JP2008204864A - Switch - Google Patents

Abstract

An object of the present invention is to reduce the space of an operation mechanism using an open spring for an electromagnetic actuator.
A vacuum valve (5) having a pair of electrodes (3, 4) that can be contacted and separated, a wipe spring (14) that applies a contact load at the time of contact, insulating tubes (30, 36) housing the vacuum valve (5) and the wipe spring (14), and an insulating tube (30). 36, and an operation mechanism 1c that opens and closes the vacuum valve 5. The operation mechanism 1c is housed in a first yoke 39 that faces the insulating cylinder 36, and the electrodes 3 and 4 are connected to each other. An open circuit spring 38 biased in the separating direction, and an electromagnetic actuator having a permanent magnet 20, an armature 19, and solenoid coils 21 and 22 in a second yoke 41 connected to the first yoke 39. It is characterized by that.
[Selection] Figure 1

Description

  The present invention relates to a switch using an electromagnetic actuator capable of obtaining an operation force necessary for an opening / closing operation.

  Conventionally, a switch using an electromagnetic actuator performs an opening operation and a closing operation by exciting a solenoid coil, and when the closing is completed, the solenoid coil is de-energized so that the closed state is maintained by the holding force of the permanent magnet. It has become. Further, even when the opening is completed, the solenoid coil is de-excited, and the opening state is maintained by the spring force of the opening spring (see, for example, Patent Document 1).

  As shown in FIG. 3, this type of switch is composed of a blocking portion 1a that cuts off current, a wipe spring portion 1b that applies a contact load when the blocking portion 1a is closed, and an operation mechanism portion 1c that opens and closes the blocking portion 1a. ing. In FIG. 3, the closed state is shown on the right side of the figure, and the open state is shown on the left side of the figure.

  The blocking part 1a is provided with a vacuum valve 5 having a pair of electrodes 3 and 4 that can be contacted and separated within the vacuum insulating container 2. On the fixed side outside the vacuum insulating container 2, an upper conductor 6 serving as one electric circuit is fixed to an upper fixing member 7. Further, on the movable side, a movable-side energizing shaft 8 that is movable in the axial direction is provided, and is in sliding contact with the lower conductor 9 serving as the other electric path. One end of the insulating operation rod 10 is connected in the axial direction of the movable side energizing shaft 8.

  The wipe spring portion 1b has a wipe for connecting the first movable shaft 11 connected to the other end of the insulating operation rod 10 and the second movable shaft 12 arranged in the axial direction of the first movable shaft 11. A spring folder 13 is provided. In the wipe spring folder 13, a wipe spring 14 for applying a contact load between the pair of electrodes 3 and 4 and a buffer member 15 for absorbing an impact force at the time of opening and closing are provided.

  The operation mechanism unit 1c is provided with a rigid connecting beam 16 that connects the second movable shafts 12 for three phases, and an electromagnetic actuator 17. The electromagnetic actuator 17 includes a yoke 18 for forming a magnetic path, a magnetic armature 19 provided to move in the yoke 18, a permanent magnet 20 for moving or holding the armature 19 closed, and a magnetic flux in the yoke 18. It comprises a non-magnetic operating rod 23 that is connected to the connecting beam 16 through the yoke 18 with the closing coil 21, the opening coil 22, and the armature 19 to be increased or decreased.

In addition, on both sides of the electromagnetic actuator 17, an open spring 24 of an elastic member that is always urged in a direction to separate the armature 19 from the permanent magnet 20 is provided between the connecting beam 16 and the lower fixing member 25.
Japanese Patent Laying-Open No. 2005-79209 (Pages 2 and 3, FIG. 3)

The above conventional switch has the following problems.
Since the open spring 24 is disposed on both sides of the electromagnetic actuator 17, a large space is required in the operation mechanism portion 1c. Since the open spring 24 obtains a large operating force necessary for the open operation by the spring force, not only a space for installing the open spring 24 but also a large space in consideration of scattering of parts such as damage. Was necessary. Although it is conceivable to provide a protective wall to prevent scattering and to block operation sounds during opening and closing operations, the number of parts increases.

  Therefore, there has been a demand for an operation mechanism unit that can reduce the space for providing the open spring 24, prevent scattering of parts and the like in the event of damage, and that can block operation sound associated with opening and closing.

  The present invention has been made to solve the above problem, and an object of the present invention is to provide a switch that can reduce the space of an operation mechanism section using an open spring.

  In order to achieve the above object, a switch according to the present invention includes a vacuum valve having a pair of electrodes that can be contacted and separated, a wipe spring that applies a contact load when the electrodes are in contact, and an insulation that houses the vacuum valve and the wipe spring. A cylinder and an operation mechanism for fixing the insulating cylinder and opening and closing the vacuum valve. The operation mechanism is accommodated in a first yoke facing the insulation cylinder, and the electrode is The open-circuit spring is biased in the separating direction, and the second yoke connected to the first yoke includes a permanent magnet, an armature, and an electromagnetic actuator having a solenoid coil.

  According to the present invention, since the open spring for performing the open circuit operation is housed in the cylindrical first yoke connected to the second yoke of the electromagnetic actuator section, the space for providing the open spring is reduced. In the unlikely event of damage, it is possible to prevent scattering of parts and the like, and further, it is possible to block the operation sound associated with opening and closing.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a switch according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view illustrating a configuration of a switch according to Embodiment 1 of the present invention. In FIG. 1, the same components as those in the prior art are denoted by the same reference numerals. Further, in FIG. 1, a closed state is shown on the right side of the figure, and an open state is shown on the left side of the figure.

  As shown in FIG. 1, the switch includes a blocking portion 1a that cuts off the upper current in the drawing, a wipe spring portion 1b that applies a contact load when the blocking portion 1a is closed, and an operation mechanism portion 1c that opens and closes the lower cutting portion 1a in the drawing. It is composed of These are independent in each phase and are arranged in a horizontal row.

  In the blocking part 1a, a vacuum valve 5 having a pair of electrodes 3 and 4 that can be contacted and separated in the vacuum insulating container 2 is formed in a cylindrical first insulating cylinder 30 molded with an insulating material such as epoxy resin. Is provided. An upper conductor 31 serving as one electric circuit is provided on the fixed side outside the vacuum insulating container 2, and is led out from the end of the first insulating cylinder 30. Further, on the movable side, a movable-side energizing shaft 8 that is movable in the axial direction is provided, and is in sliding contact with the lower conductor 9 serving as the other electric path. One end of the insulating operation rod 10 is connected in the axial direction of the movable side energizing shaft 8. The vacuum valve 5 may be molded integrally with the first insulating cylinder 30, or after the vacuum valve 5 is mounted in the first insulating cylinder 30 manufactured in advance, the valve fixing member 32 is attached. You may fix by adhesion etc.

  The wipe spring portion 1b has a wipe for connecting the first movable shaft 11 connected to the other end of the insulating operation rod 10 and the second movable shaft 12 arranged in the axial direction of the first movable shaft 11. A spring folder 13 is provided. In the wipe spring folder 13, there are provided a wipe spring 14 for applying a contact load when the pair of electrodes 3 and 4 are in contact, and a buffer member 15 for absorbing an impact force at the time of opening and closing. A third movable shaft 34 arranged in the axial direction is connected to the second movable shaft 12 via a connecting member 33, and the third movable shaft 34 is an opening of a flange 35 made of a plate-like nonmagnetic material. It penetrates the part movably.

  The wipe spring folder 13, the connecting member 33 and the like are housed in a cylindrical second insulating cylinder 36 connected to the first insulating cylinder 30. The opening surface of the end portion of the second insulating cylinder 36 is a convex portion 36 a spreading in the radial direction, and is fixed to the flange 35 by a bolt 37. That is, the above-described vacuum valve 5, wipe spring folder 13, and the like are housed in an insulating cylinder composed of the first insulating cylinder 30 and the second insulating cylinder 36 and are fixed to the flange 35.

  The operation mechanism part 1c is comprised from the open circuit spring part 1ca and the electromagnetic actuator part 1cb.

  The open spring portion 1ca is provided with an open spring 38 of an elastic member that is constantly urged in the direction of separating the electrodes 3 and 4 from the outer periphery of the third movable shaft 34 extending from the wipe spring portion 1b. The open spring 38 is provided between the flange 35 and the electromagnetic actuator portion 1 cb so as to face the second insulating cylinder 36 and is accommodated in a cylindrical first yoke 39. The opening surface of the end portion of the first yoke 39 is a convex portion 39 a spreading in the radial direction, and is fixed to the flange 35 by a bolt 40. The bolt 40 is fixed at a position different from the bolt 37 on the wipe spring portion 1b side.

  The electromagnetic actuator portion 1 cb is provided with a movable non-magnetic operating rod 23 arranged in the axial direction of the third movable shaft 34. An armature 19 is fixed to the operation rod 23. On the outer periphery of the armature 19, there are provided a permanent magnet 20 that moves or keeps the armature 19 closed, and a closing coil 21 and an opening coil 22 that are solenoid coils that increase or decrease the magnetic flux. The armature 19 and the permanent magnet 20 are surrounded by a second yoke 41 for forming a magnetic path connected to the first yoke 39. The second yoke 41 is fixed to the lower fixing member 25.

  That is, the electromagnetic actuator portion 1 cb that generates a necessary operating force and the open circuit spring portion 1 ca that houses the open circuit spring 38 are fixed between the flange 35 and the lower fixing member 25. Here, the first yoke 39 and the second yoke 41 are connected and integrated. However, since the first yoke 39 is in contact with the non-magnetic flange 35, magnetic flux is generated in the open spring portion 1ca. It becomes difficult to form. A predetermined magnetic flux is formed in the second yoke 41.

  When the closed circuit is to be operated, a control circuit (not shown) is operated to excite the closed coil 21 in which the magnetic flux in the same direction as the magnetic flux of the permanent magnet 20 is excited to attract the armature 19 in the direction of the permanent magnet 20. . This suction force becomes an operation force at the time of closing, and the operating rod 23 is moved together with the armature 19 in the closing direction in the upper part of the figure to bring the electrodes 3 and 4 into contact. After the closing, the closing coil 21 is de-energized and the armature 19 is always attracted by the attraction force of the permanent magnet 20.

  On the other hand, when the open circuit state is set, a control circuit (not shown) is operated to excite the open circuit coil 22 that generates a magnetic flux in a direction opposite to the magnetic flux of the permanent magnet 20, and the attractive force between the armature 19 and the permanent magnet 20 is increased. Decrease. Accordingly, in the suction state, the operating force of the open spring 38 is moved together with the armature 19 to move the operating rod 23 in the open direction in the lower part of the figure. Furthermore, the open coil 22 is de-energized, and the open spring 38 is used to move and hold the electrodes 3 and 4 to the final position.

  According to the switch of the first embodiment, the opening spring that performs the opening operation is provided in the cylindrical first yoke 39 connected to the second yoke 41 of the electromagnetic actuator portion 1cb having the armature 19 and the permanent magnet 20. 38 is provided, the space for providing the open spring 38 can be reduced, parts can be prevented from being scattered even in the event of damage, and operation sound associated with opening and closing can be blocked. .

  In the first embodiment, each phase has been described as being arranged in a horizontal row, but may be arranged in a triangle. Moreover, since each phase is independent, it can also be used for a single-phase circuit.

  Next, a switch according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view illustrating a configuration of a switch according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment in that a connecting beam for collectively operating the vacuum valves for three phases is provided. In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, the open spring portion 1 ca is provided with a rigid connecting beam 42 that connects the third movable shafts 34 for three phases. The connecting beam 42 is stored in a non-magnetic storage container 43 and is fixed to the flange 35 with a bolt 44. A third movable shaft 34 that movably passes through the opening of the storage container 43 is connected to the intermediate portion of the connecting beam 42, and an open spring 38 is provided on the outer periphery thereof. The open spring 38 is housed in the first yoke 39, and the convex portion 39 a is fixed to the housing container 43 with a bolt 45. A second yoke 41 is connected to the first yoke 39, and an electromagnetic actuator portion 1cb is configured as in the first embodiment. The open spring 38 and the electromagnetic actuator unit 1cb have a predetermined operating force for operating three phases.

  In the second embodiment, in addition to the same effects as in the first embodiment, the three-phase vacuum valves 5 can be opened and closed by one open spring 38 and the electromagnetic actuator portion 1cb.

Sectional drawing which shows the structure of the switch concerning Example 1 of this invention. Sectional drawing which shows the structure of the switch concerning Example 2 of this invention. Sectional drawing which shows the structure of the conventional switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Blocking part 1b Wipe spring part 1c Operation mechanism part 1ca Opening spring part 1cb Electromagnetic actuator part 2 Vacuum insulation container 3, 4 Electrode 5 Vacuum valve 6, 31 Upper conductor 7 Upper fixing member 8 Movable side energizing shaft 9 Lower conductor 10 Insulating operation rod DESCRIPTION OF SYMBOLS 11 1st movable axis | shaft 12 2nd movable axis | shaft 13 Wipe spring folder 14 Wipe spring 15 Buffer member 16, 42 Connecting beam 17 Electromagnetic actuator 18 Yoke 19 Armature 20 Permanent magnet 21 Close coil 22 Open coil 23 Operation rod 24, 38 Open spring 25 Lower fixing member 30 First insulating cylinder 32 Valve fixing member 33 Connecting member 34 Third movable shaft 35 Flange 36 Second insulating cylinders 36a, 39a Projections 37, 40, 44, 45 Bolt 39 First yoke 41 Second yoke 43 storage container

Claims (5)

A vacuum valve having a pair of electrodes that can be contacted and separated;
A wipe spring that applies a contact load when the electrode contacts,
An insulating cylinder containing the vacuum valve and the wipe spring;
An operation mechanism for fixing the insulating cylinder and opening and closing the vacuum valve;
The operating mechanism portion is housed in a first yoke that faces the insulating cylinder, and an open spring that is biased in a direction to separate the electrodes;
A switch comprising: a second yoke connected to the first yoke; and a permanent magnet, an armature, and an electromagnetic actuator having a solenoid coil.   2. The switch according to claim 1, wherein non-magnetic flanges are provided between the insulating cylinder and the first yoke, and each of the flanges is fixed to the flange.   The switch according to claim 1 or 2, wherein the vacuum valve, the wipe spring, and the operation mechanism unit are independent of each other and are used in a three-phase circuit.   The switch according to claim 1 or 2, wherein the vacuum valve, the wipe spring, and the operation mechanism section are independent of each other and are used in a single-phase circuit. A vacuum valve having a pair of electrodes that can be contacted and separated;
A wipe spring that applies a contact load when the electrode contacts,
An insulating cylinder containing the vacuum valve and the wipe spring;
An operation mechanism for fixing the insulating cylinder and opening and closing the vacuum valve;
The operation mechanism section includes a connecting beam to which the wipe springs for three phases are connected,
An open spring coupled to the connecting beam, housed in a first yoke, and biased in a direction to release the electrode;
A switch comprising: a second yoke connected to the first yoke; and a permanent magnet, an armature, and an electromagnetic actuator having a solenoid coil.

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