JPH01183023A - Gas insulated breaker - Google Patents

Abstract

PURPOSE:To simplify the mechanism and to improve the reliability for a long period by linking a lever fixed to an operation shaft and the like directly to a cam and the like as a driving and operating mechanism of a vacuum interrupter. CONSTITUTION:At three specific intermediate points of an operation shaft 29 which is furnished in an operation shaft installing section 4, pressure welded spring levers 45 projecting in the square direction from the shaft rods respectively are furnished. Unitary type insulating rods 47 are connected to the levers 45 through pressure-welded springs 46 respectively. The tips of the rods 47 are pivoted at the lower angles of triangular driving link plates 48 made in a large size for centering a vacuum interrupter operating mechanism. The another angles of the linking plates 48 are pivoted at holding metals, and the remaining angles are pivoted at the free ends of movable lead operation rods 50 of the vacuum interrupters 26. Furthermore, the other ends of auxiliary levers 62 whose one ends are pivoted at the holding metals are pivoted at the free ends of the operation rods 50 to carry out the up and down movement of the operation rods 50 smoothly by rotating the driving link plates 48 of a large rotation radius.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application This invention relates to a vacuum breaker having a cass insulation structure and capable of handling a small amount of power.

B. Summary of the Invention The present invention is a small-capacity type vacuum breaker incorporating a gas insulated structure, which is integrally installed in the opening of a casing such as a gas insulated Kiko vehicle to maintain airtightness by welding the periphery. A box-shaped operating shaft storage box is installed on the mounting partition, and the closing spring operating shaft is rotatably supported and installed on the outside air side side of the mounting partition.
One end of the closing spring is attached so that the closing spring operating shaft can be rotated half a turn in a predetermined direction by applying force, and a closing cam is installed on the closing spring operating shaft so that it rotates integrally. A motor is installed to drive the ratchet wheel back and forth to intermittently feed the pawl, and a rod-like loading hook lever that protrudes laterally is installed on the closing spring operating shaft, and the free end of the loading hook lever is installed. is removably supported by a loading hook, and a cutoff spring operating shaft is rotatably supported and installed on the side surface of the mounting bulkhead on the outside air side. A rod-like trip hook lever is provided, the free end of the trip hook lever is removably supported by the trip hook, and a horizontal protrusion is provided on the cutoff spring operating shaft at a corresponding position that can be linked to the closing cam. Install the rod-like input cam receiving lever, install a cutoff spring so that the cutoff spring operating shaft can be rotated by a predetermined angle with applied force, and install a link plate for interlocking on the cutoff spring operating shaft. It is rotatably supported by a through bearing and a closed bearing with an airtight structure, which are installed on both side end plates of the operation shaft storage box, on the insulating gas-filled side surface of the mounting bulkhead. Install the operating shaft that will be
A link plate is provided at the outwardly protruding end of the operating machine shaft from the through-bearing, and this link plate is connected and interlocked with the link plate, and at a predetermined location in the operating shaft storage box of the operating machine shaft,
A pressure contact spring lever in the form of a support rod is installed to protrude laterally, and a drive link plate is connected to the free end of the pressure contact spring lever via the pressure contact spring and an insulating rod so as to rotate a predetermined angle in conjunction with the drive link plate. Since the operating rod of the vacuum interrupter is operated in conjunction with the rotating movement of the drive link plate, the ring part for maintaining airtightness is made to be highly reliable than the rotating ring part of the through bearing, and the sole length can be reduced. By making it as short as possible, we dramatically improved airtight reliability.Furthermore, as the drive operation mechanism for the vacuum interrupter, we configured the lever fixed to the operation shaft to be directly linked to the cam, etc., so the mechanism configuration was This design simplifies and downsizes the system and improves long-term operational reliability.

C1 Prior Art Today, circuit breakers of various types and capacities are used in power systems from power plants to the end of loads to open and close electrical circuits.

Conventionally, such circuit breakers include small-capacity circuit breakers used for power receiving equipment in buildings, etc., and such small-capacity circuit breakers use vacuum switches (vacuum interrupters). There is a vacuum breaker.

This vacuum breaker includes a vacuum interrupter, which is a breaker sealed in a high vacuum, a drive mechanism for turning on and off the vacuum interrupter via an insulating rod, and a drive mechanism connected to the vacuum interrupter. It is equipped with main circuit terminals, disconnecting parts, etc.

Furthermore, the main circuit terminal portion and the disconnection portion connected to the bus bar are covered with an insulating member to prevent short circuits and the like.

D. Invention or problem to be solved With the conventional vacuum breaker as described above, there is no problem with its insulation when used in a low humidity environment, but when used in a hot and humid environment such as in Southeast Asia, for example, Corona discharge begins to occur between the main circuit conductor portion of the vacuum breaker and the insulating member surrounding it, and if this condition continues, there is a problem in that a major short circuit may eventually occur.

Furthermore, even in high temperature and humid environments, if a gas circuit breaker is used, the conductor part is sealed in a gas-insulated cubicle, so there is no problem with insulation, but conventional gas-insulated structures with vacuum All of the circuit breakers have a large capacity, and there are no vacuum circuit breakers with a gas-insulated structure that can handle small volumes, so there has been a problem in that they cannot meet the demand.

In view of the above-mentioned points, it is an object of the present invention to provide a new gas-insulated breaker that does not cause short-circuit accidents even when used in a high-temperature and humid environment and can handle a small amount of power.

E. Means for Solving the Problems The gas insulated breaker of the present invention has a box-shaped mounting diaphragm that is integrally provided at the opening of a casing such as a gas insulated cubicle by welding the periphery to maintain airtightness. An operation shaft storage box section is installed, and the closing spring operation shaft is rotatably supported and installed on the outside air side side surface of this mounting bulkhead.
One end of the closing spring is attached so that the closing spring operating shaft can be rotated half a turn in a predetermined direction by applying force, and a closing cam is installed on the closing spring operating shaft so that it rotates integrally. A motor is installed to drive the ratchet wheel back and forth to intermittently feed the pawl, and a rod-like loading hook lever that protrudes laterally is installed on the closing spring operating shaft, and the free end of the loading hook lever is installed. A cutoff spring operation shaft is rotatably supported on the side surface of the mounting bulkhead on the outside air side, and a support protruding horizontally is installed on the cutoff spring operation shaft. A rod-shaped trip hook lever is provided, the free end of the trip hook lever is removably supported by the trip hook, and is protruded horizontally at a corresponding position on the cutoff spring operating shaft that can be interlocked with the closing cam. Install a rod-like loading cam receiving lever, install a cutoff spring so that the cutoff spring operation shaft can be rotated by a predetermined angle with applied force, and install a link plate for interlocking on the cutoff spring operation shaft. It is rotatably supported by a through bearing and a closed bearing with an airtight structure, which are installed on both side end plates of the operation shaft storage box, on the insulating gas-filled side surface of the mounting bulkhead. Install the operating shaft to
A link flat plate is provided at the outward protruding end of the operating unit shaft from the through-bearing, and this link plate is connected and interlocked with the link plate, and is laterally protruded at a predetermined location within the operating shaft storage box of the operating unit shaft. A pressure spring lever in the form of a support rod is installed, and the drive link plate is connected to the free end of the pressure spring lever via the pressure spring and an insulating rod so that the drive link plate can be rotated by a predetermined angle. The vacuum interrupter is characterized in that the operating rod of the vacuum interrupter is operated in conjunction with the rotational movement.

F. Function: By configuring it as a double series, the seal part for maintaining airtightness is made highly reliable as the rotary seal part of the through bearing, and the seal base is made as short as possible to dramatically improve the reliability of airtightness. It has the effect of pointing towards the target.

Furthermore, the lever, etc. fixed to the operating shaft of the vacuum interrupter's drive operation mechanism is operated by directly interlocking with the cam, etc., which simplifies the mechanism configuration, reduces the size, and improves long-term operational reliability. play an action.

G. Example Hereinafter, an example of the gas insulated breaker of the present invention will be explained with reference to FIGS. 1 to 5.

FIG. 1 is a longitudinal side view of the main part of the breaker of this example, and 1 is a case of a gas insulating cubicle, the inside of which is filled with S Fe gas, which is an insulating gas.

Furthermore, components of the circuit breaker are arranged on both sides of the mounting partition plate 3, which is integrally removed by welding so as to close the opening 2 of the case 1.

That is, as shown in the schematic perspective view of main parts in FIG. 4, the mounting partition plate 3 that is welded to the rectangular opening 2 of the casing 1 so as to maintain airtightness is a rectangular plate that is one size larger than the opening 2. A rectangular box-shaped operating shaft storage box 4 is integrally formed at the lower part of the shaft.

The mounting partition plate 3 is installed so that the side surface from which the storage box portion 4 protrudes is exposed to the atmosphere, and the side surface facing the outside air has a side surface as shown by a dashed line A in the figure. The vacuum interrupter driving equipment shall be placed on the side surface of the mounting partition plate 3 facing inside the case l (J, dotted line B in the figure).
As shown in the figure, the main circuit equipment, vacuum interrupter, etc. will be installed.

For this reason, as shown in FIGS. 1 to 3, the mounting partition plate 3
A closing spring operating mechanism section 5 and a cutoff spring operating mechanism section 6 are installed on the side face facing the outside air as driving equipment for the vacuum interrupter.

The closing spring operating mechanism section 5 is constructed as follows. That is, a joint piece 9 is fixed to one end of the closing spring operating shaft 8 which is pivotally supported between a pair of support plates 7, 7 protruding from the mounting partition plate 3, and the free end of the joint piece 9 is connected to the closing spring operating shaft 8. One end of the spring 10 is pivotally connected.

Furthermore, a closing cam 11 is provided at the intermediate portion of the closing spring operating shaft 8, and a ratchet wheel 12 is installed next to this.

This ratchet wheel 12 is for configuring a ratchet wheel feeding mechanism, and one end of the ratchet wheel 12 is pivoted at an eccentric position of a rotary shaft portion 14 that is driven to reduce rotation by a planetary gear mechanism of a gear motor 13, and is reciprocated. The free end is connected to this ratchet wheel 12.
It is designed to engage the teeth of the

The closing spring operating shaft 8 portion provided with the ratchet wheel 12 is connected to the arrow C in the figure by a one-way clutch (not shown).
It is designed so that it can only rotate in one direction.

Further, in the middle of the closing spring operating shaft 8, a closing hook lever 16 is installed, which is formed by fixing two small plates so as to project laterally and having a roller follower pivotally attached to their free ends. . This closing hook lever 16 is for preventing the closing spring operating shaft 8 from rotating in the direction of arrow C with its roller follower portion being locked to one end of the loading hook 17.

Further, a tripping hook 18 having an overall cross shape is pivotally attached to the other end of the closing spring operating shaft 8 at its intermediate portion.

This tripping hook 18 is attached to the upper bead portion 18 in the figure.
The free end of a is biased in the direction of the arrow by a tension coil spring I9, and its transverse rod portion 18b is pressed against a stopper 2.0 so as to stop at a predetermined position shown in FIG.
so that it is locked in place.

The cutoff spring operating mechanism section 6 installed in correspondence with the closing spring operating mechanism 5 configured as described above is configured as follows.

That is, two sheets are installed in parallel with the closing spring operation shaft 8 to freely support the cutoff spring operation shaft 21, and are fixed at positions corresponding to the above-mentioned tripping hooks 18 so as to protrude laterally. A tripping hook lever 22 consisting of a small plate and a roller follower is installed.

The roller follower portion of the tripping hook lever 22 is configured to be able to prevent the cutoff spring operating shaft 21 from rotating in the direction of the arrow E in a state in which the roller follower portion of the tripping hook lever 22 is locked to the lower protrusion portion 18c of the tripping hook. .

In addition, the above-mentioned closing cam 11 of the cutoff spring operation shaft 21
An input cam receiving lever 23 consisting of two small plates fixed to protrude laterally and a roller follower is installed at a position corresponding to . The rotation of the input cam 11 kicks the input cam receiving lever 23 so that the cutoff spring operation shaft 21 can be rotated by a predetermined angle in the direction of the arrow F.

Further, one end portion of a small plate-shaped spring lever 24 is fixed to the cutoff spring operating shaft 21 so as to protrude in the lateral direction.

A cutoff spring 25 is attached to the other end of the spring lever 24.
One end of the spring is engaged to urge the cutoff spring operating shaft 21 to rotate in the direction of arrow E.

Furthermore, one end of a small link plate 27 for interlocking the operating shaft of the vacuum interrupter 26 is fixed to the left end of the cutoff spring operating shaft 21 in FIG.

One end of a link support rod 28 is pivotally connected to the free end of this laterally protruding link plate 27, and the link support rod 28
The other end is pivotally connected to predetermined parts of a substantially triangular link plate 30 installed at one end of the operating shaft 29.

In this example, the three vacuum interrupters 26, 26, and 26 are installed in the casing 1 of the cass insulation cubicle separated by the mounting partition plate 3. For this reason, the operating machine shaft 29 of the vacuum interrupter operating machine shaft section is installed inside the operating shaft storage box section 4.

Therefore, it is supported by being passed between the through bearings 31 and the closed bearings 32, which are respectively installed on both lateral end plates 4a and 4b of the operating shaft storage box section 4.

=19− In other words, as shown in FIG.
The through bearing 31 that supports one end of the shaft 9 is constructed by combining a bearing cylindrical body 33 and a lock nut body 34. This bearing cylinder 33 has a flange part 33b integrally formed at one end of a hollow cylindrical body 33a, and a lock nut body 34 is screwed into the outer peripheral surface of the cylindrical body 33a. There is a thread groove cut for this purpose.

In addition, after fixing both side end plates 4a, 4b to the mounting partition plate 3 by welding, each side end plate 4a, 4b is attached.
The shaft opening 35 and the plane of its peripheral end surface are precisely machined in a proper position and shape so as to match a predetermined axis line. (In this example, the clearance of the shaft opening 35 is 0.1 m.
m) and the shaft opening 3 of one lateral end plate 4a.
5, as shown in the figure, the cylindrical body 33a of the bearing cylinder 33
is inserted, and with the flange portion 33b in close contact with the periphery of the shaft opening 35, the shaft opening 35 is clamped and fitted with the lock nut body 34 screwed into the bearing cylinder 33, and fixed in a proper position. Note that a ring-shaped groove is cut in the surface of the flange portion 33b that is in close contact with the shaft opening 35, and an O-ring 36 is installed in this portion to maintain airtightness.

Moreover, the hollow circular hole 3 of the bearing cylinder body 33 installed in this way
Bearing 3 is located near the flange in 7.
Install 8. One end of the operating shaft 29, which is passed through the hollow circular hole 37, is fitted into the inner ring of the bearing 38 so as to be rotatably supported.

Further, a ring-shaped gap having a predetermined thickness is formed between the hollow circular hole 37a portion corresponding to the cylindrical body portion 33a portion and the operating device shaft 29. Then, following the washer 39 that presses the free end of the cylindrical body 33a so as to close the gap, a stopper 40 is sequentially placed inside the hollow circular hole 37a, and the distance 4
1 and a SKy gasket 42, a distance 41 is provided between the hair link 38 and the SKy gasket 42 to prevent it from moving in the sliding direction. Make sure to maintain airtightness between.

Note that the operating machine shaft 2 protrudes outward from this through bearing 31.
A spline 29b is formed at one end of the link plate 30, which is inserted through the spline hole in the center of the link flat plate 30 and spline-coupled so that the link plate 30 rotates integrally.
The link flat plate 3 is connected to a distance 65 that is fitted between the stepped portion 29a of the operating shaft 29 and the inner ring end of the bearing 38.
0, and the holding plate 66 is secured with a bolt 67.
to secure it so that it does not move in the thrust direction. By firmly fixing the link flat plate 30 in this way, the contact condition with the damper 63 or stopper 64 is stabilized during operation of the link flat plate 30, and by making the contact point constant, this member has a long life. It is possible to aim for

Further, the other end of this operating machine shaft 29 is connected to the other lateral end plate 4b.
It is supported by a closed bearing 32 installed in.

This closed bearing 32 is constructed by combining a bearing bolt body 43 and a lock nut body 34. This bearing bolt body 43 is a large bolt-like member having a threaded groove on its outer periphery and a bottomed shaft hole 44 bored along its axis. .

Then, the shaft portion 43a of this bearing bolt body 43 is passed through the shaft opening 33 of the other lateral end plate 4a, and the flange portion 43a is passed through the shaft opening 33 of the other side end plate 4a.
b is in close contact with the periphery of the shaft opening 35, and the shaft portion 4
The lock nut body 34 is screwed into the nut 3a and fitted into the shaft opening 35 in the proper position.

Note that a ring-shaped groove is cut in the surface of the flange portion 33b that is in close contact with the shaft opening 35, and an O-ring 34 is installed in this groove to maintain airtightness.

Also, the shaft hole 44 of the bearing bolt body 43 installed in this way
A bearing 38 is installed inside, and a stepped shaft portion 29λ at the other end of the operating machine shaft 29 is fitted into the inner ring of the bearing 38, so as to be freely rotatably supported.

As mentioned above, the through bearings 3 are inserted into the shaft openings 3j and 35 which are opened at appropriate positions in both the lateral end plates 4a and 4b, respectively.
1 and the closed bearing 32 are installed.
Centering of the operating machine shaft 29 supported at both ends thereof can be performed extremely accurately and easily.

Pressure contact spring levers 45, 45, and 45 are installed at three predetermined intermediate positions of the operating machine shaft 29 installed in the operating shaft storage box 4, respectively, and project from the shaft rod in a right angle direction.

Each pressure contact spring lever 45 has a pressure contact spring 46.
Connect integral insulating rod 47 via.

The distal end of this integrated insulating rod 47 is pivotally connected to one lower corner of a triangular drive link plate 48 which is enlarged for centering the vacuum interrupter operating mechanism. The other corner of the drive link plate 48 is pivotally connected to the support fitting 49, and the remaining corner is pivotally connected to the free end of the movable reed operating rod 50 of the vacuum interrupter 26. Along with this,
One end of the auxiliary lever 62 is pivotally connected to the support fitting 49, and the other end of the auxiliary lever 62 is also pivotally connected to the free end of the operating rod 50. To enable smoother vertical movement.

Each vacuum interrupter 26 operated in this way
Install it on the mounting partition plate 3 as shown in the figure.

That is, in order to avoid providing a communication hole with the outside in the mounting partition plate 3, a flat plate-shaped auxiliary support plate 51 is fixed at a predetermined interval on the inner side surface of the case.

Then, each insulator 52 positioned using the positioning pin 58 is screwed onto this auxiliary support plate 51, and upper and lower support fittings 49, 53 are screwed onto each insulator 52, respectively.

An upper conductor 54, which is a main circuit conductor, and the upper part of the vacuum interrupter 26 are screwed and connected to the upper support fitting 53 in the figure. Note that the upper support metal fitting 53 and the lower support metal fitting 49
An insulating support plate 59 is provided between the two to create a reinforcing structure.

In addition, a contact case 56 is screwed onto the lower support fitting 49 in the figure, and together with this, a lower conductor 55 which is a main circuit conductor is connected via a distance 61 which is a reinforcing insulator.
Secure with screws. The upper and lower conductors 54,55 are
Annealing is performed to prevent the reaction force due to an error in connecting the conductor on the panel side (not shown) from being transmitted to the pole side. Further, the lower conductor 55 is configured so that its outer circumferential portion is connected to a magnetic field generating coil 60 that makes one turn over a range of 60 mm above and below the contact portion of the vacuum interrupter 26, so that arcing during opening and closing operations can be prevented. It is meant to be annihilated.

Further, when screwing the main circuit conductor, as shown in FIG. 5, a bolt with a round head is used as the required bolt 57, thereby improving the insulation effect. In addition, components such as the drive link plate 48, auxiliary lever 62, and bolts are accommodated in the inner part of the lower support metal fitting 49, and projections are provided on the outer side of the lower support metal fitting 49, which are important in terms of withstand voltage. It has a structure that is advantageous in terms of voltage resistance and prevents objects from coming out.

Furthermore, in order to round the corners of the necessary support fittings 53 and the like to provide a creepage distance and improve the insulation effect, they are formed into a rounded shape as a whole by using a casting or the like.

As mentioned above, the mounting bulkhead 3 (with the vacuum interrupter 26, its operating mechanism, and main circuit conductor section installed over both side surfaces thereof) is installed in the opening of the casing l as shown in FIG. 2, and the periphery of the mounting partition plate 3 is fixed by welding to maintain airtightness at this welded portion.

Therefore, the airtight knot portions for the insulating gas are limited to the through bearing 31 and the closed bearing 32, making it possible to shorten the seal length of the entire instrument as much as possible and improve the airtight performance.

Next, the operation of the circuit breaker of this example configured as a double circuit will be explained with reference to FIG.

In the state shown in FIG. 3, the vacuum interrupter 26 is in the closing state, and the closing spring IO is in the charged state.

In order to shift from this closed state to the cut-off state, the horizontal protrusion 18d of the tripping hook 18 is pushed in the direction of arrow G.

Then, the cutoff spring 25 and pressure contact spring 46 in the stored state
The tripping hook 18 that was holding down the reaction force is shown by the arrow ■ in the figure.
] Rotate clockwise as indicated by
disengage with.

Then, the cutoff spring operating shaft 21 becomes free to rotate.
Due to the tensile force of the cutoff spring 25 in the direction of the arrow 1, it rotates together with the link plate 27 in the direction of the arrow E, thereby pulling the link support rod 28 interlocked with the link plate 27. Further, the link flat plate 30 is rotated in the direction of arrow J.

As a result, the operating machine shaft 29 rotates in the direction of arrow J together with the link flat plate 30. Then, the pressure contact spring levers 45, 45, 45 for the three phases installed on the operating shaft 29 rotate in the directions of the arrows and ■, and the pressure contact springs 46, 46, 46 respectively
Pull each insulating rod 47.47.47 in the direction of the arrow through. In conjunction with this operation, each drive link plate 48 rotates in the direction of the arrow around its pivot shaft 48a,
Together with the symmetrical rotation of the auxiliary lever 62 at this time, each operating rod 50 is pulled down in the direction of arrow M,
This is to cause the vacuum interrupter 26 to perform a cutoff operation.

In this cutoff state, both the cutoff spring 25 and the press spring 46 are in a released state.

Next, the case of closing from the above-mentioned cut-off state will be explained. In this cut-off state, the closing spring 10 is in a stored state, and its reaction force is supported by the closing hook 17. At this time, when the charging hook 17 is pushed up in the direction of the arrow N and rotated, the lock between the charging hook 17 and the charging hook lever 16 is released, and the pressing force of the charging spring IO causes the charging spring to The operating shaft 8 and the input cam 11 integrated therewith are rotated approximately half a turn in the direction of arrow C. Therefore, the input cam 11 kicks the input cam receiving lever 23 and rotates in the direction of arrow F. As a result, the spring lever 24 also rotates in the direction of the arrow F, and the cutoff spring 25 is pulled down in the direction opposite to the arrow I to store energy. moreover,
The link plate 27 also rotates in the direction of arrow F, pushes down the link support rod 28, and rotates the link plate 30 in the opposite direction to arrow J.

Therefore, in conjunction with the rotation of the link flat plate 30, the operating shaft 29 and each press spring lever 45 rotate in the direction opposite to the arrow J, and each insulating rod 47 is rotated via each press spring 46.
Push in the opposite direction of the arrow.

As a result, the pair of driving link plates 48 and the auxiliary lever 62 rotate symmetrically, pushing up the operating rod 50 in the direction opposite to the arrow M, thereby causing the vacuum interrupter 26 to be closed. In addition,
When the closing cam lever 23 is pushed down to the lowest position by the loading cam 11, the tripping hook 18 automatically engages with the tripping hook lever 22 to maintain the closing state. When this closing operation is completed, the pressure contact with the cutoff spring 25 is λ
The spring 46 is in a biased state and the reaction force is released so that the hook 18 locks and supports the hook 18, and the closing spring 10 is in a released state.

Therefore, in order to prepare for the next closing operation, the 11 energy storage operation is performed when closing.

This (by driving the J1 geared motor 13,
4, the pawl 15 is reciprocally linked, and the ratchet wheel 12 is intermittently fed in the direction of arrow C, from the lowest point position of the joint piece 9 to a predetermined position slightly around its top dead center position. The closing spring 10 is elastically deformed by the amount of displacement of the joint piece 9 to store energy. In this energy storage state, the input hook lever 16 is automatically locked with the input hook lever 16.
The state shown in FIG. 3 is reached.

During the intermittent feeding operation of the pawl 15, a one-way clutch (not shown) in the bearing portion prevents the pawl 15 from reversing from the maximum feed position of each tooth of the ratchet wheel 12 until the pawl 15 engages with the next tooth.

In addition, the current flow in the closed state of this breaker is
The result will be as shown by the arrow in the figure.

H1 Effects of the Invention As detailed above, according to the gas insulated breaker of the present invention, the drive equipment of the vacuum interrupter, the main circuit equipment, the vacuum interrupter, etc. In addition, the mounting bulkhead with the components attached was welded and fixed around the entire circumference to the opening of the case to maintain airtightness. ,
Since the rotary seal portion of the through bearing is made highly reliable and the seal length is made as short as possible, the airtight reliability can be dramatically improved.

Furthermore, as the drive operation mechanism for the vacuum interrupter, we have abolished the commonly used trouble link mechanism, the free trip mechanism, and configured the lever, etc. fixed to the operation shaft to be directly linked to the cam, etc. This has the effect of simplifying the mechanical configuration, reducing the size, and improving long-term operational reliability.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view showing one embodiment of the gas insulated breaker of the present invention, Fig. 2 is an enlarged front view thereof, Fig. 3 is a diagram of its mechanical configuration, and Fig. 4 is a schematic diagram of its main parts. The perspective view and FIG. 5 are enlarged vertical cross-sectional views of essential parts showing the seal structure. =36- 1. Case, 2.Opening, 3..Several partition plates, 4. Operating shaft storage box, 8. Closing spring operating shaft, 10. Closing spring, 11-
Closing cam, 12 Pawl wheel, 15... pawl, 17 ・ Closing hook, 18 Tripping hook, 21 Shut-off spring operation shaft, 25 Shut-off spring, 26 Vacuum interrupter, 27 ・
Link plate, 29・Operator shaft, 31・Through bearing, 32
Closed bearing, 42... Packing, 46... Pressure spring, 47
Insulation lot, 49 Supporting metal fittings, 52・Stonestone, 53・
Supporting metal fittings, 54... Upper conductor, 55 - Lower conductor, 56
・Contact case, 62 auxiliary lever. 1----Kazumasa/#X29----Yako's fake glaze 11---
-One input force A 37----Shinkumonrei 12-----θme single 38-----
-'Y Asong 13---171ta
39-----Once gold Figure 1 ML front cover/] side V Cabinet\°'5゜17-----Insertion fufu 44-----
Single axis bill 18-----Holding hook 45
------H11X old lever-19-----G 1 tension coil 1 gear 46------Pressed 24 years ago
------1 Cell lever 50----
Issou Yoko Lsu 852S 彎 1 +'z160 C (彡) 1・'1

Claims (1)

[Claims] (1) Opening of enclosure (1) of gas insulated cubicle, etc.
A box-shaped operation shaft storage box part (4) is installed on the mounting bulkhead (3), which is integrally provided with the surrounding area welded to keep the airtightness of the mounting bulkhead (2), and the outside air side of the mounting bulkhead (3). A closing spring operating shaft (8) is rotatably supported and installed on the side surface, and a closing spring (10) is installed so that the closing spring operating shaft (8) can be rotated half a turn in a predetermined direction by applying force. Furthermore, a closing cam (11) is installed on the closing spring operation shaft (8) so as to rotate integrally with the closing spring operating shaft (8), and a ratchet wheel (1
2), and then the ratchet wheel (12) and the ratchet (15).
A motor (13) is installed that reciprocates and feeds intermittently, and the closing spring operation shaft (8) is provided with a horizontally protruding rod-like loading hook lever (16). ) is removably supported by a charging hook (17), and a cutoff spring operating shaft (21) is rotatably supported on the outside air side side surface of the mounting bulkhead (3). A horizontally protruding rod-like tripping hook lever (22) is provided on the cutoff spring operation shaft (21), and the tripping hook lever (22)
22), the free end of which is removably supported by a tripping hook (18), and the closing cam (11) of the cutoff spring operation shaft (21).
) is provided with a laterally protruding rod-like input cam receiving lever (23) at a corresponding position that can be interlocked with the cam lever (23), and is configured to rotate the cutoff spring operating shaft (21) by a predetermined angle with an applied force. A spring (25) is installed, and a link plate (27) for interlocking is installed on the cutoff spring operation shaft (21), and the operation is performed on the side of the insulating gas filled side of the mounting partition plate (3). Inside the shaft storage box part (4), both lateral end plates (4a),
An operating machine shaft (29) rotatably supported by a through bearing (31) and a closed bearing (32) having an airtight structure, respectively installed in (4b), is installed, and the operating machine shaft (29) is A link flat plate (30) is provided at the outwardly projecting end of the through bearing (31), and the link flat plate (30) is connected and interlocked with the link plate (27), and the operating machine shaft (29) , a rod-shaped press-contact spring lever (
45), and the drive link plate (48) is interlocked with the free end of the pressure contact spring lever (45) via the pressure contact spring (46) and the insulating rod (47) to rotate a predetermined angle. A gas insulated breaker characterized in that the operation lever of the vacuum interrupter (26) is operated in conjunction with the rotating operation of the drive link plate (48).