Water cooling system of medium-frequency electric furnace

Abstract

The utility model relates to the technical field of cooling systems, in particular to a medium-frequency electric furnace water cooling system which comprises a medium-frequency electric furnace, a first cooling device, a second cooling device, a water tank and a cooling water pipe. The cooling water pipe is hermetically connected with the first cooling device, the second cooling device and the water tank to form the closed cooling loop, so that cooling water for cooling the medium-frequency electric furnace is closed in the circulating process, the cooling water cannot leak or evaporate, water resources are fully utilized, and waste of the water resources is avoided; besides, the first cooling device and the second cooling device are provided with heat exchange mechanisms, compressors, condensers and pressure reducers which are sequentially connected, cooling water circularly flows to rapidly absorb and release heat, a plurality of cooling fins are arranged on a cooling water pipe and have large contact area with the cooling water pipe, heat in the cooling water is guided out, and the cooling effect of the cooling water is improved. And the effect of efficiently and circularly cooling the medium-frequency electric furnace is achieved.

Description

Technical Field

[0001] This utility model relates to the field of cooling system technology, specifically a water cooling system for a medium-frequency electric furnace. Background Technology

[0002] An intermediate frequency electric furnace is a power supply device that converts 50Hz AC power into intermediate frequency power ranging from 300Hz to 10000Hz. It rectifies three-phase AC power into DC power, then converts the DC power into adjustable intermediate frequency current, supplying this current to the capacitors and induction coils. This generates high-density magnetic lines of force in the induction coil, cutting through the metal material inside and creating large eddy currents. Due to the thermal effect of the current, operating under high current conditions inevitably generates heat, causing a temperature rise. In an intermediate frequency electric furnace, components carrying high current, such as the induction coil, magnetic yoke, cables, and power cabinet, all require cooling. Failure to cool them in time will not only affect the equipment's performance and power but may even burn out the equipment.

[0003] Water cooling systems are crucial for cooling medium-frequency induction furnaces and ensuring their safe operation. Because the internal temperature of a medium-frequency induction furnace is very high, and heat can only be dissipated through its shell, which has very low heat dissipation efficiency, the production workshop experiences high temperatures, resulting in a poor working environment for workers. A common existing water cooling structure for medium-frequency induction furnaces involves a ring-shaped water pipe outside the furnace body spraying cooling water onto the furnace shell. However, this continuous spraying of cooling water onto the furnace surface leads to significant water waste, and the limited effective cooling area results in inadequate cooling performance. Utility Model Content

[0004] The purpose of this invention is to provide a water-cooling system for a medium-frequency electric furnace to overcome the problems existing in the current equipment.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a medium-frequency electric furnace water cooling system, including a medium-frequency electric furnace, a cooling device, a water tank, and cooling water pipes. The cooling device is used to cool the cooling water and includes a first cooling device and a second cooling device. The cooling water pipes are sealed and connected to the first cooling device, the second cooling device, and the water tank to form a closed cooling circuit. The cooling water pipes are provided with multiple heat dissipation fins. The first cooling device and the second cooling device have the same structure, both including a heat exchange mechanism, a compressor, a condenser, and a pressure reducer that are connected in sequence to form a closed circuit through pipelines. The heat exchange mechanism includes a first refrigerant tank, a second refrigerant tank, a cooling tank located between the first refrigerant tank and the second refrigerant tank, and multiple refrigerant pipes that pass through the cooling tank and are respectively connected at both ends to the first refrigerant tank and the second refrigerant tank.

[0006] Based on the above technical solution, the present invention can be further improved as follows:

[0007] As a further improvement to the above technical solution, the cooling water pipe includes a first cooling water outlet pipe, a second cooling water outlet pipe, a first cooling water inlet pipe, and a second cooling water inlet pipe. The first cooling water outlet pipe is connected between the medium-frequency electric furnace and the first cooling device. The second cooling water outlet pipe is connected between the first cooling device and the water tank. The first cooling water inlet pipe is connected between the water tank and the second cooling device. The second cooling water inlet pipe is connected between the second cooling device and the medium-frequency electric furnace. Multiple heat dissipation fins are fitted on the first cooling water outlet pipe, the second cooling water outlet pipe, the first cooling water inlet pipe, and the second cooling water inlet pipe.

[0008] As a further improvement to the above technical solution, the water tank is filled with cooling water, and both the first cooling device and the second cooling device are provided with cooling water inlet and cooling water outlet. A first water pump is connected between the cooling water outlet of the first cooling device and one end of the second cooling water outlet pipe, and a second water pump is connected between the cooling water inlet of the second cooling device and one end of the first cooling water inlet pipe.

[0009] As a further improvement to the above technical solution, multiple first cooling water outlet pipes and multiple second cooling water inlet pipes are provided. Inlet / outlet adapters are connected between the multiple first cooling water outlet pipes and the cooling water inlet of the first cooling device, and between the multiple second cooling water inlet pipes and the cooling water outlet of the second cooling device. The inlet / outlet adapters are stainless steel pipes, including branch pipes and manifolds. The branch pipes are connected to the multiple first cooling water outlet pipes or the second cooling water inlet pipes, and the manifolds are connected to the cooling water inlet of the first cooling device or the cooling water outlet of the second cooling device.

[0010] As a further improvement to the above technical solution, the first refrigerant tank is provided with an evaporation chamber, and the second refrigerant tank is provided with a condensation chamber. The evaporation chamber contains gaseous refrigerant, and the condensation chamber contains liquid refrigerant. The cooling tank is provided with a cooling chamber, and the cooling water inlet and outlet are located on opposite sides of the cooling tank and connected to the cooling chamber. The evaporation chamber and the condensation chamber are connected by multiple refrigerant pipes. The condensation chamber is connected to the pressure reducer through a pipe, the evaporation chamber is connected to the compressor through a pipe, and the condenser is connected between the compressor and the pressure reducer through a pipe.

[0011] As a further improvement to the above technical solution, the cooling box is provided with multiple heat sinks, and multiple refrigerant pipes pass through the multiple heat sinks. The refrigerant pipes and cooling water pipes are copper pipes, and the heat sinks are aluminum or copper sheets.

[0012] As a further improvement to the above technical solution, the first water pump, the second water pump, the compressor, the condenser, and the pressure reducer are all electrically connected to the PLC controller.

[0013] As a further improvement to the above technical solution, a temperature sensor is provided at the outlet of the water tank. The temperature sensor is used to detect the temperature of the cooling water flowing out of the water tank and is electrically connected to the PLC controller.

[0014] The beneficial effects of this utility model are as follows: By sealing the cooling water pipes with the first cooling device, the second cooling device, and the water tank to form a closed cooling circuit, the cooling water used to cool the medium-frequency electric furnace is closed during the circulation process. This prevents leakage and evaporation of the cooling water, making full use of water resources and avoiding waste. In addition, the first and second cooling devices are equipped with a heat exchange mechanism, a compressor, a condenser, and a pressure reducer connected in sequence, which allows the cooling water to quickly absorb and release heat during circulation. Furthermore, the cooling water pipes are equipped with multiple heat dissipation fins, which have a large contact area with the cooling water pipes, thus dissipating the heat from the cooling water and achieving a highly efficient circulating cooling effect for the medium-frequency electric furnace. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of the water-cooling system for a medium-frequency electric furnace provided in a preferred embodiment of this utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the first and second cooling devices in the process;

[0018] Figure 3 yes Figure 2 A schematic diagram of the inlet / outlet water adapter in the middle;

[0019] In the diagram: 1. Medium-frequency electric furnace; 2. First cooling device; 21. Heat exchange mechanism; 210. Heat sink; 211. First refrigerant tank; 2110. Evaporation chamber; 212. Second refrigerant tank; 2120. Condensation chamber; 213. Cooling box; 2130. Cooling chamber; 214. Refrigerant pipe; 22. Compressor; 23. Condenser; 24. Pressure reducer; 3. Second cooling device; 4. Water tank; 51. First cooling water outlet pipe; 52. Second cooling water outlet pipe; 53. First cooling water inlet pipe; 54. Second cooling water inlet pipe; 55. Heat sink fins; 56. Inlet / outlet water adapter; 561. Water distribution pipe; 562. Manifold; 6. First water pump; 7. Second water pump; 8. Temperature sensor. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, a preferred embodiment of the present invention provides a medium-frequency electric furnace water cooling system, including a medium-frequency electric furnace 1, a cooling device, a water tank 4, and cooling water pipes. The cooling device is used to cool the cooling water and includes a first cooling device 2 and a second cooling device 3. The cooling water pipes are sealed to the first cooling device 2, the second cooling device 3, and the water tank 4 to form a closed cooling circuit. The cooling water pipes are provided with multiple heat dissipation fins 55. The first cooling device 2 and the second cooling device 3 have the same structure, both including a heat exchange mechanism 21, a compressor 22, a condenser 23, and a pressure reducer 24 that are connected in sequence to form a closed circuit through pipelines. The heat exchange mechanism 21 includes a first refrigerant tank 211, a second refrigerant tank 212, a cooling box 213 located between the first refrigerant tank 211 and the second refrigerant tank 212, and multiple refrigerant pipes 214 that pass through the cooling box 213 and are respectively connected at both ends to the first refrigerant tank 211 and the second refrigerant tank 212.

[0024] Furthermore, the cooling water pipes include a first cooling water outlet pipe 51, a second cooling water outlet pipe 52, a first cooling water inlet pipe 53, and a second cooling water inlet pipe 54. The first cooling water outlet pipe 51 is connected between the medium-frequency electric furnace 1 and the first cooling device 2. The second cooling water outlet pipe 52 is connected between the first cooling device 2 and the water tank 4. The first cooling water inlet pipe 53 is connected between the water tank 4 and the second cooling device 3. The second cooling water inlet pipe 54 is connected between the second cooling device 3 and the medium-frequency electric furnace 1. The first cooling water outlet pipe 51, the second cooling water outlet pipe 52, the first cooling water inlet pipe 53, and the second cooling water inlet pipe 54 are all fitted with multiple heat dissipation fins 55. The multiple heat dissipation fins 55 on the cooling water pipes have a large contact area with the cooling water pipes, which dissipates the heat in the cooling water and improves the cooling effect on the medium-frequency electric furnace 1.

[0025] Furthermore, the water tank 4 is filled with cooling water. Both the first cooling device 2 and the second cooling device 3 are provided with cooling water inlet and cooling water outlet. A first water pump 6 is connected between the cooling water outlet of the first cooling device 2 and one end of the second cooling water outlet pipe 52. A second water pump 7 is connected between the cooling water inlet of the second cooling device 3 and one end of the first cooling water inlet pipe 53. The first water pump 6 is used to draw cooling water from the first cooling device 2 into the water tank 4, and the second water pump 7 is used to draw cooling water from the water tank 4 to the second cooling device 3, so that the cooling water circulates in the cooling circuit.

[0026] More preferably, multiple first cooling water outlet pipes 51 and multiple second cooling water inlet pipes 54 are provided to connect to the induction coil, magnetic yoke, cables and other components of the medium frequency electric furnace 1. Each of the multiple first cooling water outlet pipes 51 is connected to the cooling water inlet of the first cooling device 2 and the multiple second cooling water inlet pipes 54 is connected to the cooling water outlet of the second cooling device 3. The inlet / outlet adapter 56 is a stainless steel pipe, including a branch pipe 561 and a manifold 562. The branch pipe 561 is connected to the multiple first cooling water outlet pipes 51 or the multiple second cooling water inlet pipes 54, and the manifold 562 is connected to the cooling water inlet of the first cooling device 2 or the cooling water outlet of the second cooling device 3.

[0027] Specifically, the first refrigerant tank 211 contains an evaporation chamber 2110, the second refrigerant tank 212 contains a condensation chamber 2120, the evaporation chamber 2110 contains gaseous refrigerant, and the condensation chamber 2120 contains liquid refrigerant; the cooling tank 213 contains a cooling chamber 2130, the cooling tank 213 has a cooling water inlet and a cooling water outlet, the cooling water inlet and cooling water outlet are located on opposite sides of the cooling tank 213 and are connected to the cooling chamber 2130; the evaporation chamber 2110 and the condensation chamber 2120 are connected by multiple refrigerant pipes 214, the condensation chamber 2120 is connected to the pressure reducer 24 through a pipe, the evaporation chamber 2110 is connected to the compressor 22 through a pipe, and the condenser 23 is connected between the compressor 22 and the pressure reducer 24 through a pipe.

[0028] Preferably, the cooling chamber 213 is equipped with multiple heat sinks 210, and multiple refrigerant pipes 214 pass through these heat sinks 210. By installing heat sinks 210 on the refrigerant pipes 214, the contact area is increased, allowing the cooling water in the cooling chamber 2130 to fully exchange heat with the refrigerant in the refrigerant pipes 214 and the heat sinks 210, thus reducing the temperature of the cooling water entering the cooling chamber 2130. The refrigerant flows from the condensing chamber 2120 along the refrigerant pipes 214 to the evaporating chamber 2110. During its flow along the refrigerant pipes 214, the refrigerant exchanges heat with the cooling water in the cooling chamber 2130, absorbing heat and evaporating. The gaseous refrigerant flows out of the evaporating chamber 2110 and flows along the pipeline into the compressor 22 for compression, then is condensed by the condenser 23, depressurized by the pressure reducer 24, and then enters the condensing chamber 2120. Preferably, the refrigerant pipes 214 and the cooling water pipes are copper pipes, and the heat sinks 210 are aluminum or copper sheets.

[0029] Furthermore, the first water pump 6, the second water pump 7, the compressor 22, the condenser 23, and the pressure reducer 24 are all electrically connected to the PLC controller so that the PLC controller can control the working status of the first water pump 6, the second water pump 7, the compressor 22, the condenser 23, and the pressure reducer 24.

[0030] Preferably, a temperature sensor 8 is provided at the outlet of the water tank 4. The temperature sensor 8 is used to detect the temperature of the cooling water flowing out of the water tank 4. The temperature sensor 8 is electrically connected to the PLC controller and transmits the detected temperature signal to the PLC controller. When the temperature sensor 8 detects that the water temperature at the outlet of the water tank 4 is higher or lower than the preset temperature value, the PLC controller controls the compressor 22, condenser 23 and pressure reducer 24 of the second cooling device 3 to run or stop, thereby saving energy.

[0031] When the first cooling device 2 and the second cooling device 3 are used to cool the cooling water, the cooling water in the cooling water pipe absorbs the heat generated by the medium-frequency electric furnace 1 and its temperature rises, turning into hot water. It flows out from the first cooling water outlet pipe 51 and then flows into the heat exchange mechanism 210 of the first cooling device 2. At the same time, the cooling water flowing out from the water tank 4 enters the heat exchange mechanism 210 of the second cooling device 3. The cooling water exchanges heat with the refrigerant in the refrigerant pipe 214 in the cooling chamber 2130, which lowers the water temperature. It then enters the cooling water pipe again to cool the medium-frequency electric furnace 1, and so on.

[0032] This invention forms a closed cooling circuit by sealing the cooling water pipes with the first cooling device 2, the second cooling device 3, and the water tank 4. This ensures that the cooling water used to cool the medium-frequency electric furnace 1 is in a closed loop during circulation, preventing leakage and evaporation, thus making full use of water resources and avoiding waste. In addition, the first cooling device 2 and the second cooling device 3 are equipped with a heat exchange mechanism 21, a compressor 22, a condenser 23, and a pressure reducer 24 connected in sequence, which allows the cooling water to circulate and absorb and release heat quickly. Furthermore, the cooling water pipes are equipped with multiple heat dissipation fins 55, which have a large contact area with the cooling water pipes, thus dissipating the heat from the cooling water and achieving a highly efficient circulating cooling effect for the medium-frequency electric furnace 1.

[0033] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0034] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A water-cooling system for a medium-frequency electric furnace, characterized in that: The system includes a medium-frequency electric furnace, a cooling device, a water tank, and cooling water pipes. The cooling device is used to cool the cooling water and includes a first cooling device and a second cooling device. The cooling water pipes are sealed to the first cooling device, the second cooling device, and the water tank to form a closed cooling circuit. The cooling water pipes are equipped with multiple heat dissipation fins. The first cooling device and the second cooling device have the same structure, both including a heat exchange mechanism, a compressor, a condenser, and a pressure reducer that are connected in sequence to form a closed circuit through pipelines. The heat exchange mechanism includes a first refrigerant tank, a second refrigerant tank, a cooling box located between the first refrigerant tank and the second refrigerant tank, and multiple refrigerant pipes that pass through the cooling box and are connected to the first refrigerant tank and the second refrigerant tank at both ends, respectively.

2. The medium-frequency electric furnace water-cooling system according to claim 1, characterized in that: The cooling water pipes include a first cooling water outlet pipe, a second cooling water outlet pipe, a first cooling water inlet pipe, and a second cooling water inlet pipe. The first cooling water outlet pipe is connected between the medium-frequency electric furnace and the first cooling device. The second cooling water outlet pipe is connected between the first cooling device and the water tank. The first cooling water inlet pipe is connected between the water tank and the second cooling device. The second cooling water inlet pipe is connected between the second cooling device and the medium-frequency electric furnace. Multiple heat dissipation fins are fitted on the first cooling water outlet pipe, the second cooling water outlet pipe, the first cooling water inlet pipe, and the second cooling water inlet pipe.

3. The medium-frequency electric furnace water-cooling system according to claim 2, characterized in that: The water tank contains cooling water. Both the first cooling device and the second cooling device are provided with cooling water inlet and cooling water outlet. A first water pump is connected between the cooling water outlet of the first cooling device and one end of the second cooling water outlet pipe. A second water pump is connected between the cooling water inlet of the second cooling device and one end of the first cooling water inlet pipe.

4. The medium-frequency electric furnace water cooling system according to claim 3, characterized in that: Multiple first cooling water outlet pipes and multiple second cooling water inlet pipes are provided. Each of the multiple first cooling water outlet pipes is connected to the cooling water inlet of the first cooling device, and each of the multiple second cooling water inlet pipes is connected to the cooling water outlet of the second cooling device. The inlet and outlet pipes are stainless steel pipes, including a branch pipe and a manifold. The branch pipe is connected to the multiple first cooling water outlet pipes or the second cooling water inlet pipes, and the manifold is connected to the cooling water inlet of the first cooling device or the cooling water outlet of the second cooling device.

5. The medium-frequency electric furnace water-cooling system according to claim 4, characterized in that: The first refrigerant tank contains an evaporation chamber, and the second refrigerant tank contains a condensation chamber. The evaporation chamber contains gaseous refrigerant, and the condensation chamber contains liquid refrigerant. The cooling tank contains a cooling chamber, and the cooling water inlet and outlet are located on opposite sides of the cooling tank and are connected to the cooling chamber. The evaporation chamber and the condensation chamber are connected by multiple refrigerant pipes. The condensation chamber is connected to the pressure reducer through a pipe, and the evaporation chamber is connected to the compressor through a pipe. The condenser is connected between the compressor and the pressure reducer through a pipe.

6. The medium-frequency electric furnace water-cooling system according to claim 5, characterized in that: The cooling box is equipped with multiple heat sinks, and multiple refrigerant pipes pass through the multiple heat sinks. The refrigerant pipes and cooling water pipes are copper pipes, and the heat sinks are aluminum or copper sheets.

7. The medium-frequency electric furnace water-cooling system according to claim 6, characterized in that: The first water pump, the second water pump, the compressor, the condenser, and the pressure reducer are all electrically connected to the PLC controller.

8. The medium-frequency electric furnace water-cooling system according to claim 7, characterized in that: A temperature sensor is installed at the outlet of the water tank. The temperature sensor is used to detect the temperature of the cooling water flowing out of the water tank and is electrically connected to the PLC controller.

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