GIS isolating switch

Abstract

The utility model relates to the field of parts of high-voltage circuit breakers, in particular to a GIS (Gas Insulated Switchgear) isolating switch, which comprises a movable contact seat, a static contact seat, a thin-shell-shaped movable contact shielding case and a thin-shell-shaped static contact shielding case, wherein the movable contact shielding case and the static contact shielding case are respectively and coaxially arranged with the movable contact seat and the static contact seat; and the moving contact shielding case and the static contact shielding case are adjustably arranged on the moving contact seat and the static contact seat along the radial directions of the moving contact seat and the static contact seat respectively. Therefore, the movable and static shielding cases can be directly installed on the movable and static contact seats, and the coaxiality does not need to be tediously detected and adjusted before assembly, so that the assembly efficiency of the movable and static contact shielding cases is improved. The problem that the assembly efficiency of the disconnecting switch is low due to the fact that the coaxiality detection and adjustment process is very troublesome before the moving and static contact shielding covers fixed through hot pressing in the existing disconnecting switch are assembled is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of parts of high voltage circuit breaker especially relates to a GIS disconnector. BACKGROUND

[0002] The application of the disconnector in GIS is very important and universal, the disconnector has the function of dividing and combining small current in the line in the power grid, the shielding cover of the movable and static contactor of the existing disconnector is formed by integral casting, the processing cycle is long and the quality is heavy, and the shielding cover is limited by the casting process, the surface smoothness of the casting is low, which is not conducive to the uniform distribution of the electric field of the fracture and affects the electrical performance of the whole disconnector.

[0003] In order to solve the above problems, the Chinese invention patent with publication number CN101320648A discloses a kind of gas insulation disconnector device, including movable and static contact seat and movable and static contact head and movable and static shielding cover assembly arranged coaxially with movable and static contact seat, movable and static shielding cover assembly includes movable and static shielding cover conductor fixed on the outer circumference of movable and static contact head seat and movable and static contact head shielding cover fixed on movable and static shielding cover conductor by hot pressing, movable and static contact head shielding cover is formed by integral spinning, and movable and static end shielding cover is processed by spinning forming, the processing cycle is fast, the processing mode is simple and the quality is light, and the shielding cover shell obtained by spinning forming has higher surface smoothness, which is conducive to the uniform distribution of the electric field of the fracture.

[0004] Movable and static contact head shielding cover is mainly used for the electric field near movable and static contact head, and movable and static contact head shielding cover should be coaxial with movable and static contact head, so before hot pressing assembly, assembly personnel need to detect and adjust the coaxiality of movable contact head shielding cover and static contact head shielding cover with movable contact seat and static contact seat respectively, and then hot pressing is carried out, but the detection and adjustment process of coaxiality before assembly is very troublesome, which makes the assembly efficiency low. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of GIS disconnector to solve the problem that the detection and adjustment process of coaxiality of movable and static contact head shielding cover fixed by hot pressing in existing disconnector before assembly is very troublesome, which leads to low disconnector assembly efficiency.

[0006] To achieve the above object, the GIS disconnector of the utility model adopts the following technical scheme:

[0007] A kind of GIS disconnector, including movable contact seat and static contact seat and the thin shell shape movable contact head shielding cover and static contact head shielding cover arranged coaxially with movable and static contact seat respectively, the movable contact head shielding cover and static contact head shielding cover are respectively installed on movable contact seat and static contact seat along the radial direction of movable and static contact seat.

[0008] Further, the moving contact shield and the static contact shield respectively comprise a connecting ring coaxially arranged with the moving contact seat and the static contact seat, and a ring-shaped crimping cover body fixed to the connecting ring, and the moving contact shield and the static contact shield are connected to the moving contact seat and the static contact seat through the connecting ring.

[0009] Further, the inner edge of the ring-shaped crimping cover body is fixed to the end face of the connecting ring, the outer edge of the ring-shaped crimping cover body is folded and crimped away from the other shield, and the tail of the outer edge is inwardly crimped.

[0010] Further, the connecting ring is mounted on the moving contact seat and the static contact seat through connecting screws, the center through hole of the connecting ring is used for allowing the moving contact to pass through when closing, a plurality of mounting adjusting holes are arranged on one of the connecting ring and the corresponding contact seat in the circumferential direction, the size of the mounting adjusting hole is greater than the size of the screw rod of the connecting screw, and a plurality of screw connection holes for cooperating with the connecting screw are arranged on the other.

[0011] Further, the mounting adjusting hole is arranged on the static contact seat, the screw connection hole is arranged on the connecting ring of the static contact shield, the connecting screw is connected through the mounting adjusting hole and the screw connection hole, and the screw head of the connecting screw is covered inside the ring-shaped crimping cover body.

[0012] Further, the mounting adjusting hole is arranged on the connecting ring of the moving contact shield, and the mounting adjusting hole is a counterbore, the screw connection hole is arranged on the moving contact seat, the connecting screw is connected through the mounting adjusting hole and the screw connection hole, and the screw head is sunk in the mounting counterbore.

[0013] Further, the plurality of mounting adjusting holes are uniformly arranged in the circumferential direction.

[0014] Further, the number of the screw connection holes and the mounting adjusting holes is three.

[0015] Further, the moving contact shield and the static contact shield are respectively adjustably mounted on the end of the moving contact seat and the static contact seat along the radial direction of the moving contact seat and the static contact seat.

[0016] Further, the ring-shaped crimping cover bodies of the moving contact shield and the static contact shield are stainless steel shields.

[0017] Beneficial effects: the GIS isolating switch of the utility model is an element changing invention. Specifically, it comprises moving and static contact seats and thin-shell moving and static contact head shields coaxially arranged with the moving and static contact seats, and the moving and static contact head shields are adjustably installed at the end of the moving and static contact seats along the radial direction of the moving and static contact seats. The utility model changes the fixing mode of the existing moving and static contact head shields by hot pressing into an adjustable installation mode, so that the moving and static contact head shields can be directly installed on the moving and static contact seats when installed, without the need for complicated detection and adjustment of the coaxiality before assembly, and the coaxiality of the moving and static contact head shields can be adjusted at any time when needed after assembly, thus improving the assembly efficiency of the moving and static contact head shields. The problem of low isolating switch assembly efficiency caused by the complicated detection and adjustment process of the coaxiality of the moving and static contact head shields fixed by hot pressing in the existing isolating switch before assembly is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of an embodiment of the GIS isolating switch of the utility model.

[0019] Figure 2 It is Figure 1 The structure of the moving contact head and the static contact head is shown in the enlarged view.

[0020] In the figure: 1, static contact seat; 2, moving contact seat; 3, moving contact head shield; 34, connecting ring; 4, static contact head shield; 43, annular crimped shield body; 50, installation and adjustment hole; 51, screw connection hole; 6, static contact head; 7, moving contact head; 9, insulating basin. DETAILED DESCRIPTION

[0021] When the isolating switch is in the process of opening and closing, the moving contact head gradually approaches the static arc contact head, and after complete contact, the two should theoretically be concentric, and the gap should meet the requirement of 4±0.5mm, but in the actual operation process, the centering of the two does not meet the gap requirement, and the moving and static end shields need to be adjusted for secondary centering. The utility model adjusts the installation of the moving and static contact head shields on the moving and static contact seats, so that the coaxiality of the moving and static contact head shields can be adjusted at any time when it does not meet the requirement, compared with the hot pressing mode used in the prior art to fix the shield and the corresponding contact head, the coaxiality between the shield and the corresponding contact head needs to be accurately detected and adjusted before hot pressing, and the utility model of the GIS isolating switch is more convenient to adjust the coaxiality between the shield and the corresponding contact head, saves time, and improves efficiency.

[0022] Based on the above idea, as Figure 1As shown, the most basic embodiment of the GIS disconnector of the utility model includes a moving contact seat 2, a static contact seat 1, and a thin-shell-shaped moving contact shield 3 and a static contact shield 4 coaxially arranged with the moving and static contact seats 1 respectively, the moving contact shield 3 and the static contact shield 4 are respectively installed on the moving contact seat 2 and the static contact seat 1 along the radial direction of the moving and static contact seats 1.

[0023] On the basis of the above-mentioned embodiments, in an embodiment, the moving contact shield 3 and the static contact shield 4 respectively include a connecting ring 34 coaxially arranged with the moving contact seat 2 and the static contact seat 1 and a ring-shaped crimped cover body 43 fixed on the connecting ring 34, the moving contact shield 3 and the static contact shield 4 are respectively connected to the moving contact seat 2 and the static contact seat 1 through the connecting ring 34. The connecting ring 34 is arranged at the end of the moving contact shield 3 and the static contact shield 4, the inner edge of the ring-shaped crimped cover body 43 is welded or screw-connected with the end face or the edge of the connecting ring 34, the outer edge of the ring-shaped crimped cover body 43 is folded and crimped away from the other shield, and the tail of the outer edge is inwardly crimped. In other embodiments, the connecting ring 34 can also be arranged inside the ring-shaped crimped cover body 43, a plurality of long-strip-shaped connecting pieces are arranged on the connecting ring 34, the connecting pieces extend to one side of the axial direction of the connecting ring 34, the ring-shaped crimped cover body 43 is connected to the connecting ring 34 through the plurality of long-strip-shaped connecting pieces, and the connecting ring 34 is fixedly connected to the corresponding contact seat. Alternatively, in other embodiments, the connecting ring 34 and the ring-shaped crimped cover body 43 are integrally rolled and crimped through a thin plate.

[0024] On the basis of the above-mentioned embodiments, in an embodiment, the connecting ring 34 is installed on the moving contact seat 2 and the static contact seat 1 through connecting screws, a central through hole of the connecting ring 34 is used to pass through the moving contact 7 when closing, a plurality of installation adjustment holes 50 are arranged on one of the connecting ring 34 and the corresponding contact seat in the circumferential direction, the size of the installation adjustment hole 50 is greater than the size of the screw rod of the connecting screw, and a plurality of screw connection holes 51 for cooperating with the connecting screw are arranged on the other. When centering adjustment is performed, the connecting screw is loosened, the moving and static contact shields 4 are moved, when the moving contact shield 3 and the static contact shield 4 are respectively moved to the coaxial positions of the moving contact 7 and the static contact 6, the connecting screw is passed through the installation adjustment hole 50 at this time and then screwed into the corresponding screw connection hole 51 to achieve the purpose of coaxially adjusting and installing the moving and static contact shields 4 respectively. Figure 2In the shown embodiment, the connecting structure of the static contact shield 4 and the static contact seat 1 is specifically that the static contact seat 1 is provided with a mounting adjusting hole 50, the connecting ring 34 of the static contact shield 4 is provided with the screw connecting hole 51, the connecting screw is connected through the mounting adjusting hole 50 and the screw connecting hole 51, and the screw head of the connecting screw is covered inside the annular crimp cover body 43. The connecting structure of the dynamic contact shield 3 and the dynamic contact seat 2 is specifically that the mounting adjusting hole 50 is arranged on the connecting ring 34 of the dynamic contact shield 3, the mounting adjusting hole 50 is a counterbore, the dynamic contact seat 2 is provided with the screw connecting hole 51, the connecting screw is connected through the mounting adjusting hole 50 and the screw connecting hole 51, and the screw head is sunk in the mounting counterbore. In some embodiments, the mounting adjusting hole 50 is 10 mm, the fastening bolt is an M8 bolt, and there is a 2 mm adjusting range between the two, which can solve all the problems of the intermediate gap size by simply adjusting the connecting screw and the mounting adjusting hole 50. The adjustment is extremely convenient, which can speed up the assembly efficiency and improve the assembly quality, thereby effectively supporting the large-scale delivery of the power grid.

[0025] In other embodiments, a plurality of mounting through holes with a size larger than that of the screw rod of the threaded fastener can be arranged on the connecting ring 34 of the dynamic contact shield 3 and the static contact shield 4, a plurality of mounting through holes with a size larger than that of the screw rod of the threaded fastener can be arranged on the circumference of the dynamic contact seat 2 and the static contact seat 1, a connecting bolt is used as the threaded fastener, and then the dynamic contact shield 3 and the dynamic contact seat 2 and the static contact shield 4 and the static contact seat 1 are respectively fastened and connected by the connecting bolt.

[0026] The plurality of mounting adjusting holes 50 are uniformly arranged on the circumference of the connecting ring 34, and the corresponding screw connecting holes 51 are also uniformly arranged on the circumference. Of course, in other embodiments, the plurality of mounting threaded holes and the plurality of mounting threaded holes can also be unevenly arranged, and the plurality of mounting threaded holes and the plurality of mounting threaded holes can be respectively grouped and arranged on the connecting ring 34 surface and the dynamic contact seat 2 and the static contact seat 1 according to actual needs. In order to facilitate installation and adjustment, in a preferred embodiment, the number of mounting threaded holes and mounting adjusting holes 50 is three respectively.

[0027] The dynamic contact shield 3 and the static contact shield 4 are respectively adjustably mounted on the end of the dynamic contact seat 2 and the static contact seat 1 along the radial direction of the dynamic contact seat 2 and the static contact seat 1. In other embodiments, a circular ring boss can be arranged on the outer circumference of the dynamic and static contact seat 1, and the dynamic contact shield 3 and the static contact shield 4 are respectively adjustably mounted on the circular ring boss of the outer circumference of the dynamic and static contact seat 1 along the radial direction of the dynamic and static contact seat 1.

[0028] In other embodiments, according to the requirements of the electric field design of the moving contact and the static contact of the isolator, the moving contact shield 3 and the static contact shield 4 can also be in the form of a two-end open spherical shield body structure, one end of the spherical shield body has an end annular surface for connecting with the moving contact and the static contact 1, and the center of the end annular surface has a central perforation for passing the moving contact 7.

[0029] On the basis of the above embodiments, when the moving contact shield 3 and the static contact shield 4 are in an integrated structure, both are integrally formed by spinning a stainless steel sheet, when the connecting ring 34 is fixedly connected with the annular crimped shield body 43, the annular crimped shield body 43 is made of stainless steel, the arc ablation resistance is stronger, the ablation points are concentrated and not easy to diffuse, the risk of arc discharge to the ground is effectively reduced, and the product operation reliability is improved. Of course, in other embodiments, the moving contact and the static contact shield 4 can also be made of aluminum.

[0030] The isolator further comprises a cylindrical shell, the moving contact seat 2 and the static contact seat 1 are arranged on the axis of the inner cavity of the shell, the shell comprises a barrel bottom arranged on one side of the moving contact and the static contact 1, an insulating basin 9 is arranged on the bottom wall of the barrel bottom which is on the same axis as the moving contact and the static contact 1, and the moving contact and the static contact 1 are fixed on the insulating basin 9.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application, the patent protection scope of the present application is subject to the claims, any equivalent structural changes made according to the content of the specification and the drawings of the present application should also be included in the protection scope of the present application.

Claims

1. A GIS disconnector, characterized in that, The moving contact seat and the static contact seat are provided with thin shell-shaped moving contact shield and static contact shield coaxial with the moving contact seat and the static contact seat respectively, which are installed on the moving contact seat and the static contact seat along the radial direction of the moving contact seat and the static contact seat respectively.

2. The GIS disconnector according to claim 1, characterized in that The moving contact shield and the static contact shield respectively comprise a connecting ring coaxial with the moving contact seat and the static contact seat and a ring-shaped crimped cover body fixed on the connecting ring, and the moving contact shield and the static contact shield are connected to the moving contact seat and the static contact seat through the connecting ring respectively.

3. The GIS disconnector according to claim 2, characterized in that The inner edge of the ring-shaped crimped cover body is fixed on the end face of the connecting ring, the outer edge of the ring-shaped crimped cover body is folded and crimped back to the other shield, and the tail of the outer edge is inwardly crimped.

4. The GIS disconnector according to claim 2, characterized in that The connecting ring is installed on the moving contact seat and the static contact seat through connecting screws, the central through hole of the connecting ring is used for passing the moving contact when closing, one of the connecting ring and the corresponding contact seat is provided with a plurality of installation adjustment holes in the circumferential direction, the size of the installation adjustment hole is larger than the size of the screw rod of the connecting screw, and the other is provided with a plurality of screw connection holes matched with the connecting screw.

5. The GIS disconnector according to claim 4, characterized in that The installation adjustment hole is arranged on the static contact seat, the connecting ring of the static contact shield is provided with the screw connection hole, the connecting screw is connected through the installation adjustment hole and the screw connection hole, and the screw head of the connecting screw is covered inside the ring-shaped crimped cover body.

6. The GIS disconnector according to claim 4, characterized in that The installation adjustment hole is arranged on the connecting ring of the moving contact shield, and the installation adjustment hole is a counterbore, the static contact seat is provided with the screw connection hole, the connecting screw is connected through the installation adjustment hole and the screw connection hole, and the screw head is sunk in the installation counterbore.

7. The GIS disconnector according to claim 4 or 5 or 6, characterized in that The plurality of installation adjustment holes are uniformly arranged in the circumferential direction.

8. The GIS disconnector according to claim 4 or 5 or 6, characterized in that The number of the screw connection hole and the installation adjustment hole is three.

9. The GIS disconnector according to any of claims 1 to 6, characterized in that The moving contact shield and the static contact shield are respectively installed on the end of the moving contact seat and the static contact seat along the radial direction of the moving contact seat and the static contact seat.

10. The GIS disconnector according to claim 2, characterized in that The ring-shaped crimped cover body of the moving contact shield and the static contact shield is a stainless steel shield.

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