JPS6224915Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement in the fluid operation mechanism of a cutter or disconnector.

As is well known, there are various means for causing the closing or disconnecting action of the shield breaker. One of these means is a means for controlling the operating mechanism using a fluid such as compressed air. Hereinafter, the principle of a conventional example using this operating mechanism will be described with reference to FIGS. 1A, B, and C when operating with air. In Fig. 1 A, B, and C, 1 is a cylinder, 2 is a piston, 3 is a rod, 4 is a movable contact, and 5 is a fixed contact.
C in the figure shows the disconnected state. In this conventional air operating mechanism, in order to maintain the closed state of the breaker (FIG. 1A), the inside of the cylinder 1 must be constantly filled with a compressed air generator (not shown), and When a natural disaster such as a power outage, typhoon, or earthquake occurs and the compressed air generator becomes inoperable, the air pressure charged in cylinder 1 decreases, making it difficult to maintain the above-mentioned closed state. There is. Furthermore, during assembly, installation, maintenance and inspection of the shield breaker, there is work to insert the shield breaker and adjust the condition of the shield breaker. During this adjustment work, it is necessary to slowly turn on and turn off the heat cutter, but this operation is difficult with conventional pneumatic operating devices.

This invention eliminates the above-mentioned drawbacks, eliminates the need for a constant supply of operating fluid after the breaker is turned on, and makes adjustment work easier by allowing slow input, slow shutoff, and slow shutoff. The purpose of the present invention is to provide a fluid operation mechanism for disconnectors and disconnectors.

Hereinafter, a case where an embodiment of this invention is applied to air operation will be described with reference to the drawings.

In Figure 2 A, B to Figure 5 A, B, 11
12 is a cylinder, and 12 is a piston that is fitted into the cylinder 11 in a sliding manner. An operating rod 13 (not shown) connected to a movable contact of a disconnector is fixed to the piston 12. This operating rod 13
A locking notch 13a is formed at a predetermined location. 14 is a locking body storage part shown in FIGS. 4A and B,
This storage section 14 is fixedly installed on the upper part of the cylinder 11. A through hole 15 for the operating rod 13 is formed in the center of the storage portion 14, and a substantially rectangular recess 16 is provided around the through hole 15. A locking body 17 shown in FIGS. 5A and 5B is movably fitted into this recess 16. A cutout groove 19 is formed in a predetermined portion of the recess 16 in which the locking body 17 accommodates the protrusion 18 . A manual release pin 2 is attached to the protrusion 18.
0 is fixed. This manual release pin 20 is fitted into a through hole 21 formed in the storage section 14.
22 is a locking spring, and this spring 22
is disposed within the recess 23 of the storage section 14. 2
4 is a blind plug. Reference numeral 25 denotes a return supply pipe, and this pipe 25 is provided at an air supply port 26 formed on the side of the storage section 14 opposite to the recess 23. 27
is a ventilation hole, and this ventilation hole 27 is an air inlet for rapidly lowering the piston 12. 28 is an input air supply pipe, and this pipe 28 is connected to cylinder 1.
1 is connected to an air supply port 29 bored at the bottom of the main body.
30 is a lid body, and 31 is a tightening bolt.

Next, the operation of the above embodiment will be described. Now, when the breaker is in the breaker state, the piston 12 is located at the bottom of the cylinder 11 as shown in FIG. 2B. In this state, the input air supply pipe 2
When air is supplied through 8, the piston 12 is pushed up and reaches the position of FIG. 3B. Then, since the locking body 17 is always pressed rightward in the drawing by the spring 22, when the piston 12 pushes up, the locking body 17 is engaged with the locking notch 13a of the operating rod 13. This state is shown in FIG. 3B, and at this time, the squeegee and disconnector are in the closed state. When the locking body 17 moves to the right in the drawing, the manual release pin 20 fixed to the protrusion 18 is projected from the through hole 21 of the storage portion 14 . On the other hand, in order to release the engagement, air is blown toward the locking body 17 from the return air supply pipe 25, and the locking body 17 moves to the left in FIG. 3B. Therefore, the engagement between the locking body 17 and the operating rod 13 is released.
The operating rod 13 begins to descend, but at this time air is blown toward the piston 12 from the vent hole 27, so the piston 12 is rapidly descended. This ensures that the current between the contacts is cut off. Note that the above operations are performed after the closing and disconnection of the disconnector are properly adjusted, but testing of the closing and disconnection of the disconnector (for example, adjustment of three-phase batch input, etc.) ), it is necessary to manually operate the operating rod 13. In this case, proceed as follows.

First, in order to make the slow injection, the air inside the cylinder 11 is exhausted, and then the operating rod 13 is lifted manually, for example, to the position shown in FIG. 3B. Then, since the locking body 17 is constantly pressed in the right direction in the figure by the spring 22,
The locking notch 13a of the operating rod 13 is shown in FIG. 31B.
When the locking body 17 reaches the position of the locking notch 1
3a. This completes the slow injection. When the operating rod 13 is locked as shown in FIG. 3B, the manual release pin 20 fixed to the protrusion 18 of the locking body 17 is projected from the storage portion 14.

Therefore, to release the engagement, the manual release pin 20 is pushed into the through hole 21, and the locking body 17 is placed in the position shown in FIGS. 2A and 2B. Therefore, the engagement between the operating rod 13 and the locking body 17 is released, and the operating rod 13 is lowered.

It should be noted that by coloring the portion of the manual release pin 20 that protrudes from the storage portion 14, it is possible to easily identify the shriveled state.

FIG. 6 shows another embodiment of the locking mechanism,
An engaging hole 32 is formed in the operating rod 13, and a locking pin 33 that is engaged with the engaging hole 30 is inserted into the locking body 17.
It was established in

As described above, according to this invention, the operating rod is automatically locked by the locking body when the breaker is turned on, and it is not necessary to constantly supply fluid into the cylinder after the breaker is turned on. Since it is possible to manually release the lock of the operating rod without using fluid, it is easy to assemble the breaker and to make slow-on operations during adjustment, as well as slow-on and breaker operations.

[Brief explanation of the drawing]

In Fig. 1, A to C are schematic configuration diagrams showing the principle of the conventional example, Figs. Diagram A
Figure 2B is a plan view with the lid removed;
Figure 3B is a cross-sectional view taken along the - line in Figure A, Figure 4A and B are a plan view and front view showing the locking body storage section, Figures 5A and B are A plan view and a front view of the locking body, and FIG. 6 is a plan view showing another embodiment of the locking mechanism. 11...Cylinder, 12...Piston, 13...
...Operation rod, 13a...Locking notch, 14...
...Storage part, 15...Through hole, 16...Recessed part, 17
... Locking body, 18 ... Protrusion, 19 ... Notch groove,
20...Manual release pin, 21...Through hole, 22...
... Spring, 23 ... Recess, 24 ... Blind plug, 2
5...Return air supply pipe, 27...Vent hole, 28...
...Input air supply pipe.

Claims (1)

[Scope of utility model registration request] In a device for supplying and discharging fluid in a cylinder, moving a piston, and closing or cutting off a sheath cutter using an operating rod connected to the piston, a locking portion is provided on the outer periphery of the operating rod. , an operating rod locking body that can be engaged with this locking part is housed in a recess of a storage part provided at the top of the cylinder by being constantly pressed in one direction by a spring, and one end is fixed to the locking body. , a manual release body whose other end is guided and projected to the outside of the housing part is provided in the housing part, and a return fluid supply part is provided in the housing part on the opposite side of the spring to sandwich the locking body and communicate with the recessed part, When the shield breaker is closed, the locking body is automatically engaged with the locking part of the operating rod by the spring force, and when the shield is disconnected, the locking body is resisted by the spring force by the fluid from the return fluid supply section. 1. A fluid operating mechanism for a shear cutter, characterized in that the disengagement is performed by moving the sheath cutter, and the manual release body is operated to perform slow charging and shear cutting.