A high-voltage terminal ring network box of an intelligent compact substation

Abstract

This invention relates to the field of substation ring main unit technology, specifically a high-voltage terminal ring main unit for an intelligent compact substation. The invention includes a base upon which a cabinet body is mounted. Inside the cabinet body is a cross-shaped corrugated rubber connecting layer made of aging-resistant nitrile rubber. This corrugated rubber connecting layer divides the cabinet body into an upper left high-voltage switch compartment, an upper right busbar compartment, a lower left intelligent control compartment, and a lower right cable terminal compartment. The invention utilizes a dynamic safety gap adjustment mechanism formed by the cross-shaped corrugated rubber connecting layer and an extendable support frame. This mechanism adaptively drives the four functional compartments within the cabinet body to achieve bidirectional synchronous separation in both left-right and top-bottom directions according to changes in ambient humidity. It extends the cross-shaped corrugated rubber connecting layer to uniformly increase the safety gap between the compartments, thereby offsetting the decrease in air dielectric insulation strength under high humidity conditions and restoring and ensuring sufficient insulation margin inside the ring main unit.

Description

Technical Field

[0001] This invention relates to the field of substation ring main unit technology, specifically a high-voltage terminal ring main unit for an intelligent compact substation. Background Technology

[0002] In power distribution systems, high-voltage terminal ring main units (VLLs) are the core power distribution equipment in substations. Their compact layout, operational safety, and environmental adaptability directly determine the space utilization and power supply stability of the substation. With the increasing demands for space efficiency in power infrastructure construction, compact design has become the mainstream design trend for VLLs. To achieve a compact layout, traditional ring main units generally adopt the practice of significantly compressing the safety clearances between various internal functional areas, maintaining only the minimum safety clearance standard required for normal operating conditions.

[0003] The compact design of this type of traditional fixed gap can meet basic electrical safety requirements in normal dry environments, but it has significant safety shortcomings in high humidity environments: moisture in the air will greatly reduce the insulation strength of the air medium, causing the originally compliant fixed minimum safety gap to lose sufficient insulation margin, which can easily lead to creepage, flashover or even breakdown accidents between different areas, seriously threatening the safety of the power distribution system. Summary of the Invention

[0004] The purpose of this invention is to provide a high-voltage terminal ring network box for an intelligent and compact substation to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions: A high-voltage terminal ring network box for an intelligent compact substation, preferably, includes a base on which a cabinet body is mounted; The cabinet body is equipped with a cross-shaped rubber corrugated connection layer made of aging-resistant nitrile rubber. The cross-shaped rubber corrugated connection layer divides the cabinet body into the upper left high-voltage switch compartment, the upper right busbar compartment, the lower left intelligent control compartment, and the lower right cable terminal compartment. The cross-shaped rubber corrugated connection layer has bidirectional expansion and contraction characteristics. The base is also equipped with an extendable support frame, which is connected to the four compartments of the cabinet body. The extendable support frame and the cross-shaped rubber corrugated connecting layer together form a dynamic safety gap adjustment mechanism. The extendable support frame is used to drive the left and right compartments to move away from each other along the length of the base, and simultaneously drive the upper compartment to move away from the lower compartment along the height of the cabinet. The cross-shaped rubber corrugated connecting layer is pulled to extend, thereby increasing the safety gap between the four compartments.

[0006] Preferably, the cabinet body adopts a layout of upper and lower layers and left and right partitions. The intelligent control compartment on the left and the high-voltage switch compartment in the upper left area are far away from the cable terminal compartment on the right. The cable terminal compartment is located on the bottom right side of the cabinet body to shorten the external wiring distance. The compartments are isolated by a cross-shaped rubber corrugated connection layer to achieve interference prevention of components on the same layer and longitudinal stacking to reduce the floor space occupied.

[0007] Preferably, the extendable support frame includes two L-shaped brackets symmetrically slidably connected to the top of the base, and a transmission rack is provided in the middle section of each of the two L-shaped brackets; One end of the base is fixedly connected to a gantry frame, and a transmission gear is rotatably connected inside the gantry frame. Two transmission racks are arranged opposite each other and mesh synchronously with the transmission gear.

[0008] Preferably, the lower left intelligent control compartment and the lower right cable terminal compartment are respectively fixedly connected to two L-shaped brackets; The top of the L-shaped bracket is provided with a transmission groove along the height of the cabinet. The upper left high-voltage switch compartment and the upper right busbar compartment are both fixedly connected to transmission sliders that are slidably disposed inside the transmission groove.

[0009] Preferably, guide slide rods are symmetrically slidably connected to the gantry frame, and lifting rods are fixedly connected to the bottom of the two guide slide rods. An electric push rod for driving the lifting rods to rise and fall is fixedly connected to the top of the gantry frame. The bottom of the lifting rod is fixedly connected to a power rack that meshes with the transmission gear, and the outer sides of the high-voltage switch compartment in the upper left zone and the busbar compartment in the upper right zone are both fixedly connected to follower wheels that roll against the top of the lifting rod.

[0010] Preferably, it also includes an air outlet on the top of the cabinet body, an air inlet on the side, and a pair of air-gathering hoods symmetrically arranged on the top of the base. The output end of the air-gathering hood is equipped with an elastic corrugated cover. When the cabinet body moves left and right in sections, the elastic corrugated cover abuts against its side wall and covers the outside of the air inlet. The air shroud is equipped with a cooling fan inside and a filter at the input end.

[0011] Preferably, it also includes a pair of dehumidifying brackets symmetrically fixedly connected to the top of the base, the dehumidifying brackets having a restoration chamber inside, and a molecular sieve slidingly disposed inside the restoration chamber; The bottom of the wind-gathering hood is provided with a U-shaped insertion port adapted to the molecular sieve, and a heating restorer with an output end extending into the restore chamber is also provided on one side of the dehumidification bracket.

[0012] Preferably, the bottom of the molecular sieve is symmetrically and fixedly connected with lifting slide rods, and a return spring is sleeved on the outer periphery of the lifting slide rods. The bottom of two adjacent lifting slide rods is rotatably connected with a lifting slider. The reset spring is located between the dehumidification bracket and the lifting slider.

[0013] Preferably, it also includes a double-sided fixed rack symmetrically fixedly connected to the top of the base, and a driven rack slidably connected to the base; The bottom of both the lower left intelligent control compartment and the lower right cable terminal compartment are rotatably connected to a drive gear that simultaneously meshes with both the double-sided fixed rack and the driven rack. One end of the driven rack is fixedly connected to a grooved guide rod, and the lifting slider is slidably disposed inside the grooved guide rod.

[0014] Preferably, the grooved guide rod is provided with a horizontal section, a climbing section and a lifting section connected in sequence from low to high inside; When the extendable support frame drives the cabin to unfold, the driven rack moves through the cooperation of the active gear and the double-sided fixed rack, causing the lifting slider to slide in different sections to adjust the transfer of molecular sieve between the wind hood and the recovery chamber, thereby achieving air convection acceleration under high heat conditions or molecular sieve dehumidification assistance under high humidity conditions.

[0015] The beneficial effects of this invention are: 1. This invention uses a cross-shaped rubber corrugated connecting layer and an extendable support frame to form a dynamic safety gap adjustment mechanism. It can adaptively drive the four functional compartments inside the cabinet to achieve synchronous separation in both left and right and up and down directions according to changes in ambient humidity. Pulling the cross-shaped rubber corrugated connecting layer extends to uniformly expand the safety gap between the compartments, thereby offsetting the decrease in the insulation strength of the air medium under high humidity conditions, restoring and ensuring sufficient insulation margin inside the ring main unit, fundamentally avoiding creepage, flashover, and even breakdown accidents between different areas under high humidity conditions. At the same time, the compartments can be reset under non-high humidity conditions, always maintaining the compact layout of the ring main unit, taking into account both the requirements of space intensification and the safety of operation in high humidity environments.

[0016] 2. This invention uses an electric actuator as the power input. Through the meshing transmission of the power rack and transmission gear, the vertical power is converted into the horizontal counter-movement of two L-shaped supports, realizing the left and right separation of the two lower compartments. At the same time, relying on the rolling contact between the lifting rod and the follower wheel, and with the sliding guidance of the transmission slider and the transmission groove, the two upper compartments are driven to move away from the lower compartment in the vertical direction. The entire transmission process realizes the synchronous linkage of the left and right and up and down separation of the compartments. Moreover, the bidirectional expansion and contraction characteristics of the cross-shaped rubber corrugated connecting layer provide flexible support for the movement of the compartments, which not only ensures the effective isolation of each compartment during the gap adjustment process, but also avoids the component wear caused by rigid transmission, ensuring that the safety gap is expanded uniformly, and making the improvement of insulation protection more stable.

[0017] 3. During the gap expansion process, the side wall of the cabinet body abuts against the elastic corrugated cover and seals the air inlet. Combined with the increase in the cross-sectional area of ​​air circulation inside the cabinet, the air convection efficiency driven by the cooling fan is greatly improved, effectively compensating for the heat loss caused by the encroachment of external heat dissipation space after the expansion of the cabinet. At the same time, through the linkage of the drive gear, double-sided fixed rack and slotted guide rod, the high-temperature and high-humidity conditions are responded to in stages according to the expansion distance of the chamber. In high humidity, the molecular sieve is automatically pushed to absorb moisture, so that dry air fills the expanded safety gap and reduces the humidity inside the cabinet, thus doubly improving the insulation protection effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the cabinet body in this invention; Figure 3 This is a top view of the overall structure of the present invention; Figure 4 yes Figure 3 A cross-sectional view along the AA direction; Figure 5 This is a schematic diagram of the overall structure of the gantry frame in this invention; Figure 6 This is a schematic diagram of the overall structure of the L-shaped bracket in this invention; Figure 7 This is a schematic diagram of the overall structure of the base in this invention; Figure 8 This is an exploded view of the connection relationship between the air-collecting hood and the dehumidifying bracket in this invention; Figure 9 This is a schematic diagram of the internal structure of the wind-gathering shroud in this invention; Figure 10 This is a schematic diagram of the internal structure of the restoration chamber in this invention; Figure 11 This is a schematic diagram of the overall structure of the grooved guide rod in this invention.

[0019] The attached diagram is labeled as follows: 1. Base; 2. Cabinet body; 3. Cross-shaped rubber corrugated connecting layer; 4. L-shaped bracket; 5. Transmission rack; 6. Gantry frame; 7. Transmission gear; 8. Transmission slide groove; 9. Transmission slider; 10. Guide slide rod; 11. Lifting rod; 12. Electric push rod; 13. Power rack; 14. Follower wheel; 15. Air outlet; 16. Air inlet; 17. Air concentrator; 18. Elastic corrugated cover; 19. Cooling fan; 20. Filter screen; 21. Dehumidification bracket; 22. Restoration chamber; 23. Molecular sieve; 24. U-shaped insert; 25. Lifting slide rod; 26. Return spring; 27. Lifting slider; 28. Heating restorer; 29. ​​Double-sided fixed rack; 30. Driven rack; 31. Drive gear; 32. Groove guide rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] A high-voltage terminal ring main unit for an intelligent compact substation is disclosed. This unit, as the core technical solution, addresses the problems of insufficient insulation margin of fixed safety gaps in traditional compact high-voltage terminal ring main units under high humidity environments, decreased heat dissipation efficiency with gap adjustment, and mismatch between dehumidification protection and operating conditions through the coordinated operation of a dynamic safety gap adjustment mechanism, a heat dissipation linkage mechanism, and a dehumidification grading mechanism. This high-voltage terminal ring main unit belongs to the field of substation power distribution equipment technology and is specifically designed to achieve dynamic adaptation of safety gaps, synchronous linkage of heat dissipation and dehumidification with gap adjustment, and a compact layout design through purely mechanical linkage. This enables the compact ring main unit to achieve insulation protection under high humidity conditions, efficient heat dissipation under high heat conditions, and stable operation of the power distribution system.

[0022] like Figures 1-11 As shown, it includes a base 1, on which a cabinet body 2 is mounted; The cabinet body 2 is equipped with a cross-shaped rubber corrugated connection layer 3 made of aging-resistant nitrile rubber. The cross-shaped rubber corrugated connection layer 3 divides the interior of the cabinet body 2 into the upper left high-voltage switch compartment, the upper right bus compartment, the lower left intelligent control compartment, and the lower right cable terminal compartment. The cross-shaped rubber corrugated connection layer 3 has bidirectional expansion and contraction characteristics. The base 1 is also equipped with an extendable support frame, which is connected to the four compartments of the cabinet body 2 respectively. The extendable support frame and the cross-shaped rubber corrugated connecting layer 3 together form a dynamic safety gap adjustment mechanism. The extendable support frame is used to drive the left compartment and the right compartment to move away from each other along the length of the base 1, and simultaneously drive the upper compartment to move away from the lower compartment along the height of the cabinet. The cross-shaped rubber corrugated connecting layer 3 is pulled to extend the safety gap between the four compartments. The cabinet body 2 adopts a layout of upper and lower layers and left and right partitions. The intelligent control compartment on the left and the high-voltage switch compartment in the upper left area are far away from the cable terminal compartment on the right. The cable terminal compartment is located on the bottom right side of the cabinet body 2 to shorten the external wiring distance. The compartments are isolated by a cross-shaped rubber corrugated connection layer 3 to achieve interference prevention of components on the same layer and longitudinal stacking to reduce the footprint. Furthermore, the extendable support frame includes two L-shaped brackets 4 symmetrically slidably connected to the top of the base 1, and a transmission rack 5 is provided in the middle section of each of the two L-shaped brackets 4. One end of the base 1 is fixedly connected to the gantry frame 6. The gantry frame 6 is rotatably connected to the transmission gear 7. Two transmission racks 5 are arranged opposite each other and mesh synchronously with the transmission gear 7. Furthermore, the lower left intelligent control compartment and the lower right cable terminal compartment are respectively fixedly connected to two L-shaped brackets 4; The top of the L-shaped bracket 4 is provided with a transmission slide groove 8 along the height of the cabinet. The outer sides of the high voltage switch compartment in the upper left area and the busbar compartment in the upper right area are both fixedly connected with transmission sliders 9 that are slidably set inside the transmission slide groove 8. Furthermore, guide rods 10 are symmetrically slidably connected to the gantry frame 6, and lifting rods 11 are fixedly connected to the bottom of the two guide rods 10. An electric push rod 12 for driving the lifting rods 11 to rise and fall is fixedly connected to the top of the gantry frame 6. The bottom of the lifting rod 11 is fixedly connected to a power rack 13 that meshes with the transmission gear 7, and the outer sides of the high voltage switch compartment in the upper left area and the busbar compartment in the upper right area are both fixedly connected to follower wheels 14 that roll against the top of the lifting rod 11. Furthermore, it also includes an air outlet 15 on the top of the cabinet body 2, an air inlet 16 on the side, and a pair of wind-gathering covers 17 symmetrically arranged on the top of the base 1. The output end of the wind concentrator 17 is provided with an elastic corrugated cover 18. When the cabinet body 2 moves left and right in sections, the elastic corrugated cover 18 abuts against its side wall and covers the outside of the air inlet 16. The air shroud 17 is equipped with a cooling fan 19 inside and a filter 20 at the input end; Furthermore, it also includes a pair of dehumidifying brackets 21 symmetrically fixedly connected to the top of the base 1. The dehumidifying brackets 21 have a restoration chamber 22 inside, and a molecular sieve 23 is slidably arranged inside the restoration chamber 22. The bottom of the wind-gathering hood 17 is provided with a U-shaped insertion port 24 that is compatible with the molecular sieve 23, and a heating restorer 28 with an output end extending into the restore chamber 22 is also provided on one side of the dehumidification bracket 21. Furthermore, the bottom of the molecular sieve 23 is symmetrically and fixedly connected with lifting slide rods 25, and the outer periphery of the lifting slide rods 25 is fitted with a return spring 26. The bottom of two adjacent lifting slide rods 25 is rotatably connected with a lifting slider 27. The reset spring 26 is located between the dehumidification bracket 21 and the lifting slider 27; Furthermore, it also includes a double-sided fixed rack 29 symmetrically fixedly connected to the top of the base 1, and a driven rack 30 slidably connected to the base 1; The bottom of both the lower left intelligent control compartment and the lower right cable terminal compartment is rotatably connected to a drive gear 31 that simultaneously meshes with the double-sided fixed rack 29 and the driven rack 30; One end of the driven rack 30 is fixedly connected to a grooved guide rod 32, and the lifting slider 27 is slidably disposed inside the grooved guide rod 32; Furthermore, the grooved guide rod 32 is internally connected with a horizontal section, a climbing section, and a lifting section in sequence from low to high; When the extendable support frame drives the cabin to unfold, the driven rack 30 is driven by the cooperation of the active gear 31 and the double-sided fixed rack 29 to move the grooved guide rod 32, so that the lifting slider 27 slides in different sections to adjust the transfer of molecular sieve 23 between the wind hood 17 and the restoration chamber 22, so as to realize the acceleration of air convection under high heat conditions or the dehumidification assistance of molecular sieve 23 under high humidity conditions.

[0023] In use, this ring main unit uses base 1 as the installation foundation. The interior of the cabinet body 2 is divided into the upper left high-voltage switch compartment, the upper right busbar compartment, the lower left intelligent control compartment, and the lower right cable terminal compartment through a cross-shaped rubber corrugated connecting layer 3. The cross-shaped rubber corrugated connecting layer 3 is made of aging-resistant nitrile rubber and has bidirectional expansion and contraction characteristics. It not only achieves effective isolation of each compartment, but also provides flexible support for the movement of the compartment. At the same time, with the layout design of upper and lower layer and left and right partition, the left intelligent control compartment and high-voltage switch compartment are far away from the right cable terminal compartment, which can reduce the interference of external moisture and dust on precision control components. The lower right cable terminal compartment is close to the bottom right side of the cabinet body 2, which can shorten the external wiring distance and reduce the wiring length. The vertical stacking layout effectively compresses the horizontal footprint, taking into account both compact requirements and convenient operation and maintenance. The extendable support frame and the cross-shaped rubber corrugated connection layer 3 together form a dynamic safety gap adjustment mechanism. During operation, it achieves bidirectional separation of the four compartments through mechanical transmission, thereby adjusting the safety gap between the compartments. When started, the electric push rod 12 on the gantry 6 drives the lifting rod 11 to rise and fall along the guide slide rod 10. The power rack 13 at the bottom of the lifting rod 11 meshes with the transmission gear 7 inside the gantry 6, driving the transmission gear 7 to rotate. Since the transmission racks 5 in the middle sections of the two L-shaped brackets 4 are set opposite each other and mesh synchronously with the transmission gear 7, when the transmission gear 7 rotates, it will drive the two L-shaped brackets 4 to move away from each other along the length of the base 1, thereby driving the lower left intelligent control compartment and the lower right cable terminal compartment fixed on the L-shaped brackets 4 to separate synchronously. Simultaneously, during the lifting and lowering process of the lifting rod 11, its top rolls against the follower wheels 14 on the outside of the upper left high-voltage switch compartment and the upper right busbar compartment, pushing the two upper compartments to move up and down along the transmission slide groove 8 on the top of the L-shaped bracket 4 via the transmission slider 9, thus separating the upper and lower compartments. During this process, the cross-shaped rubber corrugated connecting layer 3 is pulled and extended synchronously, and the safety gap between the four compartments is expanded accordingly. This counteracts the problem of reduced air insulation strength under high humidity conditions, avoids creepage, flashover and breakdown accidents, and achieves dynamic insulation protection. The air outlet 15 at the top of the cabinet body 2 and the air inlet 16 on the side form a heat dissipation channel. The air gathering cover 17 at the top of the base 1 is equipped with a cooling fan 19. The filter 20 at the input end can filter the incoming air to prevent dust from entering the cabinet. When the extendable support frame drives the compartment to separate, the left and right sides of the cabinet body 2 move along the length of the base 1. Its side wall abuts against the elastic corrugated cover 18 at the output end of the air gathering cover 17, squeezing the elastic corrugated cover 18 to cause it to contract and deform. At the same time, the elastic corrugated cover 18 relies on its own rebound force to tightly fit the outside of the air inlet 16 to ensure air intake sealing. At this time, the cooling fan 19 starts, drawing outside air through the filter 20, the air shroud 17, and the elastic corrugated shroud 18, and into the cabinet body 2 through the air inlet 16. After contacting and exchanging heat with the electrical components in the four compartments, the air is discharged through the air outlet 15, completing the heat dissipation. Because the safety gap increases after the compartments are separated, the cross-sectional area of ​​airflow inside the cabinet body 2 increases and the flow resistance decreases. Combined with the adjustment of the fan output power, the air convection efficiency is greatly improved, avoiding the accumulation of heat in stagnant hot air and effectively compensating for the loss of external heat dissipation space after the expansion of the compartments. The dehumidification bracket 21 at the top of the base 1 has a restoration chamber 22 inside. The molecular sieve 23 is slidably disposed in the restoration chamber 22. The return spring 26 on the outer periphery of the lifting slide rod 25 provides power for the reset of the molecular sieve 23. The lifting slider 27 is rotatably connected to the bottom of the lifting slide rod 25 and is slidably disposed inside the grooved guide rod 32 at one end of the driven rack 30. When the extendable support frame drives the compartment to separate, the intelligent control compartment in the lower left area and the cable terminal compartment in the lower right area synchronously drive the drive gear 31 at the bottom to move. The drive gear 31 rolls along the double-sided fixed rack 29 on the base 1 and meshes with the driven rack 30 at the same time, driving the driven rack 30 to drive the grooved guide rod 32 to move synchronously, thereby driving the lifting slider 27 to slide inside the grooved guide rod 32. Depending on the working conditions, the sliding trajectory of the lifting slider 27 is divided into two types: Under high heat conditions, the extendable support frame drives the compartment to unfold a short distance, and the safety gap is appropriately expanded. At this time, the lifting slider 27 slides in the horizontal section of the grooved guide rod 32, the molecular sieve 23 is still located in the restoration chamber 22, the cooling fan 19 increases the air volume, and the expanded safety gap and smooth air circulation accelerate the heat exchange inside the cabinet body 2 to achieve rapid heat dissipation under high heat. Under high humidity conditions, the extendable support frame drives the cabin to fully unfold, expanding the safety gap to its maximum. At this time, the lifting slider 27 moves along the climbing section of the grooved guide rod 32 to the lifting section, thereby pushing the lifting slide rod 25 to move upward, compressing the return spring 26 to deform, and causing the molecular sieve 23 to detach from the restoration chamber 22 and insert into the air shroud 17 through the U-shaped inlet 24 at the bottom of the air shroud 17. At this time, the cooling fan 19 increases the air volume. After the external air is filtered by the filter screen 20, it is then treated by the molecular sieve 23 to absorb moisture, becoming low humidity air that enters the cabinet body 2, effectively reducing the moisture content inside the cabinet body 2 and avoiding the problem of reduced insulation strength under high humidity conditions. At the same time, the dry air fills the expanded safety gap, further improving the insulation reliability. When the ambient humidity drops to a safe range and the internal temperature of the cabinet returns to normal, the extendable support frame moves in the opposite direction. The electric push rod 12 drives the lifting rod 11 to descend, which drives the power rack 13 and the transmission gear 7 to move in the opposite direction, so that the two L-shaped brackets 4 move closer to each other. As the lifting rod 11 descends, it also drives the upper compartment to move downward. The four compartments reset synchronously, and the cross-shaped rubber corrugated connecting layer 3 shrinks and returns to its original shape. At this time, the return spring 26 pushes the lifting slide bar 25 down, causing the molecular sieve 23 to detach from the wind collector shroud 17 and return to the interior of the restoration chamber 22. Subsequently, the heating restorer 28 is activated to heat and restore the molecular sieve 23, preparing it for the next dehumidification operation. At the same time, after the cabinet body 2 is reset, the elastic corrugated cover 18 releases its resistance and returns to its original state, and the cooling fan 19 is adjusted to normal power to maintain normal heat dissipation inside the cabinet body 2.

[0024] The working principle of the high-voltage terminal ring network box of the intelligent compact substation provided by this invention is as follows: First, this ring main unit uses base 1 as the overall load-bearing foundation. A cross-shaped structure precisely divides the main body 2 into the upper left high-voltage switch compartment, the upper right busbar compartment, the lower left intelligent control compartment, and the lower right cable terminal compartment, forming a physical isolation barrier to prevent interference between components in each compartment during operation. The flexible and expandable nature of the cross-shaped rubber corrugated connection layer 3 provides adaptive support for the bidirectional movement of the compartments. Simultaneously, the vertically layered and horizontally partitioned layout of the cabinet utilizes the principle of spatial partitioning to keep the precision control compartment on the left away from moisture and dust interference sources in the cable terminal compartment on the right. The lower right cable terminal compartment is aligned with the right-side inlet end of the cabinet bottom, following the principle of the shortest wiring path to shorten the external wiring distance. The vertically stacked layout, based on the principle of three-dimensional space utilization, compresses the horizontal footprint. The safety clearance adjustment between the four compartments inside the cabinet body 2 is achieved by a dynamic safety clearance adjustment mechanism consisting of an extendable support frame and a cross-shaped rubber corrugated connecting layer 3. Essentially, the lifting rod 11 is driven by an electric push rod 12 to make vertical lifting and lowering movements along the guide slide rod 10. The power rack 13 at the bottom of the lifting rod 11 meshes with the transmission gear 7 inside the gantry frame 6. By utilizing the rotation reversal principle of the gear, the vertical power of the lifting rod 11 is converted into the rotational power of the transmission gear 7. The transmission racks 5 in the middle of the two L-shaped brackets 4 mesh oppositely with the transmission gears 7 on both sides. Based on the principle of double racks in reverse linkage, the rotation of the transmission gears 7 will drive the two L-shaped brackets 4 to move horizontally away from each other along the length of the base 1, thereby causing the two lower compartments fixed on the L-shaped brackets 4 to separate horizontally in sync. While achieving horizontal separation of the cabins to the left and right, the upper and lower layers of the cabins are separated by the principle of rolling contact and sliding guidance: During the vertical lifting and lowering of the lifting rod 11, its top forms rolling contact with the follower wheels 14 on the outer side of the two upper cabins, transmitting vertical thrust to the upper cabin. The upper cabin, through the transmission slider 9, forms a sliding engagement with the transmission groove 8 on the top of the L-shaped bracket 4. The transmission groove 8 provides vertical sliding guidance for the upper cabin, allowing the two upper cabins to move vertically away from the lower cabin. During this process, the cross-shaped rubber corrugated connecting layer 3 extends synchronously with the bidirectional separation of the four cabins. Based on the positive correlation between insulation distance and breakdown voltage, the safety gap between the cabins expands uniformly as the connecting layer extends, thereby offsetting the problem of reduced air insulation strength in high humidity environments, improving insulation protection capability from the perspective of physical distance, and achieving dynamic insulation protection. The air outlet 15 at the top of the cabinet body 2 and the air inlet 16 on the side form a vertical airflow cooling duct, which follows the principle of hot air rising to achieve rapid exhaust of hot air inside the cabinet. The wind-gathering shroud 17 at the top of the base 1 and the internal cooling fan 19 form a wind power delivery unit to provide power for the delivery of external cold air. When the extendable support frame drives the cabin to separate left and right, the side wall of the cabinet body 2 comes into contact with the elastic corrugated cover 18 at the output end of the wind-gathering shroud 17. The elastic corrugated cover 18 is compressed and deformed, and at the same time, it relies on its own elastic rebound force to fit tightly against the side wall of the cabinet, completely covering the air inlet 16, achieving a seal of the air intake channel and preventing cold air leakage during the heat dissipation process. Under the suction of the cooling fan 19, the external cold air passes through the filter screen 20 to filter impurities, and then passes through the wind-gathering shroud 17 and the elastic corrugated cover 18 in sequence to enter the cabinet from the air inlet 16. After completing heat exchange with the electrical components of each compartment, it is discharged from the air outlet 15. After the compartments separate, the safety gap increases, which increases the cross-sectional area for air circulation inside the cabinet and reduces the flow resistance. Based on the principle of the negative correlation between fluid resistance and flow efficiency, and with the power adjustment of the cooling fan 19, the air convection efficiency inside the cabinet is greatly improved, effectively compensating for the loss of external heat dissipation space after the compartments expand, and ensuring that the heat dissipation effect does not decrease. When the extendable support frame drives the lower chamber to move horizontally, the drive gear 31 at the bottom of the chamber rolls along the double-sided fixed rack 29 on the base 1. Utilizing the rolling meshing principle of the gear along the rack, the rotation of the drive gear 31 will drive the meshing driven rack 30 to move horizontally, thereby driving the grooved guide rod 32 connected to the driven rack 30 to move horizontally synchronously. The movement of the grooved guide rod 32 will drive the lifting slider 27 to slide along its internal trajectory. Based on the segmental guiding principle of the grooved guide rod, the sliding of the lifting slider 27 in different segments will realize different working states of the molecular sieve 23. Under high-heat conditions, the extendable support frame drives the cabin to separate over a short distance, and the safety gap is appropriately expanded. At this time, the lifting slider 27 slides along the horizontal section of the grooved guide rod 32, and the molecular sieve 23 remains in the restoration chamber 22 without intervening in the work. It only relies on the expanded safety gap to improve the air circulation efficiency inside the cabinet, and in conjunction with the cooling fan 19 to increase the air volume, the heat accumulated inside the cabinet is quickly discharged by strengthening the air convection. Under high humidity conditions, the extendable support frame drives the cabin to completely separate, and the safety gap is expanded to the maximum. At this time, the lifting slider 27 moves to the lifting section along the climbing section of the grooved guide rod 32. The vertical lifting force of the lifting slider 27 pushes the lifting slide rod 25 to move upward, compressing the reset spring 26 to store elastic potential energy. At the same time, it drives the molecular sieve 23 to detach from the restoration chamber 22 and embed into the air collector 17 through the U-shaped insertion port 24 at the bottom of the air collector 17. At this time, the cooling fan 19 increases the air volume. The external cold air is treated by the physical moisture absorption principle of the molecular sieve 23 and becomes low humidity air before entering the cabinet. This reduces the moisture content inside the cabinet and fills the expanded safety gap with dry air, further improving the air insulation strength and achieving insulation protection and dehumidification synergy under high humidity conditions. Once the ambient humidity drops to a safe range and the internal temperature of the cabinet returns to normal, the entire equipment automatically resets each mechanism based on the principle of mechanical reverse transmission and elastic reset, forming a cyclical protection. The electric push rod 12 of the extendable support frame drives the lifting rod 11 to descend vertically in the reverse direction. Through the power rack 13, it drives the transmission gear 7 to rotate in the reverse direction, causing the two L-shaped supports 4 to move closer to each other along the length of the base 1. At the same time, the contact force between the lifting rod 11 and the follower wheel 14 disappears, and the upper chamber descends vertically along the transmission slide 8. The four chambers reset synchronously, and the cross-shaped rubber corrugated connecting layer 3 recovers its original shape by its own elastic contraction. Meanwhile, the reset spring 26 in the dehumidification mechanism releases the stored elastic potential energy, pushing the lifting slide 25 to descend vertically, causing the molecular sieve 23 to detach from the wind collector shroud 17 and reset into the restoration chamber 22. Subsequently, the heating restorer 28 is activated. Based on the thermal desorption principle of the molecular sieve, the water vapor adsorbed by the molecular sieve 23 is desorbed and discharged through heating, completing the regeneration and restoration of the molecular sieve 23 and preparing it for the next dehumidification operation. In the heat dissipation mechanism, after the cabinet body 2 is reset, the resistance between it and the elastic corrugated cover 18 is released. The elastic corrugated cover 18 returns to its original state by its own elasticity. The cooling fan 19 is adjusted to normal power to maintain normal air circulation and heat dissipation inside the cabinet. After each mechanism is reset, it enters the standby state to realize the cyclic protection operation of the entire equipment.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-voltage terminal ring network box for an intelligent compact substation, characterized in that: Includes a base (1), on which a cabinet body (2) is provided; The cabinet body (2) is provided with a cross-shaped rubber corrugated connection layer (3) made of aging resistant nitrile rubber. The cross-shaped rubber corrugated connection layer (3) divides the cabinet body (2) into the upper left high-voltage switch compartment, the upper right bus compartment, the lower left intelligent control compartment and the lower right cable terminal compartment. The cross-shaped rubber corrugated connection layer (3) has bidirectional expansion and contraction characteristics. The base (1) is also provided with an extendable support frame, which is connected to the four compartments of the cabinet body (2) respectively. The extendable support frame and the cross-shaped rubber corrugated connection layer (3) together form a dynamic safety gap adjustment mechanism. The extendable support frame is used to drive the left compartment and the right compartment to move away from each other along the length of the base (1), and simultaneously drive the upper compartment to move away from the lower compartment along the height of the cabinet. The cross-shaped rubber corrugated connecting layer (3) is pulled to extend the safety gap between the four compartments.

2. The high-voltage terminal ring network box of an intelligent compact substation according to claim 1, characterized in that: The cabinet body (2) adopts a layout of upper and lower layers and left and right partitions. The intelligent control compartment on the left and the high voltage switch compartment in the upper left area are far away from the cable terminal compartment on the right. The cable terminal compartment is located on the bottom right side of the cabinet body (2) to shorten the external wiring distance. The compartments are isolated by a cross-shaped rubber corrugated connection layer (3) to achieve interference prevention of components on the same layer and longitudinal stacking to compress the floor space.

3. The high-voltage terminal ring network box of an intelligent compact substation according to claim 1, characterized in that: The extendable support frame includes two L-shaped brackets (4) symmetrically slidably connected to the top of the base (1), and a transmission rack (5) is provided in the middle section of each of the two L-shaped brackets (4). The base (1) is fixedly connected to a gantry frame (6) at one end. A transmission gear (7) is rotatably connected inside the gantry frame (6). Two transmission racks (5) are arranged opposite each other and mesh synchronously with the transmission gear (7).

4. The high-voltage terminal ring network box of an intelligent compact substation according to claim 3, characterized in that: The lower left intelligent control compartment and the lower right cable terminal compartment are respectively fixedly connected to two L-shaped brackets (4); The top of the L-shaped bracket (4) is provided with a transmission groove (8) along the height direction of the cabinet. The upper left high-voltage switch compartment and the upper right busbar compartment are both fixedly connected with transmission sliders (9) that are slidably set inside the transmission groove (8).

5. The high-voltage terminal ring network box of an intelligent compact substation according to claim 4, characterized in that: The gantry (6) is symmetrically slidably connected with guide slide rods (10), and the bottom of the two guide slide rods (10) is fixedly connected with lifting rods (11). The top of the gantry (6) is fixedly connected with an electric push rod (12) for driving the lifting rods (11) to rise and fall. The bottom of the lifting rod (11) is fixedly connected to a power rack (13) that meshes with the transmission gear (7), and the outer sides of the high voltage switch compartment in the upper left zone and the busbar compartment in the upper right zone are both fixedly connected to follower wheels (14) that roll against the top of the lifting rod (11).

6. The high-voltage terminal ring network box of an intelligent compact substation according to claim 1, characterized in that: It also includes an air outlet (15) on the top of the cabinet body (2), an air inlet (16) on the side, and a pair of wind-gathering hoods (17) symmetrically arranged on the top of the base (1). The output end of the wind-gathering hood (17) is provided with an elastic corrugated hood (18). When the cabinet body (2) moves left and right in sections, the elastic corrugated hood (18) abuts against its side wall and covers the outside of the air inlet (16). The air shroud (17) is equipped with a cooling fan (19) inside and a filter screen (20) at the input end.

7. The high-voltage terminal ring network box of an intelligent compact substation according to claim 6, characterized in that: It also includes a pair of dehumidifying brackets (21) symmetrically fixedly connected to the top of the base (1), and a restoration chamber (22) is opened inside the dehumidifying bracket (21), and a molecular sieve (23) is slidably arranged inside the restoration chamber (22). The bottom of the wind-gathering hood (17) is provided with a U-shaped inlet (24) that is compatible with the molecular sieve (23), and a heating restorer (28) with its output end extending into the restore chamber (22) is also provided on one side of the dehumidification bracket (21).

8. The high-voltage terminal ring network box of an intelligent compact substation according to claim 7, characterized in that: The molecular sieve (23) is symmetrically fixedly connected to the bottom of the lifting slide rod (25), and the outer periphery of the lifting slide rod (25) is fitted with a return spring (26). The bottom of two adjacent lifting slide rods (25) is rotatably connected to a lifting slider (27). The reset spring (26) is disposed between the dehumidification bracket (21) and the lifting slider (27).

9. The high-voltage terminal ring network box of an intelligent compact substation according to claim 8, characterized in that: It also includes a double-sided fixed rack (29) symmetrically fixed to the top of the base (1), and a driven rack (30) slidably connected to the base (1). The bottom of the lower left intelligent control compartment and the lower right cable terminal compartment are both rotatably connected to a drive gear (31) that meshes with both the double-sided fixed rack (29) and the driven rack (30). One end of the driven rack (30) is fixedly connected to a grooved guide rod (32), and the lifting slider (27) is slidably disposed inside the grooved guide rod (32).

10. The high-voltage terminal ring network box of an intelligent compact substation according to claim 9, characterized in that: The grooved guide rod (32) is provided with a horizontal section, a climbing section and a lifting section connected in sequence from low to high inside; When the extendable support frame drives the cabin to unfold, the driven rack (30) is driven by the cooperation of the active gear (31) and the double-sided fixed rack (29) to move the grooved guide rod (32), so that the lifting slider (27) slides in different sections to adjust the transfer of molecular sieve (23) between the wind hood (17) and the recovery chamber (22), thereby realizing the acceleration of air convection under high heat conditions or the dehumidification assistance of molecular sieve (23) under high humidity conditions.

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