Spring operating mechanism switch driving device and circuit breaker

Abstract

A spring operating mechanism switch driving device comprises a rack, a ratchet wheel transmission assembly and a closing spring energy storage mechanism are connected to the rack, the ratchet wheel transmission assembly is provided with a ratchet wheel shaft, one end of the ratchet wheel transmission assembly is fixedly connected with a ratchet wheel, the ratchet wheel is driven by a motor through a transmission device to rotate, and the lower portion of the ratchet wheel is connected with and drives the closing spring energy storage mechanism to act; the other end of the ratchet shaft is fixedly connected with a cam, and a pressing flange is arranged on the peripheral contour of the cam; one side of the cam is connected with a travel switch assembly, the travel switch assembly is located on the side opposite to the pressing flange, and the cam can be driven by the ratchet shaft to rotate and trigger the travel switch to be closed through the pressing flange. And the power-off state of the spring operating mechanism of the circuit breaker is realized by pressing and closing the cam structure.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage circuit breakers, in particular to a switch driving device with a spring operating mechanism and a circuit breaker. Background Art

[0002] High-voltage circuit breakers (or high-voltage switches) not only cut off or close no-load and load currents in high-voltage circuits, but also, when a system fault occurs, cut off overload and short-circuit currents through relay protection devices. They feature a comprehensive arc-extinguishing structure and sufficient current-interrupting capacity. They can be categorized as oil circuit breakers (high-oil circuit breakers and low-oil circuit breakers), sulfur hexafluoride circuit breakers (SF6 circuit breakers), compressed air circuit breakers, and vacuum circuit breakers. The contact opening and closing action of a circuit breaker is achieved by an operating mechanism. In voltage levels of 126-252kV, spring-operated mechanisms are the preferred operating mechanism due to their fast response.

[0003] Existing circuit breaker spring operating mechanism switch assemblies usually only have power-off and power-on circuit functions, which cannot meet some customer requirements. For example, some customers require energy storage status signal feedback, interlocking with other electrical components, and other reserved functions. Therefore, the switch drive device of the existing spring operating mechanism is redesigned to meet customer needs. Utility Model Content

[0004] In view of the problems and shortcomings in the prior art, the utility model provides a switch drive device with a spring operating mechanism and a circuit breaker.

[0005] The technical solution of this utility model is as follows:

[0006] A spring-operated switch drive device includes a frame, a ratchet transmission assembly, and a closing spring energy storage mechanism connected thereto. The ratchet transmission assembly includes a ratchet shaft, one end of which is fixedly connected to a ratchet. The ratchet shaft is driven to rotate by a motor through a transmission device, and its lower portion is connected to and drives the closing spring energy storage mechanism to operate.

[0007] Specifically, the motor drives the pawl to move through the transmission device, the pawl drives the ratchet to rotate, and the ratchet drives the ratchet shaft to rotate. At the same time, the ratchet rotates and drives the closing spring energy storage mechanism hinged to it to move, causing the spring to compress or extend, thereby realizing energy storage and release.

[0008] The other end of the ratchet shaft is fixedly connected to a cam, and a pressing flange is provided on the outer peripheral contour of the cam; one side of the cam is connected to a travel switch assembly, which has five travel switches arranged in parallel, and the travel switch assembly is located on the side opposite to the pressing flange. The cam can rotate under the drive of the ratchet shaft and trigger the travel switch to close by pressing the flange.

[0009] The five parallel travel switches are used to realize the functions of motor power off, energy storage status signal feedback, spring operating mechanism closing, and interlocking with other electrical components connected to the circuit breaker, while another travel switch is used as a backup component.

[0010] According to a specific embodiment, the pressing flange is inclined with respect to the outer periphery of the cam, so that the cam is in a "," shape. The cam is fixedly connected to the end of the ratchet shaft by a bolt. The travel switch assembly is fixedly connected to the frame by a bracket.

[0011] Furthermore, the bracket is a right-angle piece, including a base plate and a mounting plate that are perpendicular to each other. The base plate is connected to the frame, and the mounting plate is perpendicular to the cam axis and is provided with a mounting hole. The travel switch is fixed on the mounting plate, and its trigger roller passes through the mounting hole toward the outer peripheral contour of the cam.

[0012] According to a specific embodiment, the closing spring energy storage mechanism includes a pull rod and a closing spring. The upper part of the pull rod is hinged to the lower part of the ratchet, and a connecting plate is provided at the lower end. The closing spring is sleeved on the pull rod and its bottom is adjacent to the top surface of the connecting plate.

[0013] The utility model also discloses a circuit breaker, comprising a spring operating mechanism, wherein the spring operating mechanism has the switch driving device mentioned above.

[0014] Driving principle:

[0015] When the motor is energized, the ratchet rotates through the ratchet drive assembly. The pull rod of the closing spring energy storage mechanism pulls the closing spring, compressing the closing spring to store energy. The ratchet rotation simultaneously drives the ratchet shaft and the cam connected to it to rotate. When the closing spring has completed energy storage, the pressing flange of the cam also presses the trigger roller of the travel switch assembly, thereby de-energizing the motor. When the closing electromagnet is energized, the closing electromagnet push rod pushes the closing latch, disengaging the energy storage latch. The compressed closing spring releases energy, driving the ratchet to rotate, driving the ratchet shaft to rotate, and driving the cam to rotate. When the closing spring has completed energy release, the cam continues to rotate clockwise, causing the pressing flange to separate from the trigger roller of the travel switch, releasing the travel switch.

[0016] The beneficial effects of the utility model are:

[0017] A cam is fixedly attached to the other end of the ratchet shaft, with a pressure flange on its outer contour. A travel switch assembly is connected to one side of the cam, located opposite the pressure flange. Driven by the ratchet shaft, the cam rotates, triggering the travel switch to close by pressing the flange, thereby de-energizing the motor and automatically de-energizing the circuit breaker's spring operating mechanism. Five exceptional travel switch assemblies are provided, each used to de-energize the motor, provide energy storage status signal feedback, close the spring operating mechanism, interlock other electrical components connected to the circuit breaker, and serve as a backup element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the embodiment from a first viewing angle;

[0019] Figure 2 is a perspective view of the embodiment from a second viewing angle;

[0020] Figure 3 This is the state diagram of the cam at the initial position;

[0021] Figure 4 This is a state diagram of the cam being in the position of pressing the travel switch assembly; DETAILED DESCRIPTION

[0022] The following will further illustrate the technical means adopted to achieve the predetermined inventive purpose of the present invention in conjunction with the drawings in the embodiments of the present invention.

[0023] See also Figure 1 and Figure 2 As shown, Figure 1 A perspective view of the embodiment from a first viewing angle; Figure 2 It is a stereoscopic diagram from a second viewing angle of the embodiment.

[0024] A spring-operated switch drive device includes a frame, to which a ratchet 22 transmission assembly and a closing spring energy storage mechanism 3 are connected. The ratchet 22 transmission assembly includes a ratchet shaft 21, one end of which is fixedly connected to the ratchet 22. The ratchet 22 is driven to rotate by a motor 1 through a transmission device, and its lower portion is connected to and drives the closing spring energy storage mechanism 3 to operate.

[0025] The other end of the ratchet shaft 21 is fixedly connected to the cam 4, and a pressing flange is provided on the outer peripheral contour of the cam 4; one side of the cam 4 is connected to a travel switch assembly 6, which has five travel switches arranged in parallel, and the travel switch assembly 6 is located on the side opposite to the pressing flange. The cam 4 can rotate under the drive of the ratchet shaft 21 and trigger the travel switch to close by pressing the flange.

[0026] The five parallel travel switches are used to realize the functions of power off of motor 1, energy storage status signal feedback, closing of the spring operating mechanism, and interlocking of other electrical components connected to the circuit breaker, while another travel switch is used as a backup component.

[0027] According to a specific embodiment, the pressing flange is inclined with respect to the outer periphery of the cam 4, so that the cam 4 is in a "," shape. The cam 4 is fixedly connected to the end of the ratchet shaft 21 by bolts. The travel switch assembly 6 is fixedly connected to the frame by a bracket 5.

[0028] Furthermore, the bracket 5 is a right-angle piece, including a base plate and a mounting plate that are perpendicular to each other. The base plate is connected to the frame, and the mounting plate is perpendicular to the axis of the cam 4. A mounting hole is provided on it. The travel switch is fixed on the mounting plate, and the trigger roller of the travel switch passes through the mounting hole toward the outer peripheral contour of the cam 4.

[0029] According to a specific embodiment, the closing spring energy storage mechanism 3 includes a pull rod and a closing spring. The upper part of the pull rod is hinged to the lower part of the ratchet 22, and a connecting plate is provided at the lower end. The closing spring is sleeved on the pull rod and its bottom is adjacent to the top surface of the connecting plate.

[0030] The utility model also discloses a circuit breaker, comprising a spring operating mechanism, wherein the spring operating mechanism has the switch driving device mentioned above.

[0031] Drive principle, see Figure 3 and Figure 4 As shown, Figure 3 This is the state diagram of the cam at the initial position; Figure 4 This is a state diagram of the cam being in the position of pressing the travel switch assembly.

[0032] After the motor 1 is energized, the ratchet 22 is driven to rotate by the ratchet 22 transmission assembly. The pull rod of the closing spring energy storage mechanism 3 pulls the closing spring, compressing the closing spring to store energy. The ratchet 22 rotates while driving the ratchet shaft 21 to rotate and the cam 4 connected to it to rotate. When the closing spring completes energy storage, the pressing flange of the cam 4 also presses the trigger roller of the travel switch assembly 6, thereby de-energizing the motor 1. When the closing electromagnet 7 is energized, the closing electromagnet 7 push rod pushes the closing latch, disengaging the energy storage latch. The compressed closing spring releases energy, driving the ratchet 22 to rotate, driving the ratchet shaft 21 to rotate and driving the cam 4 to rotate. When the closing spring completes energy release, the cam 4 continues to rotate clockwise, causing the pressing flange to separate from the trigger roller of the travel switch, releasing the travel switch.

[0033] The above is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments and examples. Various changes, equivalent substitutions, improvements, etc. made within the scope of knowledge possessed by those skilled in the art without departing from the concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A spring operating mechanism switch driving device, comprising a frame, to which a ratchet transmission assembly (2) and a closing spring energy storage mechanism (3) are connected, wherein the ratchet transmission assembly has a ratchet shaft (21), one end of which is fixedly connected to a ratchet, the ratchet is driven to rotate by a motor (1) via a transmission device, and the lower part of the ratchet is connected to and drives the closing spring energy storage mechanism (3) to operate; It is characterized in that The other end of the ratchet shaft (21) is fixedly connected to a cam (4), and a pressing flange is provided on the outer peripheral contour of the cam; one side of the cam (4) is connected to a travel switch assembly (6), which has five travel switches arranged in parallel, and the travel switch assembly (6) is located on the side opposite to the pressing flange. The cam (4) can rotate under the drive of the ratchet shaft (21) and trigger the travel switch assembly (6) to close by pressing the flange.

2. The driving device according to claim 1, characterized in that: The pressing flange and the outer periphery of the cam (4) are arranged obliquely, so that the cam (4) is in the shape of a "",.

3. The driving device according to claim 1, characterized in that: The cam (4) is fixedly connected to the end of the ratchet shaft (21) by means of bolts.

4. The driving device according to claim 1, characterized in that: The travel switch assembly (6) is fixedly connected to the frame via a bracket (5).

5. The driving device according to claim 4, characterized in that: The bracket (5) is a right-angle piece, comprising a base plate and a mounting plate which are perpendicular to each other, the base plate being connected to the frame, the mounting plate being perpendicular to the axis of the cam (4) and having a mounting hole thereon, the travel switch being fixed on the mounting plate, and its trigger roller passing through the mounting hole toward the outer peripheral contour of the cam (4).

6. The driving device according to claim 1, characterized in that: The closing spring energy storage mechanism (3) comprises a pull rod and a closing spring. The upper part of the pull rod is hinged to the lower part of the ratchet wheel, and a connecting plate is provided at the lower end. The closing spring is sleeved on the pull rod and its bottom is adjacent to the top surface of the connecting plate.

7. A circuit breaker, characterized in that: It comprises a spring operating mechanism, and the spring operating mechanism has the switch driving device according to any one of claims 1-6.

Images