Device for improving high-voltage interlocking safety system

Abstract

The utility model discloses a device for improving a high-voltage interlocking safety system, which comprises a power supply circuit used for providing power support, a control circuit used for realizing control logic and an electromagnetic lock circuit used for executing locking action, when high-voltage power transmission is carried out, a contactor KM1 is electrified and closed, a series of interlocking reactions enable an electromagnetic lock to be electrified and closed, and the electromagnetic lock is locked. The LF furnace electrode gate locking device can firmly lock an electrode gate of an LF furnace, so that the possibility that an operator mistakenly enters a dangerous area when high voltage is not powered off due to unsmooth communication, misoperation of electrical personnel and the like is fundamentally eradicated, the personnel safety in the operation process is greatly improved, serious accidents such as electric shock are avoided, and when high voltage is powered off, the contactor KM1 is powered off and disconnected, and the safety of the LF furnace is ensured. And the intermediate relay KA1 is powered off, the electromagnetic lock is powered off and unlocked, and the electrode gate is opened, so that an operator can conveniently and timely enter an electrode operation table to perform butt joint operation. The accurate power-off unlocking logic ensures that the electrode gate can be opened only under the condition that the high-voltage power is really cut off and is safe.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the steel metallurgical industry technical field, concretely relates to a device for improving high pressure interlock safety system. BACKGROUND

[0002] The LF furnace is a commonly used equipment in the steel metallurgical industry, and its full name is Ladle Furnace. In the production process of the LF furnace, the operator needs to perform butt joint operation on the electrode during the production interval. However, when the operator enters the electrode operation platform, it is difficult to effectively determine whether the high-voltage live equipment has been de-energized due to poor communication or electrical personnel operation problems, and occasionally there may be incomplete de-energization, which poses a significant safety hazard to the operator when connecting the electrode. Moreover, since the LF furnace is in the production process interval, the operator will perform butt joint operation on the electrode. When the operator enters the electrode operation platform, the high-voltage live equipment cannot be effectively confirmed to be de-energized due to communication problems or electrical personnel operation reasons, and occasionally incomplete de-energization may occur, resulting in a significant safety hazard to the operator when connecting the electrode. SUMMARY

[0003] The purpose of the utility model is to provide a device for improving the high-voltage interlock safety system to solve the problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a device for improving the high-voltage interlock safety system, comprising a power supply circuit for providing power support, a control circuit for implementing control logic, and an electromagnetic lock circuit for executing locking action, the power supply circuit supplies power to the electromagnetic lock circuit, the power supply circuit includes a live wire L and a neutral wire N, and the control circuit and the electromagnetic lock circuit are electrically connected between the power supply circuit.

[0005] Preferably, the control circuit includes a contactor KM1 and an intermediate relay KA1, one end of the coil of the contactor KM1 is connected to the live wire L, and the other end is connected to the neutral wire N, the normally open contact of the contactor KM1 is connected between the live wire L and the neutral wire N after being connected in series with the coil of the intermediate relay KA1, when the high-voltage state changes, the control circuit can respond quickly and accurately transmit the signal to the electromagnetic lock circuit, thereby achieving precise control of the electromagnetic lock and effectively avoiding safety risks caused by misjudgment of the high-voltage state.

[0006] Preferably, the electromagnetic lock circuit includes the normally open contact of the intermediate relay KA1 and the electromagnetic lock, and the normally open contact of the intermediate relay KA1 is connected across the 24V power supply after being connected in series with the electromagnetic lock, allowing the operator to enter the operation area under high-voltage de-energization and safe conditions. This design ensures that the electromagnetic lock can accurately perform locking and unlocking actions according to the high-voltage state, providing reliable safety protection for the operator.

[0007] Preferably, when the contactor KM1 is powered and attracted, the normally open contact of the contactor KM1 is closed, the intermediate relay KA1 is powered, the normally open contact of the intermediate relay KA1 is closed, and the electromagnetic lock is powered and attracted, thereby fundamentally eliminating the possibility of the operator entering the dangerous area when the high voltage is not powered off due to misoperation or other reasons, and greatly improving the operation safety.

[0008] Preferably, when the contactor KM1 is powered and attracted, the normally open contact of the contactor KM1 is closed, the intermediate relay KA1 is powered, the normally open contact of the intermediate relay KA1 is closed, and the electromagnetic lock is powered and attracted, thereby fundamentally eliminating the possibility of the operator entering the dangerous area when the high voltage is not powered off due to misoperation or other reasons, and greatly improving the operation safety.

[0009] Preferably, the electromagnetic lock is installed on the electrode door of the LF furnace, and the electromagnetic lock is used to lock the electrode door to prevent the electrode door from being opened when the high voltage is powered on, and the electrode door is opened when the high voltage is powered off.

[0010] Compared with the prior art, the technical effects and advantages of the device for improving the high-voltage interlocking safety system are that,

[0011] The device for improving the high-voltage interlocking safety system has the advantages that the unique circuit design effectively solves the safety hazards faced by the operator in the LF furnace operation. The contactor KM1 and the intermediate relay KA1 in the control circuit cooperate with each other, can sensitively perceive the high-voltage state change, and rapidly and accurately transmit the signal to the electromagnetic lock circuit. When the high voltage is powered on, the contactor KM1 is powered and attracted, a series of interlocking reactions make the electromagnetic lock powered and attracted, and the electrode door of the LF furnace is firmly locked, thereby fundamentally eliminating the possibility of the operator mistakenly entering the dangerous area when the high voltage is not powered off due to poor communication, misoperation of electricians and other reasons, greatly improving the safety of the operator during the operation process, and avoiding the occurrence of serious accidents such as electric shock.

[0012] When the high voltage is powered off, the contactor KM1 is powered off and disconnected, the intermediate relay KA1 is powered off, the electromagnetic lock is powered off and unlocked, and the electrode door is opened, thereby facilitating the operator to enter the electrode operation platform for docking operation. The accurate power-off unlocking logic not only ensures that the electrode door is opened only when the high voltage is truly powered off and safe, but also avoids the interference of the abnormal locking of the electromagnetic lock on the normal production operation, thereby guaranteeing the continuity of the LF furnace production process. Meanwhile, the electromagnetic lock is accurately installed at the key position of the electrode door, directly protects the operator entering the electrode operation area, does not affect the normal production process, and provides a reliable safety barrier at the critical moment, thereby achieving the organic balance between safety and production. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The device circuit diagram for improving the high-voltage interlocking safety system of the utility model device. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0015] Please refer to Figure 1 The utility model provides a technical scheme: a device for improving the high-voltage interlocking safety system, including the power supply circuit for providing power support, the control circuit 2 for realizing control logic and the electromagnetic lock circuit for executing locking action, the power supply circuit is the power supply for electromagnetic lock circuit, the power supply circuit includes fire line L and zero line N, and the power supply circuit is like the "energy hub" of the whole system, stably supplies power for the electromagnetic lock circuit, ensures that each part of the system can normally operate. The power transmission channel constructed through the fire line L and the zero line N provides the necessary electric energy basis for the control circuit and the electromagnetic lock circuit, so that the whole high-voltage interlocking safety system can orderly run, and the control circuit 2 and the electromagnetic lock circuit are electrically connected with the power supply circuit.

[0016] The control circuit 1 contains the contactor KM1 and the intermediate relay KA1, one end of the coil of the contactor KM1 is connected with the fire line L, the other end is connected with the zero line N, the normally open contact of the contactor KM1 is connected between the fire line L and the zero line N after being connected with the coil of the intermediate relay KA1 in series, when high-voltage power transmission, the current passes through the fire line L and the zero line N to supply power for the coil of the contactor KM1, so that it is electrified and attracted. At this time, the normally open contact of the contactor KM1 is closed, and this closed state is like a "switch" of control signal transmission, which connects the circuit for the coil of the intermediate relay KA1. The coil of the intermediate relay KA1 is connected between the fire line L and the zero line N in series with the normally open contact of the contactor KM1, after the normally open contact of the contactor KM1 is closed, the intermediate relay KA1 is electrified, and then the signal is relayed and amplified. The advantage of this design is that it can accurately convert the state change of the high-voltage circuit into a signal that can control the electromagnetic lock circuit, improve the sensitivity and accuracy of the system response to the high-voltage state, and effectively avoid the safety risk caused by misjudgment of the high-voltage state. For example, in the complex steel smelting production environment, there are many disturbances caused by various electrical equipment operation, and this accurate control logic can ensure that even in the interference situation, the electromagnetic lock can be accurately controlled according to the high-voltage state, and the safety of the operator is guaranteed.

[0017] The electromagnetic lock circuit comprises the normally open contact of the intermediate relay KA1 and the electromagnetic lock, and the normally open contact of the intermediate relay KA1 is connected in series with the electromagnetic lock across the 24V power supply. When the intermediate relay KA1 is powered on, its normally open contact is closed, the electromagnetic lock is connected to the 24V power supply, and then powered on to generate a strong magnetic force to lock the electrode door. When the intermediate relay KA1 is powered off, the normally open contact is opened, the electromagnetic lock is powered off, the magnetic force disappears, and the electrode door is unlocked. Such a design ensures that the electromagnetic lock can accurately perform the locking and unlocking actions according to the high-voltage state. When the high-voltage power is on, the electromagnetic lock firmly locks the electrode door, forming a reliable physical barrier to prevent operators from entering the electrode operating area in the dangerous situation of high-voltage electrification, avoiding electric shock and other serious safety accidents, and providing reliable safety protection for operators. After the high-voltage power is off, the electromagnetic lock is unlocked in time, without hindering normal production operations, ensuring that the electrode butt joint operation in the LF furnace production process can be carried out smoothly.

[0018] When the contact KM1 is powered on and attracted, the normally open contact is closed, the intermediate relay KA1 is powered on, the normally open contact of the intermediate relay KA1 is closed, and the electromagnetic lock is powered on and attracted. When the contact KM1 is powered on and attracted, its normally open contact is closed, which makes the intermediate relay KA1 powered on. After the intermediate relay KA1 is powered on, its normally open contact is also closed, and then the electromagnetic lock is powered on and attracted. This series of rigorous action process fundamentally eliminates the possibility of operators entering the dangerous area due to misoperation or other reasons when the high-voltage is not powered off. In actual production, operators may misjudge and enter the electrode operating area due to various reasons when the high-voltage is not completely cut off, and this working logic of the device will firmly prevent personnel from entering as long as the high-voltage is not powered off, greatly improving the operation safety.

[0019] When the contact KM1 is powered off and disconnected, the intermediate relay KA1 is powered off, the normally open contact of the intermediate relay KA1 is opened, and the electromagnetic lock is powered off. When the contact KM1 is powered off and disconnected, the intermediate relay KA1 is also powered off. After the intermediate relay KA1 is powered off, its normally open contact is quickly opened, thereby cutting off the connection between the electromagnetic lock and the 24V power supply, the electromagnetic lock is powered off, the locking force disappears, and the electrode door is unlocked. This power-off and disconnection logic is also rigorous, ensuring that the electrode door can be unlocked in time after the high-voltage is powered off, facilitating operators to enter and work. At the same time, it also avoids the situation that the normal production operation is affected due to abnormal locking of the electromagnetic lock. For example, in the steel and metallurgical industry with a tense production rhythm, every second of production time is crucial. If the electromagnetic lock cannot be unlocked in time after the high-voltage is powered off, the production schedule will be delayed, increasing the production cost. This logical design of the device solves this problem well, ensuring the efficient production.

[0020] The electromagnetic lock is installed at the electrode door of the LF furnace, and is used for locking the electrode door to prevent the electrode door from being opened when high voltage is supplied, and to open the electrode door when high voltage is disconnected. The electromagnetic lock is precisely installed at the key position of the electrode door of the LF furnace, and directly protects the core link of the operator entering the electrode operation area. The precise positioning installation has the benefit of setting up a safety defense line closest to the danger source, thereby maximizing the safety of the operator. Meanwhile, without affecting the normal production process of the LF furnace, the operator is provided with clear safety instructions, i.e. as long as the electrode door is in the locked state, it indicates that the high voltage is on, and entering is strictly prohibited; and when the electrode door is unlocked, it indicates that the high voltage is disconnected, and it is safe to enter the work. This intuitive and reliable safety protection method provides a simple and effective safety protection measure for the operator in the complex production environment of the steel metallurgy industry.

[0021] Specifically, in use, the power supply circuit provides power for the entire system through the live wire L and the neutral wire N, which is the energy basis for the system operation. The electromagnetic lock circuit is powered to ensure that it has the required power for work. The contactor KM1 and the intermediate relay KA1 in the control circuit cooperate to realize the control logic. When high voltage is supplied, the current through the live wire L and the neutral wire N makes the contactor KM1 coil energized and attracted, and its normally open contact is closed to connect the intermediate relay KA1 coil circuit. After KA1 is powered, it relays and amplifies the signal, and accurately converts the high voltage circuit state change into a signal for controlling the electromagnetic lock circuit. In the electromagnetic lock circuit 3, the intermediate relay KA1 normally open contact is connected in series with the electromagnetic lock across the 24V power supply.

[0022] When KA1 is powered, the normally open contact is closed, the electromagnetic lock is powered to generate magnetic force to lock the LF furnace electrode door to prevent the operator from entering when the high voltage is on. When KA1 is de-energized, the normally open contact is open, the electromagnetic lock is de-energized, and the electrode door is unlocked to allow the operator to enter the work after the high voltage is disconnected. The entire device automatically and accurately controls the locking and unlocking of the electromagnetic lock to the electrode door according to the high voltage supply or disconnection state through the close cooperation between the power supply circuit, the control circuit and the electromagnetic lock circuit, thereby ensuring the smooth production of the LF furnace while protecting the safety of the operator.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An apparatus for improving a high-voltage interlocking safety system, comprising a power supply circuit for providing power support, a control circuit for implementing control logic, and an electromagnetic lock circuit for performing a locking action, characterized in that: The power supply circuit supplies power for the electromagnetic lock circuit, the power supply circuit includes a live wire L and a zero wire N, and the control circuit and the electromagnetic lock circuit are electrically connected with the power supply circuit.

2. The apparatus for improving a high pressure interlock safety system of claim 1, wherein: The control circuit includes a contactor KM1 and an intermediate relay KA1, one end of the coil of the contactor KM1 is connected with the live wire L, the other end is connected with the zero wire N, and the normally open contact of the contactor KM1 is connected between the live wire L and the zero wire N after being connected with the coil of the intermediate relay KA1 in series.

3. The apparatus for improving a high pressure interlock safety system of claim 1, wherein: The electromagnetic lock circuit includes the normally open contact of the intermediate relay KA1 and the electromagnetic lock, and the normally open contact of the intermediate relay KA1 is connected across the 24V power supply after being connected with the electromagnetic lock in series.

4. The apparatus for improving a high pressure interlock safety system of claim 2, wherein: When the contactor KM1 is energized and attracted, the normally open contact is closed, the intermediate relay KA1 is energized, the normally open contact of the intermediate relay KA1 is closed, and the electromagnetic lock is energized and attracted.

5. The apparatus for improving a high pressure interlock safety system of claim 4, wherein: When the contactor KM1 is de-energized and disconnected, the intermediate relay KA1 is de-energized, the normally open contact of the intermediate relay KA1 is disconnected, and the electromagnetic lock is de-energized.

6. The apparatus for improving a high pressure interlock safety system of claim 5, wherein: The electromagnetic lock is installed on the electrode door of the LF furnace, and is used for locking the electrode door so that the electrode door cannot be opened when high-voltage power is supplied, and the electrode door is opened when high-voltage power is cut off.

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