220 results about "Pressure generation" patented technology

The invention discloses a pressure sensor zero drift compensation method and system for a high-voltage direct-current converter valve cooling system, and relates to the technical field of monitoring and calibration of high-voltage direct-current transmission equipment. The method comprises the following steps: constructing a multi-factor coupling drift model taking temperature, vibration frequency and electromagnetic interference intensity as inputs; environment parameters and pressure signals are collected in real time, and reference pressure signals are collected regularly; short-term dynamic compensation is realized based on model prediction and reference deviation correction; updating the model through incremental learning according to the drift trend; and real-time monitoring and abnormal early warning are carried out. The system comprises a multi-parameter acquisition unit, a data processing unit, a reference pressure generation unit and a communication unit. According to the method, shutdown calibration is not needed, the compensation precision is improved by 75% or above, the calibration period is prolonged to 12 months, meanwhile, the method has the abnormal diagnosis and standby compensation functions, measurement continuity is guaranteed, compatibility is high, industrial popularization is easy, and the method is particularly suitable for being used in a complex environment.

The application is suitable for the field of advanced manufacturing of powder materials, and provides a flash sintering equipment for large current and large pressure, which comprises a power supply module, a pressure generation module, a support frame, a high vacuum module, a jacking module, a sintering unit and a conveying module. The sintering unit is provided with a sintering platform, a floating mold module and a floating lower punch module, and is guided by upper and lower guide columns; the jacking module jacks up the lower electrode through a lead screw, pushes the floating lower punch module and the floating mold module to move upwards along the guide column to separate from the platform, and realizes floating butt joint; the pressure generation module drives the upper punch to press downwards through the upper electrode and applies pressure to the sample, and the power supply module simultaneously applies sintering current. Through the design of the floating mold module connected in a non-rigid manner, the application avoids the transmission of the pressing force to the sintering platform, prevents the equipment from overturning, and improves the stability of the sintering process; and the combination of the conveying module realizes the overall station switching of the sintering unit, and improves the continuous automatic production capacity of the equipment.

A gate valve according to the present invention is configured to partition a flow path. The gate valve has a valve box, a valve body, a rotary shaft, a rotation drive unit, a pressing drive unit, a driving pressure generation mechanism, and an energy regeneration mechanism. The rotation drive unit is capable of rotationally driving the valve body. The pressing drive unit is provided in the valve box. The pressing drive unit moves the valve body, in a direction along the flow path, from a valve-opening covering position to a valve closing position at which the valve body contacts the peripheral edge portion, and presses the valve body. The driving pressure generation mechanism is connected to the pressing drive unit and is capable of causing the pressing drive unit to expand and contract. The energy regeneration mechanism regenerates drive energy for valve operation.

Described herein is a respiratory care apparatus capable of performing multitude of therapy for secretion management and breath assistance therapy. The respiratory care apparatus comprises an electromechanical air router assembly (EARA) and an interfacing assembly. The EARA includes independent first and second pressure generating sources for assisted inhalation / insufflation and assisted exhalation / exsufflation process. The interfacing assembly includes a patient interface port and a patient interface tube. The interfacing assembly forms two pneumatically separate paths. The respiratory care apparatus is configured to generate alternate positive and negative pressure at the patient interface port for assisted inhalation / insufflation and assisted exhalation / exsufflation processes respectively. The assisted inhalation / insufflation and assisted exhalation / exsufflation processes are carried out independently through separate conduits / passages to reduce contamination and infection. Further, the respiratory care apparatus comprises a garment which oscillates due to alternate positive and negative pressure generation and provides therapy to the patient.

The application provides a piling device, which comprises a water hammer bin, a pressure generating assembly and a gas generator replacing device, the pressure generating assembly comprises a pressure chamber, a gas guide structure and a gas generator, the gas guide structure is fixed to the side wall of the pressure chamber and communicates with the pressure chamber, the gas generator comprises a plurality of components for loading gas generating agent, the gas generator replacing device comprises a gas generating agent conveyor and a mechanical arm, wherein the gas generating agent conveyor is used for conveying the components loaded with the gas generating agent from one side close to the workboat end to one side close to the mechanical arm, and conveying the components in a second use state from one side close to the mechanical arm to one side close to the workboat end, and the mechanical arm is used for fixedly connecting the components in a first use state with the gas guide structure, and transferring the components in the second use state from the gas guide structure to the gas generating agent conveyor; the piling device provided by the application can realize automatic installation or dismounting of the gas generator.

A substrate processing device according to the present invention includes a holding unit having, on a suction surface for suctioning a substrate, a circular central region and an annular outer region arranged outside the central region. A plurality of zones are set on the suction surface, the plurality of zones being in the central region and in regions obtained by dividing the outer region in the circumferential direction. The substrate processing device includes a pressure generation unit which generates pressure in each of the plurality of zones. In a state in which the substrate is mounted on the suction surface and in which negative pressure is applied to at least one of the plurality of zones, the pressure generation unit applies positive pressure to at least one of the plurality of zones to which negative pressure is not applied.

The pipeline pressure blocking operation multi-degree-of-freedom hydraulic manipulator device and method of the present application belongs to the pipeline repair and pressure blocking technical field, comprising: setting pressure blocking execution device, wherein the pressure blocking execution device comprises a main feeding rod and a blocking head at the end of the main feeding rod, and an embedded fine adjustment mechanism is connected between the blocking head and the main feeding rod, and the scheme adopts the parallel connection configuration of high-strength flexible hinge and micro hydraulic cylinder; the high-strength flexible hinge has very high rigidity in the axial direction, can withstand the huge axial thrust generated by the medium pressure up to 25 MPa or above, and ensures that the blocking head is not pushed back; at the same time, by using the incompressibility of hydraulic oil, the system can still realize the fine adjustment of ± 3 degrees to ± 5 degrees of pitch and yaw while maintaining high pressure bearing capacity through the coordinated action of the hydraulic cylinder, solving the pain points of easy self-locking and difficult adjustment under high pressure.

The invention relates to a real-time intelligent pressure monitoring scar diagnosis and treatment device and system. The device comprises a pressure generation device, a rigid structure matched with the pressure generation device in shape and a flexible touch sensor located in the rigid structure. The inner layer of the flexible touch sensor is provided with a flexible conductive contact array, and the outer layer of the flexible touch sensor is provided with a flexible integrated electrode array. According to the device, the local pressure borne by the pathological scar is accurately measured at the micro-nano scale, adjustment can be carried out in real time according to the stress condition, treatment of the pathological scar is facilitated, pressure research on the pathological scar is also facilitated, the pathogenesis of the pathological scar is clarified, and the device has good application prospects.

The invention provides a high-pressure gas membrane rupture pressure measuring device and a measuring method thereof, and belongs to the technical field of pressure measurement. The measuring device comprises a pressure generation system, a gas compression system, a gas injection system, a pressure measuring system and a diaphragm clamping system. The piston divides the cavity into a hydraulic cavity and a gas compression cavity, and the piston is hydraulically driven to compress the pre-filled gas, so that the diaphragm is broken. The pressure measurement system records pressure-time data in real time, and a sliding window average algorithm is adopted to extract a membrane rupture pressure peak value. According to the technical scheme, inert gas is used, initiating explosive devices are not used, membrane rupture energy is only gas expansion, the protection box can absorb fragments, and explosion-proof transformation is not needed in a laboratory. And the smoothed unique membrane rupture pressure value is output through a sliding window averaging algorithm, and manual reading errors are eliminated. According to the technical scheme, the device is compact in structure, safe to operate, rapid in testing and suitable for accurately measuring the diaphragm rupture pressure of the gas gun diaphragm in a conventional laboratory.

The application belongs to the technical field of microfluidics, and particularly relates to a detection substrate and a preparation method thereof and a microfluidic chip. The detection substrate is used for a microfluidic chip. The microfluidic chip comprises a driving substrate arranged opposite to the detection substrate. The detection substrate is located below the driving substrate. The detection substrate comprises a substrate, a pressure transmission structure and a detection unit. The pressure transmission structure is arranged on the substrate. The detection unit is arranged between the substrate and the pressure transmission structure and is used for generating an electrical parameter change in response to external pressure. When a liquid drop is located between the driving substrate and the detection substrate, the gravity of the liquid drop is transmitted to the detection unit through the pressure transmission structure, so that the electrical parameter change of the detection unit is caused to determine the position of the liquid drop. The application can realize accurate detection of the position of the liquid drop by causing the electrical parameter change through the gravity of the liquid drop.

This application relates to a hydraulic brake cylinder pressure control system and its control method. The control system includes a pressure generation module and a pressure control module. The pressure generation module includes a check valve, an external accumulator, and an accumulator sensor. The check valve is connected to an oil tank. The pressure control module includes a proportional solenoid valve connected to the external accumulator and the brake cylinder; a pressure-holding solenoid valve located at the overflow port of the proportional solenoid valve, which is connected to the oil tank via the pressure-holding solenoid valve; a brake cylinder sensor collecting and outputting the brake cylinder pressure; and a brake cylinder pressure switch electrically connected to the brake cylinder sensor. During the relief condition, the proportional solenoid valve is de-energized and the pressure-holding solenoid valve is energized. During coasting or braking conditions, the proportional solenoid valve is energized, and the pressure-holding solenoid valve is de-energized after a delay. This application reduces the usage rate of the proportional solenoid valve and improves system reliability through the coordinated control of the proportional solenoid valve and the pressure-holding solenoid valve.

The invention relates to a tool holder comprising a housing (2) which can be fixed on a carrier device of a machining tool. A shaft (5) is rotatably supported in the housing (2), which shaft has a tool receptacle (6) at a front end (5a) and a drive interface (9) at a rear end (5b), which can be driven by a drive transmission of the carrier device. The tool receptacle (6) has, at a contact area (11) against which a connection area (7a) of a tool (7) to be clamped can lie, a pressure chamber (12) which is concentrically formed with respect to the shaft axis and which can be filled with a pressure medium. The pressure chamber (12) is connected in the shaft (5) by a pressure medium connection (13) to a pressure generation device (14). The pressure generation device (14) is arranged in a front end region of the shaft (5). The tool holder (1) is simple in construction and is particularly suitable for clamping driven tools (7) which are rarely exchanged.

A pair of sliding members sliding relative to each other at sliding faces (S) is configured such that at least one of the sliding faces (S) includes a negative pressure generation mechanism (21) separated from a leakage side by a leakage-side land portion (R2) and a land portion (26) arranged in the negative pressure generation mechanism (21). In the compact sliding members, sliding torque can be reduced and a sealing function can be maintained.

The invention discloses a lithium battery negative pressure formation system and method, a storage medium and electronic equipment. The negative pressure formation system comprises a plurality of negative pressure cups, a gas-liquid separator, a detection assembly, a negative pressure generation device and a controller. Each negative pressure cup is provided with a first opening and a second opening, and the first openings of the plurality of negative pressure cups are used for being communicated with liquid injection ports of a plurality of batteries; the gas-liquid separator is provided with a third opening and a fourth opening, and the third opening is respectively communicated with the plurality of second openings; the detection assembly is provided with a fifth opening and a sixth opening, the fifth opening is communicated with the fourth opening, and the detection assembly is used for obtaining the gas production rate of the plurality of batteries; the negative pressure generating device is communicated with the sixth opening; the controller is in signal connection with the detection assembly and the negative pressure generation device and used for determining a negative pressure value corresponding to the gas production rate according to the received gas production rate obtained by the detection assembly and controlling the negative pressure generation device to generate the corresponding negative pressure value.

The present invention diagnoses the presence or absence of an abnormality in a sensor for detecting the fluid level position of brake fluid in a reservoir. A brake system 20 comprises: a first flow path group G1 connected to a master cylinder 42; and a second flow path group G2 connected to a wheel cylinder 44. A connection state of the brake system 20 can be switched between a first state in which the first flow path group G1 and the second flow path group G2 are disconnected and a second state in which the first flow path group G1 and the second flow path group G2 are connected. The brake system 20 comprises: a pressure generation unit 66 that controls the pressure of brake fluid in the wheel cylinder 44 in the first state; and a sensor that detects the fluid level position of the brake fluid in a reservoir 43 attached to the master cylinder 42. The control device comprises: a control unit that executes fluid level control to raise the fluid level by using the pressure generation unit 66; and a diagnosis unit that diagnoses the presence or absence of an abnormality in the sensor on the basis of a detection result from the sensor during execution of the fluid level control.

The invention discloses a portable controllable negative pressure drainage flushing device. Relates to the technical field of medical instrument flushing and comprises a shell, and a control unit and a portable fixing module are arranged on the shell; the negative pressure generation module comprises a negative pressure pump, a pressure gauge and a flow regulating valve; the flushing fluid storage module comprises a flushing container, a micro peristaltic pump and an adjusting knob, the flushing container is connected with the flushing head through a flushing pipeline, the micro peristaltic pump is arranged in the flushing container and communicated with the flushing pipeline, and the adjusting knob is arranged on the support and is in signal connection with the micro peristaltic pump; the drainage collection module comprises a storage container and a pressure buffer cavity, the storage container is arranged on the side wall of the shell, the top cover extends into the shell through a pipeline to be communicated with the negative pressure pump, an absorption connector is arranged on the storage container, and a drainage pipeline is arranged on the absorption connector. According to the portable controllable negative pressure drainage flushing device, the portable fixing module is arranged, so that the activity space of a patient is thoroughly liberated, and the patient can get out of bed in the early stage after an operation.

There is provided a sliding component disposed at a relative rotational location of a rotating machine to slide relative to another sliding component. The sliding component has a sliding surface provided with a fluid inlet groove communicating with at least one of a sealed fluid side space and a leakage side space and a dynamic pressure generation groove communicating with the fluid inlet groove and extending in a circumferential direction. Both side edges and a terminating end edge of the dynamic pressure generation groove are curvedly continuous with each other in a plan view.

The invention provides a method for permanently changing the structure and improving the performance of a semiconductor material treated by pressure and the semiconductor material treated by the method, specifically, the time effect on pressure is considered in specific modification of the semiconductor material, and the specific method comprises the following steps: putting the semiconductor material into a pressure generation system, and when certain high pressure is generated, starting the pressure generation system; and maintaining the high pressure for a certain time, releasing the pressure to normal pressure, and recording the structure and performance changes of the semiconductor material at different moments under different pressures, so as to obtain the optimal pressure processing parameters for optimizing the structure and performance of the semiconductor material. Wherein maintaining at high pressure for a certain time is the core of the method. The semiconductor material modified by the method can be applied to actual devices, and the method has certain universality. According to the invention, a semiconductor material organic-inorganic hybrid perovskite is taken as an example, and the effect of a pressure treatment method on the structure, the performance and the stability of the perovskite is specifically introduced.

The invention provides an atomic force microscope probe pickup device, and belongs to the technical field of atomic force microscopes. The atomic force microscope probe pickup device comprises a cylindrical main body which is provided with a cavity, and one end of the cylindrical main body is provided with an adsorption port; the suction nozzle is detachably arranged at the adsorption opening and is used for adsorbing the atomic force microscope probe; the negative pressure generation module is arranged in the cavity and used for generating negative pressure in the area between the adsorption opening and the negative pressure generation module, the negative pressure generation module comprises a cantilever beam structure and a flexible sealing layer, the cantilever beam structure comprises a plurality of piezoelectric cantilever beams arranged around the inner wall of the cavity, a slit is formed between every two adjacent piezoelectric cantilever beams, and the flexible sealing layer is arranged in the cavity. The flexible sealing layer is arranged on the side, close to the adsorption opening, of the cantilever beam structure and covers the slit. And the control circuit is arranged in the cavity and is used for driving the cantilever beam structure to deform. According to the invention, high precision and good reliability of replacement of the AFM probe can be ensured, and the efficiency of replacement of the AFM probe can be improved.

The invention provides a pump, a chemical supply unit, and a substrate processing apparatus. A pump according to an embodiment of the present disclosure comprises: a housing having a pressure space formed therein; a pressurizing member connected to the pressure space through a pressurizing line; and a plurality of pipes provided in the pressure space and contracting when the pressurizing member supplies a pressure generating fluid to the pressure space through the pressurizing line.

The invention discloses a high-precision pressure transmitter based on SOI (Silicon On Insulator) silicon piezoresistive sensing, which comprises a silicon piezoresistive pressure sensor and a micro sensing signal detection and transmission software and hardware system, and is characterized in that the micro sensing signal detection and transmission software and hardware system comprises a detection circuit, an external AD (Analog to Digital) conversion circuit, an operational amplifier circuit and a filter circuit; the micro sensing signal detection and transmission software and hardware system collects current signals generated when the SOI silicon piezoresistive pressure sensitive chip encounters pressure, and detection, amplification, filtering and AD conversion of response signals of the pressure sensitive chip are completed by using a precise detection circuit, an efficient filtering algorithm and detection software. The system has the following advantages: low power consumption: by optimizing the circuit design and selecting low-power-consumption components, the overall power consumption of the system is reduced; high sensitivity: through a precise amplification circuit and high-precision A / D conversion, precise detection of microvolt-level signals is realized; anti-interference: noise and external interference are effectively suppressed by comprehensively applying hardware filtering and software filtering technologies, and long-term stability: the measurement precision is kept at + / -0.05% F.S. / year under long-term operation of the system.

The utility model belongs to the technical field of tobacco shred processing, and discloses a wind power shred feeding air inlet valve and a rotary drum type shred feeder. The wind power inlet door comprises a fixed door plate and a movable door plate, the fixed door plate is arranged on the wire feeding pipeline and provided with multiple rows of first through holes, and the first through holes in each row are formed in the second direction at intervals; the movable door plate and the fixed door plate are in sliding fit in the first direction, the movable door plate is provided with multiple rows of second through holes, each row of second through holes are formed at intervals in the first direction, and the multiple rows of first through holes and the multiple rows of second through holes are formed in a staggered mode in the second direction. According to the wind power shred feeding air inlet valve and the rotary drum type shred feeder, during air inlet, the blocking effect on tobacco shreds is enhanced, the tobacco shreds are prevented from leaking out and entering a negative pressure generation piece, stable work of a negative pressure system is ensured, and meanwhile tobacco shred loss is reduced.

The invention discloses a massage structure and a massage device. The massage structure comprises a negative pressure generation assembly, a first chamber and an air path control assembly. The negative pressure generating assembly is provided with an air inlet and an air outlet. The first cavity is provided with at least one first opening making contact with a to-be-massaged part. The gas path control assembly communicates with the gas inlet, the gas outlet and the first cavity, the gas path control assembly controls the first cavity and the negative pressure generation assembly to be connected and disconnected so as to form a gas inlet channel between the first cavity and the negative pressure generation assembly, and the negative pressure generation assembly enables the first opening to generate negative pressure through the gas inlet channel; the first opening performs a first massage action on the to-be-massaged part; the air path control assembly controls the first cavity and the negative pressure generation assembly to be connected and disconnected so as to form an air outlet channel between the first cavity and the negative pressure generation assembly, and the negative pressure generation assembly enables the first opening to generate normal pressure or positive pressure through the air outlet channel so that the first opening can conduct second massage on the to-be-massaged part. Compared with the prior art, the use experience of the user is enriched.

The invention relates to the technical field of medical instruments, in particular to an intelligent sputum suction device for the pneumology department, which comprises a shell, and a sputum suction execution module, a negative pressure generation module and a control module are mounted on the shell; the sputum suction execution module comprises a double-cavity sputum suction tube, a telescopic driving assembly capable of automatically adjusting the insertion depth and a sensing unit used for monitoring the sputum state, the double-cavity sputum suction tube comprises a negative pressure channel and an atomization channel, one end of the negative pressure channel is communicated with the negative pressure generation module, and a multi-point negative pressure suction port is formed in the other end of the negative pressure channel; one end of the atomization channel communicates with a gas-liquid mixing cavity, and the gas-liquid mixing cavity is installed in the shell. The control module is electrically connected with the sensing unit of the sputum suction execution module, the telescopic driving assembly and the negative pressure generation module. The control module dynamically adjusts the negative pressure intensity of the negative pressure generation module and the moving path of the double-cavity sputum suction tube according to sputum state data fed back by the sensing unit. The device is used for reducing the risk of cross infection and airway injury, and meets the clinical requirements of different groups of patients.

The utility model relates to the technical field of civil engineering, in particular to a structure for actively controlling vertical displacement of a pipeline or a building foundation, which comprises a steel pipe cross beam and a hydraulic jack, the two ends of the hydraulic jack penetrate into working wells on the two sides of the existing pipeline or the building structure, and the hydraulic jack is arranged in the working wells and supports the steel pipe cross beam. The utility model has the advantages that the force transmission path is clear, and the stress system is definite; the substrate pressure in a certain space can be reduced, an isolation effect is generated, and implementation of other projects below the substrate is facilitated.

This invention relates to the field of medical device technology and discloses a positive and negative pressure airway clearing system and method based on high-speed switching of a single turbine. The processing module receives feedback signals from sensing components and compares these signals with preset target pressure or flow parameters to generate electronic control signals. The control unit is configured to output electronic control signals to the electric turbine fan via a drive module. This design significantly reduces the complexity, size, weight, and manufacturing cost of the equipment by using a single high-performance turbine fan instead of the traditional dual-turbine and complex valve system. The pressure generation unit and control unit work together to achieve millisecond-level switching of the electric turbine fan's operating state, enabling rapid and smooth alternation of positive and negative pressure, thereby generating a highly efficient pressure waveform that closely resembles that of a physiological cough.

A negative pressure generation device (10) comprises: an intake flow path (20); a compressed air flow path (36) that surrounds the periphery of the intake flow path (20); an exhaust flow path (52) that is provided downstream of the intake flow path (20) and the compressed air flow path (36); and a supply flow path (14a) that supplies compressed air to the compressed air flow path (36). A first center line (B) of the supply flow path (14a) is connected to the compressed air flow path (36) in a direction that does not intersect a central axial line (C).

The invention relates to the technical field of textile equipment, in particular to an anti-winding type residual thread active extracting and shearing device for thread ball bobbin case treatment, which comprises a suction pretreatment pipe, a negative pressure generation box, a thread drafting mechanism and a fusing separation module. The full-closed-loop pretreatment of catching, straightening, shearing and removing is achieved on a bobbin case transfer path, and the problems that due to the fact that follow-up blowing cleaning is relied on traditionally, remaining threads wind mechanical parts, an airflow channel is blocked, and equipment shutdown faults are caused due to incomplete treatment are effectively solved.

The invention discloses trachea fixing equipment capable of preventing recessive aspiration. The trachea fixing equipment comprises a negative pressure generation assembly, a trachea fixing main body, a side edge fixing frame, a trachea body and a bottom adsorption pipe. The invention belongs to the technical field of air pipe fixing equipment, and provides a negative pressure generating assembly, a communicating supporting piece made of a water-soluble paper material cannot limit stretching and retracting of an auxiliary spring through a supporting framework after being dissolved, the auxiliary spring can drive a piston rod and a piston piece to move upwards through a top limiting piece, and negative pressure is generated in a negative pressure generating container; negative pressure is formed at the opening of the bottom of the bottom adsorption tube, hidden blockages enter the negative pressure generation container through the bottom adsorption tube, and the hidden blockages can be discharged and cleaned through the drainage tube, so that a series of complete operations of cleaning and adsorption are realized, hidden aspiration of critical patients in unconscious states and the like is effectively prevented, and the operation efficiency is improved. And automatic experience can be provided.

The fully-embedded self-driven interstitial fluid collecting type dilator comprises a dilation bag, an interstitial fluid filtering bag is arranged on the left side of the dilation bag, the interstitial fluid filtering bag is of an oblate sphere structure after being deformed, and the bag wall is a micropore dialysis filter membrane; a liquid inlet in the left end of the expansion bag is communicated with a liquid outlet in the right end of the interstitial fluid filtering bag through a liquid guide pipe, a valve control mechanism is arranged in the middle of the liquid guide pipe, and a negative pressure generating mechanism used for generating negative pressure in the interstitial fluid filtering bag is arranged in the middle of the liquid guide pipe; according to the full-embedded self-driven tissue fluid collection type expander, the built-in semi-permeable negative pressure generation mechanism is used for collecting and filtering tissue fluid, the tissue fluid is controllably pumped into the expansion bag through the valve control mechanism, and the self-expansion extrusion pump or the electric suction pump can be selected as the negative pressure generation mechanism. Safe expansion which does not need external puncture water injection, does not depend on external energy, is controllable in expansion speed and can quickly release pressure in an emergency state is achieved.