Ring main unit gas tank convenient for heat dissipation

Abstract

The utility model discloses a ring main unit gas tank convenient for heat dissipation, which comprises a gas tank body, a heat exchange assembly is arranged at the top of the gas tank body, the heat exchange assembly comprises a plate-fin heat exchanger, a ventilation assembly, a gas inlet pipeline and a gas outlet pipeline, the ventilation assembly is positioned between the plate-fin heat exchanger and the gas tank body, the plate-fin heat exchanger leans against the ventilation assembly, and the gas inlet pipeline is communicated with the gas outlet pipeline. A plate-fin heat exchanger is arranged in the gas tank body, a gas inlet of the plate-fin heat exchanger is communicated with the interior of the gas tank body through a gas inlet pipeline, and a gas outlet of the plate-fin heat exchanger is communicated with the interior of the gas tank body through a gas outlet pipeline. The ventilation assembly enables fresh air to quickly pass through the plate-fin heat exchanger to exchange heat with the insulating gas, and the insulating gas only circularly flows between the ring main unit gas tank and the heat exchange assembly, so that the heat dissipation capability of the ring main unit gas tank is improved on the premise that the air tightness of the ring main unit gas tank is not damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of ring network cabinets, in particular to a ring network cabinet air box which is convenient for heat dissipation. Background Art

[0002] As an important component of the power system, the ring main unit is mainly used to realize the intelligent management of power distribution and transmission. It is usually composed of multiple components such as high-voltage switchgear, mutual inductors, lightning arresters, busbars, instruments, secondary protection systems, etc. These components are integrated in a metal-enclosed casing to realize centralized management and protection of electrical equipment.

[0003] As an important component of the ring main unit, the performance of the ring main unit gas box directly affects the safe operation of the entire ring main unit. The insulation of electrical equipment is achieved by filling the gas box with specific insulating gas. Due to the particularity of gas insulation, the ring main unit gas box has strict requirements on air tightness. Once the gas box leaks, it will not only lead to a decrease in insulation performance, but may also cause safety accidents.

[0004] However, in actual operation, the ring main unit gas box faces the problem of heating. Since the operation of the electrical equipment inside the gas box will generate a certain amount of heat, if the heat dissipation is poor, the temperature inside the gas box will rise, which will affect the normal operation of the electrical equipment. The existing technology usually uses natural convection to solve the problem of gas box heating. Although the airtightness of the air box is ensured, the heat dissipation effect is not good. Other heat dissipation solutions increase the heat dissipation efficiency by adding heat dissipation holes or installing ventilation fans, but these measures often destroy the airtightness of the air box, resulting in a decrease in insulation performance. Summary of the invention

[0005] The utility model aims to provide a ring main unit gas box which is convenient for heat dissipation in view of the problems existing in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A ring main unit air box that is easy to dissipate heat, includes an air box cabinet body, a heat exchange component is provided on the top of the air box cabinet body, the heat exchange component includes a plate-fin heat exchanger, a ventilation component, an air inlet pipeline and an air outlet pipeline, the ventilation component is located between the plate-fin heat exchanger and the air box cabinet body, and the plate-fin heat exchanger leans against the ventilation component, the air inlet of the plate-fin heat exchanger is connected to the interior of the air box cabinet body through the air inlet pipeline, and the air outlet of the plate-fin heat exchanger is connected to the interior of the air box cabinet body through the air outlet pipeline.

[0008] The utility model adds a heat exchange component to the ring main unit air box. The insulating gas in the ring main unit air box is sent into the plate-fin heat exchanger. The ventilation component allows fresh air to quickly pass through the plate-fin heat exchanger to exchange heat with the insulating gas. At the same time, the insulating gas circulates only between the ring main unit air box and the heat exchange component, thereby improving the heat dissipation capacity of the ring main unit air box without destroying the air tightness of the ring main unit air box.

[0009] Preferably, the ventilation assembly includes a cross flow fan, a support inclined plate and a support connecting plate, the support inclined plates are respectively provided on both sides of the cross flow fan, the ends of the support inclined plates are connected to each other through the support connecting plates, the plate-fin heat exchanger is arranged on the support inclined plates, and the air outlet of the cross flow fan faces the plate-fin heat exchanger.

[0010] Preferably, the ventilation assembly also includes an air inlet box, the air outlet of the air inlet box is opened on the supporting connecting plate, the air inlet of the air inlet box faces the side where the back plate of the air box cabinet is located, and a partition is also provided between the supporting inclined plates, and the partition is located between the air inlet box and the air outlet of the cross flow fan.

[0011] The partition, the support inclined plate and the air inlet box together form an air inlet cavity, which is convenient for the cross flow fan to inhale fresh air. The partition, the support inclined plate and the support connecting plate together form an air outlet cavity, which is convenient for the cross flow fan to blow fresh air to the plate-fin heat exchanger. The air inlet cavity and the air outlet cavity are separated from each other to avoid air being trapped in the ventilation component.

[0012] Preferably, the gas box cabinet comprises a top plate, a back plate and a bottom plate, the top plate, the back plate and the bottom plate are connected by reinforcing ribs, the reinforcing ribs are located inside the gas box cabinet, and the reinforcing ribs are made of channel steel.

[0013] The top plate is supported by the reinforcing ribs to ensure the structural strength of the gas box cabinet, reduce the number of welding points on the surface of the gas box cabinet, and reduce the risk of leakage of the gas box cabinet.

[0014] Preferably, the air inlet pipeline includes an air pump and an air inlet pipe, the air inlet of the air pump is opened on the top plate, and the air outlet of the air pump is connected to the air inlet of the plate-fin heat exchanger through the air inlet pipe.

[0015] Preferably, the air outlet pipeline includes a hose and a through hole, the through hole is opened on the top plate, a sealing ring is provided at the through hole, the air inlet of the hose is connected to the air outlet of the plate-fin heat exchanger, the air outlet of the hose passes through the through hole and extends to the lower half of the air box cabinet, and the hose is arranged along the reinforcing ribs.

[0016] In the sealed gas box cabinet, due to the effect of natural convection, the high-temperature insulating gas will rise to a high place, while the low-temperature insulating gas will sink to a low place. Therefore, the air inlet pipeline takes in air from a high place of the gas box cabinet to directly capture high-temperature nitrogen, and the air outlet pipeline exhausts air from a low place of the gas box cabinet so that the insulating gas after heat dissipation can return to the bottom of the gas box cabinet, which helps to form an effective insulating gas circulation and improve heat dissipation efficiency.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model adds a heat exchange component to the ring main unit air box. The insulating gas in the ring main unit air box is sent into the plate-fin heat exchanger. The ventilation component allows fresh air to quickly pass through the plate-fin heat exchanger to exchange heat with the insulating gas. At the same time, the insulating gas circulates only between the ring main unit air box and the heat exchange component, thereby improving the heat dissipation capacity of the ring main unit air box without destroying the air tightness of the ring main unit air box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 2 It is a partial cross-sectional view of the gas box cabinet in the embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the ventilation assembly after being disassembled in the embodiment of the utility model;

[0022] In the figure: 1. air box cabinet; 101. back plate; 102. reinforcing ribs; 103. control unit; 2. plate-fin heat exchanger; 3. cross-flow fan; 4. supporting inclined plate; 5. supporting connecting plate; 6. air inlet box; 601. partition; 7. air pump; 8. hose. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figures 1 to 3 As shown, the specific scheme of the embodiment is as follows: a ring main unit gas box that is easy to dissipate heat, including an air box cabinet body 1, the air box cabinet body 1 includes a top plate, a back plate 101 and a bottom plate, the top plate, the back plate 101 and the bottom plate are connected by reinforcing ribs 102, the reinforcing ribs 102 are located inside the air box cabinet body 1, and the reinforcing ribs 102 are made of channel steel.

[0026] According to the requirements of the ring main unit, one or more control units 103 are provided in the gas box cabinet 1. Each control unit 103 usually includes a load switch + fuse combination electrical unit. The operating mechanism of the load switch and the fuse is arranged on the front panel of the gas box cabinet 1. When the gas box cabinet 1 is installed on the ring main unit, there is no obstruction behind the back panel 101 of the gas box cabinet 1.

[0027] A heat exchange assembly is provided on the top plate, which includes a plate-fin heat exchanger 2, a ventilation assembly, an air inlet pipeline and an air outlet pipeline. The ventilation assembly includes a cross-flow fan 3, a supporting inclined plate 4, a supporting connecting plate 5 and an air inlet box 6. The air inlet pipeline includes an air pump 7 and an air inlet pipe, and the air outlet pipeline includes a hose 8 and a through hole.

[0028] The cross flow fan 3, the supporting inclined plate 4, the air inlet box 6, the air pump 7 and the through hole are all arranged on the top plate, and the supporting inclined plates 4 are respectively provided on both sides of the cross flow fan 3. The plate-fin heat exchanger 2 leans obliquely on the supporting inclined plates 4, and the air outlet of the cross flow fan 3 faces the plate-fin heat exchanger 2 to increase the ventilation area of ​​the plate-fin heat exchanger 2.

[0029] The ends of the supporting inclined plates 4 are connected to each other through the supporting connecting plates 5. The air outlet of the air inlet box 6 is opened on the supporting connecting plates 5. The air inlet of the air inlet box 6 faces the side where the back plate 101 is located. A filter is provided at the air inlet of the air inlet box 6. A partition 601 is also provided between the supporting inclined plates 4. The partition 601 is located between the air inlet box 6 and the air outlet of the cross flow fan 3.

[0030] The partition 601, the supporting inclined plate 4 and the air inlet box 6 together form an air inlet cavity, which is convenient for the cross flow fan 3 to inhale fresh air. The partition 601, the supporting inclined plate 4 and the supporting connecting plate 5 together form an air outlet cavity, which is convenient for the cross flow fan 3 to blow fresh air to the plate-fin heat exchanger 2. The air inlet cavity and the air outlet cavity are separated from each other to avoid air being trapped in the ventilation component.

[0031] The air inlet of the air pump 7 is opened on the top plate, and the air outlet of the air pump 7 is connected with the air inlet of the plate-fin heat exchanger 2 through the air inlet pipe. A through hole is opened on the top plate, and a sealing ring is provided at the through hole. The air inlet of the hose 8 is connected with the air outlet of the plate-fin heat exchanger 2, and the air outlet of the hose 8 passes through the through hole and extends to the lower half of the air box cabinet 1, and the hose 8 is arranged along the reinforcing rib 102. In order to prevent the hose 8 from contacting the electrical components in the air box cabinet 1, the hose 8 is buried in the channel steel, and the channel steel has a plurality of air holes near the air outlet of the hose 8 to facilitate gas circulation.

[0032] The plate-fin heat exchanger 2 forms heat exchange channels through the space between the double-sided extrusion molding of the plate and the fin. These channels allow two gases of different temperatures to flow through separately, thereby exchanging heat. The presence of the fins greatly increases the heat exchange area, allowing heat to be transferred from one gas to another more effectively.

[0033] During the heat exchange process, the insulating gas and the air blown out by the cross-flow fan 3 enter different channels of the heat exchanger respectively. The high-temperature insulating gas transfers heat to the metal wall in contact with it through the fins, and then the heat is transferred to the air channel through the metal wall. The air absorbs the heat when flowing through the fins, thereby increasing the temperature. During this process, the insulating gas does not contact the air, thereby avoiding leakage of the insulating gas.

[0034] The working principle of this embodiment is as follows: the control unit 103 in the ring main unit gas box generates heat, which will heat the insulating gas. In the sealed gas box cabinet 1, due to the effect of natural convection, the high-temperature insulating gas will rise to a high place and be sent to the plate-fin heat exchanger 2 by the air pump 7 for heat exchange. After cooling, it will return to the lower part of the gas box cabinet 1 through the air outlet pipeline, forming an effective insulating gas circulation.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ring main unit gas box for heat dissipation, comprising a gas box cabinet, characterized in that: A heat exchange assembly is provided on the top of the air box cabinet, and the heat exchange assembly includes a plate-fin heat exchanger, a ventilation assembly, an air inlet pipeline and an air outlet pipeline. The ventilation assembly is located between the plate-fin heat exchanger and the air box cabinet, and the plate-fin heat exchanger leans against the ventilation assembly. The air inlet of the plate-fin heat exchanger is communicated with the interior of the air box cabinet through the air inlet pipeline, and the air outlet of the plate-fin heat exchanger is communicated with the interior of the air box cabinet through the air outlet pipeline.

2. The ring main unit gas box for heat dissipation according to claim 1, characterized in that: The ventilation component includes a cross flow fan, a supporting inclined plate and a supporting connecting plate. The supporting inclined plates are respectively provided on both sides of the cross flow fan. The ends of the supporting inclined plates are connected to each other through the supporting connecting plates. The plate-fin heat exchanger is arranged on the supporting inclined plates, and the air outlet of the cross flow fan faces the plate-fin heat exchanger.

3. The ring main unit gas box for heat dissipation according to claim 2 is characterized in that: The ventilation assembly also includes an air inlet box, the air outlet of the air inlet box is opened on the supporting connecting plate, the air inlet of the air inlet box faces the side where the back plate of the air box cabinet is located, and a partition is also provided between the supporting inclined plates, and the partition is located between the air inlet box and the air outlet of the cross flow fan.

4. The ring main unit gas box for heat dissipation according to claim 1 is characterized in that: The gas box cabinet comprises a top plate, a back plate and a bottom plate, wherein the top plate, the back plate and the bottom plate are connected by reinforcing ribs, the reinforcing ribs are located inside the gas box cabinet, and the reinforcing ribs are made of channel steel.

5. The ring main unit gas box for heat dissipation according to claim 4, characterized in that: The air inlet pipeline includes an air pump and an air inlet pipe. The air inlet of the air pump is opened on the top plate, and the air outlet of the air pump is connected to the air inlet of the plate-fin heat exchanger through the air inlet pipe.

6. The ring main unit gas box for heat dissipation according to claim 4, characterized in that: The air outlet pipeline includes a hose and a through hole, the through hole is opened on the top plate, a sealing ring is provided at the through hole, the air inlet of the hose is connected with the air outlet of the plate-fin heat exchanger, the air outlet of the hose passes through the through hole and extends to the lower half of the air box cabinet, and the hose is arranged along the reinforcing ribs.

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