JP6290775B2 - Electromagnetic switchgear - Google Patents

Description

  The present invention relates to an electromagnetically operated switchgear, and more particularly to an electromagnetically operated switchgear suitable for opening and closing a switch such as a vacuum circuit breaker using the electromagnetic force of the electromagnetically operated device.

  A vacuum circuit breaker, which is one of electromagnetically operated switchgears, may need to be replaced with a vacuum valve due to specification changes or maintenance.

  However, the conventional insulator casting blocking part that constitutes the vacuum valve, when exchanging the vacuum valve, the shaft part that connects to the actuator that operates the insulator casting blocking part interferes with the replacement work, It was in a situation where the bolts for fixing the insulator casting blocking part could not be reached.

  For this reason, in order to replace the vacuum valve, it is necessary to remove the shaft part that interferes with the replacement work.However, the shaft part is fixed to the operating device, and in order to remove the shaft part, the shaft part must be fixed. It was necessary to remove the operating device.

  Moreover, since the operating device is normally covered with a case, when removing an operating device, it is necessary to remove the case which has covered the operating device.

  Therefore, when exchanging the vacuum valve, it is necessary to remove the shaft portion, the operating device, and the case, which requires a lot of time.

  As fixing means for solving such problems, there is one described in Patent Document 1.

  In this patent document 1, it is illustrated that the case covering the bottom of the insulator casting blocking part and the operating unit is bolted via an intermediate fixing plate, and the insulator casting blocking part is released by releasing the bolt fixing. Can be removed from the case.

China Utility Model Notification No. 202678204

  However, the configuration in which the insulator casting blocking part and the case described in Patent Document 1 are bolted via the intermediate fixing plate is up to the middle of the bolt fixing part arranged at the bottom of the insulator casting blocking part. The fixing bolt is fixed to the formed hole through the hole formed in the intermediate fixing plate, and the hole formed in the bolt fixing part is only halfway, and the fixing bolt penetrates the bolt fixing part. Therefore, there is a possibility that a fracture occurrence portion may occur in the bolt fixing portion due to a difference in elastic modulus when stress is generated, and there is a problem that reliability is poor.

  The present invention has been made in view of the above-described points, and the object of the present invention is to easily inject an insulator even in a configuration in which the insulator casting blocking portion and the case are bolted via an intermediate fixing plate. It is an object of the present invention to provide an electromagnetically operated switchgear capable of improving the fixing reliability as well as removing the shape blocking portion.

  In order to achieve the above object, an electromagnetically operated switchgear according to the present invention has a movable iron core and a fixed iron core arranged opposite to each other, and a coil that separates or contacts the movable iron core and the fixed iron core according to electromagnetic force. In addition, an operating device composed of an electromagnet disposed in the center of the case, and a movable electrode and a fixed electrode disposed opposite to each other, are covered with a case, and the electromagnetic force generated by the electromagnet of the operating device is A vacuum circuit breaker having an insulator casting interrupting portion that is separated or contacted via a link mechanism including a driving rod, a lever, and an insulating rod, and is integrally cast with an insulator, The shape blocking part and the case are fixed with fixing bolts via an intermediate fixing plate, and the intermediate fixing plate is formed with a bolt fixing hole and below the insulator casting blocking part. Bol so as to cover the surroundings A fixing portion is installed, a hole similar to the bolt fixing hole is formed in the bolt fixing portion, and the fixing bolt penetrates the hole of the bolt fixing portion through the bolt fixing hole of the intermediate fixing plate; It is characterized by being.

  According to the present invention, even if the insulator casting blocking part and the case are bolt-fixed via the intermediate fixing plate, the insulator casting blocking part can be easily removed and, of course, the reliability of the fixing is fixed. An electromagnetically operated switchgear that can improve the performance can be obtained.

It is a front view which shows Example 1 of the electromagnetically operated switchgear of the present invention. It is a top view of the electromagnetic operation type switchgear of the present invention shown in FIG. It is a right view of the electromagnetically operated switchgear of the present invention shown in FIG. FIG. 2 is a left side view including auxiliary contacts, a display board, and a counter of the electromagnetically operated switchgear according to the present invention shown in FIG. 1. It is the figure seen from the direction of the arrow 270 of FIG. FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 4 when an intermediate fixing plate is provided for each phase. It is sectional drawing which follows the BB 'line of FIG. 6A. It is sectional drawing which follows the CC 'line of FIG. 6A. It is sectional drawing which shows the fixation structure of the intermediate fixing plate using the fixing bolt to the conventional bolt fixing | fixed part. It is sectional drawing which shows the fixing structure of the intermediate fixing board using the fixing bolt to the bolt fixing | fixed part of this invention. It is sectional drawing which shows the fixing structure of the intermediate fixing plate using the fixing bolt to the bolt fixing | fixed part by the side of the operation device of this invention. FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 4 when the intermediate fixing plate is common to three phases. It is sectional drawing which follows the BB 'line of FIG. 9A. It is sectional drawing which follows the CC 'line of FIG. 9A. It is sectional drawing which follows the AA 'line of FIG. 4 in the other example at the time of making an intermediate | middle fixing plate common to 3 phases. It is sectional drawing which follows the BB 'line of FIG. 10A. It is sectional drawing which follows the CC 'line of FIG. 10A. It is sectional drawing which follows the DD 'line of FIG. 10A. It is a right view which shows Example 2 of the electromagnetically operated switchgear of this invention. It is a right view which shows the modification of Example 2 of the electromagnetically operated switchgear of this invention.

  The electromagnetically operated switchgear according to the present invention will be described below based on the illustrated embodiment. In addition, in each Example, the same code | symbol is used for the same component.

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 the present embodiment includes an electromagnetic operating device (operator) 11 composed of an electromagnet 14 and a driving force associated with the electromagnetic force generated by the electromagnet 14 as a driving rod, lever, and insulating rod. And a vacuum circuit breaker 32 having an insulator casting interrupting part 228 (229, 230) that is transmitted through a link mechanism and is integrally cast with an insulator, and the insulator casting interrupting part 228 and the case 10 Are fixed by fixing bolts via an intermediate fixing plate 197 and are generally configured. Details of these will be described below.

  As shown in FIGS. 1 to 3, the electromagnetic operating device 11 includes a case 10 formed in a box shape. The case 10 has an opening 12 on the front side, and on the back front side of the case 10, A front cover (not shown) is detachably fixed.

  In the center of the case 10, a capacitor 16 is arranged on one side with the electromagnet 14 as the center, and a control board 18 is separately arranged on the other side, and the electromagnet 14 is arranged via a rib 172. 10 is fixed using bolts and nuts (fixing tools 173), and the capacitor 16 and the control board 18 are fixed to the opposite side surfaces of the case 10, respectively. That is, the capacitor 16 is fixed to the left side surface of the case 10 using a bolt and a nut via a belt (not shown) as viewed from the front side of the paper in FIG. 1, and the control board 18 is fixed to the right side surface of the case 10. It is fixed using bolts and nuts via spacers 20.

  Further, in the case 10, as shown in FIG. 4, an auxiliary contact 34 for sending the open / close state of the vacuum circuit breaker 32 to the outside, a display board 36 for displaying the open / close state, and a counter 38 for counting the number of open / close operations, It is housed on the plate 171 fixed to the case 10 above the capacitor 16.

  Reference numeral 22 denotes a secondary plug, which is fixed so as to be hooked on the upper side of the case 10. The secondary plug 22 is connected to a power cable, a signal cable 28 from a digital relay or an analog relay, and the like. ing. The signal cable 28 is connected to the auxiliary contact 34 and the control board 18 inside the case 10.

  The control board 18 receives the supply of power from the secondary plug 22 and receives a closing command or an opening command (breaking command) from a digital relay or an analog relay, and performs a logical operation for controlling the driving of the electromagnet 14. A control logic unit, a charging / discharging circuit for charging / discharging the capacitor 16, a relay or a relay contact for controlling the energization direction of the coil 48 are mounted.

  In addition, a light emitting diode 50 indicating that charging of the capacitor 16 is completed is mounted on the control board 18, and an “ON” push button switch 52 for instructing the vacuum circuit breaker 32 to be turned on manually. And, a “cut” push button switch 54 for outputting an opening command (break command) to the vacuum circuit breaker 32 by manual operation is mounted.

  Next, the electromagnet 14 will be described. As shown in FIG. 3, the electromagnet 14 is formed in a cylindrical shape with a movable iron core 58, a fixed iron core 60, a coil 48, a shaft 62, two movable flat plates 64 and 66, and a permanent magnet 68. Iron covers 70 and 72, an iron support plate 76, and a fixing rod 78 are included. The coil 48 is housed in a coil bobbin 48a disposed between the support plate 74 and the support plate 76. Yes.

  A shaft 62 is arranged in the vertical direction at the center of the electromagnet 14, the upper side of the shaft 62 is inserted into the through holes 82 of the plates 64 and 66, and the lower side is a support plate 76 and a support plate 174. Is inserted into the through hole 84. Thereby, the shaft 62 can be raised and lowered freely.

  A movable iron core 58 and movable flat plates 64 and 66 are fixed to the shaft 62 using nuts on the outer peripheral surface of the shaft 62, and a shaft (drive rod) is connected to the lower side of the shaft 62 via a pin (not shown). ) 88 are connected. Two large and small movable flat plates 64 and 66 (the lower movable flat plate 66 is large and the upper movable flat plate 64 is small) are attached to the shaft 62. This is because the movable portion secures the necessary magnetic flux density. This is to reduce the mass and energy required for operation.

  Further, a support plate 90 is connected to the lower side of the shaft 62, and a ring-shaped cutoff spring 92 that draws a circle centering on the axis of the shaft 62 between the support plate 90 and the lower plate 80. Is attached (one end of the blocking spring 92 is attached to the lower plate 80). The cutoff spring 92 applies an elastic force for separating the movable iron core 58 from the fixed iron core 60 to the shaft 62 via the support plate 90.

  A permanent magnet 68 is disposed below the movable flat plate 66 around the movable iron core 58, and the permanent magnet 68 is fixed to the upper side of the support plate 74. The fixed iron core 60 is fixed to the support plate 76 using bolts.

  The lower plate 80 is provided with a shock absorber 190 supported by the lower plate 80 and a stopper 191 on the opposite side of the capacitor 16 from the electromagnet 14 of the lower plate 80. The stopper 191 is provided at a position closer to the shaft 98 than the shock absorber 190. The shock absorber 190 is fixed to the lower plate 80 through a nut 194, and the height can be adjusted by rotating the nut 194.

  The stopper 191 is fixed by inserting a thin plate 195 between the stopper 191 and the height of the stopper 191 can be adjusted by changing the thickness of the thin plate 195 to be inserted.

  The shock absorber 190 is provided with a spherical adapter 192 on the side opposite to the electromagnet 14 in the height direction, and the shaft 98 is supported so as to be rotatable with respect to the shaft 98 with the shaft 98 as a rotation axis. A lever 193 is provided, and the lever 193 contacts both the spherical adapter 192 and the stopper 191 when the vacuum circuit breaker 32 is opened. The upper surface of the lever 193 is formed to be parallel to the floor surface on which the vacuum circuit breaker 32 is installed at the time of opening. The shock absorber 190 and the stopper 191 are arranged on the side opposite to the capacitor 16 (control board 18 side) with respect to the electromagnet 14.

  In other words, in the present embodiment, the lower plate 80 has both a role of suppressing the cutoff spring for fixing the cutoff spring 92, a role of supporting the shock absorber 190, and a role of supporting the stopper 191. Further, the central axis of the shock absorber 190 and the central axis of the electromagnet 14 coincide with the depth direction of the paper surface of FIG. 3, and the distance between the shaft 98 extending in the depth direction of the paper surface and the central axis of the shock absorber 190, The distances between the central axes of 14 are equal (at the same distance).

  Therefore, the lever 193 that contacts the shock absorber 190 via the spherical adapter 192 and the lever 96 connected to the electromagnet 14 can have the same shape, thereby reducing the types of components, Easy to manufacture. Further, the electromagnet 14 is fixed to the case 10 on the side of the vacuum circuit breaker 32 via a fixture 173.

  Further, the lower side of the shaft 88 is further connected to a pair of levers 96 via pins 94. The lever 96 is configured as one element of a link mechanism that changes the transmission direction of the driving force accompanying the electromagnetic force generated from the electromagnet 14, is supported by the shaft 98, and rotates integrally with the shaft 98. It has become. The shaft 98 also supports the lever 100, and the lever 100 is rotated by the rotation of the shaft 98 when the lever 96 is rotated.

  As shown in FIG. 4, a lever 186 is connected to the operation rod 170 connected to the display plate 36, and the lever 186 is supported by the shaft 98. The lever 186 extends to the opposite side of the lever 100 when viewed from the shaft 98. The lever 100 described above is connected to the insulating rod 114 via the pin 102.

  Further, as shown in FIG. 3, a wiping mechanism (not shown) for applying a contact pressure is incorporated inside the insulating rod 114, and the flexible conductor 121 having flexibility is provided on the upper side of the insulating rod 114. Is connected to the movable feeder conductor 122 provided in the horizontal direction via the, and is also connected to the movable conductor 124 of the vacuum circuit breaker 32. The movable conductor 124 is connected to the movable electrode 124A, and a fixed electrode 125A is disposed opposite to the movable electrode 124A. The fixed electrode 125A is connected to the fixed conductor 125. These are housed together with the movable electrode 124A in an insulating cylinder 126 constituting the vacuum circuit breaker 32, and the vacuum circuit breaker 32 is kept in a vacuum.

  Further, the fixed conductor 125 is connected to a fixed feeder conductor 129 provided in the horizontal direction. The upper contact 130 which is a blocking portion contactor is connected to the fixed feeder conductor 129, and the blocking portion is connected to the movable feeder conductor 122. A lower contact 132 that is a contact is connected, and a conductor of a switchboard is connected to the upper contact 130 and the lower contact 132.

  The fixed feeder conductor 129 and the movable feeder conductor 122 are separated in the height direction, and the vacuum circuit breaker 32 arranged in the height direction (vertical direction) electrically connects the two. .

  Then, when the movable electrode 124A inside the vacuum circuit breaker 32 comes into contact with the fixed electrode 125A, a current is supplied, and the fixed feeder conductor 129 and the movable feeder conductor 122 are electrically connected. On the other hand, when the movable electrode 124A is opened from the fixed electrode 125A, the fixed feeder conductor 129 and the movable feeder conductor 122 are opened.

  Further, in this embodiment, as shown in FIG. 2, a predetermined capacitance is secured by combining three capacitors 16. The electric power accumulated by these three capacitors 16 is energized to the coil 48 to generate a magnetic field, thereby realizing a closing or opening operation. The direction of energization of the power stored in the capacitor 16 to the coil 48 is controlled by the control board 18.

By adopting such a configuration, the occupied area is increased as compared with a case where a predetermined capacitance is ensured by one capacitor, but the height of the capacitor 16 can be reduced, so that the space above the capacitor 16 can be reduced. Can be secured widely, and maintainability can be improved. Needless to say, the number of capacitors 16 is not limited to three.

  As shown in FIGS. 1 and 4, the auxiliary contact 34, the display panel 36, and the counter 38 are arranged on the side of the electromagnet 14 and on the top of the capacitor 16 as a state detection mechanism of the vacuum circuit breaker 32. The plate 171 is fixed.

  As shown in FIG. 4, the side of the operating rod 170 opposite to the side connected to the lever 186 is connected to the display board 36 via a pin 136. Since the operating rod 170 moves together with the shaft 98 via the lever 186, the state of the vacuum circuit breaker 32 (turned on or off) can be specified from the position of the operating rod 170. Since the display board 36 is connected to the operation rod 170 via the pin 144, the display board 36 also operates in accordance with the state of the vacuum circuit breaker 32, and the current state of the vacuum circuit breaker 32 is indicated by its operating position. Can show.

  The display board 36 is connected to the counter 38 and pays attention to the relationship that the number of operations of the movable electrode 124A of the vacuum circuit breaker 32 = the number of operations of the operating rod 170 = the number of operations of the display board 36. The number of operations of the movable electrode 124A of the vacuum circuit breaker 32 is counted from the number of operations. A lever 138, a pin 142, and a pin 136 are provided between the operation rod 170 and the auxiliary contact 34.

  Next, the structure of the intermediate fixing plate 197 and its surroundings, which is a feature of the present embodiment, will be described with reference to FIGS.

  As shown in FIGS. 5 and 6A, the intermediate fixing plate 197 is provided in each of the insulator casting blocking portions 228, 229, and 230. That is, the intermediate fixing plate 197 is provided for each phase. 6A to 6C, each intermediate fixing plate 197 has a bolt fixing hole 301, an operation shaft passage hole 302, and a bolt fixing hole 303. The case 10 has a bolt fixing hole 301, An operation shaft passage hole 302 and a bolt passage hole 300 are provided. The intermediate fixing plate 197 is on the upper contact 130 and lower contact 132 side of the case 10. The insulator casting blocking portion 228 (229, 230) is fixed to the case 10 via the intermediate fixing plate 197 by passing a fixing bolt 260 (described later) through the bolt fixing hole 301.

  That is, as shown in FIG. 5, bolt fixing portions 216, 217, 218, 219, 220, and 221 made of an insulating material are installed so as to cover the lower peripheries of the insulator casting blocking portions 228, 229, and 230. . The bolt fixing portions 216, 217, 218, 219, 220, and 221 are integrated with the insulator casting blocking portions 228, 229, and 230, respectively. The bolt fixing portions 216, 217, 218, 219, 220, and 221 have holes similar to the bolt fixing holes 301, and each hole is provided with a female screw that engages with a male screw of the fixing bolt 260. The fixing bolt 260 is passed through the holes of the bolt fixing portions 216, 217, 218, 219, 220, and 221 through the bolt fixing holes 301 of the case 10 and the intermediate fixing plate 197, thereby casting the three-phase insulator. The blocking portions 228, 229, and 230 are integrally fixed to the intermediate fixing plates 197 and are fixed to the case 10. In the present embodiment, the total number of fixing bolts 260 is six.

  Further, the bolt passage hole 300 provided in the case 10 is on the operating unit (electromagnetic operating device 11) side of the insulator casting blocking portions 228, 229 and 230, and moreover than the outer diameter of the head of the fixing bolt 261. The fixing bolt 261 only passes through the bolt passage hole 300 of the case 10 when the insulator casting blocking portions 228, 229, 230 are mounted, and is not related to fixing. Moreover, as shown in FIG. 4, the bolt fixing | fixed part 254 is provided in the position facing the bolt fixing | fixed part 221 at the operating device side of the vacuum circuit breaker 32 which has an insulator cast-type interrupting | blocking part. Although not shown, similarly, bolt fixing portions 254 are provided at positions facing the bolt fixing portions 216, 217, 218, 219, and 220, respectively. These bolt fixing portions 254 are also integrated with the insulator casting blocking portions 228, 229, and 230, respectively. The bolt fixing portion 254 includes holes similar to the bolt fixing holes 303, and each hole is provided with a female screw that engages with a male screw of the fixing bolt 261. Insulator casting is performed by penetrating the fixing bolt 261 through the bolt fixing hole 303 of the intermediate fixing plate 197 through the inside of the hole of the bolt fixing portion 254 on the operation unit side of the insulator casting blocking portions 228, 229, and 230. The blocking portions 228, 229, and 230 are fixed to the intermediate fixing plate 197. Therefore, the insulator casting blocking portions 228, 229, and 230 are fixed to the intermediate fixing plate 197 by the fixing bolts 260 and 261, respectively. In the present embodiment, the total number of fixing bolts 261 is six.

  The operation shaft passage hole 302 provided in the insulator casting blocking portions 228, 229, and 230 is a hole through which the operation shaft connected to the insulating rod 114 that transmits the drive from the electromagnetic operation device 11 passes.

FIG. 7A shows a conventional fixing bolt portion, and FIG. 7B shows a bolt fixing portion 216 which is one of the fixing bolt portions of this embodiment.
As shown in FIG. 7A, in the conventional fixing bolt portion, the fixing bolt 260 does not penetrate the bolt fixing portion 216. When the coil is energized, an electromagnetic force 232 is generated in the direction shown in FIGS. 3 and 4, and the electromagnetic force 232 also acts on the bolt fixing portion 216 and the fixing bolt 260 as shown in FIG. 7A. When the electromagnetic force 232 is generated, a portion surrounded by a thick frame (portion indicated by reference numeral 272) extends to the contact surface side with the fixing bolt 260 and the side opposite to the contact surface with the fixing bolt 260. However, the fixing bolt 260 is prevented from extending and the portion surrounded by the thick frame cannot be extended, and stress concentrates on the side opposite to the contact surface with the fixing bolt 260. As a result, a crack is generated in a portion surrounded by a thick frame, and a fracture generating portion 272 can be generated. In addition, a fracture occurrence portion 272 may occur in the bolt fixing portion 216 due to a difference in elastic modulus between the fixing bolt 260 and the bolt fixing portion 216 when stress is generated.

  In particular, as in the present embodiment, due to the shaft portion being in the way and not being reachable, the insulator casting blocking portion 228 (229, 230) is fixed to the case 10 with the operating device side. When it is performed only on the opposite side, the stress generated by the influence of the electromagnetic force is received by a small number of fixing bolts, so that the stress is concentrated on the fracture occurrence portion 272.

  On the other hand, in the structure of the present embodiment shown in FIG. 7B, the fixing bolt 260 passes through the bolt fixing portion 216 and there is no portion surrounded by the thick frame shown in FIG. . Further, the fracture occurrence portion 272 due to the difference in elastic modulus does not occur when stress is generated. For this reason, the bolt fixing | fixed part 216 which reduced the influence of stress can be obtained. The same applies to the other bolt fixing portions 217, 218, 219, 220, and 221.

  In this embodiment, the bolt fixing portion 254 on the operating device side is also as shown in FIG. That is, also in the bolt fixing portion 254, the fixing bolt 261 penetrates the bolt fixing portion 254, and no breakage occurs. The bolt fixing portion 254 does not concentrate a large stress unlike the bolt fixing portions 216, 217, 218, 219, 220, and 221. Therefore, the fixing bolt 261 does not need to penetrate therethrough.

Next, how to remove the insulator casting block 230 will be described with reference to FIGS.
First, the intermediate fixing plate 197 and the case 10 and the bolt fixing portion 220 are similarly fixed to the fixing bolt 260 fixing the case 10 and the bolt fixing portion 221 and the rear fixing direction of FIG. Remove the other fixing bolt 260. On the operating device side, the fixing bolt 261 remains fastened to the bolt fixing portion 254. Thereafter, the insulator casting blocking part 230 is lifted from the case 10 at a right angle together with the intermediate fixing plate 197. Thereby, the insulator casting blocking part 230 can be removed from the case 10 without removing the operation device side fixing bolt 261 and the other fixing bolt 261 on the back side. Also, the insulator casting blocking portions 228 and 229 arranged side by side in the depth direction can be similarly removed.

  By adopting such a configuration of the present embodiment, it is possible to easily cast the insulator even if the insulator casting blocking portions 228, 229, 230 and the case 10 are bolted via the intermediate fixing plate 197. Of course, the shape blocking portions 228, 229, and 230 can be removed, and it is possible to improve the reliability of bolt fixing performed between the insulator casting blocking portions 228, 229, and 230 and the case 10 via the intermediate fixing plate 197. it can.

  In the above-described embodiment, the intermediate fixing plate 197 is provided for each phase. However, as shown in FIGS. 9A to 9C, the intermediate fixing plate 197 may be a single intermediate fixing plate common to three phases. 6A to 6C except that the intermediate fixing plate 197 is common to three phases.

  Further, when the intermediate fixing plate 197 is a single intermediate fixing plate common to the three phases, as shown in FIGS. 10A to 10D, without providing the bolt passage hole 300 in the case 10 on both sides on the operating device side, It is more desirable that the bolt fixing hole 301 is provided in the same manner as the position corresponding to the bolt fixing portion 216 and the bolt fixing portion 254 is added to the intermediate fixing plate 197 with the fixing bolt and fixed to the case 10. That is, the both sides on the operating device side can easily access the fixing bolt, and the insulating cast-type blocking portion is securely fixed by being attached to the case 10 at a location including the four corners of the intermediate fixing plate 197. Except on both sides on the operating device side, the bolt passage hole 300 is provided in the case 10 as in the case of FIGS. 6A and 6B, and the ease of removal of the insulator casting blocking portions 228, 229, 230 is ensured. .

In this embodiment, even if the insulator casting blocking part and the case are bolted via an intermediate fixing plate, the insulator casting blocking part can be easily removed, of course, the insulator casting blocking Provided is an electromagnetically operated switchgear that can improve the rigidity of the contact surface between the portion and the intermediate fixing plate.
That is, the electromagnetically operated switchgear according to the present embodiment has a movable iron core and a stationary iron core arranged opposite to each other, and a coil that separates or contacts the movable iron core and the stationary iron core according to electromagnetic force, and is covered with a case. In addition, an operating device composed of an electromagnet arranged in the central part of the case, and a movable electrode and a fixed electrode arranged opposite to each other, drive a driving force associated with an electromagnetic force generated by the electromagnet of the operating device. A vacuum circuit breaker having an insulator casting interrupting portion that is separated or contacted via a link mechanism including a rod, a lever, and an insulating rod and is integrally cast with an insulator, and the insulator casting interrupting portion and the The case is fixed with fixing bolts via an intermediate fixing plate, and the contact-side end portion and / or the operation device-side end portion of the intermediate fixing plate is bent upward or downward. Features.
In this embodiment, it is possible to obtain an electromagnetically operated switchgear that can improve the rigidity of the contact surface between the insulator casting blocking part and the intermediate fixing plate as well as easily removing the insulator casting blocking part. it can.

Hereinafter, Example 2 of the electromagnetically operated switchgear according to the present invention will be described in detail with reference to FIG.
As shown in FIG. 11, in this embodiment, the contact-side end portion 400 of the intermediate fixing plate 197 of the insulator casting blocking portion 228 is bent at a right angle downward with respect to the contact surface of the case 10 (folded upward). It does not matter.) Other configurations are the same as those of the first embodiment.
According to the configuration of this embodiment, the same effect as that of Embodiment 1 can be obtained, and the contact-side end portion 400 of the intermediate fixing plate 197 of the insulator casting blocking portion 228 is bent. Thereby, the rigidity of the contact surface of the insulator casting blocking part 228 and the intermediate fixing plate 197 can be improved.

FIG. 12 shows a modification of the second embodiment.
In the embodiment shown in FIG. 11, only the contactor side end portion 400 of the intermediate fixing plate 197 is bent at a right angle downward with respect to the contact surface of the case 10, but in the embodiment shown in FIG. For example, in addition to the configuration of the second embodiment, as shown in FIG. 12, the operation unit side end 401 of the intermediate fixing plate 197 is bent at a right angle upward with respect to the contact surface with the case 10 (even if it is bent downward). It does not matter). Other configurations are the same as those of the first embodiment.
According to the configuration of this embodiment, the same effect as that of the embodiment shown in FIG. 11 can be obtained, and the operation device side end 401 of the intermediate fixing plate 197 is placed on the upper side with respect to the contact surface of the case 10. The rigidity of the contact surface between the insulator casting blocking portion 228 and the intermediate fixing plate 197 can be further improved by bending the wire at a right angle to each other.

  Example 2 mentioned above demonstrated in the example of the structure added to the structure of Example 1, However, The structure which bolts an insulator casting interruption | blocking part and a case via an intermediate fixing plate is a conventional structure, Needless to say, the effect of improving the rigidity of the contact surface between the insulator casting blocking portion and the intermediate fixing plate can be achieved by adding the configuration of the second embodiment.

  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. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 10 ... Case, 11 ... Electromagnetic operating device, 12 ... Opening, 14 ... Electromagnet, 16 ... Capacitor, 18 ... Control board, 20 ... Spacer, 22 ... Secondary plug, 28 ... Signal cable, 32 ... Vacuum circuit breaker, 34 ... Auxiliary contact, 36 ... display board, 38 ... counter, 48 ... coil, 48a ... coil bobbin, 50 ... light emitting diode, 52 ... "on" pushbutton switch, 54 ... "off" pushbutton switch, 56,171 ... plate 58 ... movable iron core, 60 ... fixed iron core, 62, 88, 98 ... shaft, 64, 66 ... movable flat plate, 68 ... permanent magnet, 70, 72 ... cover, 74, 76, 90, 174 ... support plate 78 ... fixed Rod, 80 ... Lower plate, 82, 84 ... Through hole, 94, 102, 136, 144 ... Pin, 92 ... Blocking spring, 96, 100, 186, 193 ... Lever, 114 Insulating rod, 121 ... Flexible conductor, 122 ... Movable feeder conductor, 124 ... Movable conductor, 124A ... Movable electrode, 125 ... Fixed conductor, 125A ... Fixed electrode, 126 ... Insulating tube, 129 ... Fixed feeder conductor, 130 ... Upper contact , 132, lower contact, 170, operating rod, 172, rib, 173, fixture (bolt, nut), 190, shock absorber, 191, stopper, 192, spherical adapter, 194, nut, 195, thin plate, 197, intermediate Fixing plate, 216, 217, 218, 219, 220, 221, 254 ... bolt fixing part, 228, 229, 230 ... insulator casting blocking part, 250 ... operation mechanism part, 260 ... fixing bolt, 261 ... operator side Fixing bolts, 272 ... fracture occurrence parts, 300 ... bolt passing holes, 301, 303 ... bolt fixing holes 302 ... operating shaft passing hole 400 ... contact end, 401 ... operation-side end portion.

Claims (2)

An electromagnetic operating device housed in a case;
A vacuum circuit breaker having an insulator casting interrupter integrally cast with an insulator;
A link mechanism that transmits a driving force from the electromagnetic operating device to a movable part that supports a movable electrode of the vacuum circuit breaker;
The insulator casting blocking part is attached to the case using a fixing bolt via an intermediate fixing plate,
The intermediate fixing plate has bolt fixing holes for fixing bolts formed on the electromagnetic operating device side and the electromagnetic operating device on the opposite side of the insulator casting blocking portion,
The case includes a bolt fixing hole for fixing a bolt formed at a position corresponding to a bolt fixing hole on a side opposite to the electromagnetic operating device formed on the intermediate fixing plate, and the above-described case formed on the intermediate fixing plate. It is formed at a position corresponding to the bolt fixing hole on the electromagnetic operating device side, and has a bolt passage hole larger than the outer diameter of the head of the fixing bolt,
The insulator casting blocking portion includes a plurality of bolt fixing portions integrally formed at a lower portion, and a part of the plurality of bolt fixing portions is provided on the electromagnetic operating device side formed on the intermediate fixing plate. A through hole is formed at a position corresponding to the bolt fixing hole and engages with the fixing bolt, and another part of the plurality of bolt fixing portions corresponds to the bolt fixing hole on the side opposite to the electromagnetic operating device. An electromagnetically operated switchgear having a through hole formed at a position where the fixing bolt engages. The electromagnetically operated switchgear according to claim 1 ,
The intermediate fixing plate is provided as an intermediate fixing plate common to the three phases of the insulator casting blocking portion,
An electromagnetic operation type wherein bolt fixing holes are also formed at positions corresponding to the bolt fixing holes on the electromagnetic operation device side formed on the intermediate fixing plate on both sides of the case on the electromagnetic operation device side. Switchgear.

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