51results about "Pressure exchangers" patented technology

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.

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 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 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 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.

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.

The utility model discloses a construction joint processing device for tunnel engineering construction, including work table, rotation connection in the surface of work table electric telescopic link, the head subassembly of scraping, including fixedly connected in the connecting strip of electric telescopic link end, the material receiving groove of connecting in connecting strip one side, the scraper of fixed setting in material receiving groove inside and one end stretches out, the two connecting rods of connecting between connecting strip and material receiving groove, the connecting rod sliding passes through connecting strip, the head subassembly of scraping of through the design can to construction joint surface excess colloid and carry out the processing, because material receiving groove just designs in the outside of scraper, then no matter to the construction joint of where carries out and smooths, the colloid that falls down will drop into material receiving groove inside and completes the collection, simultaneously through the design of negative pressure cabin and suction pipe subassembly, can suck out the glue that collected in material receiving groove inside, avoids the overflow of glue, under the cooperation of above structure, can collect and handle the glue that scrapes down perfectly.

The invention belongs to the technical field of gas extraction and drainage, and discloses a negative pressure stabilizing device for gas extraction and drainage in an underground coal mine, which comprises an extraction pipeline, the lower side of the extraction pipeline is fixedly communicated with a one-way water inlet pipe, and one side, far away from the extraction pipeline, of the one-way water inlet pipe is fixedly communicated with a negative pressure drainage tank; through cooperation of the oppositely-opened shell, the dust filtering cover, the brush, the one-way water guide pipe, the sponge brush and other structures, the effect of integrating the three functions of impurity brushing, water spraying cleaning and water stain wiping is achieved, the filter screen cover is arranged outside the exhaust pipe, the situation that coal powder, rock powder and other light-weight solid impurities flow back into a pipeline along with gas flow again is avoided, and the service life of the pipeline is prolonged. When the floating ball floats upwards, the circular groove rod also moves upwards, the cambered surface extrusion block is extruded through the spiral groove to drive the oppositely-opened shell on the rotating disc to continuously rotate, and the pair of brushes located on the oppositely-opened shell abut against the inner side and the outer side of the dust filtering cover to continuously brush the inner side and the outer side of the dust filtering cover, so that the net surface is cleaned in real time.

Vacuum pump (1), in particular a self-priming vacuum pump (1), as a component of a vacuum wastewater system for emptying and flushing toilets, urinals and the like, with a collecting inlet line (3a) which is connected to an inlet (3b) in a housing (2) of the vacuum pump (1) and which is closed inside the housing (2) by a check valve (6) when the vacuum pump (1) is not in operation, optionally with a cutting device which is axially arranged and which comminutes solid substances in the wastewater, further comprising an axially arranged screw spindle which, when rotated, forms a water ring necessary for generating the vacuum and draws in the wastewater by means of vacuum, further comprising an outlet and a drive motor, characterized in that the vacuum pump (1) ▪ comprises a suction nozzle (4) arranged in the inlet (3b), which is configured such that the suction nozzle (4) is always in fluidic contact with an outer diameter (4b) of a water reserve (5); ▪ and the check valve (6) is arranged at an angle between 1° and 90° relative to a vertical axis of the inlet-suction port transition (7) and fully seals the suction port (4), wherein the suction port (4) is further arranged such that, in the event of a leak in the check valve (6), none of its inner diameters (4a) can come into fluidic contact with a level of the water reserve (5), and the suction nozzle (4) is arranged at a height to the water level that ensures a sufficient water reserve (5) for suction under all operating conditions.

A conveying device for conveying a liquid / gas mixture, in particular a crude-oil / natural-gas mixture, taken from a borehole, having a multiphase-pumping device, which can be or is coupled to a feed line and a discharge line and to which the liquid / gas mixture can be fed as a feed flow, via the feed line and via which the mixture can be discharged under increased pressure as a conveyance flow, into the discharge line, and having a recirculation line, via which a sub-flow of the liquid contained in the conveyance flow can be returned to the feed flow. The recirculation line contains an injector, through which the sub-flow is conducted, with a negative pressure being generated in the process, and which can be or is coupled to a gas line, which conducts a gas taken from the borehole. The negative pressure causes the gas to be taken in by suction.

A vacuum pump for use with a siphon system to continuously purge gases that accumulate in a high point of the siphon system, or for priming the inlet to a pump, or to create vacuum for another purpose. Siphon systems require regular purging of gases when operating for long periods of time. The vacuum pump provides a mechanism that operates in a cycling manner. A first stage of the cycle involves filling a chamber using a pressurised liquid supply, and purging all gases from the chamber. A second stage involves isolating the chamber from the surrounding environment, and then allowing the liquid in the chamber to drain into the siphon system, while at the same time gases from within the siphon system are allowed to enter the chamber. Once the liquid has drained from the chamber, the chamber is isolated from the siphon system, and the liquid filling stage is repeated. Continual cycling of this process can purge the siphon system of gases, or be used to produce a vacuum for other purposes.

The present disclosure teaches a system for treating an aqueous effluent comprising: an upflow liquid column configured to retain a fluid; a fluid inlet fluidly coupled with the upflow liquid column and positioned at about a bottom of the upflow liquid column; at least one downflow liquid column that is non-concentric with the at least one upflow liquid column; at least one aerator fluidly coupled with the upflow liquid column and operably configured to deliver a gas to the upflow liquid column such that a plurality of bubbles are formed within the upflow liquid column; a gas headspace above a top of the upflow liquid column, wherein the gas headspace is defined at least partially by a cap; an outlet fluidly coupled with the gas headspace; and a vacuum pump, wherein the vacuum pump is operably configured to create a vacuum in the gas headspace.

The utility model discloses a negative pressure pump, which relates to the technical field of negative pressure pumps and comprises a motor, a pump support body fixed on one side of the motor, a sealing plate arranged on one side of the pump support body far away from the motor, an open impeller arranged on one side of the sealing plate far away from the motor, a spiral blade arranged on one side of the open impeller far away from the motor, and a pump shell arranged on one side of the spiral blade far away from the motor. By arranging the cylinder and the spiral blade, the motor drives the spiral blade to rotate in the cylinder so that negative pressure can be generated in the cylinder, water can be conveniently sucked into the pump shell from the cylinder, and meanwhile the shape of the inner sealing plate is changed so that the water can be conveniently sucked into the pump shell. The optimized annular groove flow channel is formed in the rear cover plate of the pump body, so that a complete liquid baffle can be formed in the rear portion of the open impeller, liquid is prevented from being thrown out behind the impeller, and the liquid can efficiently rotate in the impeller and is guided into the convex flow channel along the pump cavity.

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 application discloses a system for co-processing hazardous waste liquid in a cement kiln, which sequentially comprises a liquid taking device, a double vacuum tank conveying device and a cement kiln atomization spraying device; wherein the liquid taking device comprises a liquid taking gun; the double vacuum tank conveying device comprises an upper vacuum tank group, a lower vacuum tank group, a vacuum pump group, a compressed air pipeline and a vacuum pipeline; the upper vacuum tank group and the lower vacuum tank group are both provided with a hazardous waste liquid inlet, a hazardous waste liquid outlet, a compressed air inlet and an exhaust port; the vacuum pump group is connected with the vacuum exhaust port of the upper vacuum tank group through the vacuum pipeline; the compressed air pipeline is connected with an external compressed air tank through a compressed air pump at the air inlet end, and is connected with the compressed air inlets of the upper vacuum tank group and the lower vacuum tank group at the air outlet end; the hazardous waste liquid inlet of the upper vacuum tank group is connected with the liquid taking gun to suck the waste liquid in a waste liquid tank; the hazardous waste liquid outlet of the upper vacuum tank group is connected with the hazardous waste liquid inlet of the lower vacuum tank group through a connecting pipeline; the hazardous waste liquid outlet of the lower vacuum tank group is connected with the cement kiln atomization spraying device; and the cement kiln atomization spraying device comprises a conveying pipeline and a high-pressure pump, a filtering device and a spray gun arranged on the conveying pipeline; the waste liquid in the lower vacuum tank group is pumped to the kiln tail of the cement kiln through the high-pressure pump, is atomized through the spray gun and is sprayed into the lower part of a C4 cyclone.

A vacuum pump for use with a siphon system to continuously purge gases that accumulate in a high point of the siphon system, or for priming the inlet to a pump, or to create vacuum for another purpose. Siphon systems require regular purging of gases when operating for long periods of time. The vacuum pump provides a mechanism that operates in a cycling manner. A first stage of the cycle involves filling a chamber using a pressurised liquid supply, and purging all gases from the chamber. A second stage involves isolating the chamber from the surrounding environment, and then allowing the liquid in the chamber to drain into the siphon system, while at the same time gases from within the siphon system are allowed to enter the chamber. Once the liquid has drained from the chamber, the chamber is isolated from the siphon system, and the liquid filling stage is repeated. Continual cycling of this process can purge the siphon system of gases, or be used to produce a vacuum for other purposes.

The water pump directly covers a top end opening of a water bucket, a fixed water tank and a suction fan are arranged in the water pump, the water tank is located on the lower portion of the suction fan and communicated with the suction fan through a straight pipe, a water outlet pipe is arranged on one side of the water tank and extends out of the side face of the water pump, and a communicated hose is arranged at the bottom of the water tank and extends into the bottom of the water bucket. The water outlet pipe is provided with a lower one-way valve close to the water tank; the crank penetrates out of the top end of the water pump and is in running fit with the water pump, an air outlet pipe is arranged on the top of the suction fan, and an upper port of the air outlet pipe is located on the top face of the water pump. The upper end opening of the air outlet pipe and the lower end opening of the hose are netlike. The lower end of the crank is fixedly connected with an impeller shaft of the suction ventilator. The hand-operated water pump is used in cooperation with a plastic water bucket, the water bucket does not need to be forcibly held and reversely buckled, the water pump is directly clamped at the upper end of the water bucket, power consumption is avoided, use is convenient, labor is saved, and the hand-operated water pump has high practical value and popularization value.

The invention discloses a steam compression condensate negative pressure drainage system, and relates to the technical field of steam compressors, the steam compression condensate negative pressure drainage system is characterized in that one end of the lower part of a steam compressor is connected with a liquid conveying pipe, the end part of the liquid conveying pipe is provided with a first valve body, one end of the first valve body is connected with a liquid inlet pipe, and the lower end of the liquid inlet pipe is fixedly provided with a liquid storage tank; the liquid discharging assembly is arranged at one end of the liquid storage tank and comprises a water collecting tank, a ball valve, a negative pressure pipe, a three-way connector, an auxiliary pipe, a second valve body and a negative pressure tank. According to the steam compression condensate negative-pressure drainage system, through the arrangement of the drainage assembly, after condensate in a steam compressor flows into a liquid storage tank through a liquid conveying pipe, a first valve body and a liquid inlet pipe, condensate water can be gathered on the periphery of the lower end of a negative-pressure pipe through a water collecting tank, so that the efficiency of subsequent extraction is improved, and in the process, the condensate water in the negative-pressure pipe can be recycled. And the condensate water is guided through the inclined first guide plate and the inclined second guide plate, so that the gathering effect is further improved.

The present invention discloses a multi-channel pipette, comprising a frame, a plunger drive device and at least two groups of liquid-absorbing components, wherein the liquid-absorbing components and the plunger drive device are installed in the frame, and the liquid-absorbing components include a cylinder for connecting a sampling head and a plunger arranged in the cylinder and slidably connected to the cylinder, and the end of the plunger extending out of the cylinder is connected to the output end of the plunger drive device through a drive block, and the plunger drive device drives the plunger to slide back and forth along the axial direction of the cylinder through the drive block. Only one group of plunger drive devices is needed to control the simultaneous movement of multiple liquid-absorbing components, thereby reducing the error in the amount of liquid taken between each independent liquid-absorbing component. In the present invention, the liquid-absorbing components can be controlled by a group of plunger drive devices to achieve synchronous operation, reducing the operating error of the liquid-absorbing components and having a simple and compact structure.

This utility model relates to the field of wastewater treatment technology, specifically an online detachable gas lift and reflux device. It includes: a gas lift tank body, in which the reflux liquid undergoes gas-liquid separation; an exhaust valve located at the upper end of the gas lift tank body; a liquid inlet and a liquid outlet located on opposite sides of the gas lift tank body, with the liquid inlet higher than the liquid outlet; a suction pipe, one end connected to the liquid inlet and the other end inserted into the reflux liquid; and an air inlet pipe, the lower end connected to the end of the suction pipe inserted into the reflux liquid, and the upper end connected to an air supply system. The air inlet pipe is connected to the air supply system via a quick-connect fitting. The liquid inlet is connected to the suction pipe via a quick-connect fitting, and the liquid outlet is connected to the reflux point via a quick-connect fitting. A horn-shaped flow guide is provided at the lower end of the suction pipe. The end of the air inlet pipe connected to the suction pipe is vertically positioned upwards inside the suction pipe and coaxially arranged with it. Its structure is simple and compact, reducing component damage caused by mechanical wear and extending its service life.

To facilitate suction of a fluid object.SOLUTION: A fluid object can be sucked from a suction nozzle 11 of a suction passage part 10 connected to a tank 20 by an ejector 60 for evacuating the inside of the tank 20. A bottle 30 is connected through a tube 40 to a suction hose 12 that is connected to the suction nozzle 11. The bottle 30 stores a cleaning liquid for improving the fluidity of the fluid object. When the suction of the fluid object is started and the pressure in the suction hose 12 is lowered, the cleaning liquid in the bottle 30 flows into the suction hose 12 through the tube 40 and mixes with the fluid object in the suction hose 12. An inflow of the cleaning liquid changes according to the pressure change in the suction hose 12.SELECTED DRAWING: Figure 1

A looping water device has a container, a barrel body, an inlet pipe, and a switch valve. The container has a major tank and a vacuum tube. A water surface in the major tank approaches a datum plane. The vacuum tube is full of water. The barrel body contains air, is secured inside the major tank, and has a discharge port. The inlet pipe is connected to the barrel body and extends into the vacuum tube. The switch valve is connected between the inlet pipe and the barrel body. The air in the barrel body is compressed by water entering into the barrel body from the inlet pipe. When air pressure exceeds, the water in the barrel body is pushed into the major tank. A differential height between the water surfaces of the vacuum tube and the major tank is kept by the atmospheric pressure.

The present invention discloses a waste liquid discharge system for a chemiluminescence analyzer, comprising a negative pressure liquid extraction system connected to a cleaning container and a liquid drainage system connected to the negative pressure liquid extraction system. The present invention has the advantage of overcoming the technical defects of conventional positive pressure liquid extraction. During liquid extraction, a negative pressure system is established, and the negative pressure is used to quickly extract the waste liquid in the cleaning container into the waste liquid storage container. At the same time, the negative pressure energy storage container can also compensate for the negative pressure of the waste liquid storage container, further ensuring that the negative pressure system can extract the waste liquid in the cleaning container into the waste liquid storage container and the negative pressure energy storage container, thereby achieving rapid and complete extraction of the waste liquid, effectively preventing the outer wall of the sample needle from being stuck to the wall, further avoiding cross contamination, improving reliability, and thus improving equipment quality and the competitiveness of the product among its peers.