Heat dissipation and ventilation mechanism and box-type substation comprising same

Abstract

The invention relates to the technical field of heat dissipation, and particularly discloses a heat dissipation and ventilation mechanism and a box-type substation comprising the heat dissipation and ventilation mechanism. The heat dissipation and ventilation mechanism comprises a shell, a plurality of ventilation openings are formed in the peripheral side of the shell, a rotating shaft is rotationally matched in the shell, a shifting rod is arranged on the rotating shaft, and a plurality of baffles are slidably matched in the shell; the top of the shell is provided with a detection plate, the top of the shell is provided with a sensor, the detection plate is rotatably matched with a wind indicator, the wind indicator is provided with a sliding rod, the top of the shell is provided with an annular sliding groove, and the annular sliding groove is internally provided with a plurality of contact switches which are distributed at intervals in the circumferential direction of the annular sliding groove. A stop block is arranged below each ventilation opening in a sliding fit mode, and each stop block is provided with a push rod. According to the heat dissipation and ventilation mechanism and the box-type transformer substation comprising the heat dissipation and ventilation mechanism, heat dissipation can be carried out in rainy days, and rainwater can be prevented from entering the transformer substation.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation, and in particular to a heat dissipation and ventilation mechanism and a box-type substation comprising the heat dissipation and ventilation mechanism. Background Art

[0002] A box-type substation is a substation that integrates high-voltage switchgear, transformers, low-voltage power distribution equipment, protection equipment and auxiliary equipment in one or several compact boxes. Due to the heat generated by the electrical equipment in the station, the internal temperature of the box-type substation is usually higher than the outside. Excessive temperature will interfere with the normal operation of high and low voltage switchgear and components. Therefore, it is urgent to solve the heat dissipation problem.

[0003] A Chinese patent with authorization announcement number CN113161892B discloses a ventilation, heat dissipation and rainproof outdoor distribution box, which includes supporting legs, a lower shell, a connecting shell, an upper shell, a lower door frame, a connecting door frame, an upper door frame, hinges, handles, and telescopic rods. The lower shell is installed on the top of the supporting legs, the connecting shell is integrally formed on the top of the lower shell, and the upper shell is installed on the top of the lower shell. The upper shell can move up and down through the connecting shell, the connecting door frame is integrally formed on the top of the lower door frame, and the upper door frame is installed on the top of the lower door frame. The upper door frame can move up and down through the connecting door frame, the lower door frame and the upper door frame are respectively connected to the lower shell and the upper shell by hinges, and handles are installed on the lower door frame and the upper door frame, and a telescopic rod is installed between the handles.

[0004] The top lifting device of the above patent has the effect of heat dissipation and ventilation, and the lifting device can be controlled by the top control device to be closed when it rains to prevent moisture in the distribution box. However, closing the top lifting device when it rains will lead to poor heat dissipation inside the distribution box, affecting the operation of internal components. If the vents are not closed, rain is usually accompanied by wind, and rainwater can tilt into the vents under the action of wind, thereby causing damage to internal components. Summary of the invention

[0005] The present invention provides a heat dissipation and ventilation mechanism and a box-type substation including the heat dissipation and ventilation mechanism, aiming to solve the problem in the related art that the vents need to be closed on rainy days, resulting in poor heat dissipation effect.

[0006] The heat dissipation and ventilation mechanism of the present invention comprises: a housing; The outer shell is provided with a plurality of ventilation openings on its periphery; A rotating shaft is rotatably matched in the shell, a driving member is arranged in the rotating shaft, and the driving member is used to drive the rotating shaft to rotate. A lever is arranged on the rotating shaft. A plurality of baffles are slidably matched in the shell, each of the baffles corresponds to one of the vents, a chamfered groove is arranged on the baffle, the lever can stop against the chamfered groove, and the lever can push the baffle to move until it covers the corresponding vent. A detection plate is arranged on the top of the shell, the detection plate is elastically connected to the shell, a sensor is arranged on the top of the shell, the sensor can stop against the detection plate, and the sensor is electrically connected to the driving member. A wind vane is rotatably matched on the detection plate, a sliding rod is arranged on the wind vane, an annular groove is arranged on the top of the shell, a plurality of contact switches spaced along its circumference are arranged in the annular groove, the sliding rod is slidably matched in the annular groove, and can stop against the contact switch, a stopper is slidably matched under each of the vents, each of the stoppers is provided with a push rod, and each push rod is electrically connected to the corresponding contact switch.

[0007] Beneficial effect: when it rains, rain falls on the detection plate. Under the action of rain gravity, the detection plate moves downward and contacts the sensor. The sensor transmits an electrical signal to the rotating shaft, and the rotating shaft drives the lever to rotate. When the lever contacts the baffle, the lever moves along the inclined groove and pushes the baffle to move upward. When the lever is separated from the baffle, the baffle moves downward under the action of gravity, so that the baffle can periodically close the vent. If it is raining and there is wind, the weather vane rotates under the action of wind, so that the sliding rod moves to the direction toward the wind direction, the sliding rod stops with the contact switch at the corresponding position, the contact switch stops with the corresponding push rod, and the push rod pushes the stop block to move so that it can stop with the bottom end of the baffle. After the baffle at the vent facing the wind direction is closed, its bottom end stops with the stop block, thereby ensuring that the vent facing the wind direction is always in a closed state, preventing rain from tilting into the shell under the action of wind.

[0008] Preferably, the outer shell is also provided with a plurality of water absorption plates distributed at intervals, the water absorption plates are located on the inner side of the baffle, each of the water absorption plates corresponds to one of the vents, a driving ring is slidably fitted in the outer shell, a limit block is provided on the water absorption plate, the limit block abuts against the top end of the driving ring, a threaded groove is provided on the rotating shaft, a moving ring is slidably fitted on the rotating shaft, a slider is provided on the inner side of the moving ring, the slider slidably fits in the threaded groove, and the moving ring is connected to the driving ring through a connecting rod.

[0009] The effect is that the rotating shaft can drive the moving ring to move upward during the rotation process, the driving ring and the moving ring move upward synchronously, and push the water absorption plate to move upward, so that the water absorption plate can cover the vent, and the water absorption plate can absorb moisture in the air to ensure that the air entering the shell is dry.

[0010] Preferably, a telescopic rod is slidably fitted at the end of the lever, the telescopic rod is elastically connected to the lever, the telescopic rod can move along the axial direction of the lever, and the telescopic rod can abut against the water absorption plate or the baffle.

[0011] Preferably, a filter plate is provided on the outer side of the vent.

[0012] The effect is that the filter plate can filter the air entering the housing, preventing impurities from entering the housing along with the air.

[0013] Preferably, a brush is provided on the top of the baffle plate, and the brush can abut against the filter plate.

[0014] The effect is that the up and down movement of the baffle can drive the brush to clean the filter plate to prevent the filter plate from being blocked.

[0015] Preferably, the brush is rotationally matched with the baffle, and a driving wheel is provided on the brush, and the driving wheel is frictionally matched with the shell.

[0016] The effect is that the brush can rotate during the up and down movement, further improving the cleaning effect.

[0017] Preferably, a water storage tank is provided on the peripheral side of the detection plate, the side wall of the outer shell has an outer wall and an inner wall, a partition plate is provided inside the outer shell, a drainage cavity is formed between the partition plate and the outer wall, a water hole is provided on the inner wall, the water hole can connect the drainage cavity and the water storage tank, and the outer wall is provided with a first drainage outlet at the drainage cavity.

[0018] Preferably, an annular cavity is further provided on the outer wall, a water outlet is provided on the partition plate, the annular cavity is connected to the water outlet, a floating plate is slidably fitted in the annular cavity, the floating plate can stop against the bottom end of the baffle, and a second drain outlet is provided on the outer wall of the annular cavity.

[0019] A box-type substation comprises a box body, internal components and any one of the heat dissipation and ventilation mechanisms described above, wherein the heat dissipation and ventilation mechanism is arranged on the top of the box body and communicated with the inside of the box body, and the internal components are arranged in the box body.

[0020] By adopting the above technical solution, the beneficial effects of the present invention are: According to the heat dissipation and ventilation mechanism of the present invention, when it rains, rain falls on the detection plate. Under the action of the gravity of the rain, the detection plate moves downward and contacts with the sensor. The sensor transmits the electrical signal to the rotating shaft, and the rotating shaft drives the lever to rotate. When the lever contacts the baffle, the lever moves along the inclined groove and pushes the baffle to move upward. When the lever is separated from the baffle, the baffle moves downward under the action of gravity, so that the baffle can periodically close the vent. If it is raining and there is wind, the weather vane rotates under the action of wind force, so that the sliding rod moves to the direction toward the wind direction, the sliding rod stops with the contact switch at the corresponding position, the contact switch stops with the corresponding push rod, and the push rod pushes the stop block to move so that it can stop with the bottom end of the baffle. After the baffle at the vent facing the wind direction is closed, its bottom end stops with the stop block, thereby ensuring that the vent facing the wind direction is always in a closed state, preventing rain from tilting into the shell under the action of wind force. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the heat dissipation and ventilation mechanism of an embodiment of the present invention.

[0022] Figure 2 It is a cross-sectional view of the heat dissipation and ventilation mechanism according to an embodiment of the present invention.

[0023] Figure 3 Schematic diagram of baffle driving according to an embodiment of the present invention.

[0024] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0025] Figure 5 Schematic diagram of driving the water absorption plate according to an embodiment of the present invention.

[0026] Figure 6 It is a schematic diagram of the partial structure of the heat dissipation and ventilation mechanism of an embodiment of the present invention.

[0027] Figure 7 Schematic diagram of the floating plate structure of an embodiment of the present invention.

[0028] Figure 8 It is a schematic diagram of the structure of a box-type substation according to an embodiment of the present invention.

[0029] Reference numerals: 100. heat dissipation and ventilation mechanism; 200. box body; 1. Shell; 101. Outer wall; 102. Inner wall; 103. Partition plate; 2. Rotating shaft; 3. Mounting seat; 4. Baffle; 41. Bevel groove; 5. Push rod; 51. Telescopic rod; 6. Detection plate; 61. Water storage tank; 611. Water hole; 7. Sensor; 8. Weather vane; 81. Sliding rod; 9. Contact switch; 10. Block; 11. Push rod; 12. Water absorption plate; 13. Drive ring; 14. Moving ring; 15. Filter plate; 16. Brush; 17. Drive wheel; 18. Limit rod; 19. Annular cavity; 20. Floating plate; 21. Drainage cavity. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] like Figures 1 to 7 As shown, the heat dissipation and ventilation mechanism of the present invention comprises: a housing 1.

[0032] Specifically, Figure 1 and Figure 2 As shown, the outer shell 1 is provided with four vents evenly spaced along the circumference thereof, the side wall of the outer shell 1 has an outer wall 101 and an inner wall 102, a partition plate 103 is provided inside the outer shell 1, the partition plate 103 is an annular plate, and together with the outer wall 101, a drainage cavity 21 is formed at the upper part of the outer shell 1, and the outer wall 101 is provided with a first drainage port at the drainage cavity 21. Four baffles 4 are provided between the inner wall 102 and the outer wall 101, and each baffle 4 corresponds to a vent, a rotating shaft 2 is provided inside the outer shell 1, a mounting seat 3 is provided at the bottom of the outer shell 1, the mounting seat 3 is fixedly connected to the inner wall 102 of the outer shell 1, the rotating shaft 2 is rotatably engaged with the mounting seat 3, a driving member is provided inside the rotating shaft 2, the driving member is a motor, and is used to drive the rotating shaft 2 to rotate, a lever 5 is fixedly connected to the rotating shaft 2, and a telescopic rod 51 is slidably engaged at the end of the lever 5, the telescopic rod 51 is elastically connected to the lever 5 through a spring, and the telescopic rod 51 can move along the axial direction of the lever 5. A bevel groove 41 is provided on the baffle 4, and the end of the telescopic rod 51 can abut against the bevel groove 41. When the rotating shaft 2 rotates, the lever 5 drives the telescopic rod 51 to rotate around the axis of the rotating shaft 2. When the telescopic rod 51 abuts against the baffle 4, the telescopic rod 51 moves along the bevel groove 41 and pushes the baffle 4 to move upward. When the telescopic rod 51 is about to separate from the baffle 4, the baffle 4 moves to the uppermost end, and the baffle 4 can close the vent. After the lever 5 separates from the baffle 4, the baffle 4 moves downward under the action of gravity.

[0033] like Figures 2 to 4As shown, a detection plate 6 is provided at the top of the housing 1, and the detection plate 6 is elastically connected to the housing 1 through a spring, and the detection plate 6 can move up and down. A sensor 7 is provided at the top of the housing 1, and the sensor 7 is a pressure sensor 7, and the sensor 7 is electrically connected to the driving member through an electric wire. A water storage tank 61 is provided on the peripheral side of the detection plate 6, and the water storage tank 61 is an annular groove. When it rains, rainwater will accumulate in the water storage tank 61, and the gravity of the rainwater pushes the detection plate 6 to move downward until it contacts the sensor 7, and the sensor 7 transmits the electrical signal to the driving member, and the driving member drives the rotating shaft 2 to rotate. A wind vane 8 is also rotatably fitted on the detection plate 6, and a sliding rod 81 is fixedly connected to the wind vane 8. An annular groove is also provided on the top of the shell 1, and the sliding rod 81 is slidably fitted in the annular groove. A plurality of contact switches 9 are provided on the side wall of the annular groove and are distributed at intervals along its circumference. Each contact switch 9 corresponds to a vent, and a block 10 is slidably fitted below the vent. The block 10 can pass through the outer wall 101 and enter between the inner wall 102 and the outer wall 101. A push rod 11 is provided on the outside of the outer wall 101. The push rod 11 and the block 10 are elastically connected by a spring. The push rod 11 is used to push the block 10 to move, and each push rod 11 is electrically connected to the corresponding contact switch 9 through an electric wire. When the wind blows, the weather vane 8 drives the sliding rod 81 to rotate in the annular sliding groove, so that the sliding rod 81 stops against the contact switch 9 facing the wind direction, and the contact switch 9 activates the corresponding push rod 11, so that the block 10 extends between the inner wall 102 and the outer wall 101. When the baffle 4 moves upward under the push of the lever 5, the baffle 4 can pass over the block 10 and close the vent facing the wind direction. The bottom end of the baffle 4 stops against the block 10 to prevent the baffle 4 from moving downward.

[0034] like Figure 2 and Figure 5 As shown, the outer side of the inner wall 102 is slidably matched with four water-absorbing plates 12 evenly spaced along the circumference of the inner wall 102. The water-absorbing plates 12 are made of sodium polyacrylate, which can absorb water in a humid environment and drain water in a dry environment. Each water-absorbing plate 12 corresponds to a vent. The inner side of the inner wall 102 is slidably matched with a driving ring 13. The top of the water-absorbing plate 12 is provided with a limit block, and the limit block and the top of the driving ring 13 are stopped. The side wall of the rotating shaft 2 is provided with a threaded groove, and the rotating shaft 2 is slidably matched with a moving ring 14, and the inner side of the moving ring 14 is provided with a sliding The slider is slidably fitted in the threaded groove, and the moving ring 14 is fixedly connected to the driving ring 13 through a connecting rod. When the rotating shaft 2 rotates, the moving ring 14 can move up and down along the axial direction of the rotating shaft 2, and the driving ring 13 and the moving ring 14 move up and down synchronously. When the driving ring 13 moves upward, it will push the water absorption plate 12 to move upward, so that the water absorption plate 12 can cover the vent. When the moving ring 14 moves to the upper end of the threaded groove, the moving ring 14 and the rotating shaft 2 rotate synchronously, and the driving ring 13 and the moving ring 14 rotate synchronously, and the driving ring 13 will rotate relative to the water absorption plate 12.

[0035] like Figure 2 and Figure 6 As shown, the vent is provided with a filter plate 15 on the outside of the outer wall 101, and the top of the baffle plate 4 is also rotatably equipped with a brush 16, and a driving wheel 17 is fixedly connected to the brush 16. A limiting rod 18 is provided between the outer wall 101 and the inner wall 102, and the driving wheel 17 can frictionally cooperate with the limiting rod 18, and the brush 16 can stop against the filter plate 15. When the baffle plate 4 moves up and down, the driving wheel 17 moves along the limiting rod 18 and drives the brush 16 to rotate. The brush 16 can clean the filter plate 15 to prevent the filter plate 15 from being blocked.

[0036] like Figure 2 and Figure 7 As shown, a water hole 611 is also provided on the inner wall 102, and the water hole 611 can be connected to the water tank 61, and the drainage chamber 21 is connected to the water tank 61 through the water hole 611. An annular chamber 19 is provided on the outer side of the outer wall 101, and a water port is provided on the partition plate 103. The drainage chamber 21 is connected to the annular chamber 19 through the water port. A floating plate 20 is provided in the annular chamber 19. The floating plate 20 is an annular plate, which can pass through the outer wall 101 and extend between the inner wall 102 and the outer wall 101, and stop at the bottom end of the baffle 4.

[0037] like Figure 8 As shown, the box-type substation of the embodiment of the present invention includes a box body 200, internal components and a heat dissipation and ventilation mechanism 100. The internal components are arranged in the box body 200, and the heat dissipation and ventilation mechanism 100 is arranged on the top of the box body 200 and communicated with the inside of the box body 200.

[0038] When it rains, rainwater accumulates in the water storage tank 61, and the gravity of the rainwater pushes the detection plate 6 to move downward until it contacts the sensor 7. The sensor 7 transmits an electrical signal to the driving member, and the driving member drives the shaft 2 to rotate. The lever 5 drives the telescopic rod 51 to rotate around the axis of the shaft 2. When the telescopic rod 51 stops with the baffle 4, the telescopic rod 51 moves along the inclined groove 41 and pushes the baffle 4 to move upward. When the telescopic rod 51 is about to be separated from the baffle 4, the baffle 4 moves to the uppermost end, and the baffle 4 can close the vent. After the lever 5 is separated from the baffle 4, the baffle 4 moves downward under the action of gravity, so that the baffle 4 can periodically close the vent, while ensuring that the vent can enter the air, preventing rainwater from infiltrating the vent. The up and down movement of the baffle 4 will also drive the brush 16 to move up and down and rotate, thereby cleaning the filter plate 15 to prevent the filter plate 15 from being blocked. The rotation of the rotating shaft 2 will also drive the moving ring 14 to move upward, and the driving ring 13 and the moving ring 14 will move upward synchronously, thereby pushing the water absorption plate 12 to move upward until the water absorption plate 12 covers the vent. The water absorption plate 12 can absorb moisture in the air to ensure that the air entering the box 200 is in a dry state.

[0039] When it is raining and windy, the weather vane 8 drives the sliding rod 81 to rotate in the annular sliding groove, so that the sliding rod 81 stops against the contact switch 9 facing the wind direction, and the contact switch 9 activates the corresponding push rod 11, so that the block 10 extends into between the inner wall 102 and the outer wall 101. When the baffle 4 moves upward under the push of the lever 5, the baffle 4 can pass the block 10 and close the vent facing the wind direction. The bottom end of the baffle 4 stops against the block 10 to prevent the baffle 4 from moving downward, thereby closing the vent facing the wind direction and preventing rainwater from tilting and falling into the vent.

[0040] After the rain pushes the detection plate 6 to move to contact the sensor 7, the height of the detection plate 6 is lower than the water hole 611, and the water in the water storage tank 61 can enter the drainage chamber 21 from the water hole 611. Part of the water flows out from the first drainage port of the drainage chamber 21, and the other part of the water flows into the annular chamber 19 from the drainage chamber 21 through the water port, and flows out from the second drainage port of the annular chamber 19. When the rain is too heavy, it is difficult for the drainage chamber 21 and the annular chamber 19 to drain the water in time, causing the water level in the annular chamber 19 to gradually rise. The water in the annular chamber 19 drives the floating plate 20 to move upward through buoyancy, and the floating plate 20 drives the baffle 4 to move upward, thereby closing the vent to prevent rainwater from entering the housing 1.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A heat dissipation and ventilation mechanism, comprising: A shell, wherein a plurality of vents are provided on the periphery of the shell; The invention is characterized in that a rotating shaft is rotatably matched in the shell, a driving member is arranged in the rotating shaft, and the driving member is used to drive the rotating shaft to rotate, a lever is arranged on the rotating shaft, a plurality of baffles are slidably matched in the shell, each of the baffles corresponds to one of the vents, a bevel groove is arranged on the baffle, the lever can stop against the bevel groove, and the lever can push the baffle to move until it covers the corresponding vent, a detection plate is arranged on the top of the shell, the detection plate is elastically connected to the shell, a sensor is arranged on the top of the shell, the sensor can stop against the detection plate, the sensor is electrically connected to the driving member, a wind vane is rotatably matched on the detection plate, a sliding rod is arranged on the wind vane, an annular groove is arranged on the top of the shell, a plurality of contact switches spaced along the circumference thereof are arranged in the annular groove, the sliding rod is slidably matched in the annular groove, and can stop against the contact switch, a stopper is slidably matched under each of the vents, each of the stoppers is provided with a push rod, and each push rod is electrically connected to the corresponding contact switch.

2. The heat dissipation and ventilation mechanism according to claim 1, characterized in that: The outer shell is also provided with a plurality of water absorption plates distributed at intervals, the water absorption plates are located on the inner side of the baffle, each of the water absorption plates corresponds to one of the vents, a driving ring is slidably fitted in the outer shell, a limit block is provided on the water absorption plate, the limit block abuts against the top end of the driving ring, a threaded groove is provided on the rotating shaft, a moving ring is slidably fitted on the rotating shaft, a slider is provided on the inner side of the moving ring, the slider slidably fits in the threaded groove, and the moving ring is connected to the driving ring through a connecting rod.

3. The heat dissipation and ventilation mechanism according to claim 2, characterized in that: The end of the lever is slidably matched with a telescopic rod, the telescopic rod is elastically connected to the lever, the telescopic rod can move along the axial direction of the lever, and the telescopic rod can stop against the water absorption plate or the baffle.

4. The heat dissipation and ventilation mechanism according to claim 1, characterized in that: A filter plate is arranged on the outer side of the vent.

5. The heat dissipation and ventilation mechanism according to claim 4, characterized in that: A brush is provided on the top of the baffle plate, and the brush can abut against the filter plate.

6. The heat dissipation and ventilation mechanism according to claim 5, characterized in that: The brush is rotationally matched with the baffle, and a driving wheel is arranged on the brush, and the driving wheel is frictionally matched with the shell.

7. The heat dissipation and ventilation mechanism according to claim 1, characterized in that: A water storage tank is provided on the peripheral side of the detection plate, the side wall of the outer shell has an outer wall and an inner wall, a partition plate is provided inside the outer shell, a drainage cavity is formed between the partition plate and the outer wall, a water hole is provided on the inner wall, the water hole can connect the drainage cavity and the water storage tank, and the outer wall is provided with a first drainage outlet at the drainage cavity.

8. The heat dissipation and ventilation mechanism according to claim 7, characterized in that: The outer wall is also provided with an annular cavity, the partition plate is provided with a water outlet, the annular cavity is communicated with the water outlet, a floating plate is slidably fitted in the annular cavity, the floating plate can stop against the bottom end of the baffle, and a second drain outlet is provided on the outer wall of the annular cavity.

9. A box-type substation, characterized in that: It comprises a box body, internal components and the heat dissipation and ventilation mechanism according to any one of claims 1 to 8, wherein the heat dissipation and ventilation mechanism is arranged on the top of the box body and communicated with the inside of the box body, and the internal components are arranged in the box body.

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