JPH02197034A - Manual operation device for breaker - Google Patents

Abstract

PURPOSE:To obtain a safe and economic manual operation device by providing a cylindrical spring tube in the inside of an open spring, and mounting a hydraulic jack between the lower part plate provided to stud hung from a plate attached to the upper part of the spring tube and a movable spring receiver. CONSTITUTION:A manual operation device is mounted to the part of an open spring 6. A plate 20, to which a protruded part fitted to the diameter of a spring tube 12 is provided, is attached to the upper side of the tube 12 of the open spring 6. A lower side plate 22 is hung with two or more studs 21 provided on the plate 20. A hydraulic jack 23 is provided between the lower side plate 22 and a spring receiver 16, and moved vertically. The tip of the jack 23 is connected to the spring receiver 16, and the ascending and descending of the jack 23 makes the spring receiver 16 to rize and fall to move the open spring up and down. According to the movement of the spring receiver 16, a lever 18 and also a main lever are rotated, and a three-phase link is actuated in an open or close direction. Thus a safe and economic manual operation device is obtained.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention relates to a manual operating device for a circuit breaker used for inspecting an electric spring operating mechanism of a circuit breaker (prior art). In recent years, the trend of increasing power demand and concentration of power consumption in cities has become stronger year by year. In addition, the supply of electricity that meets this demand must be highly reliable and economical.
Power transmission systems are becoming more complex and larger in capacity. on the other hand,
There is a need to reduce the number of substations due to the lack of space for substations in cities.

Furthermore, 60kV class circuit breakers installed in urban areas,
For reasons such as noise countermeasures, electric springs are increasingly being used as a drive method instead of using air as an operation source. However, circuit breakers need to be inspected periodically to ensure long-term reliability.

During inspection, it is necessary to perform slow manual operation and check the operation after inspection.

A conventional manual operating device will be explained with reference to FIGS. 3, 4, and 5. In FIG. 3, an operating force is transmitted from a spring mechanism in the mechanism Ml, which will be described later, to the three-phase connecting links 4, and the circuit breakers 25 of each phase are opened and closed by the operating force. The main lever 2 of the spring mechanism shown in FIG. 5 is connected to the blocking part via a link 3 and a three-phase connecting link 4. The electric spring mechanism has a closing spring 5 and an opening spring 6, and the closing spring 5 of the electric spring is energized by a motor 7 through a speed reducer 8.

The circuit closing spring 5 is released by the circuit closing command, and the main lever 2 is rotated via the cam 9 to move the link 3 and the three-phase connecting link 4 to the circuit closing side. Due to stiffness, the cutoff section is closed by operating force of the three-phase link 4 shown in FIG.

At the same time as the circuit breaker is closed, the opening spring 6 is energized via the main lever 2. When the opening spring 6 is energized, the cam 9 and the main lever 2 are separated, so when the opening command is given, the opening spring is released, the main lever 2 is rotated in the opposite direction, and the link 3 and the three-phase connecting link 4 are The circuit was opened through the circuit.

The manual operating device is usually attached to the open end of the three-phase link 4 as shown in FIG. That is, three-phase link 4
A manual handle 9 is attached to the end of the machine with a pin 10, and the manual handle 9 is rotatably attached to a plate 11 for manual attachment. The mounting plate II is firmly fixed to a frame or the like. By rotating this manual handle 9, the three-phase link 4 is operated in the opening or closing direction, and a slow operation is performed manually.

(Problem to be solved by the invention) However, unlike the operation method such as pneumatic operation, it cannot be operated manually by eliminating the operating force, and in order to operate it, it is necessary to resist the opening spring 6 through a three-phase link. requires a certain amount of force. Therefore, in order to strengthen the mounting plate etc. to match the spring force,
The plate becomes thicker and the number of parts to which bolts etc. are attached increases, making it uneconomical.

Also, in normal operation, not all operating force is applied to the three-phase link, but on the contrary, it is operated manually against the spring load, so
All the operating force is applied to the three-phase link, and measures such as increasing the plate thickness are required to strengthen the three-phase link. For this reason, the weight of the link increases, and in order to obtain the required speed, it is necessary to increase the operating force, which requires countermeasures, which is uneconomical.

The object of the present invention is to provide a manual operating device for a circuit breaker which suppresses the accumulated force and releasing force of the opening spring during manual operation so as not to transmit it to other parts, and allows slow manual operation during inspection. It is.

[Structure of the invention]

(Means for Solving the Problems) A manual operation device for a circuit breaker of the present invention stores energy in a closing spring by the driving force of an electric motor, closes the circuit breaker by releasing the energy in the closing spring, and closes the circuit breaker by releasing the energy in the closing spring. In the spring mechanism that stores energy, a cylindrical spring tube is provided inside the opening spring,
A lower plate is attached to the multiple studs hanging down from the plate attached to the upper part of the spring tube, and a circuit is opened between the spring receiver fixed to the upper part of the spring receiver and the spring receiver movably provided at the lower part of the spring tube. The present invention is characterized in that a spring is provided, and a hydraulic jack is provided between the movable spring bearing and a lower plate provided on the stud.

(Function) In the present invention, the force when the opening spring is loaded and released is internally processed by the action of the stud, the upper and lower spring receivers, and the hydraulic jack, so it does not affect other mechanical parts. Power is transmitted efficiently.

(Embodiment) The present invention will be explained below with reference to the embodiment shown in FIGS. 1 and 2. Although most of the operating device is the same as the operating device shown in the figure, and only the opening spring 6 has been improved, this opening spring 6 will be explained, and the remaining parts will be given the same reference numerals as in Figures 3 to 5. The explanation will be omitted.

In FIGS. 1 and 2, the opening spring 6 of the spring mechanism according to the present invention has a spring tube 12 built inside the spring. The upper portion of this spring tube 12 is rotatably supported between frames 13 and 14 of the electric spring mechanism shown in FIG. Spring tube 12
As shown in FIG. 2, there is a slit 15, and a movable spring receiver 16 is attached to this slit 15. Also, at the top of the spring tube 12.

There is a fixed spring receiver 17, between which an opening spring 6 is provided. The movable spring receiver 16 is connected to a lever 18 by a pin 19, and this lever 18 is connected to the spring #! shown in FIG. It is connected to the main lever 2 of the & structure via a link. Therefore, when the main lever 2 rotates and operates the cutoff part, the lever 18 also rotates and the movable spring receiver 16
will be raised and lowered.

A manual operating device is attached to the opening spring 6 as shown in FIG. On the upper side of the spring tube 12 of the opening spring 6, there is a spring tube 12.
A plate 20 provided with a convex portion that matches the warp is attached. A lower plate 22 is suspended by two or more studs 21 provided on the plate 20, and a hydraulic jack 23 is provided between the lower plate 22 and the spring receiver 16 to move it up and down. The tip of the hydraulic jack 23 is connected to the spring receiver 16. By moving the hydraulic jack 23 up and down, the spring receiver 16 also moves up and down, thereby moving the opening spring 6 up and down. This movement of the spring receiver 16 rotates the lever 18, which in turn rotates the main lever 2, allowing the three-phase link 4 to operate in the opening or closing direction.

As a result, the force against the spring load tends to push the lower plate 22 downward via the hydraulic jack 23.

Since this force pulls the upper plate 20 downward via the stud 21, it pushes the spring cylinder 12 downward. On the other hand, the reaction force applied from the hydraulic jack 23 to the spring receiver 46 pushes the upper spring receiver 17 upward via the opening spring 6. For this reason, the stiff tube I2 is pushed upward by the opening spring 6, canceling the force transmitted from the previous stud 21 and preventing the force from being transmitted to the outside.

Therefore, only the vertical movement of the spring receivers 16, 17 is transmitted and the link is operated. This eliminates the need to strengthen links other than the spring tube 12, and the spring tube 12 has sufficient strength since it originally supports the spring. Furthermore, since the force is not transmitted to the outside, the pedestal and links to which the spring mechanism is attached are not deformed. Additionally, the force is handled internally, making it a safe and economical manual operating device.

〔Effect of the invention〕

As described above, in the present invention, the force of accumulating and releasing the force of the opening spring during manual operation can be processed within the opening spring part, so it does not affect other parts and acts directly on the spring. This allows for efficient transmission of force, which is safe and economical, and allows manual operations to be performed slowly during inspections.

[Brief explanation of the drawing]

1 and 2 are a cross-sectional view and a perspective view showing the opening spring portion used in the circuit breaker manual operation device of the present invention, and FIG.
The figure is a side view showing the three-phase sink mechanism of a general circuit breaker.
This figure is a perspective view showing a conventional manual operating device, and FIG. 5 is a perspective view showing a conventional spring mechanism. 1.Mechanism box 2.Main lever 3.Link 4.3-phase link 5.Closing spring
6... Opening spring 7... Motor 8...
Reducer 9...Manual handle 10...Bin 11...
・Mounting plate 12...Spring cylinder 13, 14...Frame 15...Slit 16, 17...Spring receiver
18...Lever 19...Bin 20...
・Board 2 work...Stud 23...Hydraulic jack 22...Board agent Patent attorney Noriyuki Chika Ken Yudo Daishimaru Ken

Claims (1)

[Claims] In a spring mechanism that stores energy in a closing spring by the driving force of an electric motor, closes a circuit breaker by releasing the energy from the closing spring, and stores energy in an opening spring, a cylindrical spring tube is provided inside the opening spring. The lower plate is attached to multiple studs hanging from the plate attached to the upper part of the spring tube, and the spring receiver is fixed to the upper part of the spring tube and the spring receiver is movably installed at the lower part of the spring tube. A manual operating device for a circuit breaker, characterized in that a circuit opening spring is provided in the circuit breaker, and a hydraulic jack is provided between the movable spring holder and a lower plate provided in the stud.