High reliability primary and secondary fusion complete ring network box

Abstract

The application relates to the technical field of ring network boxes, and provides a high-reliability primary-secondary fusion complete ring network box, which comprises a box body and a box door, the upper part and the lower part of the box body are respectively provided with an air outlet and an air inlet, a louver is installed at the air inlet, a movable plate is arranged at the air outlet, the movable plate is matched with the air outlet and keeps sealing, the movable plate and the inner wall of the air outlet are rotationally connected through a rotating shaft, the rotating shaft deviates from the center of the movable plate, the rotating shaft divides the movable plate into a long-force-arm section and a short-force-arm section, a torsional spring is installed on the rotating shaft, a flow guide cover is arranged in the box body, the flow guide cover is fixedly connected with the inner wall of the box body, the flow guide cover is trumpet-shaped with the top being small and the bottom being large, an air outlet nozzle is formed at the top of the flow guide cover, the air outlet nozzle is aligned with the long-force-arm section, and the flow guide cover is used for concentrating and guiding the hot air rising in the box body and acting on the long-force-arm section. The high-reliability primary-secondary fusion complete ring network box can reduce the impurities entering the box body while ensuring heat dissipation.

Description

Technical Field

[0001] This invention relates to the field of ring network box technology, specifically to a high-reliability integrated primary and secondary ring network box. Background Technology

[0002] A primary and secondary integrated ring main unit is a power distribution device that integrates the electrical functions of primary equipment with the monitoring, protection, and control functions of secondary equipment. During use, the electrical equipment inside the primary and secondary integrated ring main unit generates heat, causing the temperature inside the ring main unit to rise. To ensure that the equipment inside the unit is not damaged due to overheating, heat dissipation measures are required.

[0003] The current cooling method involves opening vents at the top of the ring main unit. Since hot air is less dense, it rises and is expelled through these vents. However, these vents are always open, allowing impurities from the outside air and rainwater to easily enter the ring main unit, affecting its normal operation and reducing its reliability. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a highly reliable integrated primary and secondary ring network box that can reduce the entry of external impurities into the box while ensuring heat dissipation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-reliability primary and secondary fusion ring network box, comprising a box body and a box door, wherein the upper and lower parts of the box body are respectively provided with an air outlet and an air inlet, a louver is installed at the air inlet, and a movable plate is provided at the air outlet, the movable plate is adapted to the air outlet and maintains a seal, the movable plate is rotatably connected to the inner wall of the air outlet by a rotating shaft, the rotating shaft is offset from the center of the movable plate, and the rotating shaft divides the movable plate into a long lever arm segment and a short lever arm segment; A torsion spring is installed on the rotating shaft. The first end of the torsion spring is fixedly connected to the inner wall of the air outlet, and the second end of the torsion spring is fixedly connected to the movable plate. The torsion spring keeps the movable plate in a closed state of the air outlet. The interior of the housing is equipped with a flow guide hood, which is fixedly connected to the inner wall of the housing. The flow guide hood is shaped like a trumpet, with a smaller top and a larger bottom. An air outlet is formed on the top of the flow guide hood, which is aligned with the long lever arm section. The flow guide hood is used to concentrate and guide the rising hot air inside the housing to act on the long lever arm section.

[0006] Furthermore, the flow guide shroud divides the interior of the box into an upper drainage chamber and a lower working chamber, and the side wall of the box is provided with a water outlet communicating with the upper drainage chamber.

[0007] Furthermore, it also includes a counterweight, which is fixedly installed on the top of the short lever arm segment.

[0008] Furthermore, it also includes a negative pressure mechanism, which includes a venturi tube, a negative pressure pipe, a connecting plate, an air collection hood, and a flow guiding assembly; The Venturi tube is horizontally positioned above the movable plate, and the Venturi tube has a throat. The negative pressure tube is longitudinally positioned above the long lever arm section. The negative pressure tube is connected to the throat and is used to guide the negative pressure of the throat to the top of the long lever arm segment; The connecting plate is arranged horizontally above the box body, and the connecting plate is fixedly connected to the box body by a support rod; The air collecting hood is flared in shape, wider at the top and narrower at the bottom. The air collecting hood is fixedly connected to the connecting plate, and the air collecting hood is connected to one end of the venturi tube through a connecting pipe. The airflow guiding component is used to guide the external airflow into the air collection hood.

[0009] Furthermore, the flow guiding assembly includes a top plate and a flow guiding block. The top plate is disposed above the air collecting hood and is fixedly connected to the support rod. The flow guiding block is fixedly installed on the top plate and extends into the air collecting hood. Multiple sides of the flow guiding block are formed with downwardly extending and inwardly inclined guide surfaces.

[0010] Furthermore, the lower end of the negative pressure tube abuts against the long lever arm section when the movable plate is flipped to a predetermined angle, thereby limiting the excessive flipping of the movable plate.

[0011] Furthermore, it also includes a rainproof assembly, which includes an arc-shaped baffle and an arc-shaped cover plate. The arc-shaped baffle is fixedly installed on the top of the box and surrounds the outside of the long lever arm section. The arc-shaped cover plate covers the arc-shaped baffle plate, and the arc-shaped cover plate is fixedly connected to the counterweight block through the rainproof baffle.

[0012] Furthermore, the outer side of the arc-shaped baffle and the inner wall of the arc-shaped cover plate form a side pressure cavity.

[0013] The beneficial effects of this invention are as follows: This invention provides a high-reliability primary and secondary integrated ring mesh box. By installing a movable plate at the air outlet, which is normally kept sealed by a torsion spring, the heat dissipation vent is kept closed under normal conditions, thus preventing external impurities and rainwater from entering the box. When the temperature inside the box rises and hot air accumulates, the movable plate opens to dissipate heat. After cooling, it automatically closes again under the action of the torsion spring and gravity, thus achieving both heat dissipation and protection. Simultaneously, an off-center rotating shaft divides the movable plate into a long lever arm segment and a short lever arm segment, and the air outlet of the horn-shaped guide shroud is aligned with the long lever arm segment. The rising hot air is concentrated on the longer lever arm side. With the help of torque amplification, the movable plate can be rotated with a relatively small thrust of hot air, which helps improve the reliability of the heat dissipation vent opening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention from a first perspective; Figure 2 This is a schematic diagram of the structure of the present invention from a second perspective; Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 for Figure 2 A schematic diagram of the structure after removing the curved cover plate and rain shield; Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle; Figure 6 This is a schematic diagram of the internal structure of the box. Figure 7 This is a schematic diagram of the internal three-dimensional structure of the box; Figure 8 This is a cross-sectional structural diagram of the rainproof component.

[0015] Reference numerals: 1-Box body, 2-Box door, 3-Air outlet, 4-Air inlet, 5-Louvre, 6-Water outlet, 7-Modible plate, 71-Long lever arm section, 72-Short lever arm section, 8-Rotating shaft, 9-Torsion spring, 10-Counterweight block, 11-Guide shroud, 111-Air outlet, 112-Guide surface, 12-Upper drainage chamber, 13-Lower working chamber, 20-Negative pressure mechanism, 21-Venturi tube, 211-Throat, 22-Negative pressure pipe, 23-Connecting plate, 24-Support rod, 25-Air collector shroud, 26-Connecting pipe, 27-Guide assembly, 271-Top plate, 272-Guide block, 30-Rainproof assembly, 31-Arc-shaped baffle, 32-Arc-shaped cover, 33-Rainproof plate, 34-Side pressure chamber. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0017] In this application, unless otherwise expressly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0018] In the description of this application, it should be understood that the terms "longitudinal", "horizontal", "level", "top", "bottom", "upper", "lower", "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0020] like Figures 1-8 As shown, this invention provides a high-reliability primary and secondary integrated ring main unit, including a housing 1 and a door 2. The upper part of the housing 1 has an air outlet 3, and the lower part has an air inlet 4. A louver 5 is installed at the air inlet 4. When the electrical equipment inside the housing 1 operates, it generates heat. The air inside the housing 1 becomes less dense after being heated and rises. Cooler outside air enters the housing 1 through the louver 5 and the air inlet 4, forming an upward airflow to dissipate heat. The above description is all prior art, and the specific structure will not be elaborated further here.

[0021] This invention includes a movable plate 7 at the air outlet 3. The shape and size of the movable plate 7 are adapted to the air outlet 3. When closed, the movable plate 7 can cover the air outlet 3 and maintain a seal with it. The movable plate 7 is rotatably connected to the inner wall of the air outlet 3 via a rotating shaft 8. The rotating shaft 8 is not located at the center of the movable plate 7, but is offset to one side, thereby dividing the movable plate 7 into a long lever arm segment 71 and a short lever arm segment 72. A torsion spring 9 is installed on the rotating shaft 8. The first end of the torsion spring 9 is fixedly connected to the inner wall of the air outlet 3, and the second end of the torsion spring 9 is fixedly connected to the movable plate 7. In the initial state, with the help of the force of the torsion spring 9 and the sealing force between the movable plate 7 and the air outlet 3, the movable plate 7 remains horizontal, and the air outlet 3 is in a closed state.

[0022] When the hot air inside the chamber 1 rises and accumulates to a certain level, it exerts an upward thrust on the long lever arm section 71. Because the rotating shaft 8 is offset from the center of the movable plate 7, the long lever arm section 71 has a relatively long lever arm relative to the rotating shaft 8. The thrust of the hot air at the long lever arm section 71 creates a large opening torque, which, through torque amplification, causes the movable plate 7 to rotate around the rotating shaft 8. The air outlet 3 then connects to the outside, allowing the hot air inside the chamber 1 to escape, thus completing heat dissipation. After the hot air is exhausted, the temperature and pressure inside the chamber 1 decrease. Under the combined action of its own weight and the torsion spring 9, the movable plate 7 returns to a horizontal state, and the air outlet 3 closes again.

[0023] In one embodiment, a counterweight 10 is fixedly installed on the top of the short lever arm segment 72. The counterweight 10 works together with the torsion spring 9 to facilitate the adjustment of the thrust required to open the movable plate 7 and to assist the movable plate 7 in reliably resetting.

[0024] A flow guide shroud 11 is installed inside the housing 1, and the flow guide shroud 11 is fixedly connected to the inner wall of the housing 1. The flow guide shroud 11 is funnel-shaped, with a smaller top and a larger bottom, and its lower surface forms a flow guide surface 112. The air outlet 111 at the top of the flow guide shroud 11 is aligned with the long lever arm section 71 of the movable plate 7. The flow guide shroud 11 divides the interior of the housing 1 into an upper drainage chamber 12 located at the top and a lower working chamber 13 located at the bottom. The electrical equipment is arranged in the lower working chamber 13. A water outlet 6 is opened on the upper part of the side wall of the housing 1, and the water outlet 6 is connected to the upper drainage chamber 12. The hot air in the lower working chamber 13 converges along the flow guide surface 112, is gathered by the smaller top and larger bottom flow guide shroud 11, and is discharged from the top air outlet 111. This concentrates the hot air flow onto the long lever arm section 71, which, in conjunction with the torque amplification effect of the offset rotating shaft 8, facilitates the opening of the movable plate 7 with a smaller hot air thrust.

[0025] In rainy weather, if a small amount of water enters through the gap between the movable plate 7 and the air outlet 3, it will fall into the upper drainage chamber 12 and be discharged from the box 1 through the water outlet 6 connected to the upper drainage chamber 12, thereby preventing water from entering the lower working chamber 13 from the air outlet 111.

[0026] In one embodiment, the ring network box further includes a negative pressure mechanism 20. The negative pressure mechanism 20 includes a Venturi tube 21, a negative pressure pipe 22, a connecting plate 23, an air collecting hood 25, and a flow guiding assembly 27. The connecting plate 23 is horizontally positioned above the box body 1, and is fixedly connected to the box body 1 by multiple support rods 24. The Venturi tube 21 is horizontally positioned above the movable plate 7, and has a throat 211 with a narrowed cross-section in its middle. The negative pressure pipe 22 is longitudinally positioned above the long lever arm section 71, and its upper end communicates with the throat 211 of the Venturi tube 21. The air collecting hood 25 is flared at the top and narrowed at the bottom and is fixedly connected to the connecting plate 23. The air collecting hood 25 is connected to one end of the Venturi tube 21 by a connecting pipe 26. The flow guiding assembly 27 is used to guide external airflow into the air collecting hood 25.

[0027] Under hot and windy conditions in summer, the outside wind enters the air collecting hood 25 under the action of the air guide component 27, passes through the connecting pipe 26, and enters the horizontally set Venturi tube 21. According to the Venturi effect, the airflow velocity increases and the pressure decreases when the airflow passes through the throat 211 with a narrow cross section, creating a negative pressure in the throat 211. This negative pressure is conducted through the negative pressure pipe 22, which is connected to the throat 211, to the top of the long lever arm section 71, generating an upward suction force on the long lever arm section 71. This suction force, together with the thrust of the hot air on the long lever arm section 71, makes it easier for the movable plate 7 to flip open, allowing the air outlet 3 to connect with the outside and dissipate heat. In this way, in addition to the thrust of the hot air itself, the movable plate 7 can also obtain an additional opening driving force provided by the outside wind. Furthermore, when the movable plate 7 flips to a predetermined angle, the lower end of the negative pressure pipe 22 abuts against the long lever arm section 71, which can prevent the movable plate 7 from continuing to rotate, thereby limiting the movable plate 7 from over-flipping.

[0028] The airflow guiding assembly 27 includes a top plate 271 and a guide block 272. The top plate 271 is positioned above the air collecting hood 25 and is fixedly connected to the support rod 24. The guide block 272 is fixedly mounted on the top plate 271 and extends into the air collecting hood 25. Multiple sides of the guide block 272 have downwardly extending and inwardly inclined guide surfaces. With the help of these surrounding guide surfaces, regardless of the direction from which the outside wind blows, it can be redirected and converge into the air collecting hood 25 under the guidance of the guide surfaces, thereby reducing the impact of wind direction changes on the air collection effect of the negative pressure mechanism 20.

[0029] In one embodiment, the ring cage further includes a rainproof assembly 30. The rainproof assembly 30 includes an arc-shaped baffle 31 and an arc-shaped cover 32. The arc-shaped baffle 31 is fixedly installed on the top of the cage body 1 and surrounds the outside of the long lever arm section 71; the arc-shaped cover 32 covers the arc-shaped baffle 31, and the arc-shaped cover 32 is fixedly connected to the counterweight block 10 through a rainproof plate 33. When the movable plate 7 is flipped, the negative pressure pipe 22 contacts the movable plate 7, and the hot air inside the cage body 1 is discharged through the air outlet 3, because the arc-shaped baffle 31 and the arc-shaped cover 32 surround the outside of the long lever arm section 71, external rainwater is not easily able to enter the cage body 1 through the gap between the long lever arm section 71 and the air outlet 3; even if some rainwater enters through the gap between the short lever arm section 72 and the air outlet 3, it will flow into the upper drainage chamber 12 and be discharged through the water outlet 6.

[0030] The movable plate 7, the arc-shaped baffle 31, the arc-shaped cover 32 and the rain shield 33 are all made of flame-retardant SMC composite material by compression molding, with a flame retardant rating of not less than UL94 V-0. The SMC material has excellent electrical insulation and weather resistance and anti-aging properties. It will not deform or rust after long-term outdoor use, and its light weight can ensure the sensitivity and reliability of the opening and closing action of the movable plate 7.

[0031] The outer side of the arc-shaped baffle 31 and the inner wall of the arc-shaped cover 32 enclose each other to form a side pressure cavity 34. During rainy weather, rainwater first overflows over the arc-shaped cover 32 and enters the side pressure cavity 34, and the water level in the side pressure cavity 34 gradually rises as the water inflow increases.

[0032] During the rise in water level, the water body generates hydrostatic pressure on the inner arc surface of the arc-shaped cover plate 32. The hydrostatic pressure is decomposed into radial and tangential components: the radial component has zero torque on the rotating shaft 8 and does not generate an opening thrust; only the tangential component generates a starting torque on the rotating shaft 8.

[0033] Compared to a straight cover, the presence of the curved cover 32 and the side pressure cavity 34 means that only the tangential component of the force creates a starting torque on the rotating shaft 8 in this structure. Therefore, rainwater accumulation is unlikely to open the curved cover 32, preventing external rainwater from entering the housing 1 through the gap between the long lever arm section 71 and the air outlet 3. Even if some rainwater does enter through the gap between the long lever arm section 71 and the air outlet 3, it will flow into the upper drainage cavity 12 and be discharged through the water outlet 6. Furthermore, this structure will not affect the normal discharge of hot air inside the housing 1.

[0034] The working process of this embodiment is as follows: The electrical equipment inside the housing 1 generates heat, and the hot air converges along the guide surface 112 of the guide shroud 11 and is concentrated on the long lever arm section 71 through the air outlet 111; when the thrust of the hot air reaches the opening torque, the movable plate 7 rotates around the offset pivot 8, and the hot air is discharged through the air outlet 3, while the outside cold air is replenished through the louvers 5; when there is wind outdoors, the guide assembly 27 guides the air from all directions into the air collector shroud 25 and sends it into the venturi tube 21. The negative pressure formed in the throat 211 is additionally applied to the long lever arm section 71 through the negative pressure tube 22, which assists in opening the movable plate 7. At the same time, the negative pressure tube 22 restricts the movable plate 7 from over-rotating; after the heat dissipation is completed, the movable plate 7 resets and closes the air outlet 3 under the action of the torsion spring 9, the counterweight 10 and gravity. The rainproof assembly 30, together with the upper drainage chamber 12 and the water outlet 6, achieves rainproofing and drainage. The above structures work together to enable the ring main unit to automatically open and close its heat dissipation vents without relying on electrical control components, which helps to improve the reliability of equipment operation.

[0035] It is worth noting that this invention does not use any electrical control components, and relies entirely on mechanical structures to achieve heat dissipation of the housing 1, resulting in higher reliability.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-reliability primary and secondary integrated ring network box, comprising a box body and a box door, wherein the upper and lower parts of the box body are respectively provided with an air outlet and an air inlet, and the air inlet is equipped with louvers, characterized in that: A movable plate is provided at the air outlet. The movable plate is adapted to the air outlet and keeps it sealed. The movable plate is rotatably connected to the inner wall of the air outlet by a rotating shaft. The rotating shaft is off-center from the center of the movable plate and divides the movable plate into a long lever arm segment and a short lever arm segment. A torsion spring is installed on the rotating shaft. The first end of the torsion spring is fixedly connected to the inner wall of the air outlet, and the second end of the torsion spring is fixedly connected to the movable plate. The torsion spring keeps the movable plate in a closed state of the air outlet. The interior of the housing is equipped with a flow guide hood, which is fixedly connected to the inner wall of the housing. The flow guide hood is shaped like a trumpet, with a smaller top and a larger bottom. An air outlet is formed on the top of the flow guide hood, which is aligned with the long lever arm section. The flow guide hood is used to concentrate and guide the rising hot air inside the housing to act on the long lever arm section.

2. The high-reliability primary and secondary integrated ring network box according to claim 1, characterized in that: The flow guide shroud divides the interior of the box into an upper drainage chamber and a lower working chamber, and the side wall of the box is provided with a water outlet that communicates with the upper drainage chamber.

3. The high-reliability integrated primary and secondary ring network box according to claim 1, characterized in that: It also includes a counterweight, which is fixedly installed on the top of the short lever arm segment.

4. The high-reliability primary and secondary integrated ring network box according to claim 1, characterized in that: It also includes a negative pressure mechanism, which comprises a venturi tube, a negative pressure pipe, a connecting plate, an air collector hood, and a flow guiding assembly; The Venturi tube is horizontally positioned above the movable plate, and the Venturi tube has a throat. The negative pressure tube is longitudinally positioned above the long lever arm section. The negative pressure tube is connected to the throat and is used to guide the negative pressure of the throat to the top of the long lever arm segment; The connecting plate is arranged horizontally above the box body, and the connecting plate is fixedly connected to the box body by a support rod; The air collecting hood is flared in shape, wider at the top and narrower at the bottom. The air collecting hood is fixedly connected to the connecting plate, and the air collecting hood is connected to one end of the venturi tube through a connecting pipe. The airflow guiding component is used to guide the external airflow into the air collection hood.

5. A high-reliability integrated primary and secondary ring network box according to claim 4, characterized in that: The flow guiding assembly includes a top plate and a flow guiding block. The top plate is disposed above the air collecting hood and is fixedly connected to the support rod. The flow guiding block is fixedly installed on the top plate and extends into the air collecting hood. Multiple sides of the flow guiding block have downwardly extending and inwardly inclined guide surfaces.

6. A high-reliability integrated primary and secondary ring network box according to claim 4, characterized in that: The lower end of the negative pressure pipe abuts against the long lever arm section when the movable plate is flipped to a predetermined angle, thereby limiting the excessive flipping of the movable plate.

7. A high-reliability integrated primary and secondary ring network box according to claim 3, characterized in that: It also includes a rainproof assembly, which includes an arc-shaped baffle and an arc-shaped cover plate. The arc-shaped baffle is fixedly installed on the top of the box and surrounds the outside of the long lever arm section. The arc-shaped cover plate covers the arc-shaped baffle plate. The arc-shaped cover plate is fixedly connected to the counterweight block through the rainproof baffle.

8. A high-reliability integrated primary and secondary ring network box according to claim 7, characterized in that: The outer side of the arc-shaped baffle and the inner wall of the arc-shaped cover plate form a side pressure cavity.

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