Pre-maintenance transformer cabinet based on air duct heat dissipation structure

Abstract

The utility model relates to a pre-maintenance transformer cabinet based on an air duct heat dissipation structure, which comprises a cabinet body, a fan, an air cavity, a low-voltage control part, a main control part, a high-voltage sealing plate, a phase-shifting transformer and a pressure relief cover plate, the air cavity is fixed at the top of the cabinet body and communicated with an air inlet of the fan, the main control part is arranged on one side of the cabinet body, and the high-voltage sealing plate is arranged on the other side of the cabinet body. The high-voltage sealing plate is fixedly connected below the front part of the cabinet body and is used for sealing after first-time high-voltage wiring; an air inlet is formed in the high-pressure sealing plate; the low-voltage control part is arranged above the front part of the cabinet body; the phase-shifting transformer is fixed in the cabinet body, and the top of the cabinet body is fixedly connected with a pressure relief cover plate; and incoming and outgoing lines of the phase-shifting transformer are arranged at the bottom of the phase-shifting transformer. The transformer cabinet has the advantages of compact structure, small volume and low cost compared with a conventional transformer cabinet. The phase-shifting transformer, the control part and the heat dissipation system adopt an integrated design, separate high-voltage and low-voltage wiring, and have the characteristics of compact overall structure, small size and convenience in maintenance.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformers, and in particular relates to a front maintenance transformer cabinet based on a duct heat dissipation structure. Background Art

[0002] High-voltage frequency converters typically consist of a control cabinet, transformer cabinet, bypass cabinet, and power cabinet. Because the control cabinet controls the transformer, its cooling system, protective devices, monitoring components, and other components, it generates a large number of control and signal acquisition wiring harnesses. Using a separate control cabinet can lead to large amounts of wiring and long wiring lengths.

[0003] Transformer cabinets with integrated control are also restricted by safety performance indicators such as electrical clearance and creepage distance, resulting in larger transformer cabinets and smaller transformer capacity, which greatly reduces availability.

[0004] Air-cooled transformer cabinets often require multiple fans to dissipate heat. Many sites require enclosed, directional exhaust, necessitating the installation of air ducts. These ducts increase costs and complicate assembly and disassembly.

[0005] In the prior art, application number: 202022301252.1 discloses a transformer cabinet based on a wind tube type transformer, including an input and output line cabinet, a transformer cabinet, and a cabinet top cooling fan. A wind tube type transformer is installed in the transformer cabinet; the input and output line cabinet is installed on one side of the transformer cabinet, and the cabinet top cooling fan is installed on the top of the transformer cabinet. The input and output line cabinets are independent cabinets, which are convenient for users to connect wires. The high-voltage input part adopts a transparent and observable isolation structure and is completely isolated from the output part, and a cabinet top pressure relief cover is added to the input part to ensure electrical safety. After the wind tube type transformer, the turbulence of the air duct is reduced, the overall mass and volume of the transformer cabinet are reduced, and the power density is increased. However, the exhaust direction of this structure cannot be changed, which is not conducive to the heat dissipation of the cabinet. Summary of the Invention

[0006] The purpose of the utility model is to provide a front maintenance transformer cabinet based on a duct heat dissipation structure, which reduces the volume, has selectable air outlet directions, and improves the heat dissipation effect; the high and low voltage wiring are separated and the front wiring method is adopted, making maintenance more convenient.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A front maintenance transformer cabinet based on a duct heat dissipation structure includes a cabinet body, a fan, an air cavity, a low-voltage control part, a main control part, a high-voltage sealing plate, a phase-shifting transformer, and a pressure relief cover. The air cavity is fixed to the top of the cabinet body and is connected to the air inlet of the fan. The main control part is arranged on one side of the cabinet body. The high-voltage sealing plate is fixedly connected to the bottom of the front of the cabinet body and is used for sealing after the first high-voltage wiring. The high-voltage sealing plate is provided with an air inlet; the low-voltage control part is arranged above the front of the cabinet body; the phase-shifting transformer is fixed in the cabinet body, and the pressure relief cover plate is fixedly connected to the top of the cabinet body; the input and output lines of the phase-shifting transformer are both arranged at the bottom of the phase-shifting transformer.

[0009] The phase-shifting transformer is a wind-cylinder type phase-shifting transformer.

[0010] The fan is capable of front-to-back bidirectional exhaust.

[0011] The front side or the rear side of the fan is connected with a blocking plate.

[0012] The other side of the fan is connected with an air duct.

[0013] The air inlet is provided with a lock-free ventilation net.

[0014] The low-voltage control part is a box structure.

[0015] The phase-shifting transformer is arranged at the rear of the cabinet.

[0016] The wind cavity is connected with the main control part, the low-voltage control part and the phase-shifting transformer.

[0017] The main control part is provided with an air inlet.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The front-accessible transformer cabinet, based on a fan-cooled heat dissipation structure, is compact and small, making it less expensive than conventional transformer cabinets. The phase-shifting transformer, control unit, and heat dissipation system are integrated into a single design, with separate high and low voltage wiring. The overall structure is compact, small, and easy to maintain.

[0020] 2. The utility model adopts an integrated high-voltage input and output line installation form. The input and output lines of the phase-shifting transformer are both set at the bottom, which can compress the accessory space required for high-voltage wiring, improve space utilization, and effectively separate high and low voltage wiring. When the transformer capacity is large, a smaller cabinet volume can also be achieved.

[0021] 3. The input and output lines of the phase-shifting transformer of this utility model are all set at the bottom, and the low-voltage control part adopts a box structure and is set above the front of the cabinet, so that the high and low voltage wiring are separated. The high-voltage sealing plate is fixedly connected to the bottom of the front of the cabinet, and the main control part is also set on one side of the cabinet. Combined with the low-voltage control part, the front wiring is realized, which is convenient for the maintenance of the transformer cabinet.

[0022] 4. This utility model places the fan on the top of the cabinet and connects the air duct to the fan outlet, making the outlet direction selectable and facilitating on-site installation. The air-cooling design with air cavity allows users to easily select the outlet direction without the need for an air duct.

[0023] 5. The utility model adopts a front maintenance design and is equipped with a lock-free ventilation net. Even if the rear space of the cabinet is restricted, the air inlet filter cotton can be easily replaced by simply disassembling the lock-free ventilation net, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the main view of the present utility model.

[0025] Figure 2 It is a side view of the present utility model.

[0026] Figure 3 It is a top view of the present utility model.

[0027] In the figure: 1- fan 2- air cavity 3- low-pressure control part 4- main control part 5- high-pressure sealing plate 6- air inlet 7- phase-shifting transformer 8- pressure relief cover 9- baffle plate 10- air duct 11- high-voltage centralized wiring part. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] See Figure 1-Figure 3A front-maintained transformer cabinet based on a fan duct heat dissipation structure includes a cabinet, a fan 1, an air cavity 2, a low-voltage control unit 3, a main control unit 4, a high-voltage cover plate 5, a phase-shifting transformer 7, and a pressure relief cover plate 8. The air cavity 2 is fixed to the top of the cabinet and communicates with the air inlet of the fan 1. The main control unit 4 is located on one side of the cabinet, while other components, such as the low-voltage control unit 3 and the phase-shifting transformer 7, are located in the middle and on the other side of the cabinet. An air inlet 6 is provided in front of the main control unit 4. The high-voltage cover plate 5 is fixedly attached to the lower front of the cabinet and is used to seal the cabinet after the initial high-voltage connection. The high-voltage cover plate 5 is provided with an air inlet 6, which, together with the air inlet 6 of the main control unit 4, cooperates with the fan 1 and air cavity 2 to achieve cabinet cooling. The low-voltage control unit 3 is located at the upper front of the cabinet and is a box-shaped structure, separating it from the high-voltage section. The phase-shifting transformer 7 is fixed within the cabinet, and a pressure relief cover plate 8 is fixedly attached to the top of the cabinet to provide high-voltage protection for the phase-shifting transformer 7. The input and output lines of the phase-shifting transformer 7 are all arranged at the bottom of the phase-shifting transformer 7. The phase-shifting transformer 7 is a wind-cylinder type phase-shifting transformer 7. The wind-cylinder type phase-shifting transformer is placed at the rear side of the cabinet, and is separated from the low-voltage control part 3 at the front side. Figure 3 The red box is the high-voltage centralized wiring section 11, and the red box is the low-voltage wiring section. The air cavity 2 is connected to the interior of the cabinet, and is also connected to the main control section 4, the low-voltage control section 3, and the phase-shifting transformer 7.

[0031] Example 2

[0032] See Figure 2 Based on Example 1, fan 1 adopts a front-to-back bidirectional exhaust structure. Without a windshield, fan 1 provides bidirectional exhaust. When directional exhaust is required, fan 1 can be blocked with a blocking plate 9. Blocking plate 9 can be used to block either the front or rear side of fan 1, eliminating the need for air duct 10 and facilitating user-selected directional air outlets. Unblocked air outlets can be connected to air duct 10 for directional airflow, achieving directional air outlets.

[0033] Example 3

[0034] See Figure 1 In embodiments 1 and 2, an unlocked ventilation net is provided on the air inlet 6 on the high-pressure sealing plate 5. Even if the rear placement space of the cabinet is restricted, the air inlet filter cotton can be easily replaced by simply removing the air net, which is convenient for maintenance.

[0035] The utility model has a compact structure and small size, and is cheaper than conventional transformer cabinets. The phase-shifting transformer 7, control part, and heat dissipation system adopt an integrated design, separating high and low voltage wiring. The overall structure is compact, small in size, and easy to maintain.

[0036] 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 specific embodiments. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions. Due to space limitations and to keep the specification concise, each solution formed by these combinations is not described one by one. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A front maintenance transformer cabinet based on a duct heat dissipation structure, characterized in that: It includes a cabinet, a fan, an air cavity, a low-voltage control part, a main control part, a high-voltage sealing plate, a phase-shifting transformer, and a pressure relief cover. The air cavity is fixed on the top of the cabinet and is connected to the air inlet of the fan. The main control part is arranged on one side of the cabinet. The high-voltage sealing plate is fixedly connected to the bottom of the front of the cabinet and is used for sealing after the first high-voltage wiring. The high-voltage sealing plate is provided with an air inlet; the low-voltage control part is arranged above the front of the cabinet; the phase-shifting transformer is fixed in the cabinet, and the pressure relief cover is fixedly connected to the top of the cabinet; the input and output lines of the phase-shifting transformer are both arranged at the bottom of the phase-shifting transformer.

2. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The phase-shifting transformer is a wind-cylinder type phase-shifting transformer.

3. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The fan is capable of front-to-back bidirectional exhaust.

4. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 3 is characterized in that: The front side or the rear side of the fan is connected with a blocking plate.

5. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 4 is characterized in that: The other side of the fan is connected with an air duct.

6. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The air inlet is provided with a lock-free ventilation net.

7. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The low-voltage control part is a box structure.

8. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The phase-shifting transformer is arranged at the rear of the cabinet.

9. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The wind cavity is connected with the main control part, the low-voltage control part and the phase-shifting transformer.

10. The front maintenance transformer cabinet based on the air duct heat dissipation structure according to claim 1 is characterized in that: The main control part is provided with an air inlet.

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