TW591833B - Structure for connecting busbar of switch gear - Google Patents

Abstract

The object of this invention is to provide a structure for connecting busbar of a switch gear which has less component number, easier operation for connecting and lower cost, wherein each T-shaped bushing is respectively fitted in airtight to a closed container filled with insulation gas so that each terminal end of branch conductor can be electrically connected to power supply circuit, and the opposite terminal ends of neighboring busbars can be adjacently and co-axially arranged. The opposite terminal ends of neighboring busbars are slidably enclosed by a connection conductor for maintaining electrical contact. An insulation tube of elastic material is axially expanded to enclose the opposite two insulators so as to cover the connection conductor and the opposite terminal ends of two neighboring bus bars, and the conductive films of the opposite two insulators can be electrically shortened by a conductive layer for earth.

Description

591833 — ~~ —_ V. Description of the invention (1) [Technical field to which the invention belongs. This service is related to a kind of bus connection structure when open power supply circuits are connected to each other in a sealed gas-insulated container [prior art]. ^ The connection structure of the head busbar is connected ~ The sleeves I a extending from the container are placed adjacent to the arc-shaped body of the insulating gas-tight cross-section and the end of the connecting conductor, and the end of the body is tightened from the bottom Adhere to the sleeve conductor and the connecting conductor and the dissipating conductor. Electrical connection: Connect to the V body, and pass through the connection force cone 安, stomach M # & guide limb. In addition, the rubber should be made of the heart: ί! The connecting material of the tube conductor and the connecting conductor, further Λ Λ on each stress cone to protect the insulation of the connection part (for example, Japanese Patent Laid-Open No. 2 0 0 2- 2 3 833 5). However, in the province-known busbar connection structure, in order to connect the two insulated and closed containers with the busbar, t requires a pair of sleeves, a connecting conductor, two pairs of coupling η ^ bodies, two stress cones, and two covers, so Causes the number of parts = reduced connection workability, and at the same time, there is a problem that the cost can not be achieved. [Inventive Content] / The present invention aims to obtain a bus bar of a switching device that reduces structural parts, improves connection work, and reduces cost. Connection structure. According to the present invention, the T-shaped sleeve is electrically connected to the end of the branch conduit to a private circuit, and the end of the bus bar is air-tightly installed to each of the insulating gas-tight containers in an adjacent and coaxial arrangement, and the guide is connected. One side of the system is in phase

314254.ptd

Page 6 type externally embedded, paired ends to maintain electrical connection to the head office ~ Opposite, 'but shaped like a B made of elastic material, one side is made of sliding cubes to form the bus bar end, and is insulated by burial ^ The piping system covers the connecting conductor and the extended son's electrical film. The electrical γ ground is electrically insulated with electrical conduction. [Implementing the square shape, sire's 'embedded in the opposite': way, in the direction of the diameter.] Battle against insulators. In the following, the present invention will be described with reference to the drawings < best embodiment >彳 View, FIG. 2 is a sectional view showing an insulation tube of a main connection structure suitable for a complex busbar connection structure, ~ 3rd connection diagram of the busbar connection structure of the busbar switchgear of the switchgear of the present invention is applicable to the present invention A cross-sectional view illustrating a bus connecting conductor of the switch device of the present invention, FIG. 4 is a diagram, and FIG. 5 is a cross-sectional view of a main part illustrating an enlarged cross-sectional view of a main part of a switch of the present invention. The connection of the bus connection structure of the clothes is shown in the drawings. The switchgear is a plurality of insulated gas-tight containers 1 彳, and an insulating gas 3 such as SF fluorine gas. The power supply circuit 2 in the body-tight container 1 is t ~~. , Stored in each insulating gas. In addition, the T-shaped sleeve 4 is connected to each other by the T-shaped sleeve 4 through the T-shaped sleeve, and the insulated gas-tight T-shaped sleeve 4 connected to the container 1 is housed in a frame (not shown) to make a cross-section: shape. From the busbar 5 and the linear busbar 5 and the divergent conductor 6 which are perpendicular to the longitudinal direction, exposed at both ends of the busbar 5 < a fractional formula extending in the central portion of the longitudinal direction, for example, epoxy resin and the branched conductor The square bar at the end of 6 ', Haowu 7 is buried in the bus bar 5 and the branch conductor 6

591833 V. Description of Invention (3) In addition, both ends of the portion where the bus bar 5 of the insulator 7 is buried are formed into a cylindrical shape with a large-diameter portion 7a and a small-diameter portion 7b and a segment formed between the large-diameter portion and the small-diameter portion 7b. . Also, for the large diameter part 2, the boundary part ⑽ and the boundary part between the segment part 7c and the small rear part 7b; J forms a curved surface with a radius of 2. In addition, the radius of the curved surface may be as long as: 此: Here, the large diameter portion 7a and the segment portion 7c are connected by a smooth left and right segment portion and the small diameter portion are also connected by a smooth continuous surface. Connected ,,,,. I ιδ ^ ^ ^ ^ ^: The formula is recessed on the inverse part of the crotch part 7f = 7f; ^ branched conductor 6? 7 branched conductor extended from f: f, which is electrically connected from the insulation and power supply circuit work . W "... Dreated grain processing 'makes it electrically conductive. The electrically conductive coating 8 is connected to the bus bar 5 and the branch conductor film 8 to the outer surface of the insulator 7. This conductivity Be ^ #, ^ ί; r1 There is a conductive part f in the small-diameter part 7b. The section 7 is nearby. Although the electrical shape is covered by the mold 8 in the vicinity, no guide groove is formed in the small-diameter part, and the conductor 10 is connected. It is made into a cylindrical shape and a ring-shaped recess: ^-^---The Vc part is embedded in the groove 1 〇b, and the center hole 10a

From the outer periphery of the center of Dosan 7. Yaqi, ring Zhuang 4 standing ^ A out of a part > + "Mountain ^, chanting contactor 1 1 line 591833 V. Description of the invention (4) The inner diameter is slightly larger than the diameter of the bus bar 5, and the contactor 1 1 The inner diameter is formed slightly smaller than the diameter of the bus bar 5. The outer diameter of the connecting conductor 10 is approximately the same as the outer diameter of the small-diameter portion 7 b of the insulator 7. As shown in FIG. 2, the insulating tube 12 has a three-layer structure formed of the following components: a cylindrical insulator 1 3 made of an electrically insulating elastic material; and an integrally formed inner periphery of the insulator 13 The conductive layer for electric field relaxation 14 composed of a conductive and elastic material with a flat surface is integrally formed on the insulator 13 so as to cover the outer surface of the insulator 13 and both edges of the inner peripheral surface, and is made of a conductive elastic material The grounding conductive layer 15 is formed. In addition, the convex portion 14a is formed in a ring shape so that the central portion of the electric field relaxation conductive layer 14 is protruded inward in the radial direction. The convex portion 1 4 a is formed in a shape of a ring-shaped groove 10 c fitted in the connection conductor 10. The inner diameter of the insulating tube 12 is formed to be slightly smaller than the outer diameter of the small-diameter portion 7b of the insulating layer 7. In addition, the length of the insulating tube 12 is formed to be slightly shorter than the distance between the sections 7 c of the T-shaped sleeve 4 mounted on the adjacent insulating gas-tight container 1, and the length of the conductive layer 14 for electric field relaxation is It is formed longer than the distance between the front ends of the small-diameter portions 7b. Here, for example, a silicon resin, a polyethylene resin, or the like is used as an elastic material having electrical insulation properties. Further, for example, a material to which carbon is added, such as a stone resin and a polyethylene resin, is used as an elastic material having conductivity. Next, a bus connection method of the power supply circuit 2 will be described. First, the insulated gas-tight containers 1 accommodating the power supply circuit 2 are arranged side by side. Furthermore, the branched conductor side of the T-shaped sleeve 4 is inserted through the opening 1 b of the mounting portion 1 a penetrating the insulated gas-tight container 1, and the end portion of the branched conductor 6 is electrically connected to the power supply circuit 2. Next, the flange portion 7 f is fixed to the bolt 17.

314254.ptd Page 9 591833 V. Description of the invention (5) Install the fixed part 1 a, and install the T-shaped sleeve 4 in the insulated gas-tight container 1. At this time, the 0-ring 16 as the gasket is fitted into the annular groove 7g of the flange portion 7f to ensure the airtightness of the insulating gas-tight container 1. Insulating gas 3 such as SF is enclosed in an insulating gas-tight container 1. Thereby, the connection conductor 10 is externally fitted to the end portion of the bus bar 5. At this time, the connecting conductor 10 is pushed in such a manner as to approach the small-diameter portion 7b of the insulator 7, and by contacting the child 11, it is brought into electrical contact with the bus bar 5. Next, an insulating tube 12 coated with an insulating lubricant 18 on the inner peripheral surface from the end portion side of the bus bar 5 is externally fitted to the insulator 7. At this time, the insulating tube 12 is pushed into the insulating tube 12 so as to be picked off from the large-diameter portion 7 a of the insulator 7. Therefore, the insulating tube 12 is expanded outward in the diameter direction and is attached to the large-diameter portion 7a. Next, the T-shaped sleeve 4 is attached to an adjacent insulating gas-tight container 1. Thereby, as shown in Fig. 5, the ends of the bus bars 5 of the T-shaped bushing 4 are in contact with each other and are coaxially arranged. Further, the open side of the insulating tube 12 is expanded outward in the diameter direction, and at the same time, the insulating tube 12 is moved to the fitting position of the convex portion 14a and the groove 10c in the direction indicated by the arrow in Fig. 5. Therefore, when the expansion of the insulating tube 12 is released, the insulating tube 12 contracts inward in the diameter direction, and the convex portion 1 4 a is fitted into the groove 10 c. Thereafter, the insulating tube 12 is moved to the position of the small-diameter portion 7b of the insulating portion 7 in the direction indicated by the arrow in FIG. 5. With the movement of this insulating tube 12, the connecting conductor 10 is slidingly moved on the busbar 5, and finally, one side of the connecting conductor 10 is externally embedded in the opposite busbar 5, and the connecting conductor 10 and the contactor 1 1 Make the busbars 5 electrically connected. That is, the power supply circuit 2 in the two insulated gas-tight containers 1 is electrically connected. At this time, as shown in Figure 1, the insulation tube

314254.ptd Page 10 591833 V. Description of the invention (β) Straight ί = f is connected to the end of the conductor 10 and the opposite busbar 5, and is externally embedded in the opposite insulator in a state of widening toward 7b n之 小径 部 # | 5 作 帝: The conductive coating 8 of the insulator 7 is connected to the ground by a conductive charge 埴 ^. Further, as shown in Fig. 4, an insulating lubricating oil 18 is filled in a gap between the two-edge pipe 12 and the small-diameter portion 7b of the insulator 7. This operation is performed only by p? 1-L, so that the insulating gas contained in the side-by-side arrangement is densely packed. The power supply circuits 2 in 1 are electrically connected to each other. , F, in the case of electrically cutting off the power supply circuit 2, grasp the insulation tube ㈣ 二 ί: move to one side of the bus 5 side. Thereby, the connecting conductor trunk 5 is slid and moved to the square bus 5 side, and the supply 2 is electrically cut off. In addition, if the insulating tube 12 is further moved to the side of the bus bar 5, the connecting conductor 10 abuts on the ends of the small-diameter portion to prevent Jiang Xu from exceeding this level. Α Sand recognition 4 mountain people <Hedong. Therefore, 肷 3 of the convex portion 14a and the groove 10c is released, and only the insulating tube 12 is moved, while expanding in the diameter direction, and resting on the large-diameter portion 7a to form the state shown in FIG. When checking the pile Ϊ, the insulation tube 12 is moved to the side of one bus bar 5 and the connecting conductor 10 is exposed, and the main circuit resistance can be measured. According to this busbar connection structure, free of charge — Μ ^ pair T sleeve 4, one connection f :: piece: electrical circuit 2 is connected by-, so the number of parts can be reduced ^ insulation tube 12 and low cost connection Into. In addition, the connection between the busbars 5 can be achieved by simultaneously realizing the workability of 3 f9f:; ,, Table 2 ... Moreover, the interface between the insulators ^ a ^ can be improved. And the reliability of the Ministry. In addition, because of the flexible connection between the female and the spring, the insulation tube 1 2 was made from raw materials.

314254.ptd Page 11 591833 V. Description of the invention (7) The outer diameter is smaller than the small-diameter portion 7b. Therefore, when the insulating tube 12 is externally fitted to the small-diameter portion 7b, a contraction force will be generated toward the inside of the diameter direction. In this way, the state in which the insulating tube 12 is externally fitted to the small-diameter portion 7b is surely ensured. Since both ends of the portion where the bus bar 5 of the insulator 7 is buried are formed with a large-diameter portion 7a and a small-diameter portion 7b formed from the large-diameter portion 7a through the section 7c, a cylinder with a section is formed. Therefore, the movement of the insulating tube i 2 due to vibration and the like can be restricted by the small-diameter portion 7 b, and accidental exposure of the connecting conductor 10 can also be avoided. The shape injury is also a curved surface at the boundary portion 7d of the large-diameter portion 7a and the segment portion 7c, so that it can be suppressed when the insulating tube 12 moves, and the damage to the insulation tube 12 is caused by the boundary portion of the segment portion 7c and the small-diameter portion 7b. The 7e series has a curved shape, so that the insulating tube 2 can be smoothly moved from the small-diameter portion 7b to the large-diameter portion. The shifting action or the shifting action from the large-diameter portion 7 a to the small-diameter portion 7 b. In addition, because the “Ba margin oil know 18 series” is filled between the insulating tube 12 and the small diameter portion 7 b, it can stop the reduction of the withstand voltage performance or partial discharge performance caused by the air gap. The insulation tube 2 moves smoothly. Since the convex portion 14a protrudes from the conductive layer for electric field relaxation, the :: 2: 11: 'annular groove 10 is formed. It is formed on the central outer peripheral surface of the connecting conductor 10 in the length direction. Therefore, the insulating tube portion 14a and the groove 10c are embedded in each other. The electrical cut-off body 10 moves to make the supply-heart failure, and the reliability of the Yama bus connection. Also, due to the convexity at the portion of the branched conductor 6 where the insulator 7 is buried,

314254.ptd Page 12 591833 V. Description of the invention (8) The O-ring 16 is sandwiched between the edge portion 7 and the mounting portion 1 a of the insulated gas-tight container 1, and the flange portion 7 g is fixed to the mounting portion 1 a Therefore, the airtightness of the insulated gas-tight container 1 can be ensured. In addition, although the above embodiment has been described in the case where the contactor 11 is mounted on the connection conductor 10, the contactor 11 may also be mounted on the bus bar 5. As described above, the bus-bar connection structure of the present invention can be used in a case where power supply circuits housed in an insulated gas-tight container constituting a switchgear are connected to each other outside the container.

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Claims (1)

591833 repair fP spike culture Case No. 91136469 Amendment 6. Scope of patent application 1. A busbar connection structure of a switching device, which is adjacently arranged to contain a plurality of insulated gas-tight containers for power supply circuits, is characterized by having: a T-shaped sleeve, A straight bus bar made into a circular cross-section, a branch conductor extending perpendicularly from the central portion of the length direction of the bus bar, and the bus bar is buried so that both ends of the bus bar and the ends of the branch conductor are exposed. An insulator of the branch conductor, and a conductive film formed on the outer surface of the insulator in a state of being electrically isolated from the bus bar and the branch conductor; a cylindrical connecting conductor; and an insulating tube having: A cylindrical insulator made of an electrically insulating elastic material, a conductive layer for electric field mitigation composed of an electrically conductive elastic material integrally formed on the inner peripheral surface of the insulator, and covering the outer surface and inner periphery of the insulator The two edges of the surface are integrally formed on this insulator and are made of a conductive elastic material The conductive layer for grounding; the T-shaped bushing electrically connects the ends of the branched conductors to the power supply circuit, and the ends of the busbars are hermetically mounted to the insulated gas-tight container in an adjacent and coaxial arrangement, respectively. ; The above-mentioned connection guide system maintains the electrical contact state at the paired ends opposite to the above-mentioned bus bar, and is externally embedded in a slidable manner; the above-mentioned insulation pipe system covers the above-mentioned connection conductor and the opposite end of the above-mentioned bus bar, so that The method for electrically short-circuiting between the pair of conductive coatings opposite to the insulator by the conductive layer for grounding is as follows: Hi 3] 4254 (revised version) .ptc page 16 591833 Case No. 91136469 6. Scope of patent application Edges facing the diameter. 2. As in the patent application, the junction between the large-diameter part and the upper part of the insulation tube with the large-diameter part is buried 3. As in the patent application, the insulation is wetted. 4. As in the patent application, the convex part is a conductor for relaxation, and the annular groove is the peripheral surface. 5. In the application for a patent, the insulation gas of the flange portion is embedded in the busbar connection structure of the switching device of the first pair of the above-mentioned absolute range in the state of the insulation correction and expansion. The two ends of the above-mentioned bus bar are shaped and formed from the large-diameter part through the segment part, and the cylindrical part with the upper part and the small-diameter part is embedded, and the boundary part of the above-mentioned segment part and The step portion and the small diameter system form a curved shape. The busbar connection structure of the switching device of the second item in the range, the oil is filled in the insulation tube and the busbar connection structure of the switch device of the first item in the range of the small diameter portion, which protrudes from the center of the inner periphery of the insulation tube. The part of the electric field layer is formed in a ring shape, and the busbar connection structure of the switch device fitted to the convex part formed in the first outside range of the center length direction of the connecting conductor is formed in the buried insulator. The T-shaped cannula of the branch duct is such that a gasket is interposed between the flange portion and the upper airtight container, and the flange portion is fixedly mounted with a gas tight container. 314254 (revised) .ptc Page 17