CN217606743U

CN217606743U - Electromagnetic mechanism for vacuum circuit breaker

Info

Publication number: CN217606743U
Application number: CN202220287961.5U
Authority: CN
Inventors: 王军; 于庆瑞; 黄文辉; 张世刚; 于浩
Original assignee: Gansu Changcheng Hydrogen Energy Engineering Research Institute Co ltd; Gansu Electric Equipment Group Industrial Engineering Co ltd; Tianshui Great Wall Switchgear Group Co ltd
Current assignee: Gansu Changcheng Hydrogen Energy Engineering Research Institute Co ltd; Gansu Electric Equipment Group Industrial Engineering Co ltd; Tianshui Great Wall Switchgear Group Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-10-18
Anticipated expiration: 2032-02-14

Abstract

The utility model belongs to the technical field of switch equipment, and discloses an electromagnetic mechanism for a vacuum circuit breaker, which comprises a movable iron core and a static iron core group which are matched up and down, wherein a guide rod is arranged in the center of the movable iron core in a penetrating way, and the top of the guide rod is connected with the movable iron core through a guide rod fixing bolt; the static iron core group comprises an outer static iron core and an inner static iron core which are matched with the bottom end of the movable iron core, the outer static iron core is sleeved outside the inner static iron core, a cylindrical closing coil is arranged between the outer static iron core and the inner static iron core, and the bottom end of the movable iron core is provided with a groove matched with the closing coil; the bottom parts of the outer static iron core and the inner static iron core are fixedly connected with a lower static iron core; a protective cover is fixed on the outer wall of the outer static iron core; the closing coil is fixed on the lower static iron core; the closing coil is connected with an external power supply through a closing coil outgoing line penetrating through the lower static iron core; the utility model discloses good reliability, simple structure and with low costs.

Description

Electromagnetic mechanism for vacuum circuit breaker

Technical Field

The utility model belongs to the technical field of switchgear, a electromagnetic mechanism is related to, in particular to electromagnetic mechanism for vacuum circuit breaker.

Background

With continuous progress of science and technology and further improvement of power consumption requirements, people have higher and higher requirements on switch equipment, and energy conservation, high reliability, maintenance-free property and low cost gradually become the development direction of the switch equipment; at present, vacuum circuit breaker's mainstream mechanism adopts spring mechanism usually, because spring mechanism's structure is complicated, spare part quantity is many and mechanical reliability is low, and vacuum circuit breaker's the overwhelming majority trouble is aroused by spring mechanism, if replace spring mechanism with simple structure's electromagnetic mechanism, will make the circuit breaker reliability have very big promotion.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the present invention provides an electromagnetic mechanism for vacuum circuit breaker with good reliability, simple structure and low cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an electromagnetic mechanism for a vacuum circuit breaker comprises a movable iron core and a static iron core group which are matched up and down, wherein a guide rod penetrates through the center of the movable iron core, and the top of the guide rod is connected with the movable iron core through a guide rod fixing bolt; the static iron core group comprises an outer static iron core and an inner static iron core which are matched with the bottom end of the movable iron core, the outer static iron core is sleeved outside the inner static iron core, a cylindrical closing coil is arranged between the outer static iron core and the inner static iron core, and the bottom end of the movable iron core is provided with a groove matched with the closing coil; the closing coil is fixed on the lower static iron core; the bottom parts of the outer static iron core and the inner static iron core are fixedly connected with a lower static iron core; a protective cover is fixed on the outer wall of the outer static iron core; and the closing coil is connected with an external power supply through a closing coil leading-out wire penetrating through the lower static iron core.

Furthermore, lower quiet iron core is square structure, is provided with four screw holes on the quiet iron core down.

Furthermore, a closing coil insert is arranged between the closing coil and the lower static iron core, and the closing coil insert are fixed on the lower static iron core through a closing coil fixing bolt.

Further, outer quiet iron core and interior quiet iron core are the tubular structure, and outer quiet iron core is fixed under on quiet iron core through outer quiet iron core fixing bolt, and interior quiet iron core is fixed under on quiet iron core through interior quiet iron core fixing bolt.

Furthermore, a guide sleeve is fixed on the inner wall of the inner static iron core, the lower part of the guide sleeve is fixed on the lower static iron core, and the guide rod penetrates through the guide sleeve.

Further, the protection casing passes through the protection casing bolt fastening on the outer wall of outer quiet iron core.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model reduces the number of the product parts, reduces the product cost and improves the product reliability through the structure integration design; the utility model adopts an annular arrangement structure as a whole, the magnetic circuit structure is more reasonable, and the movable iron core adopts an E-shaped structure, thereby increasing the effective working area of the electromagnetic force and improving the utilization efficiency of the electromagnetic force; the middle static iron core of the utility model adopts a split type assembly structure, is easy to process and produce, and improves the utilization rate of materials; the utility model discloses well combined floodgate coil adopts the long circle structure, reduces the magnetic leakage, improves electromagnetic efficiency.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a bottom view of the present invention;

FIG. 3 is a schematic diagram of the switching on position of the present invention;

fig. 4 is a schematic diagram of the brake separating position of the present invention.

The automatic closing device comprises a guide rod fixing bolt 1, a guide rod 2, a movable iron core 3, a closing coil 4, a protective cover 5, a protective cover fixing bolt 6, an outer static iron core 7, an inner static iron core 8, a closing coil insert 9, a lower static iron core 10, an outer static iron core fixing bolt 11, a closing coil fixing bolt 12, an inner static iron core fixing bolt 13, a guide sleeve 14, a closing coil leading-out wire 15 and a threaded hole 16.

Detailed Description

An electromagnetic mechanism for a vacuum circuit breaker is shown in figures 1 and 2 and comprises a movable iron core 3 and a static iron core group which are vertically matched, wherein the movable iron core 3 adopts an E-shaped structure, the effective working area of electromagnetic force can be increased, the utilization efficiency of the electromagnetic force is improved, a guide rod 2 penetrates through the center of the movable iron core 3, and the top of the guide rod 2 is connected with the movable iron core 3 through a guide rod fixing bolt 1; the static iron core group comprises an outer static iron core 7 and an inner static iron core 8 which are matched with the bottom end of the movable iron core 3, the outer static iron core 7 is sleeved outside the inner static iron core 8, a cylindrical closing coil 4 is arranged between the outer static iron core 7 and the inner static iron core 8, and a groove matched with the closing coil 4 is arranged at the bottom end of the movable iron core 3; the bottom parts of the outer static iron core 7 and the inner static iron core 8 are fixedly connected with a lower static iron core 10; the outer wall of the outer static iron core 7 is fixed with a protective cover 5; the closing coil 4 is fixed on the lower static iron core 10; the closing coil 4 is connected to an external power source through a closing coil outgoing line 15 penetrating through the lower stationary core 10.

The lower static iron core 10 is of a square structure, four threaded holes 16 are formed in the lower static iron core 10, and the lower static iron core 10 is installed on the vacuum circuit breaker through the threaded holes 16; a closing coil insert 9 is arranged between the closing coil 4 and the lower static iron core 10, and the closing coil 4 and the closing coil insert 9 are fixed on the lower static iron core 10 through a closing coil fixing bolt 12; the outer static iron core 7 and the inner static iron core 8 are both of a cylindrical structure, the outer static iron core 7 is fixed on the lower static iron core 10 through an outer static iron core fixing bolt 11, and the inner static iron core 8 is fixed on the lower static iron core 10 through an inner static iron core fixing bolt 13; a guide sleeve 14 is fixed on the inner wall of the inner static iron core 8, the lower part of the guide sleeve 14 is fixed on the lower static iron core 10, the guide rod 2 penetrates through the guide sleeve 14, and the movable iron core 3 and the guide rod 2 can move up and down in the guide sleeve 14 as a whole; the protective cover 5 is fixed on the outer wall of the outer static iron core 7 through a protective cover bolt 6.

The embodiment is a driving unit for the closing operation of a vacuum circuit breaker, when the vacuum circuit breaker is at a closing position, an electromagnetic mechanism for the vacuum circuit breaker is shown in fig. 4, when the vacuum circuit breaker is closed, an energy storage capacitor and a closing coil outgoing line 15 of the electromagnetic mechanism for the vacuum circuit breaker are connected through a mechanism controller, current is generated in a closing coil 4, induction electromagnetism is generated in a magnetic loop formed by a movable iron core 3 and a static iron core group, a strong magnetic field is generated in an air gap between the movable iron core 3 and the static iron core group, strong magnetic attraction is generated between the movable iron core 3 and the static iron core group, the movable iron core 3 and a guide rod 2 are driven to move downwards, the guide rod 2 drives a vacuum arc extinguish chamber to close through a vacuum circuit breaker transmission system, and the electromagnetic mechanism is kept at a closing position shown in fig. 3.

When the vacuum circuit breaker is in a switching-on position, the electromagnetic mechanism for the vacuum circuit breaker is shown in figure 3, when the vacuum circuit breaker is switched off, the switching-off electromagnet for the vacuum circuit breaker is switched on through the mechanism controller, the switching-off electromagnet drives the locking device to unlock, the contact spring and the switching-off spring of the circuit breaker drive the circuit breaker to be switched off quickly, the movable iron core 3 and the guide rod 2 of the electromagnetic mechanism are driven to move upwards, the switching-off operation of the circuit breaker is completed, and under the action of the switching-off spring of the circuit breaker, the electromagnetic mechanism is kept in a switching-off position shown in figure 4.

Claims

1. An electromagnetic mechanism for a vacuum circuit breaker is characterized by comprising a movable iron core and a static iron core group which are vertically matched, wherein a guide rod penetrates through the center of the movable iron core, and the top of the guide rod is connected with the movable iron core through a guide rod fixing bolt; the static iron core group comprises an outer static iron core and an inner static iron core which are matched with the bottom end of the movable iron core, the outer static iron core is sleeved outside the inner static iron core, a cylindrical closing coil is arranged between the outer static iron core and the inner static iron core, and the bottom end of the movable iron core is provided with a groove matched with the closing coil; the bottom parts of the outer static iron core and the inner static iron core are fixedly connected with a lower static iron core; a protective cover is fixed on the outer wall of the outer static iron core; the closing coil is connected with an external power supply through a closing coil leading-out wire penetrating through the lower static iron core.

2. The electromagnetic mechanism of claim 1, wherein the lower stationary core has a square configuration and four threaded holes are formed in the lower stationary core.

3. The electromagnetic mechanism for a vacuum circuit breaker according to claim 2, wherein a closing coil insert is disposed between the closing coil and the lower stationary core, and the closing coil insert are fixed to the lower stationary core by a closing coil fixing bolt.

4. The electromagnetic mechanism for a vacuum circuit breaker according to claim 3, wherein the outer stationary core and the inner stationary core are both cylindrical structures, the outer stationary core is fixed on the lower stationary core by an outer stationary core fixing bolt, and the inner stationary core is fixed on the lower stationary core by an inner stationary core fixing bolt.

5. The electromagnetic mechanism for a vacuum circuit breaker according to claim 4, wherein a guide sleeve is fixed on the inner wall of the inner stationary core, the lower portion of the guide sleeve is fixed on the lower stationary core, and the guide rod passes through the guide sleeve.