CN216120160U

CN216120160U - Rotary moving contact device

Info

Publication number: CN216120160U
Application number: CN202122255809.7U
Authority: CN
Inventors: 陈贤卓; 王志勇; 叶楠; 马成连; 王丽
Original assignee: Fato Mechanical And Electrical Co ltd
Current assignee: Fato Mechanical And Electrical Co ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2022-03-22
Anticipated expiration: 2031-09-16

Abstract

A rotary moving contact device belongs to the technical field of circuit breakers and comprises a rotating shaft, a spring shaft and a moving contact, wherein two spring shaft accommodating cavities and two spring accommodating cavities are arranged in the rotating shaft, the spring shaft is arranged in each spring accommodating cavity, a special-shaped spring is arranged in each spring accommodating cavity, the special-shaped spring is two tension springs which are arranged in parallel at a certain interval, one end of each tension spring is connected with the other end of each spring, the moving contact is arranged in the interval between the two tension springs of the special-shaped spring, two side faces of the moving contact are attached to the tension springs, two end arms opposite in direction are obliquely and symmetrically arranged on the moving contact, a first groove and a second groove are arranged at the starting position of each end arm, and the first groove and the second groove can be elastically fixed with a connecting part of the special-shaped spring Reasonable, easy to manufacture and easy to assemble.

Description

Rotary moving contact device

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a rotary moving contact device.

Background

The moulded case circuit breaker is opened and closed mainly by means of the separation and closing between the moving contact and the static contact, and when the moulded case circuit breaker is normally used, a certain pressure is required to be ensured between the moving contact and the static contact, so that the contact resistance between the moving contact and the static contact is reduced, and the temperature rise of the moulded case circuit breaker meets the use requirement. With the continuous development of power grids, the requirement on the short-circuit breaking capacity of the circuit breaker is higher and higher. At present, a rotary double-breakpoint moving contact system of a molded case circuit breaker is one of the developing directions, and the existing double-breakpoint contact device has the defects of multiple parts, complex structure and difficulty in assembly.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a rotary moving contact device with simple structure

The technical scheme adopted by the utility model is as follows: the utility model provides a rotatory moving contact device, includes the pivot, spring shaft and moving contact, be equipped with two spring shaft in the pivot and hold the chamber with two springs and hold the chamber, the spring shaft holds the intracavity and sets up the spring shaft, the spring holds the intracavity and sets up special-shaped spring, special-shaped spring is two extension springs that are separated by certain interval parallel arrangement and has one end to link together, and its other end is fixed with the spring shaft, set up the moving contact in the interval of two extension springs of special-shaped spring, moving contact both sides face and extension spring laminating, moving contact slant symmetry is equipped with two opposite end arms of orientation, the initial department of end arm is equipped with first recess and second recess, first recess and second recess all can form elastic fixation with special-shaped spring connecting portion.

Two connecting through holes are symmetrically arranged on the end face of the rotating shaft.

The end face of the rotating shaft is provided with a cylindrical bulge.

And silver contacts with opposite directions are arranged at the tail ends of the moving contact end arms.

The rotary moving contact device is arranged in a breaking unit of the molded case circuit breaker.

The breaking unit is internally provided with a shell, and a clamping groove for embedding the rotary moving contact device is formed in the shell.

And a first arc extinguish chamber and a second arc extinguish chamber are arranged on two sides of the rotary contact device in the breaking unit, and a static contact matched with the first arc extinguish chamber and the second arc extinguish chamber is also arranged.

The fixed contacts are divided into long fixed contacts and short fixed contacts, the long fixed contacts are arranged in the first arc extinguish chamber, and the short fixed contacts are arranged in the second arc extinguish chamber.

All be equipped with arc extinguishing bars group in first explosion chamber and the second explosion chamber, arc extinguishing bars group comprises the arc extinguishing bars piece that several parallel arrangement and the setting are used for fixed arc extinguishing bars piece at both ends flash barrier.

The rotary moving contact device is arranged in the molded case circuit breaker.

The utility model has the following beneficial effects: the utility model uses the special-shaped spring to elastically limit and fix the moving contact, and compared with the prior art, the utility model eliminates redundant parts such as a fixed shaft, a fixed sheet and the like, and ensures that the device has simple and reasonable structure, easy manufacture and easy assembly on the premise of ensuring complete functions and reliable performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a breaking unit of the present invention;

FIG. 2 is a schematic diagram of an arc chute set according to the present invention;

FIG. 3 is a schematic structural diagram of a magnetic conductive device according to the present invention;

fig. 4 is a schematic structural diagram of a rotary moving contact device according to the present invention;

FIG. 5 is a schematic view of a rotating shaft structure according to the present invention;

FIG. 6 is a schematic structural view of the shaped spring of the present invention;

fig. 7 is a schematic structural diagram of a movable contact according to the present invention;

fig. 8 is a schematic structural view of the application of the breaking unit of the present invention in a circuit breaker;

in the figure, 1-arc guiding sheet, 2-shell, 21-left shell, 22-right shell, 3-static contact, 31-long static contact, 32-short static contact, 4-magnetic conducting device, 41-magnetic conducting coil, 42-iron core, 5-magnetic conducting plate, 6-rotary moving contact device, 61-rotating shaft, 611-spring shaft cavity, 612-spring cavity, 613-connecting through hole, 614-cylindrical protrusion, 62-spring shaft, 63-moving contact, 631-second groove, 632-first groove, 633-end arm, 634-silver contact, 64-special spring, 641-tension spring, 642-special spring connecting part, 7-rivet, 8-second arc isolating cover, 81-clamp spring, 9-arc extinguishing chamber, 91-arc extinguishing grid group, 911-arc extinguishing grid sheet, 9111-pin, 9112-notch, 912-arc isolating plate, 92-first arc extinguishing chamber, 93-second arc extinguishing chamber, 10-first arc isolating cover, 11-air outlet, 12-arc extinguishing baffle, 13-base and 14-operating mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.

The terms of direction and position of the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the use of directional and positional terms is intended to illustrate and understand the present invention and is not intended to limit the scope of the present invention.

As shown in fig. 4 to 7, in an embodiment of the present invention, a rotary movable contact device includes a rotating shaft 61, a spring shaft 62 and a movable contact 63, two spring shaft receiving cavities 611 and two spring receiving cavities 612 are disposed in the rotating shaft 61, the spring shaft 62 is disposed in the spring shaft receiving cavity 611, a special-shaped spring 64 is disposed in the spring receiving cavity 612, the special-shaped spring 64 is two tension springs 641 that are disposed in parallel at a certain interval, and has one end connected together, the other end fixed to the spring shaft 62, the movable contact 63 is disposed in the interval between the two tension springs 641 of the special-shaped spring 64, two side faces of the movable contact 63 are attached to the tension springs 641, the movable contact 63 is obliquely and symmetrically provided with two end arms 633 facing opposite, a first groove 632 and a second groove 631 are disposed at the beginning of the end arms 633, and both the first groove 632 and the second groove 631 can form an elastic fixation with a connecting portion 642 of the special-shaped spring, the moving contact is elastically limited and fixed by using the special-shaped spring, compared with the prior art, redundant parts such as a fixed shaft, a fixed sheet and the like are planed, and the device has the advantages of simple and reasonable structure, easiness in manufacturing and easiness in assembling on the premise of ensuring complete functions and reliable performance.

Two connecting through holes 613 are symmetrically arranged on the end surface of the rotating shaft 1 and are used for connecting other components in the circuit breaker.

The end face of the rotating shaft is provided with a cylindrical protrusion 614 which is matched with a corresponding groove on the outer shell when rotating, so that the limiting effect is achieved.

The ends of the moving contact end arms are provided with silver contacts 634 facing opposite directions, and the silver contacts are matched with the silver contacts of the static contacts.

As shown in fig. 1 to 3, the rotary moving contact device may be disposed in a breaking unit, the breaking unit includes a housing 2, a static contact 3 and a moving contact 63, two arc extinguish chambers 9 are disposed in the housing 2, which are a first arc extinguish chamber 92 and a second arc extinguish chamber 93, arc extinguish grid groups 91 are disposed in the first arc extinguish chamber 92 and the second arc extinguish chamber 93, the static contact 3 is in a hook shape, a magnetic conductive device 4 is disposed in the hook of the static contact 3, a first arc shield 10 is disposed outside the hook, magnetic conductive plates 5 are disposed at two ends of the magnetic conductive device 4 in parallel, a second arc shield 8 is disposed at a lower end of the magnetic conductive plate 5, the static contact 3 and the moving contact 63 move in the middle of the magnetic conductive plate 5 in parallel, and the moving direction is perpendicular to the magnetic conductive plate 5, an arc conductive sheet 1 is embedded in an inner wall of the housing 2 and is parallel to the static contact 3, the magnetic conductive plate 5 is fixed at two ends of the moving contact 63 and the moving part of the moving contact 3 by the second arc shield 8, meanwhile, the first arc-isolating cover 10 is arranged on the static contact 3 to prevent electric arc spraying from damaging other components, then a magnetic field is generated between the parallel magnetic conducting plates 5 through the magnetic conducting device 4 on the static contact 3 to blow electric arcs generated by the moving contact 63 and the static contact 3 into the arc extinguish chamber, and then the voltage is reduced and cooled through the arc extinguish grid group 91, further, the arc-conducting plate 1 is further arranged to accelerate the electric arcs to be led into the arc extinguish grid group 91, and the arc extinguish efficiency is greatly improved.

The arc extinguishing grid group 91 consists of a plurality of arc extinguishing grid pieces 911 arranged in parallel and arc barriers 912 arranged at two ends and used for fixing the arc extinguishing grid pieces, a fault arc is divided into a plurality of small arcs, the voltage of the arc is increased by utilizing the near-cathode effect of the alternating current arc to reduce the fault current so as to achieve the arc extinguishing effect, and specifically, the arc extinguishing grid group 91 consists of seven arc extinguishing grid pieces 911 arranged in parallel and two arc barriers 912 arranged at two ends and used for fixing the arc extinguishing grid pieces; preferably, the arc-extinguishing grid 911 is a rectangle, two short sides of which are symmetrically provided with four pins 9111 to match with the grooves in the housing, and the center of the long side of one side of the arc-extinguishing grid is provided with a notch 9112, and further, the arc-extinguishing grid 911 can be designed into other shapes according to requirements.

The explosion chamber is equipped with gas outlet 11, gas outlet play is equipped with flashover baffle 12, cuts apart into the little electric arc of many sections with trouble electric arc, guarantees that the hot gas flow that produces can in time cool off and disperse when the arc extinguishing, and the gas outlet can blow the system cooperation with the magnetism of circuit breaker, strengthens magnetism greatly and blows the effect.

The magnetic conducting device is composed of a magnetic conducting coil 41 and an iron core 42 penetrating through the coil, and provides magnetic force.

The second arc-isolating cover 8 is provided with a clamp spring 81 which is used for being embedded into the shell to be fixed, the installation is convenient, and the part is an arc moving part which is not suitable for being connected by using screws.

The fixed contacts are divided into a long fixed contact 31 and a short fixed contact 32, which are both in a hook shape, the hook portion of the long fixed contact 31 is arranged in the first arc-extinguishing chamber 92, the tail portion of the hook portion extends out of the housing, and is externally provided with a through hole for electrical connection, the hook portion of the short fixed contact 32 is arranged in the second arc-extinguishing chamber 93, the tail portion of the hook portion extends out of the housing, and is externally provided with a through hole for electrical connection.

The first arc-extinguishing chamber 92 and the second arc-extinguishing chamber 93 have the same internal structure except for the stationary contact 3.

A rotary moving contact device 6 is arranged between the first arc-extinguishing chamber 92 and the second arc-extinguishing chamber 93.

The shell 2 is divided into a left shell 21 and a right shell 22, the left shell 21 and the right shell 22 are connected through rivets 7, and specifically, seven rivet connection structures are arranged, so that the structure is firm and reliable, and good air tightness is achieved.

The inner walls of the left shell 21 and the right shell 22 are symmetrically provided with clamping grooves for embedding the rotary moving contact device 6, the static contact 3 and the arc extinguishing grid group 91, so that the device is reasonable in internal layout and convenient to assemble.

Further, the rotary moving contact device can be directly arranged in the molded case circuit breaker.

As shown in fig. 8, a plurality of breaking units can be combined together through a dedicated base 13, and controlled by an operating mechanism 14 in a unified manner, so that the breaking units can be switched on manually or electrically, after a moving contact 63 and a static contact 3 are closed, a free tripping mechanism locks the closed contact at the switching-on position, and when a circuit fails, the circuit automatically trips through respective actions of rotating the moving contact devices 6, so as to achieve a protection effect.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.

Claims

1. The utility model provides a rotatory moving contact device, includes pivot (61), spring axle (62) and moving contact (63), its characterized in that: two spring shaft containing cavities (611) and two spring containing cavities (612) are arranged in the rotating shaft (61), a spring shaft (62) is arranged in the spring shaft containing cavity (611), a special-shaped spring (64) is arranged in the spring containing cavity (612), the special-shaped spring (64) is two tension springs (641) which are arranged in parallel at a certain interval and one end of each tension spring is connected together, the other end of the special-shaped spring is fixed with a spring shaft (62), a moving contact (63) is arranged in the space between two tension springs (641) of the special-shaped spring (64), two side surfaces of the moving contact (63) are attached to the tension spring (641), two end arms (633) with opposite directions are obliquely and symmetrically arranged on the moving contact (63), the starting position of the end arm (633) is provided with a first groove (632) and a second groove (631), the first groove (632) and the second groove (631) can be elastically fixed with the special-shaped spring connecting part (642).

2. A rotary movable contact device according to claim 1, wherein: two connecting through holes (613) are symmetrically arranged on the end face of the rotating shaft (61).

3. A rotary movable contact device according to claim 1, wherein: and a cylindrical bulge (614) is arranged on the end surface of the rotating shaft.

4. A rotary movable contact device according to claim 1, wherein: the ends of the moving contact end arms are provided with silver contacts (634) facing opposite directions.

5. A rotary movable contact device according to claim 1, wherein: the rotary moving contact device (6) is arranged in a breaking unit of the molded case circuit breaker.

6. A rotary movable contact device according to claim 5, wherein: a shell (2) is arranged in the breaking unit, and a clamping groove for embedding the rotary moving contact device (6) is formed in the shell.

7. A rotary movable contact device according to claim 5, wherein: a first arc-extinguishing chamber (92) and a second arc-extinguishing chamber (93) are arranged on two sides of a rotary contact device (6) in the breaking unit, and a static contact (3) matched with the first arc-extinguishing chamber is further arranged.

8. A rotary movable contact arrangement according to claim 7, wherein: the fixed contact is divided into a long fixed contact (31) and a short fixed contact (32), the long fixed contact (31) is arranged in a first arc extinguish chamber (92), and the short fixed contact (32) is arranged in a second arc extinguish chamber (93).

9. A rotary movable contact arrangement according to claim 7, wherein: all be equipped with arc extinguishing bars group (91) in first explosion chamber (92) and second explosion chamber (93), arc extinguishing bars group (91) comprise arc extinguishing bars piece (911) and setting at both ends and are used for fixed arc extinguishing bars piece flash barrier (912) of several parallel arrangement.

10. A rotary movable contact device according to claim 1, wherein: the rotary moving contact device (6) is arranged in the molded case circuit breaker.