Air box heat dissipation structure of high-voltage switch equipment

Abstract

The invention provides a gas tank heat dissipation structure of high-voltage switch equipment, which comprises a gas tank body and a circuit breaker assembly, and is characterized in that the circuit breaker assembly is fixed in the left side of the gas tank body; the air box heat dissipation structure further comprises a heat dissipation assembly. The lower end of the heat conduction cover is open, a partition plate is arranged in the heat conduction cover, the lower end of the heat conduction cover and the air box body at the edge of the ventilation hole are fixed and sealed in the circumferential direction, and an inner cavity of the heat conduction cover is communicated with the air box body through the ventilation hole; the partition plate divides an inner cavity of the heat conduction cover into an air inlet channel and an air outlet channel which are distributed left and right, the upper end of the air inlet channel is communicated with the upper end of the air outlet channel, the lower end of the air outlet channel is lower than the lower end of the air inlet channel, a plurality of heat conduction pipes are arranged in the air outlet channel, and each heat conduction pipe extends from back to front and is obliquely arranged. The two ends of each heat conduction pipe penetrate through the side wall of the heat conduction cover, then stretch out of the heat conduction cover and are sealed with the side wall of the heat conduction cover in the circumferential direction. The heat dissipation requirement of the circuit breaker assembly working under the large-current working condition can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage switchgear, and in particular to an air box heat dissipation structure of a high-voltage switchgear. Background Art

[0002] After the high-voltage switchgear is put into use, when a large current flows through the circuit breaker assembly in the high-voltage switchgear, the circuit breaker assembly will generate a large temperature rise. The rated working voltage of the existing high-voltage switchgear on the market is generally 40.5kV, and the rated working current is generally 3150A. The passive heat dissipation structure in the existing high-voltage switchgear can basically meet the heat dissipation requirements of the circuit breaker assembly under the existing rated working current; however, in order to adapt to the development of the times, the rated working current of the current high-voltage switchgear needs to be increased to 4000A, which means that the heat generation of the circuit breaker assembly is further increased, so that the passive heat dissipation structure in the existing high-voltage switchgear can no longer meet the heat dissipation requirements of the circuit breaker assembly. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an air box heat dissipation structure of a high-voltage switchgear, which can meet the heat dissipation requirements of a circuit breaker assembly operating under high current conditions.

[0004] The invention provides an air box heat dissipation structure of a high-voltage switchgear, comprising an air box body and a circuit breaker assembly, wherein the circuit breaker assembly is fixed inside the left side of the air box body; the air box heat dissipation structure also comprises a heat dissipation assembly; the heat dissipation assembly comprises a heat conductive cover with an opening at the lower end and a partition plate arranged inside, a ventilation hole is arranged at the top of the right side of the air box body, the heat conductive cover is located above the air box body, the lower end of the heat conductive cover is fixed to the air box body at the edge of the ventilation hole and is circumferentially sealed, and the inner cavity of the heat conductive cover is connected with the air box body through the ventilation hole; the partition plate divides the inner cavity of the heat conductive cover into an air inlet channel and an air outlet channel distributed on the left and right sides, 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, a plurality of heat conductive pipes are arranged in the air outlet channel, each heat conductive pipe extends from the back to the front and is arranged obliquely, and both ends of each heat conductive pipe penetrate the side wall of the heat conductive cover and then extend out of the heat conductive cover and are circumferentially sealed with the side wall of the heat conductive cover.

[0005] After the present invention adopts the above structure, when it is used, the circuit breaker assembly will generate a large temperature rise. The heat generated by the circuit breaker assembly when working will heat the gas in the air box body around the circuit breaker assembly. When the gas around the circuit breaker assembly and located in the air box body is heated, due to the principle of rising heated gas, the heated gas in the air box body will flow into the air outlet channel through the ventilation holes and the air inlet channel in sequence. After the heated gas enters the air outlet channel and heats the heat conducting pipe, the heat conducting pipe can heat the air in the heat conducting pipe. Since each heat conducting pipe extends from the back to the front and is arranged at an angle, the air in the external environment can flow through the heat conducting pipe (the hot air in the heat conducting pipe can diffuse into the external environment, and the external environment Cold air in the environment can be replenished into 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, and after the heated gas flowing through the air outlet channel is cooled, the cooled gas can flow back into the air box body, thereby realizing continuous cooling of the circuit breaker assembly located in the air box body; after adopting the above structure, the present invention can realize active cooling of the circuit breaker assembly located in the air box body, thereby meeting the heat dissipation requirements of the circuit breaker assembly working under high current conditions, and in addition, the above heat dissipation assembly is a purely physical heat dissipation assembly in a non-energy consumption form, which has the advantages of maintenance-free and energy-saving and environmental protection.

[0006] In a possible embodiment, an air guide hood is vertically arranged in the air box body below the air outlet channel, and the upper end of the air guide hood is fixed to the heat conductive hood at the lower end of the air outlet channel, and the lower end of the air guide hood is lower than the lower end of the air inlet channel. After adopting this structure, under the action of the air guide hood, the lower end of the air outlet channel can be made lower than the lower end of the air inlet channel, thereby further preventing the heated gas in the air box body from entering the air guide hood from the lower end of the air inlet channel, so that the heated gas in the air box body can enter the heat conductive hood more smoothly from the lower end of the air inlet channel, and the gas cooled by the heat dissipation component can flow back to the air box body more smoothly through the air outlet channel and the air guide hood, that is, the circulation of the gas in the air box body and the heat conductive hood can be promoted. In addition, under the action of the air guide hood, the gas cooled by the heat dissipation component can flow back to the inner bottom of the air box body more smoothly, so as to increase the range of gas circulation in the air box body.

[0007] In a possible implementation, a plurality of heat-conducting pipes form two rows that are spaced apart from each other, and the heat-conducting pipes in each row are spaced apart from each other from top to bottom, and the two rows of heat-conducting pipes are staggered in the vertical direction. By adopting this structure, the heat-conducting pipes can be staggered, so that when the heated gas flows through the air outlet channels at the plurality of heat-conducting pipes, the heated gas can fully exchange heat with the plurality of heat-conducting pipes, that is, the heat in the heated gas can be more reliably transferred to the heat-conducting pipes, and the heat-conducting pipes can also more reliably cool the heated gas. After the body flows through the air outlet channel at the heat conducting pipe to heat the heat conducting pipe, the heat conducting pipe can heat the air inside the heat conducting pipe, and since each heat conducting pipe extends from the back to the front and is arranged at an angle, the air in the external environment can flow through the heat conducting pipe (the hot air in the heat conducting pipe can diffuse into the external environment, and the cold air in the external environment can be replenished into the heat conducting pipe), that is, when the air in the external environment flows through the heat conducting pipe, the air in the external environment can cool the heat conducting pipe, that is, the heat conducting pipe can cool the heated gas flowing through the air outlet channel.

[0008] In a possible implementation, each heat-conducting pipe is in an inclined state with a lower rear end and a higher front end, and both ends of each heat-conducting pipe penetrate the side wall of the heat-conducting cover and then extend out of the heat-conducting cover and are welded and fixed to the side wall of the heat-conducting cover in a circumferential direction and sealed; after the heat-conducting pipe is heated, the heat-conducting pipe can heat the air in the heat-conducting pipe, and since each heat-conducting pipe is in an inclined state with a lower rear end and a higher front end, the hot air in the heat-conducting pipe can diffuse to the external environment through the front end of the heat-conducting pipe, and the external environment The cold air can be replenished into the heat pipe through the rear end of the heat pipe, so that the air in the external environment flowing through the heat pipe can cool the heat pipe, that is, the heat pipe can cool the heated gas flowing through the air outlet channel; in addition, since both ends of each heat pipe penetrate the side wall of the heat conductive cover and then extend out of the heat conductive cover and are circumferentially welded and sealed to the side wall of the heat conductive cover, the reliability of the circumferential seal between the end of each heat conductive pipe and the heat conductive cover can be ensured, that is, the airtightness of the inner cavity of the heat conductive cover can be ensured.

[0009] In a possible embodiment, a plurality of first heat sink fins are fixed on the outer top of the heat conductive cover, the plurality of first heat sink fins are in contact with the heat conductive cover for heat conduction, and the plurality of first heat sink fins are arranged vertically corresponding to the air outlet channel; through the arrangement of the first heat sink fins, after the heated gas from the air box body flows into the air outlet channel, the heat in the heated gas can also be conducted to the first heat sink fins through the heat conductive 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 a possible embodiment, a plurality of second heat sink fins are fixed on the outer wall of the heat conductive cover located on one side of the air outlet channel, and the plurality of second heat sink fins are in contact with the heat conductive cover for heat conduction; through the arrangement of the second heat sink fins, after the heated gas from the air box body flows into the air outlet channel, the heat in the heated gas can also be conducted to the second heat sink fins through the heat conductive 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 a possible embodiment, an annular flange is provided on the outer wall of the lower end of the heat conductive cover, and the heat conductive cover is fixed to the outer top of the air box body by a plurality of bolts which are passed through the annular flange and threadedly connected to the air box body, and the plurality of bolts are distributed at intervals along the circumferential direction of the annular flange; after adopting this structure, under the action of the annular flange and the plurality of bolts which are passed through the annular flange, the lower end of the heat conductive cover can be reliably fixed to the outer top of the air box body.

[0012] In a possible implementation, a sealing gasket is embedded between the annular flange and the outer top of the air box body, and the sealing gasket is used to seal the gap between the heat conductive cover and the air box body; after adopting this structure, under the action of the sealing gasket, the sealing gasket can reliably seal the gap between the heat conductive cover and the air box body to ensure the air tightness between the heat conductive cover and the air box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention;

[0014] Figure 2 is a schematic diagram of the three-dimensional structure of the heat dissipation component;

[0015] Figure 3 It is a schematic diagram of the main structure of the heat dissipation component;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the heat dissipation component. DETAILED DESCRIPTION

[0017] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0018] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0019] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0020] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figure 1-4 As shown, the embodiment of the present application discloses an air box heat dissipation structure of a high-voltage switchgear, including an air box body 1 and a circuit breaker assembly 2, wherein the circuit breaker assembly 2 is fixed inside the left side of the air box body 1; the air box heat dissipation structure also includes a heat dissipation assembly; the heat dissipation assembly includes a heat conductive cover 3 with an opening at the lower end and a partition 31 arranged inside, a ventilation hole 11 is arranged at the top of the right side of the air box body 1, the heat conductive cover 3 is located above the air box body 1, the lower end of the heat conductive cover 3 is fixed to the air box body 1 at the edge of the ventilation hole 11 and is circumferentially sealed, and the inner portion of the heat conductive cover 3 is provided with a heat conductive cover 3. The cavity is connected with the air box body 1 through the ventilation hole 11; the partition 31 divides the inner cavity of the heat-conducting 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, and a plurality of heat-conducting pipes 34 are arranged in the air outlet channel 33, each heat-conducting pipe 34 extends from the back to the front and is arranged obliquely, and both ends of each heat-conducting pipe 34 penetrate the side wall of the heat-conducting cover 3 and then extend out of the heat-conducting cover 3 and are circumferentially sealed with the side wall of the heat-conducting cover 3.

[0022] When the present invention is in use, the circuit breaker assembly will generate a large temperature rise. The heat generated when the circuit breaker assembly is working will heat the gas in the air box body around the circuit breaker assembly. When the gas around the circuit breaker assembly and located in the air box body is heated, due to the principle that the gas rises when heated, the heated gas in the air box body will flow into the air outlet channel through the ventilation holes and the air inlet channel in sequence. After the heated gas enters the air outlet channel and heats the heat conducting pipe, the heat conducting pipe can heat the air in the heat conducting pipe. Since each heat conducting pipe extends from the back to the front and is arranged at an angle, the air in the external environment can flow through the heat conducting pipe (the hot air in the heat conducting pipe can diffuse into the external environment, and the cold air in the external environment can diffuse into the external environment). Air can be replenished into 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, and after the heated gas flowing through the air outlet channel is cooled, the cooled gas can flow back into the air box body, thereby realizing continuous cooling of the circuit breaker assembly located in the air box body; after adopting the above structure, the present invention can realize active cooling of the circuit breaker assembly located in the air box body, thereby meeting the heat dissipation requirements of the circuit breaker assembly working under high current conditions, and in addition, the above heat dissipation assembly is a pure physical heat dissipation assembly in a non-energy-consuming form, which has the advantages of maintenance-free, energy-saving and environmental protection.

[0023] The air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33, and the air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33. The air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33, and the air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33. The air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33. The air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33. The air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33. The air inlet 32 ​​is provided with an air guide hood 35 at the bottom of the air outlet passage 33.

[0024] The plurality of heat conducting pipes 34 form two rows that are spaced apart from each other. The heat conducting pipes 34 in each row are spaced apart from each other from top to bottom, and the two rows of heat conducting pipes 34 are staggered in the vertical direction. By adopting this structure, the heat conducting pipes can be staggered, so that when the heated gas flows through the air outlet passages at the plurality of heat conducting pipes, the heated gas can fully exchange heat with the plurality of heat conducting pipes, that is, the heat in the heated gas can be more reliably transferred to the heat conducting pipes, and the heat conducting pipes can also more reliably cool the heated gas. When the heated gas flows through the air outlet passages at the plurality of heat conducting pipes, the heated gas can be fully exchanged with the plurality of heat conducting pipes. The air outlet channel at the heat conducting pipe is so that after the heat conducting pipe is heated, the heat conducting pipe can heat the air inside the heat conducting pipe, and because each heat conducting pipe extends from the back to the front and is arranged at an angle, the air in the external environment can flow through the heat conducting pipe (the hot air in the heat conducting pipe can diffuse into the external environment, and the cold air in the external environment can be replenished into the heat conducting pipe), that is, when the air in the external environment flows through the heat conducting pipe, the air in the external environment can cool the heat conducting pipe, that is, the heat conducting pipe can cool the heated gas flowing through the air outlet channel.

[0025] Each heat-conducting pipe 34 is in an inclined state with a lower rear end and a higher front end. Both ends of each heat-conducting pipe 34 penetrate the side wall of the heat-conducting cover 3 and then extend out of the heat-conducting cover 3 and are welded and sealed to the side wall of the heat-conducting cover 3 in a circumferential direction. After the heat-conducting pipe is heated, the heat-conducting pipe can heat the air in the heat-conducting pipe. Since each heat-conducting pipe is in an inclined state with a lower rear end and a higher front end, the hot air in the heat-conducting pipe can diffuse to the external environment through the front end of the heat-conducting pipe, and the cold air in the external environment Air can be added into the heat-conducting pipe through the rear end of the heat-conducting pipe, so that the air in the external environment flowing through the heat-conducting pipe can cool the heat-conducting pipe, that is, the heat-conducting pipe can cool the heated gas flowing through the air outlet channel; in addition, since both ends of each heat-conducting pipe penetrate the side wall of the heat-conducting cover and then extend out of the heat-conducting cover and are circumferentially welded and sealed to the side wall of the heat-conducting cover, the reliability of the circumferential seal between the end of each heat-conducting pipe and the heat-conducting cover can be ensured, that is, the airtightness of the inner cavity of the heat-conducting cover can be ensured.

[0026] A plurality of first heat sink fins 36 are fixed on the outer top of the heat conductive cover 3, and the plurality of first heat sink fins 36 are in contact with the heat conductive cover 3 for heat conduction, and the plurality of first heat sink fins 36 are arranged vertically corresponding to the air outlet channel 33; through the arrangement of the first heat sink fins, after the heated gas from the air box body flows into the air outlet channel, the heat in the heated gas can also be conducted to the first heat sink fins through the heat conductive cover, thereby improving the cooling efficiency and effect of the heat dissipation component on the heated gas flowing through the heat dissipation component.

[0027] A plurality of second heat sink fins 37 are fixed on the outer wall of the heat conductive cover 3 located on one side of the air outlet channel 33, and the plurality of second heat sink fins 37 are in contact with the heat conductive cover 3 for heat conduction; through the arrangement of the second heat sink fins, after the heated gas from the air box body flows into the air outlet channel, the heat in the heated gas can also be conducted to the second heat sink fins through the heat conductive 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 flange 38 is provided on the outer wall of the lower end of the heat-conducting cover 3, and the heat-conducting cover 3 is fixed to the outer top of the air box body 1 by a plurality of bolts which are passed through the annular flange 38 and threadedly connected to the air box body 1, and the plurality of bolts are distributed at intervals along the circumferential direction of the annular flange 38; after adopting this structure, under the action of the annular flange and the plurality of bolts which are passed through the annular flange, the lower end of the heat-conducting cover can be reliably fixed to the outer top of the air box body.

[0029] A sealing gasket 39 is embedded between the annular flange 38 and the outer top of the air box body 1, and the sealing gasket 39 is used to seal the gap between the heat-conducting cover 3 and the air box body 1; after adopting this structure, under the action of the sealing gasket, the sealing gasket can reliably seal the gap between the heat-conducting cover and the air box body to ensure the airtightness between the heat-conducting cover and the air box body.

[0030] In the present invention, the gas in the gas box body is SF6 (sulfur hexafluoride) gas.

[0031] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An air box heat dissipation structure of a high-voltage switchgear, comprising an air box body (1) and a circuit breaker assembly (2), wherein the circuit breaker assembly (2) is fixed inside the left side of the air box body (1); characterized in that: The air box heat dissipation structure further comprises a heat dissipation component; the heat dissipation component comprises a heat conductive cover (3) with an opening at the lower end and a partition (31) arranged inside; a ventilation hole (11) is arranged at the top of the right side of the air box body (1); the heat conductive cover (3) is located above the air box body (1); the lower end of the heat conductive cover (3) is fixed to the air box body (1) at the edge of the ventilation hole (11) and is circumferentially sealed; the inner cavity of the heat conductive cover (3) is connected to the air box body (1) via the ventilation hole (11); the partition (31) seals the inner cavity of the heat conductive 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), a plurality of heat conduction pipes (34) are arranged in the air outlet channel (33), each of the heat conduction pipes (34) extends from the back to the front and is arranged obliquely, and both ends of each of the heat conduction pipes (34) penetrate the side wall of the heat conduction cover (3) and then extend out of the heat conduction cover (3) and are circumferentially sealed with the side wall of the heat conduction cover (3).

2. The air box heat dissipation structure of the high-voltage switchgear according to claim 1 is characterized in that: An air guide cover (35) is vertically arranged in the air box body (1) below the air outlet channel (33); the upper end of the air guide cover (35) is fixed to the heat conductive cover (3) at the lower end of the air outlet channel (33); and the lower end of the air guide cover (35) is lower than the lower end of the air inlet channel (32).

3. The air box heat dissipation structure of the high-voltage switchgear according to claim 1, characterized in that: A plurality of the heat conducting tubes (34) form two rows that are spaced apart from each other. The heat conducting tubes (34) in each row are spaced apart from each other from top to bottom. The heat conducting tubes (34) in the two rows are staggered in the vertical direction.

4. The air box heat dissipation structure of the high-voltage switchgear according to claim 1 or 3, characterized in that: Each of the heat-conducting pipes (34) is in an inclined state with a lower rear end and a higher front end. Both ends of each of the heat-conducting pipes (34) penetrate the side wall of the heat-conducting cover (3), extend out of the heat-conducting cover (3), and are circumferentially welded to the side wall of the heat-conducting cover (3) and sealed.

5. The air box heat dissipation structure of the high-voltage switchgear according to claim 1, characterized in that: A plurality of first heat dissipation fins (36) are fixed on the outer top of the heat-conducting cover (3); the plurality of first heat dissipation fins (36) are in contact with the heat-conducting cover (3) for heat conduction; and the plurality of first heat dissipation fins (36) are arranged vertically corresponding to the air outlet channel (33).

6. The air box heat dissipation structure of the high-voltage switchgear according to claim 1 or 5, characterized in that: A plurality of 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 plurality of second heat dissipation fins (37) are in contact with the heat-conducting cover (3) for heat conduction.

7. The air box heat dissipation structure of the high voltage switchgear according to claim 1, characterized in that: An annular flange (38) is provided on the outer wall of the lower end of the heat-conducting cover (3), and the heat-conducting cover (3) is fixed to the outer top of the air box body (1) by means of a plurality of bolts which are inserted through the annular flange (38) and are threadedly connected to the air box body (1), and the plurality of bolts are distributed at intervals along the circumferential direction of the annular flange (38).

8. The air box heat dissipation structure of the high-voltage switchgear according to claim 7, characterized in that: A sealing gasket (39) is embedded between the annular flange (38) and the outer top of the air box body (1), and the sealing gasket (39) is used to seal the gap between the heat conductive cover (3) and the air box body (1).

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