JPH035068Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to an opening/closing operation mechanism for a switch in which switching parts for each phase are arranged vertically.

(Prior Art) Generally, each phase wire of a power distribution line is arranged along a horizontal plane, and in a switch arranged on a pole, each phase is arranged side by side due to this correspondence. Therefore, the operating rotation axis that drives each phase opening/closing part at once is arranged horizontally, and is directly operated by vertically rotating the operating handle using an operating string from the ground. A switch in which each phase is arranged vertically has also been proposed.

As mentioned above, in a switch where each phase is arranged vertically, the opening/closing rotation axis provided across each phase is also arranged vertically, so this does not cause any problem in the case of an automatic switch. In order to manually operate the utility pole from below using the operating cord, the existing horizontal opening/closing structure cannot be used as is.
It is necessary to convert vertical rotation from the ground into horizontal rotation of the drive shaft. Some systems use bevel gears, for example, for the conversion operation, but the number of parts for the conversion operation has increased and the structure has become complicated.

(Problems to be solved by the invention) This invention solves the problem of the complex structure and large size of the conversion mechanism in response to the recent miniaturization of switches due to gasification, etc. in switches in which each phase is arranged vertically. This was done to eliminate the problem of

Structure of the invention (means for solving problems) The operating mechanism of the switch of this invention has the opening/closing parts of each phase arranged vertically, and the opening/closing rotation axis that drives the opening/closing parts all at once to open and close is vertically aligned. In a switch arranged so as to be rotatable around its axis, an operation rotation axis that can be externally operated is perpendicular to the opening/closing rotation axis and can be rotated around its axis. At the same time, a lever with a pin protruding from the tip is fixed to the opening/closing rotation shaft and the operation rotation shaft, and a sliding hole is inserted between the two levers with each pin in a twisted position at both ends. The gist of this is that they are linked by a connecting link that can be supported through.

(Function) By operating the operation rotation shaft arranged so as to be rotatable in the horizontal direction, each phase arranged vertically can be opened/closed via the opening/closing rotation shaft arranged so as to be rotatable in the vertical direction and around its axis. The opening/closing parts are driven to open/close all at once.

In addition, the mechanism has a simple structure that corresponds to the recent miniaturization of switches, and even when each phase is arranged vertically, the operation rotation axis can be easily rotated along the vertical direction using an operation string from the ground. The opening/closing rotation shaft is driven to open and close.

(Example) An example in which this invention is embodied in a gas switch will be described below with reference to FIGS. 1 to 7.

In FIG. 1, bushings 2 for each phase are inserted and arranged vertically on both sides of a switch case 1 in which an arc-extinguishing gas such as SF6 is sealed at a constant pressure. A square support plate 3 is provided on the upper surface of the switch case 1.
is mounted and fixed by tightening nuts 4a to a plurality of support bolts 4 planted on the upper surface of the switch case 1. Mounting and fixing pieces 5 are provided protruding from both sides of the support plate 3. A mechanism part case 6 in the form of a square box with a lid is arranged on the support plate 3, and the mechanism part case 6 has mounting pieces 7 provided at the lower part of both side walls connected to the mounting fixing pieces 5 of the support plate 3. Corresponding bolt 8 and nut 8a
are attached by tightening them together.

In the switch case 1, an opening/closing rotation shaft 9 is rotatably arranged in the center in the left-right direction so as to extend in the vertical direction, and each phase is opened/closed by rotating the opening/closing rotation shaft 9 to open and close. The device (not shown) can be driven to open and close. The upper end of the opening/closing rotation shaft 9 is projected upward through the upper wall of the switch case 1 and the support plate 3, and a metal 10 is fixed to the upper end with a split pin 11 and the mechanism case It is pivotally connected via the metal 10 to a bearing 12 provided at the inner top of the housing 6 .

A driven lever 13 is fixed to a position below the metal 10 on the opening/closing rotation shaft 9. An engaging protrusion 27 is provided on one side of the base end of the driven lever 13 and is flared on both sides. The opening/closing rotation shaft 9 is provided at the front and rear portions of the support plate 3.
A pair of supporting brackets 14, 15 facing each other are located at a position slightly to the left (in FIG. 3).
is fixed. Note that one support bracket 15 is composed of a fixing plate 16 fixed to the supporting plate 3 by welding or the like, and a bracket plate 18 tightened and fixed to the fixing plate 16 with bolts 17.

An operation rotation shaft 19 is rotatably installed between the support brackets 14 and 15 at a position below the driven lever 13. That is, the operating rotation shaft 19 has a torsional positional relationship with the opening/closing rotation shaft 9, and is arranged so as to face in a direction 90 degrees different from the opening/closing rotation shaft 9. A drive lever 20 is fixed to the rear end of the operating rotation shaft 19 so as to face diagonally upward, and a fitting pin 5 is provided on the side surface of the opening/closing rotation shaft 9 at the tip of the drive lever 20.
2 is provided protrudingly. A prismatic connecting link 21 is slidably and rotatably inserted into the fitting pin 52 through a sliding hole 22a formed in the side surface of one end thereof.

A sliding hole 22b is provided in the other end of the connecting link 21 in the vertical direction, and a sliding pin 23 fixed to the lower surface of the tip of the driven lever 13 slides into the sliding hole 22b from above. It is movably inserted.
Note that the sliding hole 22b and the sliding pin 23 are set to have a length that partially abuts each other in the inserted state and does not come off.

In FIG. 4, a stopper 24 is fixed to the inner surface of the support bracket 15, and stops the drive lever 20 rotated in the closing direction to restrict the closing rotation of the drive lever 20. ing.

The operating rotation shaft 19, the driving lever 20, the connecting link 21, the driven lever 13, and the opening/closing rotation shaft 9 constitute an opening/closing operation mechanism A.

An insertion groove 6a is formed from the lower part of the front surface of the mechanism case in correspondence with the operation rotation shaft 19. An operating handle 25 is fixed to the front end of the operating rotation shaft 19 that protrudes forward from the insertion groove 6a, and operating strings (not shown) attached to both ends of the operating handle 25 are connected from below. It is now possible to operate it. Note that 26 is a bolt for tightening and fixing the front wall of the mechanism case 6 to the support bracket 14.

The gas pressure lowering lock device B provided near the opening/closing operation mechanism A will be explained.

A bellows case 28 in the form of a closed cylinder is attached to the upper wall of the switch case 1 near the front position (in FIG. 3) of the opening/closing rotating shaft 9, and the upper end of the bellows case 28 is connected to the mechanism via the support plate 3. The locking step 29 is disposed within the case 6, and a locking step 29 that goes around is formed on the upper end surface. A bellows (not shown) that can expand and contract as the gas pressure in the switch case 1 fluctuates is installed inside the bellows case 28, and an operating rod 30 is fixedly installed in the upper part of the bellows. It projects upwardly through the upper wall of 28.

The bellows case 28 is covered with a cylindrical cover 32 having a circumferential locking step 31 formed on its inner peripheral surface.
An O-ring 33 is interposed between the holes 9 and 9.
A mounting protrusion 34 is provided on the outer periphery of the cover 32, and by tightening screws 35 to the support plate 3 via the mounting protrusion 34, the cover 32 cooperates with the bellows case 28 to attach the O-ring 33. It is fixed to the support plate 3 so as to pinch it.

The inner top of the cover 32 and the bellows case 28
A lock rotation shaft 36 is rotatably installed between the front and rear sides of the cover 32 between the upper end surfaces thereof. Note that O-rings 37 and 38 are disposed at both front and rear ends of a lock rotation shaft 36 that is rotatably supported in bearing holes 32a and 32b of the cover 32.

A lock member 39 having a substantially L-shaped cross section is fixed to the rear end of the lock rotation shaft 36. When this locking member 39 is rotated in the locking direction in FIG.
3, and in the locked state, it is positioned on the rotation locus of the engagement protrusion 27 and can be engaged with the engagement protrusion 27. In addition, the lock rotation shaft 36
A sleeve 40 is interposed between the lock member 39 and the cover 32.

In addition, a display plate 41 is provided at the front end of the lock rotation shaft 36.
is fixed. The upper side surface of the display board 41 is colored to indicate an unlocked state, and the lower side surface is colored to indicate a locked state (for example, red). And this display board 4
1, when the locking member 39 is in the unlocked state, a display color indicating the unlocked state is visible from the outside on the upper side surface of the locking member 39 corresponding to the display hole 42 formed through the front wall of the mechanism case 6. At the same time, when in the locked state, it rotates to correspond to the display hole 42, and a display color indicating the locked state on the lower side surface is visible from the outside.

Further, an engagement pin 43 having a hexagonal hole on the base end surface is screwed into approximately the center of the lock rotation shaft 36. The tip of the engagement pin 43 is the lock rotation shaft 36.
It protrudes downward from the bellows (not shown) and can be locked to the actuating rod 30 of the bellows (not shown). Further, the base end of the engagement pin 43 projects upward from the lock rotation shaft 36, and a nut 44 for preventing the engagement pin 43 from coming off is screwed into the base end.

Therefore, this engagement pin 43 is connected to the lock rotation shaft 36.
It is now possible to adjust the amount of screwing in. The amount of engagement of the operating rod 30 of the bellows (not shown) with the engagement pin 43 is set such that the engagement relationship is released when the gas pressure in the switch case 1 drops below a predetermined value. .

A pair of locking pins 45 spaced apart from each other are fixed to the lock rotation shaft 36 in the cover 32, and the lock rotation shaft 3 is fixed between the locking pins 45.
6 has both ends of a biasing spring 46 wound around it.
Both ends of the biasing spring 46 are latched to the locking pin 45, and the center portion of the biasing spring 46 is attached to the cover 3.
2, so that the lock rotation shaft 36 is always urged to rotate in the lock direction (in the direction of arrow S in FIG. 6).

A through hole 47 is formed in the center of the upper wall of the cover 32 to correspond to the engagement pin 43, so that the nut 44 and the engagement pin 43 can be operated from outside the cover 32. A lid 48 is fitted into the through hole 47, and a flange 49 that abuts the upper surface of the cover 32 is formed projecting from the upper peripheral edge of the lid 48.
The lid 48 is removably attached to the cover 32 by screwing screws 50 into the cover 32 via the flange 49. Note that an O-ring 51 is fitted to the outer circumferential portion of the lid 48 and is brought into close contact with the inner circumferential surface of the through hole 47 .

The operation of the switch configured as described above will be explained.

Now, in FIGS. 2 and 3, the switch is in an open state, the gas pressure in the switch case 1 is normal, and the opening/closing operation mechanism A is in an operable state. In this state, the display plate 4 of the gas pressure lowering lock device B
1 is visually recognized from the outside through the display hole 42 by a display color applied to the upper side surface indicating the unlocked state.

When the operating handle 25 is turned in this state, the operating rotation shaft 19 is rotated in the closing direction, and as a result, the drive lever 20 is also rotated in the same direction, so that the fitting pin protruding from the lever 20 is rotated. 52 slides and rotates with respect to the sliding hole 22a of the connecting link 21 to move the connecting link 21 to the right (in FIG. 2).

Therefore, the sliding pin 23 is slid and rotated and pressed against the inner surface of the sliding hole 22b provided on the other side of the connecting link 21, and is moved to the right in FIG. By pressing the connecting link 21, the driven lever 13 is rotated via the sliding pin 23 in the closing direction (in the direction of the arrow P in FIG. 3). Then, as shown in FIG. 4, the opening/closing rotation shaft 9 is rotated in the same direction, and the opening/closing parts of each phase are driven to close at the same time.

Note that during driving, the connecting link 21 is operated with an arcuate locus due to the rotation of the fitting pin 52 and the sliding pin 23, but in both cases, the connecting link 21 moves with the sliding pin 23 relative to the fitting pin 52. In response to the rotation of the sliding pin 23, the connecting link 21 is moved back and forth through the sliding hole 22a relative to the fitting pin 52 to the left and right. smooth movement.

As a result, even though the levers 13 and 20 are arranged close to each other, the rotational force along the vertical direction of the operating rotation shaft 19 is smoothly converted into the rotational force along the horizontal direction of the opening/closing rotation shaft 9. be done. In this way, there is no rotational force loss during driving, and even though the shafts 9 and 19 are close to each other, the rotation of the operating handle 25 is caused by the linear movement of the connecting link 21, and further by the rotation of the opening/closing rotation shaft 9. It will be smoothly converted into motion.

Moreover, in order to open the switch in the closed state shown in FIG. 4, it is only necessary to operate it in the opposite direction to that described above.

That is, when the operation handle 25 is rotated in the opening direction, the operation rotation shaft 19 is rotated in the opening direction.
As a result, the drive lever 20 is also rotated in the same direction.
Then, the connecting link 21 is moved to the left in FIG. 2 while pressing and sliding on the sliding pin 23. Due to this pressing of the connecting link 21, the driven lever 13 is rotated via the sliding pin 23 in the opening direction (in the direction of the arrow opposite to P in FIG. 3). As a result, as shown in FIG. 2, the opening/closing rotation shaft 9 is rotated in the same direction, and the opening/closing parts of each phase are driven to open at the same time.

Next, for example, when the gas pressure inside the switch case 1 falls below a predetermined value in the state shown in FIG. The actuating rod 30 is operated by the difference between the internal pressure and the actuating rod 30 to retreat in the anti-engagement direction, that is, toward the switch case 1 side (downward in FIG. 6). Then, the engagement between the actuating rod 30 and the engaging pin 43 is released, so that the lock rotation shaft 36 is rotated in the direction of the arrow S in FIG. 6 due to the urging force of the urging spring 46.

Then, the locking member 39 rotates in the locking direction until one side thereof engages with the proximal side of the driven lever 13. This lock member 39 is the driven lever 13.
In the locked state, it is positioned on the rotation locus of the engagement protrusion 27 and can be engaged with the engagement protrusion 27.
Therefore, since the drive lever 13 becomes inoperable,
Even if an attempt is made to rotate the operating handle 25 in the opening direction, the operation becomes impossible.

On the other hand, when the lock rotation shaft 36 rotates in the direction of arrow S, the display plate 41 is also rotated in the same direction, and the lower side surface of the display plate 41 moves correspondingly to the display hole 42, indicating the locked state. The displayed color is visible from the outside through the display hole 42.

Note that when the gas pressure inside the switch case 1 decreases while the opening/closing operation mechanism A is in the open state, the lock member 3
The only difference is that 9 is engaged with the side of the driven lever 13 opposite to that in the closed state. Therefore, the driven lever is interfered with by the locking member 39 and cannot be rotated in the closing direction, so that the operating handle 25 cannot be operated.

It should be noted that this invention is not limited to the above-mentioned embodiments, and may be modified as desired without departing from the spirit of the invention, such as by implementing it in other switches.

Effects of the invention The switch configured as described above corresponds to the recent miniaturization, and has different directions of rotation of the operating rotation axis along the vertical direction and rotation of the opening/closing rotation axis along the horizontal direction. However, by using a simple structure in which the levers provided on each shaft are linked by a single link, and by arranging the link so that it can slide relative to the pin protruding from each lever, the shaft The mechanism can be arranged in a small space, and the switch can be made smaller as a whole.
In addition, since each phase can be arranged vertically, the switch can be mounted on a pole in places where it would be difficult to install switches where each phase is arranged horizontally due to the pillar installation space. It is also useful for beautifying pillars. In addition, even if each phase is arranged vertically as described above, the operating handle can be remotely controlled from below the utility pole using an operating string, etc., so there is no difficulty in opening and closing the switch. This is an excellent idea for use.

[Brief explanation of the drawing]

Fig. 1 is an overall front view of a switch that embodies this invention, Fig. 2 is a partially cutaway front sectional view of the opening/closing operation mechanism in the mechanism case in an open state, and Fig. 3
4 is a perspective view of the main parts of the opening/closing mechanism in the closed state, and FIG. 5 is a plan sectional view of the gas pressure lowering lock device. 6 is a front sectional view, and FIG. 7 is a partially cutaway front sectional view of the inside of the mechanism case, showing the action of the gas pressure reduction lock device. 1... Switch case, 6... Mechanism case, 9
...Opening/closing rotation axis, 13...Driven lever, 19...
Operation rotation axis, 20... Drive lever, 21... Connection link, 22a, 22b... Sliding hole, 23... Sliding pin, 25... Operation handle, 28... Bellows case, 36... Lock rotation Dynamic shaft, 39...Lock member, 41...Display plate, 46...Biasing spring, 5
2...Mating pin.

Claims (1)

[Claims for Utility Model Registration] The opening/closing parts of each phase are arranged vertically, and the opening/closing rotation shaft that drives the opening/closing parts to open and close all at once is arranged so as to be rotatable in the vertical direction and around its axis. In the switch, an operation rotation axis that can be externally operated is disposed perpendicular to the opening/closing rotation axis and rotatable around the axial direction thereof, and the opening/closing rotation axis and the operation rotation axis are A lever having a protruding pin at its tip is fixedly attached to each of the levers, and the levers are connected to each other by a connecting link that can support each of the pins through sliding holes at both ends at a twisted position. The opening/closing operation mechanism of the switch.