CN2172917Y

CN2172917Y - Butterfly temp-sensitive connector

Info

Publication number: CN2172917Y
Application number: CN 93247001
Authority: CN
Inventors: 李江峰; 聂云生
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-12-03
Filing date: 1993-12-03
Publication date: 1994-07-27
Anticipated expiration: 2003-12-03

Abstract

The utility model relates to a butterfly temperature-sensitive connector for electric power devices, which is composed of two parts, an upper pressure plate and a lower pressure plate. The middle parts of the inner side planes of the upper and the lower pressure plates are respectively provided with a wire clamping groove for increasing the contact area with a bus cable. Both sides of the upper and the lower pressure plates are in m-shaped arc shape for eliminating point discharge phenomenon. The outer surfaces of the upper and the lower pressure plates are coated with invertible temperature displaying dope. The transition wiring contact and heating condition of the bus cable can be visually and rapidly reflected through the variance of the color of the dope. The pressure plates are fastened by bolts. The length to width ratio of the pressure plates is designed into 1: 0.618 for enriching aesthetic sense.

Description

Butterfly temp-sensitive connector

The utility model belongs to the universal accessories of power equipment high and low pressure terminal and bus cable transition wiring.

At present, the power equipment binding post ubiquity couple corrosion that China's power industry (particularly transformer industry) is continued to use is serious, the easy oxidation of terminal surfaces metal, contact resistance is bigger than normal and the easy defective such as heating of terminal, very easily causes equipment fault.With S ₇Series Power Transformer is an example, capacity below the 500KVA, the product of rated current below 300A, its high and low pressure side adopts the mode of bus cable and the direct wiring of terminal mostly.Like this, owing to reasons such as the wiring position is easily loosening, contact resistance is bigger than normal, the frequent heatings of terminal, easily cause transformer insulatedly wear out, temperature rise exceeds standard, the burned cracking of rubber seal, fuel tank seepage oil even transformer is blasted; Capacity then uses traditional rectangle joint at 500KVA and above transformer, the major defect of this joint is: contact and heating situation are difficult for observing, unreasonable structure, wedge angle position charge distribution density is concentrated relatively, execute under the high voltage outside, point discharge phenomenon easily takes place, and it is attractive in appearance that profile is owed, cost height (material is a brass).

The purpose of this utility model is to provide a kind of can intuitively reflect joint contact and heating situation, surface charge distribution uniform, contour structures low-cost joint attractive in appearance rationally.

The utility model is made of top board and lower platen two parts, pressing plate is selected electric conductivity preferred metal material for use, it is circular-arc that m shape is made in the both sides of upper and lower pressing plate, the shape of whole joint is butterfly, the wedge angle of joint surface has been eliminated in such design, it is even relatively to make that surface charge distributes, and avoids point discharge; Circle centre position at every section circular arc has bolt hole, is used for the fastening lower platen of going up; Coat the reversible thermocoating of strong adhesion, non-mutability at the easy heating position of joint, when conductor joint heating surpasses uniform temperature, the color of thermo-color can change thereupon, gets final product the interpretation temperature by standard color card, thereby reflects the contact and the heating situation of joint intuitively; Have wire casing on the upper and lower pressing plate, the bus strain relief clamp is in groove, and pressing plate can reduce contact resistance after clamping; The length-width ratio of pressing plate becomes 1:0.618 by " golden section " principle design, like this create an aesthetic feeling.

The utility model can intuitively reflect joint contact and heating situation by the thermo-color change in color, is convenient to the personnel of patrolling and examining and in time pinpoints the problems and take measures and safeguarded; Because the inner side plane of pressing plate has the clamp groove, has increased the contact area of pressing plate and bus cable, make between pressing plate and bus cable contact tightr, contact resistance is littler; It is circular-arc that the both sides of pressing plate are designed to m shape, makes CHARGE DISTRIBUTION even, eliminated point discharge phenomenon, prolongs joint useful life; The length-width ratio of pressing plate makes it create an aesthetic feeling by " golden section " principle design.

Fig. 1 is a vertical view of the present utility model.

Fig. 2 is an end view of the present utility model.

Fig. 3 is a top board schematic diagram of the present utility model.

Fig. 4 partly cuts open schematic diagram for lower platen of the present utility model.

Below in conjunction with a description of drawings embodiment of the present utility model: with electric conductivity preferably aluminium cast butterfly top board shown in Figure 3 and butterfly lower platen shown in Figure 4; The long L of upper and lower pressing plate is L:B=1:0.618 with the ratio of wide B; The boring of the circle centre position of circular arc as shown in Figure 1, plays the retaining effect with bolt 1 and nut 2(nut 2), 3 clamp bus cables 4; The

clamp groove

5,6 that respectively to dig a cross sectional shape at the middle part of upper and lower pressing plate inner side plane be arc, on the outer surface 8 of the outer surface 7 of top board and lower platen, coat 150 ℃ of reversible thermocoatings (code name W62) respectively, when the temperature of upper and lower pressing plate or bus cable surpassed 150 ℃, coating color can change; When temperature dropped to below 150 ℃, coating color can restore (can observe the coating color change procedure by standard color card) again, thereby judged the contact and the heating situation of joint.

Claims

1, a kind of power equipment joint, it is made of top board and lower platen two parts, it is characterized in that: the inner side plane middle part of upper and lower pressing plate respectively has a clamp groove, and outer surface scribbles thermo-color, and it is circular-arc that the both sides of upper and lower pressing plate are m shape.

2, joint according to claim 1 is characterized in that: the cross section of clamp groove is a circular arc.

3, joint according to claim 1 is characterized in that: the color of thermo-color can the variable color with the rising of connector temperature, reduces with temperature and restores.

4, joint according to claim 1 is characterized in that: the length-width ratio of pressing plate is 1:0.618.