JPH0474809B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching device for a high voltage branch device.

As a means to easily connect or disconnect branch cables in high voltage circuits,
It is conceivable to open/close/detach the branch part under load. The high voltage branch device shown in the example in Figure 1 is a type of cable connector that has the ability to switch lines.
It is used as a direct connection type cable termination for high-voltage equipment such as load opening/closing switches and transformers.The main part consists of two parts, for example, a load break elbow 1 and a load break plug unit 2, and it is connected in a straight line as shown by the broken line. Cables are connected and separated by moving the cable closer to or away from the cable.

The load break elbow 1 is provided with an L-shaped conductor 5 and an arc extinguisher 6 in the hollow chamber 4 of the insulating case 3, and is provided with an operating ring 7 for detachment on the outer wall of the insulating case 3. structure,
The load break plug unit 2 also includes a conductor connector 9 and an arc extinguishing collar 1 in an insulating case 8.
This is a structure in which 0, etc. are provided. Since such high voltage branching devices have the ability to repeatedly switch loads and have a compact structure, they are expected to be increasingly used in various power distribution systems.

Conventionally, the opening/closing operation of a high voltage branch device which is attached and detached by linear movement as shown in FIG. 1 has been performed by engaging an insulating hook rod with an operating ring 7. However, although it is easy to linearly reciprocate the insulating hook rod along its length, work efficiency is significantly reduced when operation in other directions is required. Therefore, there is a problem in that the installation location of the high voltage branch device is restricted from the viewpoint of workability, stability, safety, etc. in high voltage live line switching work. In other words, depending on the installation location of the high voltage branch device, it may become difficult to perform live line switching operations.

The present invention was made in consideration of these backgrounds, and is applicable to high voltage branch devices installed in places where it is difficult to operate the insulating hook rod, such as in narrowly restricted places or places with complicated surrounding space shapes. It is an object of the present invention to provide a switching operation device for a high voltage branch device that can safely and easily perform high voltage live line switching operations. To achieve this objective, the present invention deforms a spring by operating a swing handle to store elastic force, releases the stored elastic force of the spring by pulling a wire, and uses this force to attach and detach. It is characterized by being constructed so that the high voltage branching device can be opened and closed instantaneously.

Hereinafter, a specific embodiment of the present invention will be described based on the drawings. As shown in FIG.
The leading end of the main shaft 12 is connected to a high voltage branching device such as the one shown in FIG. It is movably supported within a range of L. Also,
Inside the casing 11, a switching link 16 is rotatably connected to the main shaft 12 by a pivot 15, and the tip of the switching link 16 protrudes through the casing 11 and can be switched by external operation. A switching shaft 17 for switching the position of the link 16 is provided. The switching shaft 17 is moved along a switching guide groove 22 that is continuously formed in a meandering manner through the flesh of the casing 11, and is slid within the casing 11 in a direction parallel to the main shaft 12. Upper rack 18 and lower rack 19 freely supported and spaced apart from each other
The upper and lower U-shaped grooves 20 and 21 are selectively engaged with each other.

Further, the upper and lower racks 18 and 19 are provided with rack gears 18a and 19b facing each other,
A pinion gear 23 rotatably supported by the casing 11 is meshed with these rack gears 18a and 19b. When the ratchet mechanism 24 is operated by swinging,
The pinion gear 23 rotates counterclockwise in FIG. 2 to move the upper rack 18 to the left and lower rack 1.
9 to the right. A pawl plate 26 having "sawtooth" pawls is provided on the side of the upper rack 18, and a locking shaft 26' is engaged with the pawls of this pawl plate 26. In other words, these pawls Upper rack 1 is secured by plate 26 and locking shaft 26'.
A locking mechanism 27 is constructed to prevent the movement of the lower rack 8 toward the right in FIG. 2, and therefore the movement of the lower rack 19 toward the left. Also, the locking shaft 2
A latching hole 26a is formed in the middle part of 6'.
The head of the tripping cam 28 is engaged here in a latched state. The cam shaft 29 rotatably supports the tripping cam 28.
8 is rotated counterclockwise in FIG. 2 to push down the locking shaft 26' to separate it from the pawl plate 26, thereby releasing the engaged state between the two. ing. This tripping lever 30 is integrally provided with a safety lock piece 31 that extends near the ratchet mechanism 24, and when the power storage lever 25 is attached to the ratchet mechanism 24, the safety lock piece 31 locks the power storage lever 2.
5 (for example, a fitting boss portion) to prevent rotation of the tripping cam 28 in the unlocking direction (counterclockwise in FIG. 2). Note that the tripping cam 28 and the tripping lever 30 are provided with springs 32 and 33, respectively, for stabilizing their state positions. A viewing window 34 penetrating the flesh of the casing 11 is provided near both springs 32 and 33 and the tripping lever 30.
0 is connected to the tip of a control wire 35 for rotating the camshaft 29 counterclockwise in FIG. It is pulled out of the casing 11 via the casing 11, and its rear end is connected to an operating tool 37. Further, the locking shaft 26' is constantly held on the claw plate by the elastic force of the spring 38.
6, and its strength can be adjusted from the outside by an adjustment screw 39 screwed into the casing 11.

On the other hand, a guide shaft 40 is provided at a side position of the upper rack 18 (upper position in FIG. 2) parallel to the moving direction of the upper rack 18, and a coil-shaped force storage spring 41 is attached to this guide shaft 40. Slide bearing 4
2 are fitted onto the outside, and the slide bearing 42 movably supports a slide arm 43 that is integral with the upper rack 18. Inside the casing 11, a slide arm 43 is pressed and moved to the state shown in FIG. 2 by the elastic force of the force storage spring 41.
upper stopper portion 44 for stopping the
, a lower stopper section 45 for stopping the lower rack 19 that has moved in the opposite direction to the slide arm 43, upper rack 18, etc. at that position, and a rebound phenomenon when the slide arm 43 hits the upper stopper section 44. A lock pin 46 is provided to prevent the upper rack 18 from moving backward in the left direction in FIG. This lock pin 4
6 is made to protrude into the casing 11 by the elastic force of the lock spring 47 and is set to intersect with the moving upper rack 18, as shown in FIG.
It is made to appear and retract into the casing 11 by moving between the solid line position and the chain line position in the figure.

Furthermore, the operating tool 37 in the example in FIG.
A grip 50 is fixed to the proximal end of a sleeve 49 which is inserted into the sleeve 49 for protection;
The control wire 3 is slidably provided at the
The trigger 51 applies tension to the trigger 5 (pulls the control wire), and the safety pin 52 is detachably attached to the grip 50 and prevents the trigger 51 from moving.

In addition, in the example shown in FIG. 3, the ratchet mechanism 2
By engaging the square hole of the hub 54 of the power storage lever 25 with the square shaft 53 connected to the power storage lever 4, the safety lock piece 31 protruding outside the casing 11 is brought into contact with the circumferential surface of the hub 54. The safety lock piece 31 is housed in the casing 11, and the power storage lever 25 is
The hub 54 may be inserted into a through hole formed in the casing 11 to maintain the same locked state as described above.

The opening/closing operation machine having such a structure has a main shaft 1
By linearly reciprocating movement of 2, the high voltage branching device shown in the example in FIG. 1 can be opened, closed, and removed. An example of how to use the device will be described with reference to FIG. 5.

A high voltage branching device 62, which is an object to be opened/closed/detached by the opening/closing operating device of the present invention, is provided on a mounting frame 61 in the pit 60. This high voltage branching device 62 has a plurality of load break plug units 2, which are fixed parts, mounted and fixed in parallel on a mounting frame 61, and each of these plug units 2
A plurality of load break elbows 1, which can be attached and detached from each other, are integrally connected in parallel to each other by a mounting plate 63. Further, the mounting frame 61 is provided with a frame-like stand 64, and the mounting plate 63 is supported on the stand 64 so as to be able to move in parallel in the opening/closing direction. Therefore, by fixing the opening/closing operating device A according to the present invention to the stand 64, connecting its main shaft 12 to the mounting plate 63, and performing an operation of linearly pulling or pushing it, The high voltage branch device 62 is opened, closed and removed.

"Opening operation" When the elastic force of the force storage spring 41 is the smallest, that is, when the slide arm 43 is in the upper stopper section 4
4, the switching shaft 17 is engaged with the lower U-shaped groove 21. The switching shaft 17 is in the upper U-shaped groove 2
0, the switching shaft 17 is moved along the switching guide groove 22 and engaged with the lower U-shaped groove 21. This operation brings the main shaft 12 and the lower rack 19 into a connected state via the switching link 16.

When the power storage lever 25 is engaged with the square shaft 53,
The safety lock piece 31 of the tripping lever 30 comes into contact with the circumferential surface of the hub 54 and prevents the tripping lever 30 from rotating in the counterclockwise direction in FIG. It also prevents the rotation of the cam 28, so that the locking shaft 2
6' is restrained from moving, and the engaged state between the locking shaft 26' and the pawl plate 26 is maintained. That is, even if the control wire 35 is pulled, the locking shaft 26' remains locked and does not move.

Further, the safety pin 52 of the operating tool 37 is inserted as shown by the solid line in FIG. 2 to prevent the trigger 51 from moving.

Next, pull the knob 48 to release the lock pin 46.
The intersecting state between the upper rack 18 and the claw plate 26 is released. In other words, the lock pin 46 can be retracted without protruding into the casing 11.

The rocking operation of the power storage lever 25 is then started while the lock pin 46 remains retracted. This swinging operation causes the pinion gear 23 to rotate counterclockwise in FIG. 2, and the upper and lower racks 18, 19 accordingly move intermittently from the position shown by the solid line to the position shown by the chain line in FIG. The drive will continue to shift. In the process of this drive shift, the elastic force stored in the force storage spring 41 is caused by the movement of the upper and lower racks 18, 19 in the opposite direction to the above drive shift due to the engagement between the locking shaft 26' and the pawl plate 26. Since it is blocked by the lock mechanism 27, it will not be released (that is, the elastic force will be reliably stored).

Further, when the upper rack 18 is driven and reaches a position where it closes the tip end surface of the lock pin 46, the knob 4
8, the tip of the lock pin 46 pushed by the elastic force of the lock spring 47 does not protrude into the casing 11, and the upper rack 18 and claw plate 26
Since the upper rack 18 only slips by contacting the side wall of the upper rack 18, the movement of the upper rack 18 is not obstructed thereafter.

By swinging the force storage lever 25, the upper and lower racks 18 and 19 are driven to their final movement positions, and sufficient elastic force is stored in the force storage spring 41, and the switching shaft 17 moves to the chain line in FIG. The state of engagement with the lower U-shaped groove 21 at the position indicated by is maintained.

Next, the opening/closing operation device A is placed on the stand 64 (fifth
(see figure), the connecting fitting 13 is coupled to the mounting plate 63 that connects the plurality of load break elbows 1 together. Further, the opening/closing operation device A is fixed to the stand 64.

When the power storage lever 25 is pulled out from the square shaft 53, the safety lock piece 31 is released from contact with the circumferential surface of the hub 54 of the power storage lever 25, and the pull-out lever 30 rotates counterclockwise around the camshaft 29. Once the motor is ready for movement, the first stage safety lock is released.

Further, the second stage safety lock is released by positioning the operating tool 37 at a location away from the pit 60 and the high voltage branch device and pulling out the safety pin 52.

After the above operation, the grip 50 of the operating tool 37
When the trigger 51 is pulled, the control wire 35 is pulled and the release lever 30 is rotated counterclockwise in FIG. 2 about the camshaft 29.
8 is also rotated counterclockwise, and
The locking shaft 26' is pressed downward in FIG. 2, and the engagement with the claw plate 26 is released.

When the locking shaft 26' is disengaged from the claw plate 26, the elastic force stored in the force storage spring 41 is released, and the upper rack 18 is moved to the right in FIG. 2 and downward via the pinion gear 23. The rack 19 is instantaneously moved toward the left, and the main shaft 12 is moved through the switching link 16 that is engaged with the lower U-shaped groove 21.
moves instantaneously by a distance L toward the left in FIG. It is pulled out and the electrical circuit is opened.

In addition, the lock pin 46 protrudes into the casing 11 due to the elastic force of the lock spring 47 just before the upper and lower racks 18, 19 and the slide arm 43 abut against the upper and lower stoppers 44, 45, so that the upper rack 18 is caused to bounce back. Second
The reaction movement toward the left in the figure is prevented, and the main shaft 1
2 back movement is prevented.

"Loading operation" Load break elbow 1 is operated by opening/closing operation device A.
When fitting the switch to the load break plug unit 2, it is done by engaging the switching shaft 17 with the upper U-shaped groove 20. That is, when the elastic force of the force storage spring 41 is the smallest,
In other words, the switching shaft 17 is engaged with the upper U-shaped groove 20 when the upper and lower racks 18 and 19 are in the solid line position shown in FIG. , thereby automatically applying the first stage safety lock, inserting the safety pin 52 of the operating tool 37 to apply the second stage safety lock, and pulling the knob 48 to release the power storage lever. 25 to compress the force storage spring 41 to accumulate sufficient elastic force, and then move the mounting plate 63 supporting the load break elbow 1 along the stand 64 to secure the main shaft. Connect the connecting fitting 13 at the tip of 12 to the mounting plate 63, and attach the casing 11 to the stand 64.
Fixed to.

Pull out the power storage lever 25 from the square shaft 53,
Therefore, the first stage safety lock is released, and the safety pin 52 is pulled out to release the second stage safety lock.

When the trigger 51 of the operating tool 37 is pulled, the control wire 35 is pulled and the release lever 3 is pulled.
0 and the tripping cam 28 are rotated counterclockwise in FIG.

When the locking shaft 26' is disengaged from the claw plate 26, the elastic force stored in the force storage spring 31 is released, and the slide arm 43 and the upper rack 18
is instantaneously pressed and moved toward the right in FIG. 2, and the main shaft 12 is instantaneously moved toward the right in FIG. 2 via the switching link 16 that engages with the upper U-shaped groove 20. The load break elbow 1 fixed to the mounting plate 63 is press-fitted into the load break plug unit 2, and the electric circuit is turned on.

In the example of FIG. 2, the switching guide groove 22 is a continuous through hole in a winding pattern, but if a part of the casing 11 has an opening/closing or opening structure to enable switching operation, the embodiment structure. Furthermore, the structure of the lock mechanism 27, which is released by pulling the control wire 35, is not limited to that of the embodiment.

As explained above, according to the present invention, elastic force can be stored in the power storage spring simply by swinging the power storage lever, so the power storage operation is extremely easy.

By switching the switching link, the moving direction of the main shaft can be arbitrarily set to either the "push" or "pull" direction, and can therefore be applied to both opening and closing operations of a high voltage branch device.

Because the elastic force stored in the power storage spring is released by pulling the extended control wire outside the casing, high voltage branching is possible regardless of the installation location of the high voltage branch device or its surrounding environment. Opening/closing operations of the voltage branching device can be performed easily, safely and reliably by remote control from a position separated by a considerable distance.

When the power storage lever is attached to the ratchet mechanism, the lock mechanism prevents the vertical rack from moving regardless of the pulling operation of the control wire, thereby eliminating the possibility of an accident due to erroneous operation.

It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an example of the structure of a high voltage branch device that is to be opened/closed and removed by the opening/closing operating device of the present invention, and FIG. 2 is an embodiment of the opening/closing operating device of the present invention. 3 is a sectional view taken along the line - in FIG. 2, and FIG. 4 is a partial sectional view showing an example of the reaction movement prevention mechanism of the upper rack of the opening/closing operating device according to the present invention. FIG. 5 is an explanatory diagram showing an example of how to use the opening/closing operating device according to the present invention. 1...Load break elbow, 2...Load break plug unit, 11...Casing, 1
2... Main shaft, 16... Switching link, 18... Upper rack, 19... Lower rack, 23... Pinion gear, 24... Ratchet mechanism, 25... Force storage lever, 26'... Locking shaft, 27 ...Lock mechanism, 3
0...Removal lever, 31...Safety lock piece,
35... Control wire, 37... Operating tool,
41... Energy storage spring, 46... Lock pin, 50...
... Grip, 51 ... Trigger, 52 ... Safety pin, 53 ... Square shaft, 54 ... Hub, 62 ... High voltage branch device, A ... Opening/closing operation device.

Claims (1)

[Scope of Claims] 1. A main shaft 12 which is detachably connected to the high voltage branching device 62 and supported by the casing 11 so as to be able to reciprocate; and a main shaft 12 which is supported by the casing 11 so as to be movable along the moving direction of the main shaft 12 The upper and lower racks 18 and 19 are engaged with the pinion gear 23, which is rotated in one direction by the ratchet mechanism 24 when the power storage lever 25 is oscillated, and the upper and lower racks are driven in opposite directions. A switching link 16 that selectively connects either one of 18 and 19 to the main shaft 12, and an upper and lower rack 18,
19; a lock mechanism 27 that stops the movement of the upper and lower racks 18 and 19 with the elastic force stored in the force storage spring 41; Control wire 35 pulled out and extended outside the casing 11
An opening/closing operating device for a high voltage branch device, comprising an operating tool 37 provided outside the casing 11 for unlocking the locking mechanism 27 through the casing 11. 2. It has a release lever 30 that is rotated by pulling the control wire 35 to move the locking shaft 26' in the unlocking direction, and
A part of the safety lock piece 3 of this release lever 30
1 comes into contact with the circumferential surface of the hub 54 of the force storage lever 25 connected to the ratchet mechanism 24, thereby preventing the rotation of the release lever 30. Opening/closing operation device for high voltage branch equipment. 3. It has a lock pin 46 that is protruded from the outside of the casing 11 into the inside of the casing 11 and can be freely operated in and out of the casing 11, and this lock pin 46 has a
To prevent the reaction movement of the upper and lower racks 18 and 19 by abutting and contacting the rear end surface of either one of the upper and lower racks 18 and 19 in a state where they are pressed and moved by the elastic force of the force storage spring 41 and stopped. An opening/closing operating device for a high voltage branch device according to claims 1 and 2, characterized in that: