WO2020181898A1

WO2020181898A1 - Isolation switch and conductive base thereof

Info

Publication number: WO2020181898A1
Application number: PCT/CN2019/130783
Authority: WO
Inventors: 孙玉洲; 李付永; 高坚; 王巧红; 郭海涛; 陈亚亚; 孙龙勇; 师丽芳; 钟荣松; 姚灿江
Original assignee: 河南平高电气股份有限公司; 平高集团有限公司; 国家电网有限公司
Priority date: 2019-03-14
Filing date: 2019-12-31
Publication date: 2020-09-17
Also published as: CN109950085A

Abstract

An isolation switch and a conductive base thereof, which relate to the technical field of high-voltage switch devices, and which may solve the problems in the prior art wherein conductive bases are high-cost and a heat dissipation effect is poor. The isolation switch comprises a conductive tube assembly and a conductive base (10) used for mounting the conductive tube assembly, and the conductive base comprises a base body; the base body is provided thereon with a conductive tube hinge base (16) for hinging the conductive tube assembly, and a flange mounting base (18) that rotatably assembles a corresponding drive flange (10); the base body is formed from two support beams (11) arranged at an interval; the conductive tube hinge base (16) and the flange mounting base (18) are located at two ends of the support beams (11) respectively and are fixed between the two support beams (11); and the support beams (11), the conductive tube hinge base (16) and the flange mounting base (18) constitute a frame-like structure.

Description

Isolating switch and its conductive base

Cross references to related applications

This application is based on a Chinese patent application with an application number of 201910194492.5 and an application date of March 14, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application by reference.

Technical field

This application relates to the technical field of high-voltage switchgear, in particular to an isolating switch and its conductive base.

Background technique

Isolation switch is one of the main equipment in high-voltage power transmission and transformation equipment, and can realize the disconnection and closing of the transmission line after being connected to the transmission line. For example, the authorization announcement number is CN202159617U and the authorization announcement date is 2012.03.07. A double-post horizontal telescopic outdoor high-voltage AC disconnect switch disclosed in the document, mainly includes a pillar insulator, a base set on the pillar insulator, and a connecting rod mechanism The assembly of the conductive tube assembled on the base can drive the upper conductive tube and the lower conductive tube in the assembly of the conductive tube to fold or extend through the corresponding action of the link mechanism, and the movable contact set on the upper conductive tube is driven by the lower conductive tube The bottom is matched with the static contact to realize the opening and closing action of the disconnect switch. The action of the linkage mechanism is generally driven by a rotating insulator. A drive flange is provided between the drive member and the insulator of the linkage mechanism, and a flange mounting seat for installing the drive flange is correspondingly provided on the base. And the conductive tube hinge seat used to assemble and articulate the conductive tube, the conductive tube assembly has an accurate action rule through the linkage mechanism to ensure the accuracy of opening and closing. This kind of opening and closing action is realized through the relative movement of the conductive tube The isolation switch is widely used because of its simple structure and reliable action.

The authorized announcement number is CN203367122U, and the patent document with the authorized announcement date of 2013.12.25 discloses a folding arm type high voltage isolating switch, which includes a movable contact assembly and a static contact composed of a transmission base and a motor, and a movable contact assembly It includes a conductive tube assembly composed of relatively rotatable upper and lower conductive tubes. A flange plate is arranged on the transmission seat. The flange plate is connected with the conductive tube assembly and transmission through a connecting rod mechanism, thereby driving the lower conductive tube in the opening and closing positions Swing back and forth, correspondingly, the upper conductive tube is driven by the lower conductive tube to realize the opening and closing action of the isolating switch. After the transmission base is connected with the terminal board, the transmission base forms a conductive base that conducts the lower conductive tube and the external bus circuit. In order to ensure the stable support of the conductive tube assembly and the connecting rod mechanism, the transmission base generally uses castings, but the problem is : The use of castings as conductive bases must consider both current flow and strength issues, which will lead to waste of raw materials and increased costs, and castings are often thicker. After current passes through the conductive base, it is not conducive to heat dissipation.

Summary of the invention

The purpose of the embodiments of the present application is to provide a conductive base of an isolating switch, which can solve the problems of high cost and poor heat dissipation of the conductive base in the prior art. Another purpose of the embodiments of the present application is to provide an isolating switch that can solve the current problems. There are the problems of high cost and poor heat dissipation of the conductive base in the technology, which ensures the working stability of the isolation switch.

In order to achieve the foregoing objective, the isolating switch in the embodiment of the present application adopts the following technical solutions:

The isolating switch includes a conductive tube assembly and a conductive base for the installation of the conductive tube. The conductive base includes a base, and the base is provided with a conductive tube hinge seat for the conductive tube assembly and hinge and a corresponding driving method Flange mounting seat for rotating assembly, the base body is formed by two spaced support beams, the conductive tube hinge seat and the flange mounting seat are respectively located at the two ends of the support beam and are both fixed in two Between the supporting beams, the supporting beam, the conductive tube hinge seat and the flange mounting seat constitute a frame structure.

The beneficial effect is that: two spaced support beams are used to form the base of the conductive base, and the conductive tube hinge seat and the flange mounting seat can form a stable frame structure, and while supporting the conductive tube assembly, The redundant structure is reduced, the utilization rate of raw materials is improved, and the production cost is reduced; and the two support beams are arranged at intervals, which has a larger heat dissipation space when the support beams are conductive, which can improve the heat dissipation effect of the conductive base and the stability of the isolation switch Sex.

Further, the support beam includes vertical plate parts arranged opposite to each other along the direction in which the two support beams are arranged at intervals, and also includes a transverse plate arranged perpendicular to the vertical plate to strengthen the support beam Body part.

The beneficial effect is that the support beam is formed by the combination of the horizontal plate body and the vertical plate body, which can simplify the structure and optimize the cost while ensuring the strength.

Further, the support beam is formed by a bent plate with an L-shaped cross section.

The beneficial effect is that the technology of processing the bent plate with the L-shaped cross section is mature and the yield rate is high, and the complete set progress is fast.

Further, the flange mounting seat includes a supporting plate spanning between the top surfaces of the two supporting beams, and one end of the supporting beam provided with the supporting plate is also fixedly connected to the two supporting beams. Wiring board between beams.

The beneficial effect is that the main structure of the flange mounting seat adopts a supporting plate, which reduces the use of redundant structures.

Further, the wiring board has a Y-shaped structure and includes a horizontal wiring board main body, and the vertical board body of the supporting beam is respectively provided on the wiring board main body at two positions corresponding to the top of the Y shape. The side surface is attached to the fixed connecting lug plate, and the part of the wiring board main body located between the two connecting lug plates forms an escape recess for avoiding the driving flange.

The beneficial effect is that the wiring board is a Y-shaped structure, and each branch has a different function: the top two branches form a fixed part fixed to the support beam, the remaining branches form a diversion part connected to the external bus, and the top two branches The drive flange can pass through between the spaces, forming an avoiding recess that avoids the drive flange, making the structure of the entire conductive base more compact.

Further, the flange mounting seat is provided with a limit plate, and the limit plate is provided with a limit member for limiting the limit swing position of the driving arm connected to the driving flange.

The beneficial effect is that a limit plate is provided on the flange mounting seat to limit the movement of the conductive tube assembly, which can further ensure the accuracy of opening and closing actions.

Further, the limiting plate is formed of an L-shaped plate arranged along the extension direction of the support beam, and the limiting plate has a vertical part connected with the flange mounting seat, and the vertical part is There is a limit surface that restricts the driving arm to continue to rotate after the isolation switch is opened and closed, and the vertical part correspondingly forms the limit member.

The beneficial effect is that: L-shaped plates are used to form the limit plate, and the structure is simple and easy to manufacture.

Further, the conductive tube hinge seat includes a bottom plate spanning between the bottom surfaces of the two supporting beams, and also includes two supporting plates that are closely fixed to the sides of the two supporting beams. The lower side of the board is fixedly connected with the bottom board.

The beneficial effect is that the hinged seat of the conductive tube is installed in a sinking manner between the two support beams, the structure of the support beam is fully utilized, the conductive base structure is more compact, and the layout of redundant structures is reduced.

In order to achieve the foregoing objectives, the conductive base of the isolating switch in the embodiment of the present application adopts the following technical solutions:

The conductive base of the isolating switch includes a base body. The base body is provided with a conductive tube hinge seat for assembling the conductive tube and a flange mounting seat for rotating and assembling the corresponding drive flange. The base body is composed of two spaced apart The supporting beam is formed, the conductive tube hinge seat and the flange mounting seat are respectively located at both ends of the supporting beam and both are fixed between the two supporting beams, the supporting beam and the conductive tube hinge seat, The flange mounting seat constitutes a frame structure.

The beneficial effect is that: two spaced support beams are used to form the base of the conductive base, and the conductive tube hinge seat and the flange mounting seat can form a stable frame structure, and while supporting the conductive tube assembly, The redundant structure is reduced, and the utilization rate of raw materials is improved; and the two supporting beams are arranged at intervals, so that when the supporting beams are conductive, there is a larger heat dissipation space, which can improve the heat dissipation effect of the conductive base.

The beneficial effect is that the support beam is formed by the combination of the horizontal plate body and the vertical plate body, and the structure is simplified as much as possible while ensuring the strength, and the use of materials is reduced.

The beneficial effect is that the technology for processing the bent plate with the L-shaped cross section is mature and easy to manufacture.

The beneficial effect is that the main structure of the flange mounting seat adopts the supporting plate, which reduces the use of redundant structure.

Further, the limiting plate is formed of an L-shaped plate arranged along the extension direction of the supporting beam, and the limiting plate has a vertical part connected with the flange mounting seat, and the vertical part is There is a limit surface that restricts the driving arm to continue to rotate after the isolation switch is opened and closed, and the vertical part correspondingly forms the limit member.

The beneficial effect is that L-shaped plates are used to form the limit plate, which is easy to manufacture.

Description of the drawings

Figure 1 is a schematic structural diagram of an isolating switch in an embodiment of the application;

FIG. 2 is a top view of the partial structure of the isolating switch in the embodiment of the application;

3 is a schematic diagram of the assembly of the conductive base and the conductive tube of the isolating switch in the embodiment of the application, and the conductive tube is assembled in a folded state in the figure;

4 is a schematic diagram of the structure of the conductive base of the isolating switch in the embodiment of the application;

5 is a schematic diagram of the connection structure between the upper conductive tube and the lower conductive tube of the isolating switch in an embodiment of the application;

Fig. 6 is a front view of the conductive base when the isolating switch is opened in the embodiment of the application;

Fig. 7 is a top view of the conductive base when the isolating switch is opened in the embodiment of the application;

Figure 8 is a front view of the conductive base when the isolating switch is closed in the embodiment of the application;

Fig. 9 is a top view of the conductive base when the isolating switch is closed in the embodiment of the application.

In the figure: 10-conducting base; 11-support beam; 111-transverse plate; 112-vertical plate; 12-driving arm; 13-driven rod; 14-swing seat; 15-limit angle steel; 151 -Limit screw; 16- conductive tube hinge seat; 17- wiring board; 171- avoid recess; 18- flange mounting seat; 19- drive flange; 20- lower conductive tube; 21- gear box; 30- upper conductive Tube; 31-transmission arm; 40-moving contact; 50-static contact; 60-post insulator; 70-conducting belt; 71-connecting piece; 80-stop pin.

detailed description

The implementation of the isolating switch and its conductive base in the embodiments of the present application will now be described with reference to the accompanying drawings.

As shown in Figure 1, the isolating switch includes a support part and a switch part arranged on the support part. The switch part includes a conductive base 10 and a conductive tube assembly arranged on the conductive base 10, and a movable contact 40 is provided on the conductive tube assembly. The switch part also includes a static contact 50 that is spaced apart from the conductive base 10. The movable contact 40 can contact and cooperate with the static contact 50 under the drive of the conductive tube assembly to realize the isolation switch closing, or the movable contact 40 The isolation switch is opened in the opposite way. The supporting part includes a post insulator 60, which is further divided into a supporting insulator that plays a supporting role and a rotating insulator that drives the assembly of the conductive tube through its own rotation.

As shown in Figure 2, the conductive tube assembly includes an upper conductive tube 30 and a lower conductive tube 20 that are connected in transmission. The lower conductive tube 20 is in transmission connection with the conductive base 10, and the upper conductive tube 30 is provided with a movable contact matched with a static contact 50. 40. The lower conductive tube 20 acts as an active part, which can drive the upper conductive tube 30 to swing when it swings. The conductive base 10 can drive the lower conductive tube 20 to rotate to realize the upper conductive tube 30 approaching or moving away from the static contact 50. In order to ensure good conduction between the upper conductive tube 30 and the lower conductive tube 20, a conductive tape 70 is arranged between the two conductive tubes, and the conductive tape 70 is correspondingly connected to the conductive tube through a connecting piece 71.

As shown in Figures 3 and 4, the conductive base 10 includes two parallel support beams 11, the support beams 11 are made of conductive material, when the lower conductive tube 20 and the conductive base 10 are connected in transmission, the lower conductive tube 20 and the conductive When the base 10 is connected, the supporting beam 11 also forms the base of the conductive base 10 correspondingly. The conductive base 10 also includes a link mechanism for directly driving the lower conductive tube 20 to rotate to realize opening and closing actions. The linkage mechanism is a spatial linkage mechanism, including a driving arm 12 that rotates on a horizontal plane and a swing seat 14 that rotates on a vertical plane for driving the lower conductive tube 20 to move. The swing seat 14 has a U-shaped structure and is arranged in Between two supporting beams. Although the shape of the swing seat 14 is different from that of the rod, its function and movement mode are the same as those of the rod. A hinge shaft extending in the vertical direction is provided on the driving arm 12, and a hinge shaft connected with other followers to drive itself to swing is provided on the swing seat 14, because the driving arm 12 and the swing seat 14 move The directions are different, so the arrangement directions of the two different hinge shafts are also different, and the hinge shafts on the swing seat 14 extend in the horizontal direction.

A driven rod 13 as a follower is also provided between the driving arm 12 and the swing base 14. One end of the driven rod 13 is hinged with the driving arm 12, and the other end is hinged with the swing base. The two ends of the driven rod 13 are hinged. The axes are also different. In order to ensure the smooth movement of the spatial linkage mechanism, both ends of the driven rod 13 are hinged with the driving arm 12 and the swing seat 14 through a spherical hinge structure.

The supporting beam 11 includes a vertical plate body 112 arranged opposite to each other in a direction in which two supporting beams 11 are arranged at intervals, and also includes a transverse plate body 111 arranged perpendicular to the vertical plate body 112 to strengthen the supporting beam 11. The horizontal plate body 111 and the vertical plate body 112 are connected so that the cross section of the support beam 11 is L-shaped, and the bent plate can be directly used when the support beam 11 is manufactured. The two supporting beams 11 are arranged in a parallel manner, and a certain interval is reserved between the two supporting beams 11. A flange mounting seat 18 is fixed at one end of the transverse plate body 111 of the two support beams 11 by threaded fasteners. The specific structure is a support plate spanning the top surface of the two support beams 11, and the flange mounting seat 18 is provided There is a through hole for the drive shaft connected with the driving arm 12 to pass through from bottom to top to be connected with the driving arm 12, and a limit plate is also provided on the flange mounting seat 18. Specifically, the limit plate is formed by a cross section It is formed of an L-shaped limit angle steel 15. The limit angle steel 15 has a horizontal part fixedly connected to the flange mounting seat 18 and a vertical part connected to the horizontal part. The vertical part faces the driving arm 12 and is provided with a drive The arm 12 blocks the matched limit screw 151, and the operator can adjust the stop position of the limit angle 15 to restrict the rotation of the driving arm 12 by screwing the limit screw 151.

At the other end of the two support beams 11, a conductive tube hinge seat 16 fixedly connected to the vertical plate 112 of the support beam 11 by threaded fasteners is provided. The conductive tube hinge seat 16 is hinged with the swing seat 14 to provide the swing seat 14 A support, the conductive tube hinge seat 16 includes a bottom plate spanning between the bottom surfaces of the two support beams 11, and also includes two support plates that are fitted and fixed on the inner sides of the two vertical plates. The lower sides of the two support plates are connected to The bottom plate is fixedly connected. The two supporting beams 11 form a stable frame structure through the flange mounting seat 18 and the conductive tube hinge seat 16. There are two pillar insulators 60 matched with the conductive base 10, which are respectively a support insulator fixedly connected to the bottom of the conductive tube hinge seat 16 to support the conductive base 10, and a transmission insulator with a drive shaft arranged inside. The transmission insulator is not directly connected with The conductive base 10 is matched. As shown in Figures 6 and 8, a drive flange 19 arranged axially in the vertical direction is connected to the bottom of the drive arm 12 through an adapter shaft, and the drive flange is passed through a rotation stop pin. 80 realizes the anti-rotation cooperation with the adapter shaft. When the driving flange 19 rotates, it can drive the adapter shaft and the driving arm 12 to move synchronously. The transmission insulator cooperates with the driving flange 19 to support the conductive base 10. The lower conductive tube 20 and the support beam 11 of the conductive base 10 are electrically connected by a conductive tape 70. One end of the conductive tape 70 is connected to the conductive tube through a connecting piece 71, and the other end is connected to the transverse plate of the supporting beam 11 through a connecting piece 71.体111上。 Body 111. On one end of the conductive base 10 close to the flange mounting seat 18, there is also a wiring board 17 connected to the vertical plate 112 of the support beam 11. The wiring board 17 is a Y-shaped structure, and the main body of the wiring board 17 is arranged in the horizontal direction. Two positions on the main body of the wiring board 17 corresponding to the top of the Y-shape are respectively provided with connecting lug plates arranged in the vertical direction. When the wiring board 17 is fixed between the two support beams 11, the connecting lug plates are attached and fixed on On the inner side of the vertical plate body 112, an avoiding recess 171 for avoiding the driving flange 19 is formed on the main body of the wiring board 17 between the two connecting lugs.

As shown in Figure 5, the lower conductive tube 20 is also provided with a rack that moves along the axial direction of the lower conductive tube 20 and a gear matched with the rack. The gear is in transmission connection with the transmission arm 31 of the upper conductive tube 30. During the action, the upper conductive tube 30 has an accurate movement track through the gear and rack meshing transmission to ensure the accuracy of the opening and closing actions. A gear box 21 is provided at one end of the lower conductive tube 20 close to the upper conductive tube 30, and the gear box 21 is formed by a combination of two parts, and its radial dimension is smaller than that of the lower conductive tube 20.

As shown in FIGS. 6 to 9, the extension direction of the conductive base 10 is defined as the front-rear direction. Specifically, the wiring board 17 is located at the front end of the conductive base 10, and the swing base 14 is located at the rear end of the conductive base 10. The limit angle steel 15 and the flange mounting seat 18 are arranged perpendicularly. When the driving arm 12 rotates forward, it will drive the swing seat 14 to swing forward. As shown in Figures 6 and 7, the driving arm 12 rotates to the limit position. When the upper and front limit screws 151 of the angle steel 15 are matched, the upper conductive tube 30 and the lower conductive tube 20 are in a folded state, and the isolating switch is opened at this time. As shown in Figures 8 and 9, when the driving arm 12 rotates toward the rear, the swing seat 14 swings backward, and the driving arm 12 rotates to match the upper rear limit screw 151 of the limit angle steel 15, and the upper conductive tube 30 In the extended state with the lower conductive tube 20, the movable contact 40 on the upper conductive tube 30 cooperates with the static contact 50 to realize the conduction of the circuit, the isolation switch is in the closed state, and the current passes through the upper conductive tube 30 and the lower conductive tube in turn 20 and the conductive base 10, and lead the current to the external bus through the wiring board 17. The part of the limit angle steel 15 that is perpendicular to the flange mounting seat has a limit surface that restricts the driving arm 12 from continuing to rotate after the isolation switch is opened and closed.

In other embodiments, the structure of the supporting beam can be adjusted accordingly, for example, square steel, cylindrical steel pipe, I-beam and other extensions are used.

In other embodiments, the arrangement position of the wiring board on the support beam can be adjusted, for example, set in the middle of the support beam, or set at the end of the support beam. At this time, in order to ensure the overall strength of the conductive base, the two supports Reinforcing plates are arranged between the beams.

In other embodiments, the structure of the wiring board can be adjusted accordingly, such as a square structure or a circular structure.

In other embodiments, the driving device that drives the driving arm can be directly restricted to limit the rotation angle of the driving arm, and it is not necessary to set a limit structure on the support beam to restrict the driving arm's action.

In other embodiments, the structure of the limit plate can be adjusted accordingly, such as a flat plate.

In other embodiments, the conductive tube hinge seat can be arranged on the top of the two supporting beams, instead of being arranged by sinking between the two supporting beams.

The structure of the conductive base in the embodiment of the present application is the same as the conductive base structure in the above-mentioned isolation switch embodiment, and the method of use is also the same, so the implementation of the conductive base will not be repeated.

The specific implementations described above further describe the application purpose, technical solutions, and beneficial effects of this application. It should be understood that the above are only specific implementations of the application and are not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

The conductive base of the isolating switch, the conductive base includes a base body, the base body is provided with a conductive tube hinge seat for assembling the conductive tube and a flange mounting seat for rotating and assembling the corresponding driving flange, and the base body is composed of two spaced apart The supporting beam is formed, the conductive tube hinge seat and the flange mounting seat are respectively located at both ends of the supporting beam and both are fixed between the two supporting beams, the supporting beam and the conductive tube hinge seat, The flange mounting seat constitutes a frame structure.
The conductive base of the isolating switch according to claim 1, wherein the supporting beam includes vertical plate parts arranged opposite to each other along the direction in which the two supporting beams are arranged at intervals, and further comprising a vertical plate arranged perpendicular to the vertical plate The transverse plate part that strengthens the support beam.
According to the conductive base of the isolating switch according to claim 2, the supporting beam is formed by a bent plate with an L-shaped cross section.
The conductive base of the isolating switch according to claim 2 or 3, the flange mounting seat includes a supporting plate that bridges between the top surfaces of the two supporting beams, and the supporting beam is provided with the supporting plate One end is also provided with a wiring board fixedly connected between the two supporting beams.
The conductive base of the isolating switch according to claim 4, the wiring board is a Y-shaped structure, including a horizontal wiring board main body, the wiring board main body is respectively provided with two positions corresponding to the top of the Y-shaped The inner side surface of the vertical plate of the support beam is attached to a fixed connecting ear plate, and a part of the wiring board main body located between the two connecting ear plates forms an escape recess for avoiding the driving flange.
The conductive base of the isolating switch according to any one of claims 1-3, the flange mounting seat is provided with a limit plate, and the limit plate is provided with a drive for connecting the drive flange A limiter that limits the limit swing position of the crank arm.
The conductive base of the isolating switch according to claim 6, wherein the limit plate is formed of an L-shaped plate arranged along the extension direction of the support beam, and the limit plate is provided with the flange mounting seat The connected vertical part has a limit surface that restricts the driving arm to continue to rotate after the isolation switch is opened and closed, and the vertical part correspondingly forms the limit member.
The conductive base of the isolating switch according to any one of claims 1-3, the conductive tube hinge seat includes a bottom plate spanning between the bottom surfaces of the two supporting beams, and also includes two pieces that are attached and fixed on the two The supporting beams are close to the supporting plates on the side surfaces, and the lower sides of the two supporting plates are fixedly connected with the bottom plate.
The isolating switch includes a conductive tube assembly and a conductive base for mounting the conductive tube assembly, and the conductive base is the conductive base of the isolating switch according to any one of claims 1-8.