JPS6111867Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a load disconnector that combines a disconnection section and a cutoff section consisting of a horizontal central single-point disconnection switch.
In particular, it has been improved to include an interlock function between the disconnecting section and the interrupting section, and to be structurally simple.

In general, load disconnectors are used in power circuits to switch and close loads, but do not require much breaking capacity, and are particularly used to switch or close regular load currents or overload currents. In such a load disconnector, it is necessary to open and close the load in the order from the cutoff section to the disconnection section for the opening operation, and from the disconnection section to the cutoff section for the closing operation. For this reason, conventional load disconnectors have been proposed that are equipped with an electrical or mechanical interlock device to regulate the order of operation of the disconnection section and the cutoff section. However, it is difficult to avoid structural congestion caused by the provision of this interlock device, and the cost also increases.
Therefore, a load disconnector has already been proposed in which the cut-off part and the disconnection part are operated in a predetermined order of operation in one operation without installing a special interlock device. Since it is being used, it has become mechanically complex.

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide a load disconnector that includes an interlock function between a disconnecting section and a cutoff section and is simple in structure. In this case, we decided to limit the development to one in which the disconnection section consists of a horizontal center single-point disconnector. This is a system in which the blade is supported by a rotary insulator in which the horizontal center single-point cutting device can be rotated, and the blade is opened and closed in a double-door style to load and release the blade. Since there is a slight margin for movement, it is likely that the desired mechanism can be obtained with a simple link mechanism, and the horizontal central single-point disconnect switch is the most widely used type of disconnect switch, along with the horizontal two-point disconnect switch. It is based on points.

The gist of the present invention, which has the above-mentioned technical objectives, is to provide a disconnect section consisting of a horizontal center single-point disconnection device having a first rotary insulator and a second rotary insulator each supporting a blade, and the first rotary insulator and the second rotary insulator. and a cutoff part disposed on the upper part of a third rotary insulator located on the same straight line, and the disconnection part is set by rotation of the first rotary insulator and the second rotary insulator,
Further, in a load disconnector configured to respectively close and open the interrupting portion by rotation of the third rotary insulator, a first lever is fixed to the base of the first rotary insulator, and a first lever is fixed to the base of the second rotary insulator. The second part of the letter
While fixing the lever, the base end of the first lever is aligned with the rotation center axis of the first rotary insulator, and the base end of the first lever is aligned with the rotation center axis of the first rotating insulator,
The dogleg-shaped bent portion of the lever is aligned with the center axis of rotation of the second rotary insulator, while the tip of the first lever is configured such that the blade rotates in a double-door manner as the second rotary insulator rotates. and the tip of one side of the second lever are connected by a first connecting rod, and a third lever similar to the first lever is fixed to the base of the third rotary insulator, thereby controlling the rotation of the third rotary insulator. The tip of the third lever and the tip of the other side of the second lever are connected by a second connecting rod so as to rotate the second rotary insulator, and the disconnecting portion and the blocking portion are closed. Sometimes the other side of said second lever is
A position where the second connecting rod is aligned with a center line that is substantially perpendicular to the straight line connecting the rotary insulator and the third rotary insulator and that passes through the center of rotation of the third lever is aligned in one direction, that is, in the loading direction. While the third lever is positioned slightly beyond the position, as the third rotary insulator rotates in the opening direction, the third lever
When the lever moves from the closing position through the position overlapping on the straight line to a position slightly beyond this position in the opening direction, the blocking part becomes in the open state,
Further, as the third lever rotates in the opening direction, the second
The present invention is characterized in that the disconnecting portion is opened by rotating the first rotary insulator via the second lever, the first connecting rod, and the first lever as the rotary insulator rotates.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the disconnecting section 1 of this embodiment consists of a horizontal central single point disconnecting device. More specifically, a first rotary insulator 3 and a second rotary insulator 3a supporting the blade 7 or the blade 7a are installed on the base 2, and the upper ends of the first rotary insulator 3 and the second rotary insulator 3a are Hinge parts 5, 5a to which terminal blocks 4, 4a are attached are fixed. The blades 7, 7a are fixed to the hinge parts 5, 5a, and contact parts 6 are fixed to the tips of the first rotary insulator 3 and the second rotary insulator 3a, respectively, by rotation in mutually opposite directions. , 6a are brought into contact or separated, thereby closing and opening the terminals. Furthermore, a third rotary insulator 8 is implanted on the base 2 on the same straight line as the first rotary insulator 3 and the second rotary insulator 3a and adjacent to the second rotary insulator 3a, and the third rotary insulator 8 A blocking section 9 is placed on top of the section 8. Then, the third rotary insulator 8 is rotated to close and open the blocking section 9. Further, this cutoff section 9 is electrically connected to the terminal block 4a by a conductor 10. .

Furthermore, as shown in FIG. 2, a first lever 11, a second lever 12, and a third lever 14 are fixed to the bases of the first rotary insulator 3, the second rotary insulator 3a, and the third rotary insulator 8 in this order. be.

As shown in FIG. 3, the base end of the first lever 11 is aligned with the central axis of rotation of the first rotary insulator 3. As shown in FIG. Further, the second lever 12 has a dogleg shape, and its bent portion is aligned with the rotation center axis of the second rotary insulator 3a. Then, the tip of the first lever 11 and the tip of one side 12a of the second lever 12 are connected in a first connection so that the rotation of the second rotary insulator 3a causes the first rotary insulator 3 to rotate in the opposite direction. They are connected by rod 13. In the case of this embodiment, the first lever 11 is attached to one side of the second lever 12 so that the first connecting rod 13 intersects a straight line connecting the first rotary insulator 3 and the second rotary insulator 3a.
The opening operation is completed when the second rotary insulator 3a rotates 90 degrees clockwise from the state when the disconnecting section 1 is closed. Therefore, the blades 7, 7a become parallel when the opening operation is completed. Furthermore, the third lever 14 has the same shape as the first lever 11, and rotates integrally with the third rotary insulator 8, which is rotated by an operating device (not shown), thereby rotating the second rotary insulator 3a. The distal end of the third lever 14 and the distal end of the other side 12b of the second lever 12 are connected by a second connecting rod 15 so as to be movable. When the disconnector 1 and the interrupter 9 are closed, that is, in the state shown in FIG. A position where the center line 14a of the third lever 14 passing through its center of rotation and the second connecting rod 15 overlap in a straight line (this position is indicated by the dotted line 1 in FIG. 3a).
The third lever 14 is located at a position slightly beyond the point (indicated by 6) in the loading direction. In the case of this embodiment, the third rotary insulator 8 is rotated in the counterclockwise direction, which is the opening direction, to open the blocking section 9, so that when the blocking section 9 is turned on (see FIG. (a), the third lever 14 is located at the upper right of the dotted line 16 in the figure. As can be understood from FIG. 3a, if the third lever 14 rotates as the third rotary insulator 8 rotates, the corresponding rotation of the second lever 12 causes the second rotary insulator 3a to rotate. is once rotated counterclockwise, and the first rotary insulator 3 is once rotated clockwise.
is maintained in the closed state. This means that the blades 7 and 7a at the horizontal center single-point cutting path are the first.
This is achieved by paying attention to the feature of the horizontal center single-point cut path section that a predetermined contact state can be maintained at the contact portions 6, 6a even if the rotary insulator 3 and the second rotary insulator 3a deviate slightly from the straight line connecting them. Ru. That is, even if the closed state is maintained in the disconnecting section 1, there is a somewhat wide tolerance range in the position where the blades 7, 7a should be present. Therefore, as described above, the position where the third lever 14 should occupy when the disconnecting section 1 and the blocking section 9 are in the closed state is the position where the second lever 12 is located as the third lever 14 rotates. The blades 7, 7a are at such a position that they remain within the permissible range even when rotated counterclockwise to the maximum. Incidentally, the second lever 12 and the third
If the positional relationship with the lever 14 is set as described above, as the third lever 14 rotates, the blades 7, 7a move into the first rotary insulator 3 and the second rotary insulator 3a.
The third lever 1 deviates the most from the straight line connecting the
This is when the center line 14a of No. 4 overlaps the dotted line 16 (see FIG. 3b). On the other hand, the opening operation of the cutoff part 9 is completed at the latest before the contact parts 6, 6a of the cutoff part 1 are separated. In this embodiment, by rotating the third rotary insulator 8 in the counterclockwise direction, the second
The rotary insulator 3a once rotates counterclockwise, and the blades 7, 7a rotate the first rotary insulator 3 and the second rotary insulator 3a.
The third rotary insulator 8 is deviated downward in the state shown in FIG. The process is completed by the time the blades 7, 7a are aligned again.
That is, the opening operation of the cutoff section 9 is completed in the state shown in FIG. 3c.

The manner in which such a load disconnector is operated from a closed state to an open state will be described in detail with reference to Fig. 3. Fig. 3a shows the closed state of the load disconnector, i.e., the manner in which both the interrupter 9 and the disconnector 1 are in the closed state. In this state,
When the third rotating insulator 8 is rotated counterclockwise by driving an operating device (not shown), the third lever 14
The third rotating insulator 8 rotates counterclockwise integrally with the third rotating insulator 8. In response to this, the second lever 12 also rotates counterclockwise once due to the driving force transmitted via the second connecting rod 15, so that the center line 14a of the third lever 14 and the second connecting rod 15 overlap on a straight line. This state is shown in Figure 3b. At this time, the blades 7, 7a are also maximally displaced in the direction opposite to the opening direction. When the third rotating insulator 8 rotates further counterclockwise, the second lever 12 then rotates clockwise in the opposite direction and returns to its initial state. This state is shown in Figure 3c. At this time, the interrupter 9 is completely open. When the third rotating insulator 8 rotates further counterclockwise from the state shown in Figure 3c, the second lever 12
At the same time, the first lever 11 is rotated counterclockwise via the first connecting rod 13, so that the second rotary insulator 3a rotates clockwise and the first rotary insulator 3 rotates counterclockwise. As a result, the blades 7, 7a are opened like double doors, completing the opening operation of the load disconnector. This state is shown in Figure 3d.

On the other hand, the closing operation of the load disconnector is completely opposite to the opening operation. That is, the third rotary insulator 8 may be rotated clockwise.

As specifically explained above in conjunction with the embodiments, the load disconnector of the present invention forms the disconnection section with a single point disconnection section at the horizontal center, and when the disconnection section is closed, the blade is moved in the opposite direction to the opening direction of the disconnection section. Focusing on the existence of a permissible range for deviation in the opposite direction in which a predetermined contact can be maintained even if the blade is deviated in the opening direction, the blocking part is opened between the rotation of the blade in the opposite direction to the opening direction. Since the link mechanism is used to store the load disconnector, the order of opening and closing required for the load disconnector can be maintained as specified. In other words, it includes an interlock function. Further, since the rotational force is transmitted to the first rotary insulator and the second rotary insulator by a simple link mechanism consisting of a lever and a connecting rod, the load disconnector has this part simplified compared to the conventional one.

[Brief explanation of the drawing]

Figure 1 is a front view showing an embodiment of the present invention, Figure 2 is an enlarged view showing the lower part of Figure 1, the lever and connecting rod, and Figures 3a to 3d are the invention. These are explanatory diagrams for sequentially explaining the operation of the embodiment, in particular, FIG. 3a shows the state when the load disconnector is closed, and FIG. 3d shows the state when the load disconnector is opened. In the drawing, 1 is a disconnection part, 3 is a first rotary insulator, 3a
8 is a third rotary insulator, 9 is a blocking portion, 11 is a first lever, 12 is a second lever, 12
a is one side, 12b is the other side, 13 is the first connecting rod, 14 is the third lever, 14a is the center line,
15 is a second connecting rod.

Claims (1)

[Scope of utility model registration request] A first rotary insulator and a second rotary insulator each supporting a blade.
A disconnecting section consisting of a horizontal center single-point disconnection device having a rotating insulator is combined with a blocking section disposed above a third rotating insulator located on the same straight line as the first rotating insulator and the second rotating insulator. In the load disconnector, the disconnection section is opened and closed by the rotation of the first rotary insulator and the second rotary insulator, and the cutoff section is closed and opened by the rotation of the third rotary insulator, respectively. A first lever is fixed to the base of the first rotary insulator, and a dogleg-shaped second lever is fixed to the base of the second rotary insulator, and the base end of the first lever is connected to the rotation center axis of the first rotary insulator. and the dogleg-shaped bent portion of the second lever is aligned with the center axis of rotation of the second rotary insulator, while the blade is rotated in a double-door manner by rotation of the second rotary insulator. The tip of the first lever and the tip of one side of the second lever are connected by a first connecting rod, and a third lever similar to the first lever is fixed to the base of the third rotary insulator. The tip of the third lever and the tip of the other side of the second lever are connected to a
They are connected by a connecting rod, and furthermore, when the disconnection section and the cutoff section are turned on, the other side of the second lever is connected to the second lever.
The position where the second connecting rod is aligned with the center line that is substantially perpendicular to the straight line connecting the rotary insulator and the third rotary insulator and passes through the center of rotation of the third lever is defined as one direction, that is, the loading direction. The third lever is positioned at a position slightly beyond the closing position, and as the third rotary insulator is rotated in the opening direction, the third lever moves from the closing position to a position where the third lever overlaps the straight line. When the block is moved to a position slightly beyond this position in the opening direction, the blocking portion becomes open, and as the third lever rotates in the opening direction, the second rotary insulator rotates. A load disconnector characterized in that the disconnector is opened by rotating the first rotary insulator via the second lever, the first connecting rod, and the first lever.