CN203596315U

CN203596315U - Low-bounce and low contact resistance contact structure

Info

Publication number: CN203596315U
Application number: CN201320635031.5U
Authority: CN
Inventors: 彭琦柯; 何跃
Original assignee: CHINA ZHENHUA ELECTRONICS GROUP YUGUANG ELECTRICAL Co Ltd
Current assignee: CHINA ZHENHUA ELECTRONICS GROUP YUGUANG ELECTRICAL Co Ltd
Priority date: 2013-10-15
Filing date: 2013-10-15
Publication date: 2014-05-14
Anticipated expiration: 2023-10-15

Abstract

The utility model discloses a low-bounce and low contact resistance contact structure, comprising a contact. The contact is provided with a contact base. A ring of the contact base is provided with a reinforcing rib, and the reinforcing rib contacts with the contact. A conducting rod is sleeved in the reinforcing rib. A first gap is formed between a lower bottom surface of the conducting rod and an upper end face of the contact. A second gap is formed between a step surface of the conducting rod and an upper end face of the reinforcing rib. The structure is provided with the first gap and the second gap, and width of the first gap is smaller than width of the second gap. After a breaker applies switching-on pressure forces on the contact structure, the conducting rod contacts with the contact. When the contacts contact with each other and reactive forces among each other apply on the contacts, the reinforcing ribs and the contact bases move relative to each other, and the reinforcing ribs would not be clamped on the contact bases and would move in the reserved width of the second gap. The reactive forces are consumed in a moving process, so that bounce time of the whole contact becomes short, reducing switching-on bounce of the breaker.

Description

Low spring, low contact resistance structure of contact terminal

Technical field

The utility model relates to a kind of low spring, low contact resistance structure of contact terminal, belongs to vacuum interrupter technical field.

Background technology

The structure of contact terminal of the vacuum interrupter now using at present, conducting rod and contact base welding, the welding of reinforcement two ends, in structure of contact terminal opening and closing lock process, electric current all transmits to contact base by conducting rod, loop resistance is all larger, and in making process, structure of contact terminal easily produces rigidity spring, product spring is large, affects its break performance.

Summary of the invention

The purpose of this utility model is: a kind of low spring, low contact resistance structure of contact terminal are provided, solve the existing structure of contact terminal using at present, loop resistance is all larger, and in making process, structure of contact terminal easily produces rigidity spring, affects the problem of its break performance.

The technical solution of the utility model: a kind of low spring, low contact resistance structure of contact terminal, include contact, contact base is installed on contact, in contact seat ring, be placed with reinforcement, and reinforcement and contact, conducting rod is inserted in reinforcement, between conducting rod bottom surface and contact upper surface, forms the first gap, between conducting rod step surface and reinforcement upper surface, forms the second gap.

Above-mentioned low spring, low contact resistance structure of contact terminal, the width in described the first gap is equal to or less than the width in the second gap.

Above-mentioned low spring, low contact resistance structure of contact terminal, described reinforcement one end contacts with contact, and the other end is stuck on the step of contact base.

The beneficial effects of the utility model: compared with existing structure, the utility model is structurally provided with the first gap and the second gap, and the width in the first gap is equal to or less than the width in the second gap, reinforcement is one end and contact welding in installation process, and the other end is stuck on the step of contact base.This structure of contact terminal is subject to after the closing pressure effect of circuit breaker, conducting rod moves afterwards and contact in the first gap, meanwhile in the time being in contact with one another the reaction force being subject to each other between contact, between reinforcement and contact base, there will be relative motion, reinforcement is no longer stuck on contact base, can in the second gap, move.In whole motion process, can constantly consume reaction force, thereby the bounce time of whole contact is shortened, reduce circuit breaker closing rebound.In the time that the width in the first gap is less than the width in the second gap, conducting rod move downward with contact after, still there is certain gap surplus in the second gap, this gap surplus can make reinforcement continue to move in the second gap with respect to contact base, the allowing property of its structure is better, and the spring of total is less.And directly conducting rod is nested in contact base in the utility model, when making process, being subject to arc quenching system structural pressure, conducting rod directly contacts with contact, and electric current, by 2 the direct conducting of contact-making surface,, by contact base conducting, has not reduced loop resistance; In separating brake process, conducting rod separates with the contact-making surface of contact, and electric current flows to conducting rod by contact base, and the magnetic field producing by contact base coil reaches controls electric arc ability, meets the requirement of break performance.Use after this structure, 35KV product bounce time is dropped to below 3m/s by 4-6m/s, and contact resistance drops to 25 u by 30u.

Accompanying drawing explanation

Accompanying drawing 1 is structural representation of the present utility model;

Accompanying drawing 2 is existing structure of contact terminal schematic diagram;

Reference numeral: 1-contact, 2-contact base, 3-reinforcement, 4-conducting rod, 5-the first gap, 6-the second gap.

Embodiment

Embodiment of the present utility model: a kind of low spring, low contact resistance structure of contact terminal, as shown in Figure 1, include contact 1, contact base 2 is installed on contact 1, in contact base 2 ring, be placed with reinforcement 3, and reinforcement 3 lower surfaces and contact 1 upper surface weld together, conducting rod 4 is inserted in reinforcement 3, between conducting rod 4 lower surfaces and contact 1 upper surface, form the first gap 5, between conducting rod 4 step surfaces and reinforcement 3 upper surfaces, form the second gap 6.

In manufacturing process, the width in the first gap 5 should be equal to or less than the width in the second gap 6, in the time that equating, 2 width are subject in closing pressure mechanism, after conducting rod 4 contacts with contact 1, between reinforcement 3 and contact base 2, there is no certain buffering, its spring is slightly large, in order to make its spring change little, the width setting in the first gap 5 should be less than to the width in the second gap 6.In setting up procedure, the width in the first gap can not be greater than the width in the second gap, avoid in making process, and contact base 2 stress deformations, thus make total distortion.

Vacuum interrupter in use, when combined floodgate between moving contact and fixed contact because the effect of breaker closing pressure is in contact with one another, thereby the effect that is subject to interaction force in contact process makes can produce spring between contact.As shown in Figure 2, conducting rod and contact base weld existing structure of contact terminal, and reinforcement two ends are weldingly fixed on respectively on contact and contact base, and in interrupting process, the trend of electric current is all to be stayed to contact base by conducting rod, and its loop resistance is larger; And in making process, because the fixing welding of reinforcement makes between contact base and contact as rigidity contacts, contact is subject to again all reaction forces being passed to contact base after system reaction force, thereby make the spring of whole contact larger, and reaction force be difficult to eliminate, bounce time is long.

And the structure of contact terminal of the utility model improved, first when conducting rod 4 is subject to the effect of closing pressure of circuit breaker near contact 1, owing to forming the first gap 5 between the bottom surface of conducting rod 4 and the upper surface of contact 1, between the upper surface of the step surface of conducting rod 4 and reinforcement 3, form the second gap 6, and the width in the first gap 5 is equal to or less than the width in the second gap 6, conducting rod 4 moves down in process, conducting rod 4 bottom surfaces can directly not contact at once and between contact 1 upper surface, it can contact with contact 1 upper surface after a mobile segment distance in the first gap 5 again, now because contact 1 and reinforcement 3 are welded to connect, other one end of reinforcement 3 is just stuck on contact base 2, partial reaction power passes to reinforcement 3 by contact 1, reinforcement 3 is subject to reaction force to support contact base 2, now reinforcement 3 and contact base 2 relative motions, reinforcement 3 is no longer stuck on contact base 2, can move in the second gap 6, guarantee that vacuum interrupter is in making process, contact base 2 plays cushioning effect, its structure has certain allowing property, realize consumption arc control device combined floodgate energy, reduce circuit breaker closing rebound.In separating brake process, contact base 2 is subject to the restriction of reinforcement 3, thereby keeps whole system complete, indeformable.

In the time that the width in the first gap 5 is less than the width in the second gap 6, after conducting rod 4 moves downward and contacts with contact 1, still there is certain gap surplus in the second gap 6, this gap surplus can make reinforcement 3 continue to move in the second gap 6 with respect to contact base 2, the allowing property of its structure is better, and the spring of total is less.

When being subject to whole arc control device closing pressure, this structure of contact terminal does the used time, between conducting rod 4 bottom surfaces and contact 1 upper surface, contact, electric current is by the direct conducting of this contact-making surface,, by contact base 2 conductings, now loop resistance does not reduce, in separating brake process, between conducting rod 4 bottom surfaces and contact 1 upper surface, separate, electric current flows to conducting rod 4 by contact base 2, and the magnetic field producing by contact base 4 coils reaches controls electric arc ability, meets the requirement of break performance.

Claims

1. a low spring, low contact resistance structure of contact terminal, it is characterized in that: include contact (1), contact base (2) is installed on contact (1), in contact base (2) ring, be placed with reinforcement (3), and reinforcement (3) contacts with contact (1), conducting rod (4) is inserted in reinforcement (3), between conducting rod (4) bottom surface and contact (1) upper surface, forms the first gap (5), between conducting rod (4) step surface and reinforcement (3) upper surface, forms the second gap (6).

2. low spring according to claim 1, low contact resistance structure of contact terminal, is characterized in that: the width in described the first gap (5) is equal to or less than the width of the second gap (6).

3. low spring according to claim 1, low contact resistance structure of contact terminal, is characterized in that: described reinforcement (3) one end contacts with contact (1), and the other end is stuck on the step of contact base (2).