JP2010273406A - Connection apparatus for electric apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection apparatus having joints formed in the same shape, to interconnect electric apparatuses, thereby facilitating molding work. <P>SOLUTION: The connection apparatus includes: a first electric apparatus part 1a which is provided with a first recessed interface joint 33 around a first center conductor 30, a second electric apparatus part 1b which is provided with a second recessed interface joint 12 around a second center conductor 9 connected and fixed to the first electric apparatus part 1a, and a close contact part 1c which is provided with a flexible insulator 39 with both ends projected to come close contact with the other's interface joints 33 and 12 around a third center conductor 38 which connects the first center conductor 30 with the second center conductor 9. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connection device for electrical equipment that connects electrical equipment such as vacuum valves molded with a solid insulator.

  Conventionally, in a solid-insulated switchgear, a technique is known in which electrical devices such as vacuum valves and bus bars are molded with an epoxy resin and connected to each other with a connecting device having an interface connection part (for example, Patent Documents). 1).

  As shown in FIG. 5, this type of connecting device includes a fourth electric device portion 1 d on the upper side in the drawing and a second electric device portion 1 b on the lower side in the drawing, with a middle portion in the vertical direction in the drawing as a boundary. ing.

  For example, a fourth insulating layer 3 molded with an epoxy resin is provided around the fourth central conductor 2 connected to the bus bar, for example, in the fourth electric equipment portion 1d. The end of the fourth central conductor 2 is exposed, and an annular contact 4 is provided on the outer periphery thereof. The end of the fourth insulating layer 3 is formed in a convex and conical fourth interface connecting portion 5, and a protruding quadrangular fourth flange portion 6 is provided on the outer periphery thereof. Through holes 7 are provided at the four corners of the fourth flange portion 6. On the outer periphery of the fourth insulating layer 3, a fourth ground layer 8 coated with a conductive paint is provided.

  In the second electrical equipment portion 1b, for example, a second insulating layer 10 molded with an epoxy resin is provided around a second central conductor 9 connected to a vacuum valve. The end of the second central conductor 9 is formed in a concave opening 11 so that the first central conductor 2 provided with the contact 4 is inserted. The end of the second insulating layer 10 is formed in a concave and conical second interface connecting portion 12, and a projecting quadrangular second flange portion 13 is provided on the outer periphery thereof. Fillers 14 are embedded in the four corners of the second flange portion 13. On the outer periphery of the second insulating layer 10, a second ground layer 15 coated with a conductive paint is provided.

  A flexible insulator 16 is inserted between the fourth interface connection portion 5 and the second interface connection portion 12, and the bolt 17 is passed through the through hole 7 and fastened to the filling 14, thereby The flange portion 6 and the second flange portion 13 are firmly connected and fixed. The thickness of the flexible insulator 16 is slightly larger than the gap formed between the fourth interface connection portion 5 and the second interface connection portion 12, and when the connection is fixed, A surface pressure is applied to the mutual interface connecting portions 5 and 12 by the repulsive force.

  On the other hand, when configuring a solid insulated switchgear, the first to fourth electric devices 18 to 21 are interface-connected as shown in FIG. One end of the main circuit of the first electrical device 18 corresponds to the concave second interface connection portion 12, and both ends of the main circuit of the second electrical device 19 correspond to the convex fourth interface connection portion 5, respectively. The one end of the main circuit of the third electric device 20 corresponds to the concave second interface connection portion 12 and the other end corresponds to the convex fourth interface connection portion 5, and one of the main circuits of the fourth electric device 20 The end corresponds to the concave second interface connection portion 12. That is, the first to fourth electric devices 18 to 21 are firmly connected and fixed to each other by the convex and concave interface connecting portions 5 and 12 so that good insulating characteristics and current-carrying characteristics can be exhibited. .

JP 2008-228467 A (3rd to 4th pages, FIG. 1)

  The above-described conventional electrical device connecting apparatus has the following problems. The first to fourth electric devices 18 to 21 are manufactured by using resin casting molds, filling with an insulating material, and heat-curing. The shape of the interface connecting portions 5 and 12 is concave at one end like the first electric device 18, convex at both ends like the second electric device 19, and convex like the third electric device 20. There are five types, both of which are concave, although not shown, both ends are concave and one end is convex.

  For this reason, in the manufacture of electrical equipment, it is necessary to prepare a resin casting mold in which convex and concave interface connecting portions 5 and 12 are combined. This requires preparing and storing a plurality of types of resin casting molds and checking the shape for each work, making casting work difficult. It is conceivable that the interface connecting portions 5 and 12 are fixed in a convex shape on one side and fixed in a concave shape on the other side, and the convex and concave shapes are connected to form a solid insulated switchgear. And placement becomes difficult, and the outer shape becomes large.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a connection device for an electrical device that unifies the shape of the interface connection portion into a concave shape and facilitates casting work.

  In order to achieve the above object, a connection device for an electrical device according to the present invention includes a first electrical device section provided with a concave first interface connection portion around a first central conductor, and the first electrical device section. Connecting the second electric device section provided with a concave second interface connection portion around the second center conductor fixedly connected to the device section, and the first center conductor and the second center conductor. And a contact means portion provided with a flexible insulating material having convex protrusions on both ends, which are in close contact with the mutual interface connecting portions, around the third central conductor.

  According to the present invention, the interface connecting portions at both ends of the electrical equipment are each concave, and the flexible insulating material with both ends protruding is inserted to fix the electrical equipment to each other. The shape can be unified and the casting work can be facilitated. Further, the outer shape of the solid insulating switch gear can be reduced in size.

Sectional drawing which shows the structure of the connection apparatus of the electric equipment which concerns on Example 1 of this invention. The principal part sectional drawing which shows the structure of the connection apparatus of the electric equipment which concerns on Example 2 of this invention. The principal part sectional drawing which shows the structure of the connection apparatus of the electric equipment which concerns on Example 3 of this invention. The principal part sectional drawing which shows the structure of the connection apparatus of the electric equipment which concerns on Example 4 of this invention. Sectional drawing which shows the structure of the connection apparatus of the conventional electric equipment. The principal part front view explaining the structure of the conventional solid insulation switchgear.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings for a connection device for electrical equipment according to the present invention.

  First, an electrical apparatus connecting apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view illustrating a configuration of a connection device for electrical equipment 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.

  As shown in FIG. 1, the electrical device connecting apparatus includes a first electrical device portion 1a on the upper side in the drawing, a close contact means portion 1c (corresponding to a third electrical device portion) on the middle portion in the drawing, It is comprised from the electric equipment part 1b.

  In the first electric device section 1a, for example, a first insulating layer 31 molded with an insulating material such as an epoxy resin is provided around a first central conductor 30 connected to a bus bar. The end surface of the first central conductor 30 is formed in a concave opening 32. The end of the first insulating layer 31 is formed in a concave and conical first interface connecting portion 33, and a projecting quadrangular first flange portion 34 is provided on the outer periphery thereof. Through holes 35 are provided at the four corners of the first flange portion 34. On the outer periphery of the first insulating layer 31, a first ground layer 36 coated with a conductive paint is provided.

  In the second electrical equipment portion 1b, for example, a second insulating layer 10 molded with the same insulating material as the third insulating layer 31 is provided around the second central conductor 9 connected to a vacuum valve. ing. The end surface of the second central conductor 9 is formed in the concave opening 11. The end of the second insulating layer 10 is formed in a concave and conical second interface connecting portion 12, and a projecting quadrangular second flange portion 13 is provided on the outer periphery thereof. Through holes 37 are provided at the four corners of the second flange portion 13. On the outer periphery of the second insulating layer 10, a second ground layer 15 to which a conductive paint similar to the third ground layer 36 is applied is provided.

  In other words, the first electric device portion 1a and the second electric device portion 1b are symmetrically arranged with respect to the close contact means portion 1c, and the interface connecting portions 33 and 12 have the same shape. The same shall include a dimensional error at the time of manufacture.

  The close contact means portion 1c is provided with a third central conductor 38, and a rhomboid first flexible insulator 39 formed of an elastic body such as silicon rubber or EP rubber is provided around the third central conductor 38. Yes. Both ends of the third central conductor 38 are exposed, and annular contacts 40 are respectively provided, inserted into the openings 32 and 11 and electrically connected. Further, the first flange portion 34 and the second flange portion 13 are firmly connected and fixed by passing the bolt 41 through the through holes 35 and 37 and tightening the nut 42.

  The first flexible insulator 39 has a convex conical shape at both ends in the axial direction, and is integrally formed around the third central conductor 38. The repulsive force of the first flexible insulator 39 is slightly larger than the space formed when the first interface connecting portion 33 and the second interface connecting portion 12 are combined and fixed. Thus, a surface pressure is applied to the interface connecting portions 33 and 12.

  It should be noted that annular insulating spacers 43 are provided at the upper and lower ends of the first flexible insulator 39 in the figure, respectively, and escape to the central conductors 30 and 9 when the first flexible insulator 39 is compressed. Is preventing. The first flexible insulator 39 may be formed by directly molding the third central conductor 38, or a previously molded one may be inserted into the third central conductor 38.

  Thereby, the 1st electric equipment part 1a and the 2nd electric equipment part 1b have the same concave shape in mutual interface connection parts 33 and 12, can unify a shape pattern, and resin casting mold The type of mold can be reduced. Basically, it is possible to unify resin casting molds into one type, and it becomes unnecessary to confirm the shapes of the interface connecting portions 33 and 12, and the casting work can be facilitated.

  Further, since the shape of the first flexible insulator 39 can be made one type, the assembly work of the solid insulation switch gear can be facilitated, rational arrangement is also possible, and the overall shape is small. Can be achieved.

  According to the electrical apparatus connecting apparatus of the first embodiment, the first interface 39 and the second interface 12 are recessed, and the first flexible insulator 39 protruding at both ends is provided. Since the first electric device portion 1a and the second electric device portion 1b are inserted and fixed to be connected, the first interface connecting portion 33, the second interface connecting portion 12, and the first flexible portion are connected. The shape of the conductive insulator 39 can be unified, and the casting work can be facilitated. Further, the assembly work of the solid insulation switch gear can be facilitated.

  Next, an electrical apparatus connecting apparatus according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view of the main part showing the configuration of the connection device for electrical equipment according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in the configuration of the close contact means portion. 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, a diamond-shaped third insulating layer 44 molded with epoxy resin is provided around the third central conductor 38. Then, a taper-shaped second flexible insulator 45 is provided on the outer periphery of the third insulating layer 44 and in close contact with the first interface connection portion 33 and the second interface connection portion 12. Provided. That is, both ends in the axial direction of the second flexible insulator 45 are convex. The thickness of the second flexible insulator 45 is slightly larger than the gap formed by the third insulating layer 44, the first interface connection portion 33, and the second interface connection portion 12.

  According to the electrical apparatus connecting apparatus of the second embodiment, in addition to the effects of the first embodiment, the third insulating layer 44 is harder than the second flexible insulator 45, so the first interface connecting portion. The surface pressure to 33 and the 2nd interface connection part 12 comes to be applied reliably.

  In the second embodiment, the third insulating layer 44 has been described in a rhombus shape. However, the third insulating layer 44 may have an oval shape, a plate shape, or the like, and if it is harder than the second flexible insulator 45, the second possible layer is used. A surface pressure due to the repulsive force of the flexible insulator 45 can be applied.

  Next, an electrical apparatus connecting apparatus according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view of the main part showing the configuration of the electrical device connecting apparatus according to Embodiment 3 of the present invention. The third embodiment is different from the second embodiment in that a grounding member is provided on the outer periphery of the contact means portion. In FIG. 3, the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the outer periphery of the second flexible insulator 45 where the first interface connecting portion 33 and the second interface connecting portion 12 are combined is formed with an annular shape formed by molding conductive rubber. A grounding member 46 is provided. In addition, ground layers 47 are provided on the surfaces of the first interface connection portion 33 and the second interface connection portion 12, respectively, so as to have the same potential as the ground member 46. Note that the ground member 46 may be integrally molded with one second flexible insulator 45 or may be provided alone.

  According to the electrical apparatus connecting apparatus of the third embodiment, in addition to the effects of the second embodiment, the potential of the surface where the first interface connecting portion 33 and the second interface connecting portion 12 are combined is fixed to the ground potential, The potential distribution can be kept good.

  Next, an electrical apparatus connecting apparatus according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the main part showing the configuration of the electrical device connecting apparatus according to Embodiment 4 of the present invention. The fourth embodiment is different from the third embodiment in the shape of the second flexible insulator. In FIG. 4, the same components as those in the third embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, in the second flexible insulator 45, the insulating thickness of the inner peripheral portion is linearly thicker than the outer peripheral portion. The gap formed by the first interface connecting portion 33 and the second interface connecting portion 12 is the same from the outer peripheral portion to the inner peripheral portion, and the second flexibility is larger than the formed gap at the outer peripheral portion. The insulation thickness of the insulator 45 is slightly increased.

  According to the electrical apparatus connecting apparatus of the fourth embodiment, in addition to the effect of the third embodiment, the surface pressure on the inner peripheral side where the electric field strength is likely to increase can be increased. Insulation characteristics can be improved.

DESCRIPTION OF SYMBOLS 1a 1st electric equipment part 1b 2nd electric equipment part 1c 3rd electric equipment part 1d Contact | adherence means part 2, 9, 30, 38 Center conductor 3, 10, 31, 44 Insulating layer 4, 40 Contactor 5, 12, 33 Interface connection part 6, 13, 34 Flange part 7, 35, 37 Through hole 8, 15, 36, 47 Ground layer 11, 32 Opening 14 Filling 16, 39, 45 Flexible insulator 17, 41 Bolt 18 First electrical device 19 Second electrical device 20 Third electrical device 21 Fourth electrical device 42 Nut 43 Insulating spacer 46 Grounding member

Claims (5)

A first electrical device portion provided with a concave first interface connection portion around the first central conductor;
A second electric device portion provided with a concave second interface connection portion around a second central conductor connected and fixed to the first electric device portion;
Adhering means in which a flexible insulating material having convex protrusions on both ends is provided around the third central conductor connecting the first central conductor and the second central conductor, and the both ends are in close contact with each other. And
An apparatus for connecting electrical equipment, comprising:   The electrical apparatus connection device according to claim 1, wherein the flexible insulator is formed integrally with the third central conductor.   The electrical apparatus connection device according to claim 1, wherein the flexible insulator is provided on an outer periphery of an insulating layer provided around the third central conductor.   The electrical apparatus connection device according to any one of claims 1 to 3, wherein a grounding member is provided on an outer peripheral portion of the flexible insulator.   5. The electrical apparatus connection device according to claim 3, wherein an inner peripheral portion of the flexible insulator is thicker than an outer peripheral portion.

Images