JP2012252968A - Switch and switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch and the like that guide an operation rod for a long distance and allow inclination during resting.SOLUTION: To solve the above-mentioned problem, a switch according to the present invention comprises a stationary electrode 4, a movable electrode 3 opposed to and approaching to and separated from the stationary electrode 4, an operation unit 14 generating an operation force for operating the movable electrode 3, an operation rod 5 transmitting the operation force from the operation unit 14 to the movable electrode 3, and a guide 6e contacting the operation rod 5 and guiding the operation rod 5 so that a driving action of the operation rod 5 follows a driving shaft direction. The guide 6e simultaneously guides the operation rod 5 for a distance longer than an axial length of the guide 6e contacting the operation rod 5.

Description

  The present invention relates to a switch and a switch gear, and more particularly to a guide mechanism.

  A switch having a fixed electrode and a movable electrode is provided with a guide for guiding the driving direction so that the movable electrode can properly contact the fixed electrode.

  In a switch that repeatedly turns on and off at least one point in vacuum or in the air, including a circuit breaker, a convexity remains on the electrode surface due to local welding at the part of the electrode at the time of the circuit break, which may result in a non-horizontal state after the circuit break. There is sex. Therefore, at the time of the next injection after the shut-off, in order to ensure a current-carrying area (contact area) even if the projection remains on the electrode surface, the movable electrode connected to the operation rod is aligned with the projection on the electrode surface. A guide needs to be formed to tilt.

  In addition, the operating rod is suspended from the operating device at a blocking position or the like that is away from the fixed contact. At this time, there is no problem as long as the force applied to the operating rod is only in the driving direction, but in reality, a force other than the driving direction due to the positional deviation or dimensional error of the operating device link mechanism is applied to the operating rod. Is held tilted. In this case, since the guide is directed in the driving direction, the operating rod is caught by the inner peripheral end portion of the guide, and stress is concentrated at the hooked portion. In order to prevent stress concentration on the guide due to this catch, it is necessary for the guide to allow the tilt of the operating rod and absorb these forces.

  Therefore, it is desirable that the guide allows the tilt of the operation rod when the movable electrode is stationary.

  On the other hand, if the operation such as closing and closing is performed with the operation rod tilted, a local contact pressure with the operation rod is applied to the inner peripheral end of the guide, and the guide may be damaged. In addition, a large operating force is required to overcome the local contact pressure as the operating force to the operating rod, leading to an increase in the size of the operating device.

  Therefore, it is desired that the guide guides the operating rod straight in the driving direction when the movable electrode is operated.

  Here, as a conventional guide mechanism, there is one described in Patent Document 1, for example. In Patent Document 1, means for allowing misalignment is provided between the guide portion and the operation rod. According to Patent Document 1, it is possible to generate an equal contact force with respect to the two contact points constituting the two-point cut by allowing the operation rod to be misaligned.

JP 2009-32611 A

  According to the contents described in Patent Document 1 described above, the tilt of the operating rod is allowed, but the distance for guiding the operating rod is short. Therefore, when the stroke length for moving the movable electrode becomes longer, it is necessary to lengthen the guide in the axial direction in order to increase the distance for guiding the operation rod. On the other hand, if the guide is lengthened in the axial direction, an angle for tilting the operation rod cannot be obtained, and it is difficult to tilt this time.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a switch or the like that guides an operating rod over a long distance and permits tilting at rest.

  In order to solve the above problems, a switch according to the present invention includes a fixed electrode, a movable electrode facing and separating from the fixed electrode, an operating device for generating an operating force for operating the movable electrode, An operating rod that transmits the operating force from the operating device to the movable electrode, and a guide that contacts the operating rod and guides the operating rod so that the driving operation of the operating rod is along the drive axis direction. A switch, characterized in that the guide guides the operating rod over a distance longer than the axial length of the guide itself simultaneously contacting the operating rod.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the switch etc. which guide an operation rod over a long distance and accept | permit the inclination at the time of a rest.

It is a side view of the switch in Example 1. It is a figure explaining the guide mechanism in Example 1, and shows an injection state. The side view and side sectional view of a fixed guide in Example 1 are shown. The side view and sectional side view of the movable guide 6e in Example 1 are shown. It is a figure which shows the movable conductor 5 which attached the stopper in Example 1. FIG. It is the figure which looked at the movable conductor 5 in Example 1 from the axial direction. It is a figure explaining the procedure which assembles the guide mechanism in Example 1. FIG. It is a figure which shows the transient state at the time of the drive of the movable conductor 5 in Example 1. FIG. It is a figure explaining the guide mechanism in Example 1, and shows the interruption | blocking state. It is a figure explaining the inclination at the time of injection in Example 1. FIG. It is a figure explaining the inclination at the time of interruption | blocking in Example 1. FIG. It is a figure explaining the guide mechanism in Example 2. FIG. It is a side view of the switchgear in Example 3.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. The following are examples, and are not intended to limit the content of the present invention to the following embodiments. The present invention is defined by the description of the scope of claims, and can be modified into various modes in order to satisfy such contents.

  A first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the switch according to the present embodiment is generally configured by a vacuum vessel 1, an operation mechanism 14, and a link mechanism 16 that couples both.

  The vacuum vessel 1 is composed of an insulating cylinder 2 and an end plate 17, and a guide pressing portion 6 d is fixed to an opening at the top of the end plate 17 via a fixing bracket 7. Inside the vacuum vessel 1, a fixed electrode 4 and a movable electrode 3 facing the fixed electrode 4 are arranged, and the movable electrode 3 is a movable conductor (also operating rod) 5 reinforced with a metal that is not annealed at a high temperature such as stainless steel. The fixed electrode 4 is fixed to the tip of the fixed conductor 18, respectively. The movable conductor 5 is led out of the vacuum vessel 1 and is connected to the link mechanism 16 by the operation pin 8. The switch described in the present embodiment is a two-position type switch for closing and closing (or disconnection, grounding, etc.), and switches each position by driving a movable electrode.

  The link mechanism 16 includes a connection portion 19 connected to the movable conductor 5 by an operation pin 8 and an insulating operation rod that is connected to the connection portion 19 and insulates the high voltage on the main circuit side from being applied to the operation device side. 9, a connecting portion 10 and a connecting portion 20 that connect the insulating operating rod 9 and the operating lever 11, a shaft 12 that is disposed in the middle of the operating lever 11 and serves as a rotation axis of the operating lever 11, The connecting rod 13 is connected to the other end of the connecting portion 10, and the connecting portion 21 connects the connecting rod 13 and the operation mechanism 14.

  The operation mechanism 14 generates an operation force for driving the movable electrode 3 using an electromagnet or the like.

  The movable electrode 3 is stopped at a closing (closed) position for energization by the clockwise or counterclockwise rotation of the operating lever 11 by the operating mechanism 14, and the current is cut off at a position closer to the operating device than the closed position. Stopped at the disconnection (open) position for stopping or at the position closer to the controller side than this open position, and stopped at the disconnection position or grounding position to ensure the safety of the inspection operator against surge voltage such as lightning Is done.

  The structure of the guide portion will be described with reference to FIGS. As shown in FIG. 2, the guide portion includes the guide pressing portion 6d, which is the above-described fixing member, the movable guide 6e, and stoppers 5a and 5b that are fixed to the movable conductor 5 at both ends in the axial direction of the movable guide 6e. It consists of. The movable conductor 5 is guided by the movable guide 6e when the movable contact is moved, and the outer peripheral length 5-wi of the movable conductor 5 is substantially the same as the minimum inner peripheral length 6-wi of the movable guide 6e, and It is provided to be slightly smaller. The movable guide 6e is in sliding contact with the inner diameter side of the guide pressing portion 6d when passing through the inside of the guide pressing portion 6d. In order to realize such a mechanism, the inner diameter of the guide pressing portion 6d is formed to be smaller than the maximum value of the outer diameter of the movable guide 6e and larger than the minimum value.

  FIG. 3 shows the guide pressing portion 6d. The inner diameter of the guide pressing portion 6d is a uniform length in the axial direction, and a wide portion 6f having a wide outer diameter is formed so that the fixing bracket 7 is not removed. The fixing bracket 7 is disposed between the wide portion 6 f and the end plate 17, and fixes the guide pressing portion 6 d to the vacuum vessel 1.

  FIG. 4 shows the movable guide 6e. The movable guide 6e is provided with a plurality of cuts equally in the circumferential direction from the both axial end portions of the movable guide 6e toward the center in the axial direction, and the end portions are each opened with a divided piece (like a petal). It has become. Here, if there is only one notch, a plurality of notches are provided when the 180 ° back side on the side where the notch is provided cannot be properly opened and is not pressed by the guide pressing portion 6d. This is because a space for allowing inclination cannot be provided. Evenly, when the notch is evenly provided, the force is applied from any direction (that is, tilted in any direction). This is because it can be inserted and removed.

  The notch is not provided in the central portion in the axial direction, and the movable guide 6e is composed of one member without being completely separated. Hereinafter, the portion having the cut on the axial end side is referred to as the movable guide first regions 6a and 6b, and the portion having no cut in the central portion in the axial direction is referred to as the second region 6c. The movable guide 6e is composed of an elastic member, and is open in a natural state where no force is applied. That is, the outer peripheral lengths of the movable guide first regions 6a and 6b are formed so as to change to different peripheral lengths depending on whether or not they are in sliding contact with the guide pressing portion 6d.

  Then, as shown in FIG. 2, the inner peripheral lengths 6a-wo and 6b-wo are formed so as to gradually spread from the movable guide second region 6c to the movable guide both ends first regions 6a and 6b. When the guide is held inside the guide pressing portion 6d, the movable guide 6e is closed, and the inner peripheral side thereof is in contact with the movable conductor 5 to perform a guide function.

  The thickness of the movable guide 6e is not constant. As a result, the force pressed by the guide pressing portion 6d is weak (except for the portion where the thickness is maximum) (becomes supported at a point when viewed from the axial direction), and the movable guide 6e is positioned inside the guide pressing portion 6d. In this case, the inclination described later is easily made.

  Further, the thickness of the movable guide 6e is maximized from the axial center of the movable guide 6e in a state of being held by the guide holding portion 6d so that the guide holding portion 6d can slide (smoothly) without colliding with the movable guide 6e. The inclination up to the position becomes 0 ° or more and less than 90 ° in any part when the axis in the driving direction of the movable conductor 5 (the movable electrode 3 side at the time of closing and the actuator side at the time of interruption) is 0 °. It ’s like that.

  FIG. 5 shows the states of the stoppers 5a and 5b fixed to the movable conductor 5 at both ends of the movable guide 6e. Although the movable guide 6e is not fixed to the movable conductor 5 in this embodiment, one or more stoppers are provided, and the outer peripheral lengths 5b-wo (5a-wo) of the stoppers 5a and 5b at both ends as shown in FIG. Is larger than the maximum value of the outer peripheral length of both ends of the movable guide in the axial direction, the movable guide 6e is supported by being sandwiched between the stoppers 5a and 5b at both ends without falling off. Thereby, the movable guide 6e can be driven in the axial direction together with the movable conductor 5 while being sandwiched between the stoppers 5a and 5b in accordance with the drive of the movable conductor 5.

  FIG. 6 shows a state where the stoppers 5a and 5b are fixed and not inserted as viewed from both ends in the axial direction. As can be seen from the figure in the case where the stoppers 5a and 5b are not fixed, when located inside the guide pressing portion 6d, the plurality of cuts of the movable guide 6e are in a closed state and are not positioned inside the guide pressing portion 6d. In this case, the movable guide 6e is open from a plurality of cuts. Thereby, it turns out that it switches between the case where it does not fulfill | perform with the case where it does not fulfill with the case where it does not fulfill | perform with the case where it is located inside the guide holding | suppressing part 6d.

  FIG. 7 shows a procedure for assembling the guide portion. First, the movable guide 6e, which is composed of an elastic member or the like and is divided into a plurality of parts equally in the circumferential direction, is brought into sliding contact with the inner periphery of the guide pressing portion 6d. Thereafter, a guide pressing portion 6d in which the movable guide 6e is slidably contacted from the direction in which the stopper is not provided is inserted into the movable conductor 5 provided with the stopper 5a (or 5b) at one place on the outer periphery of the movable conductor 5. . Finally, a stopper 5b is provided on the outer periphery of the movable conductor 5 on the side where the guide pressing portion 6d is inserted, and the guide pressing portion 6d is fixed to the end plate 17 of the vacuum vessel 1 with a fixing bracket 7 such as a bolt.

  The switch configured as described above will be described with reference to FIGS. 2 and 8 to 11. First, a mechanism for guiding the movable conductor 5 during operation will be described.

  FIG. 2 shows the state of the movable conductor 5 and the guide portion when in the closing state. From this state, a transitional state is passed as shown in FIG. 8, and finally a transition is made to a cutoff state as shown in FIG. To do. In the present embodiment, the case of two positions of closing dredging interruption (or disconnection, grounding, etc.) has been described. The movable guide 6e may have the same length on the movable electrode 3 side and the operation mechanism 14 side, but the three-position type When applied to a switch, the movable guide is designed so that the guide distance on the movable electrode side is longer than the guide distance on the operating unit side, and the tilt can be allowed even when the actuator is stopped in a shut-off state. The movable electrode 3 side of 6e needs to be longer than the operation mechanism 14 side.

In the inserted state, only the portion on the operating unit side of the movable guide 6e is located in the guide pressing portion 6d. Therefore, movable guide 6e, the inner peripheral that is in contact with the movable conductor 5 (at the time of stop) at the same time, is only part of the operating-side and its length is l _1.

  From this state, a transitional state as shown in FIG. This transient state is described for the sake of explanation, and does not indicate that the vehicle actually stops. In this transient state, part of the operating device side and the movable electrode 3 side is also located in the guide pressing portion 6d. Therefore, in the movable guide 6e, the inner periphery of the movable guide 6e is in contact with the movable conductor 5 as well as the portion on the movable electrode 3 side in addition to the above-described portion on the operating device side. That is, at this time, it is necessary to accumulate the total axial length L of the movable guide 6e (more precisely, 1 / cos θ, etc.), but in this specification, the change in the length when opened and closed is complicated. In order to prevent this, the description is omitted.) Is in contact with the movable conductor 5.

The transition to the shut-off state is finally made via the transient state, and at this time, only the portion on the movable electrode 3 side of the movable guide 6e is located in the guide pressing portion 6d. It is. Therefore, movable guide 6e, the inner peripheral that is in contact with the movable conductor 5 (at the time of stop) at the same time, is only part of the movable electrode side and its length is l _2.

Of the movable guide 6e, the portion where the inner peripheral side is in contact with the movable conductor 5 serves as a guide function for guiding the driving direction of the movable conductor 5, so that the distance that the movable guide 6e can guide after all is the movable guide 6e. Thus, the inner circumference is not L ₁ or l ₂ which is in contact with the movable conductor 5 at the same time, but L of the entire length. As described above, the movable guide 6e is changed in the contact portion, so that the movable conductor 6e has a movable conductor 6e whose inner periphery is longer than l ₁ and l ₂ that are in contact with the movable conductor 5 at the same time. 5 can be guided.

  Next, it will be described with reference to FIGS. 10 and 11 that the movable guide 6e is allowed to tilt when it is stationary.

  FIG. 10 shows the inclination in the input state. In the throwing state, the movable guide 6e has its inner circumference simultaneously in contact with the movable conductor 5 only at the portion on the operating device side, and since the movable electrode 3 side is open, the movable conductor 5 is inclined. The angle can be secured, and therefore the convexity on the surface of the electrode due to local welding remains on a part of the electrode, so that even if it is no longer horizontal after shut-off, it can tilt, ensuring a contact area. To be able to.

  Further, in this embodiment, the movable guide 6e is formed of an elastic member, and the entire surface of the movable guide 6e that contacts the movable conductor 5 can be inclined, the catch itself can be prevented, and the stress concentration can be further reduced. Thereby, the gap between the movable conductor 5 on the operating device side and the guide pressing portion 6d can be minimized, and it is possible to suppress the generation of local contact pressure due to catching at the next disconnection.

  FIG. 11 shows the inclination in the blocking state. In the cut-off state, the movable guide 6e has its inner periphery simultaneously in contact with the movable conductor 5 only at the movable electrode 3 side, and since the operating device side is open, the movable conductor 5 is inclined. An angle can be secured. Therefore, the movable conductor 5 is suspended from the operating device, and the movable conductor 5 is allowed to be held in an inclined state by applying a force to the movable conductor 5 other than the driving direction due to the positional deviation or dimensional error of the link mechanism. Thus, stress concentration can be prevented.

  Further, in this embodiment, the movable guide 6e is formed of an elastic member, and the entire surface of the movable guide 6e that contacts the movable conductor 5 can be inclined, the catch itself can be prevented, and the stress concentration can be further reduced. As a result, the gap between the movable conductor 5 on the operating device side and the guide pressing portion 6d can be minimized, and it is possible to suppress the generation of local contact pressure due to catching at the next charging.

  In the present embodiment, the guide pressing portion 6d is fixed (with respect to the vacuum vessel 1), but is not necessarily fixed for achieving the effects of the invention. The movable guide 6e may be allowed to move relatively in the axial direction.

  A second embodiment will be described with reference to FIG. In addition, about the location which overlaps with Example 1, the description is abbreviate | omitted. In this embodiment, instead of using the stoppers 5 a and 5 b, the second region 26 c at the center of the movable guide 6 e is lengthened and the second region 26 c is fixed to the movable conductor 5.

  As long as the second region without a notch is fixed, there is no trouble in realizing the mechanism of the first embodiment, and the same effect can be obtained. Thereby, a mechanism for mounting the movable guide 6e on the movable conductor 5 itself to be guided is realized.

  In addition, according to this mechanism, there is no need for a stopper, and the number of parts can be reduced.

  In each of the above-described embodiments, the movable electrode 3 and the fixed electrode 4 are disposed in the vacuum vessel 1 having a vacuum inside, and the switch is a vacuum-insulated switch. It is not limited and it is possible to use any insulated switch. In particular, when an air-insulated switch is used, the stroke distance becomes longer and the guiding distance becomes longer, so it is beneficial to use the above-described guide.

  A third embodiment will be described with reference to FIG. In the present embodiment, an example in which the switch described in the first embodiment is applied to a switch gear will be described.

  The fixed conductor 18 is connected to a cable 15 for supplying power to the load side, and the movable conductor 5 is provided with a flexible conductor 30 in the drawing depth direction, and the flexible conductor 30 is connected to the busbar side. These are housed in the housing 31.

  As described in this embodiment, it is possible to apply the above-described switch to a switch gear, and it is possible to apply to various switch gears without being limited to the switch gear described here. . In addition, although the present Example demonstrated using the switch demonstrated in Example 1 as an example, of course, applying the various switches which can implement | achieve this invention including the switch demonstrated in Example 2 is applied. Is possible.

DESCRIPTION OF SYMBOLS 1 Vacuum container 2 Insulating cylinder 3 Movable electrode 4 Fixed electrode 5 Movable conductor (control rod)
6a, 6b 1st area | region 6c, 26c 2nd area | region 6d Guide holding | maintenance part 6e Movable guide 6f Wide part 7 Fixing metal fitting 8 Operation pin 9 Insulation operation rod 10 Lever connection part 11 Operation lever 12 Shaft 13 Connection rod 14 Operation mechanism 15 Cable 16 Link mechanism 17 End plate 18 Fixed conductors 19, 20, and 21 Connection portion 30 Flexible conductor 31 Housing

Claims (14)

A fixed electrode;
A movable electrode facing and separating from the fixed electrode;
An operating device for generating an operating force for operating the movable electrode;
An operating rod for transmitting the operating force from the operating device to the movable electrode;
A switch that includes a guide that contacts the operation rod and guides the operation rod so that a drive operation of the operation rod is along a drive axis direction;
A switch that guides the operating rod over a longer distance than an axial length of the guide itself that contacts the operating rod at the same time. The switch according to claim 1,
The guide is a guide in which a contact portion with respect to the operation rod changes,
The switch is configured to guide the operating rod over a distance longer than an axial length of the guide itself, which is in contact with the operating rod at the same time, by changing a contact portion with the operating rod. . The switch according to claim 1 or 2,
The guide has a guide distance on the movable electrode side that is longer than a guide distance on the operating device side,
The switch is characterized in that the movable electrode moves to three positions with respect to the fixed electrode. The switch according to claim 1, wherein
Furthermore, the guide passes through the inside, and when the guide passes through the inside, a guide pressing member that comes into sliding contact with the guide is provided.
The inner diameter of the guide pressing member is formed smaller than the maximum value of the outer diameter of the guide and larger than the minimum value,
The switch, wherein the guide moves relative to the guide pressing member in the axial direction. The switch according to claim 4,
A switch according to claim 1, wherein the thickness of the guide is not constant. The switch according to claim 5,
When the guide pressing member and the guide are in sliding contact,
The inclination of the outer diameter of the guide from the axial center of the guide to the position inside the guide pressing member where the outer diameter of the guide is the maximum,
In any part, the switch is characterized in that the angle in the driving direction of the operating rod is 0 ° or more and less than 90 °. The switch according to any one of claims 1 to 6,
The switch is characterized in that the guide is made of an elastic member. The switch according to any one of claims 1 to 7,
The switch is characterized in that the guide has a plurality of cuts from the axial end toward the axial center. The switch according to claim 8, wherein the plurality of cuts are evenly arranged in a circumferential direction of the guide. The switch according to any one of claims 1 to 9,
A switch that is provided with stoppers that prevent the guide from coming off the operating rod at both ends in the axial direction of the guide in the operating rod. The switch according to any one of claims 1 to 9,
The switch according to claim 1, wherein an axially central portion of the guide is fixed to the operation rod. The switch according to any one of claims 1 to 11,
The switch is an air insulated switch. The switch according to any one of claims 1 to 11,
The fixed electrode and the movable electrode are arranged in a vacuum container having a vacuum inside,
The switch is a vacuum insulated switch. The switch according to claim 12 or 13, and a solid insulator disposed around the fixed electrode and the movable electrode and having a surface at a ground potential,
A busbar connected to the system side for supplying power to the switch, a cable for supplying power from the switch in the switch unit to the load side, and a housing for housing them integrally. Switch gear characterized by

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