CN103177900A - Spring manipulater used for breaker and breaker - Google Patents

Abstract

The present invention provides a spring operator for a breaker and a breaker, which can not only realize high-speed movement of the contact point of the breaker, but also reduce the number of parts and reduce the size of the operator. In order to solve the above problems, it is characterized in that the driving force of the closing spring (28) for closing the fixed contact (62) and the movable contact (63) of the blocking part (405) is transmitted to the cam (3) , the driving force of the cam (3) is transmitted and the blade part is extended in four directions and installed on the main rod (5) on the main shaft: when the blocking part (405) is turned on, it is connected with the The first roller (6) that the cam (3) contacts; the first pin (5b) that connects the connecting rod (68), the second pin (5b) that connects the blocking spring link (25) that transmits the driving force of the blocking spring (26) The pin (5a), and the second roller (7) that transmits the driving force of the shutoff spring (26) to the shutoff control mechanism (401), transmit and maintain these driving forces in substantially the same plane.

Description

Spring operator for circuit breaker and circuit breaker

technical field

The present invention relates to a spring operator for a breaker and a breaker, and more particularly to a spring operator for a breaker and a breaker suitable for use in high-voltage power such as substations and switching stations of electric power systems.

Background technique

With the increase in capacity of power transmission systems, the breaking capacity of circuit breakers used in substations and switching stations has increased, and high reliability is required. In order to improve the reliability of the interrupter, it is important to simplify the structure by reducing the number of parts.

Generally, a blower-type air circuit breaker is used for a large-capacity circuit breaker. This blower-type air circuit breaker has a structure that discharges gas to eliminate the arc generated during the circuit breaker, and it is known that not only the structure of the circuit breaker is simple , The enclosed insulating gas such as SF ₆ gas has excellent insulation and isolation performance.

The blowing type air circuit breaker includes: a blocking unit filled with SF ₆ gas and having a fixed electrode and a movable electrode; and an operator having a driving source for making the movable electrode contact and separate from the fixed electrode. In the blocking part, the movable electrode and the fixed electrode are provided to face each other, and the movable electrode and the fixed electrode are electrically energized while they are in contact.

Also, when an abnormal current flows in the power system due to, for example, lightning, an interruption command is input to the circuit breaker, and the movable electrode is pulled away from the fixed electrode by the driving force of the manipulator to interrupt the current.

As the driving source of the operator, high-pressure hydraulic pressure, pressurized air pressure, and metal spring are usually used. Among them, the spring operator using metal spring as the driving source can maintain the driving energy stably without being affected by the surrounding temperature conditions, so it is suitable for applications exceeding 300kV. EHV grade.

A conventional spring operator suitable for an air circuit breaker is described in Patent Document 1, for example. The spring operator described in Patent Document 1 is configured as follows.

That is, it includes: a camshaft and a main shaft; a cam provided on one side of the camshaft; a cam that transmits the driving force of the motor to the camshaft and is provided on the other side of the camshaft and is transmitted to a spring. a main gear that transmits the load of the cam and is provided on one side of the main shaft, and transmits the driving force of the on-spring to the blocking spring; a main rod that transmits the driving force of the on-spring Transmission to the buffer device and the driving force of the buffer rod provided on the other side of the main shaft or the contact spring is transmitted to the contact of the switch, and the contact rod provided on the other side of the main shaft , the camshaft is supported on the bracket by a bearing device between the cam and the main gear, and the main shaft is supported by a bearing device between the main rod and the buffer rod or the contact rod on the stand.

【Prior technical literature】

【Patent Literature】

[Patent Document 1] Japanese Patent No. 3823676

In the spring operator described in the aforementioned Patent Document 1, three rods, namely, a main rod, a buffer rod, and a contact rod, are provided for the main shaft. In particular, the main rod is configured in a substantially Y-shape in which the blade portion extends in three directions from the rotation axis. Therefore, the position of the center of gravity of the main rod is located at a predetermined distance from the center of rotation, and the moment of inertia of the main rod around the center of rotation is larger than the moment of inertia around the center of gravity (parallel axis theorem), and the rotational speed of the main rod during the interruption operation May be difficult to increase.

In addition, the driving force acting on the main rod to turn off and on is transmitted to the contact rod through the torsion of the main shaft. Therefore, when the torsional rigidity of the main shaft is small, the transmission loss of the driving force increases and the moving speed of the contact point increases. possibility of decline.

Furthermore, since the rods are arranged at three positions in the axial direction of the main shaft, there is also a problem that the size of the manipulator in the width direction is reduced.

Contents of the invention

The present invention has been made in view of the above points, and an object of the present invention is to provide a spring operator for a circuit breaker and a circuit breaker that can increase the speed of contact movement while improving reliability and reducing the number of parts to achieve downsizing.

In order to achieve the above object, a spring operator for a breaker is characterized in that it includes: a breaking spring and a connecting spring. The movable contact is opened and closed; the cam is transmitted the driving force of the connecting spring through the connecting spring connecting rod; the main rod is transmitted the load of the cam and the driving force of the cam is transmitted; the connecting rod is transmitted through the connecting rod The main rod is transmitted with the driving force of the blocking spring and the connecting spring; the blocking control mechanism holds and releases the driving force of the blocking spring, wherein the blades of the main rod extend in four directions, and On the main rod extending in four directions of the blade part, there are: a first roller contacting the cam when the blocking part is turned on, a first pin connected to the connecting rod, and a transmission rod The second pin connected to the blocking spring link of the driving force of the blocking spring, and the second roller that transmits the driving force of the blocking spring to the blocking control mechanism, and the transmission of the driving force is maintained in substantially the same plane. conduct.

With the above configuration, since the moment of inertia around the rotation axis of the main rod is reduced, the contact of the breaker can be moved at high speed, and the driving force for breaking and making can be transferred to the main shaft without twisting the main shaft. Since the contact side is transmitted, the reliability of the main shaft, the frame supporting the main shaft, and the bearings is improved, and the number of rods connected to the main shaft is reduced, thereby simplifying the structure and reducing the size of the manipulator.

In addition, the present invention is characterized in that the position of the center of gravity of the main rod substantially coincides with the position of the rotational axis of the main rod in addition to the above configuration.

According to this configuration, the same effect as above can be obtained, and the rotation speed of the main rod can be increased.

In addition, the present invention is characterized in that, in addition to the above structure, a buffer device for braking the movable member is arranged on the operating axis of the breaking spring when the closing and closing operations are completed.

According to this configuration, not only can the same effect as above be obtained, but also it is not necessary to provide a rod for connecting the shock absorber to the main shaft, thereby reducing the number of parts.

In addition, the present invention is characterized in that the middle part of the main shaft is rotatably supported by the frame body, one end of the main shaft is connected to the main rod, and the main shaft is rotatably supported by the frame that rotatably supports the main shaft. There is a bearing inside the body.

According to this configuration, while obtaining the same effect as above, the reliability of the main shaft, the frame supporting the main shaft, and the bearings can be improved.

In addition, the present invention has the following features on the basis of the above structure, that is, a square hole or a spline slot hole is formed on the main rod, and a square shaft or a spline shaft is formed on the main shaft, and the main rod It is configured to be detachable with respect to the said main shaft.

According to this configuration, the same effect as above can be obtained, and the main rod can be detached from the outside, and when assembling the main rod to the main shaft, the position in the axial direction can be adjusted to improve the assemblability.

Furthermore, the present invention is characterized in that the shaft end on the opposite side to the end of the main shaft to which the main rod is connected protrudes from the frame, and the non-electrical connection of the circuit breaker is characterized in that, based on the above structure, the shaft end is protruded from the frame. When the instruction is operated, the manual operation mechanism is connected to the protruding protruding portion to perform the breaking and making operations of the contacts.

Specifically, the manual operation mechanism is characterized in that the manual operation mechanism includes: a connecting rod fixed to an end portion of the main shaft, a connecting rod having one end rotatably connected to the connecting rod, and a connecting rod connected to the connecting rod. A hydraulic piston connected to the other end of the hydraulic piston, and a hydraulic cylinder that accommodates the hydraulic piston in a movable manner, the hydraulic piston is moved by introducing high-pressure oil from a hydraulic source into the hydraulic cylinder, and the connecting rod moves along with the movement. The movement causes the connecting rod and the main shaft to rotate, thereby performing the breaking and closing operations of the contacts.

According to this configuration, the same effect as above can be obtained, and it is also possible to operate when the power supply of the substation or the switching station is lost.

In addition, the circuit breaker of the present invention is characterized in that it includes: a circuit breaker for switching on and off electric power by opening and closing a contact composed of a fixed contact and a movable contact; and a spring operator having A breaking spring and a closing spring that open and close the contacts by releasing deformation energy, and the spring operator is any spring operator for a breaker described above.

With such a configuration, the same effect as that of the above-mentioned spring operator for a breaker can be obtained, and since the spring operator for a breaker can be miniaturized, there is an effect that the size of the breaker can be reduced.

【Invention effect】

According to the present invention, since the moment of inertia around the rotation axis of the main rod can be reduced, the contact of the breaker can be moved at high speed, and the driving force of breaking and making can be transmitted to the contact side without twisting the main shaft. Therefore, the reliability of the main shaft, the frame for supporting the main shaft, and the bearings is improved, and since the number of connections to the main shaft is reduced, the structure can be simplified and the manipulator can be downsized.

Description of drawings

Fig. 1 is a first embodiment of a spring operator for a breaker according to the present invention, and is a view showing the spring operator for a breaker in a closed state of an air circuit breaker.

Fig. 2 is a sectional view showing the spring operator of the first embodiment.

Fig. 3 is a diagram showing a spring operator for a breaker in a state where the closing operation of the air circuit breaker according to the first embodiment is completed.

Fig. 4 is a view showing a spring operator for a breaker in a state in which the air circuit breaker of the first embodiment is in the closing operation.

Fig. 5 is a diagram showing a spring operator for a breaker in a state where the closing operation of the air circuit breaker according to the first embodiment is completed.

FIG. 6 is a front view showing an air circuit breaker equipped with a spring operator for a breaker according to Embodiment 1. FIG.

7 is a diagram for explaining the definition of the length of the blade portion of the main rod of the spring operator according to the first embodiment.

Fig. 8 is a diagram showing a manual operation mechanism used for non-electric command operation of the air circuit breaker.

【Symbol Description】

1...frame, 2...camshaft, 3...cam, 4...main shaft, 4a...end of main shaft, 5...main rod, 5a...second pin, 5b...first pin, 6...first roller, 7... The second roller, 8...the second blocking latch, 9, 12, 15, 20...return spring, 10, 13, 18, 21...roller, 11...blocking latch, 14a...blocking trigger, 14b...trigger Rod, 19...connecting the latch, 22...trigger lever, 22a...connecting the trigger, 25...blocking spring link, 25a, 36a...flange, 25b, 77, 79...pin, 26...blocking spring, 27 …connecting spring connecting rod, 28…connecting spring, 35…spring seat, 36…piston, 37…working cylinder, 38…buffering device, 51…pinion gear, 52…big gear, 60…movable side conductor, 61 …fixed side conductor, 62…fixed contact, 63…movable contact, 64…insulator, 65…second lever, 66…rotation shaft, 67…first lever, 68, 78…connecting rod, 70…manual Operating mechanism, 71...Connecting rod, 71a, 71b...Bearing device, 72...Bearing, 73...Anti-detachment member, 74...Hydraulic piston, 75...Hydraulic cylinder, 76...Coupling, 100...Pneumatic circuit breaker, 101, 102 …Sleeve, 103…Earth container, 104…Operation box, 105…Stand, 201…Electromagnet for breaking, 202…Electromagnet for connecting, 211, 212…Push rod, 400…Spring operator, 401…Blocking control Mechanism, 402...on control mechanism, 403...off operation part, 404...on operation part, 405...off part

Detailed ways

Hereinafter, an embodiment of a spring operator for a circuit breaker and a circuit breaker according to the present invention will be described with reference to the drawings.

【Example 1】

First, an air circuit breaker which is an embodiment of the breaker of the present invention will be described using FIG. 6 . As shown in the figure, the cylindrical grounded container 103 of the air circuit breaker 100 is installed on a stand 105 . Insulating gas, such as SF ₆ gas (sulfur hexafluoride gas), is sealed at a predetermined pressure in the cylindrical grounding container 103, and protrudes obliquely upward from the axial middle portion of the cylindrical grounding container 103. There are sleeves 101,102. Conductors that connect electric wires in substations and switching stations to form circuits are housed in sleeves 101 and 102 . In addition, an operation box 104 for accommodating an operation portion of the air circuit breaker 100 is attached to a side portion of the stand 105 .

In the air circuit breaker 100 configured in this way, for example, power is supplied to the sleeve 102 on the upstream side from a system not shown when energized. Then, it is guided from the sleeve 102 to the contact in the ground container 103 and supplied to the system via the sleeve 101 on the downstream side again. For example, when an accident occurs in the system due to lightning or the like, the operator in the operation box 104 is driven to open the contact in the ground container 103 . As a result, the power supply to the downstream side is blocked.

It should be noted that, in this embodiment, the grounding container 103 extends along the horizontal direction, but may extend along the vertical direction. In addition, in the present embodiment, a single air circuit breaker in which the sleeves 101 and 102 are directly attached to the grounded container 103 has been described, but it may be a breaker incorporated in a gas insulated switchgear. In addition, although the gas circuit breaker using SF ₆ gas has been described as an example here, it is self-evident that the present invention can also be applied to the opening and closing of the grounded container 103 which is vacuum or sealed with other gases. device.

Next, the spring operator 400 housed in the operation box 104 shown in FIG. 6 together with the blocking portion 405 in the ground container 103 will be described using FIGS. 1 to 5 .

As shown in FIG. 1 , one end of the fixed contact 62 of the blocking unit 405 is fixedly supported by the cylindrical fixed-side conductor 61 , and the other end is in contact with the movable contact 63 . The contact side of the movable contact 63 and the fixed contact 62 is formed in a cylindrical shape. The movable-side conductor 60 holding the movable contact 63 is supported and fixed in the ground container 103 by an insulating cylinder (not shown). In addition, the opposite end of the contact end of the movable contact 63 which is in contact with the fixed contact 62 is connected to a rod-shaped insulator 64 .

Here, the connection between the blocking unit 405 and the spring operator 400 will be described. The ground container 103 (not shown) has a rotating shaft 66 rotatably supported, and one end portion of each of the second rod 65 and the first rod 67 is fitted to the rotating shaft 66 . The other end of the second rod 65 is connected to the insulator 64 . The other end of the first rod 67 is connected to one end of the link 68 . The other end of the connecting rod 68 is connected with the main rod 5 of the spring operator 400 .

The spring operator 400 includes: a shut-off operation unit 403 having a main shaft and a shut-off spring 26 , a shut-off operation unit 404 having a camshaft 2 and a shut-off spring 28 , and a shut-off control mechanism for holding and releasing the driving force of the shut-off spring 28 402 . The blocking control mechanism 401 for holding and releasing the driving force of the blocking spring 26 . Hereinafter, the configuration of each part of the spring operator 400 will be described.

On the main shaft 4 constituting the shutoff operation part 403 , the main lever 5 and the drop-off preventing member 73 shown in FIG. 2 are attached. The main rod 5 has blades extending in four directions from the rotation axis, and rollers and pins are attached to the ends. That is, on the main rod 5 having blades extending in four directions, the first roller 6 that contacts the cam 3 when the shutoff portion 405 is turned on, the first pin 5b that connects the link 68, and the first pin 5b that connects the link 68 are mounted. The second pin 5 a connected to one end of the shutoff spring link 25 that transmits the driving force of the shutoff spring 26 , and the second roller 7 that transmits the driving force of the shutoff spring 26 to the shutoff control mechanism 401 . In addition, the first roller 6 is in contact with the cam 3 during the ON action, and the second roller 7 is engaged with the second blocking latch 8 in order to maintain the blocking spring force compressed in the ON state by the blocking control mechanism 401. combine.

With the above configuration, it is possible to transmit the driving force for breaking and closing to the contact side, and to transmit the force of the breaking spring to the breaking control mechanism only on the same plane as the ZY plane shown in FIG. 2 .

The other end of the blocking spring connecting rod 25 that one end is connected with main rod 5 is connected with one end of the piston 36 in the buffer device 38 that brakes the movable part when the action of blocking and connecting is completed through pin 25b. A flange 25a is provided on the shutoff spring link 25 near the pin 25b, and the spring force of the shutoff spring 26 acts.

For the above-mentioned buffer device 38, incompressible fluid such as oil and a piston 36 not shown in the drawing are accommodated in a cylindrical working cylinder 37, and a flange 36a is provided on the piston 36, and its outer surface is in contact with the working cylinder. The inner surfaces of 37 are substantially contiguous. The piston 36 moves in the left-right direction in the cylinder 37 in conjunction with the shut-off spring link 25, thereby compressing oil to generate a braking force. In addition, the buffer device 38 is installed in the direction of the operating axis of the blocking spring link 25, so there is no need to provide a rod for connecting with the buffer device 38 on the main shaft 4, thereby reducing the number of components. In addition, since the braking force is transmitted to the contact side via the main lever 5 without twisting the main shaft 4, braking characteristics can be improved.

The ON operation unit 404 shown in FIG. 1 is configured as follows. That is, the large gear 52 and the cam 3 are attached to the camshaft 2, and the camshaft 2 is rotatably supported by a pair of bearing devices 71a, 71b shown in FIG. department. The large gear 52 meshes with the pinion gear 51 , and transmits driving force from a motor (not shown) to the pinion gear 51 . On the outside of the cam 3, one end of the connection spring link 27 is rotatably attached. The other end of the connecting spring link 27 is provided with a spring seat 35 to support the movable end of the connecting spring 28 .

The ON control means 402 is configured as follows. That is, the roller 18 is attached to the vicinity of the largest radius portion of the cam 3 , and the closing latch portion 19 is arranged on the roller 18 so as to be engageable. The on latch portion 19 is substantially V-shaped, and its curved portion is rotatably attached to the shaft. One end portion of the V-shape of the engaging latch portion 19 is formed as a tapered portion, and is engaged with the roller 18 of the cam 3 . A roller 21 is attached to the other end of the V-shape of the ON latch portion 19 , and the trigger lever 22 is arranged so as to be in contact with the roller 21 . A return spring 20 with one end fixed on the frame body 1 is installed in the middle part between the rotation axis of the connecting latch part 19 and the roller 21 . The trigger lever 22 is rotatably mounted on a shaft fixed to the frame body 1 in the middle, and an on trigger 22 a is formed at the end of the on latch 19 opposite to the side abutting against the roller 21 . The push rod 212 of the electromagnet 202 for turning on is arrange|positioned so that contact|abutment is possible on this turning-on trigger 22a.

The blocking control means 401 is configured as follows. That is, on the second roller 7 provided on the main rod 5, the second blocking latch part 8 is arranged in an engaging manner, and the middle part of the second blocking latch part 8 is fixed on the axis fixed on the frame body 1. Installed on it to rotate freely. The second roller 7 of the main lever 5 is engaged with a tapered portion formed at one end of the second blocking latch portion 8 . A roller 10 is attached to the other end portion of the second blocking latch portion 8 , and the blocking latch portion 11 is disposed so as to be engageable with the roller 10 . A return spring 9 of the second blocking latch portion 8 is installed between the shaft center of the second blocking latch portion 8 and the taper portion. One end of the return spring 9 is fixed on the frame body 1 .

The middle portion of the blocking latch portion 11 is rotatably attached to a shaft fixed to the frame body 1 , and the tapered portion formed on one end side can engage with the roller 10 of the second blocking latch portion 8 . A roller 13 is attached to the other end portion of the blocking latch portion 11 . The trigger 14a is disposed so as to be able to engage with the roller 13 . A return spring 12 with one end fixed on the frame body 1 is installed between the shaft center of the blocking latch portion 11 and the taper portion.

The trigger 14a has a substantially L-shape, and has a curved surface portion that abuts against the roller 13 of the blocking latch portion 11 at an end portion in the horizontal direction from the center of rotation. One vertical trigger lever 14 b of the trigger 14 a is configured to be able to contact the push rod 211 of the blocking electromagnet 201 . In addition, a return spring 15 whose end is fixed to the frame body 1 is attached to the other side of the trigger lever 14b.

The second blocking elastic key part 8 and the blocking elastic key part 11, the back-moving springs 9, 12, 15 installed on the blocking trigger 14a are in a compressed state in the connection holding state shown in Fig. 1, and the second blocking elastic key Part 8, blocking latch part 11, and trigger 14a act on the spring force of these return springs all the time.

Hereinafter, the operation of the air circuit breaker 100 of the present embodiment configured in this way will be described.

First, the operation of transitioning from the ON state shown in FIG. 1 to the OFF state will be described. In the ON state of the shutoff part 405, when a shutoff command is input, the air circuit breaker 100 starts a shutoff operation. The blocking electromagnet 201 of the blocking control mechanism 401 is excited, and the push rod 211 of the blocking electromagnet 201 protrudes to press the trigger lever 14b. The trigger lever 14b is pressed by the push rod 211 to rotate clockwise. As a result, the trigger 14a is disengaged from the blocking latch portion 11 .

The blocking latch portion 11 disengaged from the trigger 14a is in a rotatable state. Since the roller 10 of the second blocking latch portion 8 presses the blocking latch portion 11, the blocking latch portion 11 rotates around the shaft 8a. Next, the second blocking latch portion 8 is rotated clockwise by the pressing force from the second roller 7 of the main lever 5 . Thereafter, the engagement between the main lever 5 and the second blocking latch portion 8 is disengaged.

The engagement between the main lever 5 and the second blocking latch 8 is disengaged, so that the main lever 5 is in a freely rotatable state. As a result, the blocking spring 26 is released to rotate the main lever 5 clockwise. The connecting rod 68 connected with the main rod 5 moves upwards, so that the first rod 67 rotates counterclockwise. Along with this, the rotation shaft 66 and the second lever 65 rotate counterclockwise. As the second lever 65 rotates, the insulator 64 and the movable contact 63 connected to the second lever 65 move rightward. As a result, the movable contact 63 separates from the fixed contact 62 to interrupt the contact. In the second half of the blocking operation, the damping device 38 generates a braking force to decelerate the movable part, and the blocking operation ends. At this time, the first roller 6 at the end portion of the main rod 5 substantially abuts against the outer peripheral surface of the cam 3 and stops (see FIG. 3 ).

FIG. 7 shows the symbol definition of the length from the rotation axis of the main shaft 5 (the main shaft 4 ) to the blade portion. As shown in the figure, among blade portions in four directions, the length L _{45 a} from the rotation axis to the first pin 5 b of the link 68 is the longest, and the length L ₄₆ from the axis to the first roller 6 is the shortest. The length L ₄₇ from the rotation axis to the second roller 7 and the length L _45b from the rotation axis to the blocking spring link 25 are substantially equal to L _45a .

Accordingly, in the main shaft 5, the length ratio (L _45a /L ₄₆ ) is set to be 1.4 at the maximum from the rotation axis center to the front ends of the blades in four directions. In this case, although the position of the center of gravity of the main shaft 5 is not directly aligned with the rotation axis, since it is limited within the outer diameter of the main shaft 4, the rotation speed of the main shaft 5 during the breaking operation can be accelerated. In order to maximize the rotational speed, it is only necessary to make the lengths of the vanes in the four directions of the main rod 5 the same.

Next, the operation of the shutoff unit 405 transitioning from the shutoff state shown in FIG. 3 to the on state shown in FIG. 5 will be described.

First, when a closing command is input to the circuit breaker in the breaking state shown in FIG. 3 , the closing electromagnet 202 is excited. Then, the push rod 212 of the electromagnet 202 for turning on protrudes leftward, and presses the turning-on trigger 22a. The pressed trigger lever 22 rotates clockwise, and the engagement between the on latch part 19 and the trigger lever 22 is released. Thereby, the on latch part 19 rotates clockwise by the pressing force from the roller 18 attached to the cam 3, and the engagement between the on latch part 19 and the cam 3 is released. In this way, the movement restriction of the cam 3 is eliminated, so that the spring force of the connection spring 28 is released, and the connection spring connecting rod 27 moves to the left. With the movement of the connecting spring link 27, the camshaft 2 and the large gear 52 rotate clockwise.

As the camshaft 2 rotates, the cam 3 also rotates clockwise. Then, as shown in FIG. 4 , the outer peripheral surface of the cam 3 comes into contact with the first roller 6 of the main lever 5 to rotate the main lever 5 counterclockwise. When the turning-on operation is further performed from the state of FIG. 4 and the cam 3 rotates substantially counterclockwise, the outer peripheral surface of the cam 3 contacts the first roller 6 of the main rod 5 at the portion of the maximum curvature radius of the cam 3 . At this time, the blocking spring link 25 connected to the main rod 5 can compress the blocking spring 26 to a substantially original position.

In addition, the connecting rod 68 is moved downward along with the rotation of the main rod 5 during the ON operation. As a result, the first lever 67 , the rotating shaft 66 , and the second lever 65 rotate in the direction opposite to the breaking operation to perform the closing operation of the contacts (see FIG. 5 ).

According to such a present embodiment, since the contacts are moved without twisting the main shaft 4 even during the turning-on operation, it is possible to increase the speed. In addition, conventionally, a pair of bearing devices are disposed on the housing 1 in order to rotatably support the main shaft 4 , but this can be reduced to a single bearing 72 (see FIG. 2 ).

It should be noted that, in this embodiment, an anti-off member 73 (refer to FIG. 2 ) is connected to the opposite end of the main rod 5 installed on the main shaft 4, but when the non-electric command action is performed, for example, the opposite direction When checking the operation at low speed of the installed air circuit breaker, the manual operation mechanism 70 is connected to the spring operator 400 .

The structure of the manual operation mechanism 70 mentioned above is demonstrated using FIG. 8. FIG. It should be noted that FIG. 8 shows a state in which the closing operation of the air circuit breaker is completed.

In the state in which the shutoff operation of the air circuit breaker shown in FIG. 8 is completed, the connecting rod 71 is fitted into the end 4 a of the main shaft 4 . The fastening of the end portion 4a of the main shaft 4 and the connecting rod 71 may use spline fastening or the like in addition to the fitting of the square shaft and the square hole.

A pin 77 is rotatably supported at one end of the connecting rod 71 and is connected to one end of a connecting rod 78 . The other end of the connecting rod 78 is connected to one end of the hydraulic piston 74 via a pin 79 . The hydraulic piston 74 is housed inside the hydraulic cylinder 75 . The coupling 76 connects piping from a hydraulic pressure source (not shown) to allow high-pressure oil to enter the hydraulic cylinder 75 to move the hydraulic piston 74 to the right in FIG. 8 . Along with this, the connecting rod 78 also moves rightward, and the connecting rod 71 and the main shaft 4a rotate counterclockwise. Thus, in FIG. 3 , since the main lever 5 also rotates counterclockwise, the breaking and closing operations of the contacts are performed.

In this way, in the normal operating state of the air circuit breaker, by separating the manual operation mechanism 70 from the main shaft 4, it is possible to increase the speed of contact movement.

In addition, in this embodiment, the fitting of the main rod 5 and the main shaft 4 is based on a combination of a square hole and a square shaft or a combination of a spline groove and a spline shaft, so the main rod 5 can be easily attached and detached from the outside. In addition, when assembling the main rod 5 to the main shaft 4, the position in the width direction can be adjusted to improve assemblability.

Claims (6)

1. breaker spring operator is characterized in that possessing:

Interdict spring and connect spring, for blocking and the connection of carrying out electric power, this blocking spring and connection spring make fixed contact therefor and the movable contact switching of blocking section;

Cam, it is passed the actuating force of this connection spring via the connection spring link;

Mobile jib, it is arranged on main shaft, is used for transmitting the load of this cam and is passed the actuating force of this cam;

Connecting rod, the actuating force that it is passed described blocking spring and connects spring via this mobile jib;

The blocking controlling organization, its actuating force to described blocking spring keeps, discharges,

Wherein, the blade part of described mobile jib extends to four direction, and have on the described mobile jib that this blade part extends to four direction: when described blocking section carries out ON Action with the first roller of described cam contact, is connected the first pin of described connecting rod, to second selling of connecting of the blocking spring link of the actuating force of transmitting described blocking spring, to the second roller of the actuating force of the described blocking spring of described blocking controlling organization transmission, the transmission of described actuating force, remain on roughly and carry out in the same face.

2. breaker spring operator according to claim 1, is characterized in that,

The axis of rotation position of the position of centre of gravity of described mobile jib and this mobile jib is roughly consistent.

3. breaker spring operator according to claim 1 and 2, is characterized in that,

The buffer unit of when the release of disposing on the action axis of described blocking spring in blocking, connection, movable member being braked.

4. breaker spring operator according to claim 1 and 2, is characterized in that,

The mid portion of described main shaft is supported as rotating by framework, and an end of described main shaft and the link of described mobile jib,

Make the axle head of the end opposition side that links the described main shaft that described mobile jib is arranged outstanding from described framework, make manual-operating mechanism and should outstanding protuberance link and carry out blocking, the ON Action of described contact when the non-electric command operating of breaker.

5. breaker spring operator according to claim 1 and 2, is characterized in that,

Be formed with square hole or spline slotted eye on described mobile jib, and, being formed with square shaft or splined shaft on described main shaft, described mobile jib constitutes with respect to described main shaft dismounting freely.

6. breaker spring operator according to claim 4, is characterized in that,

Described manual-operating mechanism possesses: be fixed on the hydraulic cylinder that connecting rod, an end on the end of described main shaft rotates the connecting rod that is connected with this connecting rod freely, the hydraulic piston that is connected with the other end of this connecting rod, this hydraulic piston can be taken in movably,

Hydraulic oil by self-hydraulic in future source imports to described hydraulic cylinder described hydraulic piston is moved, and follows this to move, and described connecting rod moves and makes described connecting rod and main shaft rotation, thereby carries out blocking, the ON Action of described contact.

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