External support welding tool of shielding cylinder connecting nozzle and use method of external support welding tool

Abstract

The invention discloses an external support welding tool of a shielding cylinder connecting nozzle and a use method of the external support welding tool. According to the external support welding tool, the deformation produced due to external force influence in a connecting nozzle welding process can be effectively avoided, so that the welding accuracy is improved. One end of a shielding cylinder is provided with a bell mouth; the connecting nozzle is positioned on the inner side of the bell mouth; the external support welding tool comprises a flange and contraction and release screws; at least four threaded through holes are uniformly distributed at the periphery of the flange; the contraction and release screws are arranged in the threaded through holes; the internal diameter of the flange is greater than or equal to the maximum diameter of the bell mouth of the shielding cylinder; the height of the connecting nozzle is less than or equal to the difference of the external diameter of the body of the shielding cylinder and the internal diameter of the flange; and the connecting nozzle is provided with a threaded hole for connecting a contraction and release screw.

Description

technical field [0001] The invention relates to a shielding cylinder used for high-voltage test equipment, in particular to a device capable of ensuring the installation accuracy of the connecting nozzle of the shielding cylinder during the process of welding the connecting nozzle. Background technique [0002] The high-voltage test transformer is the basic test equipment used for AC withstand voltage test by power plants, power supply bureaus and scientific research units. Carry out the dielectric strength test under the specified voltage, assess the insulation level of the product, find the insulation defect of the tested product, and measure the ability of overvoltage. For the voltage test transformer, its main components include: (1) body: including core, winding, insulating parts and leads. ⑵Voltage regulating device: the tap changer, divided into non-excitation voltage regulation and on-load voltage regulation ⑶Oil tank and cooling device. ⑷Protection device: inc...

AI Technical Summary

Problems solved by technology

In order to ensure the compact structure of the high-voltage test equipment itself, we must control the size of the shielding tube during design. For the shielding tube, its structural characteristics are as follows: figure 1 As shown, the diameter of the sleeve is large, the wall is thin, and the design accuracy is high, which puts forward high requirements on the processing technology and design structure, and requires it to maintain the arc of the shielding tube during the processing process. However, due to the thin wall of the shielding tube itself, it is easy to cause deformation of the shielding tube, thus affecting its arc

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