4896 results about "Inlet valve" patented technology

A valve timing control device includes: a unit for calculating a target valve timing for one of an intake valve and an exhaust valve in accordance with an operational state; a unit for detecting an actual valve timing of one of the intake valve and the exhaust valve; an actual valve timing control unit for generating a controlled variable for the VVT based on a difference between the target valve timing and the actual valve timing; a unit for learning a learning value of the controlled variable required for maintenance of the actual valve timing based on an integral correction value; and a unit for detecting a malfunction in a VVT from an amount of a shift in the actual valve timing when learning is not completed yet, and for detecting a malfunction in the VVT from the difference when learning is already completed.

The invention provides a full-automatic air compressor system integrating intelligent monitoring and fault diagnosis, and relates to the technical field of air compressor diagnosis. The management main system comprises an AI intelligent interaction module, an AR visual presentation module, a multi-source data fusion module, an intelligent diagnosis decision module, a fault prediction and prevention module, a user feedback learning module, an equipment linkage coordination module and a system core regulation and control unit. Operating parameters and microstructure change data of the air compressor are collected, and a high-precision comprehensive data vector is generated in cooperation with an algorithm based on tensor decomposition and generative adversarial network fusion. Compared with a traditional remote monitoring mode which depends on a single traditional sensor, the system can sense micro fault characteristics of a molecular level, and in cluster operation and maintenance of the air compressors in a factory, micro cracks of the air inlet valve are detected in advance, so that the problem of insufficient air pressure caused by delayed sensing is avoided.

A rain shower head including a first water outlet mechanism and a second water outlet mechanism. The first water outlet mechanism includes a water storage tank, a first water inlet pipe, a water inlet valve, a water discharge valve, and a control assembly. The second water outlet mechanism includes a second water outlet cavity and a second water inlet pipe. The first through holes of the first water outlet cavity of the first water outlet mechanism each has a cross-sectional area much greater than that of the second through holes of the second water outlet cavity of the second water outlet mechanism. The rain shower head features simple structure and convenience to use, and can achieve the basic showering function of a shower head and an instant large-water-volume showering experience, meeting the pursuit of young consumers for excitement.

The present invention belongs to the technical field of impact tests, and particularly relates to a catapult take-off and arrested impact test apparatus, comprising a supporting frame, an auxiliary supporting and guiding apparatus above the supporting frame, a mounting base below the supporting frame, a servo actuator, an oil circuit system, and a control and measurement system. The oil circuit system comprises an oil source, a low-pressure accumulator group, a high-pressure accumulator group, an oil inlet valve block, an oil return valve block, a servo valve block, an oil source low-pressure oil return pipe, an oil source high-pressure oil outlet pipe, and necessary tubes among components. The control and measurement system comprises a vibration and impact loading upper computer, a vibration impact controller, a static loading upper computer, a hydraulic servo controller, a servo valve, and an accelerometer. The servo actuator is internally provided with a displacement sensor. The present invention can be widely applied to conventional vibration and impact tests of various suspension launch apparatuses in a suspension-mounted state, as well as arrested impact tests under composite waveforms.

The invention proposes a foam dispensing system for a dispenser comprising a reservoir storing cosmetic product, said system comprising a product pump and an air pump, said product pump comprising a variable volume product metering chamber (13) defined at least partly by a deformable element (2), said system comprising at least five valves referred to as a product inlet valve for the product to enter toward the product metering chamber (13), a product outlet valve for the product to exit from the product metering chamber (13), an air inlet valve for the air to enter in an air metering chamber (14) of the air pump, an air outlet valve for the air to exit from the air metering chamber (14), an air return valve for the recovery of the air of the reservoir. The deformable element (2) comprises at least four flaps which are movable between a valve open state and a valve closed state.

A brake system for a motor vehicle having at least four hydraulically actuable wheel brakes includes a first structural unit (100), in which a first electrically actuable pressure source is arranged, a second structural unit, in which a second electrically actuable pressure source, an electrically actuable inlet valve per wheel brake, and an electrically actuable outlet valve per wheel brake is arranged, and a pressure medium reservoir. The first pressure source and the second pressure source are connected to a brake supply line, to which the at least four inlet valves are connected. The first structural unit and the second structural unit are connected to each other by at most one pressure-resistant hydraulic connecting element.

The invention belongs to the technical field of oil and gas exploitation and pressurized transportation, and discloses a lead screw driven rodless reciprocating type single-action electric submersible pump and a control method. The electric pump is characterized in that a working cavity is formed between a plunger and an upper working cavity end cover, and a lower cavity is formed between the plunger and a lower cavity end cover; the plunger does reciprocating motion in the working cavity to finish suction and discharge of liquid; the lower working cavity end cover is installed at the bottom of the cylinder body, and a lead screw is fixed to the lower working cavity end cover and connected with the plunger. The lead screw is connected with a motor. The plunger is driven by the lead screw to reciprocate in the cylinder body, and suction and discharge of liquid and control and continuous conveying of liquid in a working cavity are sequentially completed in the up-down stroke of the plunger by means of one-way opening and closing of the liquid inlet valve and the liquid discharge valve. The lead screw driving rodless reciprocating type single-action electric submersible pump is higher in efficiency under the complex well condition. The optimized reciprocating type driving mechanism can achieve efficient one-way conveying, the sealing design can prolong the service life of equipment, and the maintenance cost is reduced.

A fluid end for use with a power end. The fluid end comprises a plurality of fluid end sections positioned adjacent one another. Each section includes a single horizontally positioned bore. A plunger is installed within the bore and includes a fluid passageway. Low-pressure fluid enters the bore through the plunger and high-pressure fluid exits the fluid end through an outlet valve installed within the bore. The intake of low-pressure fluid within the fluid end section is regulated by an inlet valve installed within the plunger. Low-pressure fluid enters the plunger through an inlet component attached to both the plunger and an inlet manifold.

A device for testing gas tightness and internal gas flow performance of a low-temperature heat insulation module, comprising a gas inlet / liquid inlet module (200), a gas discharging / liquid discharging module (100), and a heat insulation module (1). The gas inlet / liquid inlet module (200) comprises an inner-layer space liquid nitrogen inlet valve (6), an outer-layer space liquid nitrogen inlet valve (13), a low-pressure pressure control module, an inner-layer space high-pressure pressure control module, an outer-layer space high-pressure pressure control module, a buffer tank (34), a pressure reducing valve (14), and a filter (35) which are connected by means of pipes. The gas discharging / liquid discharging module (100) comprises a liquid nitrogen / nitrogen gas discharging valve (3), an inner-layer space gas discharging valve (4), and an outer-layer space gas discharging valve (5) which are connected by means of pipes. An outlet of the gas inlet / liquid inlet module (200) is connected to an inlet of the heat insulation module (1), and an inlet of the gas discharging / liquid discharging module (100) is connected to an outlet of the heat insulation module (1). The device can achieve tightness inspection and adaptability research and testing and research of internal space gas flow performance of the heat insulation module (1) under a low-temperature working condition and a normal-temperature working condition.

The invention relates to a reciprocating piston pump (1, 1') with a pump housing (2) through which fluid flows and a pump axis (10), and an axially movable pump piston (19) through which fluid flows, arranged coaxially to two housing-fixed toroidal coils, namely a first toroidal coil (12') and a second toroidal coil (12''), wherein the reciprocating piston pump (1) has two inlet valves, namely a first inlet valve (20') and a second inlet valve (20''), and two outlet valves, namely a first outlet valve (21') and a second outlet valve (21''),wherein the first inlet valve (20') and the first outlet valve (21') are arranged concentrically to the pump axis (10) within the first annular coil (12') and the second inlet valve (20') and the second outlet valve (21') are arranged concentrically to the pump axis (10) within the second annular coil (12''), and the pump piston (19) is guided in a two-part guide sleeve or directly in the pump housing (2) in a two-part displacement chamber.

The invention discloses a two-section compression type transcritical carbon dioxide heat pump system and a control method thereof. An outlet of a second compressor sequentially passes through a high-temperature heat exchanger and a flow divider and then is divided into two paths; wherein one path is communicated with an inlet of a first expansion machine through a heat flow stream inlet valve of the first heat regenerator, the hot side of the first heat regenerator and the hot side of the second heat regenerator, and the other path is communicated with an inlet of a second expansion machine through a heat flow stream inlet valve of the third heat regenerator and the hot side of the third heat regenerator in sequence; the outlet of the second expansion machine is communicated with the inlet of the mixer through the cold side of the second heat regenerator, the cold stream inlet valve of the first heat regenerator and the cold side of the second heat regenerator in sequence; an outlet of the first expansion machine communicates with an inlet of the mixer through the low-temperature heat exchanger, a cold stream inlet valve of the third heat regenerator, the cold side of the third heat regenerator and the first compressor, an outlet of the mixer communicates with an inlet of the second compressor, and the comprehensive energy efficiency of the carbon dioxide heat pump system can be improved.

The present application belongs to the technical field of domestic water, and particularly relates to a passive differential pressure type pipe-in-pipe liquid outlet system. The system comprises a main pipe, a total water inlet valve, a plurality of branches, a differential pressure liquid inlet valve core, a plurality of differential pressure liquid outlet valve cores and a plurality of water outlet devices. When one or more of the branches are opened, due to the existence of the differential pressure liquid inlet valve core and the differential pressure liquid outlet valve core, a pressure difference is generated between the inner flow channel and the outer flow channel, the pressure of the inner flow channel is higher than that of the outer flow channel, so that in the remaining branches, the liquid in the inner flow channel can flow back to the outer flow channel through the liquid outlet end of the corresponding pipe, and finally flow out through the liquid outlet end of the pipe with the water outlet device opened. The internal water of all branches of the system can flow at any time, preventing the occurrence of dead water and deteriorated water.

The invention provides a shield tunnel ground surface settlement stress detection device and a pavement settlement treatment method, and relates to the technical field of shield tunnel construction. The detection device comprises a vertically arranged pipe body, the lower end of the pipe body is connected with a hollow elastic bag body, the upper end of the pipe body is connected with a water inlet pipe and an exhaust pipe, the water inlet pipe is provided with a pressure gauge and a water inlet valve, and the exhaust pipe is provided with an exhaust valve. According to the pavement settlement treatment method, an existing ground surface settlement detection mode is changed, measurement of the ground surface settlement amount is changed into measurement of the soil layer internal stress change amount, and a reliable basis is provided for pavement settlement treatment. According to the method, a ground surface settlement area and a soil layer stress reduction area can be quantitatively delineated according to the reduction amount of the water pressure of each elastic bag body, and then targeted grouting is performed, so that the soil layer stress is recovered to a stable and balanced state before tunnel excavation, and the problems of settlement and collapse of a paved pavement after a subway is opened are fundamentally solved.

The present invention provides a device for quantitatively collecting surface phytoplankton samples, comprising a sampling tube, wherein a bottom opening is provided at the bottom of the sampling tube, an annular baffle is provided on the inner side of the lower part of the sampling tube, an inlet valve is hinged on the baffle, a baffle is provided above the baffle, the inlet valve is connected to a float through a pull rope, the pull rope is passed through a hanging ring, the float is located above the baffle, a water outlet is provided on the lower side wall of the sampling tube, the water outlet is located above the baffle, a scale is provided on the side wall of the sampling tube, the starting end of the scale is flush with the center line of the water outlet, a side-permeable top cover is provided on the top of the sampling tube, a handle is provided above the side-permeable top cover, a float ring is detachably provided on the upper part of the outer wall of the sampling tube, and a counterweight is detachably provided on the lower part of the outer wall of the sampling tube; the sampling tube can be conveniently used for daily manual sample collection, and can also be applied to a buoy monitoring system, so that surface phytoplankton samples around the buoy body can be collected through auxiliary facilities, thereby improving the accuracy of the buoy monitoring system.

The utility model discloses a heat pump device and an air conditioning system, and relates to the technical field of heat exchange. The air conditioner comprises an outdoor assembly, an inner machine assembly, a liquid inlet valve group and a liquid outlet valve group. The liquid inlet of each outdoor assembly is communicated with the first liquid outlet of the inner unit assembly, and the liquid outlet of each outdoor assembly is communicated with the first liquid inlet of the inner unit assembly. And the liquid inlet valve group is communicated with the second liquid outlet of the inner machine assembly and the liquid inlet of each outdoor assembly. And the liquid outlet valve group is communicated with the second liquid inlet of the inner machine assembly and the liquid outlet of each outdoor assembly. Therefore, the conduction state of the liquid inlet valve set and the liquid outlet valve set can be adjusted through the refrigerating or heating mode of the indoor unit, and the function of independent refrigerating, independent heating or simultaneous refrigerating and heating in multiple areas can be achieved on the basis that a heat recovery module does not need to be additionally arranged. Therefore, the structural complexity of the heat pump device is reduced, and the product adaptability of the heat pump device is improved.

The invention discloses a compressor unit of a compressor station, a control method of the compressor unit, a medium and a program product, relates to the technical field of compressors, and aims to solve the problem of resource waste during test dragging of the compressor unit of the compressor station. The compressor unit of the compressor station comprises a compressor; an inlet valve; an outlet valve; one end of the inlet bypass pipeline is connected to one side of the inlet valve, and the other end of the inlet bypass pipeline is connected to the other side of the inlet valve; an inlet bypass valve is arranged on the inlet bypass pipeline; after the purging operation included in the warm-up mode is executed, the inlet bypass valve is controlled to be opened, the inlet valve is controlled to be closed, and the outlet valve is controlled to be closed, so that the compression pipeline is inflated through the inlet bypass valve; the compression pipeline is a pipeline between the inlet valve and the outlet valve; under the condition that the pressure of the compression pipeline reaches a first set pressure value, the warm-up operation included in the warm-up mode is executed; the first set pressure value is lower than a second set pressure value corresponding to the compression pipeline in the starting mode.

The invention relates to the field of water quality monitoring, in particular to a water area environment water quality on-line intelligent monitoring device and method, and the water area environment water quality on-line intelligent monitoring device comprises a shell, a defoaming mechanism and a monitoring mechanism; a water inlet and a water outlet are formed in the shell, and a water flow channel is formed in the shell; a water inlet valve is mounted at the water inlet; the defoaming mechanism comprises a negative pressure cylinder arranged in the shell and a piston assembly arranged in the negative pressure cylinder; the piston assembly moves upwards to suck the water flow channel to negative pressure, bubbles in water flow are promoted to be separated out, the pressure difference between the two sides of the water inlet valve is increased, and the water flow is promoted to enter the water flow channel through the water inlet valve. The opening threshold value of the water inlet valve is adjusted according to the gas amount in the water flow, so that new water flow enters from the water inlet valve when the piston assembly sucks the water flow channel till the absolute value of the negative pressure is large enough, and the separation effect of bubbles in the original water flow and the new water flow in the water flow channel is guaranteed. And the water quality monitoring accuracy of the monitoring mechanism is improved.

The invention discloses a dual-fuel engine combustion control method based on hydrogen-ammonia energy ratio and gas distribution overlap angle regulation and control, which comprises the following steps: 1) fuel ratio control: acquiring current operation state parameters of an engine, determining a target AER according to preset mapping, regulating ammonia gas supply quantity and hydrogen supply quantity to enable the actual AER to reach the target AER, and controlling the fuel ratio; the AER is adaptively set according to engine load and combustion stability conditions; 2) valve timing control: adjusting the opening time of an intake valve or the closing time of an exhaust valve through a variable valve timing mechanism so as to change a valve timing overlap angle VOA, wherein the VOA is set to be a negative value, a small overlap angle or a positive overlap angle according to the working condition of an engine; (3) injection time sequence optimization is conducted, specifically, the injection time of ammonia gas and the in-cylinder direct injection time of hydrogen are controlled respectively, and coordinated optimization of a fuel injection strategy and valve timing is achieved; and 4) closed-loop steady-state control: monitoring a combustion state and an emission index in real time, comparing the combustion state and the emission index with a threshold value to serve as a feedback signal, and correcting the target AER and VOA settings in time. According to the dual-fuel engine combustion control method based on regulation and control of the hydrogen-ammonia energy ratio and the gas distribution overlapping angle, the energy ratio of hydrogen fuel and ammonia fuel and the overlapping opening angle of an intake valve and an exhaust valve are dynamically adjusted under different working conditions, so that the combustion reaction rate and temperature are coordinated, and the stable and efficient combustion process is achieved; and harmful emissions of NOx, unburned ammonia and the like are obviously reduced.

The invention relates to the technical field of tannic acid waste liquid, and discloses a tannic acid production wastewater purification device which comprises a reaction cylinder, one side of the upper portion of the reaction cylinder is fixedly communicated with a liquid inlet pipe, the outer wall of the liquid inlet pipe is fixedly connected with a liquid inlet valve, the bottom of the reaction cylinder is fixedly communicated with a liquid outlet bin, and the outer wall of the liquid outlet bin is fixedly connected with a liquid outlet valve. A fixing frame is fixedly installed on the outer wall of the reaction cylinder, the top of the reaction cylinder is symmetrically and fixedly communicated with air outlet pipes, a liquid separation assembly is arranged in the reaction cylinder, a stirring assembly is arranged outside the liquid separation assembly, and chemicals are added into all areas in the reaction cylinder through the liquid separation assembly. The uniform distribution of the medicament can ensure that pollutants in the wastewater are in full contact with the medicament, the situation that the concentration of the local medicament is too high or too low is avoided, and the arranged stirring assembly is matched to ensure that the wastewater in the whole reaction cylinder can be effectively treated, so that the reaction effect is optimized, and the wastewater treatment quality is improved.

The invention relates to the technical field of unmanned aerial vehicle power systems, in particular to a low-altitude unmanned aerial vehicle hydrogen-electricity hybrid energy management system and control device.According to the low-altitude unmanned aerial vehicle hydrogen-electricity hybrid energy management system and control device, the residual hydrogen amount can be accurately quantified through combined collection and fusion calculation of hydrogen flow signals and air pressure signals; and the opening state of the proportional valve and the air inlet valve is adjusted in real time under data driving, so that the hydrogen input is matched with the actual power requirement, the voltage, the current and the temperature are synchronously monitored, and fluctuation feature extraction and life parameter calibration are performed on a power output sequence. The operation health degree and the life loss trend of the fuel cell can be dynamically obtained before power distribution, an accurate reference basis is provided for follow-up power allocation, the internal resistance change trend is measured and calculated through voltage and current sampling, and dynamic adjustment of the charge-discharge depth and charge-discharge process parameters is carried out in combination with the health degree. And the usability and the load capacity of the lithium battery are accurately represented.

What is suggested is a micromembrane pumping device for pumping a fluid, having: a pump chamber to which an inlet valve, an outlet valve, and a membrane device for varying a volume of the pump chamber are associated, wherein the membrane device has a plate-shaped actuator for deforming the membrane device; and influencing means for influencing the plate-shaped actuator and the volume of the pump chamber; wherein the membrane device has a plate-shaped membrane body limiting the pump chamber; wherein the plate-shaped actuator is arranged on a side of the plate-shaped membrane body facing away from the pump chamber; wherein the plate-shaped actuator is mounted to and electrically insulated from the plate-shaped membrane body by an electrically insulating glue layer; wherein at least one embedded portion of a support body at or in which a deformation sensor for detecting a deformation of the membrane device is arranged, is arranged within the glue layer to detect the volume of the pump chamber; wherein the influencing means, the plate-shaped actuator and the deformation sensor form a closed-loop control circuit for regulating a volume flow.

The invention relates to the technical field of power energy and ship resistance reduction, and discloses an internal combustion engine compressed air and electric supercharger ship bubble resistance reduction air supply control system which comprises an internal combustion engine set, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger, an electric supercharger and an electric supercharger, and the internal combustion engine set serves as a power source of the whole system and generates excessive compressed air by delaying the closing moment of an intake valve during conventional operation; the gas-liquid separator is arranged on one side of the internal combustion engine set and used for separating liquid impurities of the compressed air and discharging the liquid impurities regularly; the filter is arranged on the side, away from the internal combustion engine set, of the gas-liquid separator and used for further filtering the compressed air; the first gas storage tank is arranged on the side, away from the gas-liquid separator, of the filter. Compressed air of the internal combustion engine and exhaust gas of the internal combustion engine are used for replacing traditional independent air compression equipment, the effect of reducing the requirement for additional compression equipment is achieved, the problem that a traditional ship bubble drag reduction air supply system is high in energy consumption is solved, the energy utilization efficiency of ship operation is improved, and the overall energy consumption cost is reduced.

The invention discloses a molecular film type automotive nitrogen and oxygen separation device which comprises a turbocharger, a nitrogen and oxygen separator, a gas inlet valve, a gas outlet valve, a negative pressure pump and an electric control throttling valve. The turbocharger is driven by a turbine in an automobile turbocharger, so that the air is compressed to be conveyed to two paths of the nitrogen and oxygen separation device, the nitrogen and oxygen separation device can separate oxygen from the air, the air with high oxygen content is output, and the air is supplied to an engine for use through the gas outlet valve. The two paths of the nitrogen and oxygen separation device work alternately, when the temperature of the two paths of the nitrogen and oxygen separation device is too high to influence oxygen production efficiency, a main air inlet pipeline is opened to provide air normally by controlling the opening degree of the electric control throttling valve, and thus the phenomena of gas circuit plugging and engine stalling are avoided. According to the automotive nitrogen and oxygen separation device, the two branch paths work alternately, high concentration oxygen can be supplied to the engine continuously so that fuel can burn and act, and the burning utilization rate of the fuel is improved.

A method for determining a p-V characteristic of at least one wheel brake cylinder of a brake system of a vehicle. The method includes: increasing a pressure prevailing in the wheel brake cylinder during a measurement time interval, wherein a volume variable that reflects a present volume in the wheel brake cylinder, and a pressure variable that reflects a present pressure in the wheel brake cylinder, are determined at least once during the measurement time interval, and setting the p-V characteristic of the wheel brake cylinder taking into consideration the volume variable and the pressure variable. Before the measurement time interval, during a pressure increase interval, a pressure exerted on the closed wheel inlet valve and / or the closed isolating valve is increased with an average pressure build-up gradient greater than or equal to 50 bar / second up to a limit pressure of greater than or equal to 25 bar.

The invention relates to the technical field of cooling water abnormity monitoring, in particular to a steel slag pressure hot stuffy rolling cooling water abnormity alarm system and method.Roll gap cooling water flow, injection temperature, hot stuffy tank pressure and bearing vibration data are collected, a dynamic mapping relation between position coordinates of a spraying opening and a water inlet valve is established, temperature and pressure time sequence offset is calculated, and the temperature and pressure time sequence offset is calculated; the temperature judgment boundary is corrected by combining the pressure bearing limit value of the sealing ring and the real-time flow, and an abnormal alarm is triggered according to the temperature over-limit frequency in the continuous time period. A multi-source analysis framework is constructed by integrating temperature, flow, pressure and vibration parameters, single-point monitoring limitation is eliminated, nonlinear influence of the flow on tank pressure is quantified by adopting a dynamic weight model, a self-adaptive temperature threshold value is generated in combination with a sealing pressure bearing limit, dynamic coupling of an alarm mechanism is realized, an abnormal scene is positioned based on time sequence analysis and coordinate mapping, and the accuracy of monitoring is improved. The sealing hidden danger is pre-judged through the thermal unbalance coefficient, and the pressure rate deviation is intercepted in real time.

The utility model discloses a biological sample low-temperature preservation device. A freezing storage set and a rotating assembly are placed in a low-temperature storage cavity; the bottom of the lifting part is arranged at the top, located in the transition area, of the heat preservation tank body, a lifting assembly is arranged at the top of the lifting part, and a lifting part of the lifting assembly can sequentially penetrate through the heat preservation taking and placing part and the transition part and extend into the heat preservation part; the first liquid level sensor, the liquid inlet pipeline, the first temperature sensor and the second liquid level sensor are all located in the heat preservation tank body, the first liquid level sensor and the liquid inlet pipeline are both close to the lower surface of the rotating disc, the first temperature sensor is located on the peripheral wall face of the rotating disc, and the second liquid level sensor is located on the inner top of the heat preservation tank body. The liquid inlet valve is communicated with the liquid supplementing valve, the liquid supplementing valve is communicated with the liquid inlet pipeline, the exhaust valve is communicated between the liquid supplementing valve and the liquid inlet valve, and the exhaust valve is communicated with the vertical channel; the second temperature sensor is located in the cylinder. When the cryopreservation box is taken and placed, the cryopreservation box is in a low-temperature area of-80 DEG C to-170 DEG C, so that the biological sample is always in a protection state.

The invention provides a radiotherapy abdominal pressure plate device capable of monitoring abdominal external pressure in real time, and the device comprises a thermoplastic film which is provided with a fastener; the abdominal pressure plate body is fixedly connected to one side of the thermoplastic body film; the pressurizing air bags are distributed on the abdominal pressure plate in an array mode, air inlet valves are arranged on air inlet pipelines of the pressurizing air bags, exhaust valves are arranged on exhaust pipelines of the pressurizing air bags, and air pressure sensors are arranged in the pressurizing air bags; a thin film pressure sensor; the control module is used for judging whether the patient is in an inspiration phase or an expiration phase in real time according to numerical values detected by the multiple thin film pressure sensors, and controlling the air inlet valves or the exhaust valves on the corresponding pressurizing air bags to be opened so as to adjust radiotherapy pressure; and judging the pressure difference according to the detection values of the air pressure sensors on the two adjacent pressurizing air bags and carrying out cooperative compensation. By means of detection of the thin film pressure sensor and the air pressure sensor, the breathing phase is dynamically recognized, pressure is actively released in the inspiration phase, pressure is compensated in the expiration phase, and the displacement error of the target area can be controlled to be smaller than or equal to 2 mm.

The invention discloses an ionic liquid compressor, comprising: an end cap having an air inlet and an air outlet; the base is connected with the end cover and is provided with an air inlet cavity, an air outlet cavity and an airflow hole, the air inlet cavity is communicated with the air inlet, the air outlet cavity is communicated with the air outlet, the airflow hole is respectively communicated with the air inlet cavity and the air outlet cavity, an air inlet valve is arranged in the air inlet cavity, and an air outlet valve is arranged in the air outlet cavity; the air cylinder is connected with the base and is provided with a first cavity, and the first cavity is communicated with the airflow hole; the piston is arranged in the first cavity, and the circumferential direction of the piston is in sealing fit with the inner wall of the air cylinder; foam metal is arranged at one end, close to the airflow hole, of the piston, and the foam metal is immersed in the ionic liquid; the driving motor is arranged at the end, away from the airflow hole, of the piston and drives the piston to reciprocate. The overall performance and the operation stability of the ionic liquid compressor are improved.

The invention relates to a device for dispensing a liquid from a container, comprising: - an inlet channel configured to be brought in fluid communication with the container; - a pump in fluid communication with the inlet channel, the pump including a pump chamber and a piston reciprocally movable in the pump chamber; - an inlet valve arranged between the inlet channel and the pump; - a buffer in fluid communication with the pump; - a nozzle for dispensing the liquid, the nozzle in fluid communication with the pump and / or the buffer; - an outlet valve arranged between the pump and / or buffer and the nozzle; and - means for connecting the dispensing device to the container; wherein the buffer comprises an elastic buffer bag defining an expansible volume and extending at least partially past the connecting means towards an interior of the container. The invention further relates to a system for dispensing a liquid, comprising a container and a liquid dispensing device as described above connected thereto.

The invention provides a ventilation device for construction in a tunnel. The ventilation device comprises an air supply barrel, an air inlet barrel is rotationally arranged in one end of the air supply barrel, an air inlet valve is arranged at the end, away from the air supply barrel, of the air inlet barrel, the outer side of the air supply barrel is sleeved with a dehumidification box, and the air inlet barrel can be communicated with or disconnected from the dehumidification box; air inlet windows are arranged on the two sides of the dehumidification box. An evaporation assembly and a condenser are sequentially arranged in the dehumidification box and correspond to the air inlet windows. The evaporation assembly is provided with a supporting frame corresponding to the air inlet window, and dehumidification plates are evenly arranged in the supporting frame. A water removal mechanism for removing condensate water on the side surface of the dehumidification plate is arranged on the outer side of the dehumidification plate in a sliding manner; according to the ventilation device for construction in the tunnel, connection or disconnection of the air inlet barrel and the interior of the dehumidification box can be switched according to needs, so that the ventilation device has two ventilation modes of direct air supply and dehumidification air supply, the ventilation requirements under different external air conditions in non-tunnel construction are met, and the humidity in the tunnel is reduced.