Moving contact seat side expansion sleeve

Abstract

The utility model relates to a moving contact seat side expansion sleeve, comprising an epoxy resin casting body and a conductive assembly arranged in the epoxy resin casting body, the conductive assembly comprises a conductive copper bar arranged in the epoxy resin casting body and a conductive copper sheet arranged in the epoxy resin casting body and electrically connected with the conductive copper bar, one end of the epoxy resin casting body is provided with a side expansion plugging cavity, the epoxy resin casting body is provided with a plurality of copper inserts corresponding to the side expansion plugging cavity in an annular array, one end of the conductive copper rod is provided with a plugging part extending into the side expansion plugging cavity, and the other end of the epoxy resin casting body is provided with a contact insulation cover. And one end of the conductive copper sheet is provided with a contact sheet part extending into the contact insulating cover. The utility model has the advantages of simple structure, stable and reliable performance, low cost, high safety and good insulating property.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection gas cabinets, in particular to a side expansion sleeve of a moving contact seat on a side expansion environmental protection gas cabinet. Background Art

[0002] At present, the ring main unit is a group of electrical equipment for transmission and distribution, which is installed in a metal or non-metallic insulating cabinet or made into an assembled interval ring main unit. It usually uses sulfur hexafluoride gas, environmentally friendly gas, or epoxy resin as the insulating medium. In view of the rapidly developing power industry, it is a general trend to develop environmentally friendly gas insulated ring main units. The future power transmission and distribution equipment will inevitably continue to develop around the needs of safety, reliability, miniaturization, and environmental protection. Since the insulation performance of existing environmentally friendly gases such as nitrogen and dry air is much lower than that of SF6 gas, there are very high requirements for the insulation performance of environmentally friendly gas cabinets. The existing side expansion environmentally friendly gas cabinet needs to realize the connection of multiple environmentally friendly gas cabinets through the side expansion bushing. However, the side expansion bushing and the moving contact seat of the existing side expansion environmentally friendly gas cabinet adopt a split structure design, which is more complex and more expensive. In addition, the air creepage distance between the three phases is small, the phase-to-phase insulation performance is poor, and the safety is low. Summary of the invention

[0003] The utility model aims to overcome the defects of the prior art and provide a moving contact seat side expansion sleeve with simple structure, stable and reliable performance, low cost, high safety and good insulation performance.

[0004] To achieve the above-mentioned purpose, the utility model adopts a side expansion sleeve of a moving contact seat, including an epoxy resin casting body and a conductive component arranged in the epoxy resin casting body, the conductive component including a conductive copper rod arranged in the epoxy resin casting body, a conductive copper sheet arranged in the epoxy resin casting body and electrically connected to the conductive copper rod, one end of the epoxy resin casting body is provided with a side expansion plug-in cavity, a plurality of copper inlays are arranged in a circular array at the corresponding side expansion plug-in cavity on the epoxy resin casting body, one end of the conductive copper rod has a plug-in portion extending into the side expansion plug-in cavity, the other end of the epoxy resin casting body has a contact insulation cover, and one end of the conductive copper sheet has a contact portion extending into the contact insulation cover.

[0005] The beneficial effects of the above structure are: the side expansion sleeve of the moving contact seat adopts an epoxy resin cast integrated structure, which has a simpler structural design, lower cost and better insulation performance. The contact portion of the conductive copper sheet is arranged in the contact insulation cover, which has better insulation performance, thereby being able to meet the interphase insulation performance requirements of the environmental protection gas cabinet, and the plug-in portion at one end of the conductive copper rod is arranged in the side expansion plug-in cavity of the epoxy resin cast body, and the cabinets are connected in a plug-in manner, thereby being able to meet the requirements of rapid cabinet connection of the environmental protection gas cabinet, and a plurality of copper inserts are arranged on the epoxy resin cast body, which can ensure that the cabinet connection of multiple environmental protection gas cabinets is more firmly connected. Therefore, the side expansion sleeve of the moving contact seat has the advantages of simple structure, stable and reliable performance, low cost, high safety and good insulation performance.

[0006] In particular, a plurality of limiting convex rings are respectively arranged on the outer peripheral wall of the conductive copper rod, and the plurality of limiting convex rings are embedded in the epoxy resin casting body. The limiting convex rings can play a limiting role, which can ensure that the connection between the conductive copper rod and the epoxy resin casting body is more compact, thereby facilitating the working reliability of the expansion sleeve on the side of the moving contact seat.

[0007] In particular, two limiting studs are arranged on both sides of the conductive copper sheet corresponding to the contact sheet portion, and the limiting studs are embedded in the contact insulation cover. The limiting studs can play a limiting role, thereby ensuring that the connection between the conductive copper sheet and the contact insulation cover is more compact and firm, which is conducive to improving the working reliability of the expansion sleeve on the side of the movable contact seat.

[0008] In particular, one end of the conductive copper rod has a connecting portion, and the connecting portion is welded in a through hole at the other end of the conductive copper sheet. The conductive copper rod and the conductive copper sheet are connected to form an integrated structure by welding, thereby facilitating the assembly of the expansion sleeve on the side of the moving contact seat and achieving higher assembly efficiency.

[0009] In particular, the contact insulation cover is provided with an insulating protrusion separating the connection part and the contact piece part. The insulating protrusion can increase the air insulation distance between the connection part and the contact piece part, thereby facilitating improving the insulation performance of the expansion sleeve on the side of the moving contact seat.

[0010] In particular, a plurality of insulating convex strips are arranged at intervals below the contact piece portion in the contact insulating cover. The insulating convex strips can increase the air insulation distance of the contact piece portion, which is beneficial to improving the insulation performance of the expansion sleeve on the side of the moving contact seat.

[0011] In particular, reinforcing ribs are arranged between the epoxy resin casting body and the contact insulation cover, and the reinforcing ribs can enhance the overall strength of the expansion sleeve on the side of the moving contact seat, thereby achieving better strength and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a stereoscopic diagram of an embodiment of the utility model from a first viewing angle.

[0013] Figure 2 This is a stereoscopic diagram from a second viewing angle of an embodiment of the utility model.

[0014] Figure 3 This is a cross-sectional view of an embodiment of the utility model. DETAILED DESCRIPTION

[0015] like Figures 1 to 3 As shown, an embodiment of the utility model is a side expansion sleeve of a moving contact seat, comprising an epoxy resin casting body 10, and a conductive component 20 arranged in the epoxy resin casting body 10, wherein the conductive component 20 comprises a conductive copper rod 21 arranged in the epoxy resin casting body 10, and a conductive copper sheet 22 arranged in the epoxy resin casting body 10 and electrically connected to the conductive copper rod 21, wherein one end of the epoxy resin casting body 10 is provided with a side expansion plug-in cavity 11, and a plurality of copper inserts 12 are arranged in a ring array at a location corresponding to the side expansion plug-in cavity 11 on the epoxy resin casting body 10, wherein one end of the conductive copper rod 21 has a plug-in portion 211 extending into the side expansion plug-in cavity 11, and the other end of the epoxy resin casting body 10 has a contact insulation cover 13, and one end of the conductive copper sheet 22 has a contact piece portion 221 extending into the contact insulation cover 13. A plurality of limiting protrusions 212 are respectively arranged on the outer peripheral wall of the conductive copper rod 21, and the plurality of limiting protrusions 212 are embedded in the epoxy resin casting body 10. The limiting protrusions can play a limiting role, which can ensure that the connection between the conductive copper rod and the epoxy resin casting body is more compact, thereby facilitating the improvement of the working reliability of the expansion sleeve on the side of the movable contact seat. Two limiting studs 23 are arranged on the conductive copper sheet 22 at both sides corresponding to the contact sheet portion 221, and the limiting studs 23 are embedded in the contact insulation cover 13. The limiting studs can play a limiting role, thereby ensuring that the connection between the conductive copper sheet and the contact insulation cover is more compact and firm, thereby facilitating the improvement of the working reliability of the expansion sleeve on the side of the movable contact seat.

[0016] like Figure 1 and 3As shown, one end of the conductive copper rod 21 has a connecting portion 213, and the connecting portion 213 is welded in the through hole 222 at the other end of the conductive copper sheet 22. The conductive copper rod and the conductive copper sheet are connected as an integrated structure by welding, so as to facilitate the assembly of the expansion sleeve on the side of the moving contact seat, and the assembly efficiency is higher. The contact insulation cover 13 is provided with an insulating protrusion 131 separated between the connecting portion 213 and the contact piece portion 221. The insulating protrusion can increase the air insulation distance between the connecting portion and the contact piece portion, thereby facilitating the improvement of the insulation performance of the expansion sleeve on the side of the moving contact seat. A plurality of insulating convex strips 132 are arranged at intervals below the corresponding contact piece portion 221 in the contact insulation cover 13. The insulating convex strips can increase the air insulation distance of the contact piece portion, which is conducive to improving the insulation performance of the expansion sleeve on the side of the moving contact seat. A reinforcing rib 14 is provided between the epoxy resin casting body 10 and the contact insulation cover 13. The reinforcing ribs can enhance the overall strength of the expansion sleeve on the side of the moving contact seat, thereby achieving better strength and longer service life.

[0017] The side expansion sleeve of the moving contact seat adopts an epoxy resin cast integrated structure, which has a simpler structural design, lower cost and better insulation performance. The contact portion of the conductive copper sheet is arranged in the contact insulation cover, which has better insulation performance, thereby being able to meet the interphase insulation performance requirements of the environmental protection gas cabinet, and the plug-in portion at one end of the conductive copper rod is arranged in the side expansion plug-in cavity of the epoxy resin cast body, and the plug-in method is adopted to connect the cabinets, thereby being able to meet the rapid connection requirements of the environmental protection gas cabinet, and a plurality of copper inserts are arranged on the epoxy resin cast body, which can ensure that the connection of multiple environmental protection gas cabinets is more secure. Therefore, the side expansion sleeve of the moving contact seat has the advantages of simple structure, stable and reliable performance, low cost, high safety and good insulation performance.

Claims

1. A side expansion sleeve for a moving contact seat, characterized in that: It includes an epoxy resin casting body and a conductive component arranged in the epoxy resin casting body. The conductive component includes a conductive copper rod arranged in the epoxy resin casting body and a conductive copper sheet arranged in the epoxy resin casting body and electrically connected to the conductive copper rod. A side expansion plug-in cavity is arranged at one end of the epoxy resin casting body. A plurality of copper inlays are arranged in a ring array at the corresponding side expansion plug-in cavity on the epoxy resin casting body. One end of the conductive copper rod has a plug-in portion extending into the side expansion plug-in cavity. The other end of the epoxy resin casting body has a contact insulation cover. One end of the conductive copper sheet has a contact portion extending into the contact insulation cover.

2. The moving contact seat side expansion sleeve according to claim 1, characterized in that: A plurality of limiting convex rings are respectively arranged on the outer peripheral wall of the conductive copper rod, and the plurality of limiting convex rings are embedded in the epoxy resin casting body.

3. The moving contact seat side expansion sleeve according to claim 1 or 2, characterized in that: Two limiting studs are arranged on the conductive copper sheet at the two sides corresponding to the contact sheet portion, and the limiting studs are embedded in the contact insulation cover.

4. The moving contact seat side expansion sleeve according to claim 1 or 2, characterized in that: One end of the conductive copper rod is provided with a connecting portion, and the connecting portion is welded in a through hole at the other end of the conductive copper sheet.

5. The moving contact seat side expansion sleeve according to claim 4, characterized in that: The contact insulation cover is provided with an insulation protrusion separated between the connection part and the contact piece part.

6. The moving contact seat side expansion sleeve according to claim 1 or 2, characterized in that: A plurality of insulating convex strips are arranged at intervals below the contact piece portion in the contact insulating cover.

7. The moving contact seat side expansion sleeve according to claim 1 or 2, characterized in that: Reinforcing ribs are arranged between the epoxy resin casting body and the contact insulation cover.

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