CN105428115B - A kind of breaker - Google Patents

Abstract

This invention discloses a circuit breaker, including a circuit breaker frame (21). A rotatable shaft (5) is connected to one side of the circuit breaker frame (21). One end of the shaft (5) is connected to a switchgear via a connecting piece (1). The shaft (5) drives the trip shaft (24) to rotate via a pressure rod (7), which in turn pushes the connected holding shaft (16) to rotate and disengage the holding latch (17) to achieve tripping. The circuit breaker is also equipped with an energy storage device. When the holding shaft (16) and the holding latch (17) are engaged and rotate, the energy storage device stores energy. This invention ensures that the circuit breaker is in an open state during maintenance, thus ensuring personnel safety.

Description

a circuit breaker

technical field

The invention relates to a switchgear, in particular to a circuit breaker with an interlocking device.

Background technique

At present, during the use of high-voltage circuit breakers, due to the different types of cabinets and cost considerations, manufacturers often choose some fixed high-voltage circuit breakers. This type of circuit breaker is fixed in the cabinet and does not need to be moved, so the chassis is removed. The car, resulting in the lack of five-proof interlocking, may easily lead to misoperation by the operator and cause property damage or even personal injury or death.

Contents of the invention

The purpose of the present invention is to solve the problems existing in the prior art, and provide a circuit breaker that can ensure that the circuit breaker is in the disconnected state when the staff inspects and repairs, so as to ensure the safety of personnel.

In order to achieve the above object, the technical solution adopted by the present invention is: the provided circuit breaker includes a circuit breaker frame, one side of the circuit breaker frame is connected to a rotatable rotating shaft, and one end of the rotating shaft is connected to the switch cabinet through a connecting piece , the rotating shaft drives the opening shaft to rotate through the pressing rod, and reversely pushes the connected holding shaft to rotate and the holding detent to release to realize the opening; the circuit breaker is also equipped with an energy storage device, the holding shaft and the holding detent When combined and rotated, the energy storage device is driven to store energy.

In order to make the above technical solutions more detailed and specific, the present invention also provides the following further preferred technical solutions to obtain satisfactory practical effects:

The rotating shaft is provided with a pressing plate connected to one end of the pressing rod, the pressing plate rotates through the rotating shaft to press the pressing rod to make it move, and the other end of the pressing rod drives the opening shaft to rotate through the transmission plate.

The opening shaft is connected to the opening piece I, the opening piece II is fixed on the holding shaft, and a rotatable rotating piece is arranged between the opening piece I and the opening piece II.

The rotating piece rotates around the center as a rotating shaft, and the rotating piece is provided with a limiting groove to limit its rotation angle.

The energy storage device includes an energy storage spring, an energy storage shaft, and the energy storage arm is connected to the energy storage spring through the energy storage shaft. The energy storage crank arm makes the energy storage spring in the energy storage state.

A limit plate is provided on the pressure rod, and the downward movement of the pressure rod cooperates with the limit pin arranged on the energy storage and holding shaft below to fix the energy storage and holding shaft so that it cannot move.

The pressing rod is provided with a compression spring which plays a reset role.

The rotating shaft is provided with a micro switch and a position sensor that outputs the rotation angle of the rotating shaft, so as to control the switching of the micro switch to stop the movement when the power is turned off.

The opening shaft, the holding shaft, the energy storage shaft, the energy storage holding shaft and the rotating piece are all fixed on the mechanism stand plate, and the mechanism stand plate is fixed on the circuit breaker frame.

Compared with the prior art, the present invention has the following advantages: when the circuit breaker is overhauled, the circuit breaker can be forcibly disconnected through the transmission pressure plate and pressure bar interlocking device to ensure that the circuit is powered off and personnel are safe; When the line is overhauled, the energy storage arm on the interlock device is used to withstand the energy storage crank arm, so that the closing spring cannot act and the circuit breaker cannot be closed to ensure that the line is powered off; the device is equipped with a micro switch to automatically cut off the power supply, which can It is connected with the control system of the cabinet to play the function of electrical protection.

Description of drawings

The following is a brief description of the content expressed in the accompanying drawings of this specification and the marks in the drawings:

Fig. 1 is a top view of the circuit breaker of the present invention;

Fig. 2 is the right side view of the circuit breaker of the present invention;

Fig. 3 is a left side view of the circuit breaker of the present invention;

Fig. 4 is A-A sectional view of circuit breaker of the present invention;

Fig. 5 is a B-B sectional view of the circuit breaker of the present invention.

Marked in the figure: 1, connecting piece, 2, support plate I, 3, micro switch, 4, pressure plate, 5, rotating shaft, 6, support plate II, 7, pressure rod, 8, limit piece, 9, limit Position pin, 10, fixed bracket, 11, compression spring, 12, transmission plate, 13, opening plate II, 14, rotating plate, 15, opening plate I, 16, holding shaft, 17, holding detent, 18, Energy storage toggle arm, 19, energy storage stopper, 20, energy storage holding shaft, 21, circuit breaker frame, 22, mechanism stand plate, 23, energy storage spring, 24, opening shaft, 25, energy storage shaft.

detailed description

The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

The invention provides such a circuit breaker, which has an interlocking device, which can be used on the circuit breaker to connect it with the matching cabinet to play the role of five-proof interlocking. The circuit breaker, as shown in Figure 1, includes a circuit breaker frame 21, one side of the circuit breaker frame 21 is connected to a rotatable rotating shaft 5, one end of the rotating shaft 5 is connected to the switch cabinet through the connecting piece 1, and the rotating shaft 5 drives the opening through the pressure rod 7 The shaft 24 rotates, and the rotation of the opening shaft 24 reversely pushes the connected holding shaft 16 to rotate, so that the holding shaft 16 and the holding detent 17 are tripped to realize the opening, as shown in Figure 4; capable device. Through the use of the interlocking device, the harm caused by human misoperation is avoided, and at the same time, it meets the national requirements for high-voltage electrical five-proof interlocking, ensuring the safety of electricity use.

In an embodiment of the circuit breaker of the present invention as shown in FIG. 1 , the rotating shaft 5 is rotatably connected to the circuit breaker frame 21 through the support plate I2 and the support plate II6. The rotating shaft 5 is provided with a pressing plate 4 connected to one end of the pressing rod 7. The pressing plate 4 rotates through the rotating shaft 5 and presses the pressing rod 7 to make it move. shown. The pressure plate 4 and the connecting piece 1 are fixed on the rotating shaft 5 with screws, and the micro switch 3 is installed on the support plate I2.

In the present invention, as shown in Figure 2, the opening shaft 24 is connected to the opening piece I15, the opening piece II13 is fixed on the holding shaft 16, and a rotatable rotating piece is arranged between the opening piece I15 and the opening piece II13 14. The rotating piece 14 rotates around the center as a rotating shaft, and the rotating piece 14 is provided with a limiting groove for limiting its rotation angle. The rotating shaft 5 presses the pressure rod 7 through the pressure plate 4 to realize the force conversion, and pushes the opening shaft 24 to rotate. The opening shaft 24 moves the rotating piece 14 through the opening piece I15, and the opening piece II13 at the other end pushes the holding shaft 16 to reverse direction. Rotate and hold the detent 17 to trip to realize forced opening.

In the present invention, as shown in Figure 5, the energy storage device includes an energy storage spring 23, an energy storage shaft 25, and an energy storage arm 18 is connected to the energy storage spring 23 through the energy storage shaft 25, and the energy storage detent 19 is fixed on the energy storage Keep shaft 20 on. When the energy storage shaft 25 rotates, it drives the energy storage spring 23 to store energy. When in the energy storage state, the energy storage detent 19 contacts and blocks the energy storage crank arm 18 to make the energy storage spring 23 carry out continuous energy storage.

The pressing rod 7 can flexibly move up and down through the fixed bracket 10, and the fixed bracket 10 is fixed on the mechanism stand plate 22. When the pressure rod 7 moves downward under the drive of the rotating shaft 5, the pressure rod 7 is provided with a limit piece 8, and the limit piece 8 cooperates with the limit pin 9 located on the energy storage and holding shaft 20 below to limit the position and fix the energy storage. Can keep axle 20 and can't move, make the energy storage detent 19 that is contained in above withstand energy storage crank arm 18 and make energy storage spring 23 can not reset, and circuit breaker can not switch on.

The circuit breaker of the present invention is provided with a compression spring 11 on the pressure rod 7 . The limit plate 8 is fixed on the pressure rod 7, and the limit pin 9 fixed on the energy storage and holding shaft 20 cooperates with the pressure spring 11 to be sleeved on the pressure rod 7 to perform a reset function.

The opening shaft 24, the holding shaft 16, the energy storage shaft 25, the energy storage holding shaft 20 and the rotating piece 14 are all fixed on the mechanism stand plate 22, and the mechanism stand plate 22 is fixed on the circuit breaker frame 21.

In the present invention, the rotating shaft 5 is provided with a micro switch 3 and a position sensor for outputting the rotation angle of the rotating shaft, so as to control the switching of the micro switch to stop the movement when the power is turned off. The connecting piece 1 is connected with the external switch cabinet. When the power is supplied from the outside, the connecting piece 1 rotates to drive the rotating shaft 5 to rotate, and the position sensor outputs the position signal to the controller. When it reaches a certain set position, the micro switch 3 switches the power off and stops the movement to realize the circuit breaker. The purpose of not closing or forcing opening.

Play the role of opening the circuit breaker to disconnect;

In the circuit breaker of the present invention, the pressing rod 7 passes through the fixing bracket 10 and is fixed on the mechanism stand plate 22 , and the limiting piece 8 and the compression spring 11 are arranged on the pressing rod 7 . The transmission plate 12 is connected to the opening shaft 24 , and the rotating piece 14 acts as a bridge connecting the opening shaft 24 and the holding shaft 16 . The limit pin 9 and the energy storage detent 19 are fixed on the energy storage holding shaft 20, and the energy storage shaft 25, the energy storage spring 23, and the energy storage crank arm 18 are connected. When the pressure rod 7 is pressed down, the limit plate 8 cooperates with the limit pin 9 to fix the energy storage detent 19 against the energy storage crank arm 18 so that it cannot be closed; at the same time, the movement of the pressure rod 7 drives the transmission plate 12 to move, Make the opening piece I15 fixed on the opening shaft 24 push the rotating piece 14 to rotate, and reversely push the opening piece II13 to make the holding shaft 16 rotate and the holding detent 17 to trip, which plays the role of opening and the circuit breaker is disconnected.

The circuit breaker of the present invention has a series of transmission interlocking devices, the function of which is to ensure that the circuit breaker must be disconnected during maintenance, so as to ensure the personal safety of maintenance personnel.

The circuit breaker of the present invention has the following characteristics:

1. When the line is overhauled, the circuit breaker can be forcibly disconnected through the transmission interlock device to ensure that the line is powered off and the safety of personnel is ensured.

2. When the line is overhauled, the energy storage arm 19 on the interlocking device withstands the energy storage lever, and the closing spring cannot be operated and the circuit breaker cannot be closed to ensure that the line is powered off.

3. The device is equipped with a micro switch 3 that can automatically cut off the power supply, and can be connected with the control system of the cabinet for electrical protection.

The present invention has been exemplarily described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned manner, as long as various insubstantial improvements or direct application to other occasions are carried out by adopting the method concept and technical solutions of the present invention, All fall within the protection scope of the present invention.

Claims (6)

1. a kind of breaker, including circuit breaker frame (21), it is characterised in that：Circuit breaker frame (21) the side connection can turn Dynamic rotating shaft (5), described rotating shaft (5) one end is connected on switch cubicle by connection sheet (1), and passes through supporting plate I (2) and support Rotatably support is connected in circuit breaker frame (21) plate II (6), and the rotating shaft (5) drives separating brake axle by depression bar (7) (24) rotate, reversely promote the holding shaft (16) being connected to rotate and realize separating brake with keeping sincere sub (17) to thread off；The rotating shaft (5) Provided with the pressing plate (4) for being connected to the depression bar (7) one end, the pressing plate (4) is rotated by the rotating shaft (5) and pushes down depression bar (7) move it, the other end of the depression bar (7) drives the separating brake axle (24) to rotate by driver blade (12)；The breaker On be additionally provided with energy storage device, holding shaft (16) drives energy storage device energy storage when being rotated with keeping sincere sub (17) to fasten；The energy storage Device includes energy accumulation spring (23), energy storage axle (25), energy-storage crank arm (18) and is connected by energy storage axle (25) with energy accumulation spring (23), energy storage Sincere son (19) is fixed in energy storage holding shaft (20), and the energy-storage crank arm (18) is blocked in sincere sub (19) contact of the energy storage makes energy storage Spring (23) is in energy storage state；The depression bar (7) is provided with banking stop (8), and the depression bar (7) moves downward is located at institute with lower section State the spacer pin (9) in energy storage holding shaft (20) and coordinate spacing, fixed energy storage holding shaft (20) akinesia.

2. according to the breaker described in claim 1, it is characterised in that：Separating brake axle (24) the connection separating brake piece I (15), separating brake Piece II (13) is fixed in the holding shaft (16), provided with rotatable rotation between separating brake piece I (15) and separating brake piece II (13) Piece (14).

3. according to the breaker described in claim 2, it is characterised in that：The rotatable lamella (14) is using center as axis of rotation, institute State rotatable lamella (14) and be provided with the stopper slot for limiting its rotational angle.

4. according to the breaker described in claim 1, it is characterised in that：The depression bar (7) is provided with the stage clip played reset role (11)。

5. according to the breaker described in any one of Claims 1-4, it is characterised in that：The rotating shaft (5) is provided with microswitch (3), and output revolving shaft rotational angle position sensor, to control microswitch switching power-off stop motion.

6. according to the breaker described in claim 5, it is characterised in that：The separating brake axle (24), holding shaft (16), energy storage axle (25), energy storage holding shaft (20) and rotatable lamella (14) are each attached on mechanism station plate (22), and mechanism station plate (22) is fixed on On the circuit breaker frame (21).