Pressure relief radiator for gas insulation switch cabinet

Abstract

The utility model discloses a pressure relief radiator for a gas insulation switch cabinet, which comprises a radiating plate, a pressure relief disc, a protective cover, a supporting block and a rotating rod which are mutually combined for use, the protective cover is of a movable turnover structure, and the protective cover covers the surface of the pressure relief disc in a normal working state to play a role in preventing a rupture disk from being accidentally ruptured; when the rupture disk is ruptured to release pressure, the protective cover is jacked open by high-temperature and high-pressure airflow, meanwhile, the effect of blocking and guiding the airflow to be released in the safe direction is achieved, a certain gap is formed between every two adjacent radiating fins, the radiating area of the radiator can be increased, heat exchange between the interior of the air box and the outside is accelerated, the radiating efficiency of the radiator is improved, and the service life of the radiator is prolonged. And the rupture disk is arranged in the pressure relief disc, so that when the air pressure in the air tank rises to a dangerous value, the rupture disk is ruptured, and the inside of the air tank releases pressure to the outside, so that the air tank is prevented from exploding.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation of switch cabinets, in particular to a pressure relief radiator used for a gas insulated switch cabinet. Background Art

[0002] Gas-insulated switchgear is a commonly used equipment in power systems. It completely seals high-voltage live components such as circuit breakers and disconnectors in a gas box compartment, and fills the gas box compartment with inert insulating medium gas. It has the advantages of high insulation performance, small footprint and maintenance-free.

[0003] For example, a Chinese patent with publication number CN110475454B discloses a new type of air box heat dissipation cover plate, including a base, a heat conduction component and a pressure relief component; the base is installed on the outer wall of the cabinet, and a flow exchange port is opened in the middle of the base; the heat conduction component includes a panel and a connecting cover, and the panel and the connecting cover enclose a heat conduction cavity, and the heat conduction cavity communicates with the inner cavity of the cabinet through the flow exchange port; the outer surfaces of the panel and the connecting cover are connected with a plurality of heat dissipation plates, and a pressure relief port is opened in the middle of the connecting cover; the pressure relief component includes a dome-shaped bursting disc and a bursting baffle, the circular mouth of the dome-shaped bursting disc faces the pressure relief port, and the bursting baffle is arranged above the pressure relief port and connected to the connecting cover through a support. The present invention can dissipate heat for the air box under the premise of ensuring sealing, and prevent the explosion caused by excessive pressure in the air box by setting a pressure relief component, thereby ensuring the safety of the cabinet.

[0004] Another example is a Japanese patent with publication number JPH08140230A, which discloses a cover with a fan adjacent to a closed box and circulates external air, and also provides a heat pipe (wherein a heat receiving and heat dissipating component) to effectively cool the title cabinet without setting a fan in the cabinet, which is respectively set in the housing and the cover. Structure: When the circuit breaker 21 and the conductor 22 contained in the cabinet 2 generate heat, the internal insulating medium C is heated and introduced into the heat receiving portion 14a of the heat pipe 14, so that the working fluid of the heat pipe 14 moves to its heat dissipating portion 14b. When the fan 18 is driven, the external air D discharges the heat of the heat dissipating portion 14b to the outside. The vapor of the cooled working fluid returns to the heat receiving portion 14a. Therefore, the cabinet 2 can be effectively cooled without setting a fan in the cabinet 2.

[0005] When the electrical components inside the gas-insulated switchgear are powered on and working normally, the thermal effect of the current will cause the internal temperature of the gas-insulated switchgear to rise, which will seriously affect the working performance and service life of the switchgear. At the same time, as the internal temperature of the gas-insulated switchgear rises, the gas in the cabinet gradually expands, causing the air pressure in the cabinet to increase. If the air pressure cannot be released safely and in time, it will cause the switchgear to explode, bringing huge safety hazards and economic losses.

[0006] Gas-insulated switchgear usually adopts natural cooling or forced air cooling to solve the heat dissipation problem. The natural cooling method has low heat dissipation efficiency and takes a long time, and the time cost is too high. Although the forced air cooling method is efficient, it requires additional air cooling equipment, and the air cooling equipment may still need to be maintained later, which increases the economic cost.

[0007] In addition, the above heat dissipation methods cannot deal with the problem of explosion of the switch cabinet due to the inability to release pressure after the pressure increases, and cannot prevent the bursting disc from accidentally rupturing and block and guide the airflow to release in a safe direction. Therefore, they all have certain limitations. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides a pressure relief radiator for a gas insulated switch cabinet to solve the above problems.

[0009] In order to achieve the above objectives, the utility model is implemented through the following technical solutions.

[0010] A pressure relief radiator for a gas insulated switch cabinet comprises a heat sink, a pressure relief disc, a protective cover, a support block and a rotating rod. The heat sink is provided with a plurality of heat sinks, the pressure relief disc is fixed at the middle position of the heat sink, the protective cover is connected to the rotating rod, the rotating rod is rotatably connected to the support block, the support block is fixed on the heat sink, the protective cover is a movable flip structure, under normal working conditions, the protective cover covers the surface of the pressure relief disc, and plays a role in preventing the bursting disc from accidentally rupturing; when the bursting disc ruptures and releases pressure, the protective cover is pushed open by the high-temperature and high-pressure airflow, and at the same time plays a role in blocking and guiding the airflow to be released in a safe direction, the structure is simple, the manufacturing process is simple, the economy is high, the heat dissipation efficiency is high, the heat dissipation capacity of the gas insulated switch cabinet can be effectively improved, and the service life of the gas insulated switch cabinet is extended; the safety is high, while improving the heat dissipation capacity, the pressure relief and explosion-proof capacity are also achieved, and the safety of on-site personnel and the on-site environment are guaranteed; there is a certain gap between adjacent heat sinks, and this form can increase the heat dissipation area of ​​the radiator, accelerate the heat exchange between the inside of the gas box and the outside, and increase the heat dissipation efficiency of the radiator.

[0011] Preferably, the protective cover is rectangular at the top and circular at the bottom.

[0012] Preferably, the top of the protective cover is connected to the rotating rod.

[0013] Preferably, the circular shape and size below the protective cover are matched with the shape and size of the pressure relief disk.

[0014] Preferably, the heat sinks of the heat sink are distributed on both sides of the heat sink.

[0015] Preferably, gaps are provided between the heat sinks.

[0016] Preferably, a bursting disc is provided in the pressure relief disc. When the air pressure in the air box rises to a dangerous value, the bursting disc ruptures, releasing the pressure inside the air box to the outside, thereby avoiding explosion of the air box.

[0017] Preferably, the support block is fixed above the pressure relief disc.

[0018] Preferably, the support block is fixed on the left side of the pressure relief disk.

[0019] Preferably, the support block is fixed on the right side of the pressure relief disk.

[0020] Compared with the prior art, the utility model discloses a pressure relief radiator for a gas insulated switch cabinet, comprising a heat dissipation plate, a pressure relief disc, a protective cover, a support block, and a rotating rod, which are used in combination with each other to play a role.

[0021] ① The protective cover is a movable flip structure. Under normal working conditions, the protective cover covers the surface of the pressure relief disc to prevent the bursting disc from accidentally rupturing. When the bursting disc ruptures and releases pressure, the protective cover is pushed open by the high-temperature and high-pressure airflow, and at the same time, it blocks and guides the airflow to release in a safe direction.

[0022] ②Simple structure, simple manufacturing process, high economy, high heat dissipation efficiency, can effectively improve the heat dissipation capacity of the gas-insulated switchgear, and extend the service life of the gas-insulated switchgear; high safety, while improving the heat dissipation capacity, it also has pressure relief and explosion-proof capabilities, ensuring the safety of on-site personnel and on-site environment;

[0023] ③ There is a certain gap between adjacent heat sinks. This form can increase the heat dissipation area of ​​the radiator, speed up the heat exchange between the inside of the air box and the outside world, and increase the heat dissipation efficiency of the radiator;

[0024] ④ There is a bursting disc in the pressure relief disk. When the air pressure in the air box rises to a dangerous value, the bursting disc will rupture, releasing the pressure inside the air box to the outside, thereby avoiding the explosion of the air box. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model when the pressure relief radiator is installed for a gas insulated switch cabinet;

[0026] Figure 2 The utility model is a schematic structural diagram of a pressure relief radiator for a gas insulated switch cabinet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] A pressure relief radiator for a gas insulated switchgear comprises a heat sink 1, a pressure relief disc 2, a protective cover 3, a support block 4 and a rotating rod 5. The heat sink 1 is provided with a plurality of heat sinks, the pressure relief disc 2 is fixed at the middle of the heat sink 1, the protective cover 3 is connected to the rotating rod 5, and the rotating rod 5 is rotatably connected to the support block 4. Since the protective cover 3 is a movable flip structure, the protective cover 3 covers the surface of the pressure relief disc 2 under normal working conditions, thereby preventing the bursting disc from accidentally rupturing. When the bursting disc ruptures and releases pressure, the protective cover 3 is pushed open by the high-temperature and high-pressure airflow, while at the same time blocking and guiding the airflow to be discharged in a safe direction. The support block 4 is fixed on the heat sink 1. The protective cover 3 is rectangular on the top and circular on the bottom. The top of the protective cover 3 is connected to the rotating rod 5. The circular shape and size of the bottom of the protective cover 3 are matched with the shape and size of the pressure relief disk 2. The heat sinks of the heat sink 1 are distributed on both sides of the heat sink 1. Gaps are provided between the heat sinks. This form of gap can increase the heat dissipation area of ​​the heat sink 1, accelerate the heat exchange between the inside of the air box and the outside world, and increase the heat dissipation efficiency of the heat sink 1. A bursting disc is provided in the pressure relief disk 2. When the air pressure in the air box rises to a dangerous value, the bursting disc ruptures, allowing the pressure inside the air box to release to the outside world, thereby avoiding an explosion of the air box. The support block 4 is fixed above the pressure relief disk 2 and can be in a natural gravity drooping posture.

[0029] Example 2

[0030] Based on the condition that the other technical features mentioned above remain unchanged, the support block 4 is fixed on the left side of the pressure relief disk 2. Although the effect is not as good as above the pressure relief disk 2, it can also play a shielding role through a small buckle or by increasing the torque between the support block 4 and the rotating rod 5.

[0031] Example 3

[0032] Based on the condition that the other technical features mentioned above remain unchanged, the support block 4 is fixed on the right side of the pressure relief disk 2. Although the effect is not as good as above the pressure relief disk 2, it can also play a shielding role through a small buckle or by increasing the torque between the support block 4 and the rotating rod 5.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0035] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pressure relief radiator for a gas insulated switchgear, characterized in that: The invention comprises a heat sink (1), a pressure relief disc (2), a protective cover (3), a support block (4), and a rotating rod (5); the heat sink (1) is provided with a plurality of heat sinks; the pressure relief disc (2) is fixed at the middle of the heat sink (1); the protective cover (3) is connected to the rotating rod (5); the rotating rod (5) is rotatably connected to the support block (4); and the support block (4) is fixed on the heat sink (1).

2. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The protective cover (3) is rectangular at the top and circular at the bottom.

3. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The top of the protective cover (3) is connected to the rotating rod (5).

4. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The circular shape and size below the protective cover (3) are compatible with the shape and size of the pressure relief disc (2).

5. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The heat sinks of the heat sink (1) are distributed on both sides of the heat sink (1).

6. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: Gaps are arranged between the heat sinks.

7. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: A bursting disc is arranged inside the pressure relief disc (2).

8. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The support block (4) is fixed above the pressure relief disc (2).

9. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The support block (4) is fixed on the left side of the pressure relief disc (2).

10. The pressure relief radiator for a gas insulated switch cabinet according to claim 1, characterized in that: The support block (4) is fixed on the right side of the pressure relief disc (2).

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