CN216015195U

CN216015195U - Circuit breaker with adjustable overcurrent

Info

Publication number: CN216015195U
Application number: CN202121928805.4U
Authority: CN
Inventors: 陈灵; 陈长胜; 徐军; 彭涛
Original assignee: Jiangxi Taorui Automation Equipment Co ltd
Current assignee: Jiangxi Taorui Automation Equipment Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-03-11
Anticipated expiration: 2031-08-17

Abstract

The utility model provides an overload current adjustable circuit breaker, which comprises a shell, wherein the shell is formed by splicing two identical square shells, a rubber ring is embedded and bonded at the top of the shell, an insulating cylinder is movably penetrated through the middle of the rubber ring, two symmetrical conductive blocks are embedded and arranged at the bottom of the insulating cylinder, one ends of the conductive blocks are connected with conductive balls, the other ends of the conductive blocks are fixedly provided with wires, and one side of the shell is connected with an insulating shell. The expansion degree of mercury is in direct proportion to the temperature, the current overload is in direct proportion to the temperature of the heating element, and the metal elastic sheet is extruded by mercury to deform, so that the height of the top of the metal elastic sheet is in direct proportion to the current overload degree, the metal elastic sheet jacks up the metal rod to separate the metal rod from the two conductive blocks, a power supply is disconnected, the insulating cylinder drives the two conductive blocks to move up and down, the overload current can be adjusted according to requirements, and the mercury-free metal-based elastic sheet has the advantages of wide application range and safety and convenience in use.

Description

Circuit breaker with adjustable overcurrent

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with adjustable overload current.

Background

The circuit breaker is used for protecting a circuit, and when the circuit is overloaded, a heating element in the circuit breaker is overloaded and heats, so that a bimetallic strip nearby the heating element is bent to jack an interface up to break the circuit, and the overload protection effect is achieved;

in the circuit breaker in the prior art, the current is cut off due to the fact that the heating element is overloaded, the setting value of the overload current cannot be adjusted, the magnitude of the overload current cannot be adjusted, the circuit of the circuit breaker is frequently cut off, each electric appliance in the circuit is frequently powered off, and the electric appliance is damaged, so that the circuit breaker with the adjustable overload current is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that in the prior art, the current is cut off due to the fact that a heating element is overloaded, the setting value of the overload current cannot be adjusted, the magnitude of the overload current cannot be adjusted, the circuit of a circuit breaker is frequently cut off, each electric appliance in the circuit is frequently powered off, and the electric appliances are damaged, so that the circuit breaker with the adjustable overload current is provided.

In order to achieve the purpose, the utility model adopts the following technical scheme: the breaker with the adjustable overload current comprises a shell, wherein the shell is formed by splicing two identical square shells, a rubber ring is embedded and bonded at the top of the shell, an insulating cylinder movably penetrates through the middle of the rubber ring, two symmetrical conductive blocks are embedded and arranged at the bottom of the insulating cylinder, one ends of the conductive blocks are connected with conductive balls, and the other ends of the conductive blocks are fixedly provided with leads;

one side of the shell is connected with an insulating shell, two conductive plates and an insulating plate are fixed on the inner wall of the insulating shell, two screws penetrate through the middle threads of the insulating plate, and the two conductive plates are respectively positioned under the two screws.

Further preferred, expansion assembly includes the butt joint shell, cup joints shell, conducting rod, metal shrapnel and heating element, the inner wall of shell is fixed with the butt joint shell, the top nested bonding of butt joint shell has the cup joint shell, the both ends of cup jointing shell and butt joint shell all run through and are fixed with the conducting rod, and the one end and the wire of conducting rod connect, the inner wall bonding of cup jointing shell has the metal shrapnel, the top of metal shrapnel is fixed with consecutive cushion, plastic pole and metal pole, wherein the plastic pole is connected in the centre of connecting at cushion and metal pole, the metal pole activity embedding is in the bottom of insulating cylinder, be connected with heating element between two conducting rods respectively.

Preferably, the butt joint shell and the sleeving shell are filled with mercury with irregular shapes, a notch is formed in the top opening of the sleeving shell, and the metal elastic sheet covers the notch of the sleeving shell.

Preferably, the heating element is spiral, is located inside the butt-joint shell and the socket-joint shell, and can be any one of a silicon-molybdenum rod, a silicon-carbon rod, a molybdenum wire and an electric heating wire.

Preferably, the metal elastic sheet is curved, the metal elastic sheet is positioned under the plastic rod and the metal rod, and the conductive ball is tightly attached to the surface of the metal rod or the plastic rod.

Preferably, the heating element, the two conductive rods, the two conductive blocks, the plastic rod, the two conductive balls and the two conductive plates are connected in series through wires, and the three wires are respectively connected to one end of the two conductive blocks, one end of the two conductive rods and the two conductive plates.

Preferably, the surface of the heating element is provided with a high-temperature-resistant insulating coating, the insulating cylinder is sleeved with the plastic rod, and the two conductive plates are respectively connected with two different wires.

Further preferably, the conductive block is perpendicular to the insulating cylinder, the conductive ball is movably embedded in the conductive block, and the size and the shape of the metal rod and the plastic rod are kept consistent.

The utility model has the beneficial effects that: the inflation degree and the temperature of mercury are directly proportional, the electric current transships directly proportional and heating element's temperature directly proportional, metal shrapnel is extruded by mercury and takes place deformation, so the height at metal shrapnel top and electric current overload degree directly proportional, metal shrapnel upwards with the metal pole jack-up, make metal pole and two conducting block separation, the power failure, the insulating cylinder drives two conducting blocks and reciprocates, can adjust overcurrent's size according to the demand, and the use is extensive, convenient to use's advantage has.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic cross-sectional view of the present invention as a whole.

Fig. 3 is an enlarged view of the utility model at a in fig. 2.

Fig. 4 is an enlarged view of the utility model at B in fig. 2.

In the figure: the device comprises a shell 1, a rubber ring 2, a butt joint shell 3, an insulating shell 4, an insulating cylinder 5, a sleeving shell 6, a conductive rod 7, a metal elastic sheet 8, a cushion block 9, a plastic rod 10, a metal rod 11, a conductive block 12, a conductive ball 13, a lead 14, an insulating plate 15, a conductive plate 16, a screw 17 and a heating element 18.

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 breaker with adjustable overcurrent, including shell 1, shell 1 is formed by two same square shells concatenation, the top embedding of shell 1 bonds there is rubber ring 2, the middle activity of rubber ring 2 runs through insulating cylinder 5, the bottom embedding of insulating cylinder 5 is provided with two conducting blocks 12 of symmetry, the one end of conducting block 12 is connected with electrically conductive ball 13, the other end of conducting block 12 is fixed with wire 14, one side of shell 1 is connected with insulating shell 4, the inner wall of insulating shell 4 is fixed with two conducting plates 16 and insulating board 15, the middle screw thread of insulating board 15 runs through two screws 17, wherein two conducting plates 16 are located two screws 17 directly below respectively.

Preferably, the heating element 18, the two conductive rods 7, the two conductive blocks 12, the plastic rod 10, the two conductive balls 13 and the two conductive plates 16 are connected in series through the wires 14, the three wires 14 are respectively connected to one end of the two conductive blocks 12, one end of the two conductive rods 7 and the two conductive plates 16, the two conductive blocks 12 form a current loop, the conductive balls 13 are abutted against the metal rod 11, so that the two conductive blocks 12 can form a current loop, and the conductive balls 13 are used for reducing. Friction between the conductive block 12 and the metal rod 11.

Preferably, the surface of the heating element 18 is provided with a high-temperature-resistant insulating coating, the insulating cylinder 5 is sleeved with the plastic rod 10, two conducting plates 16 are respectively connected with two different conducting wires, after the current of the heating element 18 is overloaded, the temperature rises to heat mercury, and the mercury expands to extrude the metal elastic sheet 8 to deform, so that the metal rod 11 moves upwards and is separated from the conducting rod 12, and overload protection is realized.

Preferably, the conductive block 12 is perpendicular to the insulating cylinder 5, the conductive ball 13 is movably embedded in the conductive block 12, the size and the shape of the metal rod 11 and the plastic rod 10 are kept consistent, the metal rod 11 and the plastic rod 10 can move up and down synchronously, and the plastic rod 10 is inserted into the insulating cylinder 5 to be in contact with the two conductive blocks 12, so that the two conductive blocks 12 cannot form a current loop.

In this embodiment, the expansion assembly includes butt joint shell 3, cup joint shell 6, conducting rod 7, metal shrapnel 8 and heating element 18, the inner wall of shell 1 is fixed with butt joint shell 3, the top nested bonding of butt joint shell 3 has cup joint shell 6, the both ends of cup joint shell 6 and butt joint shell 3 all run through and are fixed with conducting rod 7, and conducting rod 7's one end and wire 14 are connected, the inner wall of cup joint shell 6 bonds metal shrapnel 8, the top of metal shrapnel 8 is fixed with consecutive cushion 9, plastic rod 10 and metal rod 11, wherein plastic rod 10 connects in the centre of connecting at cushion 9 and metal rod 11, metal rod 11 activity embedding is in the bottom of insulating cylinder 5, be connected with heating element 18 between two conducting rods 7 respectively.

Preferably, butt joint shell 3 and the inside of cup jointing shell 6 are filled with the mercury of indefinite shape, and the open-top of cup jointing shell 6 is provided with the breach, and metal shrapnel 8 covers the breach of cup jointing shell 6, and the degree of expansion and the temperature of mercury are directly proportional, and the current overload is directly proportional and heating element 18's temperature, and metal shrapnel 8 is extruded by mercury and takes place deformation, so the height at metal shrapnel 8 top is directly proportional with the current overload degree.

Preferably, the heating element 18 is spiral, the heating element 18 is located inside the butt-joint shell 3 and the butt-joint shell 6, the heating element 18 can be any one of a silicon-molybdenum rod, a silicon-carbon rod, a molybdenum wire and an electric heating wire, after the current of the heating element 18 is overloaded, the temperature is increased to heat mercury, so that the mercury expands to extrude the metal elastic sheet 8 to jack the plastic rod 10, and the current overload protection is realized.

Preferably, the metal elastic sheet 8 is curved, the metal elastic sheet 8 is located right below the plastic rod 10 and the metal rod 11, the conductive ball 13 is tightly attached to the surface of the metal rod 11 or the plastic rod 10, and the conductive ball 13 rolls on the surface of the metal rod 11 or the plastic rod 10, so that the friction force between the conductive block 12 and the metal rod 11 can be reduced.

The insulating coating on the heating element 18 can prevent current from entering the mercury, and the insulating coating can resist high temperature and conduct heat to heat the mercury.

Wherein, the screw 17 can move up and down in the insulating plate 15 by rotating, and the screw 17 fixes the electric wire on the conductive plate 16, which is convenient for the wiring work of the equipment.

Wherein, the sleeve shell 6 and the butt joint shell 3 are matched to lock mercury, so that the mercury can only extrude the metal elastic sheet 8 after expanding.

In the utility model, when in use, a conductor of a circuit wire is placed on the conductive plate 16, then the screw 17 is rotated to be abutted against the conductor of the wire, so that the conductor of the wire is tightly attached and fixed on the conductive plate 16, and the wiring work is completed, the circuit is connected through the wire, the circuit flows through the heating element 18, the two conductive rods 7, the two conductive blocks 12, the plastic rod 10, the two conductive balls 13, the two conductive plates 16 and the three leads 14 to form a current loop, when the current exceeds the setting value of the heating element 18, the temperature of the heating element 18 rises to heat mercury, the volume of the mercury expands along with the rise of the temperature, the mercury extrudes the metal elastic sheet 8 to deform the metal elastic sheet, the top of the metal elastic sheet 8 jacks up the cushion block 9, the plastic rod 10 and the metal rod 11 to separate from the two conductive balls 13, the current is cut off, the current overload protection is realized, the temperature of the heating element 18 drops after the power is cut off, the temperature of the mercury is reduced, the volume is shrunk, the metal rod 11 moves downwards and contacts with the two conductive balls 13 to switch on the current, and the current is automatically switched on;

during adjustment, the metal rod 11 and the two conductive balls 13 can be separated only by moving the insulating cylinder 5 up and down and moving the insulating cylinder 5 upwards to increase the temperature of mercury, so that the current during circuit breaking is increased, otherwise, when the temperature of mercury rises to be lower, the metal rod 11 and the two conductive balls 13 can be separated, so that short circuit is broken when overload current is smaller, and overload current adjustment is realized.

Claims

1. The utility model provides a circuit breaker with adjustable overcurrent, includes shell (1), shell (1) is formed by the concatenation of two the same square casings, the top of shell (1) is equipped with rubber ring (2), the middle activity of rubber ring (2) is run through and is had insulating cylinder (5), the bottom of insulating cylinder (5) is equipped with conducting block (12) of two symmetries, the one end of conducting block (12) is equipped with electrically conductive ball (13), the other end of conducting block (12) is connected with wire (14), a serial communication port, one side of shell (1) is connected with insulating casing (4), the inner wall of insulating casing (4) is equipped with two conducting plates (16) and insulating board (15), and the middle screw thread of insulating board (15) runs through has two screws (17).

2. The circuit breaker with the adjustable overcurrent current according to claim 1, wherein the expansion assembly comprises a butt joint shell (3), a butt joint shell (6), a conductive rod (7), a metal elastic sheet (8) and a heating element (18), the butt joint shell (3) is fixed on the inner wall of the outer shell (1), the butt joint shell (6) is nested and bonded on the top of the butt joint shell (3), the conductive rod (7) penetrates through and is fixed at both ends of the butt joint shell (3) and the sleeve joint shell (6), the metal elastic sheet (8) is bonded on the inner wall of the sleeve joint shell (6), a cushion block (9), a plastic rod (10) and a metal rod (11) which are sequentially connected are fixed on the top of the metal elastic sheet (8), and the heating element (18) is connected between the two conductive rods (7) respectively.

3. An overcurrent adjustable circuit breaker as claimed in claim 2, characterized in that the interior of the docking housing (3) and the socket housing (6) is filled with mercury of indefinite shape, the top opening of the socket housing (6) being provided with a gap.

4. An overcurrent regulatable circuit breaker as claimed in claim 2, characterized in that the heating element (18) is of helical form, the heating element (18) being located inside the docking cradle (3) and the docking cradle (6).

5. The circuit breaker with adjustable overload current according to claim 2, wherein the metal dome (8) is curved, and the conductive ball (13) is tightly attached to the surface of the metal rod (11) or the plastic rod (10).

6. An overcurrent adjustable circuit breaker as claimed in claim 2, characterized in that the heating element (18), the two conducting rods (7), the two conducting blocks (12), the plastic rod (10), the two conducting balls (13) and the two conducting plates (16) are connected in series by means of a wire (14).

7. An overcurrent regulatable circuit breaker as claimed in claim 6, characterized in that the surface of the heating element (18) is provided with a high-temperature-resistant insulating coating, and two different conductors are connected to the two conducting plates (16).

8. An overcurrent adjustable circuit breaker as claimed in claim 2, characterized in that the conductive block (12) is perpendicular to the insulating cylinder (5), and the metal rod (11) and the plastic rod (10) are of uniform size and shape.