152 results about "Pressure controlled ventilation" patented technology

The invention discloses a pressure-controlled drainage gas production method and system for a coal-bed gas well. The pressure-controlled drainage gas production method comprises the steps that drainage is conducted through the first daily drainage amount, wherein the first daily drainage amount meets the eliminating demand for production interference objects in a coal bed; and a pressure-supplementing medium is injected while drainage is conducted, and the downhole flow pressure daily drop amount is maintained as a first differential pressure value so as to avoid retracting and closing of pores and cracks in the coal bed. According to the pressure-controlled drainage gas production method for the coal-bed gas well, the drainage speed at the drainage state can be conveniently determined, the eliminating demands for drilling and completion fluids, pulverized coal and slack coal in the coal bed can be met, and meanwhile, retracting and closing of the pores and the cracks in the coal bed can also be avoided; and compared with the prior art, the pressure-controlled drainage gas production method is simple in process, the production efficiency of the coal-bed gas well can be greatly improved, and quite high practical value and popularization value are achieved.

A method and system for controlling the intake gas pressure of a ventilator, and a computer program product. The method comprises: acquiring a flow signal collected by a gas path flow sensor (101) and generating a collected flow function (S201); on the basis of the collected flow function, performing time domain signal reconstruction to generate a reconstructed signal (S203); on the basis of the reconstructed signal and a pressure signal collected by a pressure sensor (105), obtaining an estimated patient end pressure signal (S205); and on the basis of the estimated patient end pressure signal serving as a feedback signal for intake gas pressure closed-loop regulation, controlling the rotation speed of a fan (103) (S207). The collected flow signal undergoes time domain signal reconstruction to obtain the real-time flow reconstructed signal, so as to implement phase compensation of the collected signal, thereby implementing pressure control having a good tracking effect, and reducing device development costs.

This invention proposes an integrated vacuum pumping system for the exterior of a vacuum evaporation machine, comprising a coarse pumping pipe and a fine pumping pipe. A first three-way pipe and the fine pumping pipe are connected by a telescopic motor that drives the valve cover to rise and fall, enabling rapid switching between the coarse and fine pumping lines and avoiding vacuum fluctuations. Under the precise pressure control of the telescopic motor, the valve cover maintains uniform contact pressure on the sealing surface. The transition pipe directly connects the coarse and fine pumping pipes, eliminating flow channel redundancy in traditional multi-valve systems and reducing gas flow resistance. The telescopic motor is linked with a vacuum sensor to automatically switch the pumping mode based on the cavity pressure threshold, avoiding errors caused by manual intervention. The integrated three-way pipe reduces external connecting components, shrinks the equipment size, and lowers manufacturing costs and maintenance complexity.

This invention discloses a pressure control device, method, and system for the coexistence of different types of full-containment tanks. It includes: multiple full-containment tanks, each equipped with a first pressure sensor, and each full-containment tank connected to an input pipe via a valve group; each full-containment tank is connected to a flare and an output pipe, with a first control valve between the flare and the full-containment tank; the first control valve and valve group of each full-containment tank are respectively connected to a controller, which controls the opening and closing of the first control valve and valve group; two full-containment tanks with different design pressures share a single output pipe, and a pressure protection system is installed on the output pipe between the two full-containment tanks. The pressure protection system includes at least one first shut-off valve and a second pressure sensor connected to the controller; in response to a trigger signal from the second pressure sensor, the controller controls the opening and closing of the first shut-off valve. This allows for the simultaneous operation of full-containment tanks with different design pressures while ensuring the safe and stable operation of the station.

This application relates to a continuous positive airway pressure (CPAP) device and a method for controlling ventilation pressure. The minimum operating pressure is determined by acquiring a preset treatment pressure and a target pressure drop. The device monitors the patient's respiratory phase transitions in real time and employs different pressure regulation strategies for the inspiratory and expiratory phases. During the inspiratory phase, the ventilation pressure is smoothly adjusted from the preset treatment pressure to the minimum operating pressure and maintained to reduce inspiratory effort. During the expiratory phase, the ventilation pressure is gradually increased from the minimum operating pressure to ensure that the ventilation pressure returns to the preset treatment pressure at the end of the expiratory phase, maintaining airway support and avoiding the risks of airway closure and central apnea. This application improves patient comfort during CPAP therapy, enhances treatment compliance, and simultaneously ensures airway support while reducing the risks of airway closure and central apnea.

The application relates to the technical field of rehabilitation, in particular to an upper limb rehabilitation training device which comprises a sleeve, an air bag fixedly connected to the inner side of the sleeve, an air pump communicated with the air bag, fixed ends and movable ends respectively at the two ends of the sleeve, a box body fixedly connected to the outer side of the fixed end of the sleeve, a receiving cavity and a control cavity separated by a partition plate in the box body, a receiving opening formed in the side wall of the receiving cavity, a motor fixedly connected to the inner side wall of the receiving cavity, a reel coaxially fixedly connected to the output shaft of the motor, a connecting rod fixedly connected to the side wall of the reel, and the movable end of the sleeve fixedly connected to the side wall of the connecting rod; a controller arranged in the control cavity, and a probe assembly embedded in the inner side of the sleeve. The sleeve is automatically wound and unwound to replace the traditional magic tape fixing, the air bag pressure is automatically adjusted in cooperation with the controller, the probe assembly is integrated to realize real-time monitoring of arterial blood flow, the problems of traditional pressurized sleeves, such as complicated wearing, easy hooking and displacement, and low pressure control precision, are solved, and the single-person convenient wearing, stable and accurate blood flow restriction training is realized.

The utility model relates to safe pressure control valve technical field discloses a safe pressure control valve, including valve body, the valve body outer wall fixedly connected with the air outlet pipe, the air outlet pipe outer wall is provided with dustproof subassembly, the valve body bottom fixedly connected with the air inlet pipe, the air inlet pipe outer wall is provided with quick release subassembly, quick release subassembly includes the ball, the ball outer wall sets up in the air inlet pipe outer wall, the fixed hole is seted up in the air inlet pipe inside, the ball outer wall sliding connection is in the fixed hole inner wall, the air inlet pipe outer wall sliding connection has the connecting pipe, the ball outer wall sliding connection is in the connecting pipe inner wall, in the utility model, through the downward movement slider to remove the location of ball, subsequently through the ball moves out the fixed hole inside and removes the fixing of air inlet pipe, avoid safety valve and pipeline usually adopt flange bolt connection, welding or thread connection, when disassembling need to loosen bolt, clean sealing surface or cutting pipeline gradually.

The application discloses a kind of adjustable bang-bang pressure reducing structure of supply gas capacity, belong to gas pressure control technical field.The structure includes gas source, electromagnetic valve group, valve small gas capacity and buffer tank, valve small gas capacity is the cavity structure of variable volume, its shell interior includes first cavity and second cavity by passage intercommunication, channel is inserted and connected adjusting rod, spring is arranged between adjusting rod and first cavity cavity wall, adjusting rod can be moved along passage axial direction by the volume of adjusting rod extending into second cavity to adjust the volume of second cavity, gas source is communicated with first cavity, first electromagnetic valve is connected first cavity and second cavity by pipeline, second cavity is connected with buffer tank by second electromagnetic valve.When gas source pressure changes, adjusting rod moves under the action of pressure difference and spring force, realize the automatic adjustment of gas capacity.The application can automatically adjust supply gas capacity according to gas source pressure change, improve the stability and response speed of pressure control, prolong the service life of electromagnetic valve.

The utility model belongs to air conditioning technical field, concretely relates to a kind of inspection filling device for air conditioner circulation pipeline, including high pressure circulation pipe and low pressure circulation pipe, high pressure circulation pipe and low pressure circulation pipe are all equipped with three-way connector, the free pipe end of three-way connector is welded with vertical direct pipe of intercommunication, pressure control valve is installed on vertical direct pipe, bending pipe is installed on pressure control valve, and pressure gauge is installed in the lower free end of bending pipe, the free side of three-way connector is equipped with filling control valve.The utility model is by the pressure gauge of being set in the lower side of high pressure circulation pipe and low pressure circulation pipe, to intuitively monitor the high-low voltage state of refrigerant pipeline in room, it is convenient to judge and supplement refrigerant in time.Meanwhile, the filling control valve on three-way connector is not only closed by protection component, but also can be conveniently disassembled to control filling control valve, and refrigerant filling operation is carried out to circulation pipeline on indoor side, significantly improve operation safety.

The application discloses a three-way pressure reducing valve and a flushing method, a hydraulic balance system and a system flushing method, and relates to the technical field of fluid equipment maintenance. The three-way pressure reducing valve comprises a pilot valve, a flushing pipeline, a ball valve, a first compression spring and a first spring cavity; and a main valve, the main valve comprising a main valve body, a second compression spring, a second spring cavity and a control valve core, the main valve body being provided with a first pipeline, a second pipeline, an oil return pipeline and an oil discharge pipeline; when the pressure of the second pipeline reaches between a first pressure value and a second pressure value, the ball valve is pushed open, and the pressure of the second pipeline is divided by the oil discharge pipeline; when the pressure of the second pipeline exceeds the first pressure value and the second pressure value, the ball valve is pushed open, the head of the control valve core moves left to compress the second compression spring, the control shoulder moves left, and the pressure of the second pipeline is divided by the oil discharge pipeline and the oil return pipeline. The three-way pressure reducing valve can make the pressure control of the second pipeline more stable.

The invention relates to a system configuration for regulating the minimum pressure of an ORC system. By regulating the minimum pressure, the efficiency can be optimally adapted to the ambient conditions.

This invention discloses an intelligent tourniquet individualized pressure determination and closed-loop pressure control system and method under conditions of thick clothing in pre-hospital emergency care. The system includes an intelligent tourniquet execution terminal, a thick clothing status confirmation module, a limb pattern recognition module, a parameter acquisition module, a basic KTP prediction module, a thick clothing pressure transmission correction module, a thick clothing target pressure calculation module, and a closed-loop pressure control module. The system confirms the thick clothing status through multi-parameter weighted judgment, distinguishes between upper and lower limbs and calls the corresponding KTP correction models, uses correction coefficients to quantify and compensate the basic tissue filling coefficient, calculates the individualized target pressure, and stabilizes the pressure in a closed loop. This invention effectively solves the problem of insufficient hemostasis caused by pressure transmission attenuation under thick clothing conditions, achieving precise pressure control of "one person, one pressure; one limb, one pressure," and can be quickly activated without removing thick clothing, making it suitable for complex scenarios such as pre-hospital emergency care and cold-weather rescue.

This invention relates to a constant pressure control system for an optical cavity based on pump-valve coordination and water immersion sensing, and its active protection method. Belonging to the fields of precision instrument control and industrial automation, the system integrates an electronically controlled proportional valve and an air pump through a pump-valve coordinated pressure control unit. It dynamically adjusts the intake and exhaust flow rates based on an adaptive PID algorithm and a coordinated allocation function, achieving high-precision, rapid, bidirectional adjustment of the optical cavity pressure. Simultaneously, it employs a dual environmental sensing unit including visual perception and capacitive liquid level sensing, which executes constant pressure control and active anti-intrusion monitoring in parallel through an intelligent coordinated control unit. When visual detection identifies a risk of water intrusion, the system proactively limits the pump speed; when the capacitive sensor detects liquid water intrusion, it immediately executes an emergency shutdown. This solves the problem of difficulty in coordinating pressure control and safety assurance in traditional technologies, achieving a unified approach of long-term precise constant pressure and active contamination protection, significantly improving the system's reliability, safety, and intelligence level under complex operating conditions.

The utility model discloses a kind of deuterium water distillation preparation devices, belong to deuterium water distillation technical field, comprising: retort, the bottom of retort is fixedly connected with heating layer;Multi-stage pressure control mechanism, be in retort, to, the pressure control in retort, multi-stage pressure control mechanism includes inner tank ring, outer tank ring, two groups of through-hole and pressure control pump.The deuterium water distillation preparation device, by the use of multi-stage pressure control mechanism, can control the pressure inside retort gradually reduce, using boiling point difference amplification effect, the relative volatility of H2O and D2O is improved from 1.01 to 1.05, significantly reduce energy consumption, improve use effect, the deuterium water distillation preparation device, by the use of control mechanism, can operate multi-stage pressure control mechanism to use, and, the whole structure is simple, use same structure, control first sealing ring and second sealing ring respectively rotating, complete closed use, improve flexibility in use process.

This invention discloses a hand restraint system suitable for patients with delirium, comprising an outer sleeve shell, a protective layer, and a pressure control and monitoring system. The pressure control and monitoring system is disposed within the outer sleeve shell and is communicatively connected to a central monitoring system located at the nurses' station. This invention effectively combines the outer sleeve shell, the protective layer, and the pressure control and monitoring system to not only effectively fix the wrist of a delirium patient but also significantly improve the comfort of the fixation, making operation more convenient. Furthermore, it allows for real-time monitoring of the restraint force on the delirium patient's wrist. When abnormalities in the restraint force occur, medical staff can promptly detect and take appropriate action, greatly facilitating hand restraint procedures for delirium patients.

The utility model discloses a multifunctional water pumping mechanism with diaphragm pump, including diaphragm pump still includes water pumping mechanism, is equipped with the water inlet, the water outlet on water pumping mechanism, is equipped with the first water passing cavity in water pumping mechanism, is equipped with the pressure control component of adjusting the water pressure in the first water passing cavity on the water route of first water passing cavity and water inlet intercommunication, is equipped with the flow control component on the water route of first water passing cavity and diaphragm pump's water inlet intercommunication, is equipped with flow component on the water route of diaphragm pump and water outlet intercommunication. The utility model discloses have the function of adjusting the water pressure of incoming water, output flow regulation and flow measurement simultaneously, realize the function of multi -functional cooperation, and it is more favorable in the application in the drinking water system.

The application relates to an elephant trunk continuous body mechanical arm which comprises a mounting base plate, a control device and bellows, the bellows are arranged in a plurality of arrays around the center circumference of the mounting base plate, form a driving section, any bellows is provided with an air pressure control assembly for controlling the air pressure in the bellows, a first positioning adjusting assembly for controlling the spacing between the bellows is arranged between the mounting base plate and one end of the plurality of bellows close to the mounting base plate, a plurality of driving sections are sequentially arranged along the array axis of the bellows, a second positioning adjusting assembly is further arranged between any two adjacent driving sections, an execution assembly is arranged at the end of the last driving section away from the mounting base plate, and a third positioning adjusting assembly is further arranged between the last driving section and the execution assembly; and the application further relates to a driving control method of the elephant trunk continuous body mechanical arm. The application has the effects of reducing local deviation and structural interference, improving bending continuity, posture stability and end execution precision.

This invention relates to the field of micro hyperbaric oxygen chamber technology, and discloses a data acquisition, monitoring, analysis, and control system for micro hyperbaric oxygen chambers, including: a multi-dimensional sensing module, a digital twin computing module, an adaptive pressure control module, and an active safety defense module. The system acquires multimodal data in real time through physical biosensors and visual devices, constructs a digital twin model using deep learning algorithms, and calculates physiological tolerance. Based on the physiological tolerance, it calls a nonlinear pressure boosting control model, automatically executing adaptive callbacks and dynamic pressure stabilization during pressure boosting to construct a physiological adaptation window. Simultaneously, by calculating a comprehensive risk index, it uses dual logic to determine whether the user is in a sleep or abnormal state, thereby executing wake-up and emergency pressure relief strategies. This invention solves the problem of eardrum damage caused by traditional linear pressure boosting and effectively avoids false alarms and missed alarms in safety monitoring, improving the comfort and safety of equipment operation.

The utility model discloses nitrogen gas spring support of limit structure, specifically relates to nitrogen gas spring technical field, including cylinder, bottom plate, air inlet and exhaust pipe, support rod, top cover, jacking assembly and limit component, and jacking assembly realizes support and reset function through piston, plug rod etc. and nitrogen gas cooperation in cylinder, and guide rod and top cover guide hole cooperation guarantee movement stability, and limit component can carry out accurate location to the height of jacking assembly's rise and drop through electric push rod drive lifting plate and limit disc, and set up pressure -relief valve and one -way inflation valve on air inlet and exhaust pipe, guarantee safety and be convenient for maintenance. The utility model discloses through limit component and air pressure control, effectively promoted nitrogen gas spring support's safety, stability and limit precision, avoid cylinder burst and object collision risk, be applicable to the mechanical scene of needing accurate support and location.

This disclosure discloses an isolation device for insolating aerosol exposure, which may be used as an isolation device for a test with a biological aerosol exposure infection risk. The isolation device for insolating aerosol exposure of the present disclosure includes a cabin body; protective half suit arranged in the cabin body; a working table arranged at an accessible horizontal position of the protective half suit in the cabin body; and an air inlet device and an air exhaust device arranged on a side wall of the cabin body. By using the support structure of the cabin body and the rigid frame, flexible assembling and disassembling of the isolation device and easiness in transportation are realized; and based on design mechanisms of negative pressure control, airtight isolation and high-level personnel protection, physical isolation of high-risk operations is realized, operation personnel is effectively protected, and environmental pollution is prevented.

The application discloses a pre-hospital emergency intelligent tourniquet individualized pressure determination and closed-loop pressure control system and method. The system comprises an intelligent tourniquet execution terminal, a limb mode recognition, a thin clothing condition confirmation, a parameter collection, a typing KTP prediction, an initial target pressure calculation, a feedback correction, a target pressure locking and a closed-loop pressure control module, and is also equipped with a safety protection, a time sequence control, a voice interaction and a data recording module. The method first recognizes the upper limb or lower limb hemostasis mode, determines the thin clothing condition through low pressure exploration and pressurization, collects the limb girth, systolic pressure, physiological feedback and real-time pressure parameters, calculates the tissue filling coefficient KTP and the initial target pressure, and locks the final target pressure after the physiological feedback correction. The application can realize the upper and lower limb typing individualized precise pressure control, adapt to the thin clothing emergency scene, is simple and easy to operate, safe and stable in hemostasis, and is suitable for pre-hospital trauma emergency rapid hemostasis.

A patient interface includes a mask body, an elbow, a connector and a conduit. Any one or more of the mask body, the elbow, the connector and the conduit includes a bias flow vent. The bias flow vent is configured to deform with the application of pressure but not fully collapse such that an orifice size defined by the bias flow vent can vary with the application of pressure.

1. Name of the product in this design: High-frequency pneumatic valve (BV310-2F). 2. Application of this design: a high-frequency pneumatic valve used for position or pressure control in hydraulic applications, or a combination of solenoid valve and manual emergency operation. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The utility model relates to the field of air suspension, concretely relates to an air suspension gas path system, contains air compression unit, air spring unit, low pressure control unit, high pressure control unit and the gas storage unit that constitutes by double -cavity gas holder, double -cavity gas holder contains low pressure chamber and high pressure chamber, realizes high low pressure gas zoning storage, and when high pressure chamber fails, low pressure chamber can work as spare chamber and continue to work, and through specific venting pipeline connection and control valve cooperation between each unit, can realize multiple gas path control, and the air suspension gas path system pressure is accurately regulated, the utility model discloses through the redundancy design of double -cavity gas holder and promotes the reliability of whole system, utilizes closed -loop gas circulation and further reduces energy consumption, and with the pressure monitoring of multi -valve combination realizes accurate control, forms whole chain safety mechanism, solves traditional system gas storage single, pressure control inflexible, low reliability etc.

The utility model discloses a cavity structure of positive and negative pressure switching, including cavity main part, vacuum ball valve module, first pipe line, second pipe line and the confluence seat, this cavity structure still includes the vacuum metering subassembly, the electric control pressure control subassembly, the positive pressure ball valve subassembly and the pressure relief valve subassembly all with the connection of confluence seat, vacuum ball valve module and the first mounting hole's junction is provided with the first sealing ring, the confluence seat is connected between first pipe line and second pipe line and is fixed to the cavity main part outside through the connecting plate side, and the internal chamber of confluence seat is communicated with the cavity main part, and vacuum metering subassembly is used for measuring the vacuum size of confluence seat inside, and the electric control pressure control subassembly is used for controlling the air pressure size of confluence seat inside. The utility model can realize big pressure difference and low vacuum work, accurate control pressure, quick response pressure switch, satisfy VR product display pasting to positive and negative pressure switching high efficiency, accurate demand, improve product quality and production efficiency.

The utility model relates to the technical field of separation membrane performance test, specifically is a kind of separation membrane gas permeability testing device of constant pressure variable volume method. Including test upper cavity and test lower cavity, test upper cavity includes upper air chamber and surrounds the upper temperature control water jacket of being arranged outside upper air chamber, test lower cavity includes lower air chamber and surrounds the lower temperature control water jacket of being arranged outside lower air chamber, and upper temperature control water jacket and lower temperature control water jacket are all connected with the temperature control mechanism of keeping the temperature constant of upper air chamber and lower air chamber;Pressure detection device and pressure control device for keeping the constant pressure of upper air chamber are equipped on the gas inlet line of upper air chamber, and flow control device is equipped on the gas outlet line of upper air chamber;Flowmeter and gas analyzer are equipped on the gas outlet line of lower air chamber.The utility model can avoid the error introduced in the prior art product, the test gas permeating separation membrane needs carrier gas to be carried to gas analyzer, and the concentration, proportion of multicomponent test gas can be stabilized.

A kind of adjustable distance vacuum suction tool jig with high pick-and-place operation efficiency and stable product adsorption, comprising support, position adjusting assembly, adsorption assembly and air pressure control assembly, the support includes horizontal arm, fixed horizontal arm vertically fixed on the horizontal arm and multiple movable horizontal arms, multiple sliding grooves are arranged on the horizontal arm on both sides of the fixed horizontal arm, and each movable horizontal arm is correspondingly slidably embedded in each sliding groove;The position adjusting assembly includes multiple air cylinders, and each air cylinder piston rod is one-to-one connected with each movable horizontal arm;The adsorption assembly includes a first vacuum chuck arranged below the fixed horizontal arm and a second vacuum chuck arranged below each movable horizontal arm;The air pressure control assembly includes a first solenoid valve, a second solenoid valve and a vacuum generator fixed on the horizontal arm, the first solenoid valve is connected with the vacuum generator and controls the on-off of each air cylinder and the vacuum generator, and the second solenoid valve is connected with the vacuum generator and controls the on-off of the first vacuum chuck and the second vacuum chuck and the vacuum generator.

This invention provides a hydrophobic structure, including a connecting pipe connected to a flash tank, a pressure control valve, and a discharge silencer. The connecting pipe includes a receiving section, a throttling section, and a drainage section connected in sequence. The throttling section has an orifice plate connected to the end of the receiving section. The drainage section extends away from the orifice plate and includes a condensation section and a water outlet section arranged parallel to each other, and a water storage section connecting the condensation section and the water outlet section. The high end of the condensation section is connected to the orifice plate, and the water storage section is connected to the low ends of both the condensation section and the water outlet section. The length of the water outlet section is shorter than the length of the condensation section. This invention solves the problem that existing hydrophobic structures cannot effectively drain accumulated water.