阅读说明：本技术 一种户内真空断路器 (Indoor vacuum circuit breaker ) 是由 吴勇 缪猛 于 2018-06-29 设计创作，主要内容包括：一种户内真空断路器,箱体为台阶状结构,台阶状结构的低端内设置有永磁体,台阶状结构的高端内设置有操动机构拉杆；永磁体包括静铁芯,静铁芯为竖置的圆柱形筒体,圆柱形筒体的顶部和底部设置有封盖,静铁芯的中心设置有动铁芯,静铁芯与动铁芯的连接处从上到下依次设置有分闸线圈、永久磁铁、合闸线圈；动铁芯的顶部设置有顶部杆,动铁芯的底部设置有底部杆,顶部杆与绝缘拉杆连接,底部杆通过拐臂与右侧的输入拐臂的一端连接,输入拐臂的另一端通过连杆与传动臂连接。本发明结构合理,降低了断路器分闸速度,行程中止时运动速度低,冲击小,延长了永磁操动机构的使用寿命,在遇到突发事件时能手动操作,减少了处置时间,降低了损失。(An indoor vacuum circuit breaker, the container body is the step-like structure, there are permanent magnets in the low end of the step-like structure, there are actuating mechanism tie rods in the high end of the step-like structure; the permanent magnet comprises a static iron core, the static iron core is a vertically arranged cylindrical barrel, the top and the bottom of the cylindrical barrel are provided with sealing covers, the center of the static iron core is provided with a movable iron core, and the joint of the static iron core and the movable iron core is sequentially provided with a switching-off coil, a permanent magnet and a switching-on coil from top to bottom; the top of moving the iron core is provided with the top pole, and the bottom of moving the iron core is provided with the bottom pole, and the top pole is connected with insulating pull rod, and the bottom pole passes through the connecting lever to be connected with the one end of the input connecting lever on right side, and the other end of input connecting lever passes through the connecting rod to be connected with the driving arm. The permanent magnet operating mechanism has a reasonable structure, reduces the switching speed of the circuit breaker, has low moving speed and small impact when the stroke is stopped, prolongs the service life of the permanent magnet operating mechanism, can be manually operated when an emergency occurs, reduces the treatment time and reduces the loss.)

1. The utility model provides an indoor vacuum circuit breaker, including sealing utmost point post admittedly, the box, seal utmost point post admittedly and install at the box top, seal utmost point post admittedly and include outlet wire seat (1), vacuum interrupter (2), outlet wire seat (3) down, insulating casing (4) and insulating pull rod (5), go up outlet wire seat (1) and outlet wire seat (3) down and locate the top and the bottom of vacuum interrupter (2) respectively, move the conducting rod on vacuum interrupter (2) is connected to the upper end of insulating pull rod (5), vacuum interrupter (2) and insulating pull rod (5) seal in insulating casing (4), its characterized in that: the box body is of a step-shaped structure, a permanent magnet is arranged at the lower end of the step-shaped structure, and an operating mechanism pull rod (15) is arranged at the high end of the step-shaped structure;

the permanent magnet comprises a static iron core (7), the static iron core (7) is a vertically arranged cylindrical barrel, sealing covers are arranged at the top and the bottom of the cylindrical barrel, a movable iron core (9) is arranged at the center of the static iron core (7), and a switching-off coil (6), a permanent magnet (8) and a switching-on coil (10) are sequentially arranged at the joint of the static iron core (7) and the movable iron core (9) from top to bottom;

the top of the movable iron core (9) is provided with a top rod, the bottom of the movable iron core (9) is provided with a bottom rod, the top rod is connected with the insulating pull rod (5), the bottom rod is connected with one end of an input crank arm (12) on the right side through a crank arm (11), and the other end of the input crank arm (12) is connected with a transmission arm (14) through a connecting rod (13);

the input crank arm (12) comprises connecting plates (1203) arranged in front and back, a rotating block (1201), a main shaft (1202) and a shaft sleeve (1204) are sequentially arranged between the two connecting plates (1203) from left to right, the rotating block (1201) is connected with the crank arm (11), supporting plates (1205) which are symmetrically arranged are arranged on the front end face and the back end face of each connecting plate (1203), and a shaft in each shaft sleeve (1204) is connected with a connecting rod (13); the shaft sleeve (1204) and the inner sides of the two connecting plates (1203) are welded by argon arc welding; the outer end faces of the main shaft (1202) and the two connecting plates (1203) are welded and ground flat by argon arc welding.

2. An indoor vacuum circuit breaker according to claim 1 wherein: and a contact spring is arranged at the connecting end of the crank arm (11) and the input crank arm (12).

3. An indoor vacuum circuit breaker according to claim 1 wherein: the other two ends of the input crank arm (12) can move around the main shaft in sequence.

Technical Field

The invention belongs to the technical field of electric power and electricity, and particularly relates to a 40.5kV indoor vacuum circuit breaker.

Background

The high-voltage electrical apparatus is used for realizing closing, opening, protecting, controlling, regulating and measuring equipment in a high-voltage line. The high-voltage electric appliances include switch electric appliances, measuring electric appliances and current-limiting and voltage-limiting electric appliances. Wherein, the high-voltage switch equipment is power system switch equipment with the voltage of 3kV or above and the frequency of below 50 Hz. The equipment is mainly applied to the protection and control of a power system, partial equipment or lines are put into or taken out of the operation of the power grid according to the actual operation condition of the power grid, and when the equipment and the circuits have faults, the parts with the faults are quickly disconnected from the lines through high-voltage switch equipment, so that the safe operation of the whole power grid and the safety of equipment maintenance personnel are ensured.

While the voltage grade of the arc extinguish chamber of the vacuum circuit breaker is continuously improved, the operating mechanism of the vacuum circuit breaker is also continuously improved, and the vacuum circuit breaker goes through the process of developing from an electromagnetic operating mechanism and a spring operating mechanism to a permanent magnet operating mechanism. The electromagnetic operating mechanism consists of an electromagnet, a brake separating spring and a necessary mechanical lock catch, and has the characteristics of simple structure, few parts and low manufacturing cost. Although the output characteristic of the electromagnetic operating mechanism easily meets the requirement of the closing reaction force characteristic of the vacuum circuit breaker, the electromagnetic operating mechanism is gradually out of use because the action time is long and the power consumed by the closing coil is large. The spring operating mechanism stores energy required by opening and closing by a spring, pushes a movable contact of the circuit breaker to act through a cam and a connecting rod mechanism, and can adjust the opening and closing speed by adjusting the pressure of the spring. At present, the technical development of the spring operating mechanism is mature, however, the spring operating mechanism has many mechanical parts, the reliability of the mechanism may be affected by the material quality, the processing precision and the assembling precision of parts, and the spring mechanism has the defects of poor controllability and low efficiency, so that the application of the spring operating mechanism in the field of switch intellectualization is limited.

The 40.5kV indoor high-voltage vacuum circuit breaker is suitable for a three-phase alternating current 50Hz and rated voltage 40.5kV power system, can be used for industrial and mining enterprises, power plants and transformer substations for dividing and combining load current, overload current and short-circuit current, and is suitable for frequent operation places. The structure of the vacuum pole-type vacuum switch comprises three parts, namely a pole part, an operating mechanism and a chassis, wherein the pole part comprises a vacuum arc-extinguishing chamber, a vacuum pole, a static contact and a moving contact, the static contact and the moving contact are arranged in the vacuum arc-extinguishing chamber, the moving contact is connected with a lower vacuum pole and is connected with the operating mechanism through a pull rod, and the static contact is connected with an upper vacuum pole. The following technical drawbacks exist: the high-voltage vacuum circuit breaker crank arm has large swing amount in the switching-on and switching-off process, which causes large bounce in the switching-on and switching-off process of the vacuum circuit breaker, the vacuum circuit breaker is re-ignited due to the large bounce, and the switching-on and switching-off can not be effectively performed, so that the 40.5KV indoor vacuum circuit breaker can not reliably operate.

The permanent magnet operating mechanism has the advantages that: (1) because need not provide the energy for separating brake when closing a floodgate, it is less to close a floodgate energy, and closing a floodgate coil line diameter is thinner, and the supply current that needs is less: (2) when the mechanism is in the switching-on position, the permanent magnet only needs to overcome the force of the contact spring but does not include the force of the switching-off spring; the following technical defects exist in use: 1) in the process of opening the brake, because the breaker requires higher rigid opening speed for the operating mechanism, larger current needs to be conducted at the beginning of the stroke, and in the process of opening the brake, because the working air gap is smaller and smaller, the force generated by the exciting current is larger and larger, the original blocking effect of the permanent magnet on the opening speed is changed into the pushing effect, the opening speed of the breaker is further accelerated, the movement speed is higher when the stroke is stopped, great impact is formed, and the service life of the permanent magnet operating mechanism is shortened; 2) when an emergency occurs, the manual operation cannot be carried out, the optimal treatment time is delayed, and irreparable loss is caused.

How to design an indoor vacuum circuit breaker, how to reduce circuit breaker separating brake speed, reduce the impact, how to make the effectual divide-shut brake of connecting lever ability when manual operation, become the problem that the urgent need was solved.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide an indoor vacuum circuit breaker which reduces the opening speed of the circuit breaker, reduces the impact and enables a crank arm to be effectively opened and closed during manual operation.

In order to achieve the above objects and other related objects, the present invention provides an indoor vacuum circuit breaker, including an embedded pole, a box body, where the embedded pole is installed at the top of the box body, the embedded pole includes an upper wire outlet seat, a vacuum arc-extinguishing chamber, a lower wire outlet seat, an insulating housing and an insulating pull rod, the upper wire outlet seat and the lower wire outlet seat are respectively arranged at the top and the bottom of the vacuum arc-extinguishing chamber, the upper end of the insulating pull rod is connected to a movable conductive rod on the vacuum arc-extinguishing chamber, and the vacuum arc-extinguishing chamber and the insulating pull rod are enclosed in the insulating housing, which is characterized in that: the box body is of a step-shaped structure, a permanent magnet is arranged at the lower end of the step-shaped structure, and an operating mechanism pull rod is arranged at the high end of the step-shaped structure;

the permanent magnet comprises a static iron core, the static iron core is a vertically arranged cylindrical barrel, the top and the bottom of the cylindrical barrel are provided with sealing covers, the center of the static iron core is provided with a movable iron core, and the joint of the static iron core and the movable iron core is sequentially provided with a switching-off coil, a permanent magnet and a switching-on coil from top to bottom;

the top of the movable iron core is provided with a top rod, the bottom of the movable iron core is provided with a bottom rod, the top rod is connected with the insulating pull rod, the bottom rod is connected with one end of the right input connecting lever through a connecting lever, and the other end of the input connecting lever is connected with the transmission arm through a connecting rod;

the input crank arm comprises connecting plates arranged in front and back, a rotating block, a main shaft and a shaft sleeve are sequentially arranged between the two connecting plates from left to right, the rotating block is connected with the crank arm, supporting plates which are symmetrically arranged are arranged on the front end surface and the back end surface of each connecting plate, and a shaft in each shaft sleeve is connected with a connecting rod; the shaft sleeve and the inner sides of the two connecting plates are welded by argon arc welding; the main shaft and the outer end faces of the two connecting plates are welded and ground flat by argon arc welding.

In an embodiment of the present invention, a contact spring is disposed at a connection end of the crank arm and the input crank arm.

In an embodiment of the present invention, a main shaft is disposed in the middle of the input crank arm, and the other two ends of the input crank arm can sequentially move around the main shaft.

The permanent magnet operating mechanism has a reasonable structure, reduces the switching-off speed of the circuit breaker, has low moving speed and small impact when the stroke is stopped, prolongs the service life of the permanent magnet operating mechanism, can be manually operated when an emergency occurs, reduces the handling time, reduces the loss, has small swinging amount of the crank arm in the switching-off and switching-on processes, can effectively switch off and on, can reliably operate the indoor vacuum circuit breaker, and has good economic and social benefits when being popularized and applied.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention.

Fig. 2 is a front view of the input crank arm of the present invention.

Fig. 3 is a top view of the input crank arm of the present invention.

In the figure: 1. an upper wire outlet seat; 2. a vacuum arc-extinguishing chamber; 3. a lower wire outlet seat; 4. an insulating housing; 5. an insulating pull rod; 6. a brake separating coil; 7. a stationary iron core; 8. a permanent magnet; 9. a movable iron core; 10. a closing coil; 11. a crank arm; 12. inputting a crank arm; 13. a connecting rod; 14. a drive arm; 15. a pull rod of the operating mechanism; 1201. rotating the block; 1202. a main shaft; 1203. connecting plates; 1204. a shaft sleeve; 1205. and a support plate.

Detailed Description

The invention is further described with reference to the accompanying drawings, but is not to be construed as being limited thereto.

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1 to 3. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

As shown in fig. 1, an indoor vacuum circuit breaker, including sealing utmost point post admittedly, the box, seal utmost point post admittedly and install at the box top, seal utmost point post admittedly and include outlet wire seat 1, vacuum interrupter 2, outlet wire seat 3 down, insulating housing 4 and insulating pull rod 5, go up outlet wire seat 1 and outlet wire seat 3 down and locate vacuum interrupter 2's top and bottom respectively, the movable conducting rod on vacuum interrupter 2 is connected to the upper end of insulating pull rod 5, vacuum interrupter 2 and insulating pull rod 5 seal in insulating housing 4, its characterized in that: the box body is of a step-shaped structure, a permanent magnet is arranged at the lower end of the step-shaped structure, and an operating mechanism pull rod 15 is arranged at the high end of the step-shaped structure;

the permanent magnet comprises a static iron core 7, the static iron core 7 is a vertically arranged cylindrical barrel, sealing covers are arranged at the top and the bottom of the cylindrical barrel, a movable iron core 9 is arranged at the center of the static iron core 7, and a switching-off coil 6, a permanent magnet 8 and a switching-on coil 10 are sequentially arranged at the joint of the static iron core 7 and the movable iron core 9 from top to bottom;

the top of the movable iron core 9 is provided with a top rod, the bottom of the movable iron core 9 is provided with a bottom rod, the top rod is connected with the insulating pull rod 5, the bottom rod is connected with one end of an input crank arm 12 on the right side through a crank arm 11, and the other end of the input crank arm 12 is connected with a transmission arm 14 through a connecting rod 13;

the input crank arm 12 comprises connecting plates 1203 arranged in front and back, a rotating block 1201, a main shaft 1202 and a shaft sleeve 1204 are sequentially arranged between the two connecting plates 1203 from left to right, the rotating block 1201 is connected with the crank arm 11, supporting plates 1205 symmetrically arranged are arranged on the front end face and the back end face of each connecting plate 1203, and a shaft in each shaft sleeve 1204 is connected with a connecting rod 13; the shaft sleeve 1204 and the inner sides of the two connecting plates 1203 are welded by argon arc welding; the outer end faces of the main shaft 1202 and the two connecting plates 1203 are welded and ground flat by argon arc welding; the swinging amount of the crank arm in the switching-on and switching-off process is small, the switching-on and switching-off can be effectively realized, and the indoor vacuum circuit breaker can reliably run;

a contact spring is arranged at the connecting end of the crank arm 11 and the input crank arm 12;

the middle part of the input crank arm 12 is provided with a main shaft, and the other two ends of the input crank arm 12 can move around the main shaft in sequence.