254 results about "Pneumatic pressure" patented technology

The invention relates to a displacement and pneumatic pressure synchronous measurement method and system, an external trigger system triggers a multi-channel dynamic signal data acquisition system and a pressure scanning valve to synchronously start measurement, and the pressure scanning valve and a laser displacement meter can synchronously measure the pressure and displacement of all pressure measurement points; the pressure scanning valve and the single-channel piezoresistive differential pressure sensor can synchronously measure pressure information of a reference pressure measuring point, and the pressure information serves as accurate basic signal reference data. Time difference calculation is carried out on pressure signals of a reference pressure measuring point measured by the single-channel piezoresistive differential pressure transducer and the pressure scanning valve through a cross-correlation method and a manual alignment method, so that time sequence alignment is carried out on a displacement signal measured by the laser displacement meter and a pneumatic pressure signal measured by the pressure scanning valve. The time difference of the measured signals is calculated accurately, the signal time sequence consistency can be remarkably improved, the accuracy of a final result obtained through synchronous measurement is higher, and more reliable data support is provided for subsequent vibration analysis.

The disclosure relates to a leak detection system for a pneumatic braking system of a vehicle. The pneumatic braking system has a control unit, a pneumatic circuit, and an air tank configured to supply pneumatic pressure to the pneumatic circuit. The pneumatic circuit has a plurality of valves configured to be individually controlled by the control unit. The link detection system includes program code configured, when executed by a processor, to individually control the valves of the pneumatic circuit so as to isolate a sub-circuit of the pneumatic circuit. The leak detection module is configured to monitor a pressure in the pneumatic circuit for leaks, wherein the leak detection module detects a leak in the sub-circuit if the pressure decreases while the sub-circuit is isolated.

A pneumatic gauge and pressure control device includes a pneumatic gauge that is manually movable from a neutral position to: (i) a fill position for compressed air to flow from a compressed air source into a system; or (ii) a vent position for compressed air to be vented from the system. The pneumatic gauge can rotate or slide from the neutral position to the fill and vent positions. A method for controlling a flow of compressed air with respect to a pneumatic system includes manually moving a pneumatic pressure gauge from a neutral position to a fill position to cause compressed air to be communicated from an associated compressed air source into the pneumatic system and / or moving the pneumatic gauge from the neutral position or from the fill position to a vent position to cause compressed air to be vented from the pneumatic system.

The invention provides a force direction feedback system and method of pneumatic pressure. The system generates a first oscillation signal changing along with air pressure and a second oscillation signal with fixed frequency through a signal conversion module; and the counter counts the cycles of the two paths of oscillation signals. The back noise calibration module samples environment back noise by using a second oscillation signal in a frequency division manner, and eliminates back noise interference in a force count value through a subtractor, so that the problem of detection deviation caused by environment air pressure fluctuation is solved; and the dual-threshold comparison module screens the difference signal through a back noise threshold and an anti-shake threshold, generates a force conversion value, and avoids error output caused by slight fluctuation and shake. The differential operation module processes the force conversion value in combination with the second oscillation signal, the accurate pneumatic force value is output through signal correlation, the pneumatic direction can be distinguished by means of comparison with the fixed reference, and finally accurate and stable feedback of the pneumatic pressure force and direction is achieved.

The invention discloses a construction method for a shield tunneling machine to penetrate through an upper-soft and lower-hard stratum. The construction method comprises the following steps that S1, piles are reinforced; s2, tunneling of the shield tunneling machine: the shield tunneling machine determines the tunneling mileage of the shield tunneling machine according to the position coordinates of the reinforcing body, and a soil bin at the front end of the shield tunneling machine is enabled to assist in crossing through an upper-soft lower-hard stratum area by adopting an air pressure and slurry mode; the shield tunneling machine stops when tunneling to the center position of one reinforcing body, a worker enters a soil bin to detect and replace a tool under the condition that the soil bin is under pressure, the cavity position of a stratum between two adjacent rows of reinforcing bodies which just pass through is determined according to the slag falling condition in the tunneling process of the shield tunneling machine, the top of the cavity position is stabilized through a drilling and injecting all-in-one machine, and the drilling and injecting all-in-one machine is used for drilling and injecting the drilling and injecting all-in-one machine. Then the shield tunneling machine continues to conduct tunneling; s3, grouting and stabilizing; and S4, grouting and filling. According to the construction method for the shield tunneling machine to penetrate through the upper-soft and lower-hard stratum, time is reasonably utilized, the whole working procedure is reasonable in design, and construction efficiency is improved while construction safety is guaranteed.

An electro-pneumatic central pressure control module, having at least two channels, implemented as a structural unit for an electro-pneumatic service brake of a vehicle, having at least two pressure control channels which are electrically controllable with regard to a brake pressure. A central electronic brake control device has a board, carrying electrical and electronic components, in which routines at least for controlling the brake pressure and for controlling the driving dynamics are implemented in the electrical and electronic components. At least one inertial sensor is arranged on or at the at least one board and is electrically conductively connected to at least several of the electrical and electronic components on the board so that the output signals of the at least one inertial sensor are integrated into the at least several electrical and electronic components for carrying out the control of the driving dynamics.

The utility model discloses a pressure regulating valve with a pneumatic pressure sensing assembly, which belongs to the technical field of pressure regulating valves and comprises an inlet valve body and an outlet valve body, an inlet flow channel is arranged at the front end of the inlet valve body, a protruding arc throttling port is arranged at the tail end of the inlet flow channel, and an outlet flow channel is arranged at the rear end of the outlet valve body. A movable seat is arranged on the inner side of the inlet valve body, a fixed seat is arranged on the inner side of the outlet valve body, the center of the side, away from the fixed seat, of the movable seat is connected with a lifting valve element, the lifting valve element extends to the inlet flow channel and is fixedly connected with a valve seat in the inlet flow channel, and an inflation structure is arranged between the fixed seat and the movable seat. And the fixed seat and the movable seat are connected at the edge of the outer ring through a corrugated pipe. Through the movable base and the fixed base which are connected through the corrugated pipe, the size of the throttling opening is accurately adjusted, and balance control over the pressure of an outlet runner is achieved.

A microfluidic plate is described herein comprising a pneumatic manifold with a plurality of pneumatic channels for receiving gas under pneumatic pressure, a fluidic manifold with a plurality of fluid channels for receiving a fluid, a flexible membrane located between the pneumatic and fluidic manifolds and at least one fluid pump formed by the pneumatic channels, fluid channels and diaphragm membrane. The fluid pump includes at least first, second and third sequential valve chambers formed by corresponding portions in a pneumatic channel. A microfluidic system and a fluid pump for use in a microfluidic device are also described herein.

The equidistant cutting equipment for the aluminum turning parts comprises a supporting mechanism and an equidistant cutting mechanism, the supporting mechanism comprises an attaching bottom plate supported on the ground, a supporting shock pad is installed in the middle of the top end of the attaching bottom plate, and an L-shaped supporting clamp is installed on the surface of the top of the supporting shock pad; the equidistant cutting mechanism is installed on the side of the top end of the L-shaped supporting clamp, damping is achieved through the attaching bottom plate and one end of the supporting damping pad, lifting of the corresponding aluminum turning part is achieved through the buffering support, and then one end of the follow-up corresponding aluminum turning part can move front and back conveniently. One end of the cylinder body of the pneumatic pressure cylinder moves back and forth to realize equidistant detection, and one end of the telescopic clamping sleeve is adopted to realize equidistant cutting.

The invention provides a PPR pipe pneumatic cutting-off and hot melting combined machining table, and belongs to the field of PPR pipe cutting machining equipment.The PPR pipe pneumatic cutting-off and hot melting combined machining table comprises a machining table support, a pulley guide rail, a sliding block, a pneumatic cutting device, a foot switch and a PPR hot melting machine, the pulley guide rail and the pneumatic cutting device are both arranged on the machining table support, and the pneumatic cutting device is arranged on the side edge of one end of the pulley guide rail; the sliding block is clamped on the pulley guide rail, the foot switch is arranged on the side edge of the bottom of the machining table support and connected with the pneumatic cutting device, and the PPR fuse machine is arranged on the machining table support. The process from PPR pipe cutting to hot melting is completed on the machining table, procedure connection is formed, line production is achieved, the PPR pipe machining efficiency is greatly improved, the machining and manufacturing time is saved, a graduated scale is arranged, a guide rail and a sliding block are matched to accurately control the blanking length, only the end of the PPR pipe needs to be aligned with the sliding block, repeated measurement is not needed, a pneumatic press is adopted for cutting, and the machining efficiency is greatly improved. And the effects of saving energy and improving efficiency are achieved.

In seeding machines, a tank for storing compressed air is unnecessary, allowing for a smaller size. [Solution] The seed planter 10 is a device that propels seeds S from a nozzle 11 using pneumatic pressure. The seed planter 10 includes a drive source 12, a loading unit 14 having a holding unit 21 for positioning and holding seeds S, and a launching unit 13 that generates pneumatic pressure using the power of the drive source 12 to propel the seeds S from the holding unit 21 from the nozzle 11.

The utility model provides a pneumatic pressure stabilizing device and an automatic wrapping film wrapping device for box-packed filter sticks, and belongs to the technical field of mechanical equipment. The pneumatic pressure stabilizing device comprises an air cylinder, a positioning rod, a stabilizing pressure plate and a rotating mechanism. The air cylinder is connected into a mounting hole in the upper end of the fixing piece through a first connecting piece, the positioning rod is connected into the mounting hole in the upper end of the fixing piece through a first connecting piece, a knuckle bearing is arranged in the center of the stable pressing disc, and a second connecting piece matched with the knuckle bearing is arranged on the knuckle bearing. The lower end of the fixing piece is connected with the stable pressing disc through a second connecting piece, and the rotating mechanism is arranged on the ground. Compared with the prior art, the problems that in the prior art, due to the effect of centrifugal force, an upper-layer small box and a supporting plate on the upper portion of the small box are prone to displacement, packaging quality is reduced, and products are damaged are solved.

A biomechanical testing system includes a reactor module, a storage unit and a pneumatic pressure source. The reactor module includes an upper board, a lower board, a positioning board disposed between and cooperating with the upper and lower boards to define an airtight space, a position-limiting member received in the airtight space, and at least one biological culture material positioned in the airtight space by the position-limiting member. The storage unit is adapted to supply a liquid to the airtight space. The pneumatic pressure source is controllable to supply gas to the storage unit so as to drive the liquid to flow from the storage unit into the airtight space and through the at least one biological culture material.

The invention relates to the technical field of overflow valves, in particular to a high-low double-pressure pneumatic pressurizing large-flow overflow valve which comprises an overflow valve body, an overflow valve element, an overflow valve sleeve, a pressure adjusting rod and an air cylinder. The overflow valve element is arranged in the overflow valve body in a sliding mode, and the pressure adjusting rod is located in the overflow valve sleeve and sleeved with a pressure adjusting lock nut; the air cylinder is in threaded connection with the upper end of the overflow valve sleeve and is fixed through a set screw, a pressurizing piston is arranged in the air cylinder, a pressurizing spring is arranged at the upper end of the pressurizing piston, an air inlet cover is arranged at the upper end of the pressurizing spring, and an air inlet connector is arranged at the upper end of the air inlet cover. According to the high-low double-pressure pneumatic pressurizing large-flow overflow valve, when a terminal client transports heavy loads, the overflow valve is used in cooperation with a pressurizing switch to complete system pressurizing, and goods are smoothly unloaded without depending on other auxiliary methods.

A peritoneal dialysis system includes a cycler having a pneumatic valve manifold or pneumatic arrangement, an air pump positioned and arranged to supply pneumatic pressure to the pneumatic valve manifold with or without intervening pneumatic storage, a pneumatic pressure sensor positioned and arranged to detect pneumatic pressure, and a control unit configured to use an output of the pressure sensor as feedback to adjust the air pump according to a set pneumatic pressure; and a disposable set including a pod pump having a flexible sheet, one side of the flexible sheet positioned and arranged during operation to receive pneumatic pressure via the air pump and pneumatic valve manifold.

The application discloses a kind of engine cooling fan assembly strength calculation method based on one-way fluid-solid coupling, comprising: the geometric model of cooling fan assembly is established;Utilize the finite element model of cooling fan assembly and external flow field generated by mesh division software;In structural analysis software, respectively, to cooling fan and fan support plate is endowed with material mechanics characteristics, and boundary condition is set;In computational fluid dynamics software, set the turbulence model and boundary condition of external flow field;Blade surface is set as fluid-solid coupling surface, first solve flow field using computational fluid dynamics software, pass blade surface pressure in calculation result to finite element software by interpolation, and finite element software is used as boundary condition to simulate and analyze the structural strength of cooling fan assembly, and obtain cooling fan assembly strength.The application improves the accuracy of the model and ensures the calculation efficiency by taking the aerodynamic pressure load on the blade as the boundary condition when predicting the structural strength of the cooling fan.

This utility model discloses a pneumatic pressure balancing device for laser shutters, belonging to the field of laser shutters. This pneumatic pressure balancing device connects a flexible hose to a hollow connector through a through-hole in the outer wall of the laser shutter housing. This isolates the internal chamber of the housing from the external environment. While achieving chamber sealing, the hose can adaptively expand or contract based on its elasticity, achieving internal and external pressure balance. This pneumatic pressure balancing device also has the advantages of simple structure, low cost, and small footprint.

The utility model belongs to the technical field of buffer tanks, and particularly relates to an adhesive finished product buffer tank. A tank body; the stirring assembly is divided into a motor part and a stirring part; the liquid inlet pipeline is arranged at the upper part of the tank body and is used for injecting liquid into the tank; the liquid outlet pipeline is arranged at the lower part of the tank body and is used for discharging liquid in the tank to the outside; the air pressure balance valve is mounted on the tank body through the connecting hole of the upper end cover and keeps the air pressure in the tank body balanced; the radar liquid level monitor is arranged on the upper end cover of the tank body and is used for monitoring the liquid level of liquid in the tank; the valves are arranged on the liquid inlet pipeline and the liquid outlet pipeline. The conical stirring part driven by the speed reduction motor is matched with the multiple sets of connecting rods and connecting blocks, the flowing characteristics of the high-viscosity adhesive can be adapted, meanwhile, the situation that the molecular structure of the adhesive is damaged due to too large local shearing force is avoided, the adhesive is evenly stressed through the stirring assembly, layering of the adhesive is avoided, and it is ensured that the product performance is stable in the temporary storage process.

The application discloses a delay starting device and a pneumatic supercharger. The delay starting device comprises a pilot control valve, a first pilot gas path and a second pilot gas path. The pilot control valve is connected with the first pilot gas path, the second pilot gas path and a pilot control gas path of a switching valve in the pneumatic supercharger respectively. The first pilot gas path is communicated with an input end of the pneumatic supercharger, and the second pilot gas path is communicated with an output end of the pneumatic supercharger. A valve core of the pilot control valve moves according to a pressure difference between the first pilot gas path and the second pilot gas path, so as to turn on or turn off the pilot control gas path connected with the pilot control valve. The pilot control gas path is used for controlling the switching of the switching valve in the turned-on state, so as to realize the switching of the working position of the switching valve. Through the delay starting device, the high-frequency switching of the pneumatic supercharger in the starting stage can be avoided, the service life of the pneumatic supercharger is improved, useless work of the pneumatic supercharger is reduced, and input flow is saved.

The invention relates to the technical field of jigs, and discloses an automatic sealing pneumatic pressure maintaining jig capable of preventing gas leakage, the automatic sealing pneumatic pressure maintaining jig comprises a base, a rotating arm and a lower punch, the rotating arm is rotatably connected to the surface of the base, the lower punch is rotatably connected to the end, away from the base, of the rotating arm, and a gas path connector is fixedly connected to the middle of the rotating arm; a fixing assembly used for fixing the gas leakage prevention jig is arranged on the gas circuit connector, a wrapping assembly used for preventing gas leakage is arranged on the gas circuit connector, an electric telescopic rod is electrically controlled by a gas pressure controller to stretch out and draw back to drive a second wrapping clamp to wrap an external gas pipe, and the gas leakage position is sealed through the electric telescopic rod and the second wrapping clamp. Gas loss and environmental pollution can be reduced, meanwhile, safety accidents such as fire disasters, explosion and poisoning caused by gas leakage are avoided, then serious threats to safety of factories and operators are avoided, the risk of the accidents can be reduced by sealing the gas leakage position, and harm to the factories and the operators is avoided.

The utility model discloses a pneumatic pressure adjusting mechanism for a closed scraper of a flexographic press and the scraper, which belong to the technical field of scrapers and comprise a scraper mechanism, a pneumatic pressure adjusting mechanism and a pneumatic pressure adjusting mechanism, the supporting mechanism comprises a supporting seat and a sliding block device connected with the supporting seat in a sliding mode, and the sliding block device comprises a connecting part used for blocking the knife cavity; the pressure adjusting mechanism is used for driving the sliding block device to be connected to the supporting base in a sliding mode, the pressure adjusting mechanism comprises an adjusting piece, and the adjusting key is used for controlling the distance, close to the cutter cavity, of the connecting part or the distance, away from the cutter cavity, of the connecting part. By changing the adjusting part of the pressure adjusting mechanism and controlling the distance between the connecting part and the cutter cavity or the distance between the connecting part and the cutter cavity, the adjusting part can achieve accurate adjustment, so that the pressure in the cutter cavity is adjusted, and the defects that in the prior art, the air pressure of equipment is not stable and cannot be accurately controlled are overcome.

This utility model discloses a cylinder self-locking mechanism and a vacuum cover device for food processing equipment. It includes a cylinder connected to a solenoid valve for controlling the cylinder's lifting and lowering; it also includes an electrically controlled valve; the cylinder has a self-locking structure for locking its lifting and lowering position, and the electrically controlled valve is electrically connected to the self-locking structure; the electrically controlled valve has a pneumatic control structure for controlling the self-locking structure by sensing the pneumatic pressure state of the cylinder; the electrically controlled valve and pneumatic control system ensure that during operation, it senses whether air is supplied or whether the pneumatic pressure is within a preset working range, thereby preventing changes in the cylinder's height position during operation and thus avoiding impact on production activities.

In seeding machines, a tank for storing compressed air is unnecessary, allowing for a smaller size. [Solution] The seed planter 10 propels seeds S from a nozzle 11 using pneumatic pressure. The seed planter 10 includes a launching unit 13 having a cylinder 31 and a piston 32 that reciprocates within a cavity 311 in the cylinder 31, and a drive source 12 for moving the piston 32 in the direction that expands the cavity 311. The launching unit 13 has an elastic member 36 that applies elastic force to the piston 32 in the direction that contracts the cavity 311.

The invention relates to a crimping device (1) designed as a stationary unit, pneumatically actuated for carrying out a crimping process, comprising a housing (2), a pneumatic cylinder (24), a pneumatic piston (25), a crimping lever (11) and a crimping die (31), wherein the pneumatic piston (25) is movable in the pneumatic cylinder (24) by a pneumatic pressure (P), the pneumatic piston (25) acts on the crimping lever (11) and the crimping lever (11) is pivotably mounted in the housing (2) which has a housing wall (3) for moving the crimping die (31) between a starting position and a pivoting position, wherein, in addition, upon a triggering signal (S), an automatic execution of the crimping process takes place, with a movement of the crimping lever (11) from the starting position via the pivoting position, in which the crimping die (31) reaches a crimping position (C), back to the starting position.In order to advantageously further develop a crimping device of the aforementioned type, it is proposed that the pivoting position of the crimping lever (11) can be detected to determine whether the crimping position (C) of the crimping die (31) has been reached.

The application belongs to the field of aero-engine test, and particularly relates to a rig aerodynamic pressure measurement system pipeline sealing inspection equipment and method. The equipment comprises a digital pressure instrument, a measurement channel input port of the digital pressure instrument is connected with a measured equipment through an aerodynamic pressure measurement pipeline, and the aerodynamic pressure measurement pipeline is sealed at a pipeline plug end connected with the measured equipment during pipeline sealing inspection; a working mode conversion control pipeline comprises a main control pipeline and five control branches; a first end of an inspection gas source pipeline is connected with an inspection gas source, and a second end is connected with a PRG port of the digital pressure instrument; a second pressure sensor and a sixth aerodynamic valve are arranged on the inspection gas source pipeline; and an upper computer is used for controlling the digital pressure instrument to perform mode conversion and controlling each aerodynamic valve. The application can simultaneously and on-line seal and inspect 16 aerodynamic pressure measurement pipelines, and has the function of accurately positioning a gas leakage pipeline.

The utility model relates to a seeding disc-shaped piece and a seeding unit for a pneumatic seeding machine and the pneumatic seeding machine, the seeding disc-shaped piece comprises a disc-shaped component, and at least one circle of looped through holes are formed in the disc-shaped component. A seed side and an air side opposite to each other are defined in the disc member such that as the circumferential portion including the through-holes enters the bowl with respect to the loose seed, the seeding disc is introduced into the bowl, the seed is held by each of the through-holes at the seed side due to the effect of a pneumatic pressure difference between the seed side and the air side. The disc-shaped member includes at least one seed holding bracket portion adjacent to the through-hole at the seed side at the radially innermost side with respect to the corresponding through-hole. The seed holding bracket portion is provided at least angularly corresponding to some of the through holes, and extends in the circumferential direction so as to at least partially offset the weight of the loose seed located on the seed held by the through holes when the disc is introduced into the bowl with respect to the loose seed.

The present invention relates to a method and platform for generating CAR-T cells and processing biological cells within a single functionally closed container. The method involves introducing host cells into a sealed container with multiple sterile channels, performing genetic modifications, and maintaining the cells under controlled conditions monitored by real-time feedback until a desired fraction of genetically modified cells is obtained. The container also supports target cell separation using antibody or aptamer functionalized buoyant microbubbles, facilitating the separation of target cells from non-target cells during centrifugation. Waste separation and cell harvesting are performed using pneumatic pressure, enabling high purity cell recovery. The platform includes modules for cell enrichment, sequestration, and isolation, enabling high recovery and high purity of therapeutic cell populations. This integrated closed system approach ensures sterile conditions, efficient processing, and high quality cell products for advanced therapeutic applications.

A pneumatic pressure controller includes a body, an inflation plunger, a vent and a deflation diaphragm or piston. The body defines an input chamber and an output chamber for connection of a pneumatic pressure source and pneumatic container respectively. The plunger is biased towards a closed condition wherein it inhibits fluid flow from the input chamber to the output chamber and is movable against the bias to allow such fluid flow for inflation of the pneumatic container. The diaphragm or piston is variably biased towards a closed condition wherein it closes the vent. The diaphragm or piston is configured to move away from the vent to an open condition under the influence of fluid pressure in the output chamber when the inflation plunger is in the closed condition and the variable bias is sufficiently reduced, enabling fluid from the pneumatic container to egress to the atmosphere via the vent.

The present invention relates to a technique for associating changes in surface curvature with radiation characteristics and measuring hardness by using pneumatic pressure in a non-contact manner on the surface of agricultural products such as fruits. A hardness measurement system according to one embodiment may comprise: a conveyor control unit, which controls a conveyor to transport an object in one direction; a non-contact pressing unit, which presses, in a non-contact manner, the object being transported in the one direction so as to induce a change in curvature on the surface of the object; a curvature change measurement unit for measuring physical quantity changes or image changes due to the changed curvature; and a hardness calculation unit for calculating the hardness of the object on the basis of the measured changes in physical quantity or image.

The application discloses a kind of batch assembly equipment based on filter core and pipette tip, including bottom plate, transmission mechanism, mixing component, feeding assembly and filter core discharge assembly, wherein, transmission mechanism is set on bottom plate, mixing component is set on transmission mechanism, feeding assembly is set on transmission mechanism, filter core discharge assembly is set on transmission mechanism, filter core discharge assembly includes outer shell, material guiding mechanism and pneumatic feeding mechanism, wherein, outer shell is set on transmission mechanism, material guiding mechanism is rotatably set on transmission mechanism, pneumatic feeding mechanism is movably set on outer shell, and pneumatic feeding mechanism is used to blow filter core into pipette tip. Thus, rotating mixing prevents filter core accumulation and clogging while rotating drive drives material collecting tank, filter core falls into material collecting tank and then falls into pipette tip, pipette tip matches with material collecting tank during movement, and filter core is blown into pipette tip by pneumatic pressure to ensure assembly stability.