1314 results about "Isolation valve" patented technology

A compartmentalized hydraulic fracturing (frac) system may include a mono line configured to carry frac fluid into a well. The system may include a plurality of zones, each zone comprising: a set of one or more frac pumps each configured to pump frac fluid into the mono line, an isolation valve configured to control the flow of frac fluid between the set of frac pumps and the mono line; and a bleed valve configured to release pressurized frac fluid from the set of frac pumps when in an open position. The system may include partition walls between the plurality of zones. The system may include a control system configured to deactivate or reactivate a zone of the plurality of zones by controlling the set of frac pumps, the isolation valve, and the bleed valve of the zone.

The invention provides a hydraulic remote opening and closing method and system for a stratum isolation valve, and the method comprises the steps: obtaining underground sensor data, and building an underground tubular column topological structure model; constructing a graph neural network for the fluid flow data and the pipeline network, and calculating an optimal opening and closing path; real-time pressure compensation calculation is conducted on the optimal opening and closing path, it is ensured that the valve can be dynamically adjusted during execution, and an optimized control signal is obtained; and converting the control signal into an actual hydraulic opening and closing action, monitoring the state of the valve in real time, monitoring the pressure and the flow of each node through real-time feedback, comparing the pressure and the flow with the target pressure and the target flow, and if the comparison value exceeds a preset threshold value, recalculating a new control signal, and finely adjusting the hydraulic valve. The optimal opening and closing path is intelligently calculated, and a real-time pressure compensation mechanism is combined, so that hydraulic control is more accurate and reliable.

A capacity control valve includes a main valve that opens and closes communication between a discharge port and a control port formed in a valve housing by movement of a rod driven by a solenoid, a CS communication passage providing communication between a control fluid supply chamber formed in the valve housing and a suction port, and an on-off valve formed by a communication passage forming member having an annular valve seat in an outer periphery of the CS communication passage and an on-off valve element biased in the valve closing direction with respect to the valve seat.

The utility model relates to the technical field of PVD (Physical Vapor Deposition) coating, in particular to a PVD coating vacuum system, which comprises a feeding table, a sheet inlet / outlet chamber, a first buffer chamber, a process chamber, a second buffer chamber and an isolating valve, and the sheet inlet / outlet chamber, the first buffer chamber, the process chamber and the second buffer chamber are sequentially arranged behind the feeding table. Isolation valves are arranged between the feeding table and the sheet inlet and outlet chamber, between the sheet inlet and outlet chamber and the first buffer chamber, between the first buffer chamber and the process chamber, and between the process chamber and the second buffer chamber; and when the isolation valves are closed, all the chambers form closed chambers. According to the PVD coating vacuum system disclosed by the utility model, the isolating valves are arranged among the vacuum chambers, so that the vacuum degree of each vacuum chamber can be well controlled; the vacuum coating system is simple in structure, high in reliability, low in cost and capable of being used for research and development of PVD coating products, continuous production can be achieved, cost is saved to a great extent, and working efficiency is improved.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses a fine processing mixed bed failure situation situation sensing system and method, the sensing system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Situation awareness of mixed bed failure is achieved by establishing a layered monitoring system, and long-term stability of water quality of a water vapor system of a power plant is guaranteed.

The invention discloses a vacuum cavity pressure maintaining test and leak rate rapid estimation method and system, and the method comprises the steps: achieving the test preparation of multiple sections through a public metering manifold and a multi-way isolation valve, and building a section volume database; the pressure and temperature data are synchronously collected in a fixed sampling period by exhausting air to preset pressure and isolating a pump end; obtaining an equivalent pressure change rate through temperature normalization and deflation baseline deduction in combination with filtering and regression algorithms, and performing conversion to obtain a standardized leak rate; step-by-step detection is carried out on each functional section of the cavity through a segmented bipartite isolation strategy and volume correction, and rapid positioning of a suspicious leakage section is realized; through double-threshold determination of an early warning threshold and an unqualified threshold, a detection report is automatically generated and written into a historical database, and a detection-determination-maintenance closed loop is formed. The method can improve the precision of leak rate detection, and is suitable for vacuum coating equipment, semiconductor process equipment and industrial vacuum treatment devices.

The invention relates to the technical field of generator set mixed bed operation monitoring, and discloses an operation health degree monitoring method and system based on fine treatment mixed bed resin tracking, the monitoring system comprises a sampling tube, a sampling electric valve, a sampling isolation valve, a cation resin column, a conductivity meter, a mixed bed failure monitoring device and a resin regeneration system; the sampling pipe extends into the central axis of the fine treatment mixed bed; a plurality of sampling pipes are arranged along the height direction of the fine treatment mixed bed, are sequentially connected with a sampling electric valve and a sampling isolation valve, and then are connected in series to one end of a cation resin column; the other end of the cation resin column is connected with the conductivity meter; the mixed bed failure monitoring device is electrically connected with the sampling electric valve, the sampling isolation valve and the conductivity meter; and the resin regeneration system is connected with a water inlet pipeline and a water outlet pipeline of the fine treatment mixed bed through a fine treatment mixed bed resin inlet valve and a fine treatment mixed bed resin outlet valve respectively. Health degree monitoring is realized by establishing a layered monitoring system, and long-term stability of water quality of a power plant system is guaranteed.

The invention discloses a hydraulic system and a stroke limiting and protecting device thereof.The hydraulic system comprises a system hydraulic source and an execution hydraulic cylinder, the execution hydraulic cylinder comprises a first hydraulic cavity, a second hydraulic cavity and a hydraulic cylinder piston rod, and the execution hydraulic cylinder is used for being connected with a rotary execution mechanism; the stroke limiting and protecting device comprises an extreme position limiting device, the extreme position limiting device comprises a stroke limiting valve and a stop check valve, and the stroke limiting valve is used for being opened when a piston rod of the hydraulic cylinder reaches an extreme position, so that a first hydraulic cavity is communicated with a second hydraulic cavity; the speed limiting device comprises a proximity switch and a range limiting signaling valve; and the zeroing device comprises a centering valve, a centering function isolation valve and a centering signal valve. According to the hydraulic system and the stroke limiting and protecting device, stroke limiting and protecting and necessary automatic control of the execution hydraulic cylinder can be achieved, and the diversified requirements of an execution tail end are met.

A brake system may include a first pressure supply unit having an electromotive drive and arranged to supply pressure medium to first and second brake circuits; a motor-pump unit to supply pressure medium to at least one of the brake circuits; a second pressure supply unit, connected to the motor-pump unit via first and second hydraulic lines and arranged to supply pressure medium to at least one of the brake circuits; and a valve unit. The second pressure supply unit may be connected via a third hydraulic line to at least one of the brake circuits. The valve unit may include at least one feed valve via which the third hydraulic line may be at least partially reversibly shut off. An isolating valve may be disposed in at least one of the hydraulic lines to at least partially reversibly shut off the at least one hydraulic line.

The invention relates to an air system for an aircraft, that includes air consumers; air sources and a network of ducts and associated control valves controlled by a control unit. The air system is characterized in that: the network of ducts and associated valves includes at least one isolation valve, arranged between an air bleed device and an air duct connecting an air conditioning pack and an auxiliary power unit; the control unit is configured to be able to determine an ideal configuration of the control valves according to the identified requirements of each consumer and a degraded configuration that makes it possible to supply air to predetermined air consumers from the available air sources when the ideal configuration is not attainable.

The invention relates to a valve assembly (1) for a fuel gas tank (2), comprising a valve block (3) with a bore (4) in which a controllable shut-off valve (5) and a check valve (6) are arranged in series, wherein the shut-off valve (5) has a housing part (7) with an axial bore (8) which on the one hand forms a valve seat (9) and on the other hand an outlet opening (11) which can be closed by a valve closing element (10) of the check valve (6), wherein at least one leakage path (12) is formed in the housing part (7) and / or in the valve closing element (10) which allows a defined leakage into the axial bore (8) in the closed position of the valve closing element (10). The invention further relates to a fuel gas tank (2) with a valve assembly (1) according to the invention.

The servo quantitative gluing machine comprises a quantitative assembly and an isolating valve, the quantitative assembly comprises a quantitative cylinder, a glue inlet and a glue outlet, the glue inlet can be controlled to be opened or closed, the isolating valve is arranged in the quantitative cylinder in a single-degree-of-freedom sliding mode and divides the quantitative cylinder into a front cavity and a rear cavity, and the front cavity is communicated with the rear cavity. The rubber inlet is communicated with the front cavity, the rubber outlet is communicated with the rear cavity, and the isolating valve is opened or closed along with sliding of the isolating valve, so that the front cavity and the rear cavity are communicated or isolated; the sizing material inlet and the isolating valve are alternately opened; according to the servo quantitative gluing machine, the quantitative cylinder is arranged and matched with sliding of the isolation valve, it is ensured that the single-time glue discharging amount is stable, the glue discharging speed is uniform, and the working efficiency is effectively improved.

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

A method for performing a pump down cycle to isolate an indoor section of a heating, ventilation, and air conditioning (HVAC) from an indoor section of the HVAC system is disclosed. The method includes transmitting a first control signal to a compressor of the HVAC system. The first control signal causes the compressor to turn on or stay turned on. The method further includes transmitting a second control signal to a vapor line isolation valve. The second control signal causes the vapor line isolation valve to open. The method further includes transmitting a third control signal to a liquid line isolation valve. The third control signal causes the liquid line isolation valve to close. The method further comprises determining that a refrigerant charge in the indoor section has become less than a threshold value. In response, the compressor is turned off and the vapor line isolation valve is closed.

The invention discloses a valve device which comprises a valve element, a valve body assembly and a valve seat, the valve device comprises a channel cavity and a valve cavity, and the channel cavity and the valve cavity are isolated at the abutting position of the valve seat and the valve element. The valve device is provided with a containing chamber, the containing chamber is located between the valve seat and the valve body assembly in the radial direction of the channel cavity, and a sealing mechanism is arranged in the containing chamber and used for sealing between the valve seat and the valve body assembly. The accommodating chamber can be communicated with the channel cavity, or the accommodating chamber can be communicated with the valve cavity; the sealing mechanism comprises a first sealing component and a second sealing component which are oppositely arranged, each of the first sealing component and the second sealing component comprises a bottom plate part, the bottom plate parts of the two sealing components abut against the valve body assembly and the valve seat in the axial direction of the channel cavity, flanging parts are arranged on the inner edges and the outer edges of the bottom plate parts, and flanging parts are arranged on the inner edges and the outer edges of the flanging parts in the axial direction of the channel cavity. The two flanging parts of the bottom plate part are located on the same side of the bottom plate part, and the flanging parts of the two sealing components are oppositely arranged.

The invention belongs to the technical management field of nuclear power plants, and particularly relates to a continuous exhaust system and method for a nuclear power plant voltage stabilizer, the system comprises an automatic pressure relief main pipeline, an exhaust pipeline, a first electromagnetic isolation valve, a second electromagnetic isolation valve, a throttling orifice plate, a drain tank, a radioactive waste gas system, a voltage stabilizer and a pressure stabilizing valve; an automatic pressure relief main pipeline and a pressure stabilizer safety valve are arranged at the top of the pressure stabilizer, an exhaust pipeline is arranged on the automatic pressure relief main pipeline, and the exhaust pipeline is connected with a radioactive waste gas system through a drain tank; a throttling orifice plate is arranged on the automatic pressure relief main pipeline and located on the upstream of the exhaust pipeline. A first electromagnetic isolation valve, a second electromagnetic isolation valve and a pressure stabilizing valve are sequentially arranged on the exhaust pipeline; and the pressure stabilizing valve is an automatic downstream pressure regulating valve. Continuous and stable exhaust of the voltage stabilizer can be achieved, the exhaust frequency is greatly reduced, and meanwhile the operation reliability of the electromagnetic isolation valve is improved.

A heated valve assembly includes a valve and a valve assembly. The valve assembly includes a valve seat extending across the flow passage and a moveable valve member movable in the flow passage relative to the valve seat between a closed position, in which the moveable valve member is sealing engaged with the valve seat to prevent flow of fluid in the flow passage past the valve assembly, and an open position in which the moveable valve member is moved out of sealing engagement with the valve seat. The valve seat includes a valve seat housing of thermally conductive material, and one or more heater elements incorporated within the valve seat housing.

The invention discloses a fuel cell engine control method and device, a fuel cell controller and a medium. The fuel cell engine control method comprises the steps that the current environment temperature is obtained after a fuel cell engine is started, and the current starting mode of the fuel cell engine is determined according to the current environment temperature; after the fuel cell engine enters the current starting mode, the stack air inlet temperature and the stack air inlet humidity are detected, and according to the stack air inlet temperature and the stack air inlet humidity, a hydrogen pump and a gas compressor are controlled to be started for hydrogen supply; after it is detected that the hydrogen discharging valve and the water discharging valve are opened successfully, the isolating valve is opened, the average monomer voltage and the monomer voltage standard deviation are calculated according to the detected actual galvanic pile monomer voltage, and the opening degree of the four-way valve and the opening degree of the back pressure valve are controlled according to the average monomer voltage and the monomer voltage standard deviation; the air flow entering the electric pile is controlled based on the opening degree. According to the invention, the engine can be quickly and efficiently started under different environment working conditions.

A brake system and a method for controlling a brake system. The brake system may include a first module having a first pressure supply unit with an electromotive drive, an optional second pressure supply unit and a first control device for controlling the first pressure supply unit; a second module having a third pressure supply unit, isolation valves and brake-pressure-adjusting valves, and a second control device for controlling the brake-pressure-adjusting valves; and a detection unit for detecting a first case of error. The brake system is designed such that, in the first case of error, in order to provide an ABS function and / or a yaw torque intervention, it implements a (wheel-specific and / or selective) adjustment of the pressures in the wheel brakes by actuating at least one of the brake-pressure-adjusting valves of the second module and / or the isolation valves of the second module and the first pressure supply unit.

The utility model relates to an automatic low-temperature valve which comprises a valve seat. A liquid inlet connector is installed on one side of the valve seat, a plurality of liquid injection steel needles are installed at the bottom of the valve seat in an arrayed mode, a plurality of medium isolation valves are installed at the top of the valve seat in an arrayed mode, and one medium isolation valve corresponds to one liquid injection steel needle. A medium channel is arranged in the valve seat, and the liquid inlet connector is communicated with the liquid injection steel needle through the medium channel via the medium isolation valve. Cooling connectors are arranged on the two sides of the valve seat, a cooling channel is arranged in the valve seat, and the cooling channel is isolated from the medium channel. The cooling channel is wound around the medium channel; one end of the cooling channel is a refrigerant inlet, and the other end of the cooling channel is a refrigerant outlet; the refrigerant inlet connector and the refrigerant outlet connector are connected with cooling circulation equipment through pipelines, and refrigerants are introduced into the cooling channel. The utility model has the advantages of simple structure and strong usability; by adjusting the temperature of the refrigerant, the temperature of the valve seat, namely the medium channel, can be controlled so as to meet the adding environment temperature requirements of reagents with different temperatures, automatic adding is facilitated, and the production efficiency is improved.

The embodiment of the invention provides a hydraulic coupling type electronic hydraulic braking system and method and a vehicle, and relates to the field of vehicle braking, the system comprises a mechanical braking module, a first braking module, a second braking module, an isolation valve, an oil can module and a wheel end module, and the mechanical braking module is connected with the oil can module and the wheel end module; the first braking module is connected with the oil can module, the mechanical braking module and the wheel end module. The second brake module is connected with the mechanical brake module, the first brake module and the wheel end module, the mechanical brake module comprises a two-position three-way valve, a pedal simulation module and a main cylinder, the two-position three-way valve is connected with the main cylinder and the pedal simulation module, the two-position three-way valve is connected with the wheel end module, one end of the isolation valve is connected with the two-position three-way valve, and the other end of the isolation valve is connected with the pedal simulation module. The other end of the isolation valve is connected with the first brake module, isolation of the pedal simulation module and the first brake module is achieved, the first brake loop and the second brake loop are isolated through the isolation valve, and therefore the stable redundancy capacity is ensured.

The utility model belongs to the technical field of valve detection, and discloses a valve tightness detection device, which comprises a moving trolley, a clamping mechanism, a storage tank, an adjusting assembly and a pressure gauge, the clamping mechanism is arranged on the moving trolley and used for fixing a detected valve, the storage tank is arranged on the moving trolley and used for fixing the detected valve, and the adjusting assembly is used for adjusting the pressure gauge. The movable trolley can freely move in a workshop, so that the detection device can move to the side of a detected valve without long-distance carrying, the input end of the adjusting valve is communicated with the storage tank, the output end of the adjusting valve is communicated with the input end of the isolating valve, and the output end of the isolating valve is communicated with the detected valve. The measuring port of the pressure gauge is communicated between the isolating valve and the tested valve, the pressure gauge is used for measuring the pressure drop of the tested valve, before the valve is installed to the process pipeline, the valve tightness detection device is used for testing the leakage rate of the tested valve in an off-line state, the tested valve is installed after meeting the requirement, rework is reduced, and the work efficiency is improved.

A flow control arrangement is provided including a housing seating inlet and outlet conduits is provided. An isolation valve is arranged within the housing and is fluidly coupled to the inlet conduit. A first flow switch with a first shutoff trigger is arranged within the housing and fluidly couples the isolation valve to the outlet conduit. A second flow switch with a second shutoff trigger is arranged outside of the housing and is fluidly separated from the first flow switch. A controller operably connects the first and second flow switches to the isolation valve to close the isolation valve when (a) flow rate of a first fluid traversing the first flow switch is greater than the first shutoff trigger, or (b) flow rate of a second fluid traversing the second flow switch is less than the second shutoff trigger. Semiconductor processing systems and flow control methods are also described.

The invention provides an automatic overpressure isolating valve based on a double-valve-clack structure, and the automatic overpressure isolating valve comprises a valve body which is internally provided with a cavity, and an inlet flange and an outlet flange are respectively arranged at two ends of the valve body; the guide shaft is arranged in the cavity, a cam and a flow guide seat are arranged on the two sides of the tail end of the guide shaft respectively, the guide shaft is sleeved with the flow guide seat, an upper guide sleeve and a lower guide sleeve are arranged at the two ends of the guide shaft respectively, the upper end of the guide shaft is sleeved with the front valve clack, the front valve clack is spirally connected with the upper end of the guide shaft, and the outer side of the front valve clack is connected with the upper guide sleeve. The cylindrical rotary valve clack is arranged at the lower end of the flow guide seat and matched with the cam to achieve rotation of the cylindrical rotary valve clack, the valve seat is arranged at the bottom of the flow guide seat and located below the cylindrical rotary valve clack, and the main spring is arranged on the guide shaft in a sleeving mode and located between the front valve clack and the lower guide sleeve. Double sealing of the valve body is achieved through the front valve clack and the cylindrical rotary valve clack, opening and closing of the valve are accurately controlled, sealing reliability is improved, and the leakage problem is avoided.

The invention relates to a spraying system detection method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring an equiaxed diagram of a spraying system in a nuclear power plant; according to the equiaxed diagram, the target orifice plate flow passing through a throttling orifice plate in the circulation pipeline is determined; under the condition that the target orifice plate flow belongs to the standard flow interval, a spraying pump is controlled to be started, and the pipeline flow in a circulating pipeline is detected; and when it is detected that the pipeline flow in the circulation pipeline is the preset flow, all the isolation valves are controlled to be opened in sequence, and the opening time of the isolation valves and the reliability of the circulation pipeline are detected. By adopting the method, the reliability detection of the spraying system can be simply, efficiently and comprehensively completed.

A downhole shifter tool assembly configured to operate a downhole tool. The shifter tool assembly comprises a anchor tool, an extension tool, a shifting key, and a standoff spacer. The standoff spacer is configured to locate the shifter tool assembly at a reference position by contacting an isolation member on the downhole tool. An anchoring mechanism within the anchor tool can anchor the shifter tool assembly in the reference position. An extend-retract mechanism within the extension tool can extend move the shifting key on a shifting tool into engagement with a shifting profile on the downhole tool and move the shifting profile to a second position. The downhole tool can be operated by the shifting key moving the shifting profile from an initial position to the second position.

The invention discloses an electro-hydraulic control isolation valve, and belongs to the technical field of petroleum operation equipment, the electro-hydraulic control isolation valve comprises an electric control assembly, a pressure balance assembly, a hydraulic control assembly and an adjusting assembly, the electric control assembly is used for controlling normal work of a device, the pressure balance assembly is installed on the electric control assembly, and the hydraulic control assembly is installed on the hydraulic control assembly. The hydraulic control assembly is installed on the electric control assembly, the adjusting assembly is connected with the hydraulic control assembly, and the hydraulic control device has the advantages of being stable and balanced, intelligent in control, low in energy consumption, flexible in opening and closing, convenient and fast to operate, reliable in operation, simple, convenient and practical.

A motorized zone valve assembly permits the servicing and / or replacement of a motorized zone valve in a hydronic heating and / or cooling system. The motorized zone valve assembly includes isolation valves coupled to the incoming and outgoing ports of the motorized zone valve via union nuts. The isolation valve members can be closed to permit the removal of the motorized zone valve by the loosening of the two union nuts. In addition, the isolation valve coupled to the outgoing port can include a drain valve and drain port to permit the isolation and draining of individual zones of the hydronic system.

The invention discloses a redundancy control device and system for a valve actuating mechanism of a pneumatic isolating valve, and belongs to the technical field of industrial automation and process control. The device comprises a triple gas source supply system which comprises a main gas source, a standby gas source A and a standby gas source B adopting a high-pressure gas storage tank; the distributed intelligent control module comprises a main controller, a hot standby controller and a cold standby controller and adopts a 2oo3 voting mechanism; the triple modular execution mechanism system comprises an electro-pneumatic execution unit, a pure pneumatic execution unit and a mechanical standby execution unit; the invention discloses a self-adaptive fault diagnosis and recovery system. The control system comprises an intelligent self-learning system, an undisturbed switching control system and the like, and has a layered software architecture and a multi-level control strategy. Multiple redundancy is achieved, the reliability of extreme conditions is improved, fault prediction is accurate, response is fast, switching disturbance is small, the method adapts to working condition changes, and the safety and the intelligent level of the system are improved.