KR20040010177A - Manufacturing method of vacuum switch gear - Google Patents

Abstract

PURPOSE: To provide a vacuum switchgear with high reliability. CONSTITUTION: Respective structural elements are divided into unit parts, and respective parts are divided into a group of parts(movable electrodes 176-) to be arranged to an upper plate 12 side and a group of components(fixed electrodes 178-) to be arranged to a lower plate 14 side, and divided into the parts with insulation property(insulation bushings 122-) and parts without insulation property. Brazing material is inserted between the parts without insulation property and those parts group is heated at 960°C to braze respective parts with each other. Next, the brazing material is inserted between the parts to be brazed(supporting bases 118-) and those parts group is heated at 835°C to braze respective parts with each other. Next, an environmental area of the upper sheet material 12 on which, the upper parts group is fixed, the lower sheet material 14 on which, the lower parts group is fixed, and a side sheet material 16 are fixed by the TIG welding in inert gas atmosphere to tightly seal the vacuum container 10.

Description

Manufacturing method of vacuum switch gear {MANUFACTURING METHOD OF VACUUM SWITCH GEAR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a vacuum switch gear, and more particularly, to a method of manufacturing a vacuum switch gear suitable for use as a power distribution facility of an electric power system, having a plurality of switches housed in a vacuum container.

The switchgear is installed in the power distribution system of the power system as an element of the water distribution facility. Conventionally, many kinds of air insulation type have been adopted as this kind of switch gear. However, in order to achieve miniaturization, a gas insulation type using SF ₆ gas is adopted as the insulating medium. By the way, when SF ₆ gas is used as the insulating medium, there is a possibility that it will adversely affect the environment. Recently, a vacuum insulating method using vacuum insulation has been proposed as the insulating medium.

As a switchgear of a vacuum insulation system, as described, for example, in Unexamined-Japanese-Patent No. 2000-268685, several pairs of main circuit opening-and-closing parts in which a fixed electrode and a movable electrode are arrange | positioned facing each other are accommodated, The movable electrode is connected to the bus side conductor, the fixed electrode is connected to the load side conductor, each main circuit opening and closing part is covered with an arc shield, and each bus side conductor is configured to be connected via a flexible conductor. According to this switch gear, since the vacuum insulation system is adopted, the insulation distance can be made shorter than the gas insulation system, and the switch gear can be made compact.

In the above prior art, since each main circuit opening and closing part is covered with an arc shield, a trip operation is performed in a short circuit accident or the like, and even if metal vapor is generated from each electrode when the movable electrode and the fixed electrode are separated, the metal vapor is arc shielded. It can be shielded by. However, if a portion of the metal vapor scatters from the gap of the arc shield and adheres to the vacuum container when the vacuum container is grounded, current flows from the electrode to the ground point through the metal vapor and the vacuum container, resulting in a ground fault. .

Further, in the prior art, the load-side conductor is connected to the load-side electrode bar, and a part of the load-side electrode bar protrudes from the vacuum container, and the protruding portion is covered with the cylindrical insulator, and one end side of the cylindrical insulator is fixed to the wall surface of the vacuum container. The other end side is sealed by the sealing member, and the vacuum gap is formed between the cylindrical insulator and the load side electrode bar. In other words, a vacuum gap is provided between the cylindrical insulator and the load-side electrode bar in order to alleviate the electric field concentration caused by the dielectric constant difference between the metal and the insulator.

However, even in forming a vacuum gap between the cylindrical insulator and the load side electrode bar, it is necessary to increase the vacuum gap in order to alleviate the electric field concentration, and the diameter of the entire cable head including the load side electrode bar and the cylindrical insulator becomes thicker. As a result, the occupied space becomes wider and workability deteriorates. In addition, an impact generated when the movable electrode contacts the fixed electrode at the time of closing the switch is transmitted to the sealing member via the load-side electrode bar, and the tensile force in the reverse direction acts on the sealing member and the cylindrical insulator, respectively, and the cylindrical insulator and the sealing member There is a possibility that the strength of the bonding surface of the resin may decrease.

An object of the present invention is to provide a method for producing a highly reliable vacuum switch gear.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional front view of an essential part of a vacuum switch gear showing an embodiment of the present invention.

FIG. 2 is a plan view of the vacuum switch gear shown in FIG. 1; FIG.

Fig. 3 is a sectional side view of the main part of the vacuum switch gear shown in Fig. 1;

4 is a circuit configuration diagram of the vacuum switch gear shown in FIG.

Figure 5 (a) is a view for explaining a manufacturing method of the vacuum switch gear, a configuration diagram of the upper plate member is arranged the upper component group, Figure 5 (b) is the upper plate member 12 is fixed to the upper component group Side view).

Figure 6 (a) is a view for explaining the manufacturing method of the vacuum switch gear according to the present invention, a plan view of the lower plate member is fixed to the lower part group, Figure 6 (b) is a lower part of the lower part group is fixed Side view of the plate.

7 is a view for explaining a method for manufacturing a vacuum switch gear according to the present invention, and for explaining a working method when welding the upper plate, the lower plate and the side plate in an inert gas.

Fig. 8 is a sectional front view of the main part showing a state after the vacuum switch gear according to the present invention is assembled;

9 is a schematic diagram for explaining another embodiment of the present invention.

Fig. 10 is a sectional front view of an essential part when the present invention is applied to a vacuum switch gear having three disconnectors and three grounding switches.

Fig. 11 is a sectional front view of the main part of the present invention when the present invention is applied to a vacuum switch gear having two disconnectors and two grounding switches.

Fig. 12 is a sectional front view of an essential part of the present invention applied to a vacuum switch gear having one breaker and one grounding switch;

Fig. 13 (a) is a front view of the main part when the three-phase switchgear is accommodated in the vacuum switch gear, and Fig. 13 (b) is a side view of the main part when the three-phase switchgear is accommodated in the vacuum switchgear.

<Explanation of symbols for the main parts of the drawings>

10: vacuum container

12: upper plate

14: lower plate

16: side plate

34, 36, 40: operation rod

38: support rod

48, 50, 52: cable head

54, 56: Earthing switch

58, 60: disconnector

62: breaker

64, 66: earth bus conductor

68, 70, 72: bus bar conductor for energized circuit

96, 98, 164: flexible conductor

120: load side load

122: insulating bushing

168, 170: movable electrode rod

176, 194: movable electrode

178, 196: fixed electrode

180, 198: fixed electrode rod

182: electrode shield

184, 186: insulating shield

In order to solve the above problems, the present invention is a plurality of switchgear is accommodated in a vacuum container consisting of an upper plate, a lower plate and a side plate, the operation rod is connected to one end side of each switch, respectively, the load side rod on the other end side Is connected, and when manufacturing a vacuum switch gear in which the periphery of each load side rod is respectively covered with an insulating bushing, each component of the vacuum switch gear is divided into parts, and each divided part is divided into the upper plate. Divided into the upper parts group arrange | positioned at the side and the lower parts group arrange | positioned at the said lower board side, and divide each component group into the parts which have insulation, and other components, and insert a solder material between parts other than the parts which have insulation. And heating these component groups to a specified temperature to solder each component to each other. A solder material is inserted between the parts to be soldered, and the parts group is heated to a temperature lower than the temperature specified above to solder each part, and then the upper plate member and the lower part group to which the upper part group is fixed are fixed. A method of manufacturing a vacuum switch gear is adopted, wherein the surroundings of the lower plate and the side plate are fixed by welding in an inert gas to seal the vacuum container.

In addition, the present invention provides a plurality of vacuum containers composed of an upper plate, a lower plate, and a side plate, and a movable electrode held in the movable electrode rod and a fixed electrode held in the fixed electrode rod face each other. A plurality of operating rods connected to the switch, one or more busbar conductors connected to the movable electrode rods or the fixed electrode rods of the switchgear, and a portion of the operating rods connected to the movable electrode rods of the switchgear, and a part thereof connected to the manipulator outside the vacuum vessel And a plurality of load side rods connected to the fixed electrode rods of the respective switches, the portions of the load side rods protruding out of the vacuum vessel, and a plurality of insulating bushings disposed in and out of the vacuum vessel to cover the periphery of the load side rods. And each switch is disposed around the movable electrode and the fixed electrode to be aligned with the movable electrode. Each structure of the said vacuum switch is produced when manufacturing the vacuum switchgear comprised from the cylindrical electrode shield which prevents the scattering of the metal vapor | steam which arises from the fixed electrode, and the cylindrical insulating shield which covers the periphery of the said electrode shield. The element is divided into parts, and each divided part is divided into an upper part group disposed on the upper plate side and a lower part group disposed on the lower plate side, and parts other than parts having insulation among the component groups. Inserting and heating the solder material in between, and after the solder material is melted and cooled to solder each component to each other, the upper part group is fixed to the upper plate member, and the lower part group is fixed to the lower plate member Next, soldering is performed between the component having the insulation and the component to be soldered to the component having the insulation. Inserting and heating the ash, the solder member is melted and then cooled to solder the insulating component and the component to be soldered to the insulating component, and then the upper plate member and the lower part of which the upper component group is fixed. The lower plate member fixed to the component group is disposed to face each other, the side plate member is disposed adjacent to the upper plate member and the lower plate member, and the upper plate member and the side plate member are welded, and the lower plate member and the side member member are welded. The method of manufacturing a vacuum switch gear is adopted, wherein a plate is welded to evacuate the inside of the vacuum container, and the vacuum container is sealed.

When employ | adopting the manufacturing method of the said vacuum switch gear, it can be comprised as what has the following elements as a vacuum switch gear.

(1) a vacuum container comprising an upper plate, a lower plate, and a side plate, a plurality of switchgear housed in the vacuum container so that the movable electrode held in the movable electrode rod and the fixed electrode held in the fixed electrode rod face each other; At least one bus bar conductor connected to a movable electrode rod or a fixed electrode rod of each switch, a plurality of operation rods connected to the movable electrode rod of each switch, a part of which is connected to each manipulator outside the vacuum vessel; And a plurality of load side rods connected to the fixed electrode rods of the respective switches, the plurality of load side rods protruding out of the vacuum vessel, and a plurality of insulating bushings disposed in and out of the vacuum vessel to cover the periphery of the load side rods. And each switch is disposed around the movable electrode and the fixed electrode, so that the movable electrode and the fixed electrode A cylindrical electrode shield for preventing the scattering of metal vapor generated from the pole and a cylindrical insulating shield covering the periphery of the electrode shield, wherein the bus conductor is fixed to the vacuum vessel, and the operation of each switch is performed. The electrode rod is connected to the bus bar conductor via a flexible conductor.

(2) a vacuum container comprising an upper plate, a lower plate, and a side plate, and a plurality of switches housed in the vacuum container so that the movable electrode held in the movable electrode rod and the fixed electrode held in the fixed electrode rod face each other; At least one bus bar conductor connected to a movable electrode rod or a fixed electrode rod of each switch, a plurality of operation rods connected to a movable electrode rod of each switch, a part of which is connected to a manipulator outside the vacuum vessel; A plurality of load side rods connected to the fixed electrode rods of the respective switches, a part of which protrudes out of the vacuum vessel, and a plurality of insulating bushings disposed around the inside of the vacuum vessel and covering the periphery of the load side rods, Each of the insulating bushings is part of which is held in the vacuum container and is held on the wall of the vacuum container. Eojinda.

When employ | adopting the manufacturing method of each said vacuum switch gear, the following elements can be added.

(1) A conductive film is formed on opposing surfaces of the load side rods of the plurality of insulating bushings.

According to the above-mentioned means, when soldering each component group, it divides into parts which have insulation, and other components, and performs it in two processes, and soldering of each process is performed at different temperature, Therefore, parts having insulation and other than that are performed. Each part can be soldered reliably, and it becomes possible to contribute to the improvement of reliability.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described based on drawing. 1 is a cross-sectional front view of an essential part showing an embodiment of a vacuum switch gear according to the present invention, FIG. 2 is a plan view of the vacuum switch gear shown in FIG. 1, FIG. 3 is a side view of the vacuum switch gear shown in FIG. 4 is a circuit configuration diagram of the vacuum switch gear shown in FIG. 1 to 4, the vacuum switch gear is configured with a vacuum container 10 made of stainless steel as one element of the water distribution equipment in the power distribution system. The vacuum vessel 10 includes an upper plate 12, a lower plate 14, and a side plate 16, and the periphery (edge) of each plate is joined to each other by welding, and each side portion of each side is angled. In order to withstand the vacuum pressure even if the sheet thickness of the sheet is made thin, the sheet is throttled into a corrugated shape and grounded together with the installation main body. In addition, although the three-phase part is accommodated in the vacuum container 10 as an element which comprises a vacuum switchgear, in this embodiment, only a daily part is shown as a container of each phase separation.

The exhaust pipe 18 and the vacuum measurement terminal 20 are fixed to the upper plate 12, and through holes 22, 24, 26, 28, and 30 are formed. The grounding operation rod 32 is inserted into the through hole 22 so as to reciprocate (up and down), and the operating rods 34 and 36 for switchgear are reciprocated (up and down) in the through holes 24 and 26. The support rod 38 for covering is inserted into the through hole 28 so as to reciprocate (up and down movement), and the operation rod 40 for the switchgear can be reciprocated (up and down movement) in the through hole 30. Is inserted. On the other hand, through holes 42, 44 and 46 are formed in the lower plate 14, the cable head 48 of # 1 is inserted into the through hole 42, and the cable of # 2 into the through hole 44. The head 50 is inserted, and the cable head 52 of # 3 is inserted in the through hole 46.

In addition, the vacuum vessel 10 is evacuated from the inside via the exhaust pipe 18, and the inside of the vacuum vessel 10 is a switch, which is a ground switch 54, 56, a disconnector 58, 60, a breaker. At the same time, the ground bus bar conductors (ground bus bar) 64 and 66 made of copper and the bus bar conductors 68, 70 and 72 for conducting circuits made of copper are housed. In addition, the support members 74, 76, 78, 80, 82, 84, and 86 are housed in the vacuum vessel 10. The supporting members 74, 76, and 78 have one end side fixed to the upper member 12, and the other end side fixed to the bus bar conductor 68 to support the bus bar conductor 68. As for the support member 80, one end side is fixed to the lower board | plate material 14, and the other end side is fixed to the bus bar conductor 66, and the bus bar conductor 66 is supported. The supporting members 82, 84, and 86 are respectively fixed at one end side to the lower member 14, and the other end side is fixed to the bus bar conductor 70 so as to support the bus bar conductor 70.

The grounding operation rod 32 for manipulating the opening and closing of the grounding switch 54 includes a cylindrical ground terminal 88, a cylindrical lifting ceramic movable rod 90, a bellows 92, and a substantially disc-shaped base 94. ), Flexible conductors 96 and 98, a connecting rod 100 made of stainless steel, a connecting rod 102 made of copper, and a movable electrode 104 made of copper. The ground terminal 88 is provided with a screw portion 106, and a grounding manipulator (not shown) is fastened to the screw portion 106 so that the ground terminal 88 is grounded. In addition, the bellows 92 is fixed to the upper plate 12, the movable rod 90 is connected to the opening side end of the bellows 92, and the base 94 is connected to one end in the axial direction of the movable rod 90. Is fixed. In other words, the periphery of the ground terminal 88 is sealed by the base 94, the movable rod 90, and the bellows 92. The movable rod 90 is joined to the flexible conductor 96 together with the base 94, and the base 94 is joined to the ground bus conductor 64. In addition, the flexible conductor 98 is joined to the ground busbar conductor 64 and to the connecting rod 102. A connecting rod 100 is inserted into an axis of the connecting rod 102, and the connecting rod 100 has a rod insertion hole penetrating through the flexible conductor 98, the bus bar conductor 64, and the flexible conductor 96. Slidably inserted into the 108a to 108d, the axial end thereof is connected to the ground terminal 88. That is, when the ground terminal 88 reciprocates (up and down), the connecting rod 100 slides in the rod insertion holes 108a to 108d, and the movable electrode 104 is fixed to the bus conductor 66. The electrode 110 is in contact with or the movable electrode 104 is separated from the fixed electrode 110. In this case, the flexible conductors 96 and 98 are curved in accordance with the reciprocating motion of the ground terminal 88. Moreover, the operation rod (only part of which is shown) for operating the grounding switch 56 is comprised substantially the same as the operation rod 32, and the fixed electrode by which the movable electrode 104 was joined to the bus bar conductor 70 was carried out. It is made to contact 110.

The support members 80, 82, 84, and 86 are provided with support bases 112 and 114 made of copper, and insulating rods 116 made of ceramic formed in a cylindrical shape, and both end sides of the insulating rods 116 are formed. The support bases 112 and 114 are joined to each other. And the support base 112 of the support member 80 is joined to the bus conductor 66, the support base 112 of the support members 82, 84, 86 is joined to the bus conductor 70, and each support member The support base 114 of (80, 82, 84, 86) is joined to the lower board | plate material 14, respectively.

In addition, the cable head 48 of # 1 is joined to one end side of the bus conductor 66 via a substantially disk-shaped support base 118, and an arc-shaped shape is connected to the cable head 48 side of the support base 118. The groove 118a is formed in a plurality of concentric circles. The cable head 48 of # 1 comprises a load side rod 120 made of copper formed in a cylindrical shape, and an insulating bushing 122 made of ceramic formed in a substantially cylindrical shape. A screw portion 124 is formed at the axial end of the load side rod 120. The cable constituting the power distribution system is fastened to the screw portion 124, and the insulating portion of the cable is attached to the outer circumferential side of the insulating bushing 122. The axial ends of the load side rod 120 and the insulating bushing 122 are joined to the support base 118, respectively, and the stepped portion 126 is formed in the insulating bushing 122, and the stepped portion 126 is provided. A small diameter step portion 128 is formed. As for the load side rod 120 and the insulating bushing 122, the junction part side of the support base 118 is accommodated in the vacuum container 10, and one part protrudes out of the vacuum container 10. As shown in FIG. And the support ring 130 which contacts the step part 126 and the lower board 14 is arrange | positioned at the outer peripheral side of the step part 128, and the bottom side of the step part 126 is supported by the support ring 130. It is. Further, on the outer circumferential side of the support ring 130 and the stepped portion 126, a shield 132 made of stainless steel formed in a cylindrical shape is disposed.

The connecting rod 134 and the support ring 136 made of copper are joined to the other end side of the bus conductor 66, and the connecting rod 138 is joined to the connecting rod 136. The other end side of the connecting rod 138 is joined to the bus bar conductor 68.

The support members 74, 76, 78 joined to the bus conductors 68 have a cylindrical support rod 140, a copper support base 142, a ceramic insulated rod 144, and a copper support base. 146, the support bases 142 and 146 are joined to both ends of the axial direction of the insulating rod 144, and the support rod 140 is joined to the support base 142, and the support rod The axial end of 140 is joined to the upper plate 12. In addition, the support base 146 is joined to the bus bar conductor 68. That is, the support members 74, 76, and 78 are connected so that the bus bar conductor 68 may be connected to the upper plate 12 with the insulating rod 144 therebetween.

The operating rods 34, 36, and 40 for opening and closing the disconnectors 58, 60 and the breaker 62 are made of cylindrical movable rods 148, bellows 150, support base 152, and ceramics, respectively. And an insulating rod 154, a copper support base 156, and a connecting rod 158 made of stainless steel formed in a substantially cylindrical shape. A screw portion 160 is formed at the axial end of the movable rod 148, and the manipulator is fastened to the screw portion 160. Moreover, the support base 152 made of copper formed in substantially disk shape is joined to the other axial end side of the movable rod 148, and the bellows 150 is connected to the outer peripheral side of the support base 152. As shown in FIG. The axial end of the bellows 150 is fixed to the upper plate 12, and the movable rod 148 and the support base 152 are supported by the bellows 150 so as to reciprocate (up and down). An insulating rod 154 made of ceramic is bonded to the supporting base 152, and a supporting base 152 made of copper is bonded to one end in the axial direction of the insulating rod 154. The connecting rod 158 is a rod insertion hole 160 formed in the bus conductor 68 or a rod insertion hole 162 formed in the bus conductor 72, disconnectors 58 and 60, and a flexible conductor of the breaker 62 ( It is inserted into the rod insertion hole 166 formed in the 164 so as to reciprocate (up and down movement), respectively, and one end in the axial direction is connected to the fixed electrode rods 168 and 170 of the disconnector 58 and 60 and the breaker 62. have.

The disconnectors 58, 60 are flexible conductors 164, an arc diffusion prevention shield 172 of stainless steel formed in a cylindrical shape, and an annular shield 174 formed of a substantially plate shape using stainless steel, and a movable electrode rod made of copper. 168, copper movable electrode 176, copper fixed electrode 178, copper fixed electrode rod 180, stainless steel electrode shield 182 formed in a substantially cylindrical shape, electrode shield 182 And insulating shields 184 and 186 made of ceramic formed in a cylindrical shape so as to cover the periphery thereof, and a shield 188 made of stainless steel formed in a substantially cylindrical shape, and the shield 188 of the disconnecting device 58 has a fixed electrode rod. And the shield 188 of the disconnecting device 60 are joined to the bus conductor 70 together with the fixed electrode rod 180.

The upper side of the shield 172 is joined to the bus bar conductor 68, and the bottom side thereof is fitted to the inner circumferential side of the insulating shield 184. One end of the flexible conductor 164 is joined to the bus bar conductor 68, and the other end of the flexible conductor 164 is joined to the movable electrode rod 168. The shield 174 is disposed between the electrode shield 182 and the flexible conductor 164 and is configured to prevent scattering of metal vapor generated from the movable electrode 176 and the fixed electrode 178.

The movable electrode 176 is held in a state in which it is joined to the axial end of the movable electrode rod 168, and the fixed electrode 178 is bonded to and held in an axial end of the fixed electrode rod 180. And around the movable electrode 176 and the fixed electrode 178, the electrode shield 182 which prevents the scattering of the metal vapor | steam which arises from each electrode is arrange | positioned. A flange 192 is formed on the outer circumference of the axial center portion of the electrode shield 182, and the insulating shield 184 and the insulating shield 186 are disposed up and down around the electrode shield 182 with the flange 192 therebetween. Are divided into. The insulating shields 184 and 186 are divided into two parts on the movable electrode side and the fixed electrode side along the axial direction based on the movable electrode 176 and the fixed electrode 178. The insulating shields 184 and 186 are disposed together with the shields 172 and 188 to cover the outer circumferential side regions of the electrodes 176 and 178, and metal vapor is scattered from the electrodes 176 and 178, and a part thereof. Even when is scattered from the gap between the electrode shields 182, the scattering of the metal vapor is prevented. In addition, the insulating shields 184 and 186 pass through the insulating shields 184 and 186 even when the movable electrode 176 and the fixed electrode 178 are separated from each other and a potential difference is generated between the electrodes, for example, when the opening operation is performed. It is comprised so that an electric current may be prevented and an operation | movement of an open path is performed reliably.

On the other hand, the breaker 62 includes a movable electrode 194 and a fixed electrode 196 disposed opposite the movable electrode 194, and the movable electrode 194 is in the axial direction of the movable electrode rod 170. It is bonded and held at one end, and the fixed electrode 196 is bonded and held at one end in the axial direction of the fixed electrode rod 198. A stainless steel shield 200 is bonded to the movable electrode rod 170 adjacent to the movable electrode 194, and a stainless steel shield 202 is bonded to the fixed electrode rod 198 adjacent to the fixed electrode 198. It is. Spiral grooves are formed on the surfaces of the movable electrode 194 and the fixed electrode 196 to confine the arc. The other structure of the breaker 62 is the same as that of the disconnector 58. That is, the shield 172 is joined to the bus conductor 72, and the shield 188 is joined to the connection base 190 together with the fixed electrode rod 198. In addition, the cable head 50 of # 2 and the cable head 52 of # 3 are comprised using the same thing as the cable head 48 of # 1.

In the circuit breaker 62, insulating shields 184 and 186 are disposed on the outer circumferential side of the electrode shield 182, and the movable electrode 194 and the fixed electrode 198 are separated from each other at the time of tripping, and are separated between the electrodes. Even if a potential difference occurs, the current can be prevented from flowing through the insulating shields 184 and 186, so that the trip operation can be reliably performed.

On the other hand, the backing support rod 38 is provided in order to connect the disconnector 60 and the breaker 62 in series, and the support rod 38 supports the movable rod 204, the bellows 206, and the copper. A base 208, an insulating rod 210 made of ceramic, a support base 212 made of copper, and a connecting rod 214 made of stainless steel are provided. The support base 208 is joined to one end of the movable rod 204 in the axial direction, and the bellows 206 is connected to the outer circumferential side of the support base 208. An axial end of the bellows 206 is fixed to the upper plate 12. An axial end of the insulating rod 210 is joined to the support base 208, and a support base 212 is joined to the other axial end of the insulating rod 210. The connecting rod 214 is joined to the support base 212. The connecting rod 214 is inserted in the rod insertion hole 162 formed in the bus conductor 72 and the rod insertion hole 166 formed in the flexible conductor 164 so as to reciprocate (up and down), and the tip end side thereof. It is connected to the connecting rod 216 with the movement. An axial one end of the connecting rod 216 is joined to the support base 218, and the support base 218 is joined to the bus bar conductor 70.

That is, the bus bar conductor 70 and the bus bar conductor 72 are connected via the support base 218, the connection rod 216, and the flexible conductor 164. In this case, the support base 218 and the connecting rod 216 serve as the covering conductor for the covering, the flexible conductor 164 serves as the covering flexible conductor, and the supporting rod 38 supports the supporting rod 216. And the support base 218 as a backing support rod for urging the bus bar conductor 70 side.

Each flexible conductor 164 (96, 98) is provided with a pair of fixing parts 164a and 164b and a pair of curved parts 164c and 164d, and is loaded in the fixing part 164a. The insertion hole 166 is formed as a through hole. And the fixed part 164a is joined to bus conductors 68 and 72, and the fixed part 164b is joined to the movable electrode rods 168 and 170. As shown in FIG. Each of the curved portions 164c and 164d is formed by overlapping plate materials using different metals, for example, steel and stainless steel, and each of the curved portions 164c and 164d has both sides based on the axis of the movable electrode rods 168 and 170. And one end side is joined to the fixed part 164a, and the other end side is joined to the fixed part 164b. In this case, the current from the bus conductors 68 and 72 branches and flows through the fixing portion 164a to the curved portion 164c and the curved portion 164d, and the branched currents flow through the movable portion 164b, respectively. Flow through the rods 168 and 170. At this time, the directions of the currents at both end portions of the curved portions 164c and the curved portions 164d are opposite to each other. For this reason, the electromagnetic force generated by the current flowing through each of the curved portions 164c and 164d acts in a direction in which both end portions of the curved portions 164c and 164d are separated from each other. As a result, the bonding between the fixing portion 164a and the bus conductors 68 and 72 is secured by this electromagnetic force, and the bonding between the fixing portion 164b and the movable electrode rods 168 and 170 is further strengthened. The contact force between 176 and the fixed electrode 178 can be strengthened, and the contact force between the movable electrode 194 and the fixed electrode 196 can be strengthened.

In addition, a conductive film is formed on the inner circumferential side of the insulating bushing 122 of the cable heads 48, 50, 52 in the present embodiment, that is, the opposing surface of the load side rod 120, and the inner circumferential side of the insulating bushing 122. The potential is the same as that of the load side rod 120. For this reason, the insulation gap between the load side rod 120 and the insulating bushing 122 can be minimized. That is, since the inner circumferential side and the load side rod 120 of the insulating bushing 122 are maintained at the same potential, the difference in thermal expansion between the ceramic constituting the insulating bushing 122 and the metal constituting the load side rod 120 is specifically ,. The gap is completed by providing a gap only by the difference in thermal expansion generated when heated to 800 ° C. by soldering at the time of attachment, so that the space occupied by the cable heads 48, 50, and 52 can be reduced, and workability can be improved. have.

In the cable heads 48, 50, and 52 according to the present embodiment, a part of the cable heads 48, 50, and 52 are inserted into the vacuum vessel 10, and the stepped portion 126 is formed by the ring 130. Since the impact force generated when the movable electrodes 176 and 194 are pushed toward the fixed electrodes 178 and 196 at the time of inputting acts on the cable heads 48, 50 and 52, the impact force is applied to the ring ( 130 can be absorbed by the lower plate member 14, and the cable heads 48, 50, and 52 can be prevented from being deteriorated by the impact force.

In addition, an electronic manipulator (an electronic manipulator connected to the operating rods 34 and 40) and a switch (disconnector 58, a breaker 62) and a cable head 50 and 52 (load side rod 120 and an insulating bushing 122). ) Is arranged in a straight line along the axial direction (vertical direction), so that the space between the switchgears can be kept to a minimum, contributing to miniaturization of the switch gear.

The vacuum switch gear by the said structure can be used as a switch which has a function of the rated voltage of 24 mA, the rated current of 630A / 1250A, and the rated short-time current of 25 mA / 3s (4s), for example.

Next, the manufacturing method of the vacuum switch gear which concerns on this invention is demonstrated based on drawing. When manufacturing a vacuum switch gear, each component which comprises a vacuum switch gear is divided into parts. For example, the vacuum container 10 is divided into an upper plate 12, a lower plate 14, and a side plate 16, and the support rods 140 and a support base 14 for the support members 74 to 78. 142, the insulating rod 144, and the support base 146, and the disconnecting unit 58 includes the fixing portions 164a and 164b, the curved portions 164c and 164d, the shields 172 and 174, and the movable electrode rod ( 168, the movable electrode 176, the fixed electrode 178, the fixed electrode rod 180, the electrode shield 182, the insulating shields 184 and 186, the shield 188, and the connection base 190.

Next, the parts constituting the upper parts group, for example, the parts group constituting the supporting members 74 to 78 and the operating rods 34, 36 and 40, wherein the divided parts are arranged on the upper plate 12 side. It divides into groups, etc., and comprises the component group which comprises the lower component group arrange | positioned at the lower board 14 side, for example, the support member 80, 82, 84, 86, and the cable head 48, 50, 52. Divide into parts groups, etc. In addition, the component group is divided into insulating components, for example, insulating rods 114, 116, and 154, insulating shields 184 and 186, insulating bushings 122, and other components.

Thereafter, for example, silver and copper (0.1 mm thick) are inserted between the parts other than the parts having insulating properties, and these parts groups are heated at 960 ° C. for about 10 minutes in a vacuum atmosphere. After the natural cooling, the parts are soldered to each other, the upper part group is fixed to the upper plate member 12, and the lower part group is fixed to the lower plate member 14.

Next, the process for soldering a component having insulation to the upper part group fixed to the upper plate member 12 and the lower part group fixed to the lower plate member 14 is transferred. That is, as shown in FIGS. 5A and 5B, the insulating rods 144 and 154 are fixed to the upper plate member 12, and the lower plate member 14 is fixed to the upper plate member 12. As shown in Figs. 6A and 6B, the insulating rod 116, the insulating shields 184 and 186, and the insulating bushing 122 are fixed as these components having insulating properties. For the parts having insulation, a soldering material is inserted between the parts having insulation and the parts to be soldered, for example, the flange 192 and the support base 118, in a vacuum atmosphere. At about 835 ° C. for about 10 minutes, and thereafter, by naturally cooling, the group of parts having insulation and other upper parts are fixed to the upper plate 12, and the group of parts having insulation to the lower plate 14 and the Secure the outer subassembly. At this time, since the support base 118 and the insulating bushing 122 made of copper have different thermal expansion coefficients, the supporting base (118) is accompanied by a change in temperature during the soldering of the support base 118 and the insulating bushing 122. Residual stress acts between the 118 and the insulating bushing 122, and any one deforms in that state. However, since a plurality of arc-shaped grooves 118a are formed in the support base 118, even if the residual stress acts between the support base 118 and the insulating bushing 122 with the change of temperature, the residual stress is applied. It can absorb in each groove 118a which is lower in rigidity than the insulation bushing 122, and the support base 118 and the insulation bushing 122 can be reliably soldered.

Next, as shown in Fig. 7, the upper plate member 12 on which the upper part group is fixed and the lower plate member 14 on which the lower part group is fixed are disposed to face each other in an inert gas, and the upper plate member 12 ) And the side plate 16 is disposed adjacent to the lower plate 14 and the periphery of the upper plate 12, the lower plate 14 and the side plate 16 by TIG welding to fix the vacuum vessel 10 Seal).

Next, as shown in FIG. 8, the vacuum pump 220 is connected to the exhaust pipe 18, and the inside of the vacuum container 10 is evacuated by the vacuum pump 220. As shown in FIG. In this case, the inside of the vacuum container 10 is heated to 430 degreeC for about 12 hours, and the inside of the vacuum container 10 is evacuated. After the vacuum chamber 10 has been evacuated, a vacuum gauge is connected to the vacuum measuring terminal 20, and the vacuum container 10 is measured whether or not the inside of the vacuum container 10 is maintained at the prescribed vacuum degree.

In this embodiment, the component group fixed to the vacuum container 10 is divided into the upper component group and the lower component group, the upper component group is fixed to the upper plate member 12, and the lower component group is attached to the lower plate member 14. Since it is being fixed, assembly work can be performed easily.

In addition, when soldering each component group, the insulating component and the other components are divided into two processes, and the soldering of each process is performed at different temperatures, so that the insulating component and the other components are assured. Can be soldered.

In addition, in this embodiment, when the operating rods 34, 36, and 40 are operated, only the flexible conductor 164 bends with the reciprocation of the connecting rod 158, and the bus conductors 68 and 72 are carried out. Since the state is fixed, even if the operating rods 34, 36, and 40 are operated, the bus conductors 68 and 72 can be prevented from being deformed.

In this embodiment, although the insulating shields 184 and 186 were provided as disconnectors 58 and 60, these can be abbreviate | omitted about disconnectors 58 and 60. As shown in FIG.

In addition, in this embodiment, although the bus conductors 68 and 72 were fixed, the bus conductor 222 was used using the bus conductor 222 comprised by laminating | stacking thin plates, as shown typically in FIG. A curved portion 224 is formed in the middle of the wire, and each of the operation rods 34, 36, and 40 is connected to the bus bar conductor 222, and the operation of the bus conductors 222 is performed according to the operation of the operation rods 34, 36, and 40. The structure which curves the curved part 224 can also be employ | adopted.

In addition, in the said embodiment, although having the circuit switch 54 and 56 for grounds, the disconnectors 58, 60, and the circuit breaker 62 as a vacuum switch gear of 3 circuits was demonstrated, it was described by a circuit structure etc. The combination or number of the 54, 56, disconnectors 58, 60, and the breaker 62 can be arbitrarily set.

For example, when the vacuum switch gear is composed of three disconnectors 58 and three grounding switch 54, the configuration as shown in Fig. 10 can be adopted.

In addition, when the vacuum switch gear is composed of two disconnectors 58 and two ground switch 54, the configuration as shown in Fig. 11 can be adopted.

When the vacuum switch gear is composed of one circuit breaker 62 and one ground switch 54, the configuration as shown in Fig. 12 can be adopted.

As the circuit system, various circuit methods such as two circuits, three circuits, four circuits, five circuits, or a combination of three circuits and four circuits can be adopted.

In addition, in order to apply a plurality of vacuum switch gears in an open (open) loop method in consideration of connecting a plurality of vacuum switch gears in series, a disconnector is arranged on both sides of the circuit breaker, or a plurality of vacuum switch gears are provided. In order to apply to the closed (closed) loop system, all other than the grounding switch may be configured as a breaker.

In this embodiment, since the various switchgear arrange | positioned in the vacuum container 10 is vacuum-insulated, maintenance of a main circuit can be carried out at the same time, and an unmanned number can be aimed at by employing an electronic manipulator as a manipulator. In addition, by separating the inside of the vacuum container 10 for each phase, a short circuit accident can be prevented. In addition, reliability can be improved by always monitoring the degree of vacuum in the vacuum chamber 10.

In the present embodiment, the vacuum container 10 has been described as having only the elements for everyday use as the containers for each phase separation, but as shown in Figs. 13A and 13B, three-phase U The disconnectors 58U, ..., 60U, ... for the phases, V phases, and W phases, the breakers 62U, 62V, 62W for the three phases, and the like can be stored in the vacuum container 10. In this case, the electronic manipulator (electronic manipulator) is made to correspond to the operation rods 34U, ..., 36U, ..., 40U, 40V, 40W for the switchgear on the outer circumferential surface of the vacuum vessel 10, that is, the surface of the upper plate 12. (230U,…, 232U, 234U, 234V, 234W) are fixed, and each operation rod (34U,…, 36U,…, 40U, 40V, 40W) and each electronic manipulator (230U,…, 232U, 234U, 234V, 234W) to each other. Each electronic manipulator 230U, ..., 232U, 234U, 234V, 234W is configured to open and close each operation rod 34U, ..., 36U, ..., 40U, 40V, 40W in response to the opening and closing operation signal, respectively. By the open / close operation signal output from the controller (not shown), each switch can be opened and closed automatically.

Furthermore, the electronic manipulators 230U, ..., 232U, 234U, 234V, 234W of each phase, the switchgear (breakers 58U, ..., 60U, ...), breakers 62U, 62V, 62W of each phase, and the cable head of each phase [ Since the load side rods 120U, 120V, 120W, ... and the insulating bushing covering each load side rod are arranged in a straight line along the axial direction (vertical direction), the space between each switch can be kept to a minimum. It becomes possible to contribute to the miniaturization of the gear.

As described above, according to the present invention, when soldering each component group, it is divided into two parts having an insulating property and other parts, and the soldering of each step is performed at different temperatures. Parts other than that can be reliably soldered, respectively, and it becomes possible to contribute to the improvement of reliability.

Claims (5)

A plurality of switches are housed in a vacuum container composed of an upper plate, a lower plate, and a side plate, an operation rod is connected to one end of each switch, and a load side rod is connected to the other end, respectively, and the surroundings of the load side rods. When manufacturing a vacuum switch gear each of which is covered with an insulating bushing, each component of the vacuum switch gear is divided into parts, and each of the divided parts is arranged on the upper plate side and the upper part group and the lower part. Divided into the lower parts group arranged on the plate side, divided each parts group into parts having insulation and other parts, inserting solder material between parts other than parts having insulation, and heating these parts groups to the specified temperature Each part is soldered to each other, and then between an insulating part and the part to be soldered Solder is inserted to heat these component groups to a temperature lower than the specified temperature, and each component is soldered. Then, around the upper plate and the lower plate and the side plate to which the upper component group is fixed. A method for manufacturing a vacuum switch gear, wherein the vacuum container is sealed by fixed attachment by welding in an inert gas. A vacuum container comprising an upper plate, a lower plate, and a side plate, a plurality of switches housed in the vacuum container with the movable electrode held in the movable electrode rod and the fixed electrode held in the fixed electrode rod facing each other; One or more bus bar conductors connected to the movable electrode rod or the fixed electrode rod of the switch, a plurality of operation rods connected to the movable electrode rod of each switch, a part of which is connected to a manipulator outside the vacuum vessel, and each switch A plurality of load side rods connected to fixed electrode rods of the plurality of load side rods, the plurality of load side rods protruding out of the vacuum vessel, and a plurality of insulating bushings disposed in and out of the vacuum vessel to cover the periphery of the load side rods; Is disposed around the movable electrode and the fixed electrode to the movable electrode and the fixed electrode. When manufacturing a vacuum switch gear comprising a cylindrical electrode shield that prevents the scattering of the metal vapor generated from and a cylindrical insulating shield covering the periphery of the electrode shield, each component of the vacuum switch gear While dividing into parts, each divided part is divided into an upper parts group arranged on the upper plate side and a lower parts group arranged on the lower plate side, and between the parts other than the parts having insulation among the parts groups. Insert a solder member and heat it to a specified temperature, and after the solder material melts and cools, soldering each component to each other, fixing the upper part group to the upper plate member and fixing the lower part group to the lower plate member. Next, between the parts having insulation and the parts to be soldered to the parts having insulation, The solder material is inserted and heated to a temperature lower than the specified temperature, and after the solder material is melted and cooled, the components to be soldered between the insulating component and the insulating component are soldered. While the fixed upper plate and the lower part group is fixed to the lower plate to face each other, while the side plate is disposed adjacent to the upper plate and the lower plate, while welding the upper plate and the side plate And vacuuming the inside of the vacuum container by welding the lower plate material and the side plate material, and then sealing the vacuum container. A vacuum container comprising an upper plate, a lower plate, and a side plate, a plurality of switches housed in the vacuum container with the movable electrode held in the movable electrode rod and the fixed electrode held in the fixed electrode rod facing each other; One or more bus bar conductors connected to the movable electrode rod or the fixed electrode rod of the switch, a plurality of operation rods connected to the movable electrode rod of each switch, a part of which is connected to each manipulator outside the vacuum vessel; A plurality of load side rods connected to a fixed electrode rod of the switch, a part of which protrudes out of the vacuum vessel, and a plurality of insulating bushings disposed in and out of the vacuum vessel and covering the periphery of the load side rods; A switch is disposed around the movable electrode and the fixed electrode, so that the movable electrode and the fixed electrode A cylindrical electrode shield for preventing the scattering of metal vapor generated from the metal vapor; and a cylindrical insulating shield covering the periphery of the electrode shield, wherein the bus conductor is fixed to the vacuum container, and the movable electrode of each switchgear. When the rod is manufactured in the vacuum switch gear which is connected to the bus bar conductor via a flexible conductor, each component of the vacuum switch gear is divided into parts and at the same time, the divided parts are arranged on the upper plate side. Divided into an upper part group and a lower part group disposed on the lower plate side, inserting a solder material between parts other than the insulating part among the parts group, heating it to a specified temperature, and melting and cooling the solder material Each part is soldered to each other, and the upper part group is fixed to the upper plate, and the lower part An article group is fixed to the lower plate member, and then a solder member is inserted between the component having the insulating property and the component to be soldered to the component having the insulating property and heated to a temperature lower than the specified temperature, and the solder material melts. After cooling, the soldered parts and the parts to be soldered to the insulating parts are soldered. Then, the upper plate member to which the upper component group is fixed and the lower plate member to which the lower component group is fixed are opposed to each other. At the same time, the side plate is disposed adjacent to the upper plate and the lower plate, and the upper plate and the side plate are welded, and the lower plate and the side plate are welded to evacuate the inside of the vacuum container. And then sealing the vacuum container. A vacuum container comprising an upper plate, a lower plate, and a side plate, a plurality of switches housed in the vacuum container with the movable electrode held in the movable electrode rod and the fixed electrode held in the fixed electrode rod facing each other; One or more bus bar conductors connected to the movable electrode rod or the fixed electrode rod of the switch, a plurality of operation rods connected to the movable electrode rod of each switch, a part of which is connected to a manipulator outside the vacuum vessel, and each switch A plurality of load side rods connected to fixed electrode rods of the plurality of load side rods, the plurality of load side rods protruding out of the vacuum vessel, and a plurality of insulating bushings disposed in and out of the vacuum vessel to cover the periphery of the load side rods. A bushing is formed by retaining a portion of the bushing on the wall of the vacuum container in the vacuum container. When manufacturing the vacuum switch gear, the respective components of the vacuum switch gear are divided into parts, and each divided part is divided into an upper part group disposed on the upper plate side and a lower part disposed on the lower plate side. The upper part group is divided into groups, the solder member is inserted between components other than the insulating component among the component groups, heated to a specified temperature, the solder material is melted and cooled, and the respective components are soldered together. The fixed temperature is fixed to the upper plate, and the lower group of parts is fixed to the lower plate, and then a solder material is inserted between the component having the insulating property and the component to be soldered to the insulating component, respectively, to thereby specify the specified temperature. Heating to a lower temperature, and after the solder material is melted and cooled, the component having the insulating property and the insulating property The parts to be soldered are soldered to each other, and then, the upper plate member to which the upper component group is fixed and the lower plate member to which the lower component group is fixed are disposed to face each other, and adjacent to the upper plate and the lower plate. Disposing the side plate, welding the upper plate and the side plate, and welding the lower plate and the side plate to evacuate the inside of the vacuum container, and then seal the vacuum container. Method of manufacturing a vacuum switch gear. The vacuum switch gear according to any one of claims 1, 2, 3, and 4, wherein a conductive film is formed on an opposing surface of each of the insulating bushings with each of the load side rods. Way.