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Pre-tightening device

A transformer bushing and pressure plate technology, which is applied in the field of transformers and can solve the problems of heavy installation workload of transformer bushings

Active Publication Date: 2016-03-16
JIANGSU SHENMA ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a pretensioning device that can reduce the workload in view of the problem of heavy installation workload of the existing transformer bushings

Method used

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] see figure 1 , the pretensioning device according to one embodiment of the present invention can be used for transformer bushing installation. The transformer bushing generally includes a pressure plate 240 for compressing the tension spring, and an oil conservator 210 surrounding the pressure plate 240 .

[0024] The pre-tightening device includes a fixing frame 110 , a hydraulic mechanism 120 , and a pressing mechanism 130 . The fixed frame 110 is supported on the oil conservator 210 , the hydraulic mechanism 120 is carried on the fixed frame 110 , the pressure applying mechanism 130 is connected with the hydraulic m...

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Abstract

The invention relates to a pre-tightening device used for installing a transformer bushing. The pre-tightening device comprises a fixed mount, a hydraulic mechanism and a pressure application mechanism, wherein the fixed mount is fixed on a conservator; the hydraulic mechanism is borne on the fixed mount; the pressure application mechanism is used for applying pressure to a platen and is connected with the hydraulic mechanism; and the hydraulic mechanism drives the pressure application mechanism to move towards the conservator. The pre-tightening device can quickly press the platen of the transformer bushing, assembles a compression nut onto a conduction cylinder when required pre-tightening force is achieved, the platen is limited, and then, the pre-tightening device is removed to finish installing the transformer bushing. Therefore, one circle of bolts does not need to be screwed by a great quantity of manual work, workload is effectively lowered, and manual work man hour is shortened so as to reduce product cost.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a pretensioning device used for installing transformer bushings. Background technique [0002] When installing traditional transformer bushings, the pressure plate is generally pre-tightened by a hydraulic mechanism, pre-locked by a circle of bolts on the periphery of the pressure plate, and then the conductive column is installed, and the compression nut in the center is locked and tightened by a wrench. The nuts are locked, and then the bolts used for preloading are removed to complete the assembly of the entire transformer bushing. However, in the operation of the traditional method, the locking and dismounting of the bolts need to be repeated manually, resulting in a large workload, increasing the man-hours, and thus increasing the cost of the product. Contents of the invention [0003] Based on this, it is necessary to provide a pretensioning device that can reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/00H01F27/32B23P19/00
CPCB23P19/00H01F27/325H01F41/00
Inventor 马斌方江朱兴祥王永跃仲留寄
Owner JIANGSU SHENMA ELECTRIC CO LTD
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