CN105609335B - A kind of gas-insulated ring network cabinet and rotary three-station and conductive component - Google Patents

Abstract

The invention relates to a gas-insulated ring network cabinet, a rotary three-position switch and a conductive component. The conductive component includes a conductive contact seat and an annular conductive contact finger arranged on the conductive contact seat. The conductive contact seat is provided with a The main shaft pierced by the insulated main shaft and can rotate freely, the axis of the main shaft perforation extends along the left and right directions, and the ring-shaped conductive contact finger is arranged on the periphery of the main shaft perforation for electrical connection with the sliding contact of the moving contact when the insulating main shaft rotates. , the annular conductive contact finger is always in contact with the moving contact and is fixedly connected to the conductive contact seat, the conductive contact seat is electrically connected to the main circuit, and the moving contact and the main circuit in the prior art are connected through a thin soft connection or Compared with the contact connection, its flow capacity and rotational movement stroke are increased, and the electrical connection between the annular conductive contact finger and the movable contact is located inside the conductive contact seat, which ensures the electrical connection between the movable contact and the conductive contact seat reliability.

Description

A gas-insulated ring network cabinet, a rotary three-position switch, and a conductive component

technical field

The invention relates to the technical field of switchgear, in particular to a gas-insulated ring network cabinet, a rotary three-position switch and a conductive component.

Background technique

Gas-insulated ring network cabinets are widely used in medium and high-voltage power transmission and distribution networks for power distribution and line protection. The three-position switch is the main component of the gas-insulated ring network cabinet and is installed in the gas-insulated ring network cabinet for line connection, line isolation and line grounding. The three-position switch is provided with three operating states, usually the closing state, the opening state and the grounding state. According to the structure, the three-position switch can usually be divided into a direct-acting three-position switch and a rotary three-position switch.

The rotary three-position switch generally adopts a knife gate structure. The knife gate is the moving contact, which is driven by the insulating spindle. The moving contact is installed on the insulating spindle and connected to one end of the main circuit. On the rotation circle of the end of the moving contact and placed at a suitable position on both sides of the moving contact, the closing contact is connected to the other end of the main circuit, the grounding contact is connected to the grounding busbar, and the rotary three-position switch passes through the external The mechanism drives the insulation main shaft to rotate to realize the connection between the moving contact and the closing contact seat or the moving contact and the grounding contact seat. The rotary three-position switch is generally arranged in the way of front, middle and back because of the rotating action of the moving contact. The ring network cabinet can be designed with a smaller cabinet width in the left and right directions. The rotary three-position switch is installed on the insulated main shaft that needs to be rotated when the moving contact is in motion, and the moving contact must also be electrically connected with the main circuit, which makes the structural design more difficult. At present, the moving contact and the main circuit generally use a thin soft connection or contact for sliding connection, but its flow capacity is limited, and the movement stroke is small, resulting in limited opening distance, which cannot be used in ring main units with higher voltage and current levels. Continuously used in the middle, because of the changeable shape of the soft connection, the swing is large during the action, the position after the action is uncertain, and it is easy to deform and break due to the influence of electrodynamic force after receiving a large short-circuit current, resulting in insulation failure, etc., which can no longer meet the use requirements.

Contents of the invention

The purpose of the present invention is to provide a conductive assembly that solves the problem of small flow due to the sliding connection between the moving contact and the main circuit in the form of a thin soft connection or a contact point in the prior art, and the purpose of the present invention is also to Disconnectors and ring main units using this conductive component are available.

The conductive component of the present invention adopts the following technical scheme: the conductive component includes a conductive contact seat and a ring-shaped conductive contact finger arranged on the conductive contact seat, and the conductive contact seat is provided with a freely rotatable shaft for wearing the insulating main shaft. The main shaft is perforated, the axis of the main shaft perforation extends along the left and right directions, and the annular conductive contact finger is arranged on the periphery of the main shaft perforation for electrical connection with the sliding contact of the moving contact when the insulating main shaft rotates.

The conductive contact seat is a split structure, including a left conductive contact seat plate and a right conductive contact seat plate arranged at intervals on the left and right, a gap for accommodating the moving contact is formed between the left and right conductive contact seat plates, and the ring-shaped conductive contact finger includes The annular left conductive contact finger arranged on the left conductive contact seat plate and the annular right conductive contact finger arranged on the right conductive contact seat plate.

The opposite sides of the left and right conductive contact seat plates are provided with ring-shaped conductive contact finger grooves, and the ring-shaped conductive contact fingers are installed in corresponding conductive finger grooves.

A spacer is provided between the left and right conductive contact plates to limit the distance between the left and right conductive contact plates.

The conductive contact seat has an installation plane arranged at its lower part for fixed electrical connection with the lower outgoing line row.

The isolating switch of the present invention adopts the following technical scheme: the isolating switch includes a conductive component, a movable contact, and an insulating main shaft that is installed for the movable contact and is connected to the movable contact by an axis extending along the left and right directions, and the conductive component includes a conductive The contact seat and the ring-shaped conductive contact finger arranged on the conductive contact seat. The conductive contact seat is provided with a main shaft perforation for the insulation main shaft to wear and can rotate freely. The axis of the main shaft perforation extends along the left and right directions. The annular conductive contact The finger is arranged on the periphery of the main shaft perforation for electrical connection with the sliding contact of the moving contact when the moving contact rotates with the insulating main shaft.

The mating surface is a plane.

The conductive contact seat is a split structure, including a left conductive contact seat plate and a right conductive contact seat plate arranged at intervals on the left and right, a gap for accommodating the moving contact is formed between the left and right conductive contact seat plates, and the ring-shaped conductive contact finger includes The annular left conductive contact finger arranged on the left conductive contact seat plate and the annular right conductive contact finger arranged on the right conductive contact seat plate.

The isolating switch also includes a isolating switch bracket, and the isolating switch bracket is provided with left and right mounting plates for the installation of the insulating main shaft and a moving contact arranged between the left and right mounting plates for installing the moving contacts of the isolating switch Beams and static contact beams for installation of static contacts of isolating switches.

The ring network cabinet of the present invention adopts the following technical scheme: the ring network cabinet includes a cabinet body and an isolating switch arranged inside the cabinet body. The axis of connection extends along the left and right directions of the insulating main shaft. The conductive component includes a conductive contact seat and an annular conductive contact finger arranged on the conductive contact seat. The rotating main shaft is perforated, and the axis of the main shaft perforation extends along the left and right directions. The annular conductive contact finger is arranged on the periphery of the main shaft perforation, and is used to electrically connect the movable contact with the sliding contact of the movable contact when the insulated main shaft rotates. The contact fingers contact the mating surface of the conductive mating.

The beneficial effects of the present invention are: the conductive contact seat is provided with an annular conductive contact finger electrically connected with the sliding contact of the movable contact when the movable contact rotates with the insulating main shaft on the periphery of the main shaft perforation, and the annular conductive contact finger is always in contact with the movable contact And the moving contact is electrically connected to the conductive contact seat, and the conductive contact seat is electrically connected to the main circuit. Compared with the connection between the moving contact and the main circuit through a thinner soft connection or contact in the prior art, its communication capacity is increased. flow capacity and rotary motion stroke, and the electrical connection between the annular conductive contact finger and the movable contact is located inside the conductive contact seat, which ensures the reliability of the electrical connection between the movable contact and the conductive contact seat. The internal ring-shaped conductive contacts and moving contacts realize electric field shielding to ensure that there is no risk of insulation degradation during switching operations.

Description of drawings

Fig. 1 is the structural representation of an embodiment of ring network cabinet of the present invention;

Fig. 2 is the bottom view of Fig. 1;

Fig. 3 is a schematic diagram of the action and positional relationship of the closing state, opening state and grounding state of the three-position switch;

Fig. 4 is a cross-sectional view at A-A of the three-position switch in Fig. 1;

Fig. 5 is a sectional view of the three-position switch in Fig. 1 at B-B;

Fig. 6 is a schematic structural diagram of a moving contact;

FIG. 7 is a schematic structural diagram of the conductive contact seat.

Detailed ways

The ring network cabinet, as shown in Figures 1 and 2, is a gas-insulated ring network cabinet including a closed cabinet body 17, an isolating switch arranged inside the cabinet body 17, and an isolating switch bracket 1 for the isolating switch to be installed. The isolating switch is three The station isolating switch includes three isolating switch single-phase, and each isolating switch single-phase includes a grounding contact 4 arranged on the isolating switch bracket 1, a closing contact 7 electrically connected to one end of the main circuit, and the other end of the main circuit The electrically connected conductive components, the movable contact 2 electrically connected with the conductive component and the insulating main shaft 9 running through the single phase of each isolating switch and connected with the movable contact 2 on the left and right. The annular conductive contact finger 14 and the spacer 15 on the seat 3. The isolating switch bracket 1 includes left and right mounting plates 20 for installing the insulating main shaft 9, a moving contact crossbeam 21 for installing the moving contacts 2 of the isolating switch between the left and right mounting plates 20, The static contact beam installed on the static contact of the isolating switch, the moving contact beam 21 is used to fix the lower outlet bar 10 and the conductive contact seat 3, and the static contact beam includes the closing contact beam for installing the closing contact 7 23 and the grounding contact beam 22 for installing the grounding contact 4, the closing contact beam 23 is provided with a closing contact supporting insulator 8, the moving contact beam 21 is fixedly connected with a moving contact supporting insulator 11, and the moving contact supporting insulator 11 is fixed on the moving contact beam 21. The contact support insulator 11 is fixedly connected with the lower outgoing line bar 10, the conductive contact seat 3 is fixedly installed on the lower outgoing line bar 10, the closing contact seat 7 is installed on the closing contact support insulator 8 and is electrically connected through the upper outgoing line bar 6 At one end of the main circuit, the lower end of the conductive contact seat 3 is fixedly connected to the lower outgoing line bar 10, and the lower outgoing line bar 10 is fixedly connected to the moving contact support insulator 11, and the conductive contact seat 3 is electrically connected to the other side of the main circuit through the lower outgoing line bar 10. At one end, the grounding contact seat 4 and the grounding copper bar 5 are connected to the grounding contact seat crossbeam 22 by screws, and the left and right mounting plates 20 of the isolating switch bracket 1 are provided with a left bushing 18 and a right bushing 19 correspondingly. 9 is assembled on the isolating switch bracket 1 through the rotation of the left and right shaft sleeves. As shown in Figure 6, the movable contact 2 is provided with a hexagonal through hole 2-1 extending in the left and right direction, and the insulating main shaft 9 is an outer hexagonal structure matching the hexagonal through hole 2-1, and the insulating main shaft 9 can drive the moving The contact 2 rotates synchronously, the movable contact 2 can swing back and forth around the insulating main shaft 9, and the ground contact 4 and the closing contact 7 are located on the movement stroke of the end of the movable contact. The isolating switch support 1 is a frame structure, which increases the strength of the three-position switch.

Conductive contact seat 3, as shown in Fig. 4, Fig. 5 and Fig. 6, comprises the left conductive contact seat plate 3-5 and the right conductive contact seat plate 3-6 that left and right splits are arranged at intervals, during use, left and right conductive contact seat plate The seat plate sandwiches the moving contact 2 between the two, and the left and right conductive contact seats are provided with a main shaft perforation 3-2 for the insulating main shaft 9 to pass through, that is, the left main shaft perforation and the right main shaft perforation, and the main shaft perforation 3-2. The diameter of 2 is greater than the maximum outer diameter of the insulating main shaft 9, the left conductive contact finger groove 3-1 is provided on the right side of the left conductive contact seat plate 3-5, and the left conductive contact finger groove 3-1 is provided on the left side surface of the right conductive contact seat plate 3-6. There is a right conductive contact finger slot, and the left and right conductive contact finger slots are respectively provided with annular left conductive contact fingers and annular right conductive contact fingers. The movable contact 2 is electrically connected with the conductive contact seat 3 through the annular conductive contact finger 14, and the movable contact The head 2 has a mating surface 2-2 which contacts and electrically conducts with the annular conductive contact finger 14, and the mating surface 2-2 is a plane. Spacers 15 are arranged on the front and rear sides of the movable contact 2 between the left and right conductive contact plates, and installation holes 3-4 are arranged on the front and rear sides of the movable contact 2 on the left and right conductive contact plates. 15 The spacer 15 is rotated and assembled on the conductive contact seat 3 through the cooperation of the pin shaft and the installation hole 3-4. The spacer 15 is used to limit the position between the left and right conductive contact seat plates and to adjust the ring-shaped conductive contact fingers. The compression amount of 14 is controlled, and the setting of the spacer 15 needs to meet the requirements of the rotation stroke of the movable contact 2, and the closing and grounding positions can be limited. The distance between the left and right conductive contact seat plates forms a gap for accommodating the movable contact 2 . The bottom of the left and right conductive contact seat plates are all provided with a mounting plane 3-3 for fixed electrical connection with the lower outlet row 10, and the mounting plane 3-3 is provided with threaded holes, and the left and right conductive contact seat plates are connected with the lower The outlet bar 10 is fixedly connected by bolts. The power input end of the insulating main shaft 9 is led to the outside of the cabinet body 17 through the transition joint 12 and the sealing joint 13. The power input end of the insulating main shaft 9 is provided with a sealing joint 13, and the sealing joint 13 is sealed with the cabinet body 17 through the sealing ring 16. Cooperate to realize the sealing effect of the gas insulated ring main unit. The included angle between the connection direction of the two mounting holes 3-4 provided on the conductive contact 3 and the mounting surface 3-3 is D, and the included angle D is generally an acute angle.

In the present invention, the left and right conductive contact seat plates are disc-shaped structures, and the main shaft perforation is a circular hole with a diameter larger than the maximum outer diameter of the insulating main shaft 9, and the insulating main shaft 9 can pass through the main shaft perforation and can rotate freely in the hole. Since the two annular conductive contact fingers 14 are installed inside the conductive contact seat 3 , the electric field can be shielded by the conductive contact seat 3 . The outer circular edge of the conductive contact 3 can be provided with certain rounded corners, which is used to control the electric field strength between phases, meet the insulation requirements between phases, and realize the integrated design of conduction and high-voltage shielding.

The working process of the present invention is as follows: as shown in Figure 1, the moving contact 2 is located between the ground contact seat 4 and the closing contact seat 7, at this time the three-position switch is in the opening state; as shown in Figure 3, from the middle position Turn the insulating main shaft clockwise, and the insulating main shaft will drive the moving contact to rotate clockwise. When the moving contact is in electrical contact with the closing contact seat, the three-position switch is in the closing state; turn the insulating main shaft counterclockwise from the middle position, and the insulating The main shaft drives the moving contact to move counterclockwise. When the moving contact is in electrical contact with the grounding contact seat, the three-position switch is in the grounding state at this time.

In other embodiments of the present invention, the conductive contact seat can be of an integrated structure. At this time, the conductive contact seat is provided with a main shaft through hole extending left and right through the axis of the conductive contact seat and extending in the left and right direction, and a gap for accommodating the moving contact. And there is a running space for the movable contact to swing back and forth between the grounding state, the opening state and the closing state along the insulating main shaft to switch the three states; the ring-shaped conductive contact finger grooves on the left and right conductive contact seats can be set on the movable On both sides of the contact plane, this kind of rotating electrical connection structure is realized; the conductive contact seat can also only retain the left conductive contact seat plate or the right conductive contact seat plate; there can be only one conductive contact finger slot, and the corresponding ring-shaped conductive contact finger It is also one; the three-position switch may also include one single-phase three-position switch or two single-phase three-position switches; the conductive contact seat may also have a polygonal structure.

The embodiment of the isolating switch of the present invention is the same as the embodiment of the isolating switch in each embodiment of the above-mentioned ring main unit, and will not be repeated here.

The embodiment of the conductive component of the present invention is the same as the embodiment of the conductive component in each embodiment of the above-mentioned ring main unit, and will not be repeated here.

Claims (6)

1. The conductive component is characterized in that: it includes a conductive contact seat and an annular conductive contact finger arranged on the conductive contact seat, and the conductive contact seat is provided with a main shaft perforation for the insulating main shaft to wear and can rotate freely, the main shaft The axis of the perforation extends along the left and right directions, and the annular conductive contact fingers are arranged on the periphery of the main shaft perforation for electrical connection with the sliding contact when the movable contact rotates with the insulating main shaft. The conductive contact seat is a split structure including left and right intervals. The left conductive contact seat plate and the right conductive contact seat plate form a gap for accommodating the movable contact between the left and right conductive contact seat plates. Finger and the ring-shaped right conductive contact finger arranged on the right conductive contact seat plate. A spacer is arranged between the left and right conductive contact seat plates to limit the distance between the left and right conductive contact seat plates. 1. Mounting holes are provided on the front and rear sides of the moving contact on the right conductive contact seat plate, and the spacer is rotated and assembled on the conductive contact seat through the cooperation of the pin shaft and the mounting hole; the left and right conductive contact seat plates The opposite sides are provided with ring-shaped conductive contact finger slots, and the ring-shaped conductive contact fingers are installed in the corresponding conductive contact finger slots; there are two mounting holes, which are respectively arranged on the front and lower side of the conductive contact finger slots. The first installation hole, the second installation hole arranged on the upper rear side of the conductive contact finger groove; the spacer in the first installation hole is used to limit the moving contact of the ground contact seat moving to the front end, the second installation hole The spacer in the middle is used to limit the moving contact moving to the closing contact seat at the upper end; the spacer is used to limit the position between the left and right conductive contact plate and to limit the position of the ring conductive contact finger. The amount of compression is controlled, and the setting of the spacer needs to meet the requirements of the rotation stroke of the moving contact, and the closing and grounding positions are limited. 2 . The conductive assembly according to claim 1 , wherein the conductive contact seat has a mounting plane provided at its lower part for fixed electrical connection with the lower outgoing line row. 3 . 3. Disconnector, characterized in that: it includes a conductive component, a movable contact, and an insulating main shaft that is installed for the movable contact and is connected to the movable contact by an axis extending in the left and right directions. The conductive component includes a conductive contact seat and a set An annular conductive contact finger on the conductive contact seat. The conductive contact seat is provided with a spindle perforation for the insulating spindle to wear and can rotate freely. The axis of the spindle perforation extends along the left and right directions. The periphery of the perforation is used for electrical connection with the sliding contact of the moving contact when the moving contact rotates with the insulating main shaft. The conductive contact seat is a split structure including left and right conductive contact seat boards arranged at intervals on the left and right. A gap for accommodating the movable contact is formed between the right conductive contact plates, and the annular conductive contact fingers include an annular left conductive contact finger arranged on the left conductive contact plate and an annular right conductive contact arranged on the right conductive contact plate Refers to, there is a spacer between the left and right conductive contact plates to limit the distance between the left and right conductive contact plates, and the left and right conductive contact plates are located on both sides of the moving contact. A mounting hole is provided, and the spacer is rotated and assembled on the conductive contact seat through the cooperation of the pin shaft and the mounting hole. The moving contact has a mating surface that contacts and conducts with the ring-shaped conductive contact finger; the left and right conductive contact seat plates There are ring-shaped conductive contact finger grooves arranged on the opposite sides of the body, and the ring-shaped conductive contact fingers are installed in the corresponding conductive finger grooves; there are two mounting holes, which are respectively arranged on the front lower side of the conductive finger groove The first installation hole, the second installation hole set on the upper rear side of the conductive contact finger groove; the spacer in the first installation hole is used to limit the moving contact of the ground contact seat moving to the front end, the second installation The spacer in the hole is used to limit the moving contact moving to the closing contact seat at the upper end; the spacer is used to limit the position between the left and right conductive contact plates and to limit the position of the ring-shaped conductive contact finger. The amount of compression is controlled, and the setting of the spacer needs to meet the requirements of the rotating stroke of the moving contact, and limit the position of closing and grounding. 4. The isolating switch according to claim 3, wherein the mating surface is a plane. 5. The isolating switch according to any one of claims 3-4, characterized in that: the isolating switch also includes a isolating switch bracket, and the isolating switch bracket is provided with left and right mounting plates and setting plates for installing the insulating main shaft. Between the left and right mounting plates, the moving contact beam for installing the moving contact of the isolating switch and the static contact beam for installing the static contact of the isolating switch. 6. The ring network cabinet, including the cabinet body and the isolating switch arranged inside the cabinet body, is characterized in that: the isolating switch includes a conductive component, a moving contact and an axis for installing the moving contact and connecting with the moving contact along the left and right The insulating main shaft extending in the direction, the conductive component includes a conductive contact seat and an annular conductive contact finger arranged on the conductive contact seat, the conductive contact seat is provided with a main shaft through hole for the insulating main shaft to wear and can rotate freely, The axis of the main shaft perforation extends along the left and right directions, and the ring-shaped conductive contact fingers are arranged on the periphery of the main shaft perforation for electrical connection with the sliding contact of the moving contact when the moving contact rotates with the insulating main shaft. The conductive contact seat is a split structure including left and right intervals The left conductive contact seat plate and the right conductive contact seat plate are provided, and a gap for accommodating the moving contact is formed between the left and right conductive contact seat plates. The ring-shaped conductive contact finger includes a ring-shaped left conductive The contact finger and the ring-shaped right conductive contact finger arranged on the right conductive contact seat plate, a spacer is arranged between the left and right conductive contact seat plates to limit the distance between the left and right conductive contact seat plates, The left and right conductive contact seat plates are provided with installation holes on the front and rear sides of the moving contact. Contact the mating surface of the conductive mating; the opposite sides of the left and right conductive contact seat plates are provided with annular conductive contact finger grooves, and the annular conductive contact fingers are installed in the corresponding conductive contact finger grooves; the installation There are two holes, which are the first installation hole arranged on the front and lower side of the conductive contact finger groove, and the second installation hole arranged on the upper and rear side of the conductive contact finger groove; the spacer in the first installation hole is used to move to the The moving contact of the grounding contact seat at the front end is used to limit the position, and the spacer in the second installation hole is used to limit the moving contact moving to the closing contact seat at the upper end; the spacer is used to conduct electricity to the left and right The position between the contact seat plates is limited and the compression amount of the ring-shaped conductive contact is controlled. The setting of the spacer sleeve needs to meet the rotation stroke requirements of the moving contact, and the closing and grounding positions are limited.