Safety protection device for box-type substation

Abstract

The present application relates to the field of substation safety protection equipment, and particularly relates to a safety protection device for box-type substation, which comprises a foundation plate, constituting an integral installation foundation; an overhead base, arranged above the foundation plate, used for supporting the substation body and forming a ventilation gap between the substation body and the foundation plate; and a substation body, arranged above the overhead base, and provided with a water-cooling partition inside, used for containing cooling liquid to absorb the heat generated inside the substation. The ventilation gap between the substation body and the foundation plate is formed through the overhead base, improving the ventilation and heat dissipation conditions at the bottom. The heat carried by the cooling liquid is conducted to the stratum through the buried heat dissipation pipe embedded in the stratum, and the double-shaft motor is used to synchronously drive the bellows and the water pump, so that the rotation speed of the fan is adapted to the rotation speed of the water pump. The effective working area of the sliding fan blade is adjusted through the active heat dissipation assembly, the air-cooled pumping power is finely adjusted, and the adaptive change of the heat dissipation load is realized.

Description

Technical Field

[0001] This invention relates to the field of substation safety protection equipment, specifically to a safety protection device for a prefabricated substation. Background Technology

[0002] Prefabricated substations, as a highly integrated power distribution device, integrate core electrical components such as high-voltage switchgear, distribution transformers, and low-voltage distribution equipment within a closed enclosure. They are widely used in urban power grid upgrades, power supply for industrial and mining enterprises, residential community power distribution, commercial plazas, and infrastructure construction, offering advantages such as small footprint, convenient installation, short construction period, and strong environmental adaptability. With the continuous growth of urban electricity load and the increasing power density of electrical equipment, the heat generated by the components inside prefabricated substations during operation is becoming increasingly concentrated. Temperature rise control inside the enclosure directly affects the insulation life, operational reliability, and overall safety performance of the electrical equipment. Therefore, heat dissipation and protection capabilities have become a key indicator for evaluating the comprehensive performance of prefabricated substations.

[0003] Most conventional prefabricated substations currently employ a combination of natural ventilation and axial fan cooling. Ventilation louvers are installed on the side walls of the enclosure, relying on natural air convection or forced exhaust by fans to remove internal heat. While this method is simple in structure and low in cost, its heat dissipation efficiency is limited. During hot summer months or under heavy loads, heat cannot be dissipated promptly, leading to persistently high internal temperatures. This accelerates the aging of electrical component insulation, shortens equipment lifespan, and in severe cases, can even cause overheating, burnout, short circuits, and fires. Furthermore, while the ventilation louvers allow airflow, they also provide a pathway for external dust, moisture, and rain to enter the enclosure. Over time, this can cause dust accumulation and moisture buildup on internal components, degrading insulation performance and hindering the safe and stable operation of the equipment.

[0004] Secondly, some prefabricated substations employ water cooling, using water-cooled pipes inside the enclosure to circulate coolant and remove internal heat. However, in existing water cooling solutions, the cooling water pump and cooling fan are typically driven by independent motors, and the pump speed and fan speed cannot be synchronized. When the internal heat generation is low, the pump and fan continue to operate at high speed, resulting in unnecessary energy waste; when the internal heat generation increases sharply, the pump and fan cannot simultaneously increase their cooling capacity, leading to a lag in heat dissipation response. This makes it difficult to achieve adaptive matching between cooling capacity and the actual heat load, and overall energy consumption control and heat dissipation efficiency need improvement.

[0005] Furthermore, most existing heat dissipation devices have fixed cooling power, and the effective working area of ​​the fan blades is not adjustable. The cooling capacity can only be changed by starting or stopping the fan or adjusting the fan speed. Relying solely on speed adjustment has problems such as limited adjustment range, low cooling efficiency at low speeds, and increased noise and vibration at high speeds. It is impossible to finely adjust the air-cooled output power according to the real-time temperature and load conditions inside the prefabricated substation, making it difficult to meet the cooling needs and energy-saving requirements under different operating conditions.

[0006] Furthermore, existing prefabricated substations are typically installed directly on the ground, with the bottom of the enclosure tightly fitted to the ground. This results in poor ventilation and heat dissipation at the bottom, and in rainy and humid environments, water can easily seep into the bottom of the enclosure, causing electrical components to become damp and corrode. At the same time, current technology fails to fully utilize the natural characteristics of the underground strata, which have a relatively constant temperature and strong heat storage capacity year-round. It lacks an effective structure for passively dissipating internal heat to the ground, leading to high energy consumption for heat dissipation and insufficient heat dissipation protection in high-temperature outdoor environments. Summary of the Invention

[0007] The purpose of this invention is to provide a safety protection device for a prefabricated substation to solve the above-mentioned problems. This device uses an overhead base to create a ventilation gap between the substation body and the ground substrate, improving bottom ventilation and heat dissipation. It utilizes buried heat dissipation pipes embedded in the ground to conduct heat carried by the coolant to the ground, achieving low-energy passive heat dissipation. A dual-axis motor synchronously drives the fan box and water pump, matching the fan speed with the water pump speed to achieve coordinated air cooling and water cooling. Furthermore, the active heat dissipation components adjust the effective working area of ​​the sliding fan blades, finely regulating the air-cooled pump power to achieve adaptive changes in the heat dissipation load, as detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a safety protection device for a prefabricated substation, comprising: The base plate forms the overall installation foundation; An overhead base is installed above the ground substrate to support the substation body and create a ventilation gap between it and the ground substrate. The substation body is located above the overhead base. The substation body is equipped with a water-cooled partition to accommodate coolant and absorb the heat generated during operation inside the substation. The underground heat dissipation pipe is pre-embedded in the stratum below the ground substrate and is used to conduct the heat carried by the coolant to the stratum to achieve passive heat dissipation. A dual-axis motor is fixed to the top side of the base plate. The two ends of the dual-axis motor are respectively connected to a wind box and a water pump to synchronously drive the air cooling and water cooling circulation. The bellows is connected to one end of the dual-shaft motor, and the outer side of the bellows corresponds to the auxiliary radiator, which is used to pump cooling airflow to the auxiliary radiator. An auxiliary radiator is provided on the outside of the air box. The auxiliary radiator is provided with an inlet cover and an outlet cover for air cooling of the flowing coolant. A water pump is connected to the other end of the dual-shaft motor. The pump inlet pipe of the water pump is connected to the liquid outlet side of the water-cooled partition, and the pump outlet pipe of the water pump is connected to the liquid inlet cover. It is used to pump the heat-absorbing coolant into the auxiliary radiator. An active cooling component is installed inside the air box to adjust the air-cooled pump power to match the heat dissipation load.

[0009] Under normal operating conditions, the dual-axis motor synchronously drives the air box and water pump. The water pump pumps the coolant that has absorbed heat in the water-cooled partition into the auxiliary radiator. The air box pumps airflow to the auxiliary radiator for air cooling. The cooled coolant is then guided through the auxiliary radiator's outlet shroud into the buried heat pipe. The buried heat pipe conducts residual heat to the ground. Finally, the cooled coolant flows back to the water-cooled partition, forming a closed loop and achieving coordinated cooling through air cooling and buried passive heat dissipation. When the internal heat generation increases and enhanced cooling is required, the active cooling component adjusts the extension length of the sliding fan blades to increase the effective working area of ​​the fan blades and improve the air cooling pump power, achieving adaptive adjustment of the heat dissipation load.

[0010] When using the above-mentioned safety protection device for a prefabricated substation, the operating steps are as follows: The base plate is fixed horizontally to the installation ground. The reciprocating tubes of the buried heat dissipation pipes are arranged in a serpentine pattern and pre-embedded in the soil layer below the base plate. The inlet and outlet pipes of the buried heat dissipation pipes pass upward through the pipe holes of the base plate and the overhead base, with reserved connection interfaces.

[0011] The base plate of the overhead base is fixed to the top side of the ground base plate, and the end plates and side plates are installed together to form a support frame. The reinforcing ribs on the outside of the side plates enhance the structural strength of the frame. The substation body is hoisted and placed above the overhead base, so that a ventilation gap is formed between the bottom of the substation body and the ground base plate, improving the air circulation at the bottom.

[0012] The dual-shaft motor is fixed to the top side of the base plate via a motor mount. One end of the motor shaft is connected to the fan blade shaft of the air box via a transmission bolt, and the other end of the motor shaft is connected to the impeller shaft of the water pump via a transmission bolt, thus completing the assembly of the power components.

[0013] Align the air collection shroud of the wind box with the auxiliary radiator and install the air inlet screen on the air inlet side of the wind box; connect the liquid inlet shroud of the auxiliary radiator to the pump outlet pipe of the water pump through the liquid inlet connector, and connect the liquid outlet shroud to the liquid inlet pipe of the buried heat dissipation pipe through the liquid outlet connector; connect the pump inlet pipe of the water pump to the liquid outlet side of the water-cooled partition of the substation body, and connect the liquid outlet pipe of the buried heat dissipation pipe to the liquid inlet side of the water-cooled partition, forming a closed coolant circulation loop.

[0014] The active cooling component is installed inside the air box, the transmission cover is fixed in the air box cavity, the motor mounting cylinder is fixed in the center of the transmission cover, the fine-tuning motor is installed in the motor mounting cylinder, the synchronous gear ring is fixed to the output end of the fine-tuning motor, several transmission screws are arranged circumferentially in the transmission cover and positioned by the screw rotating seat, the gear at the end of each transmission screw meshes with the synchronous gear ring, and the sliding fan blade is threaded with the transmission screw through the nut seat and embedded in the sliding groove on the inner wall of the transmission cover.

[0015] During normal operation, the dual-axis motor synchronously drives the air box and water pump. The water pump drives the coolant to circulate between the water-cooled partition, auxiliary radiator, and underground heat dissipation pipe. After absorbing the heat inside the substation body, the coolant is cooled by air through the auxiliary radiator and then conducted to the ground by the underground heat dissipation pipe, thus achieving a combination of passive heat dissipation and air cooling. The airflow pumped by the air box passes through the heat dissipation fins of the auxiliary radiator and then enters the interior of the enclosure through the diffuser holes on the side wall of the substation body, enhancing the internal air circulation.

[0016] When the internal temperature of the substation rises and the heat dissipation demand increases, the fine-tuning motor starts and drives the synchronous gear ring to rotate. Through the meshing of the synchronous gear ring with several gears, it drives several transmission screws to rotate synchronously. The threaded engagement between the transmission screws and the nut seat drives several sets of sliding fan blades to slide outward synchronously along the slide groove, increasing the length of the sliding fan blades extending out of the transmission cover, thereby increasing the effective working area of ​​the fan blades, improving the air-cooled pump's air delivery force, and enhancing the heat dissipation capacity. When the internal temperature decreases and the heat dissipation demand decreases, the fine-tuning motor rotates in the opposite direction, driving the sliding fan blades to retract along the slide groove, reducing the effective working area of ​​the fan blades, reducing the air-cooling power, and achieving adaptive adjustment of the heat dissipation load.

[0017] Preferably, the elevated base includes a base plate, an end plate, and a side plate. The base plate is fixed to the top side of the ground substrate. The end plate and the side plate form a support frame. The side plate has through holes for the underground heat dissipation pipes to pass through. The side plate has reinforcing ribs on its outer side to enhance the structural strength of the elevated base.

[0018] Preferably, the substation body includes corner wall panels, a top plate, and side door panels. The corner wall panels enclose the box to form the side wall of the box, the top plate covers the top of the box, the water-cooled partition is disposed inside the box, the corner wall panels are provided with diffusion holes for diffusing the airflow pumped by the air box into the box, and the side door panels are provided with observation ports for observing the internal operating status of the box.

[0019] Preferably, the pump inlet pipe of the water pump is connected to the liquid outlet side of the water-cooled partition, the pump outlet pipe is connected to the liquid inlet cover of the auxiliary radiator, the liquid outlet cover of the auxiliary radiator is connected to the liquid inlet pipe of the buried heat dissipation pipe, and the liquid outlet pipe of the buried heat dissipation pipe is connected to the liquid inlet side of the water-cooled partition, thus forming a closed coolant circulation loop.

[0020] Preferably, the buried heat dissipation pipe includes a reciprocating pipe body, an outlet pipe, and an inlet pipe. The reciprocating pipe body is pre-buried in the stratum in a serpentine reciprocating arrangement to increase the heat exchange area with the stratum. The inlet pipe and the outlet pipe are respectively connected to the two ends of the reciprocating pipe body to realize the inflow and outflow of coolant.

[0021] Preferably, the dual-shaft motor includes a motor body, a motor shaft, transmission bolts, and a motor base. The motor body is fixed to the top side of the base plate by the motor base. The motor shaft extends from both ends of the motor body. The two motor shafts are respectively connected to the fan blade shaft of the air box and the impeller shaft of the water pump by transmission bolts, so as to realize the synchronous drive of the air box and the water pump.

[0022] Preferably, the air box includes an air collecting hood and an air inlet screen. The air collecting hood is located on the air outlet side of the air box and is used to collect airflow and guide it to the auxiliary radiator. The air inlet screen is located on the air inlet side of the air box and is used to filter the air entering the air box and prevent foreign objects from being sucked in.

[0023] Preferably, the auxiliary radiator includes heat dissipation fins, a liquid inlet cover, and a liquid outlet cover. The heat dissipation fins are disposed between the liquid inlet cover and the liquid outlet cover to increase the heat exchange area between the coolant and the airflow. A liquid inlet connector is provided on the outside of the liquid inlet cover for connecting to the pump outlet pipe of the water pump. A liquid outlet connector is provided on the outside of the liquid outlet cover for connecting to the liquid inlet pipe of the buried heat dissipation pipe.

[0024] Preferably, the active heat dissipation component includes a transmission cover, a motor mounting cylinder, and a fine-tuning motor. The inner wall of the transmission cover is provided with a sliding groove, and a screw rotating seat is provided at the end of the transmission cover. The motor mounting cylinder is fixed in the center of the transmission cover, and the fine-tuning motor is installed in the motor mounting cylinder. A synchronous gear ring is fixed at the output end of the fine-tuning motor.

[0025] Preferably, the transmission cover has several transmission screws arranged circumferentially inside, each transmission screw having a gear at one end that meshes with a synchronous gear ring. A sliding fan blade is fitted onto the transmission screw, and a nut seat with a threaded engagement with the transmission screw is provided on the inner side of the sliding fan blade. The sliding fan blade is embedded in a groove. The fine-tuning motor drives the synchronous gear ring to rotate, and the meshing of the synchronous gear ring with the gear drives the transmission screw to rotate. The threaded engagement between the transmission screw and the nut seat drives the sliding fan blade to slide out along the groove, thereby changing the effective working area of ​​the sliding fan blade to adjust the air-cooled pumping power.

[0026] The beneficial effects are as follows: 1. By pre-burying underground heat dissipation pipes under the subfloor, the invention utilizes the natural characteristics of the underground stratum, which has a relatively constant temperature and strong heat storage capacity, to conduct the heat carried by the coolant to the stratum to achieve passive heat dissipation, which greatly reduces heat dissipation energy consumption. At the same time, it is combined with the air cooling heat dissipation of the auxiliary radiator to form a composite heat dissipation mode that combines air cooling and underground heat conduction, which significantly improves the heat dissipation protection capability of the prefabricated substation in high-temperature environments.

[0027] 2. The dual-axis motor synchronously drives the fan box and water pump, so that the fan speed and water pump speed are naturally matched. This changes the problem of independent drive of the fan and water pump in the traditional solution and the speed cannot be matched. It realizes the linkage and coordination of air cooling flow and water cooling circulation flow, avoids overload or inefficient operation of a single system, improves the overall heat dissipation efficiency and reduces energy consumption.

[0028] 3. The active heat dissipation component drives the synchronous gear ring to rotate via a fine-tuning motor. The meshing of the synchronous gear ring and gears drives multiple transmission screws to rotate synchronously. Through the threaded engagement of the screws and nut seats, multiple sets of sliding fan blades are driven to extend and retract synchronously along the slide groove, changing the effective working area of ​​the fan blades. This allows for precise adjustment of the air-cooled pumping power without changing the motor speed. It has a wide adjustment range and fast response speed, and can adaptively match the heat dissipation output according to the internal temperature and load conditions of the substation, taking into account both heat dissipation effect and energy saving requirements.

[0029] 4. By raising the substation body using an overhead base, a ventilation gap is created between the bottom of the substation body and the ground plate, improving the air circulation at the bottom and avoiding poor heat dissipation and water accumulation caused by the bottom of the enclosure directly contacting the ground, thus improving the operational safety of the equipment in humid and rainy environments.

[0030] 5. The water-cooled partition is located inside the substation body and absorbs the heat generated by the internal components. The airflow pumped by the air box enters the box through the diffuser holes on the side wall after passing through the auxiliary radiator, forming a dual heat dissipation path of water-cooled heat absorption and air-cooled convection. The heat dissipation is uniform, effectively reducing the overall temperature rise inside the box and ensuring the safe operation of electrical equipment.

[0031] 6. The buried heat dissipation pipe adopts a serpentine reciprocating pipe structure to increase the contact heat exchange area with the ground and improve the ground's heat conduction efficiency; the auxiliary radiator is equipped with heat dissipation fins to increase the heat exchange area, and with the air box for centralized air supply, the heat dissipation efficiency is high; the overall structure has a high degree of integration, and the functional modules are arranged compactly, which is convenient for installation and maintenance, and is suitable for the safety protection of box-type substations under complex working conditions such as outdoor, high temperature, and high humidity. Attached Figure Description

[0032] 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, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a three-dimensional structural breakdown diagram of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of another aspect of the present invention; Figure 5 This is a three-dimensional structural disassembly diagram of another aspect of the present invention; Figure 6 This is a structural breakdown diagram of the substation body of the present invention; Figure 7 This is a three-dimensional structural diagram of the underground heat dissipation pipe of the present invention; Figure 8 This is a three-dimensional structural diagram of the bellows of the present invention; Figure 9 This is a three-dimensional structural schematic diagram of the dual-axis motor of the present invention; Figure 10 This is a three-dimensional structural disassembled diagram of the water pump of the present invention; Figure 11 This is a three-dimensional structural breakdown diagram of the active heat dissipation component of the present invention.

[0034] The annotations in the attached figures are explained as follows: 1. Ground base plate; 2. Elevated base; 201. Base plate; 202. End plate; 203. Side plate; 203a. Pipe hole; 204. Reinforcing rib; 3. Substation body; 301. Corner wall plate; 302. Top plate; 303. Water-cooled partition; 304. Diffusive hole; 305. Side door panel; 305a. Observation port; 4. Buried heat dissipation pipe; 401. Reciprocating pipe body; 402. Liquid outlet pipe; 403. Liquid inlet pipe; 5. Air box; 501. Gas collection hood; 502. Air inlet mesh cover; 6. Auxiliary radiator; 601. Heat dissipation fins; 602. Liquid inlet hood; 6 02a, Liquid inlet connector; 603, Liquid outlet cover; 603a, Liquid outlet connector; 7, Dual-shaft motor; 701, Motor body; 702, Motor shaft; 703, Transmission bolt; 704, Motor base; 8, Water pump; 801, Pump inlet pipe; 802, Pump outlet pipe; 9, Active cooling assembly; 901, Transmission cover; 901a, Slide groove; 901b, Screw rotating seat; 902, Motor mounting cylinder; 903, Fine-tuning motor; 903a, Synchronous gear ring; 904, Transmission screw; 904a, Gear; 905, Sliding fan blade; 905a, Nut seat. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0036] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] See Figures 1-11 As shown, the present invention provides a safety protection device for a prefabricated substation, comprising: The base plate 1 forms the overall installation foundation, which is used to provide a stable installation bearing surface for the upper components such as the overhead base 2 and the dual-axis motor 7, and also serves as the positioning reference for the pre-embedded construction of the underground heat dissipation pipe 4. The overhead base 2 is set above the ground base plate 1 to support the substation body 3 and form a ventilation gap between it and the ground base plate 1, thereby improving the air circulation conditions at the bottom of the substation body 3 and avoiding poor heat dissipation and water accumulation caused by the bottom directly contacting the ground. The substation body 3 is set above the overhead base 2. The substation body 3 is equipped with a water-cooled partition 303, which is used to contain the coolant to absorb the heat of the substation's internal operation and serve as the heat absorption end for water-cooled heat dissipation, transferring the heat generated by the internal components to the circulating coolant. The underground heat dissipation pipe 4 is pre-buried in the stratum below the base plate 1. It is used to conduct the heat carried by the coolant to the stratum and realize low-energy passive heat dissipation by taking advantage of the relatively constant temperature and strong heat storage capacity of the underground stratum. The dual-axis motor 7 is fixed on the top side of the base plate 1. The two ends of the dual-axis motor 7 are respectively connected to the air box 5 and the water pump 8 to drive the air cooling and water cooling circulation synchronously, so that the fan speed and the water pump speed are naturally matched, and the air cooling flow rate and the water cooling circulation flow rate are coordinated. The air box 5 is connected to one end of the dual-shaft motor 7. The outer side of the air box 5 corresponds to the auxiliary radiator 6. It is used to pump cooling airflow to the auxiliary radiator 6 and force the coolant flowing inside the auxiliary radiator 6 to be cooled by air. The auxiliary radiator 6 is located outside the air box 5. The auxiliary radiator 6 is equipped with an inlet cover 602 and an outlet cover 603. It is used to cool the flowing coolant by air and serves as an active heat dissipation link in the water cooling cycle to quickly reduce the coolant temperature. The water pump 8 is connected to the other end of the dual-shaft motor 7. The pump inlet pipe 801 of the water pump 8 is connected to the liquid outlet side of the water-cooled partition 303, and the pump outlet pipe 802 of the water pump 8 is connected to the liquid inlet cover 602. It is used to pump the heat-absorbing coolant into the auxiliary radiator 6 to provide circulating power for the entire water-cooled circulation loop. The active cooling component 9 is located inside the air box 5 and is used to adjust the air-cooling pump power to match the heat dissipation load. It achieves fine adjustment of air-cooling output by changing the effective working area of ​​the fan blades.

[0040] Under normal operating conditions, the dual-axis motor 7 synchronously drives the air box 5 and the water pump 8 to operate. The water pump 8 pumps the coolant that has absorbed heat in the water-cooled partition 303 into the auxiliary radiator 6. The air box 5 pumps airflow to the auxiliary radiator 6 for air cooling. The cooled coolant is then introduced into the buried heat pipe 4 through the liquid outlet 603 of the auxiliary radiator 6. The residual heat is conducted to the ground through the buried heat pipe 4. Finally, the cooled coolant flows back to the water-cooled partition 303, forming a closed loop and realizing the combined heat dissipation of air cooling and buried passive heat dissipation. When the internal heat generation increases and heat dissipation needs to be enhanced, the active heat dissipation component 9 adjusts the extension length of the sliding fan blade 905 to increase the effective working area of ​​the fan blade and increase the air cooling pumping power, realizing the adaptive adjustment of the heat dissipation load.

[0041] As an optional implementation, the overhead base 2 includes a base plate 201, an end plate 202, and a side plate 203. The base plate 201 is fixed to the top side of the ground base plate 1. The end plate 202 and the side plate 203 enclose each other to form a support frame. The side plate 203 has a through hole 203a for the pipe of the buried heat dissipation pipe 4 to pass through. The side plate 203 has a reinforcing rib 204 on the outside to enhance the structural strength of the overhead base 2. With this configuration, the enclosed frame structure provides stable support for the substation body 3. The through hole 203a facilitates the connection of the pipe of the buried heat dissipation pipe 4 from the bottom. The reinforcing rib 204 improves the deformation resistance of the frame and ensures the structural reliability under heavy load conditions.

[0042] As an optional implementation, the substation body 3 includes a corner wall panel 301, a top plate 302, and a side door panel 305. The corner wall panel 301 encloses to form the side wall of the enclosure, the top plate 302 covers the top of the enclosure, and the water-cooled partition 303 is disposed inside the enclosure. The corner wall panel 301 is provided with a diffusion hole 304 for diffusing the airflow pumped by the air box 5 into the enclosure. The side door panel 305 is provided with an observation port 305a for observing the operating status inside the enclosure. With this configuration, the water-cooled partition 303, located inside the enclosure, can fully absorb the heat of the rising hot air inside. The diffusion hole 304 allows the air-cooled airflow to enter the enclosure and form convection. The observation port 305a allows maintenance personnel to check the operating status of the internal equipment without opening the door.

[0043] As an optional implementation, the pump inlet pipe 801 of the water pump 8 is connected to the liquid outlet side of the water-cooled partition 303, the pump outlet pipe 802 is connected to the liquid inlet cover 602 of the auxiliary radiator 6, the liquid outlet cover 603 of the auxiliary radiator 6 is connected to the liquid inlet pipe 403 of the buried heat pipe 4, and the liquid outlet pipe 402 of the buried heat pipe 4 is connected to the liquid inlet side of the water-cooled partition 303, forming a closed coolant circulation loop. With this configuration, the coolant after absorbing heat will sequentially undergo two stages of heat dissipation: air cooling by the auxiliary radiator 6 and ground conduction by the buried heat pipe 4, before flowing back to the water-cooled partition 303, forming a complete closed-loop cooling cycle with a clear heat dissipation path and high cooling efficiency.

[0044] As an optional implementation, the buried heat dissipation pipe 4 includes a reciprocating pipe body 401, an outlet pipe 402, and an inlet pipe 403. The reciprocating pipe body 401 is pre-buried in the stratum in a serpentine reciprocating arrangement to increase the contact heat exchange area with the stratum. The inlet pipe 403 and the outlet pipe 402 are respectively connected to the two ends of the reciprocating pipe body 401 to realize the inflow and outflow of coolant. With this arrangement, the serpentine reciprocating pipe body greatly extends the flow path and heat exchange time of coolant in the stratum, making full use of the stratum's heat storage capacity to achieve efficient passive heat dissipation.

[0045] As an optional implementation, the dual-shaft motor 7 includes a motor body 701, a motor shaft 702, a transmission bolt 703, and a motor base 704. The motor body 701 is fixed to the top side of the base plate 1 by the motor base 704. The motor shaft 702 extends from both ends of the motor body 701. The two ends of the motor shaft 702 are respectively connected to the fan blade shaft of the air box 5 and the impeller shaft of the water pump 8 by the transmission bolt 703, so as to realize the synchronous drive of the air box 5 and the water pump 8. With this configuration, a single dual-shaft motor 7 can drive both the air-cooled and water-cooled systems at the same time. The structure is compact, and the output speed at both ends is strictly consistent, ensuring the flow matching of air cooling and water cooling and avoiding the speed imbalance problem caused by independent drive.

[0046] As an optional implementation, the air box 5 includes an air collection shroud 501 and an air inlet mesh shroud 502. The air collection shroud 501 is located on the air outlet side of the air box 5 and is used to collect airflow and guide it to the auxiliary heat sink 6. The air inlet mesh shroud 502 is located on the air inlet side of the air box 5 and is used to filter the air entering the air box 5 and prevent foreign objects from being sucked in. With this configuration, the air collection shroud 501 concentrates the dispersed airflow generated by the fan and guides it to the heat dissipation fins 601 area of ​​the auxiliary heat sink 6, thereby improving the effective utilization rate of air cooling. The air inlet mesh shroud 502 blocks external dust and debris from entering the interior of the air box 5, ensuring a clean operating environment for the fan and the active cooling component 9.

[0047] As an optional implementation, the auxiliary radiator 6 includes heat dissipation fins 601, an inlet cover 602, and an outlet cover 603. The heat dissipation fins 601 are disposed between the inlet cover 602 and the outlet cover 603 to increase the heat exchange area between the coolant and the airflow. An inlet connector 602a is provided on the outside of the inlet cover 602 for connecting to the pump outlet pipe 802 of the water pump 8. An outlet connector 603a is provided on the outside of the outlet cover 603 for connecting to the inlet pipe 403 of the buried heat pipe 4. With this configuration, the heat dissipation fins 601 significantly expand the heat exchange area between the coolant and the external airflow. The inlet connector 602a and the outlet connector 603a facilitate the quick connection and sealing of the pipeline, ensuring the assembly efficiency and sealing reliability of the circulation loop.

[0048] As an optional implementation, the active heat dissipation assembly 9 includes a transmission cover 901, a motor mounting cylinder 902, and a fine-tuning motor 903. The transmission cover 901 is fixed to the end of the motor shaft 702 of the dual-axis motor 7 by transmission bolts 703. A sliding groove 901a is provided on the inner wall of the transmission cover 901, and a screw rotating seat 901b is provided at the end of the transmission cover 901. The motor mounting cylinder 902 is fixed in the center of the transmission cover 901, and the fine-tuning motor 903 is installed in the motor mounting cylinder 902. The fine-tuning motor 903 is powered by a conductive slip ring on the motor shaft 702 (not shown in the figure). A synchronous gear ring 903a is fixed at the output end of the fine-tuning motor 903. With this configuration, the transmission cover 901 provides a space for the extension and retraction of the fan blades and the screw drive, and the motor mounting cylinder 902 positions the fine-tuning motor 903 at the center of the transmission cover 901. The synchronous gear ring 903a acts as a power output element and meshes with the peripheral gear 904a to realize the synchronous operation of multiple sets of screws driven by a single motor.

[0049] As an optional implementation, a plurality of transmission screws 904 are arranged circumferentially inside the transmission cover 901. Each transmission screw 904 has a gear 904a at one end that meshes with a synchronous gear ring 903a. A sliding fan blade 905 is fitted onto the transmission screw 904. A nut seat 905a is provided on the inner side of the sliding fan blade 905, threadedly engaging with the transmission screw 904. The sliding fan blade 905 is embedded in a sliding groove 901a. A fine-tuning motor 903 drives the synchronous gear ring 903a to rotate, thereby rotating the transmission screws 904 through the meshing of the synchronous gear ring 903a and the gear 904a. The transmission screws 904 and the nut seat 904a... The threaded engagement of 5a drives the sliding fan blade 905 to slide out along the slide groove 901a, which is used to change the effective working area of ​​the sliding fan blade 905 to adjust the air-cooling pump power. With this configuration, the synchronous rotation of multiple transmission screws 904 is achieved through the meshing transmission of the synchronous gear ring 903a and multiple sets of gears 904a, thereby driving multiple sets of sliding fan blades 905 to extend and retract synchronously along the slide groove 901a. The extension of each fan blade is consistent, and the air output is uniform. The effective working area is adjusted by changing the radial extension length of the fan blade. The adjustment method is novel and the adjustment range is wide. It can achieve fine adjustment of air-cooling power without changing the speed of the dual-shaft motor 7.

[0050] Using the above structure, the operating steps are as follows: The base plate 1 is horizontally fixed to the installation ground. The reciprocating pipe body 401 of the buried heat dissipation pipe 4 is arranged in a serpentine pattern and pre-embedded in the stratum below the base plate 1. The liquid inlet pipe 403 and liquid outlet pipe 402 of the buried heat dissipation pipe 4 pass upward through the pipe hole 203a on the side plate 203 of the base plate 1 and the overhead base 2, and a connection interface is reserved.

[0051] The base plate 201 of the overhead base 2 is fixed to the top side of the ground plate 1. The end plate 202 and the side plate 203 are installed together to form a support frame. The reinforcing ribs 204 on the outside of the side plate 203 enhance the structural strength of the frame. The substation body 3 is hoisted and placed above the overhead base 2, so that a ventilation gap is formed between the bottom of the substation body 3 and the ground plate 1 to improve the air circulation at the bottom.

[0052] The dual-shaft motor 7 is fixed to the top side of the base plate 1 via the motor base 704. The motor shaft 702 at one end of the dual-shaft motor 7 is connected to the fan blade shaft of the wind box 5 via the transmission bolt 703, and the motor shaft 702 at the other end is connected to the impeller shaft of the water pump 8 via the transmission bolt 703, thus completing the assembly of the power components.

[0053] The air collection cover 501 of the air box 5 is aligned with the auxiliary radiator 6 and installed. The air inlet screen 502 is installed on the air inlet side of the air box 5. The liquid inlet cover 602 of the auxiliary radiator 6 is connected to the pump outlet pipe 802 of the water pump 8 through the liquid inlet connector 602a. The liquid outlet cover 603 is connected to the liquid inlet pipe 403 of the buried heat dissipation pipe 4 through the liquid outlet connector 603a. The pump inlet pipe 801 of the water pump 8 is connected to the liquid outlet side of the water-cooled partition 303 of the substation body 3. The liquid outlet pipe 402 of the buried heat dissipation pipe 4 is connected to the liquid inlet side of the water-cooled partition 303, forming a closed coolant circulation loop.

[0054] The active cooling component 9 is installed inside the air box 5. The transmission cover 901 is fixed in the cavity of the air box 5. The motor mounting cylinder 902 is fixed in the center of the transmission cover 901. The fine-tuning motor 903 is installed in the motor mounting cylinder 902. The synchronous gear ring 903a is fixed to the output end of the fine-tuning motor 903. Several transmission screws 904 are arranged circumferentially in the transmission cover 901 and positioned by the screw rotating seat 901b. The gear 904a at the end of each transmission screw 904 meshes with the synchronous gear ring 903a. The sliding fan blade 905 is threaded with the transmission screw 904 through the nut seat 905a and is embedded in the sliding groove 901a on the inner wall of the transmission cover 901.

[0055] During normal operation, the dual-axis motor 7 synchronously drives the air box 5 and the water pump 8. The water pump 8 drives the coolant to circulate between the water-cooled partition 303, the auxiliary radiator 6, and the buried heat pipe 4. After absorbing the heat inside the substation body 3, the coolant is cooled by the auxiliary radiator 6 and then conducted to the ground by the buried heat pipe 4, thus achieving a combination of passive heat dissipation and air cooling. The airflow pumped by the air box 5 passes through the heat dissipation fins 601 of the auxiliary radiator 6 and then enters the interior of the enclosure through the diffuser holes 304 on the side wall of the substation body 3, enhancing the internal air circulation.

[0056] When the internal temperature of the substation rises and the heat dissipation demand increases, the fine-tuning motor 903 starts and drives the synchronous gear ring 903a to rotate. Through the meshing of the synchronous gear ring 903a with several gears 904a, several transmission screws 904 rotate synchronously. The threaded engagement between the transmission screws 904 and the nut seat 905a drives several sets of sliding fan blades 905 to slide out synchronously along the slide groove 901a, increasing the length of the sliding fan blades 905 extending out of the transmission cover 901, thereby increasing the effective working area of ​​the fan blades, improving the air-cooled pump's air delivery force, and enhancing the heat dissipation capacity. When the internal temperature decreases and the heat dissipation demand decreases, the fine-tuning motor 903 rotates in the opposite direction, driving the sliding fan blades 905 to retract along the slide groove 901a, reducing the effective working area of ​​the fan blades, reducing the air-cooling power, and achieving adaptive adjustment of the heat dissipation load.

[0057] By pre-burying underground heat dissipation pipes 4 under the base plate 1, the heat carried by the coolant is conducted to the ground layer to achieve passive heat dissipation by taking advantage of the natural characteristics of the underground stratum having a relatively constant temperature and strong heat storage capacity. This significantly reduces heat dissipation energy consumption. At the same time, it is combined with the air cooling of the auxiliary radiator 6 to form a composite heat dissipation mode that combines air cooling and underground heat conduction, which significantly improves the heat dissipation protection capability of the prefabricated substation in high-temperature environments.

[0058] The dual-axis motor 7 synchronously drives the fan box 5 and the water pump 8, so that the fan speed and the water pump speed are naturally matched. This changes the problem of independent drive of the fan and water pump in the traditional solution and the speed cannot be matched. It realizes the linkage and coordination of air cooling flow and water cooling circulation flow, avoids overload or inefficient operation of a single system, improves the overall heat dissipation efficiency and reduces energy consumption.

[0059] The active cooling component 9 drives the synchronous gear ring 903a to rotate via the fine-tuning motor 903. The meshing of the synchronous gear ring 903a and the gear 904a drives multiple transmission screws 904 to rotate synchronously. Through the threaded engagement of the screws and the nut seat 905a, multiple sets of sliding fan blades 905 are driven to extend and retract synchronously along the slide groove 901a, changing the effective working area of ​​the fan blades. Thus, the air-cooled pumping power can be finely adjusted without changing the motor speed. It has a wide adjustment range and fast response speed. It can adaptively match the heat dissipation output according to the internal temperature and load of the substation, taking into account both heat dissipation effect and energy saving requirements.

[0060] The substation body 3 is raised by the overhead base 2, so that a ventilation gap is formed between the bottom of the substation body 3 and the ground plate 1, which improves the air circulation conditions at the bottom, avoids the problem of poor heat dissipation and water accumulation caused by the bottom of the box directly touching the ground, and improves the operating safety of the equipment in humid and rainy environments.

[0061] The water-cooled partition 303 is located inside the substation body 3 and absorbs the heat generated by the internal components. The airflow pumped by the air box 5 enters the box through the side wall diffusion hole 304 after passing through the auxiliary radiator 6, forming a dual heat dissipation path of water-cooled heat absorption and air-cooled convection. The heat dissipation is uniform, effectively reducing the overall temperature rise inside the box and ensuring the safe operation of electrical equipment.

[0062] The buried heat dissipation pipe 4 adopts a serpentine reciprocating pipe body 401 structure to increase the contact heat exchange area with the ground and improve the ground heat conduction efficiency; the auxiliary radiator 6 is equipped with heat dissipation fins 601 to increase the heat exchange area, and together with the air box 5 for centralized air supply, the heat dissipation efficiency is high; the overall structure has a high degree of integration, and the functional modules are arranged compactly, which is convenient for installation and maintenance, and is suitable for the safety protection of box-type substations under complex working conditions such as outdoor, high temperature, and high humidity.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A safety protection device for a prefabricated substation, characterized in that, include: The base plate (1) forms the overall installation foundation; The overhead base (2) and the substation body (3) are provided. The overhead base (2) is set above the ground substrate (1) to support the substation body (3). The substation body (3) is set above the overhead base (2). The substation body (3) is provided with a water-cooled partition (303) inside to accommodate the coolant and absorb the internal working heat. The underground heat dissipation pipe (4) is pre-embedded in the stratum below the ground substrate (1) to conduct the heat carried by the coolant to the stratum. A dual-axis motor (7) is fixed to the top side of the base plate (1). The two ends of the dual-axis motor (7) are respectively connected to a wind box (5) and a water pump (8) to drive the air cooling and water cooling circulation synchronously. The wind box (5) is connected to one end of the dual-axis motor (7). The outer side of the wind box (5) corresponds to the auxiliary radiator (6) to pump cooling airflow to the auxiliary radiator (6). The auxiliary radiator (6) is located on the outer side of the wind box (5). The auxiliary radiator (6) is provided with an inlet cover (602) and an outlet cover (603) to cool the flowing coolant. The water pump (8) is connected to the other end of the dual-shaft motor (7). The pump inlet pipe (801) of the water pump (8) is connected to the liquid outlet side of the water-cooled partition (303). The pump outlet pipe (802) of the water pump (8) is connected to the liquid inlet cover (602) and is used to pump the heat-absorbing coolant into the auxiliary radiator (6).

2. The safety protection device for the prefabricated substation according to claim 1, characterized in that, The overhead base (2) includes a base plate (201), an end plate (202) and a side plate (203). The base plate (201) is fixed to the top side of the ground base plate (1). The end plate (202) and the side plate (203) form a support frame. The side plate (203) has a through hole (203a) for the underground heat dissipation pipe (4) to pass through. The side plate (203) has a reinforcing rib (204) on the outside to enhance the structural strength of the overhead base (2).

3. The safety protection device for the prefabricated substation according to claim 1, characterized in that, The substation body (3) includes a corner wall panel (301), a top plate (302) and a side door panel (305). The corner wall panel (301) forms the side wall of the box, the top plate (302) covers the top of the box, the water-cooled partition (303) is set inside the box, the corner wall panel (301) is provided with a diffusion hole (304) for diffusing the airflow pumped by the air box (5) into the box, and the side door panel (305) is provided with an observation port (305a) for observing the internal operating status of the box.

4. The safety protection device for the prefabricated substation according to claim 1, characterized in that, The pump inlet pipe (801) of the water pump (8) is connected to the liquid outlet side of the water-cooled partition (303), the pump outlet pipe (802) is connected to the liquid inlet cover (602) of the auxiliary radiator (6), the liquid outlet cover (603) of the auxiliary radiator (6) is connected to the liquid inlet pipe (403) of the buried heat pipe (4), and the liquid outlet pipe (402) of the buried heat pipe (4) is connected to the liquid inlet side of the water-cooled partition (303), thus forming a closed coolant circulation loop.

5. The safety protection device for a prefabricated substation according to claim 4, characterized in that, The buried heat dissipation pipe (4) includes a reciprocating pipe body (401), an outlet pipe (402), and an inlet pipe (403). The reciprocating pipe body (401) is arranged in a serpentine pattern and pre-buried in the stratum to increase the heat exchange area with the stratum. The inlet pipe (403) and the outlet pipe (402) are respectively connected to the two ends of the reciprocating pipe body (401) to realize the inflow and outflow of coolant.

6. The safety protection device for a prefabricated substation according to claim 1, characterized in that, The dual-axis motor (7) includes a motor body (701), a motor shaft (702), a transmission bolt (703), and a motor base (704). The motor body (701) is fixed to the top side of the base plate (1) through the motor base (704). The motor shaft (702) extends from both ends of the motor body (701). The two motor shafts (702) are respectively connected to the fan blade shaft of the wind box (5) and the impeller shaft of the water pump (8) through the transmission bolt (703), so as to realize the synchronous drive of the wind box (5) and the water pump (8).

7. The safety protection device for a prefabricated substation according to claim 1, characterized in that, The air box (5) includes an air collection hood (501) and an air inlet screen (502). The air collection hood (501) is located on the air outlet side of the air box (5) and is used to collect airflow and guide it to the auxiliary radiator (6). The air inlet screen (502) is located on the air inlet side of the air box (5) and is used to filter the air entering the air box (5) and prevent foreign objects from being sucked in.

8. The safety protection device for a prefabricated substation according to claim 7, characterized in that, The auxiliary radiator (6) includes heat dissipation fins (601), a liquid inlet cover (602) and a liquid outlet cover (603). The heat dissipation fins (601) are disposed between the liquid inlet cover (602) and the liquid outlet cover (603) to increase the heat exchange area between the coolant and the airflow. The liquid inlet cover (602) is provided with a liquid inlet connector (602a) on the outside for connecting to the pump outlet pipe (802) of the water pump (8). The liquid outlet cover (603) is provided with a liquid outlet connector (603a) on the outside for connecting to the liquid inlet pipe (403) of the buried heat dissipation pipe (4).

9. The safety protection device for a prefabricated substation according to claim 1, characterized in that, It also includes an active heat dissipation component (9), which is set inside the air box (5) and is used to adjust the air-cooled pump power to match the heat dissipation load. The active heat dissipation component (9) includes a transmission cover (901), a motor mounting cylinder (902) and a fine-tuning motor (903). The inner wall of the transmission cover (901) is provided with a sliding groove (901a). The end of the transmission cover (901) is provided with a screw rotating seat (901b). The motor mounting cylinder (902) is fixed in the center of the transmission cover (901). The fine-tuning motor (903) is installed in the motor mounting cylinder (902). The output end of the fine-tuning motor (903) is fixed with a synchronous gear ring (903a).

10. The safety protection device for a prefabricated substation according to claim 9, characterized in that, Several transmission screws (904) are arranged circumferentially inside the transmission cover (901). Each transmission screw (904) has a gear (904a) at one end that meshes with a synchronous gear ring (903a). A sliding fan blade (905) is fitted on the transmission screw (904). A nut seat (905a) with a threaded engagement with the transmission screw (904) is provided on the inner side of the sliding fan blade (905). The sliding fan blade (905) is embedded in a sliding groove. (901a) Inside; the fine-tuning motor (903) drives the synchronous gear ring (903a) to rotate, and through the meshing of the synchronous gear ring (903a) and the gear (904a), it drives the transmission screw (904) to rotate. The threaded engagement between the transmission screw (904) and the nut seat (905a) drives the sliding fan blade (905) to slide out along the slide groove (901a), which is used to change the effective working area of ​​the sliding fan blade (905) to adjust the air-cooled pumping power.

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