阅读说明：本技术 一种安全操作系统及使用方法 (Safe operating system and using method ) 是由 李权辉 左文瑞 张小兵 李小强 邱智纯 陈楚明 黄太斌 李献京 杨智生 王志康 于 2019-09-30 设计创作，主要内容包括：本发明涉及一种冶金高压电气设备技术领域,更具体地说,它涉及一种安全系统及使用方法,其技术方案要点是：包括操作台、可编程逻辑控制器、电控箱以及高压隔离开关装置,所述操作台设置有控制按钮、用于起联锁作用的高压允许操作位钥匙开关和高压禁止操作位钥匙开关,所述操作台与所述可编程逻辑控制器电连接,所述可编程逻辑控制器与电控箱电连接,所述电控箱设置有用于控制高压开关分离合闸的按钮、用于起联锁作用的允许合闸位钥匙开关和允许分闸位钥匙开关,所述电控箱和高压隔离开关装置电连接。本发明具有制作简单,操作步骤清晰以及安全有效的优点。(The invention relates to the technical field of metallurgical high-voltage electrical equipment, in particular to a safety system and a using method thereof, and the technical scheme is as follows: the control device comprises an operation platform, a programmable logic controller, an electric cabinet and a high-voltage isolating switch device, wherein the operation platform is provided with a control button, a high-voltage operation-allowable position key switch and a high-voltage operation-forbidden position key switch which are used for playing a role of interlocking, the operation platform is electrically connected with the programmable logic controller, the programmable logic controller is electrically connected with the electric cabinet, the electric cabinet is provided with a button for controlling the high-voltage switch to be separated and switched on, a switch-on-allowable position key switch and a switch-off-allowable position key switch which are used for playing a role of interlocking, and the electric cabinet is electrically connected with the high-voltage isolating switch device. The invention has the advantages of simple manufacture, clear operation steps, safety and effectiveness.)

1. A secure operating system, characterized by: the control device comprises an operation platform, a programmable logic controller, an electric cabinet and a high-voltage isolating switch device, wherein the operation platform is provided with a control button, a high-voltage operation-allowable position key switch and a high-voltage operation-forbidden position key switch which are used for playing a role of interlocking, the operation platform is electrically connected with the programmable logic controller, the programmable logic controller is electrically connected with the electric cabinet, the electric cabinet is provided with a button for controlling the high-voltage switch to be separated and switched on, a switch-on-allowable position key switch and a switch-off-allowable position key switch which are used for playing a role of interlocking, and the electric cabinet is electrically connected with the high-voltage isolating switch device.

2. A secure operating system according to claim 1, characterized in that: the high-voltage isolating switch device comprises a vacuum circuit breaker for controlling and protecting electrical equipment, a high-voltage isolating switch for isolating and a grounding switch for grounding, wherein the vacuum circuit breaker is electrically connected with the high-voltage isolating switch, and the high-voltage isolating switch is electrically connected with the grounding switch.

3. A method for using a secure operating system, comprising:

when power failure operation is performed, the vacuum circuit breaker is opened in a remote operation room, a two-position key switch of an operation table is screwed to a high-voltage forbidden operation position, a key is pulled out to a transformer room, inserted into an electric cabinet for operating the high-voltage isolating switch and screwed to an allowable opening position, the load of the vacuum circuit breaker is disconnected at the moment, the high-voltage isolating switch can be operated to be opened, and the maintenance is started;

when power is transmitted, the high-voltage isolating switch is switched on in the transformer room, the two-position key switch for operating the electric cabinet of the high-voltage isolating switch is screwed to the allowable switching-on position, the key is taken down and returned to the remote operation room, then the two-position key switch of the operation table body device is screwed to the high-voltage allowable operation position, and normal production is recovered.

4. A method for using a secure operating system according to claim 3, wherein: and during the power failure operation, after the vacuum circuit breaker is opened and the circuit breaker indicator lamp of the operating platform is lightened, the key switch is screwed to the high-voltage forbidden operation position at the high-voltage allowed operation position.

5. A method for using a secure operating system according to claim 3, wherein: and when the power failure operation is carried out, the grounding switch is switched on after the high-voltage isolating switch is switched off.

6. A method for using a secure operating system according to claim 3, wherein: and during the power transmission operation, after the grounding switch is switched off, the high-voltage isolating switch is switched on.

Technical Field

The invention relates to the technical field of metallurgical high-voltage electrical equipment, in particular to a safe operation system and a using method thereof.

Background

The high-voltage isolating switch device of the refining furnace comprises a vacuum circuit breaker, a transformer chamber high-voltage isolating switch and a transformer chamber grounding switch. Under the production condition, high-voltage isolating switches in the transformer room are all in a closed state, and grounding switches are all in a breaking state. Under the condition of normal switching-on and switching-off operation, the vacuum circuit breaker is electrically controlled and operated to act by a remote operation room. And the high-voltage isolating switch and the grounding switch of the transformer chamber need to be manually operated on site to switch on and off. When the maintenance work of the refining furnace or the electrode replacement operation is carried out, the high-voltage brake needs to be opened to ensure the work safety, at the moment, the vacuum circuit breaker must be opened to break the load firstly, and simultaneously, the high-voltage isolating switch in the transformer chamber with the load broken is disconnected on site, and the grounding switch is turned to the grounding position to prevent the personnel from carrying the load to operate.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a safe operation system and a method, which have the advantages of simple manufacture, clear operation steps, safety and effectiveness.

The technical purpose of the invention is realized by the following technical scheme: a safe operation system comprises an operation platform, a programmable logic controller, an electric cabinet and a high-voltage isolating switch device, wherein the operation platform is provided with a control button, a high-voltage operation-allowable bit key switch and a high-voltage operation-forbidden bit key switch which are used for interlocking, the operation platform is electrically connected with the programmable logic controller, the programmable logic controller is electrically connected with the electric cabinet, the electric cabinet is provided with a button for controlling the high-voltage switch to be separated and switched on, a switch-on-allowable bit key switch and a switch-off-allowable bit key switch which are used for interlocking, and the electric cabinet is electrically connected with the high-voltage isolating switch device.

By adopting the technical scheme, the hidden danger of arc discharge and short circuit accidents when the high-voltage isolating switch is operated under load is effectively avoided by utilizing the mutual interlocking of the two key switches.

In one embodiment: the high-voltage isolating switch device comprises a vacuum circuit breaker for controlling and protecting electrical equipment, a high-voltage isolating switch for isolating and a grounding switch for grounding, wherein the vacuum circuit breaker is electrically connected with the high-voltage isolating switch, and the high-voltage isolating switch is electrically connected with the grounding switch.

By adopting the technical scheme, the purposes of power-off isolation are realized by utilizing the vacuum circuit breaker, the high-voltage isolating switch and the grounding switch.

The invention also provides a using method of the safe operating system, which comprises the following steps: when power failure operation is performed, the vacuum circuit breaker is opened in a remote operation room, a two-position key switch of an operation table is screwed to a high-voltage forbidden operation position, a key is pulled out to a transformer room, inserted into an electric cabinet for operating the high-voltage isolating switch and screwed to an allowable opening position, the load of the vacuum circuit breaker is disconnected at the moment, the high-voltage isolating switch can be operated to be opened, and the maintenance is started;

when power is transmitted, the high-voltage isolating switch is switched on in the transformer room, the two-position key switch for operating the electric cabinet of the high-voltage isolating switch is screwed to the allowable switching-on position, the key is taken down and returned to the remote operation room, then the two-position key switch of the operation table body device is screwed to the high-voltage allowable operation position, and normal production is recovered.

By adopting the technical scheme, the mutual interlocking of the two-position key switches is utilized, when the high-voltage isolating switch is operated to be switched off, the two-position key switch of the operating platform must be firstly screwed to the high-voltage forbidden operation position, and then the two-position key switch on the electric cabinet is screwed to the allowed switching-off position, so that the hidden danger of arc-discharge short-circuit accidents when the high-voltage isolating switch is operated with load is effectively avoided

In one embodiment: and during the power failure operation, after the vacuum circuit breaker is opened and the circuit breaker indicator lamp of the operating platform is lightened, the key switch is screwed to the high-voltage forbidden operation position at the high-voltage allowed operation position.

By adopting the technical scheme, the safety and stability of operation are ensured.

In one embodiment: and when the power failure operation is carried out, the grounding switch is switched on after the high-voltage isolating switch is switched off.

By adopting the technical scheme, the safety is ensured.

In one embodiment: and during the power transmission operation, after the grounding switch is switched off, the high-voltage isolating switch is switched on.

By adopting the technical scheme, the safety is ensured.

In conclusion, the invention has the following beneficial effects:

the two-position key switch is arranged on the control console of the operation room and the electric cabinet of the transformer room operation high-voltage isolating switch, the switch has two states of a high-voltage allowable operation position and a high-voltage forbidden operation position, the two signals enter the PLC system and are interlocked with the allowable closing condition of the vacuum circuit breaker, and the hidden trouble of arc discharge and short circuit accidents during the operation of the high-voltage isolating switch with load is effectively solved.

Drawings

Fig. 1 is a schematic structural diagram of a safety device according to the present embodiment.

In the figure: 1. an operation table; 2. a programmable logic controller; 3. an electric cabinet; 4. a high voltage isolator switch device; 5. a two-position key switch; 6. a high voltage disable operation bit; 7. a high voltage enable operation position; 8. allowing the closing of the gate; 9. allowing the brake separating position; 10. and a control button.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

A safety system is shown in figure 1 and comprises an operation platform 1, a programmable logic controller 2, an electric cabinet 3 and a high-voltage isolating switch device 4, wherein the operation platform 1 is provided with a control button 10, a high-voltage permission operation position 7 key switch and a high-voltage prohibition operation position 6 key switch which are used for interlocking, the operation platform 1 is electrically connected with the programmable logic controller 2, the programmable logic controller 2 is electrically connected with the electric cabinet 3, the electric cabinet 3 is provided with a button used for controlling the high-voltage switch to be separated and closed, an allowable closing position 8 key switch and an allowable opening position 9 key switch which are used for interlocking, and the electric cabinet 3 is electrically connected with the high-voltage isolating switch device 4.

By adopting the technical scheme, the hidden danger of arc discharge and short circuit accidents when the high-voltage isolating switch is operated under load is effectively avoided by utilizing the mutual interlocking of the two-position key switch 5.

The high-voltage disconnecting switch device 4 comprises a vacuum circuit breaker for controlling and protecting electrical equipment, a high-voltage disconnecting switch for performing an isolating function and a grounding switch for grounding, wherein the vacuum circuit breaker is electrically connected with the high-voltage disconnecting switch, and the high-voltage disconnecting switch is electrically connected with the grounding switch.

By adopting the technical scheme, the purposes of power-off isolation are realized by utilizing the vacuum circuit breaker, the high-voltage isolating switch and the grounding switch.

The invention also provides a using method of the safe operating system, which comprises the following steps: when power failure operation is carried out, the vacuum circuit breaker is opened in a remote operation room, a two-position key switch of an operation table 1 is screwed to a high-voltage forbidden operation position 6, a key is pulled out to a transformer room, inserted into an operation high-voltage isolating switch electric control box 3 and screwed to an allowable opening position 9, at the moment, the load of the vacuum circuit breaker is disconnected, the high-voltage isolating switch can be operated to be opened, and maintenance is carried out;

when power is transmitted, the high-voltage isolating switch is switched on in the transformer room, the two-position key switch for operating the electric cabinet 3 of the high-voltage isolating switch is screwed to the allowable switching-on position 8, the key is taken down and returned to the remote operation room, then the two-position key switch of the device of the operation table 1 is screwed to the high-voltage allowable operation position 7, and normal production is recovered.

By adopting the technical scheme, the mutual interlocking of the two-position key switch 5 is utilized, when the high-voltage isolating switch is operated to be switched off, the two-position key switch of the operating platform 1 must be firstly screwed to the high-voltage forbidden operating position 6, and then the two-position key switch on the electric cabinet 3 is screwed to the allowed switching-off position 9, so that the hidden danger of arc-drawing short circuit accidents when the high-voltage isolating switch is operated with load is effectively avoided

When the vacuum circuit breaker is opened during power failure operation, and the circuit breaker indicator lamp of the operation table 1 is turned on, the key switch is screwed to the high-voltage operation permission position 7 and the high-voltage operation prohibition position 6.

By adopting the technical scheme, the safety and stability of operation are ensured.

When the power failure operation is carried out, the grounding switch is switched on after the high-voltage isolating switch is switched off.

By adopting the technical scheme, the safety is ensured.

When the power is transmitted, the grounding switch is switched off, and then the high-voltage isolating switch is switched on.

By adopting the technical scheme, the safety is ensured.

The implementation principle of the embodiment is as follows: a two-position key switch with self-locking is arranged on an operating platform 1 and an electric cabinet 3, and the switch has two interlocking states of a high-voltage permission operating position 7, a high-voltage prohibition operating position 6, an allowable opening position 9 and an allowable closing position 8 in a transformer room. When the key switch is screwed to the high-voltage allowable operation position 7, the vacuum circuit breaker is allowed to be closed, and the key cannot be pulled out. When the maintenance or the replacement of the electrode needs to be stopped, the vacuum circuit breaker is disconnected, and when the switch is turned to the high-voltage operation forbidding position 6, the key can be pulled out. And the two interlocking signals are connected into a PLC program and are linked with a vacuum circuit breaker closing permission condition program for locking control.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.