Furnace body safety device system of induction melting furnace

Abstract

The utility model discloses a safety device system for a furnace body of an induction melting furnace, which belongs to the technical field of furnace leakage monitoring of the induction melting furnace and comprises a furnace leakage alarm system, the furnace leakage alarm system comprises a stainless steel induction component mounted on the outer side of a furnace lining and a stainless steel detection component led out from the furnace lining and extending into the furnace, the stainless steel induction assembly and the stainless steel detection assembly are connected in series, and a power supply is connected in a series circuit. The system further comprises a cooling water monitoring system, and a quick cut-off valve is arranged on a water inlet pipeline of the cooling water monitoring system. The system further comprises a PLC control system, and the PLC control system is connected with the furnace leakage alarm system and controls opening and closing of the rapid cut-off valve. The safety device system for the furnace body of the induction melting furnace is used for monitoring the furnace lining in real time in the operation process of the induction melting furnace, water supply is stopped in time when abnormity occurs, and the safety of the furnace body is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of induction melting furnace leakage monitoring, in particular to an induction melting furnace body safety device system. Background Art

[0002] The induction melting furnace is mainly composed of the furnace body, variable frequency power supply, control console, capacitor, etc. Among them, the safety risk of the furnace body is very prominent in the operation site of the induction melting furnace, and leakage accidents usually occur in the furnace body. During the smelting process, the high-temperature solution (liquid iron, liquid aluminum, liquid copper, etc.) continuously washes the lining of the furnace body. Once the lining cracks, the high-temperature solution penetrates into the induction coil outside the lining. At this time, if the furnace is not stopped, the high-temperature solution burns the induction coil outside the lining and contacts with the cooling water. If the water supply is not cut off at this time, it is very easy to explode. According to surveys, safety accidents caused by cracking of the lining, leakage, cooling water failure, etc. have occurred frequently in recent years.

[0003] At present, the safety equipment of the induction melting furnace is very lacking. Some domestic melting furnace manufacturers do not equip the complete set of equipment with basic furnace leakage alarm and cooling water monitoring system when they leave the factory. Due to the lack of necessary auxiliary equipment, the perception of the furnace body status during the production process of the induction melting furnace can only rely on experienced operators at the foundry production site to estimate the furnace body status by visual observation and touch.

[0004] Some melting furnace manufacturers’ induction melting furnaces are equipped with a simple furnace leakage alarm system when they leave the factory. However, during long-term melting and use, due to the lack of necessary maintenance, the furnace leakage alarm function is completely lost, and the cooling water monitoring system is also missing.

[0005] In addition, the two systems currently installed on the smelting furnace body, the furnace leakage alarm system and the cooling water detection system, are simple alarm devices. The two systems are independent and there is no interaction between the two. As a result, when the furnace leakage occurs, the cooling water system is unaware that the furnace leakage has occurred and is still supplying water, which directly induces the explosion. Utility Model Content

[0006] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide an induction melting furnace body safety device system, which is used to realize real-time monitoring of the furnace lining during the operation of the induction melting furnace, and to stop water supply in time when an abnormality occurs to ensure the safety of the furnace body.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] Provided is an induction melting furnace body safety device system, comprising a furnace leakage alarm system, the furnace leakage alarm system comprising a stainless steel induction component installed on the outside of the furnace lining, and also comprising a stainless steel detection component led out of the furnace lining and extending into the furnace, the stainless steel induction component and the stainless steel detection component are connected in series, and a power supply is connected in the series circuit;

[0009] It also includes a cooling water monitoring system, wherein a quick shut-off valve is provided on the water inlet pipe of the cooling water monitoring system;

[0010] It also includes a PLC control system, which is connected to the furnace leakage alarm system and controls the opening and closing of the quick cut-off valve.

[0011] Furthermore, the stainless steel sensing component is a non-magnetic stainless steel mesh.

[0012] Furthermore, the stainless steel detection component is a stainless steel nail.

[0013] Furthermore, an ammeter is installed in the series circuit.

[0014] Furthermore, an induction coil is provided on the periphery of the stainless steel induction component.

[0015] Furthermore, it also includes a display system connected to the PLC control system.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The induction melting furnace body safety device system of the utility model example connects the furnace leakage alarm system with the cooling water monitoring system. The furnace leakage alarm system monitors the safety of the induction melting furnace body. After the furnace leakage occurs, the control system controls the quick cut-off valve of the cooling water monitoring system to disconnect, thereby stopping the supply of cooling water to the coil, avoiding the contact between the high-temperature solution and the water, and avoiding the occurrence of explosion;

[0018] 2. The induction melting furnace body safety device system of the utility model example uses a non-magnetic stainless steel mesh as the stainless steel induction component. The non-magnetic stainless steel mesh is not easy to break compared to the stainless steel plate, which improves the stability of the leakage alarm system structure and reduces the construction difficulty and equipment cost. Secondly, the stainless steel mesh is directly in contact with the furnace lining, eliminating the asbestos insulation material and saving costs;

[0019] 3. The induction melting furnace body safety device system of the utility model example uses a stainless steel nail as the first lead-out electrode at the bottom of the furnace. Since the furnace is filled with high-temperature liquid, the stainless steel nail is used as the first electrode. Compared with the use of stainless steel wire, the stainless steel nail is not easily melted, which greatly improves the reliability of the alarm device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the leakage furnace alarm system;

[0022] Figure 2 This is a schematic diagram of the cooling water monitoring system structure.

[0023] In the figure: 1-furnace lining, 2-non-magnetic stainless steel mesh, 3-stainless steel nails, 4-induction coil, 5-quick shut-off valve. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] like Figure 1-2 As shown, this embodiment provides an induction melting furnace body safety device system, including a furnace leakage alarm system and a cooling water monitoring system. The furnace leakage alarm system is used to monitor the safety inside the furnace, and the cooling water monitoring system is used to cut off the water supply pipeline to ensure the safety of the furnace body.

[0027] Specifically, the leakage furnace alarm system includes a stainless steel induction component installed on the outside of the furnace lining 1, and also includes a stainless steel detection component led out from the furnace lining 1 and extended into the furnace. The stainless steel induction component and the stainless steel detection component are connected in series, and a DC power supply is connected in the series circuit. The periphery of the stainless steel induction component is provided with an induction coil 4. In this embodiment, the stainless steel induction component is a non-magnetic stainless steel mesh 2, and the stainless steel detection component is a stainless steel nail 3. In addition, an ammeter is installed on the lead-out line of the furnace bottom motor, and the DC power supply, the non-magnetic stainless steel mesh 2, the metal solution, the stainless steel nail 3, and the ammeter form a series circuit. The state of the furnace lining 1 is judged by collecting the loop current from the furnace bottom probe to the negative pole of the DC power supply. In this embodiment, the original non-magnetic stainless steel plate of the second electrode on the furnace side is optimized and modified. The non-magnetic stainless steel plate is easy to break. The non-magnetic stainless steel plate is replaced with a non-magnetic stainless steel mesh 2, and the traditional non-magnetic stainless steel plate is overlapped with the lead-out line. Instead, it is directly led out by the non-magnetic stainless steel mesh 2, which improves the stability of the alarm system device structure, while reducing the construction difficulty and equipment cost. In addition, the stainless steel mesh is directly in contact with the furnace lining 1, and the asbestos insulation material is eliminated, saving costs. After optimization and transformation, two electrodes are used to form full-coverage continuous contact monitoring. Its function is that when the metal solution penetrates into the induction coil 4, it first contacts the non-magnetic stainless steel mesh 2 before contacting the induction coil 4. When the molten liquid metal charge penetrates through the furnace lining 1 and contacts the non-magnetic stainless steel mesh 2, the first electrode and the second electrode are directly short-circuited, and the loop current is much larger than the leakage furnace and alarm circuit. The equipment immediately alarms and takes corresponding protective actions, thus winning valuable time for subsequent processing.

[0028] The water inlet pipe of the cooling water monitoring system is provided with a quick cut-off valve 5. When a leaking furnace or the like requires manual cutting of the water supply to the induction coil, the system automatically controls the quick cut-off of the water supply to the coil. Specifically, a PLC control system is used to control the operation of the system. The PLC control system is connected to the leaking furnace alarm system and controls the opening and closing of the quick cut-off valve 5. When a leaking furnace accident occurs, the leaking furnace alarm system detects that the loop current increases, and transmits a signal to the PLC control system. The PLC control system controls the quick cut-off valve 5 to close and stop the water supply. In addition, an alarm device can also be added. After the leaking furnace occurs, the PLC control system controls the alarm device to alarm to remind the staff. In this embodiment, the model of the PLC control system is S7-200SMART ST40.

[0029] In addition, the system also includes a display system connected to the PLC control system, the display system displays the current state of the furnace safety system, saves and views historical data and historical alarms. In this embodiment, a touch screen of MCGS brand is selected.

[0030] The induction melting furnace body safety device system of the present embodiment can realize real-time monitoring of the furnace lining 1, and when a furnace leak occurs, the water supply can be stopped in time to ensure the safety of the furnace body.

[0031] Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An induction melting furnace body safety device system, characterized in that: The invention comprises a furnace leakage alarm system, the furnace leakage alarm system comprises a stainless steel induction component installed on the outside of a furnace lining (1), and also comprises a stainless steel detection component led out from the furnace lining (1) and extending into the furnace, the stainless steel induction component and the stainless steel detection component are connected in series, and a power supply is connected in the series circuit; It also includes a cooling water monitoring system, wherein a quick shut-off valve (5) is provided on the water inlet pipe of the cooling water monitoring system; It also comprises a PLC control system, which is connected to the furnace leakage alarm system and controls the opening and closing of the quick cut-off valve (5).

2. The induction melting furnace body safety device system according to claim 1, characterized in that: The stainless steel sensing component is a non-magnetic stainless steel mesh (2).

3. The induction melting furnace body safety device system according to claim 1, characterized in that: The stainless steel detection component is a stainless steel nail (3).

4. The induction melting furnace body safety device system according to claim 1, characterized in that: An ammeter is also installed in the series circuit.

5. The induction melting furnace body safety device system according to claim 1, characterized in that: An induction coil (4) is arranged on the periphery of the stainless steel induction component.

6. The induction melting furnace body safety device system according to claim 1, characterized in that: It also includes a display system connected to the PLC control system.

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