CN201853872U - A conductive rod with an intermediate shield - Google Patents

Abstract

The utility model relates to an intershield conducting rod which comprises a conducting rod, wherein the set position of the conducting rod is coaxially sheathed with a shielding barrel, a flange is fixedly connected at the lower end of the shielding barrel through a section of insulated transition barrel, the flange is coaxially, vertically and fixedly welded on the conducting rod, and the upper end and the lower end of the insulated transition barrel are respectively and fixedly connected with the shielding barrel and the flange. In the scheme of the utility model, the length of the insulated transition barrel is very short, so the material is saved, the weight can be lightened, and the installation is very convenient; as the flange is fixedly welded on the conducting rod, when in installing, the conducting rod is free from being hoisted, only verticality of the flange and the conducting rod needs to be ensured, and then the coaxiality can be basically ensured.

Description

A conductive rod with an intermediate shield

technical field

The utility model relates to the technical field of high-voltage electrical equipment, in particular to a conductive rod with an intermediate shield.

Background technique

Composite bushings are mainly used for the lead-out of the incoming and outgoing lines of outdoor high-voltage power transmission and transformation equipment, or the connection between high-voltage power transmission and transformation equipment and overhead lines, to conduct the circuit, and to realize the transition of the conductive circuit between the gas-insulated medium and the air-insulated medium. The conductive rod with intermediate shielding in the composite casing is shown in Figure 1. The central conductive rod 1 is provided with intermediate shielding to form a conductive rod with intermediate shielding. The conductive rod 1 is vertically fixed on the base 2, and the intermediate shield Coaxial with the conductive rod, including the upper shielding cylinder 3 and the lower insulating cylinder 4 (made of epoxy glass cloth pipe), the shielding cylinder 3 and the insulating cylinder 4 are cylinders with the same axis and the same radius, and the joints are glued and insulated The lower part of the tube 4 has a borehole, which is fixed on the base 2 by bolts.

The bonding process of the insulating cylinder 4 and the shielding cylinder 3 is time-consuming and laborious, and difficult to control. During assembly, it is necessary to lift the conductive rod 1, fix the conductive rod 1, then lift the intermediate shielding device, and put it through the conductive rod 1 before fixing it. The intermediate shielding device is very heavy, and the whole process needs to be hoisted twice, which is inconvenient for assembly; because the shielding cylinder 3 and the insulating cylinder 4 are both very high, when the insulating cylinder 4 is fixed, a small deviation will make it difficult for the shielding cylinder 3 and the conductive rod 1 to be coaxial , coupled with the process of bonding, it is even more difficult to control the coaxiality.

Utility model content

The purpose of the utility model is to provide a conductive rod with an intermediate shield to solve the problems of inconvenient installation and difficult control of the coaxiality of the intermediate shield of the conductive rod in the prior art.

In order to achieve the above purpose, the solution of the utility model is: a conductive rod with an intermediate shield, including a conductive rod, a shielding tube is coaxially sleeved at the set position of the conductive rod, and the lower end of the shielding tube is fixed by a section of insulating transition tube A flange is connected, and the flange is coaxially and vertically fixedly welded on the conductive rod, and the upper and lower ends of the insulating transition tube are respectively fixedly connected with the shielding tube and the flange. the

With the scheme of the utility model, the length of the insulating transition cylinder is very short, which not only saves materials, but also reduces the weight, making the installation very convenient; since the flange is fixedly welded on the conductive rod, it can be installed without lifting the conductive rod, and As long as the perpendicularity between the flange and the conductive rod is ensured, the coaxiality can be basically guaranteed.

Further, the upper and lower ends of the insulating transition cylinder are respectively connected to the shielding cylinder and the flange through axial bolts. The distance between the lower surface of the upper screw of the insulating transition barrel and the upper surface of the lower screw is greater than the radial distance between the shielding barrel and the conductive rod. The insulating transition cylinder is in the shape of an inverted cone, the large end is connected to the shielding cylinder, and the small end is connected to the flange. Bolt connection is used to make installation more convenient. At the same time, attention should be paid to the length of the insulating transition tube being greater than the creepage distance.

Description of drawings

Fig. 1 is the structural diagram of the conductive rod with intermediate shielding in the prior art;

Fig. 2 is a structural diagram of the utility model with a conductive rod with an intermediate shield.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 2, a conductive rod with intermediate shielding includes a conductive rod 1, a shielding cylinder 3 is coaxially sleeved at the set position of the conductive rod 1, and the lower end of the shielding cylinder 3 is fixedly connected by an insulating transition cylinder 5 A flange 6, the flange 6 is coaxially and vertically fixedly welded on the conductive rod 1, and the upper and lower ends of the insulating transition cylinder 5 are respectively connected with the shielding cylinder 3 and the flange 6 with axial bolts. The insulating transition cylinder 5 is in an inverted cone shape, the large end is connected to the shielding cylinder 3 , and the small end is connected to the flange 6 . Both the shielding cylinder 3 and the flange 6 are made of aluminum, and the insulating transition cylinder 5 is poured with epoxy resin. Considering the creepage distance, when selecting the length of the insulating transition cylinder 5, the distance between the lower surface of the upper screw of the insulating transition cylinder 5 and the upper surface of the lower screw should be greater than the radial distance between the shielding cylinder 3 and the conductive rod 6 .

When assembling, first fix the lower end of the shielding tube 3 and the large end of the insulating transition tube 5, then put it through the conductive rod 1, and fix the small end of the insulating transition tube 5 on the welding flange 6 of the conductive rod 1 (no need to stand up for this process). After the assembly is completed, lift the part as a whole and fix it on the plane of the base 2. Due to the removal of the original insulating cylinder made of epoxy glass cloth tubes and the cancellation of the bonding link, the cost is effectively reduced, the height and weight of the intermediate potential shield are also greatly reduced, and the entire assembly process only needs to be hoisted once. Since the conductive rod 1 will be inserted into the electrical connection of the insulating basin through self-tracking, the conductive rod 1 must be at the axis. As long as the conductive rod 1 and the welded flange 6 ensure good verticality, the intermediate potential shield basically does not need to be adjusted, and the coaxiality can be guaranteed.

Claims (4)

1. A conductive rod with an intermediate shield, including a conductive rod, and a shielding tube is coaxially sleeved at the set position of the conductive rod, and it is characterized in that the lower end of the shielding tube is fixedly connected to a flange through a section of insulating transition tube, the The flange is coaxially and vertically fixedly welded on the conductive rod, and the upper and lower ends of the insulating transition tube are respectively fixedly connected to the shielding tube and the flange. 2 . The conductive rod with intermediate shielding according to claim 1 , wherein the upper and lower ends of the insulating transition cylinder are respectively connected to the shielding cylinder and the flange through axial bolts. 3 . 3. A conductive rod with an intermediate shield according to claim 2, wherein the distance between the lower surface of the upper screw of the insulating transition cylinder and the upper surface of the lower screw is greater than the distance between the shielding cylinder and the conductive rod. Radial distance between rods. 4. A conductive rod with an intermediate shield according to claim 1, 2 or 3, wherein the insulating transition cylinder is in an inverted cone shape, the large end is connected to the shielding cylinder, and the small end is connected to the shielding cylinder. The flanges are connected.

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