JP2511018Y2 - Mechanism box for circuit breaker - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a rectangular parallelepiped circuit breaker mechanism box that houses an operating mechanism of a power breaker and control / monitoring system components. Yes, especially regarding technical improvements to facilitate inspection and replacement work.

(Prior Art) In recent years, the demand for electric power has increased remarkably, the capacity of power transmission equipment has increased, and the system has become complicated. In addition, it is clear that electric power is an indispensable energy particularly in modern life, and in the event of a power failure, its social impact is enormous and extremely serious.

In such an important power transmission system, various types of protective devices are used, but the device that bears a particularly heavy responsibility among them is a circuit breaker. The circuit breaker plays an important role in interrupting an abnormal current in the event of an accident, switching the system, and switching the system during inspection to prevent such an accident.

Conventionally, as an operating mechanism for such a circuit breaker, there are an air pressure operating mechanism, a hydraulic operating mechanism, an electric spring operating mechanism, and the like. In the case of an air pressure operation mechanism, an air tank that stores compressed air, a control block that controls the inflow of this air, and in the case of a hydraulic operation mechanism, a pump that generates pressure oil, an accumulator that stores it, and pressure oil. A valve mechanism to be controlled, and in the case of an electric spring operating mechanism, a spring as a power source, an electric motor for storing the spring, and a cam / catch mechanism for transmitting the operation are required.
Conventionally, these operating mechanisms are usually housed in a mechanism box attached to a circuit breaker together with a meter for monitoring pressure, switches, coils for controlling operation, relays, switches and the like.

By the way, in the unlikely event that a failure occurs in the above operating mechanism, the circuit breaker may become inoperable and may cause enormous damage to the system, so maintenance and inspection thereof is very important. In addition, when a failure occurs, it is important to quickly remove the cause, restore it, and shorten the power failure time as much as possible.

FIG. 3 shows the internal structure of such a breaker mechanism box. In FIG. 3, the operating mechanism 1 is fixed on the floor surface 2 of the mechanism box, and the instrument plate 3 on which the pressure gauge 5, switches, and relays are attached is the upper surface 4 of the mechanism box and the floor surface 2. It is supported and fixed to the top and bottom respectively. FIG. 4 is a view showing the outer appearance of the mechanism box of FIG. In FIG. 4, a mechanism box is provided with a monitoring window 6 for reading a meter such as a pressure gauge 5, and a door 7 for internal inspection is provided in three directions of a left side surface, a front surface, and a right side surface. 9 are provided.

(Problems to be Solved by the Invention) By the way, in the mechanism box shown in FIGS. 3 and 4, the three-way doors 7 to
9 will be opened. In this case, since the upper surface 4 cannot be opened, it becomes very difficult to replace a heavy object by a crane, a pulley, etc., and it is necessary to rely on human power, which causes a problem of requiring a lot of time and labor. In particular, since the operating mechanism is heavy in weight, it is impossible to work, and there is a disadvantage that the circuit breaker must be finally moved to a place having a certain level of equipment.
On the other hand, there are parts that can be inspected and replaced only from the upper surface 4 and the floor surface 2 side, so the work in this case is also difficult, and similarly, a lot of time and labor are required.

As described above, requiring a great amount of time for inspection / replacement work is contrary to the social demand for shortening the inspection time and the recovery time in order to fulfill the role of the circuit breaker.

The purpose of the present invention is to solve the above-mentioned problems of the prior art, to eliminate unnecessary space, to facilitate inspection and replacement work, to shorten work time, and to minimize power failure time. It is an object of the present invention to provide an excellent breaker mechanism box that can sufficiently meet social demands.

[Structure of the Invention] (Means for Solving the Problem) The present invention covers a mechanism box, a back surface to which a plurality of components of an operation mechanism and a control / monitoring system are collectively attached, and a plurality of components of a control / monitoring system. And an integral cover which is composed of five faces and which is vertically removable from the back face, and at least an opening is provided on a face facing the back face of the integral cover,
A mechanical box for a circuit breaker in which this opening is closed by a door that can be opened and closed.

(Operation) In the present invention, by removing the integrated cover that covers the five sides other than the back side of the mechanism box, the five sides other than the back side can be opened at the same time, so all the parts attached to the back side can be easily Can be inspected and replaced. Also, the cover can be attached and detached using the opening and closing space of the door.

(Embodiment) An embodiment of the breaker mechanism box according to the present invention will be specifically described below with reference to FIGS. 1 and 2. In addition,
The same parts as those of the prior art shown in FIGS. 3 and 4 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 1, in the mechanism box of this embodiment, the operating mechanism 1 and the instrument panel 3 are collectively attached to the back surface 10 of the mechanism box. Here, the back surface 10 of the mechanism box is welded or bolted in the circuit breaker direction. The other five faces of the mechanism box are made into an integrated cover 11 composed of five faces, and are attached to the back face 10 of the mechanism box so as to be vertically removable.

Further, FIG. 2 is an external view of the mechanism box of the present embodiment, in which the cover 11 is provided with a monitoring window 6 for reading a meter such as the pressure gauge 5, and the left side, the front, and the right side. Doors 7 to 9 for internal inspection are provided in the three directions of the surface, respectively.

In the present embodiment having the above-mentioned configuration, the procedure for inspecting the inside of the mechanism box is as follows.

First, as in the conventional case, the meters can be easily monitored without looking at the mechanism box by touching the inside through the front monitoring window 6. In addition, simple internal inspection / replacement of small parts can be performed in the same manner as before by opening the doors 7-9.

Next, when exchanging heavy objects such as the operating mechanism, by moving the cover 11 from the rear face 10 of the mechanism box in a direction perpendicular to the rear face 10 and removing it, all five faces other than the rear face are completely removed. Since it is opened to the outside, the lifting work by a crane or pulley, which was difficult in the past, becomes easy, and the replacement work time can be greatly shortened. In addition, since the top and bottom sides can be opened in this way, it is easy to replace consumables and lubricate parts that were previously difficult to visually inspect and replace. it can. Further, since the cover 11 can be attached / detached using the open space of the door 8, a useless space for attachment / detachment is unnecessary.

The present invention is not limited to the above-mentioned embodiment, and the arrangement structure of the operation mechanism 1 and the instrument panel 3 may be, for example, left and right reversed or arranged vertically. Also, regarding the configuration of the integrated cover, the number, shape, and location of the open parts can be appropriately selected according to the arrangement of a plurality of parts of the control / monitor system. For example, only one open part is required. A configuration may be provided. Further, the structure of attaching and detaching the integral cover to the back surface can be selected as appropriate, and for example, bolt fastening can be considered.

[Effects of the Invention] As described above, in the present invention, since the integrated cover having five surfaces is configured to be detachable from the back in the vertical direction, the opening / closing space of the door installed on the surface facing the back is provided. You can use it to remove the cover from the back,
It is possible to easily inspect the inside of the mechanical box by removing the cover without specially securing a space for attaching and detaching the cover. Also, since no unnecessary space is required between multiple parts and the cover, it can be used for small circuit breakers. A mechanical box can be provided.

[Brief description of drawings]

1 and 2 are views showing an embodiment of a mechanism box for circuit breaker according to the present invention. FIG. 1 is an exploded perspective view showing a state in which a cover is removed from the back of the mechanism box, and FIG. 2 is a cover. FIG. 3 and FIG. 4 are views showing the external appearance of the state in which the circuit breaker is attached. FIG. 3 is a perspective view showing the inside, and FIG. 4 is a perspective view showing the external appearance. Is. 1 ... Operating mechanism, 2 ... Floor of mechanism box, 3 ... Instrument panel,
4 ... Top surface of mechanism box, 5 ... Pressure system, 6 ... Monitoring window, 7
~ 9 ... Door, 10 ... Rear of mechanism box, 11 ... Integrated cover.

Claims (1)

(57) [Scope of utility model registration request] 1. A rectangular parallelepiped circuit breaker mechanism box for accommodating an operating mechanism of an electric power circuit breaker and a plurality of control / monitoring system components, wherein the mechanism box is composed of a plurality of operating mechanism and control / monitoring system components. And a back surface that is attached to the control / monitoring system, and an integral cover that is composed of five surfaces that cover a plurality of parts of the control / monitoring system and that is vertically detachable from the rear surface, and at least faces the back surface of the integral cover. A mechanical box for a circuit breaker, characterized in that an opening is provided on the surface to be closed, and the opening is closed by a door that can be opened and closed.