JPH084663Y2 - Underground gas switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an underground gas switch mounted on a manhole.

(Prior Art) In recent years, underground power distribution has been performed from the viewpoint of urban aesthetics. When performing this underground power distribution, it has been common practice to install a switch on the ground. However, when the switch is installed on the ground, it is placed on the road, so that there is a problem that the passage area for pedestrians and the like is narrowed and the mounting place is restricted for safety.

(Problems to be solved by the invention) Therefore, it has been proposed to store the miniaturized gas switch in the manhole, but when mounting the gas switch in the manhole, check the gas switch. When
It is necessary to ground the gas switch in advance in order to prevent electric shock accidents for workers. However, since the inside of the manhole is small, it is very difficult to ground the gas switch. Therefore, there has been a demand for a gas switch which facilitates the grounding operation of the underground gas switch.

An object of the present invention is to solve the problems in the conventional techniques as described above, and to provide an underground gas switch which can easily perform a grounding operation and can clearly determine the grounded state.

(Means for Solving the Problem) The present invention relates to a gas switch in which the grounding operation by the operation handle for grounding is disabled when the switch is closed and the closing operation by the operation handle for closing the switch is disabled during grounding. The grounding operation axis that allows the grounding operation handle to be detachable and the grounding status display section that displays "grounded" and "non-grounded" in conjunction with the grounding operation handle are provided on the top of the switch case. It is a summary.

(Operation) With the above configuration, a grounding state display for displaying a "grounded" or "non-grounded" state in conjunction with a grounding operation shaft that allows the grounding operation handle to be attached to and detached from the upper surface of the switch case and the operation handle for grounding Since the unit is provided, when the grounding operation handle is operated without entering the manhole, the switch is grounded and the display unit displays the grounding state.

(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS.
It will be described in detail with reference to the drawings.

As shown in FIG. 1, the switch case 2 of the gas switch 1
Is formed in a rectangular box shape, and is partitioned by a pair of upper and lower partition plates 3 and 4 into an opening / closing chamber 5, a closing lock mechanism section 6 and an opening / closing drive section 7. An arc extinguishing gas is enclosed in the opening / closing chamber 5. A power supply side bushing 8 and a load side bushing 9 having inner ends projecting into the switching chamber 5 are fixed through the opposite sides of the switch case 2 for each phase. A fixed electrode 10 connected to a conductive member (not shown) in the bushing 8 is provided at the inner end of the power source side bushing 8 so as to project.

A fixed electrode (not shown) is provided at the inner end of the load side bushing 9 similarly to the fixed electrode 10 of the power source side bushing, and a movable electrode (not shown) is slidably arranged on the outer periphery thereof. There is. The movable electrode is arranged so that it can come into contact with and separate from the fixed electrode 10 on the power supply side. A cylindrical cylinder 11 made of insulating synthetic resin is connected and arranged on the outer periphery of the movable electrode, and a closing plate 12 fixed to the inner end of the load side bushing 9 is slidable at the base end of the cylinder 11. It is fitted inside. That is, the cylinder 11 is movable in the left-right direction in FIG. 1, and when the cylinder 11 moves openly from the chain line position to the solid line position, the gas in the cylinder 11 is compressed, and from the orifice 11a provided at the tip of the cylinder 11. The arc extinguishing gas is ejected to the fixed electrode 10 of the bushing 8 on the power source side.

A ground fixed electrode 13 connected to a load side fixed electrode (not shown) is fixed between the closing plate 12 and the inner end of the bushing 9, and a flat contact portion 13a is formed on the upper portion.

Next, the opening / closing drive mechanism A for driving the opening / closing of the movable electrode through the cylinder 11 will be described.

An opening / closing operation shaft 15 is rotatably supported on the side plate of the opening / closing case 2 corresponding to the opening / closing drive unit 7.
An opening / closing drive lever (not shown) is attached to the outer end of the. A swing lever 16 is fixed to an inner end of the opening / closing operation shaft 15, and a tip end portion of the swing link 16 extends downward through a long hole 17a of a bottom plate 17 constituting the switch case 2. .

A transmission shaft 18 extending in the vertical direction is rotatably supported between the bottom plate 17 and the partition plate 4, and a horizontal rocking lever is provided at a lower end of the transmission shaft 18 protruding downward from the bottom plate 17. 19 is fixed, and a locked member 14 is fixed to the upper end portion protruding upward from the partition plate 4. The horizontal swing lever
A direction change link 20 is provided between the tip of 19 and the swing lever 16.
Is rotatably supported. That is, the swing lever 16
2 swings in the clockwise direction or the counterclockwise direction in FIG.
Is converted into a swing along a horizontal plane.

In the opening / closing drive unit 7, a toggle mechanism (not shown) including a closing spring and an opening spring for quick closing and quick closing is linked to the transmission shaft 18, and the transmission shaft 18 moves in the closing direction or the opening direction. When rotated by a predetermined amount or more, the accumulated force of the spring of the toggle mechanism is released, and the transmission shaft 18 is driven in the closing or opening direction. Also, the opening / closing drive unit 7
An automatic opening / closing drive mechanism (not shown) including a solenoid is installed inside, and is linked to the transmission shaft 18 to enable opening / closing drive.

A vertically extending connecting shaft 21 is rotatably provided between the partition plates 3 and 4 at one side of the switch case 2 in the phase direction, and projects downward from the separating plate 4 of the connecting shaft 21. A lower transmission lever 22 is fixed to the lower end of the lower transmission lever so as to be horizontally rotatable. Further, the horizontal rotation lever 23 fixed to the transmission shaft 18 is rotatably attached to the lower transmission lever 22, so that the rotation torque of the transmission shaft 18 is transmitted to the connecting shaft 21. It has become. The upper end of the connecting shaft 21 is projected upward from the separator 3 and the upper transmission lever 24
Is fixed so as to be horizontally rotatable.

A drive shaft 25 is rotatably installed between the side plates of the switch case 2 so as to be located below the cylinder 11 of each phase in the switch chamber 5. An intermediate portion of a connecting lever 26 is fixed at a position corresponding to the connecting shaft 21 on the drive shaft 25, and a direction changing link 27 is rotatable between a lower end portion of the connecting lever 26 and the horizontal rotating lever 23. It is pivotally supported. That is, the rotation of the horizontal turning lever 23 along the horizontal plane is converted into the rotation of the connecting lever 26 along the vertical direction via the direction changing link 27.

An insulative swing arm 28 is fixed to the drive shaft 25 so as to correspond to each phase cylinder 11. Connecting protrusions 29a provided on the inner surfaces of the pair of arm portions 29 of the swing arm 28 that face each other.
Are linked to engagement grooves 11b provided on both sides of the cylinder 11. That is, when the drive shaft 25 is turned on and off, the cylinder 11 is driven to be turned on and off via the linking protrusion 29a of the swing arm 28.

A support shaft 30 extending over each phase is installed on both side plates of the opening / closing chamber 5 above the cylinder 11 for each phase, and the lower end of the support shaft 30 is rotatably attached to the upper end of the connecting lever 26. An intermediate portion of the ground lock lever 31 is rotatably supported. The ground lock lever 31 is provided on the drive shaft 25.
When the is rotated in the closing direction, the lock part on the upper end
31a rotates from the solid line position to the chain line position (lock position).

 Next, the ground drive mechanism B will be described.

An on / off display portion is provided on the upper plate 2a of the switch case 2. That is, the grounding operation shaft 33 is rotatably supported by the upper plate 2a, and the grounding operation handle 34 is detachably fitted to the upper end of the grounding operation shaft 33. A substantially triangular display lever 35 is fixed at one corner of the center of the grounding operation shaft 33.
The letters "grounded" and "non-grounded" are written on the display surfaces 35a and 35b at the other two corners of the top surface of 35 (for convenience of explanation, only the display surface 35a is marked "grounded"). .
The grounding operation shaft 33 and the display lever 35 constitute an on / off display portion. Further, a cover case 36 is provided on the upper plate 2a of the switch case 2, and a display hole 36a located above the turning locus of the display lever 35 is transparently provided in the cover case 36, and a display surface 35a, One of 35b can be selectively displayed. A spring support lever 37 is provided near the grounding operation shaft 33.
Is provided. The spring support lever 37 is supported by a shaft 39 standing upright on the upper plate 2a being rotatably and slidably inserted into and attached to a long hole 38 provided at one end of the spring support lever 37. The other end of the spring support lever 37 is rotatably supported on the lower surface of the display lever 35 by a shaft 37a. A coil spring 40 is wound around the spring support lever 37, and both ends of the coil spring 40 are locked to shafts 37a and 39 at both ends of the spring support lever 37. Therefore, the spring support lever 37
A toggle mechanism is constituted by the coil spring 40 and the spring support lever 37 and the display lever when the display lever 35 is rotated.
When the shaft 37a of 35 exceeds the dead point connecting the ground operation shaft 33 and the shaft 39, the accumulated force of the coil spring 40 is released, and the ground operation shaft 33 is rotated in either the ground direction or the non-ground direction. It has become.

A grounding drive lever 41 is horizontally provided at the inner end of the grounding operation shaft 33 protruding from the upper plate 2a to the opening / closing chamber 5. On the other hand, above the cylinder 11 of each phase, the support shaft 30
In parallel with the opening / closing chamber 5, a grounding rotation shaft 42 is installed for grounding, and one end of the grounding rotation shaft 42 corresponds to the ground lock lever 31 and has a lateral V-shaped grounding driven member. Lever 43
Is fixed.

Then, the ground drive lever 41 and the ground driven lever
A direction change link 44 is rotatably mounted between the upper ends of the shafts 43 so as to convert the horizontal rotation of the ground drive lever 41 into the vertical rotation of the ground driven lever 43. Further, the lower end of the ground driven lever 43 extends toward the ground lock lever 31 side, and when the ground lock lever 31 is located at the chain line position (lock position) in the non-ground position shown in FIG. The lock lever 31 interferes with the lock lever 31 so that it cannot rotate counterclockwise in FIG.

A ground movable electrode 45 is provided on the ground rotation shaft 42 for each phase so as to project toward the ground fixed electrode 13 side, and can be contacted and separated from the ground fixed electrode 13 by reciprocating rotation of the ground rotation shaft. There is. When the ground movable electrode 45 is connected to the ground fixed electrode 13, the load side of the switch 1 is connected to the ground movable electrode 45 and the ground rotation shaft 42.
It is grounded to the switch case 2 via the like.

Further, as shown in FIG. 3, the grounding operation shaft 33 is provided with a closing lock lever 47 projecting in the phase direction. At one corner of the opening / closing chamber 5 facing the closing lock lever 47, a direction changing lever 49 is horizontally rotatably supported via a bracket 48, and one end thereof is rotatably supported by the closing lock lever 47. The supported link 50 is rotatably supported.

As shown in FIGS. 1 and 3, an upper direction change lever 51 is axially supported on the inner surface of the side plate of the opening / closing chamber 5 facing the closing lock lever 47 so as to be vertically rotatable, and the lower end portion thereof has the above-mentioned structure. One end of a link link 52, which is rotatably supported by the other end of the direction change lever 49, is rotatably attached to the shaft. Therefore, the horizontal rotation of the direction changing lever 49 is converted into vertical rotation by the link link 52 and the upper direction changing lever 51.

Below the upper direction changing lever 51, a lower direction changing lever 53 is pivotally supported on the side plate of the opening / closing chamber 5 adjacent to the partition plate 3 so as to be vertically rotatable. The other end of the upper direction change lever 51 and one end of the lower direction change lever 53 are rotatably attached to both ends of a vertically extending connecting rod 54. The lower turning lever 53
A pair of engaging pins 55 spaced apart from each other is provided at the other end extending downward of the to project laterally.

An insertion shaft is attached to the separator plate 3 near the lower turning lever 53.
56 is rotatably supported, and a horizontal rotating plate 57 is fixed to the upper end portion thereof. Engagement pins 58 are provided upright on the horizontal rotation plate 57 apart from the center of rotation of the horizontal rotation plate, and are engaged between the engagement pins 55 of the lower direction change lever 53. That is, the horizontal rotation plate 57 is horizontally rotated through the engagement pin 55 and the engagement pin 58 by the vertical rotation of the lower direction change lever 53, and the insertion shaft 56 is rotated together with the horizontal rotation plate 57. It is supposed to do.

An inverted channel-shaped supporting member 59 is fixed near the insertion shaft 56 on the lower surface of the partition plate 3, and a lock rod 60 is provided on the transmission shaft 18 between both side plates of the supporting member 59. It is possible to move between a lock position located inside the turning locus of 14 and a release position outside the turning locus. The lock rod 60 has one end of an operating lever 61 fixed to the lower end of the insertion shaft 56 rotatably attached.
The reciprocating movement of the operating lever 61 in the horizontal direction reciprocates between the two positions.

Further, as shown in FIG. 1, a limit switch 62 is fixed on the lower surface of the partition plate 3 on the opposite side of the locked member 14 with the lock rod 61 interposed therebetween, and when the lock rod 60 is in the lock position, it is turned off. The automatic opening / closing mechanism is electrically locked so that it cannot be closed, and when it is in the release position, the automatic opening / closing mechanism is turned on to enable the closing operation.

The operation of the gas switch 1 configured as described above will be described.

Now, as shown in FIG. 1, the character "non-grounded" on the display surface 35b of the display lever 35 is in the non-grounded state, and the display hole 3 of the cover case 36
Corresponding to 6a, the gas switch 1 is open. In this state, the ground movable electrode 45 is in the solid line position, and the lock rod 60 is also in the solid line position.

When the opening / closing operation shaft 15 is rotated in the closing direction in this state,
The swing lever 16 is rotated in the arrow direction (clockwise direction) in FIG. 2, and the horizontal swing lever 19 is horizontally rotated via the direction change link 20. Then, the transmission shaft 18 moves the horizontal rotation lever 23,
The connecting shaft 21 is rotated via the lower transmission lever 22. By the rotation of the connecting shaft 21, the upper transmission lever 24 is horizontally rotated, and the drive shaft 25 is moved through the direction changing link 27 and the connecting lever 26.
Rotates in the closing direction (arrow direction). Then, the swing arm 28 moves the cylinder 11 to the position indicated by the chain line, and the movable electrode (not shown) is inserted into the fixed electrode 10 of the power source side bushing 8.

When the connecting lever 26 rotates in the closing direction, the ground lock lever 31 rotates from the solid line position to the chain line position (lock position).

Therefore, when the gas switch 3 is in the closed state, the ground lock lever 31 is located at the lock position, so that the ground driven lever 43 interferes with the ground lock lever 31 and cannot rotate counterclockwise in FIG. As a result, the grounding rotation shaft 42 also becomes unrotatable and the grounding operation cannot be performed.

In order to change the gas switch 1 from the closed state to the open state, the opening / closing operation shaft may be rotated in a direction opposite to the closing operation, that is, in the opening direction. Then, the respective members are moved in the opposite directions to the positions indicated by the solid line in FIG.

Next, when the gas switch 1 is in the open state shown in FIG. 1,
For grounding, with the grounding operation handle 34 attached to the grounding operation shaft 33, the grounding operation handle 34 is rotated in the arrow direction (grounding direction) shown in FIG. Then, the display lever 35
Is rotated in the same direction, the spring support lever 37 is rotated counterclockwise, and the coil spring 40 stores force.
Then, when the connecting shaft of the spring support lever 37 and the display lever 35 exceeds the dead point connecting the grounding operation shaft 33 and the shaft 39, the accumulated force of the coil spring 40 is released, and the grounding operation shaft 33 rapidly rotates in the grounding direction. To do.

Due to the rapid rotation of the grounding operation shaft in the grounding direction, the grounding drive lever 41 is rotated in the same direction, and the grounding drive lever 43 is rotated in the counterclockwise direction in FIG. As a result, the ground rotation shaft 42 is also rotated in the same direction. As a result, the ground movable electrode 45 becomes the ground fixed electrode 13
It is grounded by being connected to the contact portion 13a. During this grounding operation, the grounding lock lever 31 is in the solid line position, so the grounding driven lever 43 is the grounding lock lever.
31 will not interfere.

On the other hand, since the closing lock lever 47 is rotated in the same direction by the rapid rotation of the grounding operation shaft 33 in the grounding direction, the connecting link 50, the direction changing lever 49, the link link 52, the upper direction changing lever 51, and The connecting rods 54 are the third to third
By being moved in the direction of the arrow shown in the figure, the lower direction change lever 53 rotates in the vertical direction. By the rotation of the lower direction change lever 53, the horizontal rotation plate 57 is rotated in the closing lock direction via the engagement pin 55 and the engagement pin 58, so that the insertion shaft 56 is also rotated in the same direction.

Then, the lock rod 60 is driven in the direction of the arrow shown in FIG. 1 via the actuating lever 61 to move from the release position to the closing lock position, and is positioned within the rotation locus of the unlocking member 14.
Therefore, in this state, the locked member 14 cannot rotate in the closing direction, and the transmission shaft also cannot rotate in the closing direction, so that the closing operation cannot be performed. Further, when the lock rod 60 moves to the lock position, the limit switch 62 is turned off to electrically lock the automatic opening / closing mechanism.

After the display lever 35 is rapidly rotated, the word "ground" on the display surface 35a becomes visible from the outside in correspondence with the display hole 36a of the cover case 36.

To switch the gas switch 1 from the grounded state to the non-grounded state, the grounding operation handle 34 may be operated in the opposite direction. By this operation in the opposite direction, each member is driven in the direction opposite to the ground contact and returns to the position indicated by the solid line in FIG.
The gas switch 1 is ready for charging.

The present invention is not limited to the above-mentioned embodiment, and can be arbitrarily modified without departing from the spirit of the present invention.

(Effect of the Invention) As described above, the present invention is in the "grounded" and "non-grounded" states in conjunction with the grounding operation shaft that allows the grounding operation handle to be attached to and detached from the top of the switch case and the grounding operation handle. Since the grounding status display section that displays is displayed, the grounding operation handle can be operated without entering the manhole, and grounding work can be performed easily.
Since the grounded state display section displays "grounded" and "non-grounded", it is possible to confirm whether or not the grounding has been performed without entering the manhole.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an embodiment of a gas switch embodying the present invention, FIG. 2 is a left sectional view thereof, FIG. 3 is a partially cutaway plan view thereof, and FIG. It is a partial cutaway plan view. 1 ... Gas switch, 2 ... Switch case, 2a ... Top plate, 5 ... Opening / closing chamber, 13 ... Ground fixed electrode, 31 ... Ground lock lever, 34 ... On / off display Operation handle for grounding, 35 …… Display lever that composes the display, A ……
Open / close drive mechanism, B ... Ground drive mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takao Kumazawa, inventor Takao Kumazawa, No. 20 Kitakanyama, Otaka-cho, Midori-ku, Nagoya-shi, Aichi Chubu Electric Power Co., Inc. Electric Power Research Laboratory (72) Inventor, Kunio Mitsuguchi Inuyama, Aichi No. 1 Upper Ko Needle in Energy Support Co., Ltd. (72) Tetsuya Hasegawa Tetsuya Hasegawa Inuyama City, Aichi Prefecture No. 1 Upper Ko Needle in Energy Support Co., Ltd. (72) Takashi Kaneko 35 No. 35, Nagakusa Town, Obu City, Aichi Prefecture Japan High Pressure Denki Co., Ltd. Technical Research Center

Claims (1)

[Scope of utility model registration request] 1. A gas switch having a grounding operation handle that cannot be grounded by a grounding operation handle when the switch is closed, and a grounding operation handle that can be attached or detached in a gas switch that cannot be closed by a closing operation handle when the switch is grounded. An underground gas switch that is equipped with a grounding status display on the top of the switch case that displays "grounded" and "non-grounded" status in conjunction with the grounding operation shaft and the grounding handle. vessel.