CN203433948U

CN203433948U - Centering device for different-aperture holes of transformer oil tank

Info

Publication number: CN203433948U
Application number: CN201320598405.0U
Authority: CN
Inventors: 秦建伟; 沈小治; 郭建霞; 谭明志; 陈胜云; 朱家富
Original assignee: Baoding Tianwei Group Co Ltd
Current assignee: Baoding Tianwei Group Co Ltd
Priority date: 2013-09-27
Filing date: 2013-09-27
Publication date: 2014-02-12
Anticipated expiration: 2023-09-27

Abstract

The utility model relates to a centering device for different-aperture holes of a transformer oil tank and belongs to the technical field of power transformers. The utility model adopts the following technical scheme: a pin cap (1), a pin rod A (2) and a pin rod B (4) take the shape of a cylinder; a pin transition section (3) and a pin head (5) take the shape of a cone; the pin cap (1), the pin rod A (2), the pin transition section (3), the pin rod B (4) and the pin head (5) are arranged sequentially in a descending order according to diameter, and are formed into a whole in a stepped manner; the diameter of the pin rod A (2) is matched with the hole of a transformer oil tank cover (6), and the length of the pin rod A (2) is matched with the thickness of the transformer oil tank cover (6); the diameter of the pin rod B (4) is matched with the hole of a transformer lower-section oil tank rim (7), and the length of the pin rod B (4) is matched with the thickness of the transformer lower-section oil tank rim (7). The centering device has the benefits as follows: alignment to the holes with different diameters of a transformer oil tank can be achieved through pins with different diameters and steps, the structure is simple, and the use is convenient.

Description

The not isometrical hole of a kind of oil tank of transformer centring means

Technical field

The utility model relates to the not isometrical hole of a kind of oil tank of transformer centring means, belongs to power transformer technical field.

Background technology

Oil tank of transformer especially bucket formula power transformer fuel tank overall dimension, weight is large, in lifting, transportation, easily there is small distortion, in the process of assembling, often a small amount of distortion because of tank wall causes the bolt hole of lower oil tank case edge and fuel tank cap of transformer to align.With reference to accompanying drawing 1, the pin that aligns general use conventional structure of lower oil tank case edge and fuel tank cap of transformer, this pin cannot meet the aligning requirements in lower oil tank case edge and fuel tank cap of transformer hole, because of diameter of bolt hole corresponding to lower oil tank case edge and fuel tank cap of transformer hole often different, take M16 bolt as example, and lower oil tank case is 19mm along bolt hole, and case lid is 22mm, conventional pin penetrates the unfitness of butt joint that upper and lower two holes have 3mm behind two holes, cannot realize not aligning of isometrical hole.

Utility model content

The utility model object is to provide the not isometrical hole of a kind of oil tank of transformer centring means, by having the pin of different-diameter with the level, realizes not aligning of isometrical hole of oil tank of transformer, solves the problem existing in background technology.

The technical solution of the utility model is:

The not isometrical hole of a kind of oil tank of transformer centring means, it is characterized in that: comprise lug cap, pin bar A, excessive section of pin, pin bar B and stem knob, lug cap, pin bar A and pin bar B are cylinder, the excessive section of pin and stem knob are cone, the descending lug cap that is followed successively by of diameter, pin bar A, excessive section of pin, pin bar B and stem knob, and stepped is integrally formed, the hole that pin bar A diameter and oil tank of transformer cover matches, length and fuel tank cap of transformer thickness match, pin bar B diameter and transformer lower oil tank case match along upper hole, length and transformer lower oil tank case match along thickness.

The length of described stem knob is less than transformer lower oil tank case along thickness.

The beneficial effects of the utility model are: by thering is the pin of different-diameter with the level, realize not aligning of isometrical hole of oil tank of transformer, and simple in structure, easy to use.

Accompanying drawing explanation

Fig. 1 is background technology front view;

Fig. 2 is the utility model front view;

Fig. 3 is the utility model end view;

Fig. 4 is that the utility model is used view;

In figure: lug cap 1, pin bar A2, the excessive section 3 of pin, pin bar B4, stem knob 5, fuel tank cap of transformer 6, transformer lower oil tank case are along 7.

Embodiment

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

With reference to accompanying

drawing

2, 3, 4, the not isometrical hole of a kind of oil tank of transformer centring means, comprise lug cap 1, pin bar A2, pin is section 3 excessively, pin bar B4 and stem knob 5, lug cap 1, pin bar A2 and pin bar B4 are cylinder, the excessive section 3 of pin and stem knob 5 are cone, the descending lug cap 1 that is followed successively by of diameter, pin bar A2, pin is section 3 excessively, pin bar B4 and stem knob 5, and stepped is integrally formed, diameter and thickness according to fuel tank cap of transformer 6 and transformer lower oil tank case along hole on 7, determine diameter and the length of each step, hole on pin bar A2 diameter and fuel tank cap of transformer 6 matches, length and fuel tank cap of transformer 6 thickness match, pin bar B4 diameter and transformer lower oil tank case match along the hole on 7, length and transformer lower oil tank case match along 7 thickness, the length of stem knob 5 is less than transformer lower oil tank case along 7 thickness.The not isometrical hole of oil tank of transformer centring means is penetrated from macropore part side, and parts with small hole side passes, and realizes not aligning of isometrical hole.

Claims

1. the not isometrical hole of an oil tank of transformer centring means, it is characterized in that: comprise lug cap (1), pin bar A(2), pin is section (3) excessively, pin bar B(4) and stem knob (5), lug cap (1), pin bar A(2) and pin bar B(4) be cylinder, the excessive section of pin (3) and stem knob (5) are cone, the descending lug cap (1) that is followed successively by of diameter, pin bar A(2), pin is section (3) excessively, pin bar B(4) and stem knob (5), and stepped is integrally formed, pin bar A(2) hole on diameter and fuel tank cap of transformer (6) matches, length and fuel tank cap of transformer (6) thickness matches, pin bar B(4) diameter and transformer lower oil tank case match along the hole on (7), length and transformer lower oil tank case match along (7) thickness.

2. the not isometrical hole of oil tank of transformer according to claim 1 centring means, is characterized in that: the length of described stem knob (5) is less than transformer lower oil tank case along (7) thickness.