Shielding piece for isolating switch and isolating switch

Abstract

The utility model relates to the technical field of power equipment, in particular to a shielding piece for an isolating switch and the isolating switch. The isolating switch comprises a conductor and an insulating cylinder, the conductor and the insulating cylinder are fixedly connected through a shielding piece, the shielding piece comprises an annular connecting disc, and a conductor connecting hole used for being connected with the conductor of the isolating switch and an insulating cylinder connecting hole used for being connected with the insulating cylinder of the isolating switch are formed in the position, close to an inner hole, of the connecting disc. The conductor connecting hole is located at the side, away from the connecting disc inner hole, of the insulating cylinder connecting hole, an insulating cylinder shielding bowl is arranged on one side of the outer edge of the connecting disc, a conductor shielding bowl is arranged on the other side of the outer edge of the connecting disc, and the connecting disc, the insulating cylinder shielding bowl and the conductor shielding bowl are of an integrated structure. The device can effectively solve the problems that an existing connecting structure is complex in installation and high in cost, and the device is simple in structure and convenient to install, disassemble and maintain.

Description

Technical Field

[0001] The utility model relates to the field of high-voltage switches, in particular to a shielding component for an isolating switch and the isolating switch. Background Art

[0002] GIS (Gas Insulated Metal-Enclosed Switchgear) is widely used in substations due to its reliable operation, space-saving design, easy installation, and low maintenance requirements. GIS equipment includes busbars, circuit breakers, disconnectors, earthing switches, and voltage transformers. Disconnectors are non-arc-extinguishing switching devices used for isolating power, switching operations, and connecting and disconnecting low-current circuits. They primarily ensure the safety of high-voltage equipment during maintenance and serve to isolate voltage levels.

[0003] The isolating switch is mainly composed of moving and static contacts, isolating blades, insulators and metal frames. There are connecting parts inside the isolating switch to connect the conductor and the insulating tube. The internal connection structure of the traditional isolating switch usually consists of multiple connecting parts, such as Figure 1-2 As shown, the connection structure in the prior art is divided into four parts. The conductor connecting plate 14 and the conductor shielding member 13 are in contact with each other. Bolt holes are provided on the conductor connecting plate 14, and corresponding threaded holes are provided on the conductor shielding member 13. The conductor connecting plate 14 and the conductor shielding member 13 are fixedly connected by bolts 10. A threaded hole is also provided on the conductor 1. Another bolt 10 is passed through the conductor connecting plate 14 to fix it with the conductor 1, thereby fixing the conductor connecting plate 14 and the conductor shielding member 13 together on the conductor 1; in addition, the insulating tube connecting plate 15 and the insulating tube shielding member 16 are also in contact with each other and the connection method is basically the same as the above-mentioned conductor 1 connection part. The insulating tube connecting plate 15 and the insulating tube shielding member 16 are also fixedly connected by bolts 10, and then another bolt 10 is passed through the insulating tube connecting plate 15 to fix it with the insulating tube 2.

[0004] The four connecting parts of the connection structure are connected and fixed to each other by bolts respectively. When tightening the bolts, there is a possibility of residual foreign matter. Foreign matter falling into the disconnector may affect the electric field distribution inside the disconnector and thus increase the risk of discharge. The large number of bolts used in the connection structure will increase this risk. In addition, the bolts have different specifications when used, which makes the installation process complicated and prone to errors, increasing the installation cost. Utility Model Content

[0005] The purpose of the utility model is to provide a shielding member for an isolating switch and an isolating switch, so as to solve the problems of complicated installation, easy error and high cost of the existing connection structure.

[0006] In order to solve the above problems, the shielding member for the isolating switch of the present invention adopts the following technical solutions:

[0007] A shielding component for an isolating switch, the structure includes an annular connecting disk, and a conductor connecting hole for connecting the conductor of the isolating switch and an insulating cylinder connecting hole for connecting the insulating cylinder of the isolating switch are respectively provided near the inner hole of the connecting disk. The conductor connecting hole is located on the side of the insulating cylinder connecting hole away from the inner hole of the connecting disk. The outer edge of the connecting disk is provided with an insulating cylinder shielding bowl on one side and a conductor shielding bowl on the other side. The connecting disk, insulating cylinder shielding bowl and conductor shielding bowl are an integrated structure.

[0008] Furthermore, the insulating cylinder connecting hole is a countersunk hole.

[0009] Furthermore, the connection plate is provided with a concave step surface along the inner circumference of the conductor connection hole for mounting the conductor inner shielding cylinder.

[0010] Furthermore, the wall thickness of the insulating tube shielding bowl and the conductor shielding bowl gradually increases from the bottom of the bowl to the bowl mouth.

[0011] Furthermore, the conductor shielding bowl is provided with a "U"-shaped notch near the bowl mouth, and there are two "U"-shaped notches, which are respectively provided on the center line of the connecting disk at a 90° angle.

[0012] Beneficial effects: The shielding member for disconnectors of the present invention is an improved invention. Compared with the prior art, the structure of the present invention is improved, especially in the connection portion between the conductor and the insulating cylinder. The use of an integrated shielding member can reduce the connection and coordination between the various connectors. The shielding member includes an annular connecting disk, on which a conductor connecting hole and an insulating cylinder connecting hole are respectively provided to facilitate subsequent installation and connection. The conductor connecting hole is located on the side of the insulating cylinder connecting hole away from the inner hole of the connecting disk. Usually, the diameter of the insulating cylinder is slightly larger than that of the conductor. The connecting holes are staggered to adapt to the structure of the conductor and the insulating cylinder, which is convenient for installation and positioning. The outer edge of the connecting disk is provided with an insulating cylinder shielding bowl on one side and a conductor shielding bowl on the other side, which are used to shield the electric field at the connection position.

[0013] In order to solve the above problems, the isolating switch of the present invention adopts the following technical solutions:

[0014] A disconnector, which structure includes a conductor and an insulating cylinder, wherein the conductor and the insulating cylinder are fixedly connected by a shielding member, wherein the shielding member includes an annular connecting disk, wherein a conductor connecting hole for connecting the conductor of the disconnector and an insulating cylinder connecting hole for connecting the insulating cylinder of the disconnector are respectively provided near the inner hole of the connecting disk, wherein the conductor connecting hole is located on a side of the insulating cylinder connecting hole away from the inner hole of the connecting disk, an insulating cylinder shielding bowl is provided on one side of the outer edge of the connecting disk, and a conductor shielding bowl is provided on the other side, wherein the connecting disk, the insulating cylinder shielding bowl and the conductor shielding bowl are an integrated structure.

[0015] Furthermore, the insulating cylinder connecting hole is a countersunk hole.

[0016] Furthermore, the connection plate is provided with a concave step surface along the inner circumference of the conductor connection hole for mounting the conductor inner shielding cylinder.

[0017] Furthermore, the wall thickness of the insulating tube shielding bowl and the conductor shielding bowl gradually increases from the bottom of the bowl to the bowl mouth.

[0018] Furthermore, the conductor shielding bowl is provided with a "U"-shaped notch near the bowl mouth, and there are two "U"-shaped notches, which are respectively provided on the center line of the connecting disk at a 90° angle.

[0019] Beneficial effects: The disconnector of the present invention is an improved invention. Compared with the prior art, the structure of the present invention is improved, especially in the connection part between the conductor and the insulating cylinder. The use of an integrated shielding member can reduce the connection and coordination between the various connecting parts. The shielding member includes an annular connecting disk, on which a conductor connection hole and an insulating cylinder connection hole are respectively provided to facilitate subsequent installation and connection. The conductor connection hole is located on the side of the insulating cylinder connection hole away from the inner hole of the connecting disk. Usually, the diameter of the insulating cylinder is slightly larger than that of the conductor. The connection holes are staggered to adapt to the structure of the conductor and the insulating cylinder, which is convenient for installation and positioning. The outer edge of the connecting disk is provided with an insulating cylinder shielding bowl on one side and a conductor shielding bowl on the other side, which are used to shield the electric field at the connection position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the connection structure between the insulation cylinder and the conductor of the original disconnector;

[0021] Figure 2 for Figure 1 Schematic diagram of the decomposition;

[0022] Figure 3 This is a schematic diagram of the connection structure between the insulating cylinder and the conductor of the disconnector of the utility model;

[0023] Figure 4 for Figure 3 Schematic diagram of the decomposition;

[0024] Figure 5 This is a connection diagram of a specific embodiment of the utility model;

[0025] Figure 6 for Figure 5 side view.

[0026] In the figure: 1. Conductor; 2. Insulating tube; 3. Connecting plate; 4. Conductor connecting hole; 5. Insulating tube connecting hole; 6. Conductor shielding bowl; 7. Insulating tube shielding bowl; 8. Countersunk hole; 9. Step surface; 10. Bolt; 11. Inner shielding tube; 12. Notch; 13. Conductor shielding part; 14. Conductor connecting plate; 15. Insulating tube connecting plate; 16. Insulating tube shielding part. DETAILED DESCRIPTION

[0027] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0028] The embodiment of the shielding member for the isolating switch of the present utility model is as follows:

[0029] This new shielding member for disconnectors can improve the cumbersome, error-prone, and costly installation of existing connection structures. By adopting an integrated design, this shielding member for disconnectors reduces the number of bolts required by eliminating the need for interlocking connecting parts, simplifying installation and reducing costs.

[0030] As a basic solution, Figure 1-6 As shown, the shielding member for the disconnector of the present invention includes an annular connecting plate 3, and the connecting plate 3 is respectively provided with a conductor connecting hole 4 for connecting the conductor 1 of the disconnector and an insulating cylinder connecting hole 5 for connecting the insulating cylinder 2 of the disconnector near the inner hole. The conductor connecting hole 4 and the insulating cylinder connecting hole 5 can be connected by a bolt 10. The bolt 10 has the advantages of simple installation and easy disassembly. The conductor connecting hole 4 is located on the side of the insulating cylinder connecting hole 5 away from the inner hole of the connecting plate 3. The outer edge of the connecting plate 3 is provided with an insulating cylinder shielding bowl 7 on one side and a conductor screen on the other side. The shielding bowl 6 is used to shield the electric field of the connecting bolts 10. The smooth transition of the bowl wall can avoid the generation of tip and edge effects. The connecting plate 3, the insulating tube shielding bowl 7 and the conductor shielding bowl 6 are an integrated structure and can be produced by a casting process. The casting process has the advantages of being convenient and fast, with small processing allowance and low production cost. In addition, the four connecting parts in the original technology are simplified into an integrated shielding part structure, which reduces the contact connection between the connecting surfaces, thereby reducing the use of bolts 10 and reducing the risk of discharge caused by residual foreign matter. At the same time, the cost will also be reduced due to the reduction in the number of bolts 10 used.

[0031] As a preferred embodiment, Figure 4-5 As shown, the insulating tube connection hole 5 is a countersunk hole 8. The countersunk hole 8 can avoid the change in the distribution of the surrounding electric field caused by the protrusion of the connection position. In addition, the protrusion of the connection position can be avoided, thereby ensuring the flatness of the shielding part for easy contact and connection. In other embodiments, the countersunk hole 8 is not provided, and the electric field can be shielded by adding a shielding cover, which will make the structure more complicated and the effect is poorer than that of the preferred embodiment.

[0032] As a preferred embodiment, Figure 4-5 As shown, the connection plate 3 is provided with a concave step surface 9 along the inner circumference at the conductor connection hole 4 for installing the inner shielding tube 11 of the conductor 1. The step surface 9 is provided to avoid problems caused by the protrusion of the connection position, and is provided along the inner circumference to facilitate the subsequent installation of the inner shielding tube 11. In other embodiments, it can also be provided as a countersunk hole 8. This structure is not conducive to the subsequent installation of the built-in shielding plate, but it can also achieve the effect of avoiding problems caused by the protrusion of the connection position.

[0033] As a preferred embodiment, Figure 3-5 As shown, the wall thickness of the insulating tube 2 shielding bowl and the conductor 1 shielding bowl gradually increases from the bottom of the bowl to the bowl mouth. The thinner wall thickness at the bottom of the bowl can reduce the weight of the shielding component, and the gradually thickening wall thickness towards the bowl mouth is to ensure that the electric field is optimized to ensure the stability of the shielding component during use, and it can also facilitate the demolding of the inner mold during casting.

[0034] As a preferred embodiment, Figure 6 As shown, the conductor shielding bowl 6 is provided with a "U"-shaped notch 12 near the mouth of the bowl. There are two "U"-shaped notches 12, which are respectively arranged on the center line of the connecting plate 3 at a 90° angle. The notch is provided to facilitate the avoidance of connection with other components on the conductor 1. In other embodiments, the hollow position can be adjusted according to the coordination position with other components without affecting its effect.

[0035] The embodiment of the isolating switch of the present utility model is as follows:

[0036] The disconnector includes a conductor 1 and an insulating cylinder 2. The conductor 1 and the insulating cylinder 2 are fixedly connected via a shielding member. The embodiment of the shielding member has been described above and will not be repeated here.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A shielding member for an isolating switch, characterized in that: It includes an annular connecting disk, and a conductor connecting hole for connecting the conductor of the disconnector and an insulating cylinder connecting hole for connecting the insulating cylinder of the disconnector are respectively provided near the inner hole of the connecting disk. The conductor connecting hole is located on the side of the insulating cylinder connecting hole away from the inner hole of the connecting disk. The outer edge of the connecting disk is provided with an insulating cylinder shielding bowl on one side and a conductor shielding bowl on the other side. The connecting disk, insulating cylinder shielding bowl and conductor shielding bowl are an integrated structure.

2. The shielding member for disconnector according to claim 1, wherein: The insulating cylinder connecting hole is a countersunk hole.

3. The shielding member for disconnector according to claim 1, wherein: The connection plate is provided with a concave step surface along the inner circumference of the conductor connection hole for mounting the conductor inner shielding cylinder.

4. The shielding member for disconnecting switch according to claim 1, 2 or 3, characterized in that: The wall thickness of the insulating tube shielding bowl and the conductor shielding bowl gradually increases from the bowl bottom to the bowl mouth.

5. The shielding member for disconnecting switch according to claim 1, 2 or 3, characterized in that: The conductor shielding bowl is provided with a "U"-shaped notch near the bowl mouth. There are two "U"-shaped notches, which are respectively arranged on the center line of the connecting disk at a 90° angle.

6. A disconnector comprising a conductor and an insulating cylinder, wherein the conductor and the insulating cylinder are fixedly connected via a shielding member, characterized in that: The shielding member includes an annular connecting disk, and a conductor connecting hole for connecting the conductor of the disconnector and an insulating cylinder connecting hole for connecting the insulating cylinder of the disconnector are respectively provided near the inner hole of the connecting disk. The conductor connecting hole is located on the side of the insulating cylinder connecting hole away from the inner hole of the connecting disk. The outer edge of the connecting disk is provided with an insulating cylinder shielding bowl on one side and a conductor shielding bowl on the other side. The connecting disk, insulating cylinder shielding bowl and conductor shielding bowl are an integrated structure.

7. The disconnector according to claim 6, characterized in that: The insulating cylinder connecting hole is a countersunk hole.

8. The disconnector according to claim 6, characterized in that: The connection plate is provided with a concave step surface along the inner circumference of the conductor connection hole for mounting the conductor inner shielding cylinder.

9. The disconnector according to claim 6, 7 or 8, characterized in that: The wall thickness of the insulating tube shielding bowl and the conductor shielding bowl gradually increases from the bowl bottom to the bowl mouth.

10. The disconnector according to claim 6, 7 or 8, characterized in that: The conductor shielding bowl is provided with a "U"-shaped notch near the bowl mouth. There are two "U"-shaped notches, which are respectively arranged on the center line of the connecting disk at a 90° angle.

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