213results about "Pressure pumps" patented technology

The invention discloses a compressed air heat storage system and a heat storage method based on gas driving. The compressed air heat storage system comprises a power generator, a plurality of air compressors, a plurality of expansion machines, a heat exchanger, a compressed air storage tank, a high-temperature water storage tank and a low-temperature water storage tank. The multiple air compressors are sequentially connected with the corresponding first heat exchangers, then arranged in series and connected with an air inlet of the compressed air storage tank. The multiple expansion machines are sequentially connected with the corresponding second heat exchangers, then arranged in series and connected with an air outlet of the compressed air storage tank. The first end of the high-temperature water storage tank is connected with the first branch of the first pipeline, the second end is connected with the water outlet end of the first heat exchanger, and the third end is connected with the water inlet end of the second heat exchanger; the first end of the low-temperature water storage tank is connected with the second branch of the first pipeline, the second end is connected with the water inlet end of the first heat exchanger, and the third end is connected with the water outlet end of the second heat exchanger; according to the invention, efficient recovery and reutilization of compression heat are realized.

A pressure exchange chamber, the pressure exchange chamber comprising: a pressure exchange chamber tube (12), the pressure exchange chamber tube extending around a periphery; a drive fluid input valve (44) and a drive fluid output valve (46), both valves being enclosed by the pressure exchange chamber tubes; and a slurry input valve (34) and a slurry output valve (36), both valves being enclosed by the pressure exchange chamber tubes. Also disclosed is a hydraulic ore lifting system (HOHS) for the ocean comprising a plurality of such pressure exchange chambers.

Various examples are provided related to airlift pumping of downhole geothermal fluids. In one example, an airlift system includes a compressor; a gas sparger head in a wellbore of a geothermal well, and a pressure head recycle assembly. The sparger head produces artificial lift of the geothermal fluids by injecting a gas resulting in a difference in density downhole. The entrained gas can be extracted by the pressure head recycle assembly, compressed, and reinjected downhole. The geothermal fluid at the well head can be used in direct use applications or in a thermodynamic cycle to make shaft power. The gas sparger head can include a venturi shaped passage extending through the gas sparger head and a bubble orifice including gas orifices radially spaced about a narrow portion of the venturi shaped passage. The gas orifices can have a corresponding resonant chamber through which the gas (e.g., air) is provided.

The invention provides a cooling device, a control method, a compression system and an air conditioner, the cooling device comprises a cooling unit and a vacuum pump, the cooling unit comprises an oil storage tank and an oil conveying tank, an oil inlet and an exhaust port are formed in the upper end of the oil conveying tank, and an oil outlet is formed in the lower end of the oil conveying tank; the oil inlet pipeline communicates with the oil storage tank and the oil inlet. The exhaust pipeline communicates with the vacuum pump and the exhaust port. Under the action of the vacuum pump, air in the oil conveying tank is exhausted, so that negative pressure is formed in the oil conveying tank; under the action of negative pressure, cooling oil in the oil storage tank enters the oil conveying tank through the oil inlet pipeline, and then the cooling oil in the oil conveying tank is output through the oil outlet pipeline; the scheme that the vacuum pump replaces a traditional oil pump is adopted, cooling oil in the oil storage tank is input into the oil conveying tank through negative pressure, then the cooling oil is output through gravity, and conveying of one or more kinds of cooling oil is achieved; due to the characteristic of negative pressure driving, the device is not influenced by the viscosity of cooling oil and can be compatible with cooling oil with different rheological characteristics; when cooling oil is replaced, only the oil conveying tank and the corresponding pipeline need to be cleaned.

An in and out flood restoration system and method of using the same is provided. The system may include a recovery tank with an internal storage volume to store a recovered flood liquid, one or more air openings, and one or more liquid openings. The recovery tank may be sealed or generally air tight. The system may include a suction / blower assembly, or a suction source and a blower source, to produce a suction (or negative) pressure and a blower (or positive) pressure at the one or more air openings. The system may include a suction hose and discharge hose to retrieve and dispose of the flood liquid to and from the one or more liquid openings of the recovery tank. The system may further include a stationary or rolling frame for use when the system is in an operation mode or a storage mode, and at least one sound suppressor.

The utility model discloses a chemical delivery pump, which comprises a cavity and a seal cover covering the opening of the cavity, two independent cavities are arranged in the cavity, each cavity is divided into an air cavity and a liquid cavity, the tops of the air cavities and the tops of the liquid cavities are communicated, a liquid inlet pipe, a liquid discharge pipe and two air pipes are arranged on the seal cover, the lower ends of the air pipes are respectively communicated with the two air cavities, and the two air cavities are communicated with the liquid discharge pipe. The upper end of the liquid inlet pipe is provided with an air inlet and an air outlet, the liquid inlet pipe is provided with two branch liquid inlet pipes which are respectively inserted into the two liquid cavities, the liquid outlet pipe is provided with two branch liquid outlet pipes which are respectively inserted into the two liquid cavities, the lower ends of the two branch liquid inlet pipes are provided with one-way liquid inlet valves, and the lower ends of the two branch liquid outlet pipes are provided with one-way liquid outlet valves. The chemical delivery pump has the advantages that the chemical delivery pump does not contain easily-damaged movable parts inside, is long in service life and has the advantages of stably delivering chemicals, and the water hammer phenomenon can be avoided.

A buoy assembly for use with a pumping system to pump liquid and debris from a flooded shaft or well or any such structure with appreciable depth is provided. The buoy assembly includes a proximal tube that can couple to an end of a hose coupled at an opposite end to the pumping system. A buoy is coupled to the proximal tube that provides the buoy assembly with buoyancy that allows the buoy assembly to float on the liquid in the shaft. The buoy can have one or more aeration ports that can be selectively opened (by removing a plug therefrom) to allow airflow therethrough into the buoy. The buoy assembly also has an adapter socket with feet that define vents therebetween to allow passage of debris via the vents into the buoy. Flow of air into the buoy via the aeration ports facilitates lift of liquid and debris through the conduit during a pumping operation.

The invention relates to the technical field of vacuum water diversion, in particular to a vacuumizing node device capable of automatically controlling a water level and a using method of the vacuumizing node device. The water pump is connected to the water inlet pipe, is higher than the water inlet pipe and comprises a node tank, and the bottom of the node tank is connected with the water pump; one end of the exhaust pipeline is connected to the top of the node tank, the other end of the exhaust pipeline is connected to the vacuum pump unit, and an electromagnetic valve is arranged on the exhaust pipeline; the liquid level meter is connected with the control system, and the liquid level meter is used for detecting whether water in the node tank reaches the lowest water level and the highest water level or not and sending a detection signal to the control system, so that the control system judges whether the electromagnetic valve is opened or not to extract air in the node tank so as to raise the water level in the node tank. The node tank has the advantages that the lowest water level and the highest water level in the node tank are detected by arranging the liquid level meter, the water level is controlled between the lowest water level and the highest water level, the situation that a single liquid level meter is arranged, an electromagnetic valve is opened after the water level is slightly lowered, and air exhaust is conducted in the node tank is avoided, and frequent opening of the electromagnetic valve is avoided.

The utility model relates to a shallow water pneumatic dredging pump which comprises at least three pump bodies, each pump body is a hollow cavity defined by a front wall, a rear wall, an upper wall, a lower wall and a side wall, a mud inlet channel is formed in the front portion of each pump body, a sealing cover plate is hinged to each mud inlet channel, and the mud inlet channels are opened or closed through rotation of the sealing cover plates. The pump is characterized in that the pump body is a flat cavity long and narrow in front and back, an air inlet channel is formed in the front portion of the upper wall, and an exhaust channel is formed in the rear portion of the upper wall and communicated with a negative pressure device; and the rear part of the pump body is also provided with a sludge discharge channel. The shallow water pneumatic dredging pump is simple in structure, convenient to manufacture and suitable for environment-friendly dredging under the shallow water working condition with the water depth smaller than one meter.

A motionless pumping design that reduces operation and maintenance costs, and enhances reliability in three aspects of pneumatics system configuration. A motionless and corrosion-resistant pump which uses the continuous generation of pressure variation push / pull force by relying on the venturi effect induced by a pair of gas ejectors together with an argon pneumatic sub-system.

The invention belongs to the technical field of liquid variable-volume machinery, and particularly relates to a balance method high-pumping-speed vacuum system and an application method thereof.The balance method high-pumping-speed vacuum system comprises a vacuum pump and a vacuum main pipeline connected with the vacuum pump and further comprises a negative pressure cabin and a balance pipeline, and the volume of the negative pressure cabin is larger than that of the vacuum cabin; the two ends of the balance pipeline are connected with the negative pressure cabin and the vacuum cabin respectively, the vacuum main pipeline, the first branch pipeline, the balance pipeline and the vacuum cabin are sequentially communicated, a first vacuum valve is arranged on the first branch pipeline, the vacuum main pipeline, the second branch pipeline, the balance pipeline and the negative pressure cabin are sequentially communicated, and a second vacuum valve is arranged on the second branch pipeline. A balance regulating valve is arranged on the balance pipeline; the application method comprises the following steps: S1, pre-pumping the negative pressure cabin; s2, a vacuum chamber is pre-vacuumized; s3, rapid balancing; and S4, pumping is supplemented to the target pressure. The requirement for rapid air exhaust of the vacuum chamber can be met, and energy consumption is reduced.

The invention relates to a compressor unit (10) for isothermal compression of a working fluid (24), with at least one compressor chamber (11), from which the working fluid (24) can be at least partially displaced in a compression process by being compressed by a compressor fluid (22), and with at least one fluid chamber (16) which is arranged in thermal contact with the compressor chamber (11), in particular at least partially surrounding the same. The fluid chamber (16) is fluidically decoupled from the compressor chamber (11) or arranged so as to be decoupled.

The utility model relates to the technical field of mining drainage equipment, in particular to a mining automatic drainage device. The automatic drainage device comprises a shell, an inner cavity of the shell is vertically divided into a gas path cavity and a drainage cavity by a sealing plate, a gas path module and a mechanical control module are correspondingly arranged in the gas path cavity and the drainage cavity respectively, and a first gas path pipe and a second gas path pipe on the gas path module penetrate through the sealing plate and are connected with the mechanical control module arranged in the drainage cavity. The device has the advantages that the safety coefficient of underground operation can be effectively improved by adopting pure mechanical design, electricity utilization danger in traditional electromagnetic needle detection is avoided, the whole device is integrally designed, a drainage cavity is used for replacing a traditional diaphragm pump, the problem that the diaphragm pump is prone to being damaged is avoided, and the whole device is simple in structure, low in cost, low in maintenance cost and suitable for popularization and application. The market requirements are met.

Provided is a pressurizing apparatus that pressurizes a photoresist. In an embodiment, the pressurizing apparatus includes: a housing including a wall surface defining an internal space; a film separating the internal space into a first space and a second space; a first inlet which is in communication with the first space; a second outlet which is in communication with the first space; and a pressurization gas inlet which is in communication with the second space, and in the housing, a transverse section of the internal space has a large width of a first direction and a small width of a second direction perpendicular to the first direction, and the width of the internal space in the second direction includes a section which is narrowed toward a second side which is the other side from a first side which is one side in the first direction.

The application discloses a kind of quick liquid filling device and liquid filling method for static level system, and relates to a kind of static level liquid filling device.It can be filled with freeze-proof liquid to entire static level observation system efficiently and quickly without generating air bubble.The static level system includes liquid storage liquid tank with liquid tank upper sealing cover on top, PU liquid inlet pipe connected with the outlet of the bottom of liquid storage liquid tank and several static level sensors in series in PU liquid inlet pipe;freeze-proof liquid tank provides freeze-proof liquid for static level system;The quick liquid filling device includes vacuum pump, speed regulation circuit board and lithium battery connected with each other, the speed regulation circuit board is powered by lithium battery for vacuum pump, and the speed of the vacuum pump is controlled by the speed regulation circuit board.The application has the advantages of self-power supply, high liquid filling efficiency, low labor intensity, controllable and adjustable pressure during liquid filling process, and can perform system air tightness pre-checking.

A plunger lift management system may measure a casing pressure data series of an annular space between a casing and a tubing. A plunger lift management system may measure a tubing pressure data series of the tubing. A plunger lift management system may generate a pressure differential data series based on the casing pressure data series and the tubing pressure data series. A plunger lift management system may, based on the pressure differential data series, a weight of a plunger, and a length of the tubing, identifying a weight of liquid lifted by the plunger.

The present application relates to the technical field of incubation bin assembly, and aims to provide an incubation bin liquid discharge device and an immunohistochemical device to solve the technical problem of low liquid discharge efficiency of the incubation bin in the prior art, which affects incubation and reaction operation. The immunohistochemical device comprises a bottom plate and an incubation bin assembled on the bottom plate, and further comprises an incubation bin liquid discharge device assembled on the bottom plate, wherein the incubation bin liquid discharge device is connected with the incubation bin in correspondence, and the incubation bin liquid discharge device comprises a transfer bin and a liquid discharge channel connected at one end of the transfer bin, the other end of the liquid discharge channel is provided with a liquid inlet, and the liquid inlet is used for butting against a waste liquid pipe at the bottom of the incubation bin; a quick liquid discharge device is connected on the liquid discharge channel or the transfer bin, and the quick liquid discharge device is used for sucking the transfer bin to quickly suck the waste liquid in the waste liquid bin into the transfer bin.

The utility model discloses a drilling circulating liquid suction device for field operation in severe environment and shortage of conditions, which comprises a front-stage liquid storage tank and a rear-stage liquid storage tank, the front-stage liquid storage tank is provided with a detachably connected liquid suction pipe, the rear-stage liquid storage tank is provided with an air suction pipe, and the air suction pipe is connected with an air inlet of a drilling machine engine; the upper portion of the rear-stage liquid storage tank is connected with the upper portion of the front-stage liquid storage tank through an air suction and liquid passing pipe. The front-stage liquid storage tank and the rear-stage liquid storage tank which are arranged in a cascading mode are arranged, suction power is generated through air inlet of the engine, and the device is independent of electric power, suitable for field construction, convenient to carry and assemble, convenient to use, firm and durable. In addition, the flowing condition of the liquid from the front-stage liquid storage tank to the rear-stage liquid storage tank can be observed through the air suction and liquid passing pipe, so that whether the liquid in the drill hole is completely pumped or not is judged, and safety and reliability are achieved.

The invention relates to the field of underground water dewatering technical equipment, and discloses a pneumatic dewatering pump which is characterized in that a water outlet pipe and an air inlet pipe a and an air inlet pipe b are arranged in an upper tank body and a lower tank body, the air inlet pipe a and the air inlet pipe b are connected with an electromagnetic valve b, the electromagnetic valve a is connected with an air source, a control system comprises a chip, a switch switching key and a pressure sensor, and the electromagnetic valve b and the electromagnetic valve a are connected with the control system. A pipeline generator is arranged between the electromagnetic valve a and the electromagnetic valve b, and a lithium battery pack is arranged between the pipeline generator and the control system. The working method comprises the following steps: turning on a power supply, and feeding air into the electromagnetic valve b by the electromagnetic valve a; air passes through the pressure sensor along the pipeline and enters the upper tank body; the chip continuously grabs a signal of the pressure sensor, and water is squeezed out; and stopping air inlet, releasing pressure, feeding air into the lower tank body, feeding air into the lower tank body through the air inlet pipe, pressing out water from the water outlet pipe, stopping air inlet when the time is up, and repeating the steps until emptying. The underground water can be safely, intelligently and quickly discharged in an energy-saving manner.

A dump valve arrangement (32) for use with a discharge riser (20) comprises: a settling chamber (66) configured to couple to a lower portion of the discharge riser, a dump valve (72) operable to permit or prevent the flow of medium from the discharge riser into the settling chamber; pressurising bypass line (38) operates as a compression input to the settling chamber to pressurise the settling chamber to reduce a pressure differential between the settling chamber and the lower portion of the discharge riser prior to opening the dump valve; a decompression output (76, 78) to reduce the pressure in the settling chamber after the dump valve has opened; and an outlet (70) for emptying the contents of the settling chamber once the pressure in the settling chamber has reduced sufficiently.

The proposed group of inventions relates to the field of pumping equipment adapted for pumping a gas-containing liquid by acting on said liquid using a medium released from the gas-containing liquid itself. For extracting a gas-containing liquid, production tubing and at least one electromechanical transducer are installed in a borehole. Attached to each of the two opposing ends of the electromechanical transducer is at least one vibration concentrating waveguide which acts on the gas-containing liquid from two opposing ends of a core of the transducer. The position of the electromechanical transducer inside the borehole is fixed by means of a protruding member situated in a region of zero vibration amplitude on each of the vibration concentrating waveguides. The electromechanical transducer is installed inside the borehole above the bubble point pressure level of the gas-containing liquid, electrical energy is fed to a winding on the core, and gas dissolved in the gas-containing liquid is released, giving rise to a gas-liquid mixture which is raised to the surface by the lifting energy of the released gas and the pressure on the bottom of the hole. The technical result includes increasing the amount of gas released from a unit volume of a gas-containing liquid, with no significant increase in the mass characteristics of the equipment used, and ensuring that the electromechanical transducer is securely fastened and held inside the borehole in the presence of high-frequency vibrations. In addition, the proposed solution obviates the need for equipment for feeding auxiliary fluids into a borehole in order to extract a gas-containing liquid.

The invention discloses a fluid rapid supply device. The device comprises a vacuum tank; a plurality of flow storage tanks; a negative pressure extraction device; a plurality of control valves; a control module; a pressure sensor; wherein the vacuum tank is connected with each flow storage tank through a pipeline, the negative pressure extraction device is connected with the vacuum tank and is used for extracting negative pressure from the vacuum tank, and the control valves are respectively and independently arranged on the pipelines for connecting the vacuum tanks and the flow storage tanks and are used for controlling the communication of the corresponding vacuum tanks and the corresponding flow storage tanks; the vacuum tank has a first capacity, the single flow storage tank has a second capacity, the first capacity of the vacuum tank is greater than the second capacity of the flow storage tank, the negative pressure extraction device performs negative pressure extraction on the flow storage tank before liquid supply is started, so that the vacuum tank keeps a first negative pressure, and the control module is connected with the corresponding sensor, the control valve and the negative pressure extraction device. The control valve and the negative pressure extraction device are used for controlling the control valve and the negative pressure extraction device, so that negative pressure in the vacuum tank carries out negative pressure liquid suction on at least one flow storage tank.

The present invention relates to a pump (10) where the pressure of solutions, having electrical conductivity, can be increased without needing usage of mechanical parts. As an improvement, the subject matter pump (10) comprises: a primary medium (11) associated with an input port (51) of an ejector (50), a secondary medium (12) associated with a suctioning port (52), a primary electrode (21) provided in said primary medium (11), a secondary electrode (22) provided in said secondary medium (12), a power supply (20) associated to said primary electrode (21) and said secondary electrode (22), an ion selective membrane (30) and a pressure retaining membrane (40) which separate the primary medium (11) and the secondary medium (12) from each other.

The utility model provides a goaf accumulated water drainage device which comprises a tank body, and a cover plate for sealing an opening of the tank body is arranged at the upper end of the tank body; a filtering hole is formed in the filtering plate, a cavity in the tank body is divided into a liquid outlet cavity and a liquid inlet cavity by the filtering plate, a liquid inlet pipe communicated with the liquid inlet cavity is fixedly arranged on the tank body, a liquid outlet pipe communicated with the liquid outlet cavity is fixedly arranged on the tank body, and the liquid outlet pipe is communicated with the liquid inlet end of the drainage pump; the negative pressure pipe is communicated with the liquid outlet cavity, and the negative pressure pipe is communicated with the air inlet end of negative pressure equipment; and the deslagging pipe is communicated with the bottom end of the liquid inlet cavity. The drainage pump has the advantages that the filter plate plays a role in filtering, the drainage pump is prevented from being damaged by broken stones, the device can pump water at the position higher than the water accumulation position due to the arrangement of the negative pressure pipe, and the application range of the device is widened.

The utility model relates to drainage equipment, in particular to a portable active siphon system for rapid drainage, which comprises a vacuum pump body and is technically characterized in that one side of a cavity where an impeller of the vacuum pump body is located is connected with an air exhaust pipeline, the other side of the cavity where the impeller is located is connected with an air exhaust pipeline, and the other end of the air exhaust pipeline is communicated with a negative pressure centralized control pipe. The other end of the exhaust pipeline is communicated with the atmosphere, the two ends of the negative pressure centralized control pipe are used for being connected with a siphon pipeline water inlet section and a siphon pipeline drainage section respectively, a pressure relief pipeline communicated with the atmosphere is additionally arranged on the top face of the negative pressure centralized control pipe, a first control valve is arranged on the exhaust pipeline, a second control valve is arranged on the exhaust pipeline, and a third control valve is arranged on the pressure relief pipeline. Compared with a fixed siphon drainage device, the siphon drainage device is convenient and flexible to use and low in use cost, and meanwhile, compared with a movable siphon drainage device, the automatic level is further improved, the labor intensity of workers is reduced, the drainage efficiency is improved, and potential safety hazards are reduced.

The utility model discloses a hydraulic pump residual oil extraction device which comprises a shell, a display screen is arranged in the middle of the front face of the shell, a containing groove is formed in the bottom of one side of the shell, a folding tray is hinged to the bottom of the containing groove, a bottle body folding frame is hinged to the top of the containing groove, and an oil storage bottle is placed on the top of the folding tray. A first groove is formed in the side, close to the containing groove, of the shell, an exhaust port is formed in one side of the first groove, a second groove is formed in the other side of the shell, an air inlet is formed in the middle of the second groove, a control panel is installed on the front face of the inner wall of the shell, a storage battery is arranged at one corner of the inner wall of the shell, and a direct-current switch is arranged on the side, close to the storage battery, in the shell. According to the hydraulic pump residual oil extraction device, residual oil can be conveniently extracted from a spline shaft groove of a liquid pump through the whole hydraulic pump residual oil extraction device, and pollution caused by the fact that the residual oil flows into a speed reducer through a spline shaft center hole is avoided.

The present invention discloses a non-electrically powered oil supply system, which relates to the technical field of oil supply, and comprises an oil tank, a vacuum tank, a negative pressure generating unit, an oil outlet pipeline, an oil inlet pipeline, an exhaust pipeline, a circulating negative pressure pipeline and a circulating air extraction pipeline; the exhaust pipeline and the circulating negative pressure pipeline are connected in a controllable opening and closing manner; a cylinder-driven quantitative oil pumping unit is installed on the oil outlet pipeline to ensure the accuracy of fuel delivery; the vacuum tank is connected to the oil tank and the circulating negative pressure pipeline in a controllable opening and closing manner; the vacuum tank and the negative pressure generating unit are connected through the circulating air extraction pipeline, and the negative pressure generating unit is driven by the cylinder to maintain the vacuum tank in a negative pressure state, so that the fuel in the oil inlet pipeline is sucked into the oil tank, and the volatile gas of the fuel is discharged through the circulating air extraction pipeline; the pressure in the oil tank can be dynamically adjusted by the linkage control of the exhaust pipeline and the circulating negative pressure pipeline, and rapid oil supply can be achieved in cooperation with the quantitative oil pumping unit, so that efficient and non-electric oil supply operation can be achieved.

The application provides a uniform material adjusting and relay bin and method for deep-sea mining air-lift lifting, which comprises a relay bin outer cylinder and a relay bin inner cylinder arranged inside the relay bin outer cylinder; a material conveying pipe and a lifting pipe are penetrated from the top of the relay bin outer cylinder and enter the relay bin inner cylinder to cooperate with the gap between the relay bin inner cylinder; a lifting mechanism is connected to the bottom of the relay bin inner cylinder; the inside of the relay bin inner cylinder is provided with a rotating mechanism; a measuring device is installed on the top of the relay bin inner cylinder, which is used to measure the distance between the ore layer and the measuring device, and according to the measurement result, the lifting mechanism lifts the relay bin inner cylinder, so that the depth of the bottom end opening of the lifting pipe being buried by the ore layer is controlled, and the material conveying pipe is not inserted into the ore layer. The application avoids the reduction of the ore lifting efficiency caused by the hollow of the lifting pipe opening and the excessive burying of the ore layer, guarantees the full acceleration of the rising seawater of the lifting pipe to the ore and the smooth feeding of the material conveying pipe, and effectively improves the lifting stability of the ore.

This invention discloses a rapid fluid supply device, comprising: a vacuum tank; multiple storage tanks; a negative pressure extraction device; multiple control valves; a control module; and a pressure sensor. The vacuum tank and each storage tank are connected by pipes. The negative pressure extraction device is connected to the vacuum tank and is used to draw negative pressure from the vacuum tank. The control valves are individually configured on the pipes connecting the vacuum tank and the storage tanks, and are used to control the connection between the corresponding vacuum tank and the corresponding storage tank. The vacuum tank has a first capacity, and each storage tank has a second capacity. The first capacity of the vacuum tank is greater than the second capacity of the storage tank. Before the fluid supply begins, the negative pressure extraction device draws negative pressure from the storage tanks, maintaining a first negative pressure in the vacuum tanks. The control module is connected to the corresponding sensor, control valves, and negative pressure extraction device, and is used to control the control valves and negative pressure extraction device, so that the negative pressure in the vacuum tank draws liquid from at least one storage tank.