housing respectively; (2) the current limliting spring is the extension spring structure, and the one end is fixed on the conduction bottom of housing, and the other end is connected with the bias spring stem stem by screw; (3) housing and bias spring collar are connected as a single entity, and are made by insulating material; (4) the current limliting spring adopts Ti-Ni marmem to make material.
Its structural representation of flow restricter provided by the utility model as shown in Figure 1, in Fig. 1, (1) is fixed contact; (2) be moving contact; (3) be housing; (4) be the bias spring collar; (5) be bias spring; (6) bias spring stem stem; (7) the stray bullet spring that exceeds; (8) be bottom; (9) screw.
The operation principle of flow restricter provided by the utility model is described below in conjunction with Fig. 1.This flow restricter mainly is to utilize the shape memory effect of Ti-Ni alloy to come work.Though some alloy produces plastic deformation in (under the low temperature) below the transformation temperature stressed back, in case make it be heated to transformation temperature when above, it will recover the shape before the original not low-temperature deformation, that is to say, this alloy can " be remembered " shape that it is original, so be referred to as marmem.If in a single day this alloy is cooled to below the transformation temperature, can recover its low-temperature deformation state again, then claim this alloy to have double process shape-memory effect.Marmem with practical value mainly contains Ti-Ni marmem and copper-based shape memory alloy.This flow restricter adopts Ti-Ni marmem to make current limliting spring (7) material, with the moving contact (2) on its control flow restricter.When in the circuit during current overload, the memorial alloy of current limliting spring heating itself reaches alloy phase height master and promptly recovers high temperature shape (heating is shortened), affects bias spring stem stem (6), thereby moving contact is separated with fixed contact (1), cuts off the electricity supply.By the time after memorial alloy is cooled to transformation temperature following (about 30-60 of time second), the current limliting spring will recover high temperature shape (cooling elongation), this moment, the current limliting spring disappeared to the pulling force of bias spring stem stem, and under bias spring (5) drives, moving contact automatically resets and promptly contacts with fixed contact heavily again, circuit is connected, and power supply is normal power supply voluntarily.
The current capacity of considering the current limliting spring is limited, in order to adapt to the needs on the heavy current engineering, this flow restricter can add in addition puts a shunt that constitutes less than the bypass resistance of current limliting spring resistance and spring leaf with current limliting spring parallel resistor, like this, can increase the total current that flow restricter can pass through.
In order to know the special requirement of answering some electrical equipment, after flow restricter is cut off the electricity supply automatically, check again electrical equipment by the operator according to circumstances to be resetted.For this reason, add in addition and put one by being positioned on the retainer spring on the bias spring stem stem and being positioned on location notch on the housing and moving contact detent mechanism that the back-moving spring bar is formed.
Its structural principle of flow restricter provided by the utility model such as Fig. 1, Fig. 2 and shown in Figure 3, Fig. 1 are the axial cutaway view of basic model flow restricter, and Fig. 2 is the axial cutaway view of forceful electric power type flow restricter, and Fig. 3 is the axial cutaway view of locate mode flow restricter.In Fig. 1,2,3: (1) is that fixed contact (2) is a moving contact; (3) be housing; (4) be the bias spring collar; (5) be bias spring; (6) live for the bias spring core; (7) the stray bullet spring that exceeds; (8) be bottom; (9) be screw; (10) be bypass resistance; (11) be spring leaf; (12) retainer spring; (13) back-moving spring bar.
Flow restricter embodiment provided by the utility model is as follows:
Compare with Fig. 1, difference is that it is added with one group of shunt that is made of bypass resistance (10) and spring leaf (11) in addition, and correspondingly the shape of housing also slightly changes.Bypass resistance is in parallel in circuit with the current limliting spring, and the resistance of the resistance value ratio current limliting spring of bypass resistance will lack, and its numerical value can be calculated out by Ohm's law and parallel resistance computing formula according to the rated value and the working voltage of flow restricter.Consider by the current value of forceful electric power type flow restricter greatlyyer, the shape of its end cap of ore deposit and bottom has also been done corresponding change.
Compare with fuse, but the operation of this current limiter long-term safety need not to change; And compare with the low-melting-point metal current limiter, this occluder configurations is simple, and cost is low, and safe and reliable to operation. Because current limiter provided by the utility model all can be suitable for weak current engineering (electronics, telecommunication) and heavy current engineering (electric power), replace present fuse with it, can produce better Social benefit and economic benefit.
Claims (3)
1, a kind of flow restricter of being made up of fixed contact (1), moving contact (2), housing parts such as (3) is characterized in that being equipped with in addition in its housing a bias spring (4) and a current limliting spring (7), wherein:
A) bias spring adopts the stage clip structure, and it is enclosed within on the bias spring stem stem (6) of conduction, and two ends are retrained by the bias spring collar (4) on moving contact and the housing respectively;
B) the current limliting spring is the extension spring structure, and it adopts Ti-Ni marmem to make, and the one end is fixed on the bottom (8) of conduction, and the other end is connected with the bias spring stem stem by screw (9);
C) housing and bias spring collar are connected as a single entity, and are made by insulating material.
2, by the described flow restricter of claim 1, it is characterized in that adding in addition put one by with the parallel connection of current limliting spring, resistance is less than the bypass resistance (10) of limit spring resistance and the shunt of spring leaf (11) formation.
3, by the described flow restricter of claim 1, it is characterized in that adding in addition and put one by being positioned on the retainer spring (12) on the bias spring stem stem (6) and being positioned on the moving contact detent mechanism that the back-moving spring bar (13) in the housing location notch is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88221573 CN2048623U (en) | 1988-12-29 | 1988-12-29 | Current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88221573 CN2048623U (en) | 1988-12-29 | 1988-12-29 | Current limiter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2048623U true CN2048623U (en) | 1989-11-29 |
Family
ID=4853573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88221573 Withdrawn CN2048623U (en) | 1988-12-29 | 1988-12-29 | Current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2048623U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894693A (en) * | 2009-05-20 | 2010-11-24 | 通用汽车环球科技运作公司 | Adopt the circuit arrangement of active material actuation |
| CN107709889A (en) * | 2015-06-24 | 2018-02-16 | 布莱克曼两合公司 | Terminating set for the tubulose firing equipment with integrated fuse |
| CN108397329A (en) * | 2018-02-09 | 2018-08-14 | 中国第汽车股份有限公司 | High-power diesel engine current limiter |
| TWI676201B (en) * | 2018-07-03 | 2019-11-01 | 易湘雲 | Switch with thermal breaker and power socket comprising such switch |
| CN117144274A (en) * | 2023-10-30 | 2023-12-01 | 武汉科技大学 | Preparation method of nickel-titanium alloy and overload automatic circuit breaking protector |
-
1988
- 1988-12-29 CN CN 88221573 patent/CN2048623U/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894693A (en) * | 2009-05-20 | 2010-11-24 | 通用汽车环球科技运作公司 | Adopt the circuit arrangement of active material actuation |
| CN107709889A (en) * | 2015-06-24 | 2018-02-16 | 布莱克曼两合公司 | Terminating set for the tubulose firing equipment with integrated fuse |
| CN107709889B (en) * | 2015-06-24 | 2021-01-05 | 布莱克曼两合公司 | Termination device for tubular heating apparatus with integrated fuse |
| US11204186B2 (en) | 2015-06-24 | 2021-12-21 | Bleckmann Gmbh & Co. Kg | Terminal device for a tubular heating device with integrated fuse |
| CN108397329A (en) * | 2018-02-09 | 2018-08-14 | 中国第汽车股份有限公司 | High-power diesel engine current limiter |
| CN108397329B (en) * | 2018-02-09 | 2020-08-25 | 中国第一汽车股份有限公司 | Current limiter for high-power diesel engine |
| TWI676201B (en) * | 2018-07-03 | 2019-11-01 | 易湘雲 | Switch with thermal breaker and power socket comprising such switch |
| CN117144274A (en) * | 2023-10-30 | 2023-12-01 | 武汉科技大学 | Preparation method of nickel-titanium alloy and overload automatic circuit breaking protector |
| CN117144274B (en) * | 2023-10-30 | 2024-02-02 | 武汉科技大学 | Preparation method of nickel-titanium alloy and overload automatic circuit breaking protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |