Real-time monitoring and interlocking control system of intermediate frequency furnace cooling system

Abstract

The utility model provides a real-time monitoring and interlocking control system of a cooling system of an intermediate frequency furnace, and aims to provide a solution capable of real-time monitoring and interlocking control for the cooling system during operation of the intermediate frequency furnace. The device mainly comprises a quick cut-off device arranged at a main water inlet pipe of each intermediate frequency furnace induction coil, a plurality of detection elements arranged on a cooling water path of the intermediate frequency furnace induction coil, a control cabinet and an alarm system in signal connection with the control cabinet, and an output signal of the alarm system is interlocked and controlled at a heating power supply end of the intermediate frequency furnace through the control cabinet. The detection piece is arranged on an original cooling water system, real-time monitoring is achieved through the control cabinet, when a set threshold value is exceeded, the alarm system gives out a sound-light alarm, and the control cabinet can output an inversion stop signal to a corresponding furnace body control signal node and cut off a heating power source of the intermediate frequency furnace in a linkage mode. Therefore, major safety accidents such as splashing and leakage of high-temperature molten metal are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medium frequency furnaces, in particular to a real-time monitoring and interlocking control system for a cooling system of a medium frequency furnace. Background Art

[0002] During the smelting, lifting and casting of molten metal in the medium frequency furnace, accidents such as splashing and leakage of high-temperature molten metal are prone to occur. If there are meeting rooms, activity rooms, lounges and other places where people gather in the area, once molten metal leaks, it will lead to large-scale accidents with mass casualties. The specific manifestations of inducing accidents are aging, cracking and breaking of the induction coil of the medium frequency furnace, and the cooling water will wash the furnace lining, causing the cooling water to flow into the medium frequency furnace, causing the molten metal to explode when it encounters water; or, the induction coil of the medium frequency furnace is blocked, resulting in the induction coil being cut off from water, which will cause the induction coil to burn through. If the furnace lining is not protected by cooling water for a long time, it will cause the furnace lining to burn through and cause the furnace to burn through; and the cooling water pressure of the medium frequency induction coil is reduced or the water pipe is blocked, causing the return water temperature to be too high. In severe cases, steam will be generated, and the steam will break through the water pipe joints and burn the maintenance personnel, and it may also cause serious equipment safety accidents such as melting of the copper tube of the local coil. Therefore, a solution that can monitor and interlock control in real time is needed for the cooling system of the medium frequency furnace during operation. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned prior art, the present application provides a real-time monitoring and interlocking control system for the cooling system of a medium frequency furnace. By configuring multiple detection components on the cooling water system, the PLC control cabinet monitors in real time. When the set threshold is exceeded, the alarm system emits an audible and visual alarm, and the relevant alarm information flashes on the screen. At the same time, it can output an inverter stop signal to the corresponding furnace control signal node and jointly cut off the heating power supply of the medium frequency furnace.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A real-time monitoring and interlocking control system for a medium frequency furnace cooling system comprises a quick cut-off device arranged at the main water inlet pipe of each medium frequency furnace induction coil, a plurality of detection elements arranged on the cooling water path of the medium frequency furnace induction coil, a control cabinet arranged in an electric furnace operating room, and an alarm system whose signal is connected to the control cabinet, wherein the output signal of the alarm system is also interlocked and controlled to the heating power supply end of the medium frequency furnace through the control cabinet.

[0006] Furthermore, the detection element includes a pressure sensor, an inlet and outlet water flow meter, and a temperature sensor.

[0007] Furthermore, the pressure sensor is arranged on the main water inlet pipe and the main water outlet pipe of the medium frequency furnace induction coil or the furnace body, the inlet and outlet water flow meters are arranged on the main water inlet pipe and the main water outlet pipe of the medium frequency furnace induction coil, and the temperature sensor is arranged on the main water inlet pipe and the main water outlet pipe of the medium frequency furnace induction coil.

[0008] Furthermore, the quick-cutting device is an electric butterfly valve, and the electric butterfly valve signal is connected to the control cabinet.

[0009] Furthermore, a signal controller of the electric butterfly valve is arranged on the furnace table.

[0010] Furthermore, the alarm system is equipped with an uninterruptible power supply.

[0011] The beneficial effects of the utility model are as follows:

[0012] Compared with the prior art, the utility model is based on the original medium frequency furnace cooling water system, and at least three sensors including a pressure sensor, an inlet and outlet water flow meter and a temperature sensor are installed on the furnace body water inlet and outlet main pipes, and a PLC control cabinet with a touch screen is installed in the electric furnace operation room. The control cabinet monitors the data of the cooling water system and displays it dynamically in real time. When the set threshold is exceeded, the alarm of the alarm system sends out an audible and visual alarm, and the relevant alarm information flashes on the screen. At the same time, the inverter stop signal can be output to the corresponding furnace body control signal node, thereby realizing the monitoring, display and alarm functions of the above parameters. At the same time, the heating power supply of the medium frequency furnace is interlocked and controlled to achieve linkage cutting, thereby further enhancing the safety factor during the operation of the medium frequency furnace and avoiding major safety accidents such as splashing and leakage of high-temperature molten metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of a control system based on two furnaces, furnace body A and furnace body B, of the utility model;

[0014] Figure 2 This is a schematic diagram of a control system based on three furnaces, namely furnace body A, furnace body B and furnace body C, of ​​the utility model.

[0015] Among them: 1. Electric butterfly valve; 2. Detection element; 3. Control cabinet; 4. Main water inlet pipe; 5. Main water outlet pipe; 6. Water pump; 7. Water inlet distributor; 8. Return water distributor. DETAILED DESCRIPTION

[0016] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0017] The utility model provides a real-time monitoring and interlocking control system for a medium frequency furnace cooling system, aiming to propose a solution capable of real-time monitoring and interlocking control for the cooling system of the medium frequency furnace during operation.

[0018] like Figure 1 and Figure 2 As shown, the existing intermediate frequency furnace cooling water system constructs a circulating water system through a main water inlet pipe 4 and a main water outlet pipe 5 on the side of the intermediate frequency furnace body, and a water inlet distributor 7 and a return water distributor 8 are also configured on the main water inlet pipe 4 or the main water outlet pipe 5, and the water system is driven by a water pump 6. The utility model includes a quick cut-off device arranged at the main water inlet pipe 4 of each intermediate frequency furnace induction coil, a plurality of detection elements 2 arranged on the cooling water path of the intermediate frequency furnace induction coil, a control cabinet 3 arranged in the electric furnace operation room, and an alarm system whose signal is connected to the control cabinet 3, and the output signal of the alarm system is also interlocked and controlled to the heating power supply end of the intermediate frequency furnace through the control cabinet 3.

[0019] In some embodiments, the detection element 2 includes a pressure sensor, an inlet and outlet water flow meter, and a temperature sensor.

[0020] In some embodiments, a detection element 2 needs to be configured on the cooling water system of each medium frequency furnace, wherein a pressure sensor is arranged on the main water inlet pipe 4 and the main water outlet pipe 5 of the medium frequency furnace induction coil or the furnace body, an inlet and outlet water flow meter is arranged on the main water inlet pipe 4 and the main water outlet pipe 5 of the medium frequency furnace induction coil, and a temperature sensor is arranged on the main water inlet pipe 4 and the main water outlet pipe 5 of the medium frequency furnace induction coil.

[0021] In some embodiments, the quick-cut device can be manual or automatic, but the control point should be set on the furnace table. The preferred quick-cut device in this embodiment is an electric butterfly valve 1, the signal of the electric butterfly valve 1 is connected to the control cabinet 3, and the signal controller of the electric butterfly valve 1 is set on the furnace table.

[0022] Through the above technical solution, after the alarm system sends out an alarm, the staff at the furnace platform can immediately cut off the electric butterfly valve 1 on the water path of the medium frequency furnace through the signal controller.

[0023] In some embodiments, the alarm system is configured with an uninterruptible power supply.

[0024] Through the above technical solution, the alarm system is equipped with an uninterruptible power supply, and can continue to send out alarm signals even when the working power supply is cut off.

[0025] The working principle of this utility model:

[0026] A quick cut-off device is set on the main water inlet pipe 4 of the induction coil of the medium frequency furnace, and the control point is set on the furnace platform. Three groups of detection elements 2 are set on the main water inlet pipe 4 and the main water outlet pipe 5 of the cooling water path of the induction coil of the medium frequency furnace, which are used to monitor the water inlet pressure, the difference in water inlet and outlet flow, and the water outlet temperature of each circuit. The monitoring data signal is transmitted to the control cabinet 3. In this embodiment, the control cabinet 3 is preferably Siemens SMART200 PLC and touch screen; at the same time, the alarm signal is interlocked with the heating power supply of the medium frequency furnace, and the alarm signal is set on the furnace platform. The alarm system is equipped with an uninterruptible power supply, which can operate effectively.

[0027] Specifically, the medium frequency furnace induction coil water inlet pipe quick cut-off device can be manual or automatic, but the control point should be set on the furnace platform. The pressure sensor is set on the main water inlet pipe 4 and the main water outlet pipe 5 of the medium frequency furnace induction coil or the furnace body, the inlet and outlet water flow meter is set on the main water inlet pipe 4 and the main water outlet pipe 5 of the medium frequency furnace induction coil, and the temperature sensor is set on the main water inlet pipe 4 and the main water outlet pipe 5 of the medium frequency furnace induction coil.

[0028] At the same time, the above three groups of detection elements 2 should be interlocked with the intermediate frequency furnace heating power supply through the control cabinet 3. Once an alarm is triggered, the intermediate frequency furnace heating power supply (not all power supplies) must be cut off. In particular, since the production operations are basically carried out on the furnace platform, the alarm signals of the inlet water pressure of the induction coil, the difference in inlet and outlet water flow, and the outlet water temperature of each circuit of the induction coil should be set on the furnace platform, and the alarm cannot be set only under the furnace.

[0029] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A real-time monitoring and interlocking control system for a medium frequency furnace cooling system, characterized in that: The invention comprises a quick cut-off device arranged at the main water inlet pipe (4) of each medium frequency furnace induction coil, a plurality of detection elements (2) arranged on the cooling water path of the medium frequency furnace induction coil, a control cabinet (3) arranged in the electric furnace operation room, and an alarm system whose signal is connected to the control cabinet (3); the output signal of the alarm system is also interlocked and controlled to the heating power supply end of the medium frequency furnace through the control cabinet (3).

2. A real-time monitoring and interlocking control system for a medium frequency furnace cooling system as claimed in claim 1, characterized in that: The detection element (2) comprises a pressure sensor, an inlet and outlet water flow meter and a temperature sensor.

3. A real-time monitoring and interlocking control system for a medium frequency furnace cooling system as claimed in claim 2, characterized in that: The pressure sensor is arranged on the main water inlet pipe (4) and the main water outlet pipe (5) of the medium frequency furnace induction coil or the furnace body, the water inlet and outlet flow meters are arranged on the main water inlet pipe (4) and the main water outlet pipe (5) of the medium frequency furnace induction coil, and the temperature sensor is arranged on the main water inlet pipe (4) and the main water outlet pipe (5) of the medium frequency furnace induction coil.

4. A real-time monitoring and interlocking control system for a medium frequency furnace cooling system as claimed in claim 1, characterized in that: The quick-cut device is an electric butterfly valve (1), and the electric butterfly valve (1) is signal-connected to the control cabinet (3).

5. A real-time monitoring and interlocking control system for a medium frequency furnace cooling system as claimed in claim 4, characterized in that: The signal controller of the electric butterfly valve (1) is arranged on the furnace table.

6. A real-time monitoring and interlocking control system for a medium frequency furnace cooling system as claimed in claim 1, characterized in that: The alarm system is equipped with an uninterruptible power supply.

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