CN201041787Y - Open temperature insurance tube - Google Patents
Open temperature insurance tube Download PDFInfo
- Publication number
- CN201041787Y CN201041787Y CNU2007200223414U CN200720022341U CN201041787Y CN 201041787 Y CN201041787 Y CN 201041787Y CN U2007200223414 U CNU2007200223414 U CN U2007200223414U CN 200720022341 U CN200720022341 U CN 200720022341U CN 201041787 Y CN201041787 Y CN 201041787Y
- Authority
- CN
- China
- Prior art keywords
- shell body
- fuse
- link
- movable electrode
- gasket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a thermodynamic switch, in particular to an electric switch whose contact point can be caused to move by the fusing of the fuse material. An open temperature fuse tube includes an outer shell body, an upper lead, a lower lead, and an insulated ceramic bead, a straight spring, a movable electrode, an upper pad, a ball spring, a lower pad, and a fuse body which are arranged inside the outer shell body. The upper end and the lower end of the outer shell body are respectively connected with the upper lead and the lower lead, the straight spring is arranged between the insulated ceramic bead and the movable electrode, the movable electrode is arranged on the upper pad, the ball spring is arranged between the upper pad and the lower pad, the fuse body is arranged between the lower pad and the bottom of the outer shell body. The utility model is characterized in that a protective layer is arranged between the lower pad and the bottom of the outer shell body, the protective layer wraps the fuse body completely to ensure that the fuse body is isolated with air.
Description
Technical field
The utility model relates to a kind of thermal switch, relates in particular to the electric switch that a kind of fusing by fusible material causes the contact element action.
Background technology
The fuse-link that ambient temperature when temperature safety tube is mounted on the electric appliance circuits electrical equipment used is carried out effective monitoring surpasses the ability to bear of electrical equipment when ambient temperature raises, and temperature safety tube can be cut off the electricity supply automatically, may be to the destruction of electrical equipment thereby avoid.Fuse-link is very responsive to thermotonus, responsive equally to the reaction of oxidation in the air dielectric and wet components simultaneously, for guaranteeing that fuse-link is not subjected to the influence of air and external environment condition, the customary risks pipe adopts closed structure, but there is following drawback in closed structure: when ambient temperature raises, press in forming in the protective tube, press big more in temperature is high more.When internal pressure exceeds the pressure-bearing limit of protective tube peripheral structure, explosion must take place in protective tube, fail safe is not high, and this just equals to bury for the insurance of temperature aspect the hidden danger of the too high body explosion that causes of Yin Wendu, and sealing has limited the development of temperature safety tube to the higher temperature section.
Chinese patent as bulletin on November 5th, 2003; notification number is CN2585394Y; it discloses a kind of thermal fuse-link protector; comprise contact lead, sealed piece, insulation porcelain bead, shell, lead-in wire; be provided with temperature sensing agent, barrel-shaped spring, compression spring, moving contact in the enclosure; shell is by the parts sealing of sealing compound with inside, and it can realize the protection of temperature.But just as what point out above, its hermetically-sealed construction is unsurmountable contradiction with the lifting of protection temperature, and hermetically-sealed construction will inevitably influence the lifting of Temperature protection protection of pipe temperature.
Summary of the invention
The objective of the invention is to overcome above-mentioned defective, provide and press safe series of temperatures protective tube in a kind of nothing, fundamentally eliminate and press hidden danger in the protective tube.
For achieving the above object, the utility model adopts following technical scheme: it comprises shell body, upper conductor, lower wire and the insulation porcelain bead that is arranged on shell body inside, straight spring, movable electrode, Upper gasket, the ball spring, lower gasket, fuse-link, the two ends up and down of shell body connect upper conductor and lower wire respectively, between insulation porcelain bead and the movable electrode straight spring is set, movable electrode is arranged on the Upper gasket, the ball spring is set between Upper gasket and the lower gasket, between lower gasket and the shell body bottom fuse-link is set, be provided with overcoat between lower gasket and the shell body bottom, overcoat wraps up fuse-link fully, makes fuse-link and air isolated.
Overcoat adopts organic material, has identical or approaching fusing point with fuse-link, and both fusing point differences are in 10 ℃.The top of shell body is provided with protection porcelain cap, protection porcelain cap sleeve is on shell body, air can be from both contact position free flows, make the shell body external and internal pressure identical, overcome defective of the prior art, broken through 240 ℃ of safe temperature limit of existing temperature safety tube, made the safe temperature of temperature safety tube can reach 360 ℃.The positioning boss of fixed protection porcelain cap is set on the upper conductor, and positioning boss is positioned at the top of protection porcelain cap, can prevent to protect coming off of porcelain cap.
The utility model has fundamentally changed the dangerous structure of existing closed temperature safety tube, for the temperature safety tube of developing the higher temperature section provides reliable guidance.
Description of drawings
Fig. 1 is the internal structure schematic diagram of temperature safety tube in the prior art;
Fig. 2 is an internal structure schematic diagram of the present utility model.
Embodiment
The utility model comprises shell body 1, upper conductor 3, lower wire 2 and is arranged on the insulation porcelain bead 4 of shell body 1 inside, straight spring 5, movable electrode 6, Upper gasket 7, ball spring 9, lower gasket 8, fuse-link 11, the two ends up and down of shell body 1 connect upper conductor 3 and lower wire 2 respectively, between insulation porcelain bead 4 and the movable electrode 6 straight spring 5 is set, movable electrode 6 is arranged on the Upper gasket 7, between Upper gasket 7 and the lower gasket 8 ball spring 9 is set, between lower gasket 8 and shell body 1 bottom fuse-link 11 is set, fuse-link 11 is wrapped in the overcoat 12 that completely cuts off with air.
The top of shell body 1 is provided with protection porcelain cap 13, and protection porcelain cap 13 is enclosed within on the shell body 1, and the positioning boss 14 of fixed protection porcelain cap 13 is set on the upper conductor 3, and positioning boss 14 is positioned at the top of protection porcelain cap 13.
Because fuse-link 11 is solid-state under the normal temperature, thus when normal operation circuit, the temperature safety tube attonity, straight spring 5 is in compressive state; When temperature reached the fusing point of fuse-link 11 when abnormal conditions appear in circuit, fuse-link 11 was by solid-state liquefy, volume-diminished; straight spring 5 is pressed down movable electrode 6 by the compressive state elongation, and movable electrode 6 and upper conductor 3 are disconnected; thereby cut off the electricity supply, play a protective role.
Claims (4)
1. open temperature safety tube, it comprises shell body, upper conductor, lower wire and the insulation porcelain bead that is arranged on shell body inside, straight spring, movable electrode, Upper gasket, the ball spring, lower gasket, fuse-link, the two ends up and down of shell body connect upper conductor and lower wire respectively, between insulation porcelain bead and the movable electrode straight spring is set, movable electrode is arranged on the Upper gasket, the ball spring is set between Upper gasket and the lower gasket, between lower gasket and the shell body bottom fuse-link is set, it is characterized in that being provided with overcoat between lower gasket and the shell body bottom, overcoat wraps up fuse-link fully, makes fuse-link and air isolated.
2. open temperature safety tube according to claim 1 is characterized in that overcoat is an organic material, has identical fusing point with fuse-link.
3. open temperature safety tube according to claim 1 and 2 is characterized in that the top of shell body is provided with protection porcelain cap.
4. open temperature safety tube according to claim 3 is characterized in that being provided with on the upper conductor that the positioning boss of fixed protection porcelain cap, positioning boss are positioned at the top of protection porcelain cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200223414U CN201041787Y (en) | 2007-05-18 | 2007-05-18 | Open temperature insurance tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200223414U CN201041787Y (en) | 2007-05-18 | 2007-05-18 | Open temperature insurance tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201041787Y true CN201041787Y (en) | 2008-03-26 |
Family
ID=39253501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200223414U Expired - Fee Related CN201041787Y (en) | 2007-05-18 | 2007-05-18 | Open temperature insurance tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201041787Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324340A (en) * | 2011-09-15 | 2012-01-18 | 江阴市志翔电子科技有限公司 | Thermal cutoff with bundled type contact line |
| CN105679603A (en) * | 2016-03-18 | 2016-06-15 | 厦门赛尔特电子有限公司 | Temperature-sensing type change-over switch |
-
2007
- 2007-05-18 CN CNU2007200223414U patent/CN201041787Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324340A (en) * | 2011-09-15 | 2012-01-18 | 江阴市志翔电子科技有限公司 | Thermal cutoff with bundled type contact line |
| CN105679603A (en) * | 2016-03-18 | 2016-06-15 | 厦门赛尔特电子有限公司 | Temperature-sensing type change-over switch |
| CN105679603B (en) * | 2016-03-18 | 2018-03-13 | 厦门赛尔特电子有限公司 | A kind of temperature sensitive type change-over switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080326 |