Vacuum melting furnace power supply cabinet

Abstract

The invention discloses a vacuum melting furnace power supply cabinet, the interior of the cabinet body is divided into a rectification area, a filtering area, an inversion area, a high-frequency transformation area, a primary resonance area, a secondary resonance area and a cooling distribution area, the rectification area is located in the upper area of the cabinet body, and the upper areas of the inversion area and the secondary resonance area are adjacent to the rectification area; the upper area of the primary resonance area is located on one side of the inversion area and is adjacent to the upper area of the secondary resonance area, and the upper area of the cooling distribution area is located between the upper area of the secondary resonance area and the side wall of the cabinet body; the high-frequency transformation area is located in the lower area of the cabinet body below the rectification area, the lower area of the cooling distribution area is adjacent to the high-frequency transformation area, the filtering area is adjacent to the lower areas of the high-frequency transformation area and the cooling distribution area, and the lower area of the primary resonance area is located on one side of the filtering area and is adjacent to the lower area of the secondary resonance area. And the lower area of the secondary resonance area is positioned on one side of the lower area of the cooling distribution area. The invention has the advantages of partitioned design, ingenious layout, less mutual interference of devices, stable work of the power supply and high production efficiency.

Description

Technical Field

[0001] This invention relates to a power supply cabinet for a vacuum melting furnace, belonging to the technical field of power supply cabinets for melting furnaces. Background Technology

[0002] A vacuum precision casting furnace is a melting equipment used to induction heat and remelt pre-alloyed high-temperature master alloy materials in a vacuum environment, and then pour them into a mold in a vacuum environment to produce the required precision castings.

[0003] When an intermediate frequency furnace is operating, the components in the power supply cabinet generate heat, which places demands on the design of the power supply cabinet. Moreover, the requirements are even more stringent for the power supply cabinet of a vacuum melting furnace. However, existing technologies do not provide technical solutions for the design of power supply cabinets specifically for vacuum melting furnaces. Only one novel intermediate frequency power supply cabinet, such as the one disclosed in CN216491397U, exists, but its disclosed structure is clearly unsuitable for the installation and use of components in a vacuum melting furnace. Furthermore, CN209845577U discloses a water-cooled combined intermediate frequency furnace series power supply control cabinet, where the cooling device consists of an inlet pipe 9, an outlet pipe 11, an upper pipe 12, a branch pipe 13, and a lower pipe 14. This is clearly not a cooling method specifically designed for melting furnace power supplies.

[0004] The search revealed no reasonable technical solutions for the design of device assembly within the power cabinet of a vacuum melting furnace. Summary of the Invention

[0005] Based on the customer's technical requirements and considering the aforementioned problems in existing technologies, our company organized R&D personnel to tackle these challenges and ultimately developed a power supply cabinet for a vacuum melting furnace. This cabinet features a reasonable internal design, convenient installation, no interference between components, good heat dissipation, and stable power supply operation.

[0006] The purpose of this invention is to solve the aforementioned problems in the prior art and to provide a power supply cabinet for a vacuum melting furnace. The cabinet is cuboid in shape, and its interior is divided into a rectification zone, a filtering zone, an inverter zone, a high-frequency transformer zone, a primary resonant zone, a secondary resonant zone, and a cooling distribution zone. The rectification zone is located in the upper part of the cabinet, and the upper regions of the inverter zone and the secondary resonant zone are adjacent to the rectification zone. The upper region of the primary resonant zone is located on one side of the inverter zone and adjacent to the upper region of the secondary resonant zone. The upper region of the cooling distribution zone is located between the upper region of the secondary resonant zone and the side wall of the cabinet. The high-frequency transformer zone is located in the lower part of the cabinet and below the rectification zone. The lower region of the cooling distribution zone is adjacent to the high-frequency transformer zone. The filtering zone, located below the rectification zone, is adjacent to the high-frequency transformer zone, and the region below the inverter zone is adjacent to the lower region of the cooling distribution zone. The lower region of the primary resonant region is located below the inverter region and the upper region of the primary resonant region, and is situated to one side of the filter region, adjacent to the lower region of the secondary resonant region. The lower region of the secondary resonant region is situated to one side of the lower region of the cooling distribution region, and is located below the upper region of the secondary resonant region. Several main connection copper busbars and output copper busbars are installed in the cabinet between the upper and lower regions. The electrical components installed in each region are connected to the corresponding main connection copper busbars or output copper busbars via auxiliary connection copper busbars. A circuit breaker is installed on the cabinet wall on one side of the rectifier region, with its input terminal connected to the corresponding input copper busbar. The coolant connection pipe is led out from the main inlet pipe of the cooling distribution region and connected to the coolant inlet of the corresponding device to be cooled. The coolant outlet of the device to be cooled flows back to the main outlet pipe of the cooling distribution region through the coolant connection pipe, forming a coolant circulation. The partitioned arrangement of devices reduces mutual interference between devices and provides sufficient space for the installation of cooling pipes.

[0007] Furthermore, the cabinet includes a main frame and mounting brackets connected to the main frame and located in each zone. Electrical equipment in each zone is installed on the mounting brackets. Lifting rings are set on the four sides of the top of the main frame. The cabinet panels are bolted to the main frame to form a sealed cabinet.

[0008] Furthermore, a dust removal fan is installed on the outer top of the cabinet, positioned above the output copper busbar. This zoned layout of the cabinet space facilitates the external dust removal fan's removal of dust and also enhances heat dissipation.

[0009] Furthermore, two thyristor rectifier module groups are installed in the rectifier area. Two circuit breakers are installed on the cabinets on both sides of the two rectifier module groups. The input terminals of the circuit breakers are connected to input copper busbars, which extend from the top of the cabinet and connect to the incoming lines. Insulation is provided between the input copper busbars and between them and the top plate of the cabinet. The output terminals of the two circuit breakers are connected to their respective rectifier module groups via connecting copper busbars. A filter inductor I is installed on the cabinet below rectifier module group I, and a high-frequency transformer is installed on the cabinet below rectifier module group II. Filter inductor II, filter capacitor I, and filter capacitor II are sequentially installed from one side of filter inductor I to the lower part of the primary resonant region. Three primary resonant capacitors are sequentially installed in the lower part of the primary resonant region. Two commutator capacitors are installed in the inverter area. The inverter module is mounted on two commutation inductors, above filter inductor II, filter capacitors I and II, and two primary resonant capacitors. One primary resonant capacitor is placed in the upper region of the primary resonant region, six secondary resonant capacitors are installed sequentially in the upper region of the secondary resonant region, and three secondary resonant capacitors are installed sequentially in the lower region of the secondary resonant region. Every three secondary resonant capacitors form a group, and six output copper busbars are arranged in parallel. Each group of secondary resonant capacitors is connected to one output copper busbar through an auxiliary connecting copper busbar. The secondary coil of the high-frequency transformer is connected to three groups of secondary resonant capacitors and the remaining three output copper busbars. One end of the six output copper busbars passes through the secondary resonant region and extends out of the side wall of the cabinet. Insulation is provided between the output copper busbars and between them and the side plate of the cabinet.

[0010] Furthermore, the two terminals of the primary coil of the high-frequency transformer extend auxiliary connecting copper busbars into the space above them, which are respectively connected to the main connecting copper busbar I connected to the primary resonant capacitor and the main connecting copper busbar II connected to the commutation inductor. The main connecting copper busbar I and the main connecting copper busbar II are arranged in parallel, and the copper busbars are bent when they extend from the upper part of the filter area to the upper part of the high-frequency transformer area.

[0011] Furthermore, both the inlet and outlet main pipes extend from the cooling distribution area to the top of the housing, with connecting flanges at their ends for connecting to the circulating cooling system.

[0012] The advantages of this invention over the prior art are as follows: 1. The zoned design allows for higher power output of electrical components, reduces interference between components, and ensures stable power supply operation; 2. The capacity of individual components increases, the number of components used decreases, and the overall space occupied decreases; 3. The spatial layout provides ample installation space for the heat dissipation pipes, making installation and maintenance easier; 4. It adopts a regional structure design with a clever layout, fast connection of internal components, and high production efficiency. Attached Figure Description

[0013] Figure 1 This is the circuit schematic diagram of the present invention; Figure 2 This is a top view of Embodiment 1 of the present invention; Figure 3 This is a perspective view of Embodiment 1 of the present invention; Figure 4 This is a front view of Embodiment 2 of the present invention; In the diagram: 1. Input copper busbar, 2. Rectifier module group, 3. Circuit breaker, 4. Commutator inductor, 5. Inverter module, 6. Secondary resonant capacitor, 7. Primary resonant capacitor, 8. High-frequency transformer, 9. Filter inductor I, 10. Filter inductor II, 11. Filter capacitor, 12. Output copper busbar, 13. Main connection copper busbar, 14. Liquid inlet main pipe, 15. Liquid outlet main pipe, 16. Dust removal fan. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Example

[0015] like Figure 2 , 3 The vacuum melting furnace power supply cabinet shown includes a cuboid cabinet. The cabinet's internal areas are divided into a rectification area, a filtering area, an inverter area, a high-frequency transformer area, a primary resonant area, a secondary resonant area, and a cooling distribution area. The electrical connection schematic is shown below. Figure 1 As shown.

[0016] The rectifier section is located in the upper part of the cabinet. Two thyristor rectifier module groups 2 are installed within this section, with an installation gap between them, and are symmetrically arranged back-to-back. Two circuit breakers 3 are installed on both sides of the cabinet on either side of the two rectifier module groups 2. The input terminals of the circuit breakers 3 are connected to input copper busbars 1, which extend from the top of the cabinet and connect to the incoming lines. Insulating posts are installed between the input copper busbars 1 and between them and the top plate of the cabinet. The output terminals of the two circuit breakers 3 are connected to their respective rectifier module groups 2 via connecting copper busbars. The two 380V power supplies can better eliminate grid harmonics.

[0017] Adjacent to the rectifier area are the inverter area and the upper area of ​​the secondary resonant area. In the inverter area, two commutator inductors 4 are installed by mounting brackets, and inverter modules 5 are installed on the two commutator inductors 4 respectively. In the upper area of ​​the secondary resonant area, six secondary resonant capacitors 6 are installed in sequence. The upper area of ​​the primary resonant area is located on one side of the inverter area and adjacent to the upper area of ​​the secondary resonant area. A primary resonant capacitor 7 is set in the upper area of ​​the primary resonant area. The upper area of ​​the cooling distribution area is located between the upper area of ​​the secondary resonant area and the side wall of the cabinet.

[0018] The high-frequency transformer area is located in the lower part of the cabinet and below the rectifier area. The high-frequency transformer 8 is mounted on a bracket within the high-frequency transformer area. The high-frequency transformer 8 is located on the cabinet below the rectifier module group II. The main connecting copper busbar 13 and the output copper busbar 12 are installed in the cabinet between the upper and lower areas. The electrical connections of each area are made to the corresponding main connecting copper busbar 13 or output copper busbar 12 via auxiliary connecting copper busbars. Auxiliary connecting copper busbars are led out from the two terminals of the primary coil of the high-frequency transformer 8 to the space above it, respectively connecting to the main connecting copper busbar I connected to the primary resonant capacitor and the main connecting copper busbar II connected to the commutator inductor. The main connecting copper busbar I and the main connecting copper busbar II are arranged parallel to each other, and the main connecting copper busbars have bends as they extend upwards from the filter area towards the high-frequency transformer area.

[0019] The filtering region, located below the rectifier region, is adjacent to the high-frequency transformer region. A filter inductor I9 is ​​installed on the cabinet below rectifier module group I. Filter inductors II are sequentially installed from one side of filter inductor I9 to the lower part of the primary resonant region. 10 and two filter capacitors 11, the lower region of the primary resonant region is located below the inverter region and the upper region of the primary resonant region, three primary resonant capacitors 7 are arranged in sequence in the lower region of the primary resonant region, the lower region of the cooling distribution region is adjacent to the high frequency transformer region, the region located below the inverter region is adjacent to the lower region of the cooling distribution region, the lower region of the secondary resonant region is located on one side of the lower region of the cooling distribution region and below the upper region of the secondary resonant region, three secondary resonant capacitors 6 are installed in sequence in the lower region of the secondary resonant region, three groups of three secondary resonant capacitors are formed, a total of three groups, six output copper busbars 12 are arranged in parallel, the three groups of secondary resonant capacitors are connected to the three output copper busbars 12 through auxiliary connecting copper busbars, the secondary coil of the high frequency transformer 8 is connected to the three groups of secondary resonant capacitors and the remaining three output copper busbars respectively, one end of the six output copper busbars 12 passes through the secondary resonant region and extends out of the side wall of the cabinet, insulation is provided between the output copper busbars 12 and between them and the side plate of the cabinet.

[0020] The coolant connection pipe extends from the inlet main pipe 14 in the lower part of the cooling distribution area and connects to the coolant inlet of the corresponding device to be cooled. The coolant outlet of the device to be cooled flows back to the outlet main pipe in the lower part of the cooling distribution area through the coolant connection pipe, forming a coolant circulation. Both the inlet main pipe 14 and the outlet main pipe 15 extend from the cooling distribution area to the top of the housing, and are equipped with connecting flanges at the ends for connecting to the circulating cooling system.

[0021] The main frame and the mounting brackets extending into each area form the cabinet installation space. Lifting rings are set on the four sides of the top of the main frame, and the cabinet panels are bolted to the main frame to form the cabinet. Example

[0022] like Figure 4The vacuum melting furnace power cabinet shown has a dust removal fan 16 installed on the outer top of the cabinet, located above the output copper busbars. The dust removal fan generates positive pressure inside the cabinet. Due to the zoned distribution of space within the cabinet, the external dust removal fan can easily blow dust out from the gap between the input and output copper busbars, further facilitating heat dissipation.

[0023] The above embodiments are merely explanations and illustrations of the technical solutions of the present invention and should not be used to limit the scope of protection of the technical solutions of the present invention. All simple modifications based on this solution are within the scope of protection of the present invention.

Claims

1. A power supply cabinet for a vacuum melting furnace, the cabinet body being a cuboid, characterized in that: The cabinet is divided into four areas: a rectification area, a filtering area, an inverter area, a high-frequency transformer area, a primary resonant area, a secondary resonant area, and a cooling distribution area. The rectification area is located in the upper part of the cabinet. The upper areas of the inverter area and the secondary resonant area are adjacent to the rectification area. The upper area of ​​the primary resonant area is located on one side of the inverter area and adjacent to the upper area of ​​the secondary resonant area. The upper area of ​​the cooling distribution area is located between the upper area of ​​the secondary resonant area and the side wall of the cabinet. The high-frequency transformer area is located in the lower part of the cabinet and below the rectification area. The lower area of ​​the cooling distribution area is adjacent to the high-frequency transformer area. The filtering area below the rectification area is adjacent to the high-frequency transformer area. The area below the inverter area is adjacent to the lower area of ​​the cooling distribution area. The lower area of ​​the primary resonant area is located between the inverter area and the primary resonant area. Below the upper region of the resonant zone and on one side of the filter zone, adjacent to the lower region of the secondary resonant zone, the lower region of the secondary resonant zone is located on one side of the lower region of the cooling distribution zone and below the upper region of the secondary resonant zone; several main connection copper busbars and output copper busbars are installed in the cabinet between the upper and lower regions, and the electrical components installed in each zone are connected to the corresponding main connection copper busbars or output copper busbars through auxiliary connection copper busbars; a circuit breaker is installed on the cabinet wall on one side of the rectifier zone, and the input terminal of the circuit breaker is connected to the corresponding input copper busbar; the coolant connection pipe is led out from the main inlet pipe of the cooling distribution zone and connected to the coolant inlet of the corresponding device to be cooled, and the coolant outlet of the device to be cooled flows back to the main outlet pipe of the cooling distribution zone through the coolant connection pipe, forming a coolant circulation.

2. The power supply cabinet for the vacuum melting furnace according to claim 1, characterized in that: The cabinet includes a main frame and mounting brackets that connect to the main frame and are located in each zone. Electrical equipment in each zone is installed on the mounting brackets. Lifting rings are set on the four sides of the top of the main frame. The cabinet panels are bolted to the main frame to form a sealed cabinet.

3. The power supply cabinet for the vacuum melting furnace according to claim 2, characterized in that: A dust removal fan is installed on the outer top of the cabinet, and the dust removal fan is located above the output copper busbar.

4. The power supply cabinet for the vacuum melting furnace according to claim 1, characterized in that: Two thyristor rectifier module groups are installed in the rectifier area. Two circuit breakers are installed on the cabinets on both sides of the two rectifier module groups. The input terminals of the circuit breakers are connected to input copper busbars, which extend from the top of the cabinet and connect to the incoming lines. Insulation is provided between the input copper busbars and between them and the top plate of the cabinet. The output terminals of the two circuit breakers are connected to their respective rectifier module groups via connecting copper busbars. Filter inductor I is installed on the cabinet below rectifier module group I, and a high-frequency transformer is installed on the cabinet below rectifier module group II. Filter inductor II, filter capacitor I, and filter capacitor II are sequentially installed from one side of filter inductor I to the lower part of the primary resonant region. Three primary resonant capacitors are sequentially installed in the lower part of the primary resonant region. Two commutator inductors are installed in the inverter area. The transformer module is installed on two commutator inductors, above filter inductor II, filter capacitors I and II, and two primary resonant capacitors. One primary resonant capacitor is installed in the upper region of the primary resonant region, six secondary resonant capacitors are installed in the upper region of the secondary resonant region, and three secondary resonant capacitors are installed in the lower region of the secondary resonant region. Every three secondary resonant capacitors form a group. Six output copper busbars are arranged in parallel. Each group of secondary resonant capacitors is connected to one output copper busbar through an auxiliary connecting copper busbar. The secondary coil of the high-frequency transformer is connected to three groups of secondary resonant capacitors and the remaining three output copper busbars. One end of the six output copper busbars passes through the secondary resonant region and extends out of the side wall of the cabinet. Insulation is provided between the output copper busbars and between them and the side plate of the cabinet.

5. The power supply cabinet for the vacuum melting furnace according to claim 4, characterized in that: The two terminals of the primary coil of the high-frequency transformer lead out auxiliary connecting copper busbars to the space above them, which are respectively connected to the main connecting copper busbar I connected to the primary resonant capacitor and the main connecting copper busbar II connected to the commutator inductor. The main connecting copper busbar I and the main connecting copper busbar II are arranged in parallel, and have a bent copper busbar when extending from the upper part of the filter area to the upper part of the high-frequency transformer area.

6. The power supply cabinet for the vacuum melting furnace according to claim 1, characterized in that: Both the inlet and outlet main pipes extend from the cooling distribution area to the top of the housing, with connecting flanges at the ends for connecting to the circulating cooling system.

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