78results about How to "Increased operating life" patented technology

The invention relates to the field of service life prolonging control, and discloses a reinforcement learning-based self-adaptive service life prolonging control method for a wind turbine generator, which is used for providing a reliable technical means for prolonging the service life of the wind turbine generator. Comprising the steps of collecting a unit operation state and key component health parameters, and generating multi-dimensional state information; establishing a damage evolution model, predicting the residual life and generating a health degree index; designing a multi-objective optimization strategy, and solving to generate a cooperative control instruction; after the instruction is executed, the model and the strategy are dynamically updated based on unit state feedback, and a closed-loop control system is formed. The service life of the wind turbine generator is effectively prolonged.

This application provides a vertical heat recovery coke oven waste heat exchange unit, waste heat utilization system, and method, using supercritical carbon dioxide as the heat exchange medium. The unit includes a main compressor, a regenerator assembly, a high-pressure turbine, a low-pressure turbine, a precooler, and a heat exchanger. The heat exchanger internally houses a high-temperature superheater, a high-temperature reheater, a low-temperature superheater, a low-temperature reheater, an air-cooled wall, and an economizer. The main compressor outlet is connected to the cold-side inlet of the regenerator assembly, and the cold-side outlet of the regenerator assembly is connected to the working fluid inlet of the heat exchanger. The working fluid flows sequentially through the economizer, the air-cooled wall, the low-temperature superheater, and the high-temperature superheater before entering the inlet of the high-pressure turbine. The high-pressure turbine outlet is connected to the inlet of the low-temperature reheater, the low-temperature reheater outlet is connected to the inlet of the high-temperature reheater, and the high-temperature reheater outlet is connected to the inlet of the low-pressure turbine. The low-pressure turbine outlet is sequentially connected to the hot side of the regenerator assembly, the precooler, and the main compressor inlet.

The present application relates to the technical field of purification equipment, and particularly relates to a purification system for liquid lead-bismuth alloy coolant 210 The present application relates to the technical field of purification equipment, and particularly relates to a purification system for liquid lead-bismuth alloy coolant 210 Po and its compounds in the lead-bismuth alloy, and improves the operation safety of the lead-bismuth cooled reactor and the lead-bismuth experimental loop.

The utility model relates to a push star protection structure and a game machine. The star pushing protection structure comprises a base, a panel is arranged on one side of the base, and a mounting hole is formed in the middle of the panel; the driving module comprises a driving motor and a bearing frame, the driving motor and the bearing frame are both arranged on the base, and the driving motor is used for driving the bearing frame to move front and back; and the rotating module comprises a rotating motor and a mounting part, the rotating motor is arranged on the bearing frame, the output end of the rotating motor communicates with the mounting hole, the mounting part is arranged on the side, away from the rotating motor, of the output end of the rotating motor, and the mounting part is matched with the mounting hole. According to the scheme provided by the invention, when a user fails to play a game, the damage of components during movement matching can be avoided, and the service life of the game machine is prolonged.

A cable channel environment automatic adjusting device disclosed by the present invention comprises a monitoring module, a communication module, a CPU processor, a power supply module and a control module, an output end of the monitoring module is connected with the CPU processor, a power supply port of the CPU processor is connected with the power supply module, the CPU processor is further electrically connected with the communication module and the control module, and the communication module is wirelessly connected to a mobile equipment terminal. The monitoring module collects water level, temperature, humidity and video environment information of accumulated water of the cable channel and transmits the environment information to the CPU processor, and the control module is started through the CPU processor to automatically adjust the environment of the cable channel. The cable can reliably operate in a normal-temperature and dry environment, the service life of the cable is effectively prolonged, the power failure time is shortened, and the power supply reliability is improved.

The utility model provides a contra-rotating ducted fan power device which comprises a ducted shell, a center body, a rotating mechanism, a supporting mechanism and a driving mechanism, the center body, the rotating mechanism, the supporting mechanism and the driving mechanism are arranged in the ducted shell, a ducted inner space is formed in the ducted shell, and the center body is arranged in the center of the ducted inner space. The rotating mechanism, the supporting mechanism and the driving mechanism are all connected to the center body, the supporting mechanism is connected to the middle position of the center body, the driving mechanism is in transmission connection with the rotating mechanism, and the rotating mechanism comprises a first rotating mechanism body and a second rotating mechanism body; according to the contra-rotating ducted fan power device, the rotating directions of the two rotating mechanisms are opposite, the contra-rotating rotating mode can balance torque generated by rotating blades, vibration is reduced, the stability of a system is improved, the service life of the system is prolonged, meanwhile, the contra-rotating blades neutralize the eddy current effect, tail flow kinetic energy loss is reduced, and the service life of the system is prolonged. Therefore, higher thrust efficiency is realized.

The invention relates to the technical field of electric energy routers, in particular to a power distribution area flexible mutual aid system based on an electric energy router, and the system is characterized in that a DC bus in a flexible mutual aid device is connected with an external power distribution area through a plurality of bidirectional DC / AC ports, and is used for completing electrical coupling and power intercommunication; the plurality of bidirectional DC / AC ports are connected with the direct current bus in parallel, the direct current bus is connected with an energy storage port and a photovoltaic port, the energy storage port is communicated with an external energy storage device, the photovoltaic port is communicated with an external photovoltaic device, and the flexible mutual aid device is communicated with an external power grid dispatching through a controller. According to the invention, normalized flexible interconnection between feeder lines is realized through the flexible mutual aid device, potential safety hazards caused by frequent displacement of a conventional switch based on an interconnection switch are avoided, the control flexibility and rapidity of the power distribution network are improved, and the power distribution network has the advantages of open-loop operation and closed-loop operation at the same time.

The utility model discloses an outlet gas temperature regulation and control device of a sulfur burning furnace. The outlet gas temperature regulation and control device comprises a graded regulation and control valve body, a multi-point temperature measurement assembly and a uniform flow temperature control cavity, the graded regulation and control valve body, the multi-point temperature measurement assembly and the uniform flow temperature control cavity are connected in series step by step and are mounted on a furnace gas main pipe at the rear end of the sulfur burning furnace; through the synergistic effect of graded adjustment, multi-point monitoring and forced flow uniformizing, the problems that a traditional device is large in temperature fluctuation and uneven in mixing are solved, the regulation and control precision is improved, and the energy consumption and the maintenance cost of the sulfur acid making process are remarkably reduced.

The invention discloses a working condition self-adaption-based guide vane connecting rod stress trend diagnosis method, and relates to the technical field of intelligent diagnosis of hydroelectric generating sets, and the method comprises the steps: constructing an optical fiber stress monitoring system, setting an optical fiber grating sensor for a guide vane connecting rod, collecting a stress signal in real time, and collecting operation parameters; the method comprises the following steps: collecting multi-working-condition data within one month of normal operation after overhaul of a unit, calculating a correlation matrix between guide vane connecting rod stress and operation parameters, and establishing a stress working condition self-adaptive analysis model; and calculating a maximum value, a minimum value, an average value and a standard deviation of stress based on rolling statistics, determining a normal range of stress fluctuation, inputting real-time acquired data into a diagnosis algorithm, judging a stress deviation trend according to the reference model, outputting an alarm level, and updating the reference model. According to the method, the accuracy and timeliness of anomaly recognition are improved, the pertinence and the performability of maintenance decision making are enhanced, and the operation safety and the service life management effect of the guide vane connecting rod of the hydraulic unit are improved.

The invention discloses a high-capacity circuit breaker heat dissipation structure based on a micro-nano structure heat pipe, and belongs to the technical field of circuit breaker heat dissipation. Comprising a vacuum arc extinguish chamber, an arc extinguish chamber heat dissipation device, a micro-nano structure heat pipe and a heat pipe heat dissipation device. The arc extinguish chamber heat dissipation devices are arranged on the two sides of the vacuum arc extinguish chamber, the micro-nano structure heat pipe is embedded in a static conducting rod of the vacuum arc extinguish chamber, and the heat pipe heat dissipation fins are arranged on the heat pipe. Through cooperation of the arc extinguish chamber heat dissipation device and the micro-nano structure heat pipe, radial conduction and axial rapid conduction of heat of the vacuum arc extinguish chamber are realized, and temperature rise of the high-capacity circuit breaker is remarkably reduced.

The invention discloses a control method of a permanent magnet synchronous elevator door motor and a related device, and relates to the technical field of elevator control, and the control method comprises the steps that when it is monitored that an elevator door runs to a door opening in-place position or a door closing in-place position, a preset holding torque of the permanent magnet synchronous elevator door motor is read; the direct-axis current of the permanent magnet synchronous elevator door motor is periodically generated, and the quadrature-axis current corresponding to the direct-axis current generated in each period is periodically calculated based on the holding torque; and periodically controlling the permanent magnet synchronous elevator door motor to output holding torque based on the direct-axis current generated in each period and the quadrature-axis current corresponding to the direct-axis current. The permanent magnet synchronous elevator door motor is controlled to output the holding torque based on the direct-axis current and the quadrature-axis current which change periodically, the magnitude of the current passing through each phase winding can be uniform, and therefore the risks of local overheating of the winding and demagnetization of the permanent magnet are reduced, the service life of the system is prolonged, and the stability of the system is improved.

The utility model relates to oral liquid production technical field, concretely relates to an oral liquid packaging production line, and one end of one of two conveyors is in penetration with the frame and the drive motor output shaft transmission connection through the bolt fixed connection of the outer wall one side of the frame, and the both sides of the top of conveyer belt are equipped with the clamping plate, and the both sides of the clamping plate are all away from the elastic connection between the inner wall of the frame, effectively solved the problem that the different size bottled oral liquid lacks the limiting adjustment function in the conveying process in the prior art, and the stability is poor, the traditional conveying device adopts the fixed width conveyer belt or track structure, cannot adapt to the limiting demand of various bottle type, leads to the frequent phenomenon of the small bottle easy to pour, the big bottle easy to jam and the like, influences production continuity and product quality.

This utility model discloses a guide rod fixation device, including: an aluminum guide rod; a swaying buffer device assembled on the top of the aluminum guide rod; the above device is flexibly connected to the busbar through the mounting plate of the swaying buffer device; multiple sets of springs and damping rods synchronously absorb the swaying energy caused by bubbles and magnetic fields, so that the top no longer amplifies the swaying amplitude, and the busbar joint remains pressed and without discharge; the connection and installation device composed of the T-shaped plate, connecting rod, nut, and spring 2 elastically locks the aluminum guide rod on the steel beam, which allows for thermal expansion differences and continuously transmits downward pressure, avoiding stress concentration in rigid welds; after the steel beam is transitioned through the explosive weld transition block, it forms an adjustable pre-tightening pair with the connecting rod through the mounting sleeve hole, so that the steel beam is always under upward tension; the steel rod auxiliary clamping assembly composed of the steel rod body, support rod 2, clamping block, and connecting bolt 2 clamps each steel rod at multiple points, dispersing the neck bending moment and inhibiting oxidation penetration, ultimately eliminating the risk of overall fall, while improving conductivity stability and service life.

The utility model provides a kind of insulating bearing cable anchor, comprising: connecting component, with power transmission line hardware connection and bear load;Core body lifting ring, accommodate the glass fiber reinforced silicone rubber wire harness wound to form core body and bear load;Clamp, the inner cavity of the clamp is horn shape, the horn shape inner cavity is consistent with the wire harness of the core body lifting ring wire slot tangent direction introduction, gather has been wound in the core body lifting ring, wire harness, which needs to be shaped, is shrunk into substantially cylindrical through the cylindrical outlet of the clamp;The connecting component is connected with the core body lifting ring, and the clamp is tightly clamped on the core body lifting ring. The utility model has the beneficial effects that: by the inner cavity of the clamp is horn shape, improve the stress state of wire harness, and by additionally provided glue injection hole groove A and glue injection hole B, form complete sealing structure after silicone rubber overall coating forming, improve the reliability of product and overall electromechanical performance.

The application discloses a transformer de-blocking of inrush current implementation method, device, medium and equipment. The method comprises the following steps: calculating the differential current sampling value mutation of the transformer corresponding to the sampling point in the first predetermined time interval; in the case that the differential current sampling value mutation of the two continuous sampling points meets the starting criterion, the time corresponding to the latter sampling point is determined as the first starting time; after the second predetermined time interval from the first starting time, in the case that the differential current sampling value mutation of the two continuous sampling points meets the starting criterion, the time corresponding to the latter sampling point is determined as the second starting time; after the first starting time, whether to send a blocking signal is determined according to the differential current sampling value mutation and the intermittent angle blocking criterion; whether to send a blocking signal is determined according to the differential current sampling value mutation of the two sampling points of the second starting time and the intermittent angle blocking criterion, and whether the transformer is de-blocked from the excitation inrush current is determined.

The application relates to the field of high-speed train high-voltage system equipment, in particular to a voltage transformer for a high-speed train high-voltage system, which comprises a supporting plate, a fixed plate, a supporting elastic piece and an energy dissipation plate. The supporting elastic piece is used for primary energy dissipation of a voltage transformer body, the energy dissipation plate is used for secondary energy dissipation of the voltage transformer body, and the energy dissipation plate is easy to reset under the influence of gravity, so that the voltage transformer body is more likely to keep good stability during high-speed train bumping, thereby realizing the effect of efficiently buffering and dissipating the voltage transformer, and prolonging the operation life of the high-speed train roof voltage transformer.

The application relates to the field of life extension control, and discloses a wind turbine adaptive life extension control method based on reinforcement learning, which is used for providing reliable technical means for the life extension of a wind turbine. The method comprises the following steps: collecting the operation state of the wind turbine and key component health parameters, generating multi-dimensional state information; establishing a damage evolution model according to the multi-dimensional state information, predicting the residual life and generating a health degree index; designing a multi-objective optimization strategy, solving and generating a cooperative control instruction; and after the execution of the instruction, dynamically updating the model and the strategy based on the wind turbine state feedback, so as to form a closed-loop control system. The application effectively prolongs the life of the wind turbine.

The application discloses a needle-tooth shell assembly and a speed reducer, and solves the problem of high difficulty in needle selection and the problem of speed reducer failure caused by needle-tooth groove wear in the prior art. The needle-tooth shell assembly comprises a needle-tooth shell and a needle-tooth sleeve. The needle-tooth sleeve is arranged to be movable on the needle-tooth shell, so that the position of the needle-tooth groove on the needle-tooth sleeve for cooperating with the needle can be adjusted, and the diameter of the needle-tooth shell is adjusted, so that the needle-tooth groove can be adapted according to the selection of the needle, the problem that the needle engagement top gap is too different from the theory due to the error in the diameter screening of the needle in the prior art is solved, the purpose of weakening the adverse effect of the large diameter fluctuation of the needle on the service life of the speed reducer is achieved, the assembly precision of the speed reducer and the service life of the speed reducer are improved, the purpose of reducing the idle stroke of the speed reducer and the attenuation rate of the stiffness curve is achieved, and the service life of the speed reducer is improved.

The utility model relates to a side suction type centrifugal pump, the radial hole for producing the suction force when the runner rotates is set up along the radial of runner on runner, still through the male ring of the female ring in the liquid seal cover ring and the female ring of runner cover connection, form rotatable, when the dynamic closed structure of the dynamic sealing of fluid is carried out in the side suction type centrifugal pump work, the inner chamber of the seal part storage liquid chamber is negative pressure area, the air of outside will leak into the pump chamber, and the machine seal of the utility model can prevent air leak and liquid leak out. The utility model has the advantages that: avoid the big particle slurry to enter the runner radial hole channel, prevent the runner hole from being blocked, the shaft sealing position pressure is low, the vacuum degree is high, can bear the fluid pressure of pump machine inlet 0.1MPa within, and under the premise of setting the wind wheel, the shaft seal (machine seal) used can radiate heat without external cooling water, is safe in operation, and has long service life, under the condition that the inlet fluid pressure is 0.06MPa, can improve the service life of shaft seal (machine seal) 3-4 times.

This invention proposes a liquefied petroleum gas (LPG) hydrogenation catalyst, its preparation method, and its application. The catalyst contains a support and an active metal component; the support is modified γ-alumina, and the modifying agent used in the modified γ-alumina is one or more of Si, Ti, Zr, P, and B; the active metal component is a Group VIB metal sulfide and / or a Group VIII metal sulfide, wherein the average number of lamellar layers of the Group VIB metal sulfide and / or the Group VIII metal sulfide is <1.5 layers, and the proportion of single layers is 70%–90%. The LPG hydrogenation catalyst uses modified γ-alumina as a support, has a low average number of lamellar layers of the active metal component, and a high proportion of single layers; the catalyst still exhibits good organic sulfur removal and olefin saturation performance after long-term operation under high-temperature conditions, demonstrating good stability.

The invention relates to an application of a pyrimidine-based additive in a perovskite solar cell. A pyrimidine derivative with moderate Lewis alkalinity is selected as the additive and forms a moderate and stable coordination intermediate with a lead iodide precursor, so that nucleation of alpha-phase formamidine lead iodide can be accelerated and defect generation can be inhibited; the method is suitable for planar formal and trans-structure devices, the photoelectric conversion efficiency of 25% or above is achieved in the formal structure and the trans-structure, and excellent stability is kept under the long-time operation and storage conditions. The invention provides an additive design principle based on pyrimidine molecules, and provides a theoretical basis and a technical path for development of high-performance and long-life perovskite photovoltaic devices.

The invention discloses a biogas slurry multi-stage thermal cracking system and a waste heat recovery method. The system comprises a feeding pump, a waste heat exchange device, a first-stage thermal cracking device, an interstage reheating device, a second-stage thermal cracking device and a tail gas spraying device which are sequentially connected through pipelines, the method comprises the following steps: pressurizing biogas slurry and then preheating the biogas slurry through a waste heat exchange device; carrying out low-temperature hydrolysis at 110-150 DEG C in a primary thermal cracking device to generate amino acid and reducing sugar and reduce the viscosity; rapidly heating to 160 DEG C to 180 DEG C through an interstage reheating device; the mixture enters a secondary thermal cracking device to be subjected to a high-temperature humification reaction, and a humic acid-like substance is generated; after reaction, high-temperature slurry returns to the waste heat exchange device to release heat, and a finished product is discharged after cooling. Through graded temperature control and countercurrent flow heat exchange, the content of humic acid in the product is increased, the problem of scaling of the heater is solved, the waste heat of the system is recycled to the maximum extent, and the method is suitable for resourceful treatment of the biogas slurry.

The utility model discloses a kind of multi-element integrated high-voltage capacitor, it is related to capacitor technical field, the utility model includes shell, baffle and limit strip are respectively fixed in shell inner wall, baffle is provided in shell inside, and two or more than two capacitor elements are provided in baffle top, and lead wire is fixed in the both ends of capacitor element, glue injection hole is opened in baffle bottom, and sealant is filled in the gap of shell inside.The utility model is provided with shell, capacitor element and lead wire, shell and baffle cover capacitor element, capacitor element lead wire is stretched out from baffle and shell bottom, forms a capacitor, two or more than two capacitor elements in shell inside, connect using parallel or series connection mode;When customer installs and uses, multiple capacitors on circuit board need not be carried out in series-parallel connection, just install this multi-element integrated high-voltage capacitor, simplify customer operation, and compared with multiple capacitors in series-parallel connection on circuit board, it is small to occupy PCB board space, reduce equipment volume.

The invention provides a multifunctional on-machine maintenance platform for a high-pressure casting die and a control method.The multifunctional on-machine maintenance platform for the high-pressure casting die comprises a base, the base is located on one side of a die bridge of a die casting machine, a lifting mechanism is arranged on the base, and a lifting platform is arranged on the lifting mechanism; the lifting mechanism is used for controlling lifting of the lifting platform, a fixed foot board is arranged on the lifting platform, a telescopic mechanism and a telescopic platform are arranged on the fixed foot board, the telescopic platform is in sliding connection with the fixed foot board, and the telescopic mechanism is used for controlling the telescopic platform to stretch out of the fixed foot board. Therefore, a maintenance platform is formed above or below the green columns. The mode that a vertical lifting platform is arranged in the lower portion of a traditional die bridge is broken through, an extension ladder type maintenance platform structure extending out of a die-casting machine operation platform is provided, and the problems that a traditional fixed maintenance platform can only cover the single height, the operation space is limited, and potential safety hazards exist when workers operate in gaps are thoroughly solved.

This application discloses a power tool motor with a switch, characterized in that it includes: a motor body, with two terminals at one end of the motor body away from the output end, the two terminals being connected to a power harness, and a switch device and a power plug connected to the end of the power harness. The switch device is used to control the start / stop of the motor body when the switch is released. Using this method, by connecting the power harness to the motor body, and the power harness having a power connector, user needs are met. Furthermore, the power harness also has a switch device that enables rapid electric braking, reducing wear on the carbon brushes / commutator and improving the safety and accuracy of operation. The switch device also has a protection mechanism, enhancing overall service life and reliability. Moreover, it does not require changes to the core internal design of the motor, making it easy to implement and promote.

A rotating mechanism and a rotating display device are disclosed, relating to the field of display devices. The rotating mechanism includes a base, a driver, a connecting shaft, a first support base, a second support base, and a base plate. The driver, the first support base, and the second support base are all fixed to the base. One end of the connecting shaft is connected to the rotating shaft of the driver, and the other end is connected to the base plate. The connecting shaft is also rotatably connected to both the first and second support bases. The driver drives the base plate to rotate via the connecting shaft. The base plate is used to mount LED strips. This rotating mechanism's structural design improves operational stability, thereby extending service life and reducing operating costs.

The application discloses an energy storage control method and device and an energy storage system. The energy storage system comprises a first energy storage unit and a second energy storage unit, and the first energy storage unit and the second energy storage unit are connected to a load. The second energy storage unit is a lithium ion battery. The energy storage control method comprises the following steps: detecting a load current in real time; determining an energy storage unit for supplying power to the load and controlling an output current of the energy storage unit according to the load current, an upper limit value of an output current of the second energy storage unit and a load current change rate, so that the second energy storage unit limits power output and the first energy storage unit responds to load power change in real time. The first energy storage unit and the second energy storage unit are combined, the second energy storage unit constantly outputs power according to requirements, the first energy storage unit changes the output power to respond to the load power change in real time, the real-time response to the load power change is realized, the economy of energy storage is realized, the two energy storage units are used to supply power, and the overall operation life of the energy storage system is prolonged.

A circuit arrangement for extracting energy from an energy harvester is proposed. The circuit arrangement (1) comprises an integrated circuit (3) connected to the energy harvester (2) and configured to extract energy from the energy harvester, an energy accumulator (4) connected to the integrated circuit for receiving said energy extracted by the integrated circuit, and a switch (5) arranged between the integrated circuit and the energy accumulator for selectively disconnecting the accumulator from the integrated circuit (3). The integrated circuit (3) is configured to output a control signal, said control signal being either inverting or non-inverting and configured to close the switch (5) when the integrated circuit is able to extract energy from the energy harvester (2) and to open the switch when the integrated circuit (3) is not able to extract energy from the energy harvester (2), to thereby disconnect the integrated circuit from the accumulator (4).

The utility model relates to the field of battery storage, in particular to a waterproof and dustproof battery box sealing structure of an electric vehicle. According to the technical scheme, the sealing device comprises a box body and a sealing mechanism fixed to one side of the outer wall of the box body, the sealing mechanism comprises a connecting base fixed to one side of the outer wall of the box body, a sealing ring is fixedly connected to one side of the connecting base, and the outer wall of the connecting base is slidably connected with a connecting sealing cover through a plurality of connecting screws; a connecting sealing cover is arranged in the box body, a pressing cover plate is fixedly connected to one side of the outer wall of the connecting sealing cover, a pressing groove is formed in the inner wall of the pressing cover plate and corresponds to the sealing ring, a plurality of sliding grooves are formed in the inner wall of the box body, a clamping groove is formed in one end of each sliding groove, and a clamping mechanism is arranged on one side of the outer wall of the connecting sealing cover. The waterproof and dustproof battery box sealing structure of the electric vehicle has the functions of being tighter in sealing, better in waterproof and dustproof effect and capable of prolonging the service life of the battery.

The utility model discloses a supercritical heat storage top peak heat supply unit, including steam turbine system, steam heat storage system, heat network system and power grid system, steam turbine system includes the steam turbine and generator of cooperation, and steam heat storage system includes steam water heat exchanger and hot water heat storage jar, and heat network system includes first station, primary network heat supply pipe and heat user, and primary network heat supply pipe includes primary network backwater pipe and primary network water supply pipe, steam turbine passes through first station and connects primary network heat supply pipe, and primary network heat supply pipe is connected with heat user, and steam turbine passes through steam water heat exchanger and connects hot water heat storage jar, and hot water heat storage jar connects primary network heat supply pipe, sets up expansion water tank and water replenishing pump, and the water inlet of expansion water tank is connected with primary network backwater pipe, and the water outlet is connected with water replenishing pump inlet, and water replenishing pump outlet is connected with primary network water pipe, the utility model discloses the adjusting effect of expansion water tank can more effectively absorb and release heat, thereby improves the efficiency of heat storage, and reduces the operation pressure fluctuation of unit.