220results about "Fluid pressure control" patented technology

The invention provides a safety risk control method for geological storage of carbon dioxide and electronic equipment. A distributed optical fiber sensing system is arranged in at least one injection well of the target sealing and storage area in the axial direction of a shaft and penetrates through a main cover layer and a reservoir; the method comprises the following steps: acquiring background data through a distributed optical fiber sensing system, and establishing a multi-parameter baseline model including a temperature field, a strain field and background noise; temperature, strain and sound wave vibration signals are collected in real time, and key features are extracted; the key features extracted in real time are compared with a preset risk feature library, the types of risk events are identified, and the identified risk events are graded according to the spatial range and intensity of the abnormal signals; and according to the type and the grade of the risk event, generating and executing a corresponding control instruction. According to the embodiment of the invention, the optical fibers are distributed in the whole area along the shaft and the target stratum, a three-dimensional monitoring network covering the sealing body is constructed, and the hysteresis quality of traditional point type measurement and periodic exploration is overcome.

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 relates to a compressor module (10), in particular for a compressed-air supply system (20) of a vehicle. The compressor module (10) comprises a compressor (12) and a speed-regulated brushless electric motor (14) for driving the compressor (12). During operation of the electric motor (14), a motor current (IB) arises. The electric motor (14) is assigned motor electronics having an electronic commutator and speed regulation. The compressor module is connected to or comprises an electronic control unit (100). The electronic control unit (100) is designed to specify, according to the average motor current (IB), one of at least two different target speeds for the electric motor (14), namely at least a predefined first target speed (n1, soll) and a predefined second target speed (n2, soll) which is less than the predefined first target speed (n1, soll), and to switch from specifying the predefined first target speed (n1, soll) to specifying the predefined second target speed (n2, soll) when the average motor current (IB) reaches or exceeds a specified motor-current current limit value (Imax; Imax, red).

A capacity control valve with which a valve element can be smoothly controlled and the valve element can be stably held at a maximum stroke position is provided. In a capacity control valve V, a position of a valve element 51 is changed by drawing a movable iron core 84 to a fixed iron core 82 with magnetic force by energization of an electromagnetic coil 86. The iron core 82 on one side includes a projected portion 90 on the radially outer side, the iron core 84 on the other side includes a projected portion 92 on the radially inner side, and these projected portions are capable of being loosely fitted to each other when the movable iron core 84 is drawn to the fixed iron core 82. The projected portion 90 is formed to be smaller than an opposing surface 93 of the iron core 84 facing an effective magnetic force surface 90a of a distal end of the projected portion and formed in a tapered shape.

The present invention relates to a sealing test apparatus (D1) for a system that isolates two media in a sealed manner, the system including a flange and a sealing blocking device mounted in the flange, the test apparatus comprising: a housing (36) including an expandable seal (48) intended to contact the system in an expanded state and ensure the sealing of a test space defined between the system and the housing; a pneumatic pump (P1) and a pneumatic circuit (C1) configured to connect the pump (P1) to the expandable seal (48) in a first step such that the pump (P1) expands the expandable seal (48), and to connect the pump (P1) to the test space in a second step such that the pump (P1) generates a pressure of a given value in the test space; and means for measuring the pressure in the test space.

A system for producing a powder-gas jet for performing a dental treatment, wherein the system is configured for being connected to a dentist chair by a connection, wherein the connection of the system to the dentist chair allows the system to be fed by a pressurized gas flow, the system comprising a compressed gas circuit configured to direct the pressurized gas flow into a powder-gas-mixing chamber to form a gas-powder mixture, the system being wherein the compressed gas circuit comprises at least a pressure regulation device having an inlet and an outlet, the regulation device being configured to provide the pressurized gas flow with a pressure at its outlet that is independent of the pressure of the gas flow at its inlet, when it is fed by the pressurized gas flow.

The present disclosure provides a pressure control method and device, and a semiconductor process apparatus. The method comprises: acquiring set pressure and measured pressure of a reaction chamber; if the measured pressure is inconsistent with the set pressure, determining a movement direction of a pressure regulating valve on the basis of the measured pressure and the set pressure, and controlling the pressure regulating valve to move in the movement direction; during movement of the pressure regulating valve, continuously acquiring the measured pressure, and when the measured pressure falls within a set range near the set pressure, controlling the pressure regulating valve to stop moving; and on the basis of the measured pressure and the set pressure, performing closed-loop regulation on the pressure regulating valve. By ending open-loop regulation in advance or delaying the ending of the open-loop regulation, the present application avoids pressure hysteresis or pressure advance, so that the timing for ending open-loop regulation (or the timing for starting the closed-loop regulation) is relatively accurate, and the closed-loop regulation time is relatively short, and thus, the response time of the whole pressure control procedure is relatively short, the pressure in the reaction chamber is relatively stable, and the process quality of a product is ensured.

Disclosed is a self-power-generating digital pressure reducing valve, comprising a main valve (1), and further comprising an electric pressure reducing pilot valve (2). A water inlet port of the electric pressure reducing pilot valve (2) is connected to a water inlet end of the main valve (1) by means of a first pipe (3); a water outlet end of the main valve (1) is connected to a water outlet port of the electric pressure reducing pilot valve (2) by means of a second pipe (4); the water outlet port of the electric pressure reducing pilot valve (2) is connected to an upper diaphragm cavity of a main valve control chamber by means of a third pipe (5); a lower diaphragm cavity is connected to the outside by means of a fourth pipe (15); a fifth pipe (6) is further connected between the water inlet end and the water outlet end of the main valve (1); and a hydroelectric generator (7) is provided on the fifth pipe (6). The digital pressure reducing valve further comprises pressure detection devices (8) arranged before and after the main valve, and a controller for receiving detection signals of the pressure detection devices (8) so as to control the opening and closing of the electric pressure reducing pilot valve (2); and the hydroelectric generator (7) is connected to the pressure detection devices (8) and the electric pressure reducing pilot valve (2). The digital pressure reducing valve can achieve self-power generation to meet power utilization requirements of electric devices, and can be remotely regulated and controlled.

The invention relates to a gas control valve (1) for electronic pressure control of a gas-air mixture at a gas boiler, wherein the gas control valve (1) comprises a central module (40), a control module (20), and a sensor module (30), wherein the central module (40) is permeable to gas flow from a valve inlet (41) to a valve outlet (42), wherein the control module (20) can be arranged directly on the central module (40) and is configured to control the flow of gas through the central module (40) with a throttle element (23) arranged fluidically between the valve inlet (41) and the valve outlet (42), wherein the sensor module (30) can be arranged directly on the central module (40) and comprises at least one sensor (31, 32) which is operatively connected to the gas flowing through the central module (40) via a gas inlet (44) arranged fluidically between the throttle element (23) and the valve outlet (42). and which is trainedFor pressure control, a pressure difference between the gas flowing through the central module (40) and air having a reference pressure is to be detected.

Techniques for controlling water pressure at a plurality of water customer service sites are described. In an example, a first plurality of water service sites having water pressure values greater than a first threshold value are identified. A second plurality of water service sites having pressure values less than a second threshold value are identified. Valves controlling water flow to respective customer service sites within the first and second pluralities of water service sites are adjusted. The adjustments increase water pressure in the second plurality of water service sites to a pressure above a minimal target pressure. The adjustment maintains the water pressure of the first plurality of service sites above the minimal target pressure. In an example, groups of water service sites are associated with respective water mains and / or water pressure sensors. Information shared between groups may assist in adjusting water valves within the water system.

An air supply system for a fuel cell stack of a fuel cell system includes a compressor, a check valve located in a cathode outlet line, a connection point located in the cathode outlet line connecting an external system to the air supply system, a compressor outlet sensor that determines a measured compressor outlet pressure, a pressure differential request based on a required flow rate measured at the connection point, and one or more controllers in electronic communication with the compressor, the check valve, and the compressor outlet sensor. The one or more controllers learn a parameter of a check valve command via forward feedback when a feedback component of the check valve command is a non-zero value.

The present invention relates generally to the field of automated process control systems and methods. More specifically, the present invention relates to controlling a pumping station including a plurality of variable speed pumps connected to a closed supply network (e.g., a water distribution system (WDS)). The claimed invention represents a system and method of controlling a plurality of VSPs, which provide a technical improvement of a technical field of automated process control by decreasing the total and instantaneous power consumption of the plurality of VSPs while maintaining the required flow volume demand at the desired pressure setpoint, as well as increasing the effectiveness of adjustment to changing demands of the network and extending motor life of pumps by balancing frequency of their starts and stops.

To provide a valve system that allows a valve opening position of a blocking valve to be estimated sooner.SOLUTION: A valve system 1 includes a tank 2 capable of storing fluid, a pressure sensor 6 for detecting inner pressure of the tank 2, a valve 4 having a valve body 11 and opening / closing the tank 2, a stepping motor 12 for stroking the valve body 11 of the valve 4, and a control device 5. The control device 5 moves the valve 4 in a valve opening direction after the start of a cycle, reverses the moving direction of the valve body 11 of the valve 4, moves the valve to a stand-by position for a valve closing state, calculates a first pressure change ratio, which is a change ratio of the inner pressure from the start of the cycle, determines a stand-by time so that a second pressure change ratio of the inner pressure, which is a change ratio of the inner pressure from the start to the end of the cycle, is equal to a target change ratio if the first pressure change ratio is greater than the target change ratio, and stops the stepping motor 12 at the stand-by position until the determined stand-by time elapses.SELECTED DRAWING: Figure 1

The invention relates to a device for operating non-explosion-proof equipment in a potentially explosive atmosphere, comprising a pressurized housing (1) designed to accommodate the non-explosion-proof equipment (2), a purge gas inlet (3) arranged upstream of the housing (1) through which a protective gas (4) can be supplied to the housing (1) under overpressure, and a purge gas outlet (7) arranged downstream of the housing (1) through which the protective gas (4) can be discharged from the housing (1). For the discharge of the protective gas (4), an outlet valve (8) with a valve seat (16) and a valve body (30) is arranged in the purge gas outlet (7). The valve body (30) is connected to the first end of a guide axis (31) which is slidably mounted in a through bore (21) in the valve seat (16) along the valve axis (15) so that the valve body (30) is axially adjustable between a closed position and an open position.By means of a spring element (34), the valve body (30) is biased against the valve seat (16) in the closed position. To achieve efficient and gentle operation with moderate equipment costs, the invention proposes that a baffle element (32) be attached to the opposite second end of the guide axis (31) and that a control housing (25) with a working chamber (28) be connected to the valve seat (16), wherein the baffle element (32) is arranged within the working chamber (28) and without contact with the control housing (25). Furthermore, the control housing (25) has a connection (27) to which a control line (9) is connected for supplying the working chamber (28) with a working fluid (29), via which the working chamber (28) and the baffle element (32) arranged therein can be pressurized with the working fluid (29) from the control line (9).

A fluid control system is provided for controlling flow of a process fluid through a pipeline. The fluid control system can include a valve arranged to control a flow of process fluid, an actuator configured to adjust a position of the valve, and a controller configured to control movement of the actuator. The system may include a switching valve in communication with the actuator and the controller. Further, a solenoid valve may be in communication with a first port of the switching valve. In one example, depending on pressure at the first port of the switching valve, the switching valve is operable in a first state to provide process fluid to the valve controller and permit movement of the actuator and in a second state to block flow of process fluid to the valve controller and block flow of process fluid from the pneumatic actuator.

A method for draining a water supply system onboard an aircraft which supplies water from a central water tank to consumers. Water is supplied by a supply pump from the central water tank through supply lines of a conduit system to consumers. Each consumer is associated with a supply valve for drawing water from the conduit system. The supply lines have a maximum internal diameter of 8 mm or less. The method includes closing the supply valves of all consumers, subjecting the supply lines of the conduit system at the at the supply pump to a draining pressure and sequentially opening the supply valves of all consumers for removing water from the supply lines of the conduit system. A corresponding water supply system and an aircraft are disclosed.

A method and apparatus for pulsed gas delivery with pressure control is provided. A pulsed gas supply with mass flow control is obtained by using a thermal mass flow sensor and a control valve. The controller is augmented for pressure control with a downstream pressure sensor. In separate control operating modes, the control valve is controlled in response to the flow sensor in a pulsed gas supply mode and in response to the downstream pressure sensor in a pressure control operating mode.

The present application provides a technology capable of performing more stable positioning control. A control operation device performs an operation for compensating a volume change amount of each pressure chamber caused by a position change of a pressure receiving plate in a cylinder chamber with respect to each position command value output to two servo amplifiers, and then outputs the compensated position command value to the two servo amplifiers, respectively, to perform origin positioning of a position of a slider in order to compensate the volume change amount.

A pressure reducer assembly for reducing the pressure of a fluid, preferably a liquid, more preferably water, comprising: a pressure reducer body, the pressure reducer assembly comprising an inlet section and an outlet section fluidly coupled with the inlet section; a biasing member piston rod; a pressure reducer assembly includes a pressure reducer body including a pressure compensation bore connecting a pressure reducer chamber and an outer surface of the pressure reducer body, and a valve at an inlet section, the valve including a seal seat, the seal seat is configured to selectively interact with the end of the biasing member piston rod to allow and disallow fluid flow through the pressure reducer assembly. The valve is mounted to the pressure reducer body, and the pressure reducer assembly is configured to be detachably mounted, in particular tool-free, to the fluid outflow device and the fluid inflow device such that air pressure inside the pressure reducer chamber can be compensated via the pressure compensation hole and complementary threads of the fluid outflow device and the fluid inflow device.

Fluid detection systems and methods using the same are disclosed. In embodiments the fluid detection systems include a sensor module and an electronics module. The sensor module includes a sensor housing that includes a liquid flow path and a sensor element disposed around at least part of the liquid flow path. The sensor element can detect a capacitance of the liquid flow path and provide a sensor signal to a controller in the electronics module. The electronics module can determine a detected capacitance in the liquid flow path based at least in part on the sensor signal, and can determine whether a wet event has occurred based on a comparison of the detected capacitance to a threshold capacitance. Methods using the fluid detection systems and fluid supply systems including the fluid detection systems are also disclosed.

A fluid control system (10) for a pilot-operated pressure regulating valve (4) comprises a first conduit (12), defining a first flow path, and a second conduit (14), defining a second flow path. The second conduit (14) is parallel to the first conduit (12) and comprises a restriction aperture (70). A variable flow restrictor (20) within the second conduit (14) is arranged to selectively vary a cross-sectional area of the restriction aperture (70). The first conduit (12) comprises a converging portion (48), for reducing the pressure of fluid flowing through the converging portion (48) to an intermediate pressure, and a diverging portion (54). The system (10) also includes a control fluid port (22) for connecting to a control volume (34) of the pressure regulating valve (4), the control fluid port (22) being configured to receive fluid at the intermediate pressure from the first conduit (12).

To provide a distributed type dwell and storage cooperative water supply system which belongs to the technical field of secondary water use in buildings to solve the problem of conventional water supply systems which require repeated starting and stopping of a water pump, resulting in low water supply efficiency.SOLUTION: A distributed type dwell and storage cooperative water supply system comprises a water storage device, a pressurizing device, a plurality of water storage and dwell devices, and a transport pipe network. The water storage device is connected to the pressurizing device via the transport pipe network, and the pressurizing device is connected to each floor water supply end via the transport pipe network. The water storage and dwell devices are respectively installed on at least some of the different floors. The water storage and dwell device includes a dwell water tank, a pressure sensor, and a solenoid valve. The solenoid valve controls the opening and closing of the floor water supply end of a floor where it is located and a pipeline between the dwell water tank and the pressurizing device. The pressure sensor is used to obtain the water pressure in the pipeline from the dwell water tank to the floor water supply end of the floor where it is located, and further includes an automatic controller. The solenoid valve, the pressure sensor, and the pressurizing device are all electrically connected to the automatic controller.SELECTED DRAWING: Figure 2

A method can include receiving and storing, with an atmospheric reservoir, a cooling liquid from a cooling liquid source. Directing the cooling liquid from the atmospheric reservoir to an inlet of a data center cooling system. Receiving, with an inlet of a sub-atmospheric reservoir, the cooling liquid from an outlet of the data center cooling system. Controlling an inlet pressure at the inlet of the data center cooling system with a control valve. The control valve can be installed between the atmospheric reservoir and the inlet of the data center cooling system. Controlling an outlet pressure at the outlet of the data center cooling system with a pump. An inlet of the pump can be fluidically connected to an outlet of the sub-atmospheric reservoir. The inlet pressure of the data center cooling system can be greater than the outlet pressure of the data center cooling system.

To provide a negative pressure regulating valve, with a simple configuration, capable of reducing residual air and solid matter in an outflow-side pressure chamber and to provide an ink-jet recording device with the same.SOLUTION: A negative pressure regulating valve has an inflow-side pressure chamber, an outflow-side pressure chamber, a communication hole that allows the two chambers to communicate with each other, and a valve member. The valve member is inserted into the communication hole and is movable between a closed position, in which the communication hole is closed in response to a pressure change in the outflow-side pressure chamber, and an open position, in which the communication hole is opened. The outflow-side pressure chamber has, as a liquid outflow hole, a first outflow hole formed below the communication hole, and a second outflow hole formed above the communication hole. When flowing a first fluid out of the outflow-side pressure chamber via the first and second outflow holes, a first fluid channel resistance while the first fluid is passing through the first outflow hole is smaller than a second channel resistance while the first fluid is passing through the second outflow hole.SELECTED DRAWING: Figure 4

To provide a constant-pressure valve which is excellent in bending performance of a diaphragm and can reduce the generation of particles.SOLUTION: A valve-body side abutment face 21x which is vertical to a moving direction of a valve body 21 and a shaft 31 is formed at the valve body 21, a shaft-side abutment face 31x vertical to the moving direction of the valve body 21 and the shaft 31 is formed at the shaft 31, a valve-seat side abutment face 41x vertical to the moving direction of the valve body 21 and the shaft 31 is formed at a flow rate control flow passage 13, a valve-closing abutment part 41y protruding in a ring shape is formed at the valve-body side abutment face 21x or the valve-seat side abutment face 41x, a valve body pressing abutment part 31y protruding in a ring shape is formed at the valve-body side abutment face 21x or the shaft-side abutment face 31x, the shaft 31 and a shaft-side diaphragm 32 are formed of composite materials obtained by joining PTFE and bridged PTFE, the shaft-side diaphragm 32 is formed of PTFE, and the shaft-side abutment face 31x is formed of bridged PTFE.SELECTED DRAWING: Figure 1

A mechanical fluid pressure regulator comprising: a regulator portion for housing a valve assembly, and a manual adjustment portion. The regulator portion having a supply port for receiving a supply pressure and a delivery port for providing a delivery pressure; the delivery port being in selective fluid communication with the supply port. The adjustment portion having a structure at least partially disposed therein. The structure is adjustable for establishing the delivery pressure at a set target and comprises a locking mechanism. The locking mechanism generating prevailing torque to prevent unintentional adjustment of the structure.

A continuously adjustable valve (10) with a valve slide (14) which can be displaced by an actuator (18) in a valve housing (12) and with an electronic control unit (16; 116) which controls a pressure regulator (2) for determining a control deviation (Δp) between an internal setpoint pressure (p) is revealed. soll int ) and an actual pressure (p ist The pressure regulator (2) controls a setpoint (6) for the actuator (18) depending on the pressure control deviation (Δp). A minimum value generator (1) is used to determine the internal setpoint pressure (p). soll int ) by selecting the lower value of an external target pressure (p) soll ext ) and on the other hand a system pressure (p sys ) is planned. A corresponding procedure has also been disclosed.

The invention relates to a printing cylinder assembly (1) for detecting errors present and / or being formed during printing. The printing cylinder assembly (1) comprises: at least one printing cylinder (2) adapted to print on a material and having at least one cylindrical body (21), at least one shaft (23) forming an axis of rotation for the body (21), and characterized in that the printing cylinder (2) has at least one cavity (22) extending from a surface of the body (21) towards an inner volume thereof; at least one sensor (3) adapted to be placed in said cavity (22); at least one communication interface (4) adapted to communicate with an external device; at least one control unit (5) adapted to receive data from the sensors (3) and to transmit these data to an external device directly and / or by processing them via a communication interface; and at least one power source (6) for supplying the electrical power required by the sensor (3), the communication interface (4) and / or the control unit (5).

A fluid control system 10 for a pilot-operated pressure regulating valve comprises a first conduit, defining a first flow path, and a second conduit 14, defining a second flow path. The second conduit 14 is parallel to the first conduit and comprises a restriction aperture 70. A variable flow restrictor 20 within the second conduit 14 is arranged to selectively vary a cross-sectional area of the restriction aperture 70. The first conduit comprises a converging portion 48, for reducing the pressure of fluid flowing through the converging portion 48 to an intermediate pressure, and a diverging portion 54. The system 10 also includes a control fluid port 22 for connecting to a control volume of the pressure regulating valve, the control fluid port 22 being configured to receive fluid at the intermediate pressure from the first conduit. [Fig 3]