Air box heat dissipation structure of high-voltage switch equipment
By introducing an active heat dissipation structure into high-voltage switchgear and utilizing the convection cooling design of a heat-conducting cover and inclined heat-conducting pipes, the heat dissipation problem of circuit breaker components under high current conditions is solved, achieving a highly efficient and energy-free cooling effect.
Patent Information
- Application Number
- CN202422994307.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing passive heat dissipation structure of high-voltage switchgear cannot meet the heat dissipation requirements of circuit breaker components under high current conditions, resulting in excessive temperature rise.
It adopts an active heat dissipation structure, including a heat conduction shroud, an air inlet channel, an air outlet channel, and an inclined heat conduction pipe. It utilizes the principle of gas thermal convection to achieve convection cooling, and combines heat dissipation fins and bolt fixing structure to ensure airtightness.
It achieves continuous cooling of circuit breaker components, meets the heat dissipation requirements under high current conditions, and is energy-free, maintenance-free, and energy-saving and environmentally friendly.
Smart Images
Figure CN223502457U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-voltage switchgear technology, and more specifically, to a gas box heat dissipation structure for high-voltage switchgear. Background Technology
[0002] After high-voltage switchgear is put into use, when a large current flows through the circuit breaker components inside the switchgear, the circuit breaker components will generate a significant temperature rise. The rated operating voltage of existing high-voltage switchgear on the market is generally 40.5kV, and the rated operating current is generally 3150A. The passive heat dissipation structure in existing high-voltage switchgear can basically meet the heat dissipation requirements of the circuit breaker components under the current rated operating current. However, in order to keep up with the development of the times, the rated operating current of high-voltage switchgear now needs to be increased to 4000A, which has further increased the heat generation of the circuit breaker components, to the point that the passive heat dissipation structure in existing high-voltage switchgear can no longer meet the heat dissipation requirements of the circuit breaker components. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a gas box heat dissipation structure for high-voltage switchgear, which can meet the heat dissipation requirements of circuit breaker components under high current conditions.
[0004] This utility model provides a gas box heat dissipation structure for high-voltage switchgear, including a gas box body and a circuit breaker assembly. The circuit breaker assembly is fixed inside the left side of the gas box body. The gas box heat dissipation structure also includes a heat dissipation component. The heat dissipation component includes a heat-conducting cover with an opening at the lower end and a partition inside. A ventilation hole is provided at the top right side of the gas box body. The heat-conducting cover is located above the gas box body. The lower end of the heat-conducting cover is fixed to the gas box body at the edge of the ventilation hole and is circumferentially sealed. The inner cavity of the heat-conducting cover is connected to the gas box body through the ventilation hole. The partition divides the inner cavity of the heat-conducting cover into an air inlet channel and an air outlet channel distributed to the left and right. The upper ends of the air inlet channel and the air outlet channel are connected. The lower end of the air outlet channel is lower than the lower end of the air inlet channel. Several heat-conducting pipes are provided in the air outlet channel. Each heat-conducting pipe extends from back to front and is inclined. Both ends of each heat-conducting pipe penetrate the side wall of the heat-conducting cover and extend out of the heat-conducting cover and are circumferentially sealed to the side wall of the heat-conducting cover.
[0005] By adopting the above-described structure, this utility model allows for a significant temperature rise in the circuit breaker assembly during operation. The heat generated by the circuit breaker assembly heats the gas inside the gas box surrounding it. Once heated, the heated gas rises and flows sequentially through the ventilation holes and air inlet into the air outlet. As the heated gas enters the air outlet and heats the heat-conducting pipes, the heat-conducting pipes heat the air within them. Because each heat-conducting pipe extends from back to front and is inclined, it allows air from the external environment to flow through the heat-conducting pipes (the hot air inside the heat-conducting pipes can diffuse into the external environment). The cold air in the environment can replenish the heat pipe. When the air in the external environment flows through the heat pipe, the air in the external environment can cool the heat pipe. That is, the heat pipe can cool the heated gas flowing through the air outlet channel. After the heated gas flowing through the air outlet channel is cooled, the cooled gas can flow back into the gas box, thereby achieving continuous cooling of the circuit breaker assembly located in the gas box. By adopting the above structure, this utility model can achieve active cooling of the circuit breaker assembly located in the gas box, thereby meeting the heat dissipation requirements of the circuit breaker assembly under high current conditions. In addition, the above heat dissipation component is a pure physical heat dissipation component with no energy consumption, which has the advantages of maintenance-free and energy-saving and environmentally friendly.
[0006] In one possible implementation, a vertically arranged air guide shroud is installed inside the air box located below the air outlet duct. The upper end of the air guide shroud is fixed to the heat conduction shroud at the lower end of the air outlet duct, and the lower end of the air guide shroud is lower than the lower end of the air inlet duct. With this structure, the lower end of the air outlet duct is lower than the lower end of the air inlet duct due to the action of the air guide shroud. This further prevents the heated gas inside the air box from entering the air guide shroud from the lower end of the air inlet duct. As a result, the heated gas inside the air box can enter the heat conduction shroud more smoothly from the lower end of the air inlet duct. The gas cooled by the heat dissipation components can also flow back to the air box more smoothly through the air outlet duct and the air guide shroud. This promotes the circulation of gas inside the air box and the heat conduction shroud. In addition, the air guide shroud allows the gas cooled by the heat dissipation components to flow back to the bottom of the air box more smoothly, thereby increasing the range of gas circulation inside the air box.
[0007] In one possible implementation, several heat pipes are arranged in two rows spaced apart from left to right. The heat pipes in each row are spaced apart from top to bottom, and the two rows are staggered vertically. This structure allows for the staggered distribution of the heat pipes, ensuring sufficient heat exchange between the heated gas and the heat pipes when the gas flows through the outlet channel. This means the heat in the heated gas is more reliably transferred to the heat pipes, and the heat pipes can more reliably cool the heated gas. The air flows through the outlet channel of the heat pipe to heat the heat pipe. The heat pipe heats the air inside the heat pipe. Since each heat pipe extends from back to front and is inclined, it allows air from the external environment to flow through the heat pipe (hot air inside the heat pipe can diffuse into the external environment, and cold air from the external environment can replenish the heat pipe). In other words, when air from the external environment flows through the heat pipe, it cools the heat pipe, which in turn cools the heated gas flowing through the outlet channel.
[0008] In one possible implementation, each heat pipe is inclined with a lower rear end and a higher front end. Both ends of each heat pipe penetrate the sidewall of the heat-conducting shroud and extend outside the shroud, where they are circumferentially welded and sealed. With this structure, after the heat pipes are heated, the air inside them is also heated. Because each heat pipe is inclined with a lower rear end and a higher front end, the hot air inside the heat pipes can diffuse to the external environment through the front end of the heat pipes. The cold air can be supplied to the heat pipe through the rear end of the heat pipe, thereby enabling the air in the external environment flowing through the heat pipe to cool the heat pipe. In other words, the heat pipe can cool the heated gas flowing through the air outlet channel. In addition, since both ends of each heat pipe penetrate through the side wall of the heat shroud and extend out of the heat shroud, and are circumferentially welded and sealed to the side wall of the heat shroud, the reliability of the circumferential seal between the end of each heat pipe and the heat shroud can be ensured, that is, the airtightness of the inner cavity of the heat shroud can be ensured.
[0009] In one possible implementation, several first heat dissipation fins are fixed on the outer top of the heat-conducting cover. These first heat dissipation fins are in contact with the heat-conducting cover for heat conduction, and are vertically aligned with the air outlet channel. Through the arrangement of the first heat dissipation fins, after the heated gas from the gas box flows into the air outlet channel, the heat in the heated gas can also be conducted to the first heat dissipation fins through the heat-conducting cover, thereby improving the cooling efficiency and effect of the heat dissipation component on the heated gas flowing through the heat dissipation component.
[0010] In one possible implementation, several second heat dissipation fins are fixed on the outer wall of the heat-conducting cover located on one side of the air outlet channel. The several second heat dissipation fins are in contact with the heat-conducting cover for heat conduction. Through the arrangement of the second heat dissipation fins, after the heated gas from the air box flows into the air outlet channel, the heat in the heated gas can also be conducted to the second heat dissipation fins through the heat-conducting cover, thereby improving the cooling efficiency and effect of the heat dissipation component on the heated gas flowing through the heat dissipation component.
[0011] In one possible implementation, an annular protrusion is provided on the outer wall of the lower end of the heat-conducting cover. The heat-conducting cover is fixed to the outer top of the gas box body by a number of bolts that pass through the annular protrusion and are threadedly connected to the gas box body. The number of bolts are distributed at intervals along the circumferential direction of the annular protrusion. With this structure, the lower end of the heat-conducting cover can be reliably fixed to the outer top of the gas box body by the action of the annular protrusion and the number of bolts passing through the annular protrusion.
[0012] In one possible implementation, a sealing gasket is embedded between the annular convex edge and the outer top of the gas box body. The sealing gasket is used to seal the gap between the heat conduction cover and the gas box body. With this structure, the sealing gasket can reliably seal the gap between the heat conduction cover and the gas box body under the action of the sealing gasket, so as to ensure the airtightness between the heat conduction cover and the gas box body. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model;
[0014] Figure 2 This is a three-dimensional structural diagram of the heat dissipation component;
[0015] Figure 3 This is a schematic diagram of the main structure of the heat dissipation component;
[0016] Figure 4 This is a cross-sectional view of the heat dissipation component. Detailed Implementation
[0017] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0018] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0019] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0020] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0021] See Figure 1-4 As shown in the figure, this application discloses a gas box heat dissipation structure for high-voltage switchgear, including a gas box body 1 and a circuit breaker assembly 2. The circuit breaker assembly 2 is fixed inside the left side of the gas box body 1. The gas box heat dissipation structure also includes a heat dissipation component. The heat dissipation component includes a heat-conducting cover 3 with an opening at the lower end and a partition 31 inside. A ventilation hole 11 is provided at the top right side of the gas box body 1. The heat-conducting cover 3 is located above the gas box body 1. The lower end of the heat-conducting cover 3 is fixed to the gas box body 1 at the edge of the ventilation hole 11 and circumferentially sealed. The inner part of the heat-conducting cover 3... The cavity is connected to the air box body 1 through the ventilation hole 11; the partition 31 divides the inner cavity of the heat conduction cover 3 into an air inlet channel 32 and an air outlet channel 33 distributed on the left and right. The upper ends of the air inlet channel 32 and the air outlet channel 33 are connected, and the lower end of the air outlet channel 33 is lower than the lower end of the air inlet channel 32. Several heat conduction pipes 34 are provided in the air outlet channel 33. Each heat conduction pipe 34 extends from back to front and is inclined. Both ends of each heat conduction pipe 34 penetrate the side wall of the heat conduction cover 3 and extend out of the heat conduction cover 3 and are circumferentially sealed to the side wall of the heat conduction cover 3.
[0022] In use, the circuit breaker assembly generates a significant temperature rise. The heat generated during operation heats the gas inside the gas chamber surrounding the circuit breaker assembly. As the heated gas rises due to the principle of heat, it flows sequentially through the ventilation holes and air inlet into the air outlet. Once the heated gas enters the air outlet and heats the heat-conducting pipes, the heat-conducting pipes heat the air within them. Because each heat-conducting pipe extends from back to front and is angled, it allows air from the external environment to flow through it (the hot air inside the heat-conducting pipes diffuses into the external environment, and the cool air in the external environment...). Air can be supplied to the heat pipe. When air from the external environment flows through the heat pipe, it cools the heat pipe, which in turn cools the heated gas flowing through the air outlet. After being cooled, the cooled gas flows back into the gas box, thus achieving continuous cooling of the circuit breaker assembly located inside the gas box. This invention, by adopting the above structure, achieves active cooling of the circuit breaker assembly located inside the gas box, thereby meeting the heat dissipation requirements of the circuit breaker assembly under high current conditions. Furthermore, the above heat dissipation component is a purely physical heat dissipation component with no energy consumption, offering advantages such as maintenance-free operation and energy saving.
[0023] A vertically arranged air guide shroud 35 is installed inside the air box 1 located below the air outlet duct 33. The upper end of the air guide shroud 35 is fixed to the heat conduction shroud 3 at the lower end of the air outlet duct 33, and the lower end of the air guide shroud 35 is lower than the lower end of the air inlet duct 32. With this structure, the lower end of the air outlet duct is lower than the lower end of the air inlet duct under the action of the air guide shroud, which further prevents the heated gas in the air box from entering the air guide shroud from the lower end of the air inlet duct. This allows the heated gas in the air box to enter the heat conduction shroud more smoothly from the lower end of the air inlet duct, and the gas cooled by the heat dissipation component can flow back to the air box more smoothly through the air outlet duct and the air guide shroud. This promotes the circulation of gas in the air box and the heat conduction shroud. In addition, under the action of the air guide shroud, the gas cooled by the heat dissipation component can flow back to the bottom of the air box more smoothly, thereby increasing the range of gas circulation in the air box.
[0024] Several heat pipes 34 are arranged in two rows spaced left to right. In each row, the heat pipes 34 are spaced from top to bottom, and the two rows are staggered vertically. This structure allows for the staggered distribution of the heat pipes, ensuring sufficient heat exchange between the heated gas and the heat pipes when the gas flows through the outlet channel. This means the heat in the gas is more reliably transferred to the heat pipes, and the heat pipes more reliably cool the gas. The air outlet channel at the heat pipe allows the heat pipe to be heated, and the heat pipe can heat the air inside the heat pipe. Since each heat pipe extends from back to front and is inclined, air from the external environment can flow through the heat pipe (hot air inside the heat pipe can diffuse into the external environment, and cold air from the external environment can replenish the heat pipe). That is, when air from the external environment flows through the heat pipe, the air in the external environment can cool the heat pipe, which means that the heat pipe can cool the heated gas flowing through the air outlet channel.
[0025] Each heat pipe 34 is inclined at the rear end and upward at the front end. Both ends of each heat pipe 34 penetrate the side wall of the heat conduction cover 3 and extend out of the heat conduction cover 3, where they are circumferentially welded and sealed. With this structure, after the heat pipes are heated, the air inside them is also heated. Because each heat pipe is inclined at the rear end and upward at the front end, the hot air inside the heat pipes can diffuse to the external environment through the front end, allowing the cool air in the external environment to escape. Air can be supplied to the heat pipe through the rear end of the heat pipe, thereby enabling the air in the external environment flowing through the heat pipe to cool it. In other words, the heat pipe can cool the heated gas flowing through the air outlet channel. In addition, since both ends of each heat pipe penetrate through the side wall of the heat shroud and extend out of the heat shroud, and are circumferentially welded and sealed to the side wall of the heat shroud, the reliability of the circumferential seal between the end of each heat pipe and the heat shroud can be ensured, that is, the airtightness of the inner cavity of the heat shroud can be ensured.
[0026] Several first heat dissipation fins 36 are fixed on the outer top of the heat conduction cover 3. The several first heat dissipation fins 36 are in contact with the heat conduction cover 3 for heat conduction. The several first heat dissipation fins 36 are vertically aligned with the air outlet channel 33. Through the arrangement of the first heat dissipation fins, after the heated gas from the air box flows into the air outlet channel, the heat in the heated gas can also be conducted to the first heat dissipation fins through the heat conduction cover, thereby improving the cooling efficiency and effect of the heat dissipation component on the heated gas flowing through the heat dissipation component.
[0027] Several second heat dissipation fins 37 are fixed on the outer wall of the heat conduction cover 3 located on one side of the air outlet duct 33. The several second heat dissipation fins 37 are in contact with the heat conduction cover 3 for heat conduction. Through the setting of the second heat dissipation fins, after the heated gas from the air box flows into the air outlet duct, the heat in the heated gas can also be conducted to the second heat dissipation fins through the heat conduction cover, thereby improving the cooling efficiency and effect of the heat dissipation component on the heated gas flowing through the heat dissipation component.
[0028] An annular protrusion 38 is provided on the outer wall of the lower end of the heat conduction cover 3. The heat conduction cover 3 is fixed to the outer top of the gas box 1 by a number of bolts that pass through the annular protrusion 38 and are threadedly connected to the gas box 1. The number of bolts are distributed at intervals along the circumferential direction of the annular protrusion 38. With this structure, the lower end of the heat conduction cover can be reliably fixed to the outer top of the gas box 1 by the action of the annular protrusion and the number of bolts passing through the annular protrusion.
[0029] A sealing gasket 39 is embedded between the annular protrusion 38 and the outer top of the gas box 1. The sealing gasket 39 is used to seal the gap between the heat conduction cover 3 and the gas box 1. With this structure, the sealing gasket can reliably seal the gap between the heat conduction cover and the gas box 1 under the action of the sealing gasket, so as to ensure the airtightness between the heat conduction cover and the gas box 1.
[0030] In this invention, the gas inside the gas box is SF6 (sulfur hexafluoride) gas.
[0031] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A gas-cooled heat dissipation structure for a high-voltage switchgear, comprising a gas-cooled housing (1) and a circuit breaker assembly (2), wherein the circuit breaker assembly (2) is fixed inside the left side of the gas-cooled housing (1); characterized in that: The air box heat dissipation structure also includes a heat dissipation component; the heat dissipation component includes a heat-conducting cover (3) with an opening at the lower end and a partition (31) inside; a ventilation hole (11) is provided on the top right side of the air box body (1); the heat-conducting cover (3) is located above the air box body (1); the lower end of the heat-conducting cover (3) is fixed to the air box body (1) at the edge of the ventilation hole (11) and circumferentially sealed; the inner cavity of the heat-conducting cover (3) is connected to the air box body (1) through the ventilation hole (11); the partition (31) separates the inner cavity of the heat-conducting cover (3). The cavity is divided into an air inlet channel (32) and an air outlet channel (33) distributed on the left and right. The upper ends of the air inlet channel (32) and the air outlet channel (33) are connected. The lower end of the air outlet channel (33) is lower than the lower end of the air inlet channel (32). Several heat conduction pipes (34) are provided in the air outlet channel (33). Each heat conduction pipe (34) extends from back to front and is inclined. Both ends of each heat conduction pipe (34) penetrate through the side wall of the heat conduction cover (3) and extend out of the heat conduction cover (3) and are circumferentially sealed with the side wall of the heat conduction cover (3).
2. The gas-box heat dissipation structure for high-voltage switchgear according to claim 1, characterized in that: A guide hood (35) is vertically installed inside the air box (1) located below the air outlet channel (33). The upper end of the guide hood (35) is fixed to the heat conduction cover (3) at the lower end of the air outlet channel (33), and the lower end of the guide hood (35) is lower than the lower end of the air inlet channel (32).
3. The gas-box heat dissipation structure for high-voltage switchgear according to claim 1, characterized in that: Several heat pipes (34) are arranged in two rows with left and right intervals. The heat pipes (34) in each row are arranged from top to bottom with intervals. The two rows of heat pipes (34) are staggered in the vertical direction.
4. The gas-cooled heat dissipation structure of the high-voltage switchgear according to claim 1 or 3, characterized in that: Each heat pipe (34) is inclined with a lower rear end and a higher front end. Both ends of each heat pipe (34) penetrate the side wall of the heat-conducting cover (3) and extend out of the heat-conducting cover (3), and are circumferentially welded and sealed to the side wall of the heat-conducting cover (3).
5. The gas-cooled heat dissipation structure of the high-voltage switchgear according to claim 1, characterized in that: Several first heat dissipation fins (36) are fixed on the outer top of the heat conduction cover (3). The several first heat dissipation fins (36) are in contact with the heat conduction cover (3) for heat conduction. The several first heat dissipation fins (36) are vertically aligned with the air outlet channel (33).
6. The gas-cooled heat dissipation structure of the high-voltage switchgear according to claim 1 or 5, characterized in that: Several second heat dissipation fins (37) are fixed on the outer wall of the heat-conducting cover (3) located on one side of the air outlet channel (33), and the several second heat dissipation fins (37) are in contact with the heat-conducting cover (3) for heat conduction.
7. The gas-cooled heat dissipation structure of the high-voltage switchgear according to claim 1, characterized in that: The outer wall of the lower end of the heat-conducting cover (3) is provided with an annular protrusion (38). The heat-conducting cover (3) is fixed to the outer top of the gas box body (1) by a number of bolts that pass through the annular protrusion (38) and are threadedly connected to the gas box body (1). The number of bolts are distributed at intervals along the circumferential direction of the annular protrusion (38).
8. The gas-box heat dissipation structure for high-voltage switchgear according to claim 7, characterized in that: A sealing gasket (39) is embedded between the annular protrusion (38) and the outer top of the gas box body (1). The sealing gasket (39) is used to seal the gap between the heat conduction cover (3) and the gas box body (1).