High-power high-voltage water-cooling frequency converter structure

Abstract

The utility model relates to a high-power high-voltage water-cooling frequency converter structure, which comprises a cabinet body, a shell frame and a power unit module, the shell frame is fixed at the front part of the cabinet body, the shell frame is of a multilayer structure, the shell frame is composed of a transverse beam, a vertical beam and a longitudinal beam which are connected in an inserting manner, the transverse beam and the longitudinal beam enclose an interlayer support frame, and the power unit module is arranged on the interlayer support frame. The interlayer support frame is fixedly connected with the vertical beam, the interlayer support frame is used for placing a power unit module, and the power unit module comprises a rectifier module, an inverter module and a direct current capacitor module. The utility model has the advantages that the power unit modules are integrally mounted in the cabinet body by adopting the shell frame structure, so that the single cabinet body can be assembled and modularized according to requirements, the expansibility is stronger, the production cycle is greatly shortened, the integral transportation can be realized, the production cycle of equipment is shortened, and the site construction cost is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage frequency conversion cabinets, and in particular relates to a high-power high-pressure water-cooled frequency converter structure. Background Art

[0002] As the capacity of high-pressure water-cooled inverters continues to increase (8 to 60 MVA), the size and weight of the equipment are also increasing, causing significant inconvenience in transportation, maintenance, and installation. Currently, domestic inverter manufacturers package the power unit modules of large-capacity water-cooled inverters as a single module. After production, the modules are packaged and shipped individually, and the entire unit is assembled on-site. A disadvantage is that if a device malfunctions, disassembly and replacement of the power module is difficult, increasing maintenance time. Furthermore, on-site assembly of the power unit module increases the probability of failure.

[0003] The power unit module input end of a high-power, high-pressure, water-cooled inverter usually inserts the cable directly into the cabinet from the top or bottom of the cabinet for wiring. When there are a large number of cables, wiring is more difficult, which increases on-site construction time and costs.

[0004] The overall layout of existing high-power, high-voltage water-cooled inverters typically places the water-cooling piping and high-voltage circuitry on one side. Leaks in the water-cooling piping can cause serious problems such as a high-voltage short circuit and machine failure. Summary of the Invention

[0005] The purpose of the utility model is to provide a high-power high-pressure water-cooled inverter structure, which combines the cabinet frame and the power module into an integral module, facilitates overall transportation, and reduces the failure rate caused by on-site assembly.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A high-power, high-pressure, water-cooled inverter structure includes a cabinet, a shell frame, and a power unit module. The shell frame is fixed to the front of the cabinet. The shell frame is a multi-layer structure. The shell frame is composed of transverse beams, vertical beams, and longitudinal beams connected by plug-in. The transverse beams and longitudinal beams form an interlayer support frame, which is fixedly connected to the vertical beams. The interlayer support frame is used to place the power unit module. The power unit module includes a rectifier module, an inverter module, and a DC capacitor module.

[0008] It also includes a wiring cavity and an insulating sleeve. The wiring cavity is provided on the top of the cabinet, and the insulating sleeve is arranged in the wiring cavity. The input end of the power unit module is introduced into the wiring cavity through the copper busbar through the insulating sleeve.

[0009] The front part of the cabinet is provided with a heat dissipation water pipe, which is connected to the power unit module; the rear part of the cabinet is the electrical wiring part.

[0010] A groove one is provided on the vertical beam, and the transverse beam is plugged into the groove one and fixedly connected to the vertical beam by screws.

[0011] The depth of the groove 1 is the same as the thickness of the transverse beam.

[0012] The transverse beam is provided with a second groove, the longitudinal beam is plugged into the second groove, and is fixedly connected to the transverse beam by screws.

[0013] The depth of the second groove is the same as the thickness of the longitudinal beam.

[0014] The shell frame is made of insulating board.

[0015] The inverter structure is a power cabinet unit cabinet module, and multiple power cabinet unit cabinet modules are expanded to form inverters of different voltage levels.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The high-power, high-pressure water-cooled inverter structure adopts a shell frame structure to install the power unit module as a whole in the cabinet, so that a single cabinet can form a modular design that can be assembled according to demand, which has stronger scalability and greatly shortens the production cycle. At the same time, it can also be transported as a whole, shortening the equipment's production cycle and reducing on-site construction costs.

[0018] 2. The shell frame of the utility model adopts an insulating plate and a plug-in fixing form, which is convenient for assembly and positioning. It can also be assembled according to the size requirements of the power unit module, which facilitates the overall transportation of the power unit module and does not require on-site assembly.

[0019] 3. The utility model provides a wiring cavity on the top of the cabinet, which increases the overall protection level of the equipment while shortening the installation period and reducing the installation cost.

[0020] 4. The inverter of the present invention is provided with a heat dissipation water pipe at the front end to supply heat to the power unit module, and the high-voltage power input and output copper bars of the power module are provided at the rear end to achieve "water-electricity separation" and avoid serious problems such as high-voltage short circuit and machine explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the shell frame.

[0022] Figure 2 yes Figure 1 Magnified view of part A.

[0023] Figure 3 yes Figure 1 Enlarged view of part B.

[0024] Figure 4 It is a structural diagram of the cabinet.

[0025] Figure 5 yes Figure 4 Enlarged view of part C.

[0026] Figure 6 This is a schematic diagram of the power unit cabinet module expansion.

[0027] Figure 7 It is a schematic diagram of the cabinet side structure.

[0028] In the figure: 1-longitudinal beam 2-transverse beam 3-vertical beam 4-inverter module 5-DC capacitor module 6-rectifier module 7-power unit cabinet module 8-expansion module 9-connection cavity 10-insulating sleeve 11-copper busbar 12-heat dissipation water pipe. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0030] Example 1

[0031] See Figure 1-Figure 5 A high-power, high-pressure, water-cooled inverter structure includes a cabinet, a housing frame, and a power unit module. The housing frame is fixed to the front of the cabinet and has a multi-layer structure. The housing frame is composed of a transverse beam 2, a vertical beam 3, and a longitudinal beam 1 connected by plug-in. The transverse beams 2 and longitudinal beams 1 form an interlayer support frame, which is fixedly connected to the vertical beam 3 and is used to place the power unit module. The inverter power module is divided into three parts: a rectifier module 6, an inverter module 4, and a DC capacitor module 5. The housing frame has a three-layer structure, and each layer of the housing frame houses a set of inverter power modules. The inverter power module and the housing frame can be fixedly connected by bolts.

[0032] See Figure 6 The cabinet body, housing frame, and power unit modules form a standard power cabinet module 7. Multiple expansion modules 8 can be combined to create a frequency converter with the required voltage level, depending on the voltage level. The expansion modules 8 can have the same structure as the power cabinet module 7, and are electrically connected via copper busbars.

[0033] See Figure 1-Figure 3The shell frame is made of insulating board, such as epoxy resin glass cloth board. The two ends of the longitudinal beam 1 are connected to the transverse beam 2 to form a rectangular interlayer support frame; the transverse beam 2 is connected to the vertical beam 3 to form a multi-layer structure. A groove 1 is opened on the vertical beam 3, and the transverse beam 2 is inserted into the groove 1 and fixedly connected to the vertical beam 3 by screws. The depth of groove 1 is the same as the thickness of the transverse beam 2, and the surface is flat after assembly. The upper and lower ends of the vertical beam 3 are fixedly connected to the cabinet body. A groove 2 is opened on the transverse beam 2, and the longitudinal beam 1 is inserted into the groove 2 and fixedly connected to the transverse beam 2 by screws. The depth of groove 2 is the same as the thickness of the longitudinal beam 1.

[0034] Example 2

[0035] See Figure 1-Figure 5 Based on Example 1, the high-power, high-voltage, water-cooled inverter structure further includes a wiring cavity 9 and an insulating bushing 10. The wiring cavity 9 is provided at the top of the cabinet, and the insulating bushing 10 is disposed within the wiring cavity 9. The input end of the power unit module is introduced into the wiring cavity 9 through a copper busbar 11 passing through the insulating bushing 10. The wiring cavity 9 can be a steel structure, with an insulating plate fixed inside near the high-voltage contact portion.

[0036] Example 3

[0037] See Figure 1-Figure 7 In addition to Example 1 or Example 2, a heat dissipation water pipe 12 is installed at the front of the cabinet and connected to the power unit module. This pipe 12 directs cooling water to the inverter module 4 and rectifier module 6 via two parallel hoses, dissipating heat. The rear of the cabinet houses the electrical wiring. The high-voltage input and output copper busbars for the inverter power module are located at the rear of the cabinet, separate from the rectifier module 6, inverter module 4, DC capacitor module 5, and heat dissipation pipe 12, achieving "water-electricity separation."

[0038] The present invention adopts a shell frame structure to install the power unit module as a whole in the cabinet, so that a single cabinet can be assembled as needed to form a modular design, which is more expandable and greatly shortens the production cycle. At the same time, it can also be transported as a whole, shortening the equipment's production cycle and reducing on-site construction costs. The aesthetics of the overall equipment is guaranteed. Among them, the shell frame adopts epoxy resin glass fiber cloth board and adopts a plug-in fixed form, which is convenient for assembly and positioning. At the same time, it can also be assembled according to the size requirements of the power unit module, which is convenient for the overall transportation of the power unit module without on-site assembly. The wiring cavity 9 is fixed on the top of the cabinet, which increases the overall protection level of the equipment while shortening the installation cycle and reducing the installation cost. A heat dissipation water pipe 12 is set at the front end of the inverter to supply heat to the power unit module, and a high-voltage power input and output copper busbar of the power module is set at the rear end to achieve "water-electricity separation" to avoid serious problems such as high-voltage short circuit explosion.

[0039] Through the above specific embodiments, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above embodiments. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to implement different technical solutions.

Claims

1. A high-power, high-pressure water-cooled inverter structure, characterized in that: It includes a cabinet body, a shell frame, and a power unit module. The shell frame is fixed at the front of the cabinet body. The shell frame is a multi-layer structure. The shell frame is composed of horizontal beams, vertical beams, and longitudinal beams connected by plug-in. The horizontal beams and longitudinal beams form an interlayer support frame, which is fixedly connected to the vertical beams. The interlayer support frame is used to place the power unit module. The power unit module includes a rectifier module, an inverter module, and a DC capacitor module.

2. A high-power, high-pressure water-cooled inverter structure according to claim 1, characterized in that: It also includes a wiring cavity and an insulating sleeve. The wiring cavity is provided on the top of the cabinet, and the insulating sleeve is arranged in the wiring cavity. The input end of the power unit module is introduced into the wiring cavity through the copper busbar through the insulating sleeve.

3. A high-power, high-pressure water-cooled inverter structure according to claim 1, characterized in that: The front part of the cabinet is provided with a heat dissipation water pipe, which is connected to the power unit module; the rear part of the cabinet is the electrical wiring part.

4. A high-power, high-pressure water-cooled inverter structure according to claim 1, characterized in that: A groove one is provided on the vertical beam, and the transverse beam is plugged into the groove one and fixedly connected to the vertical beam by screws.

5. A high-power, high-pressure water-cooled inverter structure according to claim 4, characterized in that: The depth of the groove 1 is the same as the thickness of the transverse beam.

6. A high-power, high-pressure water-cooled inverter structure according to claim 1, characterized in that: The transverse beam is provided with a second groove, the longitudinal beam is plugged into the second groove, and is fixedly connected to the transverse beam by screws.

7. A high-power, high-pressure water-cooled inverter structure according to claim 6, characterized in that: The depth of the second groove is the same as the thickness of the longitudinal beam.

8. The high-power, high-pressure water-cooled inverter structure according to claim 1, characterized in that: The shell frame is made of insulating board.

9. The high-power, high-pressure water-cooled inverter structure according to claim 1, characterized in that: The inverter structure is a power cabinet unit cabinet module, and multiple power cabinet unit cabinet modules are expanded to form inverters of different voltage levels.

Images