CN111223724A - Quick-response direct-current fuse - Google Patents
Quick-response direct-current fuse Download PDFInfo
- Publication number
- CN111223724A CN111223724A CN202010025308.7A CN202010025308A CN111223724A CN 111223724 A CN111223724 A CN 111223724A CN 202010025308 A CN202010025308 A CN 202010025308A CN 111223724 A CN111223724 A CN 111223724A
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- CN
- China
- Prior art keywords
- fixed
- electric connecting
- electric
- fuse
- bulb
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- 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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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/121—Protection of release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/68—Power reset mechanisms actuated by electromagnet
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuses (AREA)
Abstract
The invention discloses a quick-response direct current fuse which comprises a shell, wherein a load resistor, a first electric connecting post and a second electric connecting post are fixed on the inner wall of the shell, a photoresistor is fixed on the side wall of the shell, two connecting springs are fixed at the upper end of the photoresistor, an electric connecting rod is fixed at the upper ends of the two connecting springs, a bulb is connected with one end, close to the electric connecting rod, of the two electric connecting rods, and one end, far away from the bulb, of the two electric connecting rods is abutted to the first electric connecting post and the second electric connecting post respectively. Has the advantages that: the magnetic force through the electro-magnet attracts the power connection pole and makes the external circuit break, and whole process can not cause the damage to the line connection spare for the life of whole device is guaranteed, and need not repair the fuse after transshipping, need not change the fuse, makes the very big reduction of use cost of whole device.
Description
Technical Field
The invention relates to the technical field of direct current fuses, in particular to a direct current fuse with quick response.
Background
The fuse is an electric appliance which fuses a melt by heat generated by the fuse when the current exceeds a specified value and disconnects a circuit; in an electric power system, in order to prevent the damage of a line caused by excessive current in the electric power system, a fuse is generally required.
The current fuses mainly comprise disposable fuses and recoverable fuses; once the existing disposable fuse is blown, the whole fuse needs to be replaced, so that the existing disposable fuse is very inconvenient, is very inconvenient to replace manually and has certain potential safety hazard; the current recoverable fuse is mainly in the form of a bimetallic strip thermal relay, an on-off component of the recoverable fuse is composed of bimetallic strips with different thermal deformation coefficients, when the current is too high, the bimetallic strips are disconnected due to deformation and contact is carried out until the bimetallic strips are cooled and then connected, but when an external circuit is short-circuited, short-circuit faults are not easy to check, long processing time is needed, and if the current is quickly recovered, short circuit is caused again, so that the circuit is continuously damaged;
and no matter the fuse is disposable fuse or recoverable fuse, all utilize heat to realize the broken circuit, but the production of heat itself just needs certain time, makes the response speed of fuse limited, still can cause certain threat to the circuit.
Disclosure of Invention
The invention aims to solve the problem of low response speed of a fuse in the prior art, and provides a direct current fuse with quick response.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a respond rapid direct current fuse, includes the shell, the inner wall of shell is fixed with load resistance, first electric post and the second connects the electric post, the lateral wall of shell is fixed with photo resistance, photo resistance's upper end is fixed with two connecting spring, two connecting spring's upper end all is fixed with an electric pole, two the one end that electric pole is close to each other is connected with the bulb jointly, two the one end that electric pole kept away from the bulb offsets with first electric post and the second connection post respectively, the top of shell is fixed with electro-magnet and condenser, the lateral wall of shell runs through the manual groove of seting up two symmetries and setting, two the inside in manual groove all is equipped with manual reset mechanism.
In foretell quick direct current fuse of response, manual reset mechanism is including fixing the reset spring on manual inslot wall, the one end that reset spring is close to the bulb is fixed with the slider with manual inslot wall sliding connection, the one end that the slider is close to the bulb is connected with the baffle through the torsional spring rotation.
In foretell quick direct current fuse of response, photo resistance, electro-magnet and load resistance pass through the wire and connect formation closed circuit, the condenser passes through wire and electro-magnet parallel access circuit, load resistance one end is passed through the wire and is connected with first electric connection post, the load resistance other end and external circuit connection, the second electric connection post is kept away from the one end of first electric connection post and is passed through the wire and be connected with external circuit.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the first electric connecting pole and the second electric connecting pole are connected together through the two electric connecting poles, so that an external circuit is kept smooth, when the current of the external circuit is increased, the electromagnet attracts the electric connecting poles to separate from the first electric connecting pole and the second electric connecting pole, so that the external circuit is disconnected, the damage of excessive current to a power circuit is avoided, and the power circuit is effectively protected;
2. in the invention, when an external circuit is overloaded, the brightness of a bulb is obviously changed, so that the magnetic force of the electromagnet is obviously increased, the electric pole moves upwards under the action of the magnetic force, the external circuit is disconnected, the capacitor supplies power to the electromagnet, the electromagnet keeps attraction to the electric pole in the discharging process of the capacitor, the external circuit keeps a disconnected state within a certain time, and a worker can process the overloaded electric appliance within a sufficient time;
3. according to the invention, the magnetic force of the electromagnet attracts the electric connecting rod to disconnect the external circuit, so that the whole process cannot damage the line connecting piece, the service life of the whole device is ensured, the fuse is not required to be repaired after overload, the fuse wire is not required to be replaced, and the use cost of the whole device is greatly reduced;
4. according to the invention, when an external circuit is in a short circuit, the current in the circuit is remarkably increased, so that the brightness of a bulb is remarkably improved, the resistance value of the photosensitive resistor is remarkably reduced, the magnetic force of the electromagnet is remarkably increased, the electric connecting rod has enough power to cross the baffle, the baffle blocks the electric connecting rod, the electric connecting rod cannot be automatically reset, secondary damage caused by power restoration after the short circuit is avoided, after the short circuit condition is processed, the baffle can be shifted by pushing the sliding block, the electric connecting rod can be reset, the power supply is restored again, and the great harm caused by the short circuit is effectively eliminated.
Drawings
FIG. 1 is a schematic structural diagram of a fast-response DC fuse according to the present invention;
FIG. 2 is a schematic diagram of a structure of a slider portion of a fast response DC fuse in accordance with the present invention;
fig. 3 is a schematic diagram of a load resistor part connecting circuit.
In the figure: the device comprises a shell 1, a load resistor 2, a first electric connecting post 3, a second electric connecting post 4, a photoresistor 5, a connecting spring 6, an electric connecting rod 7, a bulb 8, an electromagnet 9, a capacitor 10, a manual groove 11, a return spring 12, a sliding block 13 and a baffle 14.
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.
Examples
Referring to fig. 1-3, a quick response direct current fuse comprises a housing 1, a load resistor 2, a first electric connecting post 3 and a second electric connecting post 4 are fixed on the inner wall of the housing 1, a photo-resistor 5 is fixed on the side wall of the housing 1, the photo-resistor 5 has a smaller resistance value when the external light intensity is larger and has a larger resistance value when the external light is weaker, two connecting springs 6 are fixed on the upper end of the photo-resistor 5, a connecting rod 7 is fixed on the upper end of each connecting spring 6, a bulb 8 is connected with the end of each connecting rod 7 close to each other, the brightness of the bulb 8 changes to a certain degree when the current changes, the ends of the two connecting rods 7 far away from the bulb 8 abut against the first electric connecting post 3 and the second electric connecting post 4 respectively, an electromagnet 9 and a capacitor 10 are fixed on the top of the housing 1, two symmetrically arranged manual grooves 11 are formed on the side wall of the housing 1, and manual reset mechanisms are arranged inside the two manual grooves 11.
Manual canceling release mechanical system is including fixing reset spring 12 on 11 inner walls of manual groove, reset spring 12 is close to bulb 8's one end and is fixed with slider 13 with 11 inner wall sliding connection in manual groove, slider 13 is close to bulb 8's one end and is connected with baffle 14 through the torsional spring rotation, baffle 14 is located electric pole 7 directly over, play the hindrance effect to butt joint pole 7, accessible pulling slider 13 makes baffle 14 aversion and then no longer play the hindrance effect to butt joint pole 7.
The photosensitive resistor 5, the electromagnet 9 and the load resistor 2 are connected through wires to form a closed loop, the capacitor 10 is connected with the electromagnet 9 in parallel through the wires to be connected into a circuit, when an external circuit is normally powered on, the capacitor 10 is charged, after the external circuit is disconnected, the capacitor 10 supplies power to the electromagnet 9 to enable the electromagnet 9 to keep magnetic force, one end of the load resistor 2 is connected with the first electric connecting post 3 through the wires, the other end of the load resistor 2 is connected with the external circuit, and one end, far away from the first electric connecting post 3, of the second electric connecting post 4 is connected with the external circuit through the wires.
In the invention, when the circuit is normally powered, the two electric connecting rods 7 connect the first electric connecting rod 3 with the second electric connecting rod 4, so that the whole circuit is in a closed state, the bulb 8 is also in an electric quantity state when being powered, but the current in the circuit is small, the brightness of the bulb 8 is dark, the resistance value of the photosensitive resistor 5 is large, the current passing through the electromagnet 9 is small, the magnetic force generated by the electromagnet 9 is small, the attraction of the electromagnet 9 to the electric connecting rod 7 is small, the on-off of the circuit cannot be influenced, and meanwhile, the capacitor 10 is continuously charged until the capacitor 10 is saturated when the capacitor 10 is not saturated;
when an external circuit is overloaded, the current in the circuit is increased obviously, so that the brightness of the bulb 8 is improved obviously, the resistance value of the photoresistor 5 is reduced obviously, the current flowing through the electromagnet 9 is increased obviously, the magnetic force of the electromagnet 9 is changed obviously, the electromagnet 9 attracts the electric connecting rod 7 by enough magnetic force, the electric connecting rod 7 is separated from the first electric connecting post 3 and the second electric connecting post 4 under the action of the magnetic force, but the magnetic force is limited, so that the electric connecting rod 7 cannot be blocked by the baffle 14 and cannot directly push the baffle 14 to rotate;
after the electric pole 7 moves upwards, the whole external circuit is disconnected, the fully charged capacitor 10 discharges and supplies power to the electromagnet 9, so that the electromagnet 9 still has magnetic force, the electromagnet 9 continuously attracts the electric pole 7, the external circuit keeps a short-circuit state, the overload electric appliance is pulled down within enough time for a worker, after the overload electric appliance is processed, the electromagnet 9 is not powered on any more and does not generate a magnetic field when the electric energy of the capacitor 10 is released completely, and the electric pole 7 is reset under the action of the elastic force of the connecting spring 6 in the state, so that the first electric pole 3 and the second electric pole 4 are reconnected, and the external circuit is normally supplied with power;
when the external circuit is in a short circuit condition, the current in the circuit is obviously increased, so that the brightness of the bulb 8 is obviously improved, the resistance value of the photosensitive resistor 5 is obviously reduced, the current flowing through the electromagnet 9 is obviously increased, thereby the magnetic force of the electromagnet 9 is instantly and obviously lifted, the electric connecting rod 7 carries the bulb 8 to move upwards under the action of the magnetic force and has enough power to push the baffle plate 14 to rotate, and then the electric connecting rod 7 passes over the baffle 14, so that the lower end of the electric connecting rod 7 is blocked by the baffle 14, and when the electric connecting rod 7 cannot rotate the baffle plate 14 only by the gravity and the elastic force of the connecting spring 6, therefore, once the short circuit occurs, the electric connecting rod 7 can not automatically return to the original position, and the secondary short circuit after the power supply is restored is avoided, and under the condition, the external circuit is continuously powered off, so that the overload is distinguished, and a worker can timely handle the short-circuit condition;
after the short-circuit condition is processed, a worker can manually push the sliding block 13 to drive the baffle plates 14 to move, so that the two baffle plates 14 are separated from the contact with the electric connecting rod 7, the bottom of the electric connecting rod 7 is not blocked and is reset under the action of the connecting spring 6 and the gravity of the connecting spring, and the communication of an external circuit is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. The utility model provides a quick response's direct current fuse, includes shell (1), its characterized in that, the inner wall of shell (1) is fixed with load resistance (2), first electric pole (3) and second electric pole (4), the lateral wall of shell (1) is fixed with photo resistance (5), the upper end of photo resistance (5) is fixed with two connecting spring (6), two the upper end of connecting spring (6) all is fixed with one and connects electric pole (7), two the one end that connects electric pole (7) and be close to each other is connected with bulb (8) jointly, two the one end that bulb (8) were kept away from to electric pole (7) offsets with first electric pole (3) and second electric pole (4) respectively, the top of shell (1) is fixed with electro-magnet (9) and condenser (10), the lateral wall of shell (1) runs through sets up two manual grooves (11) that the symmetry set up, and manual reset mechanisms are arranged in the two manual grooves (11).
2. A rapid response dc fuse as claimed in claim 1, characterized in that the manual reset mechanism comprises a reset spring (12) fixed on the inner wall of the manual groove (11), a slide block (13) slidably connected with the inner wall of the manual groove (11) is fixed at one end of the reset spring (12) close to the bulb (8), and a baffle (14) is rotatably connected at one end of the slide block (13) close to the bulb (8) through a torsion spring.
3. A rapid response dc fuse as defined in claim 1, wherein the light dependent resistor (5), the electromagnet (9) and the load resistor (2) are connected by wires to form a closed circuit, the capacitor (10) is connected in parallel with the electromagnet (9) by wires to form a circuit, one end of the load resistor (2) is connected with the first electric connecting post (3) by wires, the other end of the load resistor (2) is connected with an external circuit, and the end of the second electric connecting post (4) far away from the first electric connecting post (3) is connected with the external circuit by wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010025308.7A CN111223724A (en) | 2020-01-10 | 2020-01-10 | Quick-response direct-current fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010025308.7A CN111223724A (en) | 2020-01-10 | 2020-01-10 | Quick-response direct-current fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111223724A true CN111223724A (en) | 2020-06-02 |
Family
ID=70826779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010025308.7A Withdrawn CN111223724A (en) | 2020-01-10 | 2020-01-10 | Quick-response direct-current fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111223724A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111739769A (en) * | 2020-07-21 | 2020-10-02 | 郭德琼 | Vehicle-mounted direct current fuse |
| CN112018728A (en) * | 2020-08-19 | 2020-12-01 | 乔沙秋竹 | Direct current circuit overheating and overcurrent protection equipment |
| CN112820600A (en) * | 2021-01-05 | 2021-05-18 | 陈炜樑 | Induction type magnetic fuse |
-
2020
- 2020-01-10 CN CN202010025308.7A patent/CN111223724A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111739769A (en) * | 2020-07-21 | 2020-10-02 | 郭德琼 | Vehicle-mounted direct current fuse |
| CN112018728A (en) * | 2020-08-19 | 2020-12-01 | 乔沙秋竹 | Direct current circuit overheating and overcurrent protection equipment |
| CN112018728B (en) * | 2020-08-19 | 2022-11-08 | 国网安徽省电力有限公司池州供电公司 | Direct current circuit overheating and overcurrent protection equipment |
| CN112820600A (en) * | 2021-01-05 | 2021-05-18 | 陈炜樑 | Induction type magnetic fuse |
| CN112820600B (en) * | 2021-01-05 | 2022-12-06 | 国网冀北电力有限公司承德供电公司 | Induction type magnetic fuse |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200602 |