CN212365844U

CN212365844U - Better vacuum interrupter contact of insulating nature

Info

Publication number: CN212365844U
Application number: CN202021319737.7U
Authority: CN
Inventors: 吴或龙
Original assignee: Xiamen Sen Light Electric Technology Co ltd
Current assignee: Xiamen Sen Light Electric Technology Co ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-01-15
Anticipated expiration: 2030-07-08

Abstract

The utility model discloses a better vacuum interrupter contact of insulating nature, this contact include discoid contact body, contact body's thickness is 5.5mm, contact body 1's external diameter is 40mm contact body axis department is equipped with the conducting rod through-hole of through-hole form still the correspondence is equipped with the logical groove that a plurality of is central symmetry on the contact body, it runs through to the lower extreme to lead to the groove from contact body's upper end. The utility model relates to a better vacuum interrupter contact of insulating nature carries out optimal design through the size structure to each part for the contact also changes in the magnetic field order of discharging under high voltage, under the condition of thunder and lightning impulse voltage 85KV to 125KV, the discharge coefficient of this application contact also becomes different, thereby influences the insulating properties of product, makes this application obtain better insulating properties in thunderbolt test and practical application.

Description

Better vacuum interrupter contact of insulating nature

Technical Field

The utility model belongs to the technical field of electric power equipment and specifically relates to a better vacuum interrupter contact of insulating nature.

Background

A vacuum arc-extinguishing chamber, also known as a vacuum switch tube, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical engineering, railways, broadcasting, communication, industrial high-frequency heating and the like. The device has the characteristics of energy conservation, material conservation, fire prevention, explosion prevention, small volume, long service life, low maintenance cost, reliable operation, no pollution and the like. The vacuum arc-extinguishing chamber is divided into an arc-extinguishing chamber for a circuit breaker and an arc-extinguishing chamber for a load switch from the aspect of use, the arc-extinguishing chamber for the circuit breaker is mainly used for transformer substations and power grid facilities in the power sector, and the arc-extinguishing chamber for the load switch is mainly used for end users of a power grid.

The size and the structure of the contacts of the vacuum arc extinguish chamber are different, the discharge magnetic field under high voltage is changed smoothly, and the size and the structure of the contacts are different, and the discharge coefficients are also changed differently under the condition of lightning impulse voltage of 85KV to 125KV, so that the insulation performance of the product is influenced. Therefore, a vacuum interrupter contact with good insulation is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, a vacuum arc-extinguishing chamber contact with better insulation is provided.

The utility model discloses a following scheme realizes:

the utility model provides a better vacuum interrupter contact of insulating nature, this contact include discoid contact body, contact body's thickness is 5.5mm, contact body 1's external diameter is 40mm contact body axis department is equipped with the conducting rod through-hole of through-hole form still the correspondence is equipped with a plurality of and is centrosymmetric logical groove on the contact body, it runs through to the lower extreme to lead to the groove from contact body's upper end.

The conducting rod through hole comprises a through hole body, a first expansion ring is correspondingly arranged at the upper end of the through hole body, a second expansion ring is correspondingly arranged at the upper end of the first expansion ring, and the joints of the second expansion ring, the first expansion ring and the through hole body respectively and correspondingly form a step-shaped structure.

The lower end of the through hole body is flush with the lower end of the contact body, and a taper chamfer is correspondingly arranged at the connection part of the lower end of the through hole body and the lower end of the contact body;

the upper end of the second expansion ring is flush with the upper end of the contact body correspondingly, and a fillet with the radius of 0.5mm is further arranged at the joint of the upper end of the second expansion ring and the upper end of the contact body correspondingly.

The internal diameter of through-hole body is 5mm, the internal diameter of first expansion ring is 6mm, the internal diameter of second expansion ring is 8 mm.

Six evenly distributed through grooves are formed, the width of each through groove is 1.5mm, and the length of each through groove is 13 mm.

The through groove comprises an internal head arranged in the contact body and an external head correspondingly communicated with the outer wall of the contact body, and the included angle between the central axis of the through groove and the tangent line of the corresponding external head is 60 degrees.

The joint of the built-in head and the contact body is in a semicircular shape with the radius of 0.75 mm.

The utility model has the advantages that:

the utility model relates to a better vacuum interrupter contact of insulating nature carries out optimal design through the size structure to each part for the contact also changes in the magnetic field order of discharging under high voltage, under the condition of thunder and lightning impulse voltage 85KV to 125KV, the discharge coefficient of this application contact also becomes different, thereby influences the insulating properties of product, makes this application obtain better insulating properties in thunderbolt test and practical application.

Drawings

Fig. 1 is a schematic top view of a vacuum interrupter contact with good insulation performance according to the present invention;

fig. 2 is a schematic cross-sectional structural view of a vacuum interrupter contact with good insulation performance according to the present invention;

in the figure: the contact comprises a contact body 1, a conductive rod through hole 2, a through hole body 21, a first expansion ring 22, a second expansion ring 23, a chamfer 24, a fillet 25, a through groove 3, an internal head 31 and an external head 32.

Detailed Description

The preferred embodiments of the present invention will be further described with reference to the accompanying drawings in which:

the utility model provides a better vacuum interrupter contact of insulating nature, this contact include discoid contact body 1, contact body 1's thickness is 5.5mm, contact body 1's external diameter is 40mm contact body 1 axis department is equipped with the conducting rod through-hole 2 of through-hole form contact body 1 is last still to correspond and to be equipped with a plurality of and be centrosymmetric logical groove 3, it runs through to the lower extreme to lead to groove 3 from contact body 1's upper end.

The vacuum arc-extinguishing chamber contact with better insulation property can improve the breaking capacity of the vacuum arc-extinguishing chamber, and the contact volume can be reduced by the same voltage and current grade, so that the whole vacuum arc-extinguishing chamber is miniaturized, and the miniaturized vacuum arc-extinguishing chamber is small in volume, light in weight, low in manufacturing cost and good in economic benefit.

The conducting rod through hole 2 comprises a through hole body 21, a first expansion ring 22 is correspondingly arranged at the upper end of the through hole body 21, a second expansion ring 23 is correspondingly arranged at the upper end of the first expansion ring 22, and the joints of the second expansion ring 23, the first expansion ring 22 and the through hole body 21 respectively and correspondingly form a step-shaped structure. The joint of the built-in head 31 and the contact body 1 is a semicircle with the radius of 0.75 mm. This application is rational in infrastructure, and the size of each part satisfies insulating and structural strength's requirement through comprehensive optimal design, has promoted product quality, has reduced manufacturing cost.

The lower end of the through hole body 21 is flush with the lower end of the contact body 1, and a 45-degree chamfer 24 is correspondingly arranged at the joint of the lower end of the through hole body 21 and the lower end of the contact body 1; the upper end of the second expansion ring 23 is flush with the upper end of the contact body 1, and a fillet 25 with the radius of 0.5mm is correspondingly arranged at the joint of the upper end of the second expansion ring 23 and the upper end of the contact body 1. The setting of fillet and chamfer can reduce the burr, improves product insulating properties.

The internal diameter of through-hole body 21 is 5mm, the internal diameter of first expansion ring 22 is 6mm, the internal diameter of second expansion ring 23 is 8 mm. The through grooves 3 are six uniformly distributed, the width of each through groove 3 is 1.5mm, and the length of each through groove 3 is 13 mm. The through groove 3 comprises an internal head 31 arranged inside the contact body 1 and an external head 32 correspondingly communicated with the outer wall of the contact body 1, and an included angle between the central axis of the through groove 3 and the tangent line of the corresponding external head 32 is 60 degrees.

This application is provided with above-mentioned special angle's logical groove, can reduce the vortex, and six have been seted up to logical groove to be the blade shape and arrange, not only it is better to reduce the vortex effect, and processing is convenient moreover, practices thrift manufacturing cost.

Although the invention has been shown and described in detail with respect to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a better vacuum interrupter contact of insulating nature which characterized in that: this contact includes discoid contact body (1), the thickness of contact body (1) is 5.5mm, the external diameter of contact body (1) is 40mm contact body (1) axis department is equipped with conducting rod through-hole (2) of through-hole form still correspond on contact body (1) and be equipped with a plurality of and be logical groove (3) of central symmetry, it runs through to the lower extreme to lead to groove (3) from the upper end of contact body (1).

2. The contact of the vacuum arc-extinguishing chamber with better insulation property according to claim 1, is characterized in that: the conducting rod through hole (2) comprises a through hole body (21), a first expansion ring (22) is correspondingly arranged at the upper end of the through hole body (21), a second expansion ring (23) is correspondingly arranged at the upper end of the first expansion ring (22), and the joints of the second expansion ring (23), the first expansion ring (22) and the through hole body (21) respectively correspond to form a step-shaped structure.

3. The contact of the vacuum arc-extinguishing chamber with better insulation property according to claim 2, is characterized in that: the lower end of the through hole body (21) is flush with the lower end of the contact body (1), and a 45-degree chamfer (24) is correspondingly arranged at the joint of the lower end of the through hole body (21) and the lower end of the contact body (1);

the upper end of the second expansion ring (23) is flush with the upper end of the contact body (1), and a fillet (25) with the radius of 0.5mm is correspondingly arranged at the joint of the upper end of the second expansion ring (23) and the upper end of the contact body (1).

4. The contact of the vacuum arc-extinguishing chamber with better insulation property according to claim 2, is characterized in that: the internal diameter of through-hole body (21) is 5mm, the internal diameter of first expansion ring (22) is 6mm, the internal diameter of second expansion ring (23) is 8 mm.

5. The contact of the vacuum arc-extinguishing chamber with better insulation property according to claim 1, is characterized in that: the through grooves (3) are uniformly distributed, the width of each through groove (3) is 1.5mm, and the length of each through groove (3) is 13 mm.

6. The contact of the vacuum arc-extinguishing chamber with better insulation property according to claim 5, is characterized in that: the through groove (3) comprises an internal head (31) arranged inside the contact body (1) and an external head (32) correspondingly communicated with the outer wall of the contact body (1), and the included angle between the central axis of the through groove (3) and the tangent line of the corresponding external head (32) is 60 degrees.

7. The contact of claim 6, wherein the contact comprises: the joint of the built-in head (31) and the contact body (1) is in a semicircular shape with the radius of 0.75 mm.