Environment-friendly primary and secondary fusion ring network box

Abstract

The application relates to the field of ring network boxes, and particularly discloses an environment-friendly primary-secondary fusion ring network box, which comprises a cabinet body, a sealing door is arranged on the front side of the cabinet body, an installation cavity and two buffer cavities are arranged in the cabinet body, the two buffer cavities are arranged above and below the installation cavity respectively, a ring network cabinet assembly is arranged in the installation cavity, and the two buffer cavities are communicated with the installation cavity through a plurality of shunt holes; and a heat dissipation mechanism, which comprises four rectangular telescopic pipes arranged on the two sides of the cabinet body respectively, the two rectangular telescopic pipes arranged above are communicated with the buffer cavities arranged above, and the two rectangular telescopic pipes arranged below are arranged on the two sides of the two buffer cavities arranged below. During outdoor use, the ring network box is designed to adopt air intake from below and air exhaust from above in a normal state, conforms to the chimney effect, and guarantees the heat dissipation effect; when the temperature near the ground is relatively high, the heat dissipation mode can be switched, and the mode of air intake from the top and air exhaust from the bottom is automatically adjusted.

Description

Technical Field

[0001] This invention relates to the field of ring main units, and more particularly to an environmentally friendly primary and secondary integrated ring main unit. Background Technology

[0002] In the power distribution system of smart grids, the integrated primary and secondary ring main unit (RMU) is a key piece of equipment widely used in outdoor scenarios, undertaking important tasks of power distribution and control. Its stable and reliable operation is crucial for ensuring grid security and stable power supply.

[0003] However, existing outdoor integrated primary and secondary ring main units mostly employ a single heat dissipation method in their heat dissipation design, typically a fixed bottom-intake and top-exhaust design. Under normal conditions, this design, utilizing the chimney effect in conjunction with active fan cooling, can ensure good heat dissipation performance.

[0004] However, in actual outdoor applications, such as during the hot summer months when the sun is directly overhead, the ground temperature is much higher than the air temperature at higher locations due to heat absorption from the sun. This is especially true in scenarios where the ground is installed on asphalt or concrete roads, where the temperature difference can reach 10-20°C. In such cases, the bottom-in, top-out cooling method draws in a large amount of hot air, resulting in poor actual cooling performance. To ensure proper cooling, a more powerful fan is required, which leads to significant energy consumption during continuous use. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an environmentally friendly primary and secondary integrated ring network box. Under normal outdoor conditions, this ring network box adopts a bottom air intake and top exhaust design to follow the chimney effect and ensure heat dissipation. When the temperature near the ground is high, the heat dissipation mode can be switched to automatically adjust to a top air intake and bottom exhaust method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An environmentally friendly primary and secondary integrated ring main unit includes a cabinet with a sealed door on the front. The cabinet interior has an installation cavity and two buffer cavities, located above and below the installation cavity respectively. A ring main unit assembly is installed inside the installation cavity. Both buffer cavities are connected to the installation cavity through multiple diversion holes. A heat dissipation mechanism includes four rectangular telescopic pipes on both sides of the cabinet. The two upper rectangular telescopic pipes are connected to the upper buffer cavity, and the two lower rectangular telescopic pipes are connected to the two lower buffer cavities. Rectangular ventilation frames are provided on both sides of the cabinet. Each rectangular ventilation frame contains multiple negative pressure fans. The height of both rectangular ventilation frames is adjustable via a height adjustment mechanism. When the temperature difference between the ground near the surface and the ambient air temperature is less than 10°C, the two rectangular ventilation frames are positioned at the top, and the multiple negative pressure fans provide active airflow cooling from bottom to top. When the temperature difference between the ground near the surface and the ambient air temperature is greater than 10°C, the two rectangular ventilation frames move to the bottom, and the multiple negative pressure fans provide active airflow cooling from top to bottom.

[0007] Preferably, the height adjustment mechanism includes a hollow adjustment seat fixedly connected to the rear side of the cabinet. The inner walls on both sides of the adjustment seat are provided with strip grooves. A threaded rod is rotatably connected between the upper and lower inner walls of the adjustment seat. A slider is threadedly connected to the threaded rod. The slider is slidably connected to the inner wall of the hollow adjustment seat. Both sides of the slider extend to the outside and are fixedly connected to connecting brackets. The other end of the two connecting brackets is fixedly connected to a rectangular ventilation frame.

[0008] Preferably, a drive motor is installed at the upper end of the adjusting seat, and the output shaft of the drive motor extends into the interior of the adjusting seat and is fixedly connected to the upper end of the threaded rod.

[0009] Preferably, it also includes two filtration and ventilation mechanisms, which are respectively matched with two rectangular ventilation frames. Each filtration and ventilation mechanism includes a support plate disposed on one side of the cabinet. The support plate is fixedly connected to the cabinet through four connecting plates, and a reinforcing beam is fixedly connected between each pair of corresponding connecting plates. A first movable plate and a second movable plate are provided between the support plate and the cabinet. The first movable plate and the support plate are elastically connected by multiple first springs. Multiple first guide rods are fixedly connected to the side of the support plate near the first movable plate. The other ends of the multiple first guide rods all pass through the corresponding first movable plate and are slidably connected. The cabinet and the second movable plate are elastically connected by multiple second springs. Multiple second guide rods are fixedly connected to the side of the cabinet near the second movable plate. The other ends of the multiple second guide rods all pass through the second movable plate and are slidably connected. The other end of each rectangular telescopic tube is connected to the corresponding second movable plate. The moving plate is fixedly connected, and a ventilation opening is provided at the connection between the second moving plate and the rectangular telescopic tube. A rectangular air duct is installed through the side of the first moving plate away from the second moving plate. The other end of the rectangular air duct passes through the corresponding support plate and is slidably connected. A filter screen is installed at the end of each rectangular air duct. Two air guide frames are provided between the first moving plate and the second moving plate. The opposite sides of the two air guide frames are fixedly connected to the corresponding reinforcing beams by multiple third springs. Multiple third guide rods are fixedly connected to the opposite sides of the two air guide frames. The other ends of the multiple third guide rods pass through the corresponding reinforcing beams and are slidably connected.

[0010] Preferably, the rectangular ventilation frame is located between the first movable plate and the second movable plate, and sealing gaskets are fixedly connected to both sides of the rectangular ventilation frame.

[0011] Preferably, it also includes two abutting mechanisms. The two abutting mechanisms cooperate with the two ventilation and filtration mechanisms to prevent the sealing gasket from wearing when the corresponding rectangular ventilation frame moves up and down. The abutting mechanism includes two second trapezoidal guide bars that are symmetrically fixedly connected to the side of the first moving plate near the second moving plate. The second moving plate is fixedly connected to the side of the first moving plate near the first moving plate. The upper and lower end faces of the first trapezoidal guide bar and the second trapezoidal guide bar are both inclined. The rectangular ventilation frame is fixedly connected to the front and rear sides with connecting plates. The side of each connecting plate away from the first moving plate is fixedly connected to a first abutting post. Each first abutting post cooperates with a corresponding first trapezoidal guide strip. The rectangular ventilation frame is provided with a second abutting post that can move back and forth on both the front and rear sides. Each second abutting post cooperates with a corresponding second trapezoidal guide strip.

[0012] Preferably, each of the vertical portions of the second trapezoidal guide strips is fixedly connected to two sets of abutting members on the side near the cabinet. One set of abutting members consists of multiple first trapezoidal blocks arranged at equal intervals, and the other set of abutting members consists of multiple second trapezoidal blocks arranged at equal intervals. Each first trapezoidal block is a right trapezoid with its inclined surface facing upwards, and each second trapezoidal block is a right trapezoid with its inclined surface facing downwards.

[0013] Preferably, the rectangular ventilation frame is fixedly connected to the front and rear sides with adjusting strips. A strip groove is opened on the side of the adjusting strip near the first moving plate. A reciprocating screw is rotatably connected between the front and rear inner walls of the strip groove. A sliding block is provided through the reciprocating screw. The sliding block cooperates with the reciprocating screw and is slidably connected to the inner wall of the strip groove. The side of the sliding block near the first moving plate is fixedly connected to the second abutment column. Both reciprocating screws extend to the outside at the ends away from the rectangular ventilation frame and are equipped with friction wheels. Each friction wheel is rotatably connected to the corresponding reciprocating screw through a one-way bearing. Each reinforcing beam has two friction strips fixedly connected to the side near the friction wheel, and each friction strip cooperates with the corresponding friction wheel.

[0014] Preferably, a guide seat is fixedly connected to the front side of the rectangular ventilation frame, and a guide column is fixedly connected between the two reinforcing beams. The guide column passes through the guide seat and is slidably connected.

[0015] Preferably, two first temperature sensors are installed on the bottom portions of the opposite sides of the two support plates, and two second temperature sensors are installed on the bottom portions of the opposite sides of the two support plates. The multiple first temperature sensors and second temperature sensors are used together to control the drive motor.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. This patent uses two temperature sensors at different heights to collect temperature difference data, enabling the controller to adjust the height of the rectangular ventilation frame based on the temperature difference, thus switching between two heat dissipation modes: bottom inlet and top outlet, and top inlet and bottom outlet. This aligns with the natural characteristics of hot air, effectively dissipating heat under varying temperature conditions, improving heat dissipation efficiency, reducing fan energy consumption, and preventing heat dissipation failure or poor energy efficiency.

[0017] 2. When the rectangular ventilation frame is raised and lowered, the abutting mechanism works simultaneously to prevent the sealing gasket from sliding and wearing against the moving plate, while also achieving vibration cleaning of the filter screen. Through the cooperation of the abutting column, trapezoidal guide strip, and trapezoidal block, the moving plate repeatedly abuts and moves back to generate vibration, allowing the filtered dust and impurities to fall off, ensuring the filtration effect of the filter screen and maintaining good ventilation and heat dissipation performance.

[0018] 3. When the rectangular ventilation frames are alternating, one of the filters can be backflushed. The shaking during the switching process reduces the adhesion of impurities, making the subsequent backflushing cleaning more effective, further ensuring the cleanliness of the filter, reducing the frequency of manual cleaning, and improving the stability and reliability of equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an environmentally friendly primary and secondary integrated ring network box proposed in this invention; Figure 2 for Figure 1A schematic diagram of the front side after the door has been removed; Figure 3 for Figure 1 A schematic diagram of the rear structure; Figure 4 for Figure 3 Cross-sectional view; Figure 5 This diagram shows the interaction between the heat dissipation mechanism and one of the filter and ventilation mechanisms. Figure 6 for Figure 5 A diagram from the right side; Figure 7 for Figure 6 Enlarged view of point A; Figure 8 for Figure 6 Partial cross-sectional view; Figure 9 for Figure 8 Front plan view; Figure 10 This is an enlarged view of one of the rectangular ventilation frames; Figure 11 for Figure 10 A three-dimensional diagram from the left side; Figure 12 for Figure 10 A schematic diagram of the left side of the plane.

[0020] In the diagram: 1 Cabinet, 2 Sealed Door, 3 Connecting Plate, 4 Support Plate, 5 Mounting Cavity, 6 Buffer Cavity, 7 Ring Main Unit Assembly, 8 Slider, 9 Connecting Frame, 10 Threaded Rod, 11 Strip Groove, 12 Reinforcing Beam, 13 First Temperature Sensor, 14 Second Temperature Sensor, 15 Second Moving Plate, 16 First Moving Plate, 17 Friction Strip, 18 Rectangular Air Duct, 19 Filter Screen, 20 First Spring, 21 First Guide Rod, 22 Second Spring, 23 Second Guide Rod, 24 Rectangular Telescopic 25 Pipe, 26 Connecting plate, 27 First abutting column, 28 Adjusting bar, 29 Friction wheel, 30 Guide seat, 31 Guide column, 32 First trapezoidal block, 33 Second trapezoidal block, 34 Rectangular ventilation frame, 35 Air guide frame, 36 Third spring, 37 Third guide rod, 38 First trapezoidal guide bar, 39 Sealing gasket, 40 Strip groove, 41 Reciprocating screw, 42 Sliding block, 43 Negative pressure fan, 44 Adjusting seat, 45 Drive motor, 46 Second trapezoidal guide bar. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] This invention is a primary and secondary integrated ring main unit, an intelligent outdoor complete set of equipment for distribution networks in smart grids. The core is the deep integration of primary high-voltage switchgear (ring main unit) and secondary intelligent equipment (DTU, instrument transformer, protection / metering module), realizing "plug and play, integrated operation and maintenance", significantly improving power supply reliability and automation level. Under normal conditions, it adopts a bottom air intake and top exhaust design, which follows the chimney effect to ensure heat dissipation. When the temperature near the ground is high, it can switch the heat dissipation mode and automatically adjust to top air intake and bottom exhaust, reducing energy consumption while achieving the same heat dissipation effect, thus playing a role in energy saving and environmental protection.

[0023] Reference Figures 1-12 An environmentally friendly primary and secondary integrated ring main unit includes a cabinet 1 with a sealing door 2 installed on the front side. The cabinet 1 has an installation cavity 5 and two buffer cavities 6 inside, located above and below the installation cavity 5 respectively. The ring main unit assembly 7 is installed inside the installation cavity 5, which is a deep integration of primary high-voltage switchgear and secondary intelligent equipment (DTU, instrument transformer, protection / metering module) to achieve the purpose of primary and secondary integration. This is existing technology. A controller (not shown) is also installed. Both buffer cavities 6 are connected to the installation cavity 5 through multiple diversion holes. With the cooperation of the buffer cavities 6 and the diversion holes, the airflow enters the buffer cavity and is buffered. Then, it is evenly distributed into the installation cavity 5 through the diversion holes, which can achieve uniform heat dissipation. After the airflow enters the buffer cavity 6, the expansion structure inside the cavity can fully depressurize and stabilize the high-speed airflow, eliminate airflow eddies, and then evenly send it into the installation cavity 5 through the diversion holes, fully covering the heat-generating parts of the ring main unit assembly 7, avoiding local heat dissipation dead zones, and improving heat dissipation efficiency. The system also includes a heat dissipation mechanism, which consists of four rectangular telescopic tubes 24 respectively located on both sides of the cabinet 1. The rectangular telescopic tubes 24 are made of flame-retardant PVC composite fiberglass material and have waterproof, dustproof and aging-resistant properties. The two upper rectangular telescopic tubes 24 are connected to the upper buffer chamber 6, and the two lower rectangular telescopic tubes 24 are connected to the two lower buffer chambers 6. Rectangular ventilation frames 34 are provided on both sides of the cabinet 1. Multiple negative pressure fans 43 are installed inside each rectangular ventilation frame 34. The negative pressure fans 43 in each rectangular ventilation frame 34 are high-power adjustable fans. Multiple fans are controlled in parallel and their speed can be adjusted in real time according to the temperature inside the installation cavity 5. While ensuring the heat dissipation effect, energy consumption and noise pollution are reduced, which meets the requirements of environmental protection and energy saving. The specific control scheme is the existing technology, that is, a temperature sensing structure is also set inside the installation cavity 5 and electrically connected to the negative pressure fans 43 through an internal controller. Both rectangular ventilation frames 34 are height-adjustable via a height adjustment mechanism. This mechanism includes a hollow adjustment seat 44 fixedly connected to the rear side of the cabinet 1. Each inner wall of the adjustment seat 44 has a slot 11 on both sides. A threaded rod 10 is rotatably connected between the upper and lower inner walls of the adjustment seat 44. A slider 8 is threaded onto the threaded rod 10 and slidably connected to the inner wall of the hollow adjustment seat 44. Both sides of the slider 8 extend to the outside and are fixedly connected to connecting brackets 9. The other ends of the two connecting brackets 9 are fixedly connected to the rectangular ventilation frame 34. A drive motor 45 is installed at the upper end. The output shaft of the drive motor 45 extends into the interior of the adjustment seat 44 and is fixedly connected to the upper end of the threaded rod 10. The drive motor 45 is a forward and reverse servo motor with a brake function, which can precisely control the number of rotations of the threaded rod 10. In turn, the lifting height and stopping position of the rectangular ventilation frame 34 are precisely controlled through the slider 8 and the connecting frame 9. The lifting process is smooth and without jamming. The inner wall of the strip groove 11 is provided with a wear-resistant lubricating liner, which can reduce the frictional resistance when the slider 8 slides, reduce the wear of the mechanism, and extend the service life of the adjustment mechanism. When the temperature difference between the ground near the ground and the ambient air temperature is less than 10℃, with the two rectangular ventilation frames 34 positioned above and multiple negative pressure fans 43 operating, active airflow cooling can be achieved through bottom-in, top-out operation. At this time, cold outside air enters the lower buffer chamber 6 through the lower rectangular expansion pipe 24, then evenly enters the installation chamber 5 through the diversion holes. After heat exchange with the ring main unit assembly 7, the hot air rises into the upper buffer chamber 6 and is finally discharged through the upper rectangular expansion pipe 24 and rectangular ventilation frames 34, forming a downward-in, upward-out forward convection cooling system. This aligns with the natural upward movement of hot air, further improving cooling efficiency and reducing fan energy consumption. When the temperature difference is greater than 10℃, the two rectangular ventilation frames 34 move downwards, and multiple negative pressure fans 43 work to carry out active airflow cooling from top to bottom. At this time, the air temperature near the ground is higher than the ambient air temperature. The negative pressure fans 43 draw in the cooler upper layer air from the environment, which enters the upper buffer chamber 6 through the upper rectangular telescopic pipe 24 and is evenly sent into the installation chamber 5 through the diversion hole to complete heat exchange. The air after heat exchange is discharged through the lower buffer chamber 6, the rectangular telescopic pipe 24, and the rectangular ventilation frame 34, forming a reverse convection cooling from top to bottom. This avoids the intake of high-temperature air from the ground, which could lead to heat dissipation failure and ensures the heat dissipation stability of the equipment under extreme high-temperature conditions.

[0024] The system includes two filtration and ventilation mechanisms, each cooperating with a rectangular ventilation frame 34. Each filtration and ventilation mechanism includes a support plate 4 on one side of the cabinet 1, which is fixedly connected to the cabinet 1 via four connecting plates 3. The connecting plates 3 are welded to both the cabinet 1 and the support plate 4, forming a stable load-bearing frame. A reinforcing beam 12 is fixedly connected between each pair of corresponding connecting plates 3, and the reinforcing beam 12 is bolted to the connecting plate 3. This effectively resists the impact of outdoor wind and vibration on the ventilation mechanism, ensuring the structural stability of the equipment under complex outdoor conditions. A guide seat 30 is fixedly connected to the front of the rectangular ventilation frame 34, and a guide column 31 is fixedly connected between the two reinforcing beams 12. The guide column 31 passes through the guide seat 30 and is slidably connected. The surface of the guide column 31 is chrome-plated and hardened. The guide seat 30 has a self-lubricating linear bearing embedded within it, which slides with the guide column 31. This provides precise guidance during the lifting and lowering of the rectangular ventilation frame 34, preventing lateral shifting and swaying, ensuring the accuracy of its fit with the two side moving plates, and improving the sealing effect. Furthermore, a first movable plate 16 and a second movable plate 15 are provided between the support plate 4 and the cabinet 1. The first movable plate 16 and the support plate 4 are elastically connected by multiple first springs 20. Multiple first guide rods 21 are fixedly connected to the side of the support plate 4 near the first movable plate 16. The other ends of the multiple first guide rods 21 all pass through the corresponding first movable plate 16 and are slidably connected. The cabinet 1 and the second movable plate 15 are elastically connected by multiple second springs 22. Multiple second guide rods 23 are fixedly connected to the side of the cabinet 1 near the second movable plate 15. The other ends of the multiple second guide rods 23 all pass through the second movable plate 15 and are slidably connected. The other end of each rectangular telescopic tube 24 is fixedly connected to the corresponding second movable plate 15. A ventilation opening is provided at the connection between the second movable plate 15 and the rectangular telescopic tube 24. A rectangular air duct 18 is provided through the side of the first movable plate 16 away from the second movable plate 15. One end of each rectangular air duct 18 passes through the corresponding support plate 4 and is slidably connected. Each end of the rectangular air duct 18 is equipped with a filter screen 19, which can effectively filter dust and willow catkins in the outside air. Two air guide frames 35 are set between the first moving plate 16 and the second moving plate 15. The opposite sides of the two air guide frames 35 are fixedly connected to the corresponding reinforcing beam 12 by multiple third springs 36. Multiple third guide rods 37 are fixedly connected to the opposite sides of the two air guide frames 35. The other end of the multiple third guide rods 37 passes through the corresponding reinforcing beam 12 and is slidably connected. Each air guide frame 35 has an elastic sealing layer installed on both sides. The elastic sealing layer of the air guide frame 35 is made of silicone rubber. When the rectangular ventilation frame 34 moves to the lower position, the upper air guide frame 35 works with the elastic sealing layer to seal the upper air flow channel. Similarly, when the rectangular ventilation frame 34 moves to the upper position, the lower air guide frame 35 works with the elastic sealing layer to seal the upper air flow channel.

[0025] The rectangular ventilation frame 34 is located between the first movable plate 16 and the second movable plate 15. Both sides of the rectangular ventilation frame 34 are fixedly connected with sealing gaskets 39. The sealing gaskets 39 are made of foamed polyurethane material, which has excellent compression resilience and sealing performance. When the rectangular ventilation frame 34 moves to the working position, the first spring 20 pushes the first movable plate 16 and the second spring 22 pushes the second movable plate 15, so that the sealing gaskets 39 on both sides are tightly fitted with the first movable plate 16 and the second movable plate 15 respectively, realizing the full circumference sealing of the ventilation circuit, preventing dust-laden airflow from directly entering the cabinet without filtration, and reducing airflow noise at the same time.

[0026] It also includes two abutting mechanisms. During the lifting and lowering adjustment of the rectangular ventilation frame 34, the abutting mechanism can simultaneously drive the first moving plate 16 and the second moving plate 15 away from each other, so that the sealing gasket 39 is disengaged from the moving plate, which completely solves the problem of sliding wear of the sealing gasket 39 during the lifting and lowering process and extends the service life of the seal. It should be noted that the use of this abutting mechanism also prevents the rubber sealing layer of the air guide frame 35 from being worn when it moves up and down. The abutting mechanism includes two second trapezoidal guide bars 46 that are symmetrically fixedly connected to the side of the first moving plate 16 near the second moving plate 15. The side of the second moving plate 15 near the first moving plate 16 is fixedly connected to the first trapezoidal guide bar 38. The upper and lower end faces of the first trapezoidal guide bar 38 and the second trapezoidal guide bar 46 are both inclined. Furthermore, connecting plates 25 are fixedly connected to both the front and rear sides of the rectangular ventilation frame 34. First abutting posts 26 are fixedly connected to the side of each connecting plate 25 away from the first moving plate 16. Each first abutting post 26 cooperates with a corresponding first trapezoidal guide bar 38. When the rectangular ventilation frame 34 begins to move up and down, the first abutting post 26 moves synchronously with the rectangular ventilation frame 34, sliding along the inclined surface of the first trapezoidal guide bar 38. Through the pushing action of the inclined surface, it overcomes the elastic force of the second spring 22, pushing the second moving plate 15 towards... The second moving plate 15 moves away from the rectangular ventilation frame 34, causing it to separate from the sealing gasket 39 on the corresponding side, thus eliminating sliding friction during the lifting process. The front and rear sides of the rectangular ventilation frame 34 are provided with second abutment posts 28 that can move back and forth. Each second abutment post 28 cooperates with the corresponding second trapezoidal guide strip 46. Similarly, with the cooperation of the second abutment post 28 and the corresponding second trapezoidal guide strip 46, the first moving plate 16 can be separated from the sealing gasket 39 on the corresponding side when the rectangular ventilation frame 34 begins to move up and down. Furthermore, each second trapezoidal guide bar 46 has two sets of abutment members fixedly connected to its vertical section near the cabinet 1. One set of abutment members consists of multiple equally spaced first trapezoidal blocks 32, and the other set consists of multiple equally spaced second trapezoidal blocks 33. Each first trapezoidal block 32 is a right-angled trapezoid with its inclined surface facing upwards, and each second trapezoidal block 33 is a right-angled trapezoid with its inclined surface facing downwards. This method ensures that... Figure 8 Taking the front part of the viewpoint as an example, when the second abutment post 28 moves down and is on the second trapezoidal guide strip 46, as it continues to move down, it will pass through multiple front first trapezoidal blocks 32 in sequence. When it passes the inclined surface of the first trapezoidal block 32, it will abut against the entire second trapezoidal guide strip 46 and the first moving plate 16, moving them away from the rectangular ventilation frame 34 and further compressing the multiple first springs 20. When it is at the right angle of the first trapezoidal block 32, if it continues to move down, it will directly separate from the first trapezoidal block 32. At this time, under the elastic action of the multiple first springs 20, the entire second trapezoidal guide strip 46 and the first moving plate 16 will suddenly move back and collide with the second abutment post 28, generating vibration. This vibration force will act on the filter screen 19, causing the dust and impurities filtered on it to fall off, facilitating subsequent recirculation. The air is blown through multiple trapezoidal blocks 32, and the process is repeated, resulting in multiple vibrations. Similarly, during the upward movement, the second abutment column 28 will cooperate with multiple second trapezoidal blocks 33 to repeat a similar process. The upward movement will also cause the filter screen 19 to vibrate multiple times. When the rectangular ventilation frame 34 moves down to the bottom, the actual air intake part is the top part, that is, the upper filter screen 19 takes in air and the lower filter screen 19 exhausts air. When the rectangular ventilation frame 34 moves up to the top, the actual air intake part is the bottom part, that is, the upper filter screen 19 exhausts air and the lower filter screen 19 takes in air. After the two alternate, one of the filter screens 19 can be back-blown. The shaking during the switching process can reduce the adhesion of impurities and make the cleaning effect of the subsequent back-blowing operation better. In addition, adjusting strips 27 are fixedly connected to both the front and rear sides of the rectangular ventilation frame 34. A strip groove 40 is opened on the side of the adjusting strip 27 near the first moving plate 16. A reciprocating screw 41 is rotatably connected between the front and rear inner walls of the strip groove 40. A sliding block 42 is installed through the reciprocating screw 41. The sliding block 42 cooperates with the reciprocating screw 41. The surface of the rod is machined with a continuous closed-loop reciprocating spiral groove, and the reversing sections at both ends are smoothly transitioned without dead angle jamming. The sliding block 42 is a driven sliding component with a guide embedded inside. The pin is inserted into the spiral groove of the reciprocating screw 41. After the reciprocating screw 41 rotates a fixed number of times, the sliding block 42 will move forward to the foremost position. If it continues to rotate, the sliding block 42 will move backward. In this solution, the rotation point of the reciprocating screw 41 and the strip groove 40 is equipped with damping, which can ensure that it is difficult to rotate without a large rotational force. The sliding block 42 is slidably connected to the inner wall of the strip groove 40. The side of the sliding block 42 near the first moving plate 16 is fixedly connected to the second abutment post 28. Both reciprocating screws 41 extend to the outside at the ends furthest from the rectangular ventilation frame 34 and are equipped with friction wheels 29. Each friction wheel 29 is rotatably connected to the corresponding reciprocating screw 41 via a one-way bearing. Two friction strips 17 are fixedly connected to the side of each reinforcing beam 12 closest to the friction wheel 29. Each friction strip 17 engages with the corresponding friction wheel 29. The one-way bearing enables unidirectional transmission of the friction wheel 29; that is, when the rectangular ventilation frame 34 descends, the friction wheel 29 contacts and rolls with the upper friction strip 17, achieving unidirectional transmission. When the bearing does not idle, the reciprocating screw 41 rotates. When it moves downwards and contacts the lower friction strip 17, the friction wheel 29 rolls in contact with the lower friction strip 17, the one-way bearing idles, and the reciprocating screw 41 does not rotate. When the rectangular ventilation frame 34 moves upwards, the friction wheel 29 rolls in contact with the lower friction strip 17, the one-way bearing does not idle, and the reciprocating screw 41 rotates. When it moves upwards and contacts the upper friction strip 17, the friction wheel 29 rolls in contact with the upper friction strip 17, the one-way bearing idles, and the reciprocating screw 41 does not rotate. When the reciprocating screw 41 rotates, the drive sliding block 42 can reciprocate along the strip groove 40, driving the second abutment column 28 to move synchronously. Specifically, with Figure 8 From the perspective of the initial state, the second abutment column 28 is located at the rear. When it moves down, it moves down and forward simultaneously through the cooperation of the friction wheel 29 and the upper friction strip 17. When it moves down to the point where the friction wheel 29 leaves the upper friction strip 17, the second abutment column 28 will move to the frontmost side and cooperate with multiple first trapezoidal blocks 32. When it moves down to cooperate with the upper and lower friction strips 17, it will not cause the reciprocating screw 41 to rotate. When it moves up, the second abutment column 28 will move backward and upward, similar to the downward movement process, thereby realizing the adjustment of the front and rear position of the second abutment column 28, so that when it moves down, it corresponds to the first trapezoidal block 32 and when it moves up, it corresponds to the second trapezoidal block 33.

[0027] Two first temperature sensors 13 are installed on the bottom of the opposite sides of the two support plates 4, and two second temperature sensors 14 are installed on the bottom of the opposite sides of the two support plates 4. The multiple first temperature sensors 13 and second temperature sensors 14 are used to control the drive motor 45. The installation height of the first temperature sensor 13 is no more than 10cm from the ground, and it is used to accurately collect the air temperature near the ground. The installation height of the second temperature sensor 14 is no less than 1.5m from the ground, and it is used to collect the air temperature at the standard ambient height. Both sets of sensors use high-precision PT100 platinum resistance temperature sensors, with a temperature measurement accuracy of ±0.2℃. They can collect temperature difference data in real time and transmit it to the controller of the ring main unit. The controller automatically controls the forward and reverse rotation and start and stop of the drive motor 45 according to the preset temperature difference threshold, realizing fully automatic switching of heat dissipation mode without manual intervention, improving the intelligence level and operation and maintenance convenience of the equipment.

[0028] It should be noted that this solution is mainly designed for environments with a large temperature difference between the ground and the upper air. The negative pressure fan 43 is a high-power fan. With its high static pressure and strong thrust, it can completely overcome the thermal pressure resistance generated by the natural upward movement of hot air, completely ignore the natural convection effect of the upward movement of hot air, and completely cover the entire path circulation of the reverse airflow. There is no airflow short circuit or circulation stagnation. In addition, the height adjustment mechanism mentioned above can also be actively triggered by the controller when it is not in use for a long time, so as to clean the filter 19 regularly.

[0029] In this invention, the first temperature sensor 13 and the second temperature sensor 14 collect temperature data in real time. The first temperature sensor 13 collects the air temperature near the ground at a distance of no more than 10cm from the ground, and the second temperature sensor 14 collects the air temperature at an ambient standard height of no less than 1.5m from the ground. The two sets of sensors transmit the collected temperature difference data to the controller. The controller controls the forward and reverse rotation and start and stop of the drive motor 45 according to the preset temperature difference threshold, and then adjusts the height of the rectangular ventilation frame 34 through the height adjustment mechanism to realize the switching between two heat dissipation modes. When the temperature difference between the ground near the ground and the ambient air temperature is less than 10℃, the rectangular ventilation frame 34 is located at the upper working position. At this time, multiple negative pressure fans 43 are activated to carry out active airflow cooling from bottom to top. The cold outside air enters the lower buffer chamber 6 through the lower rectangular telescopic pipe 24, and is evenly distributed into the installation chamber 5 through the diversion hole. After completing heat exchange with the ring main unit assembly 7, the hot air rises into the upper buffer chamber 6, and is finally discharged through the upper rectangular telescopic pipe 24 and the rectangular ventilation frame 34, forming forward convection cooling, which conforms to the natural rising characteristics of hot air, improves heat dissipation efficiency and reduces fan energy consumption.

[0030] When the temperature difference between the ground surface and the ambient air temperature exceeds 10℃, the height adjustment mechanism activates. The drive motor 45 starts, and its output shaft rotates the threaded rod 10, causing the slider 8 to move downwards. The slider 8 extends to the outside and, through the connecting frame 9, lowers the rectangular ventilation frame 34 to the lower working position. At this point, multiple negative pressure fans 43 are activated to provide active airflow cooling from top to bottom. The negative pressure fans 43 draw in cooler upper-level air from the environment, which enters the upper buffer chamber 6 through the upper rectangular telescopic pipe 24 and is evenly distributed into the installation chamber 5 through the diversion holes to complete heat exchange. The air after heat exchange is discharged through the lower buffer chamber 6, the rectangular telescopic pipe 24, and the rectangular ventilation frame 34, forming reverse convection cooling. The negative pressure fan 43 uses a high-power fan, and in this state, the temperature inside the cabinet 1 is generally high. The negative pressure fan 43 operates at a high power, which can completely ignore the natural upward movement of hot air, avoiding the situation where hot air from the ground is sucked in, causing heat dissipation failure or poor heat dissipation energy consumption. After the temperature difference decreases, it will perform the reverse operation, that is, the drive motor 45 will rotate in the reverse direction to adjust and achieve reset. During the entire heat dissipation process, the outside air is filtered by the filter screen 19 at the end of the rectangular air duct 18 to remove dust, catkins and other impurities, and then enters the rectangular telescopic tube 24 through the vent on the first moving plate 16, and then enters the buffer chamber 6 to participate in the heat dissipation cycle, preventing impurities from entering the inside of the cabinet 1.

[0031] After the rectangular ventilation frame 34 moves to the working position, the first spring 20 pushes the first moving plate 16 and the second spring 22 pushes the second moving plate 15, so that the sealing gaskets 39 on both sides of the rectangular ventilation frame 34 are tightly fitted with the first moving plate 16 and the second moving plate 15 respectively, realizing a full circumferential seal of the ventilation circuit and preventing dust-laden airflow from directly entering the cabinet 1 without filtration; at the same time, the air guide frame 35 at the corresponding position, together with the elastic sealing layer on both sides, realizes the sealing of the corresponding air flow channel.

[0032] During the lifting and lowering adjustment of the rectangular ventilation frame 34, the abutment mechanism also works synchronously to prevent the sealing gasket 39 from sliding and wearing with the moving plate, while simultaneously achieving vibration cleaning of the filter screen 19. When the rectangular ventilation frame 34 is lifted and lowered, the connecting plates 25 on its front and rear sides drive the first abutment column 26 to move synchronously. The first abutment column 26 slides along the inclined surface of the first trapezoidal guide bar 38, overcoming the elastic force of the second spring 22 to push the second moving plate 15 away from the rectangular ventilation frame 34, thus separating the second moving plate 15 from the sealing gasket 39. At the same time, the friction wheels 29 on the front and rear sides of the rectangular ventilation frame 34 contact and roll with the corresponding friction bars 17, driving the reciprocating screw 41 to rotate through the one-way bearing. The reciprocating screw 41 cooperates with the sliding block 42, driving the second abutment column 28 to move along the strip groove 40. The second abutment column 28 cooperates with the second trapezoidal guide bar 46, overcoming the elastic force of the first spring 20 to push the first moving plate 16 away from the rectangular ventilation frame 34, thus separating the first moving plate 16 from the sealing gasket 39.

[0033] During the movement of the second abutment column 28, it cooperates with both the first trapezoidal block 32 and the second trapezoidal block 33 on the second trapezoidal guide strip 46. When the rectangular ventilation frame 34 moves downward, the second abutment column 28 cooperates with the first trapezoidal block 32, repeatedly abutting the first moving plate 16 away and moving back under the action of the first spring 20, generating vibration and transmitting it to the filter screen 19, causing the filtered dust and impurities to loosen or even fall off. When the rectangular ventilation frame 34 moves upward, the second abutment column 28 cooperates with the second trapezoidal block 33, repeating the above vibration process. Furthermore, when the rectangular ventilation frame 34 moves down to the bottom, the actual air intake is the top part, that is, the upper filter 19 takes in air and the lower filter 19 takes out air. When the rectangular ventilation frame 34 moves up to the top, the actual air intake is the bottom part, that is, the upper filter 19 takes out air and the lower filter 19 takes in air. After the two alternate, one of the filters 19 can be backflushed. The shaking during the switching process can reduce the adhesion of impurities and make the cleaning effect of the subsequent backflushing operation better.

[0034] The negative pressure fan 43 adopts a high-power adjustable fan with multiple sets of parallel control. The controller adjusts the speed of the negative pressure fan 43 in real time based on the temperature data collected by the temperature sensing structure in the installation cavity 5. While ensuring heat dissipation, it reduces energy consumption and noise pollution, meeting environmental protection and energy-saving requirements. At the same time, the height adjustment mechanism can be actively triggered by the controller to start periodically when the equipment is not in motion for a long time, cleaning the filter screen 19 and ensuring long-term stable operation of the equipment.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An environmentally friendly primary and secondary integrated ring main unit, characterized in that, include: Cabinet (1), a sealing door (2) is installed on the front side of the cabinet (1), and an installation cavity (5) and two buffer cavities (6) are provided inside the cabinet (1). The two buffer cavities (6) are located above and below the installation cavity (5) respectively. A ring network cabinet assembly (7) is installed inside the installation cavity (5). The two buffer cavities (6) are connected to the installation cavity (5) through multiple diversion holes. The heat dissipation mechanism includes four rectangular telescopic tubes (24) respectively set on both sides of the cabinet (1). The two rectangular telescopic tubes (24) located at the top are connected to the upper buffer chamber (6), and the two rectangular telescopic tubes (24) located at the bottom are connected to the two lower buffer chambers (6). Rectangular ventilation frames (34) are set on both sides of the cabinet (1). Multiple negative pressure fans (43) are installed inside each rectangular ventilation frame (34). The height of the two rectangular ventilation frames (34) is adjusted by a height adjustment mechanism. When the temperature difference between the ground near the ground and the ambient air temperature is less than 10°C, the two rectangular ventilation frames (34) are located at the top. When the multiple negative pressure fans (43) are working, active airflow heat dissipation can be carried out from bottom to top. When the temperature difference between the ground near the ground and the ambient air temperature is greater than 10°C, the two rectangular ventilation frames (34) are moved to the bottom. When the multiple negative pressure fans (43) are working, active airflow heat dissipation can be carried out from top to bottom.

2. The environmentally friendly primary and secondary integrated ring network box according to claim 1, characterized in that, The height adjustment mechanism includes a hollow adjustment seat (44) fixedly connected to the rear side of the cabinet (1). The inner walls on both sides of the adjustment seat (44) are provided with strip grooves (11). A threaded rod (10) is rotatably connected between the upper and lower inner walls of the adjustment seat (44). A slider (8) is threadedly connected to the threaded rod (10). The slider (8) is slidably connected to the inner wall of the hollow adjustment seat (44). Both sides of the slider (8) extend to the outside and are fixedly connected to connecting brackets (9). The other end of the two connecting brackets (9) is fixedly connected to a rectangular ventilation frame (34).

3. The environmentally friendly primary and secondary integrated ring network box according to claim 2, characterized in that, The upper end of the adjusting seat (44) is equipped with a drive motor (45), the output shaft of the drive motor (45) extends into the adjusting seat (44) and is fixedly connected to the upper end of the threaded rod (10).

4. The environmentally friendly primary and secondary integrated ring network box according to claim 3, characterized in that, It also includes two filtration and ventilation mechanisms, which are respectively matched with two rectangular ventilation frames (34). The filtration and ventilation mechanism includes a support plate (4) set on one side of the cabinet (1). The support plate (4) is fixedly connected to the cabinet (1) through four connecting plates (3). A reinforcing beam (12) is fixedly connected between each pair of corresponding connecting plates (3). A first movable plate (16) and a second movable plate (15) are provided between the support plate (4) and the cabinet (1). The first movable plate (16) and the support plate (4) are elastically connected by multiple first springs (20). Multiple first guide rods (21) are fixedly connected to the side of the support plate (4) near the first movable plate (16). The other ends of the multiple first guide rods (21) all pass through the corresponding first movable plate (16) and are slidably connected. The cabinet (1) and the second movable plate (15) are elastically connected by multiple second springs (22). Multiple second guide rods (23) are fixedly connected to the side of the cabinet (1) near the second movable plate (15). The other ends of the multiple second guide rods (23) all pass through the second movable plate (15) and are slidably connected. The other end of each rectangular telescopic tube (24) is connected to the corresponding second movable plate. The plate (15) is fixedly connected. A ventilation opening is provided at the connection between the second movable plate (15) and the rectangular telescopic tube (24). A rectangular air duct (18) is provided through the side of the first movable plate (16) away from the second movable plate (15). The other end of the rectangular air duct (18) passes through the corresponding support plate (4) and is slidably connected. A filter screen (19) is installed at the end of each rectangular air duct (18). Two air guide frames (35) are provided between the first movable plate (16) and the second movable plate (15). The opposite sides of the two air guide frames (35) are fixedly connected to the corresponding reinforcing beam (12) by multiple third springs (36). Multiple third guide rods (37) are fixedly connected to the opposite sides of the two air guide frames (35). The other end of the multiple third guide rods (37) passes through the corresponding reinforcing beam (12) and is slidably connected.

5. The environmentally friendly primary and secondary integrated ring network box according to claim 4, characterized in that, The rectangular ventilation frame (34) is located between the first movable plate (16) and the second movable plate (15), and sealing gaskets (39) are fixedly connected to both sides of the rectangular ventilation frame (34).

6. The environmentally friendly primary and secondary integrated ring network box according to claim 4, characterized in that, It also includes two abutting mechanisms. The two abutting mechanisms cooperate with the two ventilation and filtration mechanisms to prevent the sealing gasket (39) from being worn when the corresponding rectangular ventilation frame (34) moves up and down. The abutting mechanism includes two second trapezoidal guide bars (46) that are symmetrically fixedly connected to the side of the first moving plate (16) near the second moving plate (15). The side of the second moving plate (15) near the first moving plate (16) is fixedly connected to the first trapezoidal guide bar (38). The upper and lower end faces of the first trapezoidal guide bar (38) and the second trapezoidal guide bar (46) are both inclined. The rectangular ventilation frame (34) is fixedly connected to the front and rear sides with connecting plates (25). The two connecting plates (25) are fixedly connected to the side away from the first moving plate (16) with first abutting posts (26). Each first abutting post (26) cooperates with the corresponding first trapezoidal guide strip (38). The rectangular ventilation frame (34) is provided with second abutting posts (28) that can move back and forth on the front and rear sides. Each second abutting post (28) cooperates with the corresponding second trapezoidal guide strip (46).

7. The environmentally friendly primary and secondary integrated ring main unit according to claim 6, characterized in that, Each of the second trapezoidal guide bars (46) has two sets of abutting members fixedly connected to the side of the cabinet (1) on the vertical part. One set of abutting members consists of multiple first trapezoidal blocks (32) arranged at equal intervals, and the other set of abutting members consists of multiple second trapezoidal blocks (33) arranged at equal intervals. Each first trapezoidal block (32) is a right trapezoid with its inclined surface facing upwards, and each second trapezoidal block (33) is a right trapezoid with its inclined surface facing downwards.

8. The environmentally friendly primary and secondary integrated ring main unit according to claim 7, characterized in that, The rectangular ventilation frame (34) is fixedly connected to the front and rear sides with adjusting strips (27). The adjusting strips (27) have a strip groove (40) on the side near the first moving plate (16). A reciprocating screw (41) is rotatably connected between the front and rear inner walls of the strip groove (40). A sliding block (42) is provided through the reciprocating screw (41). The sliding block (42) cooperates with the reciprocating screw (41). The sliding block (42) is slidably connected to the inner wall of the strip groove (40). The side of the sliding block (42) near the first moving plate (16) is fixedly connected to the second abutment column (28). Both reciprocating screws (41) extend to the outside from the rectangular ventilation frame (34) and are equipped with friction wheels (29). Each friction wheel (29) is rotatably connected to the corresponding reciprocating screw (41) through a one-way bearing. Each reinforcing beam (12) has two friction strips (17) fixedly connected to the side of the friction wheel (29). Each friction strip (17) is engaged with the corresponding friction wheel (29).

9. The environmentally friendly primary and secondary integrated ring main unit according to claim 8, characterized in that, The front side of the rectangular ventilation frame (34) is fixedly connected to a guide seat (30), and a guide column (31) is fixedly connected between the two reinforcing beams (12). The guide column (31) passes through the guide seat (30) and is slidably connected.

10. The environmentally friendly primary and secondary integrated ring network box according to claim 4, characterized in that, Two first temperature sensors (13) are installed on the bottom part of the opposite side of the two support plates (4), and two second temperature sensors (14) are installed on the bottom part of the opposite side of the two support plates (4). The multiple first temperature sensors (13) and second temperature sensors (14) are used together to control the drive motor (45).

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