JPH037846Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an interlock device for stacked stacks and disconnectors, and more particularly to a device for mechanically interlocking upper and lower stacks and disconnectors.

Conventional technology Shiya disconnectors are sometimes used in two stacks. In this case, one of the upper and lower cable disconnectors may be used for regular use, and the other may be connected to the backup line, but in such cases, each cable disconnector is not opened or closed at the same time. You must be careful.

Problems that the invention aims to solve: However, when using an electrical interlock device in the two-tier stacking and disconnectors mentioned above, there is a risk of poor contact or disconnection, and in that case, it is necessary to There was a risk of accidentally opening or closing at the same time. The present invention proposes a mechanical interlock device for stacking and disconnecting devices that does not have these drawbacks.

Means for Solving the Problems That is, the interlock device for stacking and disconnecting according to the present invention rotatably fixes one end side of the link mechanism formed by the first to fourth links. At the same time, the other rotating end is connected to the operation lever of the movable contact of the switch, and the trip hook restricts the movement of the first joint of the link in the escape direction, and the movable iron core of the closing electromagnet controls the movement of the second joint of the link. In a configuration in which the switch is pressed and the upper and lower links of the node are extended to close the switch, and the switches and disconnectors are stacked vertically, each of the upper and lower is provided with a rotation operating shaft that rotates in conjunction with the expansion and contraction of the link and a trip-hook operation shaft that rotates the trip-hook, which rotate in conjunction with the expansion and contraction of the link mechanism of one of the sheaths and disconnectors. The operating shaft for rotation and the operating shaft for the trip hook that rotates the trip hook of the other shear breaker are interlocked and connected via a connecting shaft, so that when one shear breaker is turned on, the operating shaft for rotation and the connecting shaft rotate. The actuating shaft for the trip hook of the other shear breaker is rotated in the direction in which the trip hook is released from the engagement position with the roller.

Therefore, according to the above configuration, when the link mechanism is extended when one of the shear disconnectors is inserted, the link mechanism is extended, so that the link mechanism is extended through the rotation actuating shaft and the connecting shaft that rotate in conjunction with the link. The actuating shaft for the trip hook of the other sheath breaker is rotated, and the trip hook is rotated from the engagement position with the roller in the tripping direction to prevent the other sheath breaker from being inserted.

Embodiments The present invention will be described below with reference to embodiments shown in FIGS. 1 to 5.

Fig. 1 is a perspective view of the interlock device of the present invention, Fig. 2 is a rear view, Fig. 3 is a detailed view of the interlock device as seen from the back, and Figs. 4 and 5 are the cutter operating mechanism. FIG.

First, the operating mechanism of the shingle breaker will be explained with reference to FIGS. 4 and 5.

This operating mechanism consists of a toggle mechanism using a commonly known link. That is, the first link 15, the second link 16, the third link 6, and the fourth link 7 are respectively rotatably connected to form a link mechanism, and the first link 15 of this link mechanism The free end side is rotatably fixed, and the free end side of the fourth link 7 of the link mechanism is connected to an operating rod 8 that opens and closes the contacts of a switch 11 made of a vacuum interrupter. And the first link 1
5 and the second link 16 as the first node, the roller 1 is provided here, and the second link 1
6 and the third link 6, the roller 5 is provided as a second node. In addition, a trip hook 2 is provided near the roller 1, which is the first joint, and is engaged with and removed from the roller 1. During the closing operation of the breaker, the trip hook 2 is engaged and becomes the first joint. The movement of the roller 5 in the escape direction (counterclockwise in FIG. 5) is restricted and serves as a fulcrum for the closing operation.In this state, when the roller 5 is pressed and engaged with the stopper 13, the second link 16 and the third link are closed. 6 expands into a straight line shape and pushes up the fourth link 7 to maintain the closed state.

Thus, FIG. 4 shows the cutter and disconnector in the tripped state, and FIG. 5 shows the closed state. In FIG. 5, roller 1, which serves as a fulcrum for the closing operation, is engaged with trip hook 2. When the coil 3a of the input electromagnet 3 is excited, the movable iron core 4 is attracted, the roller 5 is moved to the left, and the second link 16 in FIG. 5 is rotated counterclockwise. This movement pushes up the third link 6, moves the operating rod 8 upwards via the fourth link 7, and connects the switch 1, which is made up of a vacuum interrupter, via the pressure contact spring 9 and the insulating rod 10.
The movable contact No. 1 is closed to complete the closing. on the other hand,
In the link mechanism, the roller 5 engages with the stopper 13 to form a toggle and maintain the closed state (fifth
figure).

When the trip electromagnet 12 operates in the above-mentioned closed state, the trip hook 2 rotates counterclockwise, and the roller 1
, the first link 15 rotates counterclockwise, and the second link 16 , third link 6 , and operating rod 8 are rapidly rotated by the spring force of the break spring 14 and pressure spring 9. The contact point of the switch 11 is opened. Further, the toggle of the link collapses, and the first link 15 and the trip hook 2 are reversed by the return spring, and the trip hook 2 and the trip hook 1 are turned again.
is engaged and becomes a tripped state. The two-dot chain line in FIG. 4 indicates the tripping free state.

However, when the tripping electromagnet 12 operates during the closing process, the trip hooks 2 and 1 are disengaged, as shown by the two-dot chain line in FIG. Can be pulled out. In other words, if the trip hook 2 is operated to disengage from the roller 1, the link mechanism will not operate to close the movable contact of the switch 11 no matter how the closing electromagnet 3 operates.

The interlock device according to the present embodiment utilizes the operating mechanism using the trip hook 2, that is, the movable contact of one of the switches 11 of the upper and lower stacked two-tiered disconnectors is closed. At this time, the trip hook 2 of the other shear breaker is mechanically interlocked so that it is rotationally displaced to a state where it is free to be tripped.

The interlock mechanism will be explained with reference to FIG. It is suspended horizontally, and the rotating shaft 18 of the upper shredder 17 is connected to the trip-hook operating shaft 19 of the lower shredder 17.
A is connected to the connecting shaft 20, and the lower tier disconnector 1
The rotating operating shaft 18a of No. 7 is operatively connected to the trip-hook operating shaft 19 of the upper sheath cutter 17 via a connecting shaft 20a.

Thus, the rotating operating shafts 18 and 18a rotate in conjunction with the closing operation of the closing electromagnet 3, and transmit this movement as rotation to the other trip hook operating shaft 19, 19a via the connecting shafts 20, 20a.
The trip hooks 2, 2 are rotated in the tripping direction by the rotation of the rotation operating shafts 19, 19a. To explain in order below, the third link 6 and the fourth link 7 are connected to a swing plate 22 that swings about a support shaft 21 (this swing plate 22 is shown in FIGS. 4 and 5). (It also functions as the link 23 shown in FIG. 2, that is, it movably connects the third link 6 and the fourth link 7 within a predetermined range.)
An engagement pin 24 provided at the other end of the swing plate 22
is fitted into an elongated hole 25 of a swing arm 26 fixed to the rotation operating shafts 18, 18a. The rotation operating shafts 18, 18a are supported by a bearing plate 27 fixed to the back surface of the cutter 17. Rotating operating shaft 18,
An operating plate 28 is fixed to the end of 18a, and connecting rods 20, 2 are connected to the operating plate 28 via engagement pins 29.
One end of 0a is connected. Also, connecting rod 2
The other ends of the trip hooks 0 and 20a are connected via engagement pins 32 to actuating plates 31 fixed to the ends of the trip hook actuating shafts 19 and 19a to which the trip hooks 2 are attached. This trip hook operating shaft 19, 19
The a-shaft is pivotally supported by a bearing plate 30 fixed to the back surface of the disconnector 17.

Next, to explain the operation, in FIG. 1, the movable contact of the switch 11 of the upper tier breaker 17 is closed, and the movable contact of the switch 11 of the lower tier breaker 17 is opened. . At this time, the upper trip hook 2 is engaged with the roller 1, and the lower trip hook 2 is rotating in the direction of disengaging from the roller 1. Even if the closing electromagnet 3 of 17 is erroneously operated, the movable contact of the switch 11 of the lower tier disconnector 17 will never close because the link mechanism is in a free state.

Next, to open the upper tier disconnector 17,
The trip electromagnet 12 is energized, whereby the upper trip hook 2 rotates in the direction of the arrow and is removed from the roller 1. As a result, the link mechanism becomes free to trip, and the upper switch 11 is opened by the spring force of the blade spring 14 shown in FIGS. 4 and 5. At this time, the swing plate 22 also rotates in the direction of the arrow as the third and fourth links 6 and 7 move, and the upper rotation operating shaft 18 also rotates in the direction of the arrow. As a result, one of the connecting shafts 20 moves downward in the direction of the arrow. As the connecting shaft 20 moves downward, the lower trip-hook operating shaft 19a rotates in the direction of the arrow, and the trip-hook 2 integrated therewith rotates to a position where it engages the roller 1.

Therefore, when the lower closing electromagnet 3 is operated to close, the lower trip hooks 2 and 1 are engaged, so that the link mechanism is extended and the lower switch 11 is closed. Moreover, the lower rocking plate 22 rotates in the direction of the arrow in conjunction with the extension operation of the lower link mechanism, and the upper trip-hook operating shaft 19 is rotated in the direction of the arrow through the rotation operating shaft 18a and the shorter connecting shaft 20a. direction, and slightly rotate the trip hook 2, which is integrated with the trip hook 2, in the direction to remove it from the roller 1. Therefore, at this time (that is, when the lower closing electromagnet 3 is energized), there is no risk that the upper switch 11 will be closed even if the upper closing electromagnet 3 is accidentally closed. be.
Open the lower tier disconnector 17, and open the upper tier disconnector 1.
When closing circuit 7, each member of the interlock device operates in the opposite manner to that described above.

Effects of the invention As described above, according to the present invention, in a stacked cutter and cutter, the movement of the link mechanism of each upper and lower cutter and the movement of the trip hook are mechanically linked to each other. When one of the upper and lower loading electromagnets is activated, even if the other loading electromagnet is activated and the link mechanism attempts to extend, the trip hook will be rotated to the tripping position where it will come off the roller. Because of this, even if the upper and lower closing electromagnets are accidentally turned on and off at the same time, there is no danger that the upper and lower closing electromagnets and the rotating contacts of the disconnector will be opened and closed at the same time. Since it is a mechanical interlock device, it is more reliable than electrical means such as limit switches.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the interlock device for stacking and disconnecting devices according to the present invention, Fig. 2 is a rear view, Fig. 3 is a detailed view from the back, and Figs. FIG. 3 is a principle diagram of the device's closing mechanism. 1...roller, 2...trip hook, 3...throwing electromagnet, 4...movable iron core, 5...roller, 6...
...Third link, 7...Fourth link, 15...
First link, 16...Second link, 17...
Shade disconnector, 18, 18a... Rotating operating shaft, 1
9, 19a...Trip hook operating shaft, 20,
20a...Connection shaft.

Claims (1)

[Claims for Utility Model Registration] A link mechanism is formed by connecting first, second, third, and fourth links in a rotatable manner, and the free end side of the first link of the link mechanism is rotated. The fourth link is movably fixed and connected to the operating rod of the movable contact of the switch on the free end side of the fourth link, and a roller is provided at the connecting part of the first link and the second link to form the first section. , a roller is provided at the connecting portion of the second link and the third link to form a second joint, and a trip hook is provided that engages and releases the roller, and when the switch is turned on, the trip hook is connected to the roller. to restrict the movement of the first joint in the escape direction;
The second link is pushed to extend the third and second links above and below the link, and the operating rod is pushed up to close the movable contact, thereby preventing engagement with the trip hook when the switch is disconnected. The breakers are stacked one above the other in such a way that the first joint is released by tripping, and the extended link is shortened by the spring pressure of the break spring to open the movable contact of the switch. In stacking and disconnecting devices, each of the upper and lower stacks and disconnecting devices has a rotating operating shaft that rotates in conjunction with the expansion and contraction movements of the second link and third link, and a trip hook that rotates the trip hook. An operating shaft is provided, and the rotating operating shaft of one shear breaker and the trip-hook operating shaft of the other shear breaker are interlocked and connected via a connecting shaft, so that when one shear breaker is turned on, the rotating operating shaft is connected. The actuating shaft for the trip-hook of the other shear-breaker is rotated through the actuating shaft and the connecting shaft in the direction in which the trip-hook is disengaged from the engagement position with the roller. Interlock device.