CN110853994A

CN110853994A - Repeatedly usable's continuous disconnected formula fuse

Info

Publication number: CN110853994A
Application number: CN201911191328.5A
Authority: CN
Inventors: 曹文保
Original assignee: 曹文保
Current assignee: Pujiang Lihao Electronic Technology Co.,Ltd.
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-02-28
Anticipated expiration: 2039-11-28
Also published as: CN110853994B

Abstract

The invention discloses a reusable connection-disconnection type fuse, which comprises a shell, wherein brackets are correspondingly arranged in two ends of the shell, contact heads are fixedly sleeved in the two brackets, and lead wires extending out of the two ends of the shell are connected to the two contact heads. The shell is internally and correspondingly provided with two conductive contact heads, the two contact heads are integrally connected with heat conducting fins with a heat conducting effect, and the heat conducting fins are placed in a container filled with a chloroform evaporation solution; the conductive block with the conductive performance is installed together with the spring and the guide block by utilizing the piston, the piston rod and the spring in the shell, under the condition that the circuit voltage is overloaded, the chloroform is evaporated to generate gas by utilizing the high-temperature heat-conducting strip, the piston which is stressed to move extrudes the conductive block through the piston rod, and the open circuit state of the conductive block and the contact head which are separated is formed, so that the power-off protection is provided for the overloaded circuit, the conductive block automatically resets after the open circuit, a path circuit is formed, and the manual management is favorably reduced.

Description

Repeatedly usable's continuous disconnected formula fuse

Technical Field

The invention relates to the technical field of circuit application and maintenance, in particular to a reusable continuous fuse protector.

Background

The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The fuse melts 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 disconnected. The fuse in the traditional technology is manufactured by generally referring to the principle, a metal conductor is used as a melt to be connected in series in a circuit, and when overload or short-circuit current passes through the melt, the metal conductor is fused due to self heating, so that the circuit is broken.

Traditional fuse-link formula fuse adopts the copper wire as the fuse-element more, when overcurrent or short circuit take place, fuse-element in the fuse-element can fuse in the very first time, if will make the normal route of circuit, must change fuse-element in the fuse even, under this kind of condition, not only need the manual work to carry out loaded down with trivial details change operation, need disassemble the fuse promptly, certain operation degree of difficulty has, behind the new fuse-element of replacement, still need artifical power transmission to test, certain risk has, it is more troublesome to lack the people of circuit knowledge.

Disclosure of Invention

The invention aims to solve the problems of high cost and complex operation caused by high updating frequency of a fuse in the prior art, and provides a reusable fuse.

In order to achieve the purpose, the invention adopts the following technical scheme:

a reusable fuse protector comprises a shell, wherein two supports are correspondingly arranged in two ends of the shell, contact heads are fixedly sleeved in the two supports, lead wires extending out of two ends of the shell are connected to the two contact heads, a piston tube is fixedly connected in the upper end of the shell between the two contact heads, a piston is sleeved in the piston tube in a sliding manner, a piston rod extending out of the lower end of the piston tube in a sliding manner is fixedly connected to the lower section of the piston, containers are fixedly arranged on two sides of the piston tube, evaporated liquid is filled in the containers, air guide tubes are communicated between the two containers and the piston tube, heat conducting fins fixedly sleeved in the containers are welded on the two contact heads, a groove seat is integrally connected in the lower end of the shell between the two contact heads, two springs are vertically welded in the groove seat, and a conducting block welded with the piston rod and movably abutted against the two contact heads is fixedly supported on the two springs, the inner walls of the two sides of the groove seat are provided with sliding grooves, and two ends of the conductive block are connected with guide blocks which are sleeved in the sliding grooves in a sliding mode.

Preferably, the two contact heads horizontally correspond to each other, and the vertically corresponding piston rod and the conductive block are located between the two contact heads.

Preferably, both ends of the air duct are respectively connected with the upper end of the piston tube and the container.

Preferably, the evaporation liquid is a chloroform solution.

Preferably, the heat conducting sheet is located in a chloroform solution.

Preferably, the two contact heads are correspondingly provided with a clamping groove at one end, which is movably abutted against the two ends of the conductive block.

Compared with the prior art, the invention has the following advantages:

1. the two contact heads are correspondingly and fixedly installed in the insulating shell, the two contact heads are integrally connected with the heat conducting sheet for sensing temperature, and the heat conducting sheet is placed in the container filled with the chloroform evaporated liquid to monitor the temperature of the conductive contact heads, so that the heat conducting sheet generates high-temperature heat when the circuit voltage is overloaded, and the chloroform is evaporated to generate gas.

2. The invention correspondingly arranges piston tubes and operation in the upper and lower ends of the shell of the two contact heads, uses the piston rod and the spring to support the conductive block which can move up and down together, uses the over-high heat to lead the gas generated by decomposing the trichloromethane evaporation liquid to extrude the piston so as to force the lead block which moves down to be separated from the two contact heads, thereby forming the open circuit protection.

3. The conductive block is movably arranged between the two contact heads, after the overload condition of the circuit is finished, gas is reduced under the low-temperature condition, the conductive block is restored to the original position under the elastic supporting action of the spring and is contacted with the contact heads again to form a path circuit, manual operation management can be reduced, and labor-saving and efficient automatic management is formed.

In summary, the two conductive contacts are correspondingly arranged in the shell, the two contact contacts are integrally connected with the heat conducting fins with the heat conducting effect, and the heat conducting fins are placed in the container filled with the chloroform evaporation liquid to monitor the temperature of the conductive contacts; the conductive block with the conductive performance is installed together with the spring and the guide block by utilizing the piston, the piston rod and the spring in the shell, under the condition that the circuit voltage is overloaded, the chloroform is evaporated to generate gas by utilizing the high-temperature heat-conducting strip, the piston which is stressed to move extrudes the conductive block through the piston rod, and the open circuit state of the conductive block and the contact head which are separated is formed, so that the power-off protection is provided for the overloaded circuit, the conductive block automatically resets after the open circuit, a path circuit is formed, and the manual management is favorably reduced.

Drawings

Fig. 1 is a schematic structural diagram of a reusable fuse according to the present invention;

FIG. 2 is an enlarged view of a portion A of a reusable fuse according to the present invention;

FIG. 3 is an enlarged view of a portion B of a reusable fuse according to the present invention;

fig. 4 is a schematic view of a contact structure of a reusable fuse according to the present invention.

In the figure: the device comprises a shell 1, a bracket 2, a contact 3, a lead 4, a piston tube 5, a piston 6, a piston rod 7, a container 8, an air duct 9, a heat conducting sheet 10, a groove seat 11, a spring 12, a conductive block 13, a clamping groove 14, a sliding groove 15 and a guide block 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, a reusable fuse, which comprises a housing 1, the housing 1 can be made of transparent high temperature resistant plastic material, not only having insulation protection function, but also being helpful to observe the whole fuse without disassembling the housing 1, the housing 1 is correspondingly provided with brackets 2 in both ends, and the two brackets 2 are respectively fixedly sleeved with a contact 3, the two contacts 3 are respectively connected with leads 4 extending out of both ends of the housing 1, and a piston tube 5 is fixedly connected in the upper end of the housing 1 between the two contacts 3, a piston 6 is slidably sleeved in the piston tube 5, and the lower section of the piston 6 is fixedly connected with a piston rod 7 extending out of the lower end of the piston tube 5, under the driving action of the piston 6, the piston rod 7 can do telescopic motion in the piston tube 5, both sides of the piston tube 5 are fixedly provided with containers 8, the container 8 is filled with evaporated liquid, the container 8 is a brown sealed bottle to prevent the evaporated liquid from being illuminated, the air guide tubes 9 are communicated between the two containers 8 and the piston tube 5, the two contact heads 3 are welded with heat conducting fins 10 fixedly sleeved in the container 8, the heat conducting fins 10 can be made of metal materials with good heat conducting effect, a groove seat 11 is integrally connected in the lower end of the shell 1 between the two contact heads 3, the opening of the groove seat 11 is vertically upward so as to accommodate the conducting block 13, the groove seat 11 is vertically welded with two springs 12, the two springs 12 are jointly and fixedly supported with a conducting block 13 which is welded with the piston rod 7 and movably abutted against the two contact heads 3, sliding grooves 15 are formed in the inner walls of the two sides of the groove seat 11, two ends of the conducting block 13 are connected with guide blocks 16 which are slidably sleeved in the sliding grooves 15, and the guide blocks 16 support the conducting block 13 to move in the vertical direction, the conductive block 13 is guided and limited, so that the conductive block 13 can be matched and abutted with the two contact heads 3 when moving upwards, and the stability of circuit connection is ensured.

Two contact 3 levels correspond, and perpendicular piston rod 7 and the conducting block 13 that corresponds all are located between two contact 3, and under the drive effect of piston rod 7 and spring 12, conducting block 13 reciprocates to contact or separate with two contact 3.

The both ends of air duct 9 are connected with piston tube 5 upper end and container 8 respectively for the gas that produces by the evaporation of chloroform evaporation liquid can get into piston tube 5 through air duct 9, thereby carries out the extrusion to piston 6.

The evaporation liquid is trichloromethane solution, the heat conducting fin 10 is located in the trichloromethane solution, the boiling point of the trichloromethane evaporation liquid is 61-62 ℃, a large amount of gas can be generated in the evaporation process, and when the temperature of the trichloromethane evaporation liquid is reduced to be below the boiling point, the gas is reduced.

The two contact heads 3 are correspondingly provided with a slot 14 at one end thereof, which is movably abutted against the two ends of the conductive block 13, so as to realize the inosculation connection of the conductive block 13 and the contact heads 3.

The invention can be illustrated by the following operating modes:

referring specifically to FIG. 1, the circuit is in a normal voltage on-state;

when the current voltage passing through the lead 4, the contact 3 and the conductive block 13 is too large, the two contacts 3 rapidly rise their own temperature due to current overload, and transfer high-temperature heat to the heat-conducting sheet 10;

when the temperature of the heat conducting fins 10 reaches 61-62 ℃, the chloroform evaporation liquid in the container 8 is rapidly evaporated, and a large amount of phosgene and hydrogen chloride are generated, wherein the phosgene gas rapidly enters the piston tube 5 through the gas guide tube 9 and extrudes the piston 6;

the stressed piston 6 drives the piston rod 7 to move downwards in the piston tube 5 and pressurize the conductive block 13, the conductive block 13 slides downwards in the sliding groove 15 through the guide block 16 to extrude the two springs 12, and the springs 12 are stressed to contract so as to separate the conductive block 13 from the two contact heads 3 to form open-circuit protection.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a repeatedly usable's continuous type fuse, includes casing (1), its characterized in that, correspond in casing (1) both ends and be provided with support (2), and all fixed cover is equipped with contact head (3) in two support (2), two all be connected with lead wire (4) that extend to outside casing (1) both ends on contact head (3), and be located casing (1) upper end fixedly connected with piston tube (5) between two contact heads (3), sliding sleeve is equipped with piston (6) in piston tube (5), and piston (6) hypomere fixedly connected with slide and extend to piston tube (5) outer piston rod (7) of lower extreme, piston tube (5) both sides all fixedly mounted have container (8), it has the evaporating liquid to fill in container (8), and all communicate between two container (8) and piston tube (5) has air duct (9), and all weld on two contact (3) and fix conducting strip (10) of locating in container (8) of cover, and be located casing (1) lower extreme between two contact (3) interior body coupling has groove seat (11), and perpendicular welding has two springs (12) in groove seat (11), two common fixed stay has conducting block (13) that weld mutually with piston rod (7) and offset with two contact (3) activities on spring (12), spout (15) have been seted up to groove seat (11) both sides inner wall, and conducting block (13) both ends all are connected with guide block (16) that sliding sleeve located in spout (15).

2. A reusable fuse as per claim 1, characterised in that the two contacts (3) correspond horizontally and the vertically corresponding piston rod (7) and conductive block (13) are located between the two contacts (3).

3. A reusable fuse link according to claim 1, characterised in that the ends of the gas tube (9) are connected to the upper end of the piston tube (5) and the container (8), respectively.

4. A reusable fuse as claimed in claim 1, wherein said evaporative liquid is a chloroform solution.

5. A reusable fuse as claimed in claim 4, characterized in that the thermally conductive sheet (10) is in chloroform solution.

6. A reusable fuse as claimed in claim 2, characterised in that one end of each of the two contacts (3) is provided with a corresponding slot (14) which is in movable abutment with the two ends of the conductive block (13).