CN210403647U - Fuse with fusing indicator - Google Patents
Fuse with fusing indicator Download PDFInfo
- Publication number
- CN210403647U CN210403647U CN201921316447.4U CN201921316447U CN210403647U CN 210403647 U CN210403647 U CN 210403647U CN 201921316447 U CN201921316447 U CN 201921316447U CN 210403647 U CN210403647 U CN 210403647U
- Authority
- CN
- China
- Prior art keywords
- fuse
- nitrocotton
- shell
- window
- flame
- 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.)
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Links
- 229920001220 nitrocellulos Polymers 0.000 claims abstract description 45
- 229910001006 Constantan Inorganic materials 0.000 claims abstract description 23
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003063 flame retardant Substances 0.000 claims abstract description 20
- 239000010445 mica Substances 0.000 claims description 12
- 229910052618 mica group Inorganic materials 0.000 claims description 12
- 239000000020 Nitrocellulose Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Abstract
A fuse with a fusing indicator comprises a shell, contact knives arranged in the shell and a fuse body fixed between the contact knives; it is characterized in that the shell is provided with a window; nitrocotton is arranged in the window, and after the constantan wire positioned in the shell passes through the nitrocotton, the two ends of the constantan wire are respectively connected with the contact knives; and colored flame-retardant paper is arranged on the nitrocotton. The utility model discloses a fuse, its indicator simple structure, the dependable performance is convenient for in time detect which fuses damage to the fuse to damage is maintained and is changed.
Description
Technical Field
The utility model relates to a circuit protection of trades such as electric power, electron, new energy automobile especially indicates to be applied to circuit protection's fuse.
Background
The fuse is a component which melts or mechanically breaks the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so that the circuit is broken to protect equipment, instruments and the like in the circuit. The fuse is widely applied to high-low voltage distribution systems, control systems, electric equipment and new energy automobiles, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector. The fuse can be divided into a plug-in fuse and a hook fuse in a mode of connecting a contact knife and a circuit, and also can be divided into a filler fuse, a non-filler fuse and the like according to the existence or nonexistence of filler. The general main structure of the device comprises a shell, a melt arranged in the shell, and a contact knife which is positioned outside the shell and is connected with the melt. When the breaking voltage is high and the electric arc is easy to generate, the shell can be filled with arc extinguishing medium, and when the breaking voltage is low and the electric arc is not easy to generate, the arc extinguishing medium can not be filled. Typically, multiple melts are welded in one fuse.
In the kind of fuse, there is a fuse with fusing indicator, and after the fusing, the indicator then can light, carries out the fusing warning to conveniently maintain. Internal structure of fuse with indicator: the inner wall of the fuse shell is provided with a conductive constantan wire, the center of the constantan wire is bent (the constantan wire is not broken and is only bent), a spring is arranged at the bent part, the bent part of the constantan wire provided with the spring is placed in a through hole formed in the wall of the fuse shell, and an indicator for triggering properties is arranged on the spring. When the fuse is fused, the spring upwards bounces to trigger the cutter indicator to work and alarm, so that the fuse is indicated to be fused and needs to be maintained and replaced. Although the working effect of the fuse indicator is good, the fuse indicator has the defects that the indicator part is complex in structure and has a plurality of parts, and the constantan wire is easy to break, so that the indicator fails and does not work.
Disclosure of Invention
The utility model aims to solve the technical problem that a fuse that can melt and indicate is provided, its structure is simpler, and the operational reliability is high.
In order to solve the technical problem, the technical scheme provided by the utility model is a fuse with a fusing indicator, which comprises a shell, contact knives arranged in the shell and a melt fixed between the contact knives; it is characterized in that the shell is provided with a window; nitrocotton is arranged in the window, and after the constantan wire positioned in the shell passes through the nitrocotton, the two ends of the constantan wire are respectively connected with the contact knives; and colored flame-retardant paper is arranged on the nitrocotton.
A nitrocotton box is arranged on the lower end shell of the window, and the nitrocotton is filled in the nitrocotton box; the flame-retardant paper and the transparent mica sheet are arranged on the upper surface in the nitrocotton box from bottom to top; the flame-retardant paper and the mica sheet are both positioned in the view field of the window; the constantan wire penetrates through the nitrocotton box, and two ends of the constantan wire are respectively connected with the contact knife.
The upper surface of the nitrocotton box is provided with a boss, nitrocotton is filled in the nitrocotton box, and the flame retardant paper and the mica sheet are sequentially arranged on the boss; the mica sheet and the flame-retardant paper are abutted against the lower end of the window.
The utility model discloses a fuse, nitrocotton's spontaneous combustion point is about 180 ℃, and according to the regulation in the national standard GB/T13539, the fuse contacts under normal operating mode state that the sword temperature is the highest can not exceed 85 k. The novel structure heats the nitrocotton by conducting heat through the constantan wires carried on the contact knives on two sides, and the central temperature is lower than 85k after the constantan wires are subjected to heat loss, so that the nitrocotton can not be spontaneously combusted when the fuse works normally, and the nitrocotton works normally. Thus, the red flame-retardant paper under the transparent mica sheet is kept in the original state, and the indicator is normal. When the circuit is overloaded or fused in a short circuit mode, the constantan wire conducts heat energy to the nitrocotton after the temperature of the contact knife exceeds 180 ℃ to rapidly heat the nitrocotton to enable the nitrocotton to spontaneously combust, red flame-retardant paper is carbonized and blackened, the red flame-retardant paper is observed through a window and becomes black, and then the fuse is known to be fused and needs to be replaced. Through having the fusing indicator, can in time judge certain fuse fusing of a certain department, in time to its maintenance change, can shorten maintenance duration.
The utility model discloses a fuse, its indicator simple structure, the dependable performance is convenient for in time detect which fuses damage to the fuse to damage is maintained and is changed.
Drawings
Fig. 1 is a schematic sectional structure diagram of the fuse.
Fig. 2 is a schematic view of a conductive wire structure sleeved with an insulating sleeve.
Detailed Description
With respect to the above technical solutions, preferred embodiments are described in detail with reference to the drawings. Referring to fig. 1-2, wherein:
the fuse comprises a shell 1, wherein a contact knife 2 is arranged in the shell, and one end of the contact knife extends out of the shell and is positioned outside the shell. The two ends of the melt 3 in the shell are welded on the contact knife. A window hole 4 is arranged on the upper end surface of the shell. The upper surface of the nitrocotton box is provided with a convex column which can be filled and fixed in the window hole, and the nitrocotton box positioned at the periphery of the convex column is filled with nitrocotton 51. The red flame-retardant paper 6 is sleeved on the convex column and positioned on the nitrocotton box, and the transparent mica sheet 7 is arranged on the flame-retardant paper. The inner wall of the shell body positioned at the periphery of the window hole in the shell body is provided with a groove for clamping and sleeving the nitrocotton box, and the nitrocotton box is fixed in the groove. The mica sheet and the flame-retardant paper are positioned in the view window hole. After the constantan wire 8 passes through the nitrocellulose box, two ends of the constantan wire are respectively fixed on the contact knife through high-temperature conductive adhesive.
The working principle of the fuse disclosed by the invention is as follows: the self-ignition point of the nitrocotton is about 180 ℃, and the maximum contact temperature of the fuse cannot exceed 85k under the normal working condition state according to the regulation of the national standard GB/T13539. The novel structure heats the nitrocotton by conducting heat through the constantan wires carried on the contact knives on two sides, and the central temperature is lower than 85k after the constantan wires are subjected to heat loss, so that the nitrocotton can not be spontaneously combusted when the fuse works normally, and the nitrocotton works normally. Thus, the red flame-retardant paper under the transparent mica sheet is kept in the original state, and the indicator is normal.
When the circuit is overloaded or fused in a short circuit mode, the constantan wire conducts heat energy to the nitrocotton after the temperature of the contact knife exceeds 180 ℃ to rapidly heat the nitrocotton to enable the nitrocotton to spontaneously combust, red flame-retardant paper is carbonized and blackened, the red flame-retardant paper is observed through a window and becomes black, and then the fuse is known to be fused and needs to be replaced. Through having the fusing indicator, can in time judge certain fuse fusing of a certain department, in time to its maintenance change, can shorten maintenance duration.
Claims (3)
1. A fuse with a fusing indicator comprises a shell, contact knives arranged in the shell and a fuse body fixed between the contact knives; it is characterized in that the shell is provided with a window; nitrocotton is arranged in the window, and after the constantan wire positioned in the shell passes through the nitrocotton, the two ends of the constantan wire are respectively connected with the contact knives; and colored flame-retardant paper is arranged on the nitrocotton.
2. A fuse with a fuse indicator according to claim 1, wherein a nitrocellulose case is provided on the lower end housing of the window, the nitrocellulose case being filled therein; the flame-retardant paper and the transparent mica sheet are arranged on the upper surface in the nitrocotton box from bottom to top; the flame-retardant paper and the mica sheet are both positioned in the view field of the window; the constantan wire penetrates through the nitrocotton box, and two ends of the constantan wire are respectively connected with the contact knife.
3. A fuse with a fuse indicator according to claim 2, wherein the nitrocellulose case has a boss thereon, the nitrocellulose is filled in the nitrocellulose case, and the flame retardant paper and the mica sheet are sequentially disposed on the boss; the mica sheet and the flame-retardant paper are abutted against the lower end of the window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316447.4U CN210403647U (en) | 2019-08-14 | 2019-08-14 | Fuse with fusing indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316447.4U CN210403647U (en) | 2019-08-14 | 2019-08-14 | Fuse with fusing indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210403647U true CN210403647U (en) | 2020-04-24 |
Family
ID=70337944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921316447.4U Active CN210403647U (en) | 2019-08-14 | 2019-08-14 | Fuse with fusing indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210403647U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116525383A (en) * | 2023-04-11 | 2023-08-01 | 广东中贝能源科技有限公司 | Fuse with temperature control indicating device |
-
2019
- 2019-08-14 CN CN201921316447.4U patent/CN210403647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116525383A (en) * | 2023-04-11 | 2023-08-01 | 广东中贝能源科技有限公司 | Fuse with temperature control indicating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 710075 Zhongrong Electric Industrial Base, No. 97, Jinye Second Road, High tech Zone, Xi'an, Shaanxi Patentee after: XI'AN ZHONGRONG ELECTRIC Co.,Ltd. Address before: Room 3-10303, East District, modern enterprise center, No.12, zone a, pioneer R & D Park, 69 Jinye Road, high tech Zone, Xi'an City, Shaanxi Province, 710077 Patentee before: XI'AN ZHONGRONG ELECTRIC Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |