CN207233677U - A kind of fuse unit of good heat dissipation effect - Google Patents
A kind of fuse unit of good heat dissipation effect Download PDFInfo
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- CN207233677U CN207233677U CN201721283485.5U CN201721283485U CN207233677U CN 207233677 U CN207233677 U CN 207233677U CN 201721283485 U CN201721283485 U CN 201721283485U CN 207233677 U CN207233677 U CN 207233677U
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- fuse unit
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- fuse
- copper rod
- heat dissipation
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Abstract
The utility model discloses a kind of fuse unit, particularly a kind of fuse unit of good heat dissipation effect.The utility model includes fuse unit cylinder, the end of incoming cables being connected with pole and the leading-out terminal being connected with operating mechanism are provided with the fuse unit cylinder, the fuse unit cylinder is followed successively by outer wall, air cavity, inner wall, vacuum chamber and fusible link from outside to inside, the end of incoming cables connects vacuum chamber by inlet wire copper rod, inlet wire copper rod is recessed into wire casing in the end face of end of incoming cables, described to be engaged into wire casing with the wiring of pole.The temperature of gas can directly change the temperature in vacuum chamber everywhere in the utility model, while the gas flowed can greatly promote heat transfer effect as the medium of heat convection, so as to fundamentally solve vacuum heat dissipation problem.
Description
Technical field
A kind of fuse unit is the utility model is related to, particularly a kind of fuse unit of good heat dissipation effect.
Background technology
Fuse unit is that one kind is widely used in high and low voltage electric distribution system and control system and electrical equipment, plays safety and protects
The effect of shield.It is made of melt and load melt part and fuse unit base.When electric current exceedes setting, produced with itself
Heat makes melt fuse, so that circuit disconnects.
Fuse is fitted with conventional fuse cylinder, completing circuit by fuse blows fusible link disconnects, but in voltage mistake
In the case of height, breakdown may be directly contributed, so that circuit can not disconnect, the whole of machine is so will result in and burns out,
Consequence is hardly imaginable.Therefore in order to specially set vacuum extinction in fuse, but in a vacuum due to mainly by heat loss through radiation
And heat conduction, in the case where heat-conducting effect is bad, heat-transfer effect is very poor, so as to cause fuse local temperature excessive, with
Therefore the fuse cartridge unit that fuse connects may cause to burn out, can not continue to operate, add use cost.
Utility model content
The purpose of this utility model is that：In view of the above-mentioned problems, the utility model provides a kind of dissipating using vacuum power-off
The good fuse unit of thermal effect.
The technical solution adopted in the utility model is as follows：
A kind of fuse unit of good heat dissipation effect, including fuse unit cylinder, be provided with the fuse unit cylinder end of incoming cables and
Leading-out terminal, the fuse unit cylinder are followed successively by outer wall, air cavity, inner wall, vacuum chamber and fusible link from outside to inside, and the end of incoming cables leads to
Inlet wire copper rod connection vacuum chamber is crossed, inlet wire copper rod is recessed into wire casing in the end face of end of incoming cables；
The leading-out terminal connects vacuum chamber by outlet copper rod, and outlet copper rod is recessed outlet in the end face of leading-out terminal
Groove；
Octafluorocyclobutane gas is filled with the air cavity；
The fusible link connects inlet wire copper rod with outlet copper rod in vacuum chamber, and fusible link stretching is tightened, on fusible link
It is connected with multiple ventilation devices, the ventilation device includes fuse, striker and venthole, and the striker is T-type structure, striker
Including raming, hitting body and hit point, described ram is fixedly connected with fuse, and the fuse is fastened on fusible link, and fuse
Stretch tight；Ram and inner wall is connected by resetting spring, the resetting spring stretching is tight；
It is described to hit on body is vertically set on and rams, hit body and run through resetting spring, the point that hits is hit positioned at the other end for hitting body
Point is towards inner wall, and it is towards inner wall direction and the descending conical structure of internal diameter to hit point；
Multiple ventholes are additionally provided with inner wall, the center of any venthole is ramed in straight line with adjacent
On, and the quantity and the quantity of venthole ramed correspond, covered with insulated enclosure film on venthole；
Air inlet and gas outlet are additionally provided with the outer wall, the air inlet and the gas outlet are connected with air cavity.
Preferably, the fuse unit cylinder is additionally provided with ground terminal, and the ground terminal sequentially passes through ground connection copper rod and conduction
Fingertip connects outlet copper rod, and ground connection copper rod is recessed ground connection wire casing in the end face of ground terminal.
Preferably, the air inlet connection high-pressure pump.
Preferably, the outer wall and inner wall are made by epoxy resin.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are：
A kind of fuse unit of good heat dissipation effect in the utility model, to inner wall, inlet wire copper pipe and can be gone out by gas
Line copper pipe is preheated, and is prevented because supercooling causes workpiece to split, and when fuse unit works normally, can be to inner wall, inlet wire
Copper pipe and outlet copper pipe radiate, and prevent since overheat causes serious consequence.
A kind of fuse unit of good heat dissipation effect in the utility model, gas can flow always, and inner wall can be carried out
Heat convection, and take heat out of fuse unit so that heat transfer effect is more preferable, it is easier to reaches preferable effect.
A kind of fuse unit of good heat dissipation effect in the utility model, fusible link is specially set in the vacuum chamber, pass through
Vacuum reaches the effect to fuse completely.
A kind of fuse unit of good heat dissipation effect in the utility model, directly uses fusible link in vacuum chamber by inlet wire copper
Rod is connected with outlet copper rod, rather than selection insertion fuse, because conventional fuse can not use herein, and is used specially
Fuse can then increase R＆D costs, therefore directly using fuse unit as disposable, since there are high pressure at the same time in fuse unit
And vacuum state, although this method adds use cost, but can reduce the structure complexity of fuse unit, and improves product
Yields, prevent because replace internal part so that seal it is bad caused by gas leakage either caused by loose contact electric leakage or
Circuit is unstable, and more layer numbers that the complicated band for reducing structure is come so that heat transfer effect gets a promotion, while this is greatly improved
The stability of product.
A kind of fuse unit of good heat dissipation effect in the utility model, gas select octafluorocyclobutane, and without using SF6,
It is because SF6 is a kind of greenhouse gases, does not select it, to more environment-friendly, and water is easily breakdown under high voltages, therefore
Although the heat dissipation effect of water is more preferable, also without using.
A kind of fuse unit of good heat dissipation effect in the utility model, the temperature of gas can directly change in vacuum chamber respectively
The temperature at place, while the gas flowed can greatly promote heat transfer effect, so as to fundamentally solve as the medium of heat convection
Certainly vacuum heat dissipation problem.
A kind of fuse unit of good heat dissipation effect in the utility model, when fusible link fuses, the fuse of tight state
Fuse together so that resetting spring acts at once, drives striker to poke the insulated enclosure film on venthole, and whole process reaction is fast
Speed, and fully achieve automation, it is not necessary to external interference.
A kind of fuse unit of good heat dissipation effect in the utility model, the heat transfer and electric conductivity due to fusible link are pretty good,
Therefore the generally same temperature under abnormal condition, therefore can complete moment and integrally fuse, and the reaction of resetting spring is fast
Degree far below fusing speed, therefore thoroughly after arc extinguishing, can just be exposed together by the insulated enclosure film on all ventholes so that
Gas can come in faster speed.
A kind of fuse unit of good heat dissipation effect in the utility model, after inner and outer air pressure reaches equality, closes on air inlet
The ventilation gas inlet hole of side, closes on the venthole outlet of gas outlet side, and the gas of flowing directly can take heat out of vacuum
Chamber, completes further heat dissipation.
Brief description of the drawings
Fig. 1 is the utility model structure chart；
Marked in figure：1- gas outlets；2- ends of incoming cables；3- is into wire casing；4- inlet wire copper rods；5- vacuum chambers；6- ventholes；7- melts
Fracture of wire；8- line outlet grooves；9- leading-out terminals；10- outlet copper rods；11- conductive contact fingers；12- air inlets；13- is grounded copper rod；14- is grounded
End；15- is grounded wire casing；16- strikers；17- resetting springs；18- inner walls；19- outer walls；20- air cavitys；21- fuses.
Embodiment
All features disclosed in this specification, can be with any in addition to mutually exclusive feature and/or step
Mode combines.
Embodiment one
The present embodiment is as shown in Figure 1, a kind of fuse unit of good heat dissipation effect, including fuse unit cylinder, the fuse unit cylinder
Be provided with end of incoming cables 2 and leading-out terminal 9 on body, the fuse unit cylinder be followed successively by from outside to inside outer wall 19, air cavity 20, inner wall 18,
Vacuum chamber 5 and fusible link 7, the end of incoming cables 2 connect vacuum chamber 5 by inlet wire copper rod 4, and inlet wire copper rod 4 is in the end face of end of incoming cables 2
It is recessed into wire casing 3；
The leading-out terminal 9 connects vacuum chamber 5, end face concave shaped of the outlet copper rod 10 in leading-out terminal 9 by outlet copper rod 10
Into line outlet groove 8；
Octafluorocyclobutane gas is filled with the air cavity 20；
The fusible link 7 connects inlet wire copper rod 4 with outlet copper rod 10 in vacuum chamber 5, and the stretching of fusible link 7 is tightened, and is melted
Multiple ventilation devices are connected with fracture of wire 7, the ventilation device includes fuse 21, striker 16 and venthole, the striker 16
For T-type structure, striker 16 includes raming, hitting body and hit point, and described ram is fixedly connected with fuse 21, and the fuse 21 fastens
On fusible link 7, and fuse 21 stretch it is tight；Ram and inner wall 18 is connected by resetting spring 17, the resetting spring 17 is drawn
Stretch tight；
It is described to hit on body is vertically set on and rams, hit body and run through resetting spring 17, the point that hits positioned at the other end for hitting body,
Point is hit towards inner wall 18, and it is towards 18 direction of inner wall and the descending conical structure of internal diameter to hit point；
Multiple ventholes 6 are additionally provided with inner wall 18, the center of any venthole 6 is ramed in one with adjacent
On straight line, and the quantity ramed and the quantity of venthole 6 correspond, covered with insulated enclosure film on venthole 6；
It is additionally provided with air inlet 12 and gas outlet 1 on the outer wall 19, the air inlet 12 and the gas outlet 1 are and gas
Chamber 20 connects.
In use, air inlet 12 is inwardly blown into gas, can be by gas to inner wall when fuse unit does not work
18th, inlet wire copper pipe 4 and outlet copper pipe 10 are preheated, and are prevented because supercooling causes workpiece to split, and are worked normally in fuse unit
When, it can radiate, be prevented since overheat causes serious consequence to inner wall 18, inlet wire copper pipe 4 and outlet copper pipe 10.
Since a part is flowed out from gas outlet 1, gas can flow always, and gas can carry out convection current to inner wall 18
Heat exchange, and take heat out of fuse unit so that heat transfer effect is more preferable, it is easier to reaches preferable effect.
Directly inlet wire copper rod 4 is connected with outlet copper rod 10 in vacuum chamber 5 using fusible link 7, rather than selection insertion
Fuse, because conventional fuse can not use herein, and uses special fuse then to increase R＆D costs, therefore directly will
Although fuse unit to add use as disposable, since there are high pressure and vacuum state, this method at the same time in fuse unit
Cost, but the structure complexity of fuse unit can be reduced, and the yields of product is improved, prevent from causing because replacing internal part
Seal it is bad caused by gas leakage electric leakage or circuit are unstable either caused by loose contact, and the complicated band for reducing structure is come
More layer numbers so that heat transfer effect gets a promotion, while the stability of the product is greatly improved.
Gas selects octafluorocyclobutane, and without using SF6, it is because SF6 is a kind of greenhouse gases, it is not selected, to ring
Border is more friendly, and water is easily breakdown under high voltages, thus while the heat dissipation effect of water is more preferable, but also without using.
In the case where electric current is larger, phenomena such as easily producing electric arc etc., or even cause shelf depreciation, inner wall 18 is caused
Irreversible damage, and when fuse unit plays a role under abnormal operating conditions, after fusible link 7 fuses, due to powerful electricity
Fusible link 7 is specially arranged in vacuum chamber 5 by the possible directly gas breakdown of stream so as to form short circuit, is reached by vacuum
The effect to fuse completely.
Fusible link 7 can be burned out under abnormal condition, Circuit Interrupt, can release substantial amounts of heat at this time, due to fusing
Silk 7 is in vacuum chamber 5, and heat exchange means main at this time are radiation heat transfer and heat conduction, but radiation heat transfer is relative to traditional pair
Stream heat exchange and heat-conducting effect are very different, are not enough to completely distribute heat, and since sandwich construction causes heat-conducting effect
It is deteriorated, at this time very easily burns out the component in fuse unit, seriously even produce explosion, therefore ventilation device is set, when
Fusible link 7 fuses under abnormal condition, and fuse 21 and then fuses together, 17 return of resetting spring, pulls striker 16 to poke absolutely
Edge diaphragm seal, since inner and outer air pressure is different, the gas in air cavity 20 is entered in vacuum chamber 5 by venthole 6, the temperature energy of gas
Enough temperature directly changed in vacuum chamber 5 everywhere, while the gas flowed can greatly promote and change as the medium of heat convection
Thermal effect, so as to fundamentally solve vacuum heat dissipation problem.
When fusible link 7 fuses, the fuse 21 of tight state fuses together so that resetting spring 17 acts at once, band
Dynamic striker 16 pokes the insulated enclosure film on venthole 6, and whole process is swift in response, and fully achieves automation, it is not necessary to outer
Disturb on boundary.
Heat transfer and electric conductivity due to fusible link 7 is pretty good, the generally same temperature under abnormal condition, therefore
Can complete moment integrally fuses, and the reaction speed of resetting spring 17 owns far below fusing speed, therefore thoroughly after arc extinguishing
Venthole 6 on insulated enclosure film can just be exposed together so that gas can come in faster speed.
After inner and outer air pressure reaches equality, 6 air inlet of venthole of 12 side of air inlet is closed on, closes on 1 side of gas outlet
6 outlet of venthole, the gas of flowing directly can take heat out of vacuum chamber, complete further heat dissipation.
Embodiment two
The present embodiment is further improved based on embodiment 1, as shown in Figure 1, the fuse unit cylinder is additionally provided with ground connection
End 14, the ground terminal 14 sequentially pass through ground connection copper rod 13 and outlet copper rod 10 are connected with conductive contact finger 11, and ground connection copper rod 13 is connecing
The end face of ground terminal 14 is recessed ground connection wire casing 15.
In use, by setting ground terminal 14 so that fuse unit avoids electric leakage etc. to contact personnel by ground connection
Damage.
Embodiment three
The present embodiment is based on any one of embodiment 1-2 and is further improved, as shown in Figure 1, the air inlet 12 connects
Logical high-pressure pump.
In use, air pressure is higher than atmospheric pressure in air cavity 20, so as to allow the gases at high pressure in air cavity 20 to be formed
A kind of protective layer, one side gases at high pressure effectively can prevent to continue to puncture in vacuum chamber 5 after shelf depreciation breakdown inner wall 18
Outer wall 19, another aspect gases at high pressure can preferably prevent external environment and vacuum chamber 5 impacted.
Example IV
The present embodiment is based on any one of embodiment 1-3 and is further improved, as shown in Figure 1, the outer wall 19 and interior
Wall 18 is made by epoxy resin.
In use, epoxy resins insulation, electric property are superior, can completely sealing and isolation difference in functionality list
Member.
It is the embodiment of the utility model as described above.The utility model is not limited to the above embodiment, anyone
It should learn the structure change made under the enlightenment of the utility model, it is every that there is same or like skill with the utility model
Art scheme, each falls within the scope of protection of the utility model.
Claims (4)
1. a kind of fuse unit of good heat dissipation effect, including fuse unit cylinder, be provided with the fuse unit cylinder end of incoming cables (2) and
Leading-out terminal (9), it is characterised in that：The fuse unit cylinder be followed successively by from outside to inside outer wall (19), air cavity (20), inner wall (18),
Vacuum chamber (5) and fusible link (7), the end of incoming cables (2) connect vacuum chamber (5) by inlet wire copper rod (4), and inlet wire copper rod (4) exists
The end face of end of incoming cables (2) is recessed into wire casing (3)；
Octafluorocyclobutane gas is filled with the air cavity (20)；
The leading-out terminal (9) connects vacuum chamber (5) by outlet copper rod (10), and outlet copper rod (10) is in the end face of leading-out terminal (9)
It is recessed line outlet groove (8)；
The fusible link (7) connects inlet wire copper rod (4) with outlet copper rod (10) in vacuum chamber (5), and fusible link (7) stretching is taut
Tightly, multiple ventilation devices are connected with fusible link (7), the ventilation device includes fuse (21), striker (16) and venthole,
The striker (16) is T-type structure, and striker (16) includes raming, hitting body and hit point, and described ram is fixedly connected with fuse (21),
The fuse (21) is fastened on fusible link (7), and fuse (21) stretching is tight；Ram and connected by resetting spring (17)
Inner wall (18), resetting spring (17) stretching are tight；
It is described to hit on body is vertically set on and rams, hit body and run through resetting spring (17), the point that hits is hit positioned at the other end for hitting body
Point is towards inner wall (18), and it is towards inner wall (18) direction and the descending conical structure of internal diameter to hit point；
Multiple ventholes (6) are additionally provided with inner wall (18), the center of any venthole (6) is ramed in one with adjacent
On bar straight line, and the quantity ramed and the quantity of venthole (6) correspond, covered with insulated enclosure film on venthole (6)；
It is additionally provided with air inlet (12) and gas outlet (1) on the outer wall (19), the air inlet (12) and the gas outlet (1)
Connected with air cavity (20).
A kind of 2. fuse unit of good heat dissipation effect according to claim 1, it is characterised in that：The fuse unit cylinder is also set
Ground terminal (14) is equipped with, the ground terminal (14) sequentially passes through ground connection copper rod (13) and connects outlet copper rod with conductive contact finger (11)
(10), it is grounded copper rod (13) and ground connection wire casing (15) is recessed in the end face of ground terminal (14).
A kind of 3. fuse unit of good heat dissipation effect according to claim 1, it is characterised in that：Air inlet (12) connection
High-pressure pump.
A kind of 4. fuse unit of good heat dissipation effect according to claim 1, it is characterised in that：The outer wall (19) and inner wall
(18) it is made by epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721283485.5U CN207233677U (en) | 2017-09-30 | 2017-09-30 | A kind of fuse unit of good heat dissipation effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721283485.5U CN207233677U (en) | 2017-09-30 | 2017-09-30 | A kind of fuse unit of good heat dissipation effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207233677U true CN207233677U (en) | 2018-04-13 |
Family
ID=61851091
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721283485.5U Active CN207233677U (en) | 2017-09-30 | 2017-09-30 | A kind of fuse unit of good heat dissipation effect |
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| Country | Link |
|---|---|
| CN (1) | CN207233677U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863564A (en) * | 2020-07-09 | 2020-10-30 | 刘兴华 | Fuse tube with long service life |
-
2017
- 2017-09-30 CN CN201721283485.5U patent/CN207233677U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863564A (en) * | 2020-07-09 | 2020-10-30 | 刘兴华 | Fuse tube with long service life |
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