CN216015183U

CN216015183U - Oil-filled circuit breaker

Info

Publication number: CN216015183U
Application number: CN202121929579.1U
Authority: CN
Inventors: 陈灵; 廖平; 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 oil-filled circuit breaker, which comprises a shell, a threaded cover and a wiring end, wherein the threaded cover is sleeved at one end of the shell, the wiring end penetrates through and is fixed between the threaded cover and the shell, a rubber ring is connected to the inner side of the threaded cover, a supporting rod and a spring are fixed to the inner wall of the shell, a heating element and a bimetal elastic sheet are fixed to one end of the supporting rod, and a plurality of hollow rubber balls are movably placed in the shell. The transformer oil is filled in the shell and the threaded cover, and the transformer oil separates electric arcs generated when the conductive plate and the conductive block are separated from air, so that the circuit breaker has extremely strong explosion-proof capacity.

Description

Oil-filled circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to an oil-filled circuit breaker.

Background

The circuit breakers are divided into undervoltage circuit breakers, overload circuit breakers and short-circuit breakers, and the circuit is automatically disconnected under undervoltage, overload and short-circuit conditions to realize the protection effect;

and the circuit breaker among the prior art, the current conducting plate can produce electric arc with the conducting block separation when breaking circuit, and electric arc can't be isolated with the air, does not have the explosion-proof ability, can't be applicable to dangerous places such as gas factory, consequently needs a circuit breaker that explosion-proof ability is strong.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that an electric arc is generated when a conducting plate and a conducting block are separated when a circuit is disconnected, the electric arc cannot be isolated from air, has no explosion-proof capability and cannot be applied to dangerous places such as a gas factory and the like in the prior art, and accordingly an oil-filled circuit breaker is provided.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides an oil charge type circuit breaker, includes shell, screw thread lid, wiring end, the screw thread lid has been cup jointed to the one end of shell, the centre of screw thread lid and shell all runs through and is fixed with the wiring end, and the inboard of screw thread lid is connected with the rubber ring, the inner wall of shell is fixed with bracing piece and spring, the one end of bracing piece is fixed with heating element and bimetal shell fragment, the hollow rubber ball of a plurality of has been placed including the inside activity of shell, the one end opening of wiring end is provided with the fluting, and the screw thread ring has been cup jointed to the one end screw thread of wiring end.

Further preferably, the insulating plate, the current-conducting plate, the conducting block, the ejector pin and the cushion block, the insulating plate is fixed on the inner wall of the shell through the supporting rod, two conducting blocks penetrate through and are fixed in the insulating plate, the ejector pin is bonded in the middle of the insulating plate through the structural adhesive, the cushion block is bonded at one end of the ejector pin through the structural adhesive, and one end of the spring is fixed on the current-conducting plate.

Further preferably, the interior of the housing and the screw cap is filled with unshaped transformer oil, and a rubber ring is arranged between the housing and the screw cap.

Preferably, the terminals are electrically connected to one of the conductive blocks and the conductive plate through wires, and the two conductive blocks are electrically connected to two ends of the heating element through wires.

Further preferably, the heating element is one of a silicon molybdenum rod and a molybdenum wire, and the heating element is spirally and circularly arranged below the bimetallic strip.

Preferably, the ejector rod penetrates through the middle of the insulating plate, the conductive plate abuts against the two conductive blocks, and the bimetallic spring plate is located right below the cushion block.

Further preferably, the conductive blocks are symmetrically arranged on two sides of the ejector rod, the ejector rod is perpendicular to the bottom of the insulating plate, and the two springs are symmetrically arranged on the top of the insulating plate.

The utility model has the beneficial effects that: the inside packing of shell and screw cap has transformer oil, the electric arc that produces when transformer oil separates current conducting plate and conducting block separates with the air, make this circuit breaker have extremely strong explosion-proof ability, generate heat after heating element current overloads, bimetal shell fragment absorbs the heat kickup, bimetal shell fragment is with the cushion, ejector pin and current conducting plate jack-up, make current conducting plate and two conducting block separations, open circuit's electric current, hollow rubber ball can the extrusion deformation, self has elasticity, hollow rubber ball can make the inside of shell and screw cap fill transformer oil all the time, ensure explosion-proof ability.

Drawings

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

FIG. 2 is a schematic view of the overall use of the present invention;

fig. 3 is a schematic view of the structure of the terminal of the present invention.

In the figure: the structure comprises a shell 1, a threaded cover 2, a wiring terminal 3, a rubber ring 4, a threaded ring 5, a support rod 6, a heating element 7, a bimetallic strip 8, an insulating plate 9, a spring 10, a conductive plate 11, a conductive block 12, a push rod 13, a cushion block 14, a hollow rubber ball 15 and a slot 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. 1-3, an oil-filled circuit breaker, including shell 1, screw thread lid 2, wiring end 3, screw thread lid 2 has been cup jointed to the one end of shell 1, screw thread lid 2 and shell 1's centre all run through and are fixed with wiring end 3, screw thread lid 2's inboard is connected with rubber ring 4, shell 1's inner wall is fixed with bracing piece 6 and spring 10, the one end of bracing piece 6 is fixed with heating element 7 and bimetal shell fragment 8, a plurality of hollow rubber ball 15 has been placed including the inside activity of shell 1, the one end opening of wiring end 3 is provided with fluting 16, the one end screw thread of wiring end 3 has cup jointed threaded ring 5.

Preferably, the housing 1 and the screw cap 2 are filled with transformer oil having an indefinite shape, the rubber ring 4 surrounds the housing 1 and the screw cap 2, and the transformer oil separates an arc generated when the conductive plate 11 and the conductive block 12 are separated from air, so that the circuit breaker has an extremely strong explosion-proof capability.

Preferably, the terminals 3 are electrically connected to one of the conductive blocks 12 and the conductive plate 11 through wires, the two conductive blocks 12 are electrically connected to two ends of the heating element 7 through wires, the conductive blocks 12 and the conductive plate 11 are tightly attached to form a current loop, and the conductive plate 11 moves upward to disconnect the circuit, thereby implementing overload protection.

Preferably, the heating element 7 is a silicon-molybdenum rod, the heating element 7 is spirally arranged below the bimetal elastic sheet 8 in a surrounding manner, the heating element 7 generates heat when current is overloaded, the heating element 7 heats the bimetal elastic sheet 8, and the bimetal elastic sheet 8 deforms to disconnect a circuit.

In this embodiment, insulating plate 9, current-conducting plate 11, conducting block 12, ejector pin 13 and cushion 14, insulating plate 9 pass through the branch to be fixed at the inner wall of shell 1, run through in the insulating plate 9 and be fixed with two conducting blocks 12, the centre of insulating plate 9 bonds through the structure glue has ejector pin 13, the one end of ejector pin 13 bonds through the structure glue has cushion 14, the one end of spring 10 is fixed on current-conducting plate 11.

Preferably, the ejector rod 13 movably penetrates through the middle of the insulating plate 9, the conductive plate 11 abuts against the two conductive blocks 12, the bimetallic strip 8 is located right below the cushion block 14, and the ejector rod 13 can jack the conductive plate 11 to move upwards, so that the ejector rod 13 is limited by the insulating plate 9, and the conductive plate 11 moves up and down stably.

Preferably, the conductive blocks 12 are symmetrically arranged on two sides of the top rod 13, the top rod 13 is perpendicular to the bottom of the insulating plate 9, the two springs 10 are symmetrically arranged on the top of the insulating plate 9, and the two conductive blocks 12 are connected with the current of the heating element 7 to enable the heating element 7 to be electrified and generate heat in an overload mode.

The rubber ring 4 is used for being tightly attached to the shell 1, so that the shell 1 and the threaded cover 2 are completely sealed, and hydraulic oil in the shell 1 and the threaded cover 2 cannot leak;

the cushion block 14 is positioned between the bimetallic strip 8 and the ejector rod 13, so that the contact area between the bimetallic strip 8 and the ejector rod 13 can be increased;

wherein the terminal 3 is used for connecting the electric wire of the circuit, and the screw ring 5 is used for fixing the electric wire to stabilize the circuit connection.

When the utility model is used, firstly, the circuit is connected with the two terminals 3, the conductor of the electric wire is inserted into the groove 16, then the thread ring 4 is rotated to fix the conductor on the terminals 3, the current flows through the two terminals 3, the conducting plate 11 and the conducting block 12 in sequence, the heating element 7 at the bottom of the two conducting blocks 12 is also connected with the current, when the current is overloaded, the temperature of the heating element 7 rises to heat the bimetal elastic sheet 8, the middle part of the bimetal elastic sheet 8 bends upwards, the cushion block 14, the mandril 13 and the conducting plate 11 are jacked up by the bimetal elastic sheet 8 to separate the conducting plate 11 from the conducting block 12, as shown in the attached figure 1 of the specification, when the circuit is disconnected to realize overload protection, the heating element 7 heats transformer oil, the transformer oil expands to extrude the hollow rubber ball 15, and the hollow rubber ball 15 deforms to ensure that the inside of the shell 1 and the threaded cover 2 is filled with the transformer oil all the time;

during the equipment, put into shell 1 with hollow rubber ball 15, again with in shell 1 and the complete transformer oil that immerses of screw cap 2, with screw cap 2 rotatory installation on shell 1, make rubber ring 4 hug closely on shell 1, shell 1 and screw cap 2 are sealed completely, screw cap 2 can extrude transformer oil, make hollow rubber ball 15 take place deformation, when transformer oil expend with heat and contract with cold, the inside of shell 1 and screw cap 2 can be guaranteed to the elasticity of hollow rubber ball 15 self is filled with transformer oil all the time.

Claims

1. An oil-filled circuit breaker comprises a shell (1), a threaded cover (2) and a wiring end (3), wherein the threaded cover (2) is sleeved at one end of the shell (1), the wiring end (3) penetrates through and is fixed in the middles of the threaded cover (2) and the shell (1), and a rubber ring (4) is connected to the inner side of the threaded cover (2), and the oil-filled circuit breaker is characterized in that a supporting rod (6) and a spring (10) are connected to the inner wall of the shell (1), a heating element (7) and a bimetal elastic sheet (8) are connected to one end of the supporting rod (6), and a plurality of hollow rubber balls (15) are movably placed in the shell (1); an opening at one end of the wiring end (3) is provided with a slot (16), and a threaded ring (5) is sleeved at one end of the wiring end (3) in a threaded manner.

2. The oil-filled circuit breaker according to claim 1, wherein the insulating plate (9), the conductive plate (11), the conductive blocks (12), the ejector pins (13) and the cushion blocks (14) are fixed on the inner wall of the housing (1) through supporting rods, the two conductive blocks (12) are fixed in the insulating plate (9) in a penetrating manner, the ejector pins (13) are bonded in the middle of the insulating plate (9) through structural adhesive, the cushion blocks (14) are bonded at one ends of the ejector pins (13) through the structural adhesive, and one ends of the springs (10) are fixed on the conductive plate (11).

3. The oil-filled circuit breaker according to claim 1, wherein the interior of the housing (1) and the screw cap (2) is filled with the unshaped transformer oil, and the rubber ring (4) is wound between the housing (1) and the screw cap (2).

4. The oil-filled circuit breaker according to claim 1, wherein the terminals (3) are electrically connected to one of the conductive blocks (12) and the conductive plate (11) respectively through wires, and the two conductive blocks (12) are electrically connected to both ends of the heating element (7) respectively through wires.

5. The oil-filled circuit breaker according to claim 1, wherein the heating element (7) is one of a silicon-molybdenum rod and a molybdenum wire, and the heating element (7) is spirally wound under the bimetal elastic sheet (8).

6. The oil-filled circuit breaker according to claim 2, wherein the push rod (13) is movably inserted through the middle of the insulating plate (9), and the conductive plate (11) is pressed against the two conductive blocks (12).

7. The oil-filled circuit breaker according to claim 2, wherein the conductive blocks (12) are symmetrically disposed on both sides of the top bar (13), and the top bar (13) is perpendicular to the bottom of the insulating plate (9).