阅读说明：本技术 一种带隔离的直动式断路器 (Direct-acting circuit breaker with isolation ) 是由 黄志方 王鹏 戴永正 成志伟 曹莉 顾宇锋 李巍 许俊杰 马千里 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种带隔离的直动式断路器：包括操作装置、极柱、接线柱一、接线柱二、隔离开关、触头及用于驱动隔离开关沿着触头运动的触头驱动装置,极柱内设有灭弧室,灭弧室的一端设有绝缘拉杆,另一端设有极柱触头,绝缘拉杆通过拉杆连接板连接于操作装置的动力输出端；极柱连接于接线柱一,触头连接接线柱二；当处于合闸状态时,灭弧室处于导通状态且隔离开关连接于极柱触头；当处于分闸状态时,灭弧室处于断开状态且隔离开关与极柱触头脱离,形成安全断口。本发明主回路的结构比较简单,三个主回路呈“品”字型分布,使三者之间的电场更加均匀。操作装置与绝缘拉杆之间是通过直连的方式驱动,能量损失小,驱动更为直接,有利于降低故障率。(The invention discloses a direct-acting breaker with isolation, which comprises: the intelligent control device comprises an operating device, a pole, a first terminal, a second terminal, a disconnecting switch, a contact and a contact driving device for driving the disconnecting switch to move along the contact, wherein an arc extinguish chamber is arranged in the pole, one end of the arc extinguish chamber is provided with an insulating pull rod, the other end of the arc extinguish chamber is provided with a pole contact, and the insulating pull rod is connected to a power output end of the operating device through a pull rod connecting plate; the pole is connected with the first wiring terminal, and the contact is connected with the second wiring terminal; when the arc extinguishing chamber is in a switching-on state, the arc extinguishing chamber is in a conducting state and the isolating switch is connected with the pole contact; when the switch-off state is achieved, the arc extinguish chamber is in a disconnection state, and the isolating switch is separated from the pole contact, so that a safety fracture is formed. The structure of the main loop is simple, and the three main loops are distributed in a shape of Chinese character pin, so that the electric fields among the three main loops are more uniform. The operating device and the insulating pull rod are driven in a direct connection mode, so that energy loss is low, the driving is more direct, and the reduction of the failure rate is facilitated.)

1. The utility model provides a direct action type circuit breaker of area isolation which characterized in that: the device comprises an operating device (1), a pole (2), a first terminal (6), a second terminal (7), a disconnecting switch (3), a contact (4) and a contact driving device for driving the disconnecting switch (3) to move along the contact (4), wherein an arc extinguish chamber (9) is arranged in the pole (2), one end of the arc extinguish chamber (9) is provided with an insulating pull rod (91), the other end of the arc extinguish chamber is provided with a pole contact (21), and the insulating pull rod (91) is connected to a power output end of the operating device (1) through a pull rod connecting plate (12);

the pole (2) is connected with the first binding post (6), and the contact (4) is connected with the second binding post (7);

when the circuit breaker is in a switching-on state, the arc extinguishing chamber (9) is in a conducting state and the isolating switch (3) is connected to the pole contact (21);

when the breaker is in a switching-off state, the arc extinguish chamber (9) is in a switching-off state and the isolating switch (3) is separated from the pole contact (21), so that a safety fracture is formed.

2. The direct acting circuit breaker with isolation of claim 1, wherein: the contact driving device comprises a lead screw (5) and a lead screw connecting plate (8) connected to the lead screw (5) through threads, the lead screw connecting plate (8) is connected to the end portion of the isolating switch (3), and the lead screw (5) is connected with a lead screw driving device used for driving the lead screw (5) to rotate.

3. The direct acting circuit breaker with isolation of claim 2, wherein: the screw rod driving device comprises a motor (51) and a hand driving device (52), and power output ends of the motor (51) and the hand driving device (52) are connected to the screw rod (5).

4. The direct acting circuit breaker with isolation of claim 1, wherein: the electric power tool is characterized by further comprising a shell, wherein the operating device (1), the pole (2), the isolating switch (3), the contact (4) and the lead screw (5) are arranged inside the shell, and the first wiring terminal (6) and the second wiring terminal (7) penetrate through the shell.

5. The direct acting circuit breaker with isolation of claim 1, wherein: the isolating switch further comprises a current transformer (10), and the current transformer (10) is connected to the isolating switch (3).

6. The direct acting circuit breaker with isolation of claim 4, wherein: the operating device (1) is connected to the shell through an operating device mounting plate (11), and a power output end of the operating device (1) penetrates through the operating device mounting plate (11) to be connected to the pull rod connecting plate (12).

7. The direct acting circuit breaker with isolation of claim 1, wherein: the pole (2) and the isolating switch (3) are three and are in a structure shaped like a Chinese character 'pin'.

8. The direct acting circuit breaker with isolation of claim 5, wherein: the current transformer (10) is arranged between the contact (4) and the pole contact (21) and is sleeved on the isolating switch (3).

Technical Field

The invention relates to the technical field of secondary equipment for power transmission, in particular to a direct-acting breaker with isolation.

Background

The isolating switch is mainly used for reliably isolating a part needing power failure from a live part in the high-voltage distribution device so as to ensure the safety of maintenance work. The arc extinguish chamber and the isolating knife are main body parts of the isolating switch, and the requirements of large loads are met due to the closing and opening of the arc extinguish chamber, so that a large amount of energy is needed, the moving directions of an operating device of the isolating switch and the arc extinguish chamber in the prior art are not collinear, so that the power transmitted to the arc extinguish chamber by the operating device is lost, the power of the operating device is needed to be increased while the working requirements of the arc extinguish chamber are met, and the power, the strength and the high failure rate of the operating device are increased, namely the effective output power of the operating device in the prior art is required to be improved.

In addition, the operation of the isolation knife in the prior art is realized in a rotating mode, the isolation knife can be matched with the corresponding electrode through rotating, and the stability and the capacity of passing fault current of the operation mode are still to be improved.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a direct-acting circuit breaker with isolation, which solves the technical problems that the effective output power of an operating device is not high, the operation stability of an isolation knife and the fault current passing capacity need to be improved in the prior art.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a direct acting circuit breaker with isolation: the intelligent control device comprises an operating device, a pole, a first terminal, a second terminal, a disconnecting switch, a contact and a contact driving device for driving the disconnecting switch to move along the contact, wherein an arc extinguish chamber is arranged in the pole, one end of the arc extinguish chamber is provided with an insulating pull rod, the other end of the arc extinguish chamber is provided with a pole contact, and the insulating pull rod is connected to a power output end of the operating device through a pull rod connecting plate;

the pole is connected with the first wiring terminal, and the contact is connected with the second wiring terminal;

when the arc extinguishing chamber is in a switching-on state, the arc extinguishing chamber is in a conducting state and the isolating switch is connected with the pole contact;

when the switch-off state is achieved, the arc extinguish chamber is in a disconnection state, and the isolating switch is separated from the pole contact, so that a safety fracture is formed.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: the contact driving device comprises a lead screw and a lead screw connecting plate connected to the lead screw through threads, the lead screw connecting plate is connected to the end portion of the isolating switch, and the lead screw is connected with a lead screw driving device used for driving the lead screw to rotate.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: the screw driving device comprises a motor and a hand driving device, and the power output ends of the motor and the hand driving device are connected to the screw.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: the electric connector is characterized by further comprising a shell, the operating device, the pole, the isolating switch, the contact and the screw rod are all arranged inside the shell, and the first wiring terminal and the second wiring terminal penetrate through the shell.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: still include current transformer, current transformer connects in isolator.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: the operating device is connected to the shell through the operating device mounting plate, and the power output end of the operating device penetrates through the operating device mounting plate to be connected to the pull rod connecting plate.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: the pole and the isolating switch are respectively provided with three poles and are in a structure like the Chinese character 'pin'.

Preferably, the direct acting circuit breaker with isolation of the foregoing type: the current transformer is arranged between the contact and the pole contact and is sleeved on the isolating switch.

The invention achieves the following beneficial effects:

compared with the prior art, the structure of the main loop is simpler, and the three main loops are distributed in a shape of Chinese character pin, so that the electric fields among the three main loops are more uniform. The operating device and the insulating pull rod are driven in a direct connection mode, so that the energy loss is small, the driving is more direct, the operating device can meet the working requirement of the arc extinguish chamber without large power, and the operating device has the advantages of simpler structure, omission of a middle transmission structure and contribution to reducing the failure rate. Moreover, the isolation knife is telescopic, good in stability and strong in fault current passing capability.

Drawings

FIG. 1 is a first overall block diagram of the present invention;

FIG. 2 is a second overall structure of the present invention (hidden housing);

FIG. 3 is a cross-sectional view of the present invention (hiding the housing and operating device);

FIG. 4 is a block diagram of a single arc chute, isolator switch of the present invention;

FIG. 5 is an end view of the overall mechanism of the present invention;

the meaning of the reference numerals: 1-operating the device; 2-pole column; 3-an isolating switch; 4-a contact; 5-a lead screw; 6, a first wiring terminal; 7-a second terminal; 8-a lead screw connecting plate; 9-an arc extinguishing chamber; 11-an operating device mounting plate; 12-a tie bar connection plate; 21-pole contact; 51-a motor; 52-hand drive means; 91-insulating tie rod; 10-current transformer.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 4: the embodiment discloses a direct-acting circuit breaker with isolation, which comprises an operating device 1, a pole 2, a first terminal 6, a second terminal 7, an isolating switch 3, a contact 4 and a contact driving device for driving the isolating switch 3 to move along the contact 4, wherein an arc extinguish chamber 9 is arranged in the pole 2, one end of the arc extinguish chamber 9 is provided with an insulating pull rod 91, the other end of the arc extinguish chamber is provided with a pole contact 21, the insulating pull rod 91 is connected to a power output end of the operating device 1 through a pull rod connecting plate 12, the pole 2 is connected to the first terminal 6, and the contact 4 is connected with the second;

When the circuit breaker is in a switching-on state, the operating device 1 extends out, the arc extinguish chamber 9 is in a conducting device, the isolating switch 3 is connected to the pole contact 21, and the whole isolating switch is in a conducting state.

When in the open state, the operating device 1 contracts, the arc chute 9 is in the disconnecting device and the disconnector 3 is disengaged from the pole contact 21.

Specifically, the contact driving device comprises a lead screw 5 and a lead screw connecting plate 8 connected to the lead screw 5 through threads, the lead screw connecting plate 8 is connected to the end of the isolating switch 3, and the lead screw 5 is connected with a lead screw driving device for driving the lead screw 5 to rotate.

The screw driving device comprises a motor 51 and a hand driving device 52, and the power output ends of the motor 51 and the hand driving device 52 are both connected to the screw 5. The hand driving device 52 may be a hand wheel, a rocker, or other conventional devices.

The invention also comprises a shell, wherein the operating device 1, the pole 2, the isolating switch 3, the contact 4 and the screw rod 5 are all arranged in the shell, the first terminal 6 and the second terminal 7 penetrate through the shell, and the hand driving device 52 also penetrates through the shell.

In order to detect current and voltage, the invention comprises a current transformer 10, wherein the current transformer 10 is connected with the isolating switch 3, and is preferably arranged between the contact 4 and the pole contact 21 and sleeved on the outer surface of the isolating switch 3.

The operating device 1 is connected to the housing by an operating device mounting plate 11, and the power output end of the operating device 1 passes through the operating device mounting plate 11 and is connected to a tie rod connecting plate 12.

The three pole columns 2 and the three isolating switches 3 form a loop, the pole columns 2, the isolating switches 3, the first binding posts 6 and the second binding posts 7 form three loops, and the three loops are of a structure shaped like a Chinese character 'pin', so that an electric field is more uniform due to the structure shaped like the Chinese character 'pin'.

When the device is used, the first binding post 6 and the second binding post 7 are respectively connected with a wire inlet end and a wire outlet end, and the power output end of the operating device 1 simultaneously drives the three insulating pull rods 91 to move through the pull rod connecting plate 12, so that the arc extinguish chamber 9 is closed or disconnected.

The operation of the isolating switch is: through motor 51 drive lead screw 5 rotatory, lead screw 5 is rotatory to drive lead screw connecting plate 8 and is removed, and lead screw connecting plate 8 is with the synchronous push-and-pull of three isolator 3, and at the in-process of push-and-pull, isolator 3 is connected with contact 4 all the time, when isolator 3 inserts to the inside of utmost point post contact 21, can realize switching on of terminal two 7 and explosion chamber 9.

Compared with the prior art, the structure of the main loop is simpler, and the three main loops are distributed in a shape of Chinese character pin, so that the electric fields among the three main loops are more uniform. The operating device 1 and the insulating pull rod 91 are directly connected to drive, so that energy loss is low, the driving is more direct, the operating device 1 can meet the working requirement of the arc extinguish chamber 9 without large power, and the operating device 1 has the advantages of simpler structure, omission of a middle transmission structure and contribution to reducing the failure rate. Moreover, the isolation knife is telescopic, good in stability and strong in fault current passing capability.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.