JPS648885B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a vacuum valve.

Conventionally, in a power distribution board, a fixed type or a drawer type circuit breaker is incorporated into the panel. The circuit breaker incorporated in this power distribution board is formed by combining and integrating a shutoff section corresponding to a valve in a vacuum circuit breaker, and an operation mechanism section that opens and closes this shutoff section. This is to meet the requirements for maintenance and inspection of the circuit breaker.

However, recently, as a result of improved reliability of the interrupting section of the circuit breaker, maintenance and inspection are no longer necessary until the end of the service life of the interrupting section. Therefore, there is no longer a need for the conventional method of incorporating a circuit breaker that integrates a circuit breaker and an operating mechanism into a switchboard, that is, to form the circuit breaker and the panel body of the switchboard independently of each other. Ta. Also, recently,
In order to meet the demands for downsizing and cost reduction of power distribution boards, there has been a need for circuit breakers that can be organically integrated with power distribution boards.

The present invention has been made in view of the above circumstances, and its purpose is to separate a circuit breaker into a circuit breaker and an operating mechanism, so that each can be incorporated into a switchboard separately, and the operating mechanism is housed in a single box. It is an object of the present invention to provide a vacuum circuit breaker which is housed in a vacuum circuit breaker, is compact, and is easy to handle and install.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, the interrupting portion of the vacuum circuit breaker 1 is located between a horizontal partition wall 202 that partitions the cable room 201 below the switchboard 200 and a horizontal partition wall 204 that partitions the busbar room 203 above the switchboard 200. 2 is fixedly installed. Further, the operating mechanism section 3 of the circuit breaker 1 is mounted on a surface corresponding to the front door 205 of a vertical partition wall 206 that partitions the cut-off chamber 4 that accommodates the above-mentioned cut-off section 2, corresponding to the front door 205 of the switchboard 200. It will be permanently installed.

The interrupting section 2 of the circuit breaker 1 has a total of three vacuum valves 5a, 5b, and 5c, one for each of the three phases, and the movable contacts (not shown) of the vacuum valves 5a, 5b, and 5c are directed upward. The conductors 6a, 6b, 6c extending through the partition wall 204 are connected to the conductors 7a, 7a of the busbar chamber 203.
b and 7c, respectively. Also, vacuum valve 5
Conductors 8a, 8b, 8c extending downward are connected to fixed side contacts (not shown) of a, 5b, 5c, respectively, and these conductors 8a, 8b, 8c penetrate the partition wall 202 to connect the cable 9a of the cable room 201. ,9b,
9c, respectively. Vacuum valves 5a, 5b,
Three levers, which will be described later, which are fixed to a horizontally extending cut-off part drive shaft 10 are respectively connected to the movable side contacts 5c, and the operating mechanism part 3 fixed to the partition wall 206 is connected to the drive shaft 10. The three phases of the cutoff section 2 are connected together to provide a collective operating force for the three phases of the cutoff section 2.

Moreover, as shown in FIG. 2, the circuit breaker 1 of the present invention
By firmly connecting the cutoff section 2 to the cutoff chamber 12 filled with gas, the switchboard can be further miniaturized.
In this case, the operating force of the operation mechanism section 3 fixedly installed outside the cutoff chamber 12 is applied to the cutoff section 2 via the drive shaft 10 connected to a shaft passing through the gas-sealed partition wall 206, as will be described later. given to. Blocking chamber 1
2 is vertically partitioned by a horizontal partition wall 202 that partitions the cable room 201 of the switchboard 200 and a horizontal partition wall 204 that partitions the busbar room 203, as in the case described above.

As shown in detail in FIGS. 3 and 4, the breaking section 2 of the circuit breaker 1 described above has three insulators 22a and 22b mounted on an upper horizontal support member 21a forming a breaking section mounting frame 21. , 22c are fixed to the insulators 22a, 22b, 22c, and support members 24a, 24b, 24c are fixed to the insulators 22a, 22b, 22c, respectively.
In addition, three insulators 23a, 23b,
23c is fixedly installed, and these insulators 23a, 23
Support members 25a, 25b, 25c are fixed to b, 23c, respectively. The above-mentioned support members 24a and 25a
The vacuum valve 5a is fixed to the mounting frame 21 so that the upper and lower ends of the vacuum valve 5a are respectively fixed to the mounting frame 21, and the movable contact of the vacuum valve 5a is upward and the fixed contact is downward. . The other two vacuum valves 5b, 5c are similarly fixed to the supporting members 24b, 25b and 24c, 25c, respectively, with their respective movable contacts facing upward and fixed contacts facing downward. Vacuum valves 5b and 5c are fixed to the mounting frame 21. Mounting seats 26a, 26b, 26c, and 26d are provided at four ends of the mounting frame 21 for fixing the mounting frame 21 to a support member (not shown) of a power distribution board. In this way, the interrupter 2 is configured to be fixed to the support member of the switchboard.

A connecting lever is attached to the upper end portions 27a, 27b, 27c of a rod-like member for vertically moving the movable contacts connected to the respective movable contacts of the vacuum valves 5a, 5b, 5c fixed to the switchboard via the mounting frame 21. 28
One movable end of a, 28b, and 28c is connected to each other. These connecting levers 28a, 28b, 28c
are rotatably supported by support members 30a, 30b, 30c fixed to support members 24a, 24b, 24c, respectively, via pins 29a, 29b, 29c. Furthermore, the connecting levers 28a, 28
One end of horizontally extending insulating rods 31a, 31b, 31c is connected to the other movable end of each of insulating rods 31a, 31b, 3
The other end of the lever 1c is connected to the movable ends of levers 10a, 10b, and 10c fixed at three locations on the cutoff drive shaft 10, respectively. This drive shaft 10 is rotatably supported by a mounting frame 21 at both ends thereof. Further, spring seats 32a, 32b, 32c are coaxially fixed to the above-mentioned insulating rods 31a, 31b, 31c, and the spring seats 33a, 33a fixed to the mounting frame 21, 33b, 33
Contact springs 34a, 34b, 34c are stretched coaxially with the insulating rods 31a, 31b, 31c, respectively.

By rotationally driving the drive shaft 10 described above by an operating mechanism described later, the levers 10a, 10
The movable contacts of the vacuum valves 5a, 5b, 5c are moved up and down through the insulating rods 31a, 31b, 31c, and the connecting levers 28a, 28b, 28c, respectively, to open and close the three phases at once. Further, the contact springs 34a, 34b, and 34c apply contact pressure between the movable and fixed contacts of the vacuum valves 5a, 5b, and 5c, respectively.

A shaft 36 is connected to the above-mentioned shutoff unit drive shaft 10 via a coupling ring 35 that absorbs misalignment of the shaft center, and this shaft 36 is connected to an O for gas sealing as necessary.
It passes through the bulkhead 206 of the switchboard via a flange 37 into which a ring can be installed and is connected to the shaft 39 via a coupling ring 38 outside the disconnection chamber 4 . This shaft 39 is rotatably supported by a support member 41 fixed to an operating device box 40 that houses an operating mechanism to be described later. Further, a connecting rod 42 that extends downward is fixed to the shaft 39, and a long hole 42a at the lower end of the connecting rod 42 is fixed to one movable end of an L-shaped lever of the operating mechanism section 3, which will be described later. The pins fitted together connect the connecting rod 42 and the L-shaped lever.

Next, the operating mechanism section that applies operating force to the above-mentioned cutoff section 2 will be described in detail.

As shown in FIGS. 3 and 5, mounting seats 40b for fixing the operating device box 40 to the panel body of the switchboard are provided at the four ends of the outer surface of the side plate 40a of the operating device box 40 that accommodates the operating mechanism section. 40c, 40d, 40e
will be permanently installed. A mounting plate 43 is fixed to the outer surface of the side plate 40f of the operating device box 40, and a geared motor 44 for urging a closing spring, which will be described later, is fixed on the mounting plate 43. This geared motor 44
A shaft 49 of a worm gear 48 whose both ends are supported by two bearings 46 and 47 fixed on a mounting plate 43 is connected to the rotating shaft 45 of the worm gear 48 via a clutch 50. A wheel gear 51 meshes with the worm gear 48, and a shaft 52 of the wheel gear 51 passes through the mounting plate 43 and the side plate 40f and is rotatably supported by the mounting plate 43. Mounting plate 43 for shaft 52 of this wheel gear 51
A lever 53 is fixed to the end that penetrates the side plate 40f and reaches the inside of the operating device box 40, and a roller 54 is rotatably supported at the free end of the lever 53.

Further, as shown in FIGS. 3 and 6, a closing operation lever 56 is fixed to a shaft 55 whose both ends are rotatably supported by the side plates 40a, 40f of the operating device box 40. It is supported by the operating machine box 40 so as to be rotatable about a shaft 55. A pin 57 is fixed to the lower end of the input operation lever 56, and this pin 57 and the side plate 40g of the operation device box 40
A closing spring 59 is stretched between the closing spring hook 58 fixedly attached to the closing spring hook 58, and the closing operation lever 56
The force is applied in the clockwise direction in FIG. 6 with the center at . Furthermore, a roller receiver 60 is fixedly installed on the upper part of the input operation lever 56, and when the input operation lever 56 is in the state shown in FIG. is brought into contact with this roller receiver 60 as shown in FIG. 12 by the rotation of the lever 53. Subsequently, the lever 53 is rotated counterclockwise by the geared motor 44 as shown in FIG. 13, so that the roller 54 slides on the roller receiver 60 while pushing the lower surface thereof. Then, the closing operation lever 56 is rotated counterclockwise in FIG. 6 against the tension of the closing spring 59, and the closing spring 59 is biased.

A roller 61 is rotatably supported in a portion above the engaging portion of the input operation lever 56 with the shaft 55, and a protruding portion 62c of a horizontal lever 62, which will be described later, rests on this roller 61. Further, a roller 63 is rotatably supported at the upper end of the input operation lever 56. In order to bias the closing spring 59, the geared motor 4
4 to rotate the closing operation lever 56 in the counterclockwise direction in FIG. 64a fits into this roller 63, the input operation lever 56
is latched with the closing spring 59 biased.

The input command link 64 is fixed to a shaft 66 rotatably supported by a shaft support 65 fixed to the operating machine box 40 . A handle (not shown) is fitted to the end of the shaft 66 that passes through the shaft support 65 and reaches the outside of the operating box 40, so that the shaft 66 can be manually rotated. Operation lever 5
The circuit breaker can be closed by disengaging the closing operation lever 56 and unlatching the closing operation lever 56. On the other hand, a plunger 68 of a make command magnet 67 supported by the operating box 40 is rotatably supported at the other free end of the make command link 64 via a pin 69. The input command link 64 is
When the closing command magnet 67 is energized and the plunger 68 is driven rightward in FIG. 6, it rotates clockwise in FIG. 6 and the closing operation lever 56 is unlatched.

Next, the horizontal lever 62, the L-shaped lever 70,
The configuration of the trip mechanism including the slide link 71 and the roller receiving lever 73 will be explained.

When the circuit breaker is in the closed state, as shown in FIGS. 6, 7, and 8, the ends 62b of the frame 62a forming the lever 62 are attached to the side plates 40a, 40f of the operating box 40. A protrusion 62a fixed to a rotatably supported shaft 72 and continuous to the other end of the frame 62a rests on the roller 61 supported by the above-mentioned input operation lever 56. Therefore, the horizontal lever 62 rotates about the shaft 72 as the input operation lever 56 rotates.

In addition, a roller receiving lever 73 formed of a frame body
is surrounded by a frame 62a forming the horizontal lever 62, and its end is rotatably supported along with the horizontal lever 62 by a shaft 72, and is rotatably supported by the operating device box 40. A shaft 74 is fixed to the free end of the roller receiving lever 73, and both ends of the shaft 74 pass through an elongated hole 62d provided in the frame 62a of the horizontal lever 62 surrounding the roller receiving lever 73. A spacer 75 is fitted to the end of the shaft 74 that reaches the outside of the frame 62a. Further, a shaft 76 is fixed to the free end of this roller receiving lever 73.
A roller 77 is rotatably supported inside a frame forming a roller receiving lever 73 at 6.
A roller support 78 is rotatably supported. A shaft 79 is supported on the upper part of this roller support 78, and a roller 80 whose peripheral surface is in contact with the above-described roller 77 is rotatably supported on this shaft 79. Furthermore, both ends of the shaft 76 that reach the outside of the frame forming the roller receiving lever 73 are attached to a slide link 7, which will be described later.
A long hole 71a provided in the lower part of the frame forming 1
penetrate. A pin 81 is fixed to the lower free end of the roller support 78, and a spring 83 is tensioned between this pin 81 and a pin 82 fixed to the lower part of the roller receiving lever 73. As a result, the roller support 78 is biased in the counterclockwise direction in FIG.

The slide link 71 is formed of a frame whose side surface is in the shape of an inverted U (Fig. 8), and as described above, the shaft 76 fixed to the roller receiving lever 73 passes through the long hole 71a at the bottom thereof. , engages with the roller receiving lever 73. Furthermore, both ends of a shaft 84 are supported by the frame forming this slide link 71, and a roller 85 is rotatably supported by the shaft 84 inside the slide link 71, and a roller support 86 is rotatably supported. be done. A shaft 87 is supported at the lower free end of this roller support 86, and a roller 88 whose circumferential surface is in contact with the above-described roller 85 is rotatably supported on this shaft 87. Further, a pin 89 is fixed to the upper free end of the roller support 86, and a spring 91 is tensioned between this pin 89 and a pin 90 fixed to the frame of the slide link 71. As a result, the roller support 86 is urged in the clockwise direction in FIG.

As described above, the elongated hole 71a of the slide link 71
The shaft 76 supported by the roller receiving lever 73 passes through the shaft, and the roller 80 is supported by the roller support 78 supported by the shaft 76, and the roller support 86 supported by the slide link 71 by the shaft 84. The slide link 71 and the roller receiving lever 73 engage with each other due to the circumferential contact between the supported roller 88 and the roller receiving lever 73 .

A tripping member 92 is supported by the slide link 71 . This tripping member 92 is a tripping metal fitting 9
3 is supported so as to be movable in the left-right direction along a cylindrical guide fitting 94 fixed to the slide link 71. Further, a spring 95 is stretched between the flange portion of the tripping fitting 93 at the left end in FIG. 7 and the supporting portion of the guide fitting 94 of the slide link 71.
5 urges the tripping fitting 93 to the right in FIG. 7, and a contact pressure is applied so that the right end surface of the tripping fitting 93 in FIG. 7 comes into contact with the circumferential surfaces of the rollers 80 and 88.

As shown in FIG. 6, this tripping member 92 is opposed to a plunger 97 of a tripping magnet 96 fixed to the operation box 40, and when the tripping magnet 96 is excited, the plunger 97 is activated. 6, and the tripping fitting 93 is pushed to the right in FIG. As a result, roller 80
and roller 88 are pushed to the right, and the roller support 78 and roller support 86 are bent into a dogleg shape from the input state in which the lower roller support 78 and the upper roller support 86 are substantially in a straight line. It becomes a shut-off state. In addition, the manual trip shaft 98 is connected to the operating machine box 40.
By manually rotating the manual trip shaft 98, the free end of the lever 99 fixed to the manual trip shaft 98 moves the plunger 97 as shown in FIG. Push it to the right and push the tripping member 92.

The shaft 7 fixed to the roller receiving lever 73 mentioned above
A roller 100 is rotatably supported inside a frame forming a roller receiving lever 73 at 4. Also,
As shown in FIG. 6, a latch support 101 is fixed to the operating box 40, and the lower end of the latch 103 is rotatably supported by a shaft 102 supported by the latch support 101. A pin 104 is fixed to this latch 103, and a spring 106 is connected between this pin 104 and a pin 105 fixed to the latch support base 101.
is tensioned, and the latch 10 is tightened by this spring 106.
3 is biased counterclockwise in FIG. The latch 103 extends upwardly, and the latch 103 extends upwardly.
There is a stepped portion 103 above the engaging portion with the spring 106 of No. 3.
a is provided, and in the input state shown in FIG. 6, this stepped portion 103a and the above-mentioned roller 100 engage,
The roller receiving lever 73 is held substantially horizontally.
In addition, when the latch 103 is tripped, the upper end surface 10 of the latch 103
3b, the roller 8 is pushed by the tripping member 92.
The peripheral surface of the roller 100 comes into contact with the latch 103 and rotates clockwise in FIG.
The engagement with the stepped portion 103a is removed. Note that a cushion member 107 is fixed to the latch support base 101 described above. This cushion member 107 becomes a stopper when the closing operation lever 56 is rotated clockwise in FIG. 6 by the closing spring 59.

Further, the L-shaped lever 70 is connected to the side plate 4 of the operating device box 40.
The L-shaped lever 70 is rotatably supported by the operating device box 40, with both ends fixed to a shaft 108 supported at 0a and 40f. Furthermore, the L-shaped lever 70
A shaft 109 is fixed to the first free end 70a of the
Both ends of this shaft 109 are rotatably supported by the frame of a slide link 71 surrounding the first free end of the L-shaped lever 70. Further, a spring seat 110 is fixed to the end on the right side in FIG. 6 of the first free end of the L-shaped lever 70 from the engagement part with the slide link 71. A tripping spring 112 is tensioned between a spring seat 111 fixedly attached to the upper side plate 40h. Furthermore, this tripping spring 1
One end of the shaft 113 passing through the spring seat 1
11, and a stopper 114 is fixed to the lower end of the shaft 113, which passes through the spring seat 110 of the L-shaped lever 70. The pin 115 fixed to the second free end 70b of the L-shaped lever 70 fits into the hole 42a of the connecting rod 42, and the rotation of the L-shaped lever 70 causes the drive shaft 10 to rotate. , the contacts of the vacuum valves 5a, 5b, 5c are opened and closed in the manner described above. The L-shaped lever 70 is biased clockwise in FIG. 6 by a tripping spring 112 and is rotated by the vertical movement of the slide link 71. The rotation of the L-shaped lever 70 in the clockwise direction in FIG. 6 is stopped when the first free end of the L-shaped lever 70 comes into contact with the stopper 114.

The operation of the above-mentioned operating mechanism section will be explained below.

When the circuit breaker is in the closed state, as shown in FIG. The horizontal lever 62, the free end of which rests on the roller 61, is held substantially horizontally, and the stepped portion 1 of the latch 103 is held substantially horizontally.
01a is engaged, and the roller receiving lever 73 is held substantially horizontally. Furthermore, the roller receiving lever 73
The roller support 78 supported by the roller support 78 is pulled by a spring 83 and held almost vertically, and the roller support 86 supporting the roller 88 which is in circumferential contact with the roller 80 supported by the roller support 78 is pulled by the spring 91. By being held substantially vertically, the slide link 71 supporting the roller support 86 is pushed upward, and the L-shaped lever 70 is biased counterclockwise in FIG. For this reason, the L-shaped lever 70
the connecting rod 42 connected to the second free end 70b of the
is biased clockwise in FIG. 6, and the shaft 39, coupling rod 42, and shaft 3 are
6, and the drive shaft 1 via the coupling 35.
0 is rotationally driven, and the connecting lever 28a, which is connected to the lever 10a fixed to the drive shaft 10 via an insulating rod 31a, is urged clockwise in FIG. 4, and the connecting lever 28a is free. A rod-like member continuous to the movable contact of the vacuum valve 5a connected to the end is pushed down, and the closed state of the vacuum valve 5a is maintained. Similarly, the lever 1 fixed to the drive shaft 10 is used for the other vacuum valves 5b and 5c.
The connecting levers 28b and 28c connected to the connecting levers 0b and 10c via insulating rods 31b and 31c are energized, and the movable contacts of the vacuum valves 5b and 5c connected to the free ends of the connecting levers 28b and 28c, respectively, are activated. The continuous rod-shaped members are pushed down, respectively, and the closed state of the vacuum valves 5b and 5c is maintained.

When tripping the vacuum valve from the closed state of the circuit breaker described above, the tripping magnet 96 is energized and the plunger 9 is activated, as shown in FIG.
7 is pushed out to the right in FIG.
The second tripping fitting 93 is pushed in, and the rollers 80 and 88 that the second tripping fitting 93 comes into contact with are pushed to the right in FIG. 9, respectively. For this reason, roller 8
The roller support 78 supporting the roller 0 rotates clockwise in FIG. 9 about the shaft 76 supported by the roller receiving lever 73 against the tension of the spring 83. A roller support 8 that rolls and supports a roller 88 by contacting the circumferential surface of the roller support 8
6 rotates counterclockwise in FIG. 9 about the shaft 84 supported by the slide link 71 against the tension of the spring 91. As a result, the roller supports 78 and 86, which support the rollers 80 and 88, respectively, are bent into an inverted dogleg shape in FIG. 9.

By bending the roller support 78 and the roller support 86 with each other, the upper roller support 86 is aligned with the shaft 8.
A slide link 71 supported via the lever 4 is lowered by the bias of a tripping spring 112 via an L-shaped lever 70 that engages with the slide link 71 via a shaft 109. As the slide link 71 descends, the L-shaped lever 70 rotates clockwise in FIG. 9, and the second free end 70 of this L-shaped lever 70
The connecting rod 42 that engages with the shaft 39 rotates in the counterclockwise direction in FIG.
5, the drive shaft 10 is rotationally driven in the counterclockwise direction in FIG. Therefore, the connecting levers 28a, 28b, 28c, which are connected to the levers 10a, 10b, 10c fixed to the drive shaft 10 through insulating rods 31a, 31b, 31c, move counterclockwise in FIG. Rotate this connecting lever 28
The rod-shaped members connected to the free ends of the vacuum valves 5a, 28b, and 28c and continuous with the movable contacts of the vacuum valves 5a, 5b, and 5c are pulled up, and the vacuum valves 5
The movable contacts a, 5b, and 5c are opened.

When performing the above-mentioned tripping operation manually, the manual tripping shaft 98 is manually rotated in the counterclockwise direction in FIG. Press the metal fitting 93. The subsequent operations are the same as described above.

Next, a description will be given of the operation from the cut-off state shown in FIG. 9 to the turn-on standby state.

When the geared motor 44 shown in FIG. 5 is driven to rotate, the worm gear 4 is
8 is driven, and the wheel gear 51 meshing with the worm gear 48 is rotationally driven in the counterclockwise direction in FIG. The lever 5 is fixed to the shaft 52 of the wheel gear 51 by the rotation of the wheel gear 51.
3 rotates counterclockwise in Fig. 9, and the lever 5
The roller 54 supported by the free end of the roller 3 contacts the roller receiver 60 fixed to the input operation lever 56,
The closing operation lever 56 is rotated counterclockwise about the shaft 55.

By this rotation of the closing operation lever 56, the first
As shown in FIG. 10, the closing spring 59 is biased, and the horizontal lever 62, on which the projection 62c rests on the roller 61 supported by the closing operation lever 56, rotates clockwise in FIG. 10 about the shaft 72. Rotate to. Furthermore, since the latch 103 and the roller 100 are disengaged at this time, the rotation of the horizontal lever 62 fixes the shaft 74 that fits into the elongated hole 62d of the frame 62a of the horizontal lever 62. The roller receiving lever 73 rotates clockwise in FIG. 10 about the shaft 72. As mentioned above, at this time, the L-shaped lever 70 is moved to the stopper 11.
Since the slide link 71 is held in contact with the roller receiving lever 73, the rotation of the roller receiving lever 73
While the rollers 80 and 88 are rolling in contact with each other, the roller support 78 rotatably supported by the roller receiving lever 73 is pulled by the spring 83 and rotates counterclockwise in FIG. 10, and the slide link A roller support 86 rotatably supported by the roller support 71 is pulled by the spring 91 and rotates clockwise in FIG.

When the input operation lever 56, which is rotationally driven by the geared motor 44, reaches a predetermined angle, the roller 63 supported at the upper end of the input operation lever 56 immediately before the roller 54 of the lever 53 and the roller receiver 60 are separated. is fitted into the notch 64a of the input command link 64 rotatably supported by the shaft support 65,
The closing operation lever 56 is latched. At this time, the biasing of the closing spring 59 is finished, and the rotation of the horizontal lever 62 and the roller receiving lever 73 is stopped. In this state, the rollers 80 and 88 come into contact with the end surfaces of the tripping metal fittings 93, and the roller supports 78 and 86 are held substantially in a straight line vertically.
Note that the geared motor 44 continues to be driven and is stopped when the lever 53 reaches a predetermined position.
At this time, the operating mechanism section enters the input standby state.

Next, in order to make the injection from the injection standby state shown in FIG. 10, when the injection command magnet 67 is energized, the plunger 68 is pulled to the right in FIG. 64 rotates clockwise in FIG. 10 about a shaft 66. This rotation of the input command link 64 causes the notch 64a of the input command link 64 to
The closing operation lever 56 is disengaged from the roller 63, and the closing operation lever 56 is rotated clockwise in FIG. 10 about the shaft 55 by the tension of the closing spring 59.

To summarize the operation of the means for biasing the closing spring, which is made up of the lever 53, roller 54, and roller holder 60 as described above, in FIG.
0, wheel gear 51 via worm gear 48
is rotated counterclockwise. and shaft 52
rotates, and the lever 53 shown in FIG. 9 is rotationally driven in the counterclockwise direction about the shaft 52. Then, the roller 54 hits the roller receiver 60, and the lever 5
6 is rotated counterclockwise around the shaft 55, and the closing spring 59 is biased.

Note that the function of the elongated hole 62d is related to the generally-called free pull mechanism in the blocked state shown in FIG. When the closing spring 59 is biased with the tripping fitting 93 pushed to the right by the tripping magnet, the roller 6 is rotated counterclockwise about the shaft 55 of the lever 56.
1 comes into contact with the lever 62c, and the lever 62 rotates clockwise around the shaft 72. At this time, since the shaft 74 does not move, the elongated hole 6 provided in the lever 62
Slide inside 2d.

This rotation of the input operation lever 56 causes the protrusion 6 to move onto the roller 61 supported by the input operation lever 56.
The horizontal lever 62 on which 2c rests rotates in the counterclockwise direction in FIG. I was told,
The roller receiving lever 73 moves to the first position around the shaft 72.
Rotates counterclockwise in Figure 0. The rotation of the roller support lever 73 supports the rollers 80 and 88 that are in contact with each other, and also supports the roller supports 78 and 8 that are substantially in a straight line with each other.
6, the slide link 71 is pushed up. As the slide link 71 is pushed upward, the L-shaped lever 70 is rotated counterclockwise in FIG. 10 about the shaft 108, and the trip spring 112 is biased,
The connecting rod 42 connected to the shaped lever 70 is rotated clockwise in FIG. 10 about the shaft 39. As shown in FIGS. 3 and 4, the rotation of the connecting rod 42 causes the drive shaft 10 and the lever 10 to
a, 10b, 10c, insulating rods 31a, 31b, 3
1c, the movable side contacts of the vacuum valves 5a, 5b, 5c are closed via the connecting levers 28a, 28b, 28c, respectively.

When the vacuum valves 5a, 5b, and 5c are closed, as shown in FIG.
comes into contact with the cushion member 107 and stops rotating, and the stepped portion 103a of the latch 103 engages with the roller 100 supported by the roller receiving lever 73, so that the roller receiving lever 73 is held substantially horizontally. Further, a horizontal lever 62 whose free end rests on a roller 61 supported by the input operation lever 56 is held substantially horizontally.

As described in detail above, in the present invention, the cutoff section and the operating mechanism section are configured separately, so that both can be individually and independently arranged on the switchboard. Furthermore, since the shut-off section consists of a vacuum valve and a drive shaft that opens and closes this vacuum valve, the structure of the shut-off section is simple and compact. Since the driving slide link, the electric motor for the closing operation, the tripping means, etc. are housed in a single box, the operation mechanism can be compactly assembled, and therefore handling and installation work can be facilitated. Therefore, the above-mentioned installation work on the switchboard becomes easier and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of a power distribution board equipped with the vacuum circuit breaker of the present invention, FIG. 2 is a side view showing another embodiment of the power distribution board equipped with the vacuum circuit breaker of the present invention, and FIG. 4 is a front view showing an embodiment of the vacuum circuit breaker of the present invention, FIG. 4 is a side view showing an embodiment of the interrupting part of the vacuum circuit breaker of the present invention, and FIG. 5 is an operation of the vacuum circuit breaker of the present invention. Front view showing one embodiment of the machine box, No. 6
FIG. 7 is a configuration diagram showing an embodiment of the operating mechanism section of the vacuum circuit breaker of the present invention, FIG. 7 is a configuration diagram showing an embodiment of the trip mechanism of the operating mechanism section of the vacuum circuit breaker of the present invention, and FIG. 7 is a view taken along arrow A-A in FIG. 7, FIG. 9 is a configuration diagram showing one embodiment of the operation mechanism section when the vacuum breaker of the present invention is in the cutoff state, and FIG. 10 is a diagram showing the vacuum cutoff of the present invention. FIGS. 11 to 13 are front views showing the operation of the lever 53. FIGS. DESCRIPTION OF SYMBOLS 1... Vacuum circuit breaker, 2... Shutoff part, 3... Operating mechanism part, 5a, 5b, 5c... Vacuum valve, 10
... Drive shaft, 21 ... Mounting frame, 28a, 28b,
28c...Connection lever, 40...Operator box, 44
... Geared motor, 59 ... Closing spring, 62 ...
...Horizontal lever, 70...L-shaped lever, 71...Slide link, 73...Roller receiving lever, 7
8, 86...Roller support, 80, 88...Roller, 92...Tripping member, 93...Tripping fitting,
96...Tripping magnet, 97...Plunger, 200...Switching board.

Claims (1)

[Claims] 1. Vacuum valves 5a to 5c and connection levers 28a to 28 connected to movable contacts of the vacuum valves.
c, and a drive shaft 10 that provides a driving force to rotationally drive the connection lever, and a cutoff part 2 supported by a mounting frame formed to be attachable to a panel body of a switchboard, and connected to the drive shaft 10. The connecting lever 42 is connected to a connecting lever 42 that rotates the shaft 39.
a first lever 70, 70a, 70b which rotates the shaft 39 via the first lever to rotationally drive the drive shaft 10;
, a slide link 71 that engages with the free end of this first lever and rotates the first lever by vertical movement, and a first roller support 86 that is supported by this slide link. first roller 8
a second lever 62 supporting a second roller support 78 supporting a second roller 80 in contact with the second lever 62 and closing the contacts of the vacuum valve by pushing up said slide link; The third wheel rotates in the direction of pushing up the slide link.
a lever 56, a spring means 59 that holds a driving force for rotationally driving this third lever, and an electric motor 44 that biases the spring means by rotationally driving this third lever; A tripping member 92 that pushes the first roller support and the second roller support to bend the first roller support and the second roller support in a dogleg shape with respect to each other, and urges the slide link in a direction to pull it down. an operating mechanism section 3 which is supported by a box body formed so as to be attachable to the panel body of the switchboard; A vacuum circuit breaker characterized by being equipped with.