1251 results about "Expansion tank" patented technology

The invention discloses a hydropower station expansion tank water level prediction alarm method and system, belongs to the technical field of hydropower station automatic control, and aims to solve the technical problems of limited monitoring points, high false alarm rate, response delay and the like of a traditional hydropower station expansion tank water level alarm system. According to the invention, the multi-mode sensing network is constructed, and data of the pressure sensor array, the radar level meter and the float switch group are fused, so that space continuous monitoring is realized; a three-level sensing architecture is adopted, heterogeneous data is subjected to normalization processing, and dimensional differences are eliminated; the LSTM network is used for liquid level prediction, and a self-adaptive window adjustment mechanism is combined, so that the prediction flexibility and accuracy are improved; a DQN algorithm is adopted to optimize a control strategy, fine adjustment of the liquid level is achieved by adjusting the opening degree of the valve, the accuracy, timeliness and intelligent level of water level monitoring and alarming of the expansion water tank of the hydropower station are remarkably improved, the stability of the liquid level of the water tank is ensured, the system operation efficiency is optimized, the manual intervention requirement is reduced, and safety is improved.

The invention provides an integrated containment pressure suppression, filtration and discharge system. The integrated containment pressure suppression, filtration and discharge system comprises a containment, a discharge valve, a discharge pipeline, a spray pipe, a first-stage pressure suppression water tank, a second-stage pressure suppression water tank, a baffle plate steam-water separator, an expansion tank, a rupture disk structure, a combined metal fiber filter layer, a radioactivity monitor, a first stop valve and a second stop valve. The two-stage pressure suppression water tank is arranged, the high removal efficiency of airborne radioactive substances is achieved through two-stage bubbling water washing, then the combined metal fiber filter is arranged by means of an existing cabin, and the requirements for rapid pressure reduction and radioactive substance removal of the containment under the LOCA accident working condition can be met; meanwhile, the problem that the containment filtering and discharging system of the existing nuclear power station occupies too many resources is solved, and the economical efficiency is high.

The invention relates to the field of blast furnace pulverized coal preheating. A blast furnace pulverized coal preheating system comprises a coal injection workshop, a nitrogen heater, a common pulverized coal heater, a compressed nitrogen tank, a blast furnace, an oil storage tank, an expansion tank, a waste heat exchanger, a heat conduction oil pump, a PLC control system and a sound-light alarm device. Pulverized coal discharged from a coal injection workshop is heated in a common pulverized coal heater through waste heat of a blast furnace, and the heated pulverized coal enters the blast furnace to be combusted. The combustion characteristic of the preheated pulverized coal is remarkably improved, and the pulverized coal can be quickly combusted after entering a main combustion chamber of the blast furnace, so that the conventional three-section combustion process of heating, ignition and combustion is broken through.

The invention relates to the technical field of energy conservation and new energy, and discloses an electric vehicle integrated heat management system which comprises a refrigerant loop and a cooling liquid loop. The refrigerant loop and the cooling liquid loop realize heat interaction through the plate heat exchanger; a compressor, an eight-way valve, an in-cabin heat exchanger, a gas-liquid separator, a first heating assembly, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a battery direct cooling plate and a first external heat exchanger are arranged on the refrigerant loop; a radiator, a three-way water valve, an electric driving system, a motor water pump, an expansion water tank, a second external heat exchanger and a second heating assembly are arranged on the cooling liquid loop. The problems that a battery electric vehicle thermal management system is numerous in component, complex in loop and high in failure rate are solved.

The invention provides a new energy automobile battery temperature control system which comprises a battery pack, a battery pack, a liquid cooling pipeline, a backflow pipeline, an expansion water tank, a first circulating pump, a heat exchange body, a second circulating pump, a heat pump system, a resistance heater and a PTC heater. The battery pack is arranged in an inner cavity of the battery pack, the liquid cooling pipeline and the backflow pipeline are both located in the inner cavity of the battery pack and surround the battery pack, and a temperature sensor is arranged in the inner cavity of the battery pack; the liquid cooling pipeline and the backflow pipeline are provided with a plurality of branches, and each branch is provided with a temperature sensor. A three-way valve is arranged at one end of the liquid cooling pipeline and one end of the backflow pipeline; the liquid cooling pipeline is connected with the first circulating pump and penetrates through the heat exchange body to form a circulating loop with the expansion water tank, the heat exchange body is connected with the second circulating pump, the other end of the backflow pipeline is connected with the heat pump system, the other end of the heat pump system is connected with the PTC heater, and one end of the first circulating pump is connected with the resistance heater.

A cooling system, comprising: - a first cooling circuit (10), the first cooling circuit having a first coolant pump (12); - a second cooling circuit (20), the second cooling circuit having a second coolant pump (22); - an expansion tank (30), the expansion tank being provided with an expansion chamber (31) for accumulating coolant, wherein the expansion chamber is connected to the second cooling circuit (20) so as to allow the expansion chamber to receive coolant from the second cooling circuit; and - a degassing device (40), the degassing device being arranged in the first cooling circuit for separating bubbles from the coolant circulating therein. The degassing device (40) is located at a position lower than the expansion tank (30) and is connected to the expansion chamber (31) via a static pipeline (5) so as to allow the bubbles separated from the coolant in the degassing device to migrate upward in the static pipeline towards the expansion chamber.

The invention discloses a liquid cooling heat exchange unit and a control method. Circulating power is provided for a system working medium through a main circulating pump; a heat exchange channel is provided for a system working medium through the plate heat exchanger; the pressure of a system working medium is balanced through the pressure stabilizing module; the pressure of a system working medium is maintained through the liquid supplementing module; impurities of a system working medium are filtered through a filter; and the valve control system is adjusted to exhaust gas and control the flow of a system working medium. The structure and the connecting mode of the pressure stabilizing module are improved, liquid in the expansion tank can circulate through the pressure difference between the two ends of the bypass pipe, the situation that only liquid near the inlet and outlet ends of a pipeline flows in the working process of the expansion tank is avoided, dead water is prevented, meanwhile, the liquid supplementing module is optimally designed, and the energy consumption is reduced. The liquid supplementing tank can empty liquid in the tank while automatic liquid supplementing is achieved, dead water in the system is further prevented, and the plate heat exchanger can be widely applied to the technical field of plate heat exchangers.

The invention belongs to the technical field of coking high-temperature condensed water recycling, and discloses a high-temperature condensed water recycling device which comprises an expansion tank with a condensed water ingress pipe welded to the inner wall of one side of the bottom, and a first liquid discharge pipe welded to the bottom of the inner wall of one side of the expansion tank. A negative pressure exhaust pipe is welded to the position, over the first liquid drainage pipe, of the expansion tank, a blow-off pipe is welded to the axis of the bottom of the expansion tank, and a blow-off assembly is arranged on the inner wall of the bottom of the expansion tank. The flowing low-temperature gaseous working medium and the high-temperature condensed water are used for heat exchange treatment, the temperature of the high-temperature condensed water can be effectively reduced, the cooled high-temperature condensed water is sent to downstream users to achieve heat recycling, and the heated gaseous working medium can drive the generator to rotate to achieve power generation treatment; and in addition, the high-temperature liquid working medium recycled in the middle process can be used for heat exchange, so that the heat of the high-temperature condensed water can be fully recycled.

The invention discloses a thermal management control system for a small-displacement engine, belongs to the technical field of thermal management of engines, and solves the technical problem of overheating during operation of the existing small-displacement engine. The system comprises a cylinder body, a cylinder cover, a temperature control module, an air cooling radiator, a water pump, a preheater, an expansion water tank, an exhaust pipe water jacket, a control module, a radiator, a thermostat, an oil tank, a first control valve, a second control valve and a third control valve, a water heat exchanger is arranged in the oil tank, the cylinder body is provided with a first temperature sensor, and the cylinder cover is provided with a second temperature sensor. The thermostat is provided with a third temperature sensor, the oil tank is provided with a fourth temperature sensor, and the control module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor. The oil supply temperature management mode and the engine body temperature management mode are determined through the cylinder body temperature, the cylinder cover temperature, the cooling water temperature and the fuel oil temperature, so that the engine body of the small-displacement engine is prevented from being overheated, and the performance of the small-displacement engine is improved.

The invention relates to the field of liquid level monitoring, in particular to a liquid level monitoring method and system for an expansion water tank. The method comprises the following steps: acquiring an acceleration sequence of the expansion tank and liquid level sequences at different preset positions, obtaining a center frequency of a target sequence, and constructing a center frequency sequence of all the liquid level sequences; a target window sequence is obtained, the liquid level change rate at any sampling moment is calculated, a change rate sequence is constructed, and the confidence weight is calculated according to the change rate sequence and the acceleration sequence; calculating a fusion liquid level value of the target window sequence; traversing different center frequencies to obtain a plurality of fusion liquid level values corresponding to any liquid level sequence, and taking a mean value of all the fusion liquid level values as a marked liquid level value of any liquid level sequence; and monitoring the liquid level of the expansion water tank according to the obtained comprehensive liquid level value. According to the technical scheme, the precision of the liquid level monitoring result can be improved.

The invention relates to the technical field of heat management, in particular to a heat pump-based whole-vehicle heat management integrated system for a pure electric vehicle and a control method, which comprises a cooling liquid loop, a water pump I, a heater, an expansion water tank I, a motor, an electric controller, a refrigerant loop I, a refrigerant loop II, an electronic expansion valve III, a liquid cooling plate, a battery pack and an electromagnetic valve IV, two parts are integrated and optimized into one part, the number of parts is effectively reduced, the production and manufacturing cost of the whole vehicle is greatly reduced, the weight of the vehicle body is reduced, the internal space of a cabin is saved, meanwhile, a thermal system of the whole vehicle is integrated, energy is absorbed from the environment and waste heat, and the endurance mileage can be greatly increased; therefore, the problem that an existing new energy commercial vehicle heat management system occupies a large space is solved.

The invention belongs to the technical field of water cooling systems of high-voltage frequency converters, and particularly relates to a full water cooling system of a high-voltage frequency converter. A flow regulating valve A is installed on an outlet pipeline of the power unit, a flow regulating valve B is installed on an outlet pipeline of the water-cooled transformer, an outlet loop of the flow regulating valve A is provided with a pressure transmitter A, a flow transmitter A and a temperature element A, and an outlet loop of the flow regulating valve B is provided with a pressure transmitter B, a flow transmitter B and a temperature element B; an inlet pipeline of the expansion water tank is connected with water catchment main pipes of the flow adjusting valve A and the flow adjusting valve B, a water tank heater is installed in the expansion water tank, the upper portion of the expansion water tank is connected with the first nitrogen expansion tank and the second nitrogen expansion tank, and an outlet pipeline of the expansion water tank is connected with inlet water catchment pipelines of the first circulating pump and the second circulating pump. The reliability and the stability of water-cooling operation of the high-voltage frequency converter are fundamentally and integrally improved.

The invention relates to the technical field of heat management, in particular to a pure electric commercial vehicle integrated heat management system based on an indirect heat pump, which comprises an expansion water tank I, a waste heat loop, a refrigerant loop, a battery pack and a cooling liquid loop, a first expansion water tank, a waste heat loop, a refrigerant loop, a battery pack and a cooling liquid loop are adopted, and when the heating environment temperature is low in winter, a direct type heat pump compressor may not be started. Heat is transmitted through the cooling liquid, heat exchange with the battery pack can be achieved, heat exchange with air in a cab can also be achieved, and control and distribution of the heat can be well achieved. The indirect heat pump can more fully utilize an environmental heat source, more effectively save energy and reduce the operation cost. Therefore, the problem that a traditional heat pump system is difficult to start in winter is solved.

The invention belongs to the technical field of oil conservator liquid level monitoring, and discloses a transformer oil conservator oil level digital online monitoring device which comprises an oil conservator and a control circuit, the top and the bottom of the oil conservator are fixedly communicated with a first pipeline and a second pipeline respectively, a dehumidifier is arranged at the top of the first pipeline, and the transformer oil conservator oil level digital online monitoring device further comprises a monitoring assembly arranged in the oil conservator; and the damping assembly is mounted on the monitoring assembly. According to the scheme, the floating block changes along with the change of the oil level in the oil conservator, and at the moment, the floating block drives the rotating shaft to rotate through the connecting rod, so that the contact position of the sliding sheet and the concave surface of the arc-shaped resistor changes; at the moment, the current passing through the arc-shaped resistor at the position of the sliding piece changes along with the change of the contact position of the sliding piece and the concave surface of the arc-shaped resistor, then the control circuit converts a current signal into the height of the liquid level in the oil conservator and transmits data to a monitoring terminal, and therefore the safety and accuracy of the device for monitoring the oil level of the oil conservator are improved.

An isolation mounting arm for use with an expansion tank has a passageway with a first end portion, a second end portion, and a medial portion located between the first end portion and the second end portion with the drain port located at the terminal end of the second end portion. A first tee is located in the first end portion with oppositely disposed first and second ports. A second tee is located in the second end portion, with oppositely disposed fourth and fifth ports. A first valve member is coupled to the first port, a second valve member is coupled to the second port, and a third valve member is located adjacent to the drain port. An expansion tank is coupled to either the fourth port or the fifth port with a plug coupled to the other port.

The invention discloses an automatic cooling circulation system and method for a high-voltage direct-current circuit breaker, and the system comprises a machine body water jacket nested at the outer side of the circuit breaker, takes away the heat generated by the circuit breaker through the circulating flow of a cooling liquid, provides cooling liquid circulation power through a water pump, and increases the heat dissipation area of the cooling liquid through a heat dissipation net. Heat exchange between cooling liquid and air is conducted, a fan is used for blowing air to a heat dissipation net, heat dissipation is accelerated, meanwhile, electric arcs of a circuit breaker are lengthened through blowing, impedance of the circuit breaker is increased, the system is connected into a diaphragm type expansion tank and a water tank, and the pressure in a cooling circulation system pipeline is adjusted. The system is high in automation operation degree, the fan and the water pump can be prevented from being in a high-power working state under the condition that the temperature is not high, the service life of equipment is prolonged, meanwhile, the system can meet the requirements of different temperature working conditions, and the application range is wide.

To provide a pump unit device which can properly attach an expansion tank to a pedestal.SOLUTION: In a pump unit A, first and second object parts 43A, 43B for attaching an expansion tank 2 to a pedestal 4 to which a pump unit 1 in which a pump P is arranged in a casing 10 is attached, a bracket 5 for the expansion tank 2 comprises a support part 5C for supporting the expansion tank 2, and first and second extension parts 5A, 5B having first and second attachment parts Aa, Ab protruding in a horizontal direction from the support part 5C and attached to the first and second attachment object parts 43A. 43B, and at least either of the first and second extension parts 5A, 5B is constituted by connecting a plurality of members, and set so as to be changeable in a total length dimension by changing connecting points of the plurality of members.SELECTED DRAWING: Figure 1

The utility model discloses a power battery heat management unit assembly which comprises a shell, a circulating water pump, a heat exchanger, a compressor, a condenser core body and a liquid storage drying filter are installed in the shell, an expansion water tank is further fixed outside the shell, and a circulating water inlet pipeline and a circulating water outlet pipeline are fixed in the shell. A water inlet connecting port of the circulating water inlet pipeline and a water outlet connecting port of the circulating water outlet pipeline are fixed on the shell and are exposed; an outlet of the circulating water pump is communicated with one end of a water flowing channel of the heat exchanger, and the other end of the water flowing channel is communicated with the circulating water outlet pipeline; the circulating water inlet pipeline is provided with a water supplementing opening, and the water outlet of the expansion water tank is communicated with the water supplementing opening through a pipeline. The unit assembly can simplify the work of assembly connection, and is simpler and more convenient to install.

The utility model discloses a suspension type expansion water tank for a heavy truck type, which comprises a cab welding assembly, a cooling module and an expansion water tank assembly, and the expansion water tank assembly is mounted at the bottom of the cab welding assembly and positioned above the cooling module; the expansion water tank assembly comprises an expansion water tank body, the bottom of the expansion water tank body is connected with a degassing pipeline and a water supplementing pipeline, the other end of the water supplementing pipeline is connected to a water inlet of the water pump, an expansion water tank pressure cover is installed on the upper right portion of the expansion water tank body, and an expansion water tank cover is installed on the front left portion of the expansion water tank body. A liquid level alarm sensor is installed on the left side of the bottom of the expansion water tank body. According to the suspension type expansion water tank for the heavy truck type, the expansion water tank is applied to a heavy truck cooling system, and the problems that an expansion water tank is large in occupied space, and a water supplementing pipeline and a degassing pipeline are long are solved; interference with surrounding parts is avoided, reliability of products is improved, and attractiveness is greatly improved.

The invention discloses a process method and device for improving heat stability through gas pressurization of an organic heat carrier heat supply system, and relates to the technical field of heat conduction oil systems, the device comprises an expansion tank, the bottom end of the expansion tank is fixedly connected with a heat conduction oil pipeline, a mounting frame is arranged on one side of the expansion tank, and the device further comprises a nitrogen tank, a gas inlet mechanism and an exhaust mechanism. By arranging the air inlet mechanism, the hydraulic cylinder operates to drive the partition plate to move, and the partition plate moves downwards to reduce the space in the expansion tank, so that the air pressure in the expansion tank is increased, and the condition of negative pressure is avoided; meanwhile, when the partition plate moves downwards, the second air inlet pipe is automatically opened, nitrogen in the nitrogen tank can enter the expansion tank through the second air inlet pipe, and the air pressure in the expansion tank is increased in the mode that the space in the expansion tank is reduced through the displacement of the partition plate; and the speed of supplementing gas in the expansion tank is increased, so that the negative pressure working condition in the expansion tank is avoided.

A cooling system for an electric traction machine includes a looped conduit system for conducting a first cooling liquid and a circulation pump for conveying the first cooling liquid in a first circulation direction. The cooling system includes an expansion tank filled at least partially with the first cooling liquid and a gas, and a motor input terminal for fluidically connecting the looped conduit system on an input side to the electric traction machine. The cooling system includes a motor output terminal for fluidically connecting the looped conduit system on an output side to the electric traction machine and a first heat exchanger for dissipating heat from and / or supplying heat to the first cooling liquid. In the first circulation direction, the first heat exchanger is arranged downstream of the electric traction machine and connected via the motor input and output terminal and upstream of the expansion tank.

The invention provides an electrical system of an electric helicopter. The electrical system comprises an electric power system, an intelligent control system, a water cooling system and a low-voltage power distribution system, the electric power system comprises a power battery, a high-voltage box, a controller and a motor and provides a power supply for the whole helicopter, and the transmission system transmits the capacity to the rotor wings to provide lift force for the helicopter; the power battery water cooling system comprises a large water pump, a large water pump controller and a power battery heat exchanger; the motor water cooling system comprises a small water pump, a small water pump controller, a controller heat exchanger, an overflow water tank, an expansion water tank and a radiator. The intelligent control system is composed of a comprehensive management computer and a rotor rotating speed monitor, and the low-voltage power distribution system comprises a 24V storage battery and onboard low-voltage electric equipment; meanwhile, the invention provides an electric helicopter electrical system control method.

The invention relates to the technical field of automobile motor cooling, in particular to an automobile motor cooling device integrated with an intelligent temperature control system and a use method of the automobile motor cooling device. The automobile motor cooling device comprises a radiator, a fan, an expansion water tank, an electric water pump and a water pipe, the fan is installed on one side of the radiator, and the expansion water tank is connected to the upper end of one side of the radiator through the water pipe; the bottom end of one side of the radiator is connected with an electric water pump through a water pipe, the electric water pump is connected with a radiating channel in the driving motor through a water pipe, a temperature control mechanism is arranged outside the water pipe connected between the driving motor and the radiator, and an air conditioner low-pressure pipe is installed on the inner side of the upper end of the temperature control mechanism. According to the anti-freezing device, anti-freezing liquid flowing through the interior of the heat exchange pipe can be cooled through air conditioner cold air and an air conditioner low-pressure pipe in the automobile, the performance of the whole automobile for coping with the extreme environment is improved, when the external temperature is low, heat of the anti-freezing liquid flowing through the interior of the heat exchange pipe is utilized, a heating system of the electric automobile is assisted, and the anti-freezing effect is improved. And the energy loss of the electric automobile heating system is effectively reduced.

A vehicle cooling system includes a heat exchanger, upper and lower coolant hoses extending between the heat exchanger and a vehicle power system for carrying liquid coolant to and from the vehicle power system, and an expansion tank fluidly coupled to the lower coolant hose. The vehicle cooling system further includes an active coolant monitoring system that includes a coolant leak sensor that detects leakage of the liquid coolant from the vehicle cooling system and a coolant contamination sensor that detects contamination of the of liquid coolant. The vehicle cooling system further includes an electronically controllable coolant flow shutoff valve in series with the lower coolant hose adjacent a lower coolant outlet of the heat exchanger. The electronically controllable coolant flow shutoff valve is closed when the coolant pump is off and open when the coolant pump is on.

An expansion tank, a thermal management system, and a vehicle. An expansion tank (10) is for use in a vehicle, and the vehicle comprises a motor heat exchange circuit (20) and a battery heat exchange circuit (30). The expansion tank (10) comprises a tank body (100) and a flow channel assembly (200). The tank body (100) defines a fluid storage chamber (130) for storing a heat exchange fluid. The flow channel assembly (200) comprises a first flow channel portion (210) and a second flow channel portion (220). The first flow channel portion (210) and the second flow channel portion (220) jointly define a fluid replenishment passage (230) and a degassing passage (240). Both the fluid replenishment passage (230) and the degassing passage (240) are in communication with the fluid storage chamber (130), and both can communicate with the motor heat exchange circuit (20) and / or the battery heat exchange circuit (30). The first flow channel portion (210) and / or the second flow channel portion (220) is integrally connected to the tank body (100).

The utility model relates to an expansion tank assembly and a unit. The expansion tank assembly comprises an expansion tank, the expansion tank comprises a tank body and a connector part arranged at the bottom of the tank body, the tank body is provided with an inner cavity, an inlet and outlet flow channel is formed in the connector part, and the inlet and outlet flow channel communicates with the inner cavity; the valve assembly comprises a main body part, the main body part is provided with a first port, a second port and a third port, a first flow channel and a second flow channel communicated with the first flow channel are formed in the main body part, the first port and the second port are located at the two ends of the first flow channel, the third port is located at one end of the second flow channel, and the third port is connected with the connector part. The second flow channel is communicated with the inlet and outlet flow channel; the flow blocking component comprises a flow blocking plate and an installation blocking piece, the installation blocking piece is installed in the tank body and located in the inner cavity, one end of the flow blocking plate is fixedly connected with the installation blocking piece, the flow blocking plate penetrates through the second flow channel, and the other end of the flow blocking plate extends into the first flow channel. The expansion tank assembly can prevent liquid in the tank body from becoming dead water due to long-term non-flowing.

The utility model relates to the technical field of protection accessories, in particular to a protection structure and an expansion tank. The protective structure comprises a cover body and a protective cap; the cover body and the protective cap are integrally formed, or the cover body is provided with a mounting part, the mounting part is provided with a containing groove, at least part of the protective cap is located in the containing groove, the outer surface of the protective cap comprises an anti-rotation part, the groove wall of the containing groove comprises an anti-rotation matching part, and the anti-rotation matching part abuts against the anti-rotation part for limiting so as to limit rotation of the cover body relative to the protective cap; the protective cap is provided with internal threads used for being connected with external threads of the valve core. During installation, the cover body and the protective cap can be installed on the valve core together, and when disassembly is needed, the cover body and the protective cap can be screwed off from the valve core together in a rotating mode, so that the installation process is simplified, and the assembly efficiency is improved.

An activated carbon cartridge for an expansion tank for a battery cooling system is disclosed. The activated carbon cartridge includes a cartridge housing with a body and a cover. A base of the body and the cover (18) are structured to be air-permeable. Activated carbon is disposed in the cartridge housing. A seal is arranged on the base of the body for sealing against an intermediate wall of a container housing of the expansion container. A spring is supported on the lid.

The oil-immersed transformer comprises an oil tank, a relay and an oil conservator, hose connectors are fixedly installed on the oil conservator and the relay through connecting flanges respectively, positioning pipes are fixedly installed on the two hose connectors respectively, a metal hose is arranged between the two hose connectors, and the metal hose is connected with the relay. The two positioning pipes are sleeved with the two ends of the metal hose respectively, a locking assembly used for locking the metal hose is arranged on the hose connector, and a supporting assembly used for supporting the metal hose is arranged on the oil conservator. The transformer has the advantages that the expansion tank is connected with the relay through the metal hose, and the metal hose is used as a connecting medium, so that the anti-vibration performance of the joint between the expansion tank and the relay is improved, the oil leakage phenomenon caused by transportation shaking is effectively prevented, the oil leakage risk is greatly reduced, and the safety and reliability of the transformer are improved.

The utility model discloses a double-refrigeration storage heat preservation device which comprises a storage device, a refrigeration mechanism and a supporting and adjusting mechanism, and the height of the storage device and the height of the refrigeration mechanism can be integrally or locally adjusted through the supporting and adjusting mechanism. The refrigerating mechanism comprises a first refrigerating system, a second refrigerating system and an expansion tank; the first refrigerating system is arranged at the lower end of the second refrigerating system; the expansion tank is arranged at the upper end of the second refrigerating system; the first refrigerating system and the second refrigerating system can independently and alternately refrigerate or simultaneously refrigerate the storage equipment. The storage device has the advantages that the double refrigerating systems operate alternately, the refrigerating systems can be in a low-power-consumption state all the time, the interior of the storage device can be in low-temperature protection for a long time, and external heat can be effectively prevented from permeating into the storage device through the arrangement of the heat preservation layer and the double shells; meanwhile, a set of intermittent refrigerating system can be used for heat dissipation and cooling, so that the service life is prolonged, and faults of the refrigerating system are effectively prevented.