JP6282522B2 - Electromagnetic operating switchgear and wipe amount adjustment method thereof - Google Patents

Description

The present invention relates to wipe amount adjustment method for an electromagnetic-operated switchgear and its, in particular, suitable electromagnetic-operated opening and closing device operates to open or close the switch, such as a vacuum circuit breaker utilizing the electromagnetic force of the electromagnetic operating device and to wipe amount adjustment method for it.

  As an electromagnetically operated switchgear in this technical field, there is one described in Patent Document 1. This Patent Document 1 aims to provide a vacuum circuit breaker that can further reduce the depth dimension of a power receiving / distributing switch gear having a vacuum circuit breaker as a component, and a carriage on which an operation unit and a circuit breaker are mounted, A vacuum circuit breaker comprising a control plug in which a connector of a control cable connected to the switchgear can be inserted and removed, and the control plug has a case housing the operation unit so that the connection port portion faces vertically upward. It is described that the connector of the control cable provided on the ceiling board can be inserted into and removed from the connection port of the control plug in a vertical direction.

  Another example of the electromagnetically operated switchgear is described in Patent Document 2. This Patent Document 2 aims to reduce the number of parts such as reinforcing members and connecting links by dispersing the mechanical strength of the operation mechanism unit, and a vacuum valve having a pair of contacts for opening and closing a main circuit; Insulating operating rod connected in the axial direction of the movable shaft of the vacuum valve, a wipe spring connected in the axial direction of the insulating operating rod and applying a contact load between the contacts, and a pivotable one end connected to the wipe spring There is described a vacuum circuit breaker provided with an operation lever and an operation mechanism connected to the other end of the operation lever.

JP 2010-27486 A JP 2012-221650 A

  In Patent Documents 1 and 2 described above, the wipe amount is adjusted by configuring a mechanism for adjusting the wipe amount before and after the wipe spring.

  However, in recent years, due to the downsizing of devices, there is a tendency to reduce the space for arranging the mechanism for adjusting the wipe amount, while the wipe amount is small because of an important adjustment value directly connected to the main circuit. Although a highly adjustable wipe adjusting mechanism that can be arranged in a space is required, Patent Documents 1 and 2 are not necessarily configured to correspond to the above.

The present invention has been made in view of the above, it is an object of equipment even made compact, electromagnetic-operated switchgear and its wipe amount adjustment of the can be improved workability with less space It is to provide a method.

In order to achieve the above object, an electromagnetically operated switchgear according to the present invention is an electromagnetic coil that separates or contacts the movable iron core and the stationary iron core according to the movable iron core and the stationary iron core that are arranged opposite to each other and electromagnetic force. An electromagnetic operating device comprising an electromagnet disposed in the center of the case and a driving force associated with the electromagnetic force generated by the electromagnet of the electromagnetic operating device. Is transmitted through the main circuit side lever and the insulating rod by the rotation of the main shaft of the shaft connected through the operation plate, and the movable electrode and the fixed electrode arranged opposite to each other are separated or contacted, and the insulator And a vacuum circuit breaker having an insulator casting interrupting portion integrally cast with the pin on which the through hole is formed on the main circuit side lever is attached in a direction perpendicular to the penetrating direction of the through hole, In addition, a female screw portion is formed at the lower portion of the insulating rod, and a bolt is inserted into the female screw portion of the insulating rod through the through hole of the pin, and a nut passed through the bolt is tightened. In order to adjust the insertion dimension of the bolt into the female thread portion in the case where the main circuit side lever and the insulating rod are connected and the connecting portion of the main circuit side lever and the insulating rod is covered. A hole for inserting a tool for turning the nut is provided, and the hole is provided in the lower part of the bolt and the case on the extension line of the main circuit side lever, respectively .

In order to achieve the above object, the wipe amount adjustment method for an electromagnetically operated switchgear according to the present invention includes a movable iron core and a stationary iron core that are arranged opposite to each other, and the movable iron core and the stationary iron core according to electromagnetic force. And an electromagnetic operation device comprising an electromagnet disposed at the center of the case and driven by electromagnetic force generated by the electromagnet of the electromagnetic operation device The force is transmitted through the main circuit side lever and the insulating rod by the rotation of the main shaft of the shaft connected to the electromagnetic operating device via the operation plate, and the movable electrode and the fixed electrode arranged opposite to each other are transmitted. A vacuum circuit breaker having an insulator casting interrupting portion that is separated or contacted and is integrally cast with an insulator, and the pin on which the through hole is formed in the main circuit side lever has a through direction of the through hole. Orthogonal A female screw part is formed at the lower part of the insulating rod, and a bolt is inserted into the female screw part of the insulating rod through the through hole of the pin, and is passed through the bolt. When the wipe amount of the electromagnetically operated switchgear to which the main circuit side lever and the insulating rod are connected is adjusted by tightening the nut, the connection portion of the main circuit side lever and the insulating rod is covered. The case is provided with holes in the lower part of the bolt and on the extension line of the main circuit side lever, and a tool is inserted from the hole provided in the case on the extension line of the main circuit side lever to remove the nut. Loosen, by inserting a tool through a hole provided in the lower part of the bolt turning the bolt adjusts the wipe amount by changing the insertion length into the female screw portion of the bolt And wherein the door.

  According to the present invention, even if the device is made compact, an effect of improving workability in a small space can be obtained.

It is a front view which shows Example 1 of the electromagnetically operated switchgear of the present invention. It is a figure which partially shows the relationship between the interruption | blocking part and operation mechanism part in Example 1 of the electromagnetically operated switchgear of this invention. It is a figure which partially shows the relationship between the interruption | blocking part and auxiliary contact part in Example 1 of the electromagnetically operated switchgear of this invention. It is sectional drawing which shows the detail of the wipe structure in Example 1 of the electromagnetically operated switchgear of this invention.

Hereinafter, with reference to the embodiments shown, illustrating the wipe amount adjustment method the electromagnetic-operated switchgear and its of the present invention. In each figure, the same symbols are used for the same components.

  1 to 4 show a first embodiment of an electromagnetically operated switchgear according to the present invention.

  As shown in the figure, the electromagnetically operated switchgear according to this embodiment includes a movable iron core and a fixed iron core (not shown) arranged opposite to each other, and an electromagnetic coil 24 that separates or contacts the movable iron core and the fixed iron core according to electromagnetic force. The electromagnetic operating device 3 is made of an electromagnet disposed at the center of the case 49, and the driving force generated by the electromagnetic force generated by the electromagnet of the electromagnetic operating device 3 is It is transmitted through the main circuit side lever 15 and the insulating rod 18 by the rotation of the main shaft of the shaft 2 connected to the operation device 3 via the operation plate 29, and fixed to a movable electrode (not shown) arranged opposite to each other. A vacuum circuit breaker 60 having an insulator casting breaker 48 in which electrodes are separated or contacted and are integrally cast with an insulator.

  Further, the electromagnetically operated switchgear according to the present embodiment includes an electromagnetically operated device 3 that generates a driving force attached to the center of the case 49, a capacitor 4 for charging the current of the electromagnet coil 24, and an electromagnetically operated switchgear. An auxiliary contact 1 for converting the number of operations and the open / closed state into a digital signal, a control board 41 for controlling an open / close operation command from the control plug 42 or the on button 44, and the off button 45 and the operation of the electromagnetic operating device 3; A shaft 2 having an insulator casting cutoff portion 48 having a vacuum valve 50 for energizing or shutting off the main circuit, and a link mechanism for linking the driving force generated by the electromagnetic operating device 3 to the insulator casting cutoff portion 48. It has.

  Hereinafter, each configuration will be described in detail.

  First, the electromagnetic operating device 3 is fixed to the center of the case 49 by the mounting bolt 20 and the mounting plates 21 and 25, and the permanent magnet 22 and the electromagnetic coil 24 mounted between the upper and lower mounting plates 21 and 25 and the lower mounting. It is comprised by the interruption | blocking spring 27 of the plate 25 lower part, and the operation rod 26 which penetrates the center of the electromagnetic operating device 3. FIG. The permanent magnet 22 and the electromagnet coil 24 are housed in a ferromagnetic case in order to generate a strong magnetic flux. The electromagnetic operating device 3 applies a driving force in the vertical direction to the operating rod 26 using the attractive force generated by the magnetic flux of the permanent magnet 22, the electromagnetic force generated in the electromagnet coil 24, and the elastic force of the cutoff spring 27.

  On the other hand, the insulator casting blocking section 48 includes a vacuum valve 50 that opens and closes a main circuit by contacting or separating a movable electrode and a fixed electrode facing each other inside the vacuum vessel, and a main circuit conductor 52 connected to the lower conductor 46. And a wipe spring 53 that adjusts the contact pressure of the electrode in the vacuum valve 50 by a spring force, and an insulating rod 18 that electrically insulates the main circuit from other components, and these are cast with an insulating resin. This is the structure.

  The shaft 2 has a structure in which an auxiliary contact side lever 13, a main circuit side lever 15, and an electromagnetic actuator side lever 16 are connected around a shaft main shaft 14. The shaft 2 is connected to the electromagnetic operating device 3 via the operation plate 29, and the driving force generated by the electromagnetic operating device 3 is transmitted through the main circuit side lever 15 by the rotation of the shaft main shaft 14, and the insulator casting blocking portion. 48.

  Further, as shown in FIG. 3, the auxiliary contact portion 1 is connected to the operation rod 5 via the operation rod 5 that is movable up and down by the driving force transmitted from the auxiliary contact side lever 13 and the auxiliary contact lever 8, Connected to the operating rod 5 via the auxiliary contact 7 for converting the opening / closing state of the insulator casting blocking part 48 into a digital signal, the counter lever 10 and the counter operating spring 9, and the number of times of opening and closing the insulator casting blocking part 48 And a counter 6 for displaying.

  Further, the auxiliary contact portion 1 operates in conjunction with the electromagnetic operating device 3 via the shaft 2, and opens and closes the insulator casting blocking portion 48 to the control plug 42 connected to the control board 41 or an external control device. Send status.

  In this embodiment, the pin 34 having a through hole 34A formed in the vertical direction is attached to the main circuit side lever 15 in a direction perpendicular to the through direction of the through hole 34A (perpendicular to the paper surface), and A female screw portion 40 is formed in the lower portion of the insulating rod 18, and a bolt 33 is inserted into the female screw portion 40 of the insulating rod 18 through the through hole 34 </ b> A of the pin 34, and a nut 35 passed through the bolt 33. The main circuit side lever 15 and the insulating rod 18 are connected by tightening.

  In this embodiment, as will be described in detail later, a nut 49 is attached to the case 49 covering the connecting portion between the main circuit side lever 15 and the insulating rod 18 in order to adjust the insertion dimension of the bolt 33 into the female screw portion 40. Holes 54 and 55 for inserting a tool (for example, a wrench) for turning 35 and 36 are provided. The holes 54 and 55 are provided in the lower part of the bolt 33 and the case 49 on the extension line of the main circuit side lever 15, respectively.

  In the present embodiment, an example in which two nuts 35 and 36 (double nuts) are used has been described, but one nut (single nut) can also be used.

  Next, the operation of the electromagnetically operated switchgear according to this embodiment will be described.

  Normally, when the electromagnetically operated switchgear is operated, the fixed electrode and the movable electrode in the vacuum valve 50 are in contact with each other, and the current flows from the upper conductor 47 through the vacuum valve 50, the movable conductor 51 and the main circuit conductor 52 to the lower conductor. 46 is energized. In the event of a failure or inspection in the system to which the electromagnetically operated switchgear is connected, the fixed electrode and the movable electrode inside the vacuum valve 50 are separated, and the energization of the main circuit is cut off. Hereinafter, the operation will be described.

  That is, the operation command output from the control plug 42 or the off button 45 is transmitted to the control board 41. The control board 41 energizes the electromagnet coil 24 with the electric charge charged in the capacitor 4 in response to the operation command. The operating rod 26 is released from the attractive force of the permanent magnet 22 and moves upward by the electromagnetic force of the electromagnet coil 24 and the elastic force of the cutoff spring 27. The shaft main shaft 14 connected to the operation rod 26 via the electromagnetic actuator side lever 16 rotates in conjunction with the operation rod 26. Due to the rotational operation of the shaft main shaft 14, the short part of the main circuit side lever 15 operates in the vertical direction, the insulating rod 18, the wipe spring 53 and the movable conductor 51 operate downward through the link mechanism, and the vacuum valve 50 The internal electrode is separated.

  The main circuit is de-energized by the above operation. The operation of turning on the main circuit of the electromagnetically operated switchgear is omitted because it is the reverse operation of the shut-off operation.

  Next, an assembly method and a wipe amount adjustment method for the electromagnetically operated switchgear according to the present embodiment will be described with reference to FIG.

  First, an assembly method of the electromagnetically operated switchgear according to the present embodiment, that is, an assembly method of the insulator casting blocking part 48 and the shaft 2 will be described.

  In the method of assembling the electromagnetically operated switchgear according to the present embodiment, the main circuit side lever 15 of the shaft 2 has a direction in which the pin 34 in which the through hole 34A is formed is orthogonal to the through direction (vertical direction) of the through hole 34A. And an internal thread portion 40 is formed in the lower portion of the insulating rod 18, and a bolt 33 is inserted into the internal thread portion 40 of the insulating rod 18 through the through hole 34A of the pin 34, When the nuts 35 and 36 passed through the bolts 33 are tightened, the insulator casting blocking part 48 is connected to the main circuit side lever 15 of the shaft 2 and the insulating rod 18 of the insulator casting blocking part 48. Attach to the case 49 with mold fixing bolts 38 and 39, and attach the pin 34 with the through hole 34A to the main circuit side lever 15, and then fix the shaft 2 to the case 49. And after inserting the bolt 33 that has passed through the through hole 34A of the pin 34 into the female thread portion 40 formed in the lower part of the insulating rod 18, the shaft 35 is tightened by tightening the nuts 35 and 36 that are passed through the bolt 33. 2 and the insulating rod 18 are connected.

  That is, first, the insulator casting blocking part 48 is attached to the case 49 with the mold fixing bolts 38 and 39. The shaft 2 is fixed to the case 49 by attaching the pin 34 having the through hole 34 </ b> A to the main circuit side lever 15 and fixing both ends of the shaft main shaft 14 to the case 49 via the shaft bearing 12 with bolts or the like. Then, the bolt 33 passing through the through hole 34A of the pin 34 is inserted into the female screw portion 40 provided at the lower part of the insulating rod 18, and then the nuts 35 and 36 passed through the bolt 33 are tightened, whereby the shaft 2 and the insulating rod 18 are connected.

  By adopting such a structure, the shaft 2 and the insulator casting blocking portion 48 are independently attached (in the past, an intermediate plate was required when connecting the lever, but the intermediate plate is no longer necessary. As a result, the shaft 2 and the insulator casting blocking part 48 can be attached independently), and then the two can be connected to each other. Workability can be improved.

  Next, a wipe amount adjustment method for the electromagnetically operated switchgear according to the present embodiment will be described.

  In the method of adjusting the wipe amount of the electromagnetically operated switchgear according to the present embodiment, the main circuit side lever 15 has a pin 34 with a through hole 34A formed in a direction (vertical direction) perpendicular to the through direction (vertical direction) of the through hole 34A. The internal thread portion 40 is formed at the lower portion of the insulating rod 18 and the bolt 33 is inserted into the internal thread portion 40 of the insulating rod 18 through the through hole 34A of the pin 34. In adjusting the wipe amount of the electromagnetically operated switchgear to which the main circuit side lever 15 and the insulating rod 18 are connected by tightening the nuts 35 and 36 passed through the bolt 33, the main circuit side lever 15 and the insulating rod A tool (for example, a wrench) for turning the nuts 35 and 36 is inserted from the holes 54 and 55 provided in the case 49 covering the 18 connecting portions, and the bolt is turned by turning the wrench. By adjusting the insertion length of the third female threaded portion 40 is intended to adjust the wipe amount.

  The holes 54 and 55 provided in the case 49 described above are provided in the lower part of the bolt 33 and the extension line of the main circuit side lever 15, respectively, and the holes provided in the case 49 on the extension line of the main circuit side lever 15. 54, the wrench is inserted to loosen the nut 36, the wrench is inserted from the hole 55 provided in the lower portion of the bolt 33, the bolt 33 is turned, and the insertion size of the bolt 33 into the female thread portion 40 is changed to thereby change the wipe amount. I am trying to make adjustments. Thereby, the wipe amount can be easily adjusted.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to add, delete, and replace the configuration of a part of the configuration of the embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Auxiliary contact part, 2 ... Shaft, 3 ... Electromagnetic operation device, 4 ... Condenser, 5 ... Operation rod, 6 ... Counter, 7 ... Auxiliary contact, 8 ... Auxiliary contact lever, 9 ... Counter operation spring, 10 ... Counter lever 11 ... Lower plate, 12 ... Shaft bearing, 13 ... Auxiliary contact side lever, 14 ... Shaft main shaft, 15 ... Main circuit side lever, 16 ... Electromagnetic actuator side lever, 17 ... Connection bolt, 18 ... Insulating rod, 19 ... Fixed rod, 20 ... Mounting bolt, 21, 25 ... Mounting plate, 22 ... Permanent magnet, 23, 28 ... Plate, 24 ... Electromagnetic coil, 26 ... Operating rod, 27 ... Shut-off spring, 29 ... Operating plate, 30 ... Fixed belt 31 ... Lower plate, 32 ... Capacitor terminal, 33 ... Bolt, 34 ... Pin, 34A ... Through hole, 35, 36 ... Nut, 37 ... Washer, 38 DESCRIPTION OF SYMBOLS 39 ... Mold fixing bolt, 40 ... Female thread part, 41 ... Control board, 42 ... Control plug, 43 ... Moving cart, 44 ... On button, 45 ... Off button, 46 ... Lower conductor, 47 ... Upper conductor, 48 ... Insulator Casting block, 49 ... case, 50 ... vacuum valve, 51 ... movable conductor, 52 ... main circuit conductor, 53 ... wipe spring, 54,55 ... hole, 60 ... vacuum breaker.

Claims (3)

A movable iron core and a stationary iron core arranged opposite to each other and an electromagnetic coil for separating or contacting the movable iron core and the stationary iron core in accordance with electromagnetic force are covered with a case, and at the center of the case An electromagnetic operating device composed of arranged electromagnets, and a driving force accompanying an electromagnetic force generated by the electromagnet of the electromagnetic operating device is driven by the main circuit side by rotation of a main shaft of a shaft connected to the electromagnetic operating device via an operating plate. A vacuum circuit breaker having an insulator casting interrupting portion which is transmitted through a lever and an insulating rod, and which has a movable electrode and a fixed electrode which are arranged opposite to each other and spaced apart from or in contact with each other, and is integrally cast with an insulator; With
The main circuit side lever has a pin in which a through hole is formed, and is attached in a direction perpendicular to the through direction of the through hole, and a female screw portion is formed in a lower portion of the insulating rod. By inserting a bolt into the female thread portion of the insulating rod through a through hole and tightening a nut passed through the bolt, the main circuit side lever and the insulating rod are connected ,
The case covering the connecting portion between the main circuit side lever and the insulating rod is provided with a hole for inserting a tool for turning the nut to adjust the insertion dimension of the bolt into the female screw portion. And the holes are provided in the case on the lower part of the bolt and the extension line of the main circuit side lever, respectively . The electromagnetically operated switchgear according to claim 1,
The electromagnetically operated switchgear, wherein the nut is a single nut or a double nut. A movable iron core and a stationary iron core arranged opposite to each other and an electromagnetic coil for separating or contacting the movable iron core and the stationary iron core in accordance with electromagnetic force are covered with a case, and at the center of the case An electromagnetic operating device composed of arranged electromagnets, and a driving force accompanying an electromagnetic force generated by the electromagnet of the electromagnetic operating device is driven by the main circuit side by rotation of a main shaft of a shaft connected to the electromagnetic operating device via an operating plate. A vacuum circuit breaker having an insulator casting interrupting portion which is transmitted through a lever and an insulating rod, and which has a movable electrode and a fixed electrode which are arranged opposite to each other and spaced apart from or in contact with each other, and is integrally cast with an insulator; With
The main circuit side lever has a pin in which a through hole is formed, and is attached in a direction perpendicular to the through direction of the through hole, and a female screw portion is formed in a lower portion of the insulating rod. An electromagnetically operated switchgear in which the main circuit side lever and the insulating rod are connected by inserting a bolt into the female thread portion of the insulating rod through a through hole and tightening a nut passed through the bolt. When adjusting the wipe amount,
The case covering the connecting portion of the main circuit side lever and the insulating rod is provided with holes in the lower part of the bolt and on the extension line of the main circuit side lever, and on the extension line of the main circuit side lever. Insert a tool from the hole provided in the case to loosen the nut, insert the tool from the hole provided in the lower part of the bolt, rotate the bolt, and change the insertion dimension of the bolt into the female thread portion. A method for adjusting the wipe amount of an electromagnetically operated switchgear, wherein the wipe amount is adjusted.

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