486 results about "Shut down valve" patented technology

A flood control device and system which controls conductive fluid(s) in a conductive fluid supply line and or path, using the conductivity of said fluid(s). The conductive fluid system comprises; a conductive fluid supply line, in-line conductive fluid shut-off valve, in-line conductive fluid detector, conductive fluid sensor(s) (attached in or to conductive fluid dependent appliances), a D.C. powered central processing unit, and control panel. The conductive fluid flows through said conductive fluid line, said in-line conductive fluid shut-off valve, intern reaching said in-line conductive fluid detector which detects the flow of conductive fluid, thereby sending data to said central processing unit. When said central processing unit receives said data, said central processing unit delays for a predetermined amount of time (example 3 seconds) waiting to receive data from one or more of said conductive fluid sensor(s). If said central processing unit doesn't receive said data from said conductive fluid sensor(s) within said predetermined, said central processing unit will automatically send data to said in-line conductive fluid shut-off valve, to close, therefore terminating the forward flow of conductive fluid(s). System also includes audible signal(s) to signal an alarm condition, timing mode(s) for water conservation and monitoring in-line conductive fluid shut-off valve movements, a phone notifier for notifying user of said termination of conduct fluid due to a conductive fluid leak detection, and for (user-set) excessive water usage, means for communicating with said central processing unit by way of telephonic communication (to close or re-open said in-line conductive fluid shut-off valve), a battery back up system, and means of operating by way of manual means.

A hydration pouch with a releasable coupling is disclosed. In one embodiment, the hydration pouch is a flexible bag or pouch with a separate inlet and outlet. A hose or tube is provided for a user to draw refreshment from the pouch. A bite valve is provided at one end of the tube to be actuated by a user's teeth. A coupling is provided for attaching and detaching at least a portion of the hose at an opposite end of the hose. The coupling includes a shutoff or check valve that maintains the patency of the pouch when the hose is disconnected. In an alternative embodiment prefilled, disposable hydration pouches are removably coupled to the hose and then disposed and replaced following consumption of the liquid contained therein.

A vehicle body inclination angle regulating unit (17) includes a balancing oil cylinder (10). One chamber of the balancing oil cylinder (10) is connected with an oil tank (5) and an oil source for leveling operation via a first one-way damper valve (8) and an electric controlled switch valve (7), and the other chamber of the balancing oil cylinder (10) is connected with a non-rod chamber of a suspension oil cylinder via an electric controlled shutoff valve (14) and a second one-way damper valve (9). In addition, an automatically-leveling hydropneumatic suspension mechanism includes at least two pairs of suspension oil cylinders (12), vehicle body inclination angle regulating units (17), a vehicle body transverse inclination angle sensor (1) and a control unit (3). Each suspension oil cylinder (12) is correspondingly provided with the vehicle body inclination angle regulating unit (17) including the balancing oil cylinder (10). The present invention realizes effectively dynamic leveling function of different road conditions, especially transverse slopes, of the mobile crane. The mobile crane is provided with simple operation that are all automatically performed by the control unit, which improves driving safety remarkably and prevents an accident of vehicle overturning.

An ESP variable speed drive controller functions in conjunction with a safety logic solver, dedicated pressure sensors and a surface emergency isolation valve, or safety shut-off valve (SSV), to perform a full functional test of the complete wellhead flowline system. The method includes the step of using a plurality of pressure transmitters to monitor the flowline pressure during normal operations and during a full stroke test of the safety shutoff valve and adjusting the speed of the downhole ESP during the test to maintain the pipeline pressure within predetermined safe pressure limits. This wellhead flowline protection system and method utilizes the downhole ESP speed controller and an SSV to ensure that dangerous pressure levels are not reached and provides for full functional safety testing of the wellhead system. The ESP motor speed controller is used to permit functional testing and remove the pressure source from protected downstream flowline piping.

An emergency shut down valve is operated using a pressurized fluid. A pressure transmitter is operably coupleable to the source of pressurized fluid and is configured to receive an indication relative to emergency shut down valve diagnostics. The pressure transmitter responsively captures pressure readings relative to the source of pressurized fluid for a selected duration. In some embodiments, the pressure transmitter may perform diagnostics upon the captured data. In other embodiments, the captured data is provided to an external device for analysis.

The present invention relates to overpressure protection systems and methods for use on a production system for transferring hydrocarbons from a well on the seafloor to a vessel floating on the surface of the sea. The production system includes a subsea well in fluid communication with a turret buoy through a production flowline and riser system. The turret buoy is capable of connecting to a swivel located on a floating vessel. The overpressure protection device is positioned upstream of the swivel, to prevent overpressure of the production swivel and downstream components located on the floating vessel. The device may include one or more shut down valves, one or more sensors, an actuator assembly, and a control processor. Each shut down valve and sensor is coupled to a production flowline. Each of the sensors is capable of generating a signal based upon a pressure sensed within the production flowline. The actuator assembly is connected to each of the shut down valves for operating the shut down valves. The control processor, which may be a programmable logic controller, receives a signal from the sensors and sends a valve control signal to the actuator assembly for operating the shut down valves in response to the received signals.

A valve assembly includes a valve body, a valve element, a valve actuator, and a fluid-operated switch. The valve body defines a flow passage. The valve element is disposed at least partially within the flow passage and is moveable between an open position and a closed position. The valve actuator is coupled to the valve element and is responsive to pressurized fluid supplied thereto and vented therefrom to move the valve element between the open position and the closed position, respectively. The fluid-operated switch has a first fluid inlet, a second fluid inlet, a third fluid inlet, an actuator port, and an actuator vent port. The fluid-operated switch is in fluid communication with the valve actuator and is operable to selectively supply pressurized fluid to the actuator via the actuator port, and vent the pressurized fluid from the actuator via the actuator port and the actuator vent port.

The invention provides a method, device and system for diagnosing fuel evaporation leakage. The method comprises the steps that the current working condition information of a vehicle is obtained; whenit is detected that each item of the parameters of the current working condition is within respective corresponding preset ranges, a carbon shut-off valve is controlled to turn off, and vacuumizing of a fuel pipeline is conducted through a carbon tank electromagnetic valve; the carbon tank electromagnetic valve is controlled to turn off, and whether or not an air pressure variation in a fuel evaporation system exceeds a preset air pressure variation in a preset period of time is determined; if yes, it is determined that fuel evaporation leakage amount of the fuel evaporation system exceeds the standard. According to the method, whether or not the fuel evaporation leakage amount of the fuel evaporation system exceeds the leakage amount of a 1mm equivalent leakage hole can be timely and effectively detected to ensure regulation demands of OBD fuel evaporation leakage of Light Vehicle Pollutant Emission Limits and Measurement Methods (China Sixth Stage) are met.

A fuel cell system according to one aspect of the invention is operated in an ordinary mode and in a gas leakage detection mode. The fuel cell system includes fuel cells, a fuel gas supplier configured to supply a fuel gas to the fuel cells, a shutoff valve provided in a flow path for leading a flow of the fuel gas supply from the fuel gas supplier to the fuel cells and configured to shut off the fuel gas supply, and a variable pressure regulator provided in the flow path between the shutoff valve and the fuel cells to regulate a pressure of the fuel gas in a downstream in a flow direction of the fuel gas supply to a variable pressure value. In the ordinary mode, the fuel cell system sets the pressure value of the variable pressure regulator to an ordinary power generation pressure value for ordinary power generation. In the gas leakage detection mode, on the other hand, the fuel cell system closes the shutoff valve, sets the pressure value of the variable pressure regulator to a higher value than the ordinary power generation pressure value, and performs leakage detection of the fuel gas from the shutoff valve. Such setting of the pressure value in the variable pressure regulator desirably enables high-speed reduction of the fuel gas pressure in the flow path between the shutoff valve and the variable pressure regulator.

A jet pump (14) is inserted between the low-pressure pump and a high-pressure fuel pump (16). A fuel metering unit (20) includes a metering valve (22) which delivers a regulated fuel flow to a feed line (30), and a bypass valve (24) which diverts to a primary intake (14a) of the jet pump the excess fuel flow supplied by the high-pressure pump. An overspeed protection unit (50) includes a control element (54) of the bypass valve (24) which causes said to fully open in the event of an overspeed of the engine. A shutoff and pressurization checkvalve (42) is mounted on the feed line and controlled by a servo-valve (44) having a high-pressure port (44a) brought to the high fuel pressure, a low-pressure port brought to the pressure of the primary intake (14a) of the jet pump and an output setting the pressure in a control chamber (42a) of the shutoff valve (42) to a value between those prevailing at the high pressure and low pressure ports. In the event of overspeed, the restriction imposed by the jet pump causes a pressure rise at the primary intake of the jet pump, hence a pressure rise in the control chamber of the shutoff valve (42), favoring the closing thereof.

A system for on-line testing of an emergency shut-off valve includes a first emergency shut-off valve and a control for initiating a test on the first emergency shut-off valve. The system also includes a fluid actuator for opening and closing the first emergency shut-off valve. A subsystem is also provided for testing the first emergency shut-off valve without fully closing the shut-off valve in response to a signal from the control. In this system, a second solenoid valve bleeds off pressurized fluid to move the emergency shut-off valve from a fully opened to a partially closed position functions as a second emergency shut-off valve. A second emergency shut-off valve is also provided in series with the first emergency shut-off valve and a bypass around the second emergency shut-off valve allows the second emergency shut-off valve to be tested by being fully closed without shutting down the process. The use of the two emergency shut-off valves in series wherein either valve can shut down the process raises the safety integrity level to level 3.

The invention discloses an overflow and well leakage monitoring system and a monitoring method thereof, comprising a monitoring tank, a level meter, an adjusting valve, a check valve, a pump stroke sensor, a grouting pump, a drilling fluid pond and a monitoring control alarm device. The monitoring tank is divided by a partition into main and auxiliary chambers and is connected with a wellhead device, the grouting pump and the drilling fluid pond by being provided with the level meter and different pipe joints, the level meter, the pump stroke sensor and the adjusting valve are connected with the monitoring control alarm device which controls opening and closing of the adjusting valve and start and stop of the grouting pump and monitors in real time and warns on overflow and well leakage. In the drilling fluid cycle process in the shaft, a quick determination can be made on changes in the return flow from inside of the shaft through the speed of change of the liquid level in the auxiliary chamber; full level of the shaft is maintained constantly in the round trip process, eliminating the failure of timely grouting and full grouting; the small cross-sectional area of the monitoring tank, level detection is more flexible and accurate, and overflow and well leakage can be found more timely.

The invention discloses a hydrogen refueling station gas discharging column system which comprises a hydrogen inlet pipe, wherein the hydrogen inlet pipe is sequentially connected with a filter, a pneumatic input valve, a pneumatic output valve, a pneumatic emergency stop valve and a compressor. A manual discharging needle valve, a hydrogen branch safety valve and a one-way valve are connected between the pneumatic input valve and the pneumatic output valve, and the one-way valve is sequentially connected with a pneumatic purging valve and a nitrogen inlet pipeline. The manual discharging needle valve and the hydrogen branch safety valve are connected with an emptying pipeline. A nitrogen connector and a hydrogen connector are arranged, after the system is installed, nitrogen is used for purging the system to remove air in a pipeline, then hydrogen is used for purging the system to remove nitrogen in the pipeline, and the safety of the system is improved through purging of the two loops.

A dispensing tap for liquids includes a body connected to the neck of a container, a dispensing head with an outlet or mouth, and a throat connecting the body to the dispensing head. A shut off valve is configured for sealing engagement with the mouth of the dispensing head, and a piston is axially guided within the dispensing head. The piston includes a periperhal seal slidably engaged with an interior surface of the dispensing head, and a valve stem coupled to the shut off valve. The piston is selectively actuable between a normally closed position an open position. A spring is captured between the piston and the dispensing head normally biasing the piston and shut off valve to the closed position. A vent is in communication with an interior of the body and the vent is opened and closed with movement of the piston and shut off valve.

The invention discloses an injection device capable of adapting to a low-temperature environment in foam drainage gas recovery, which is applied to a water-bearing natural gas field and can overcome the difficulties of removing liquid accumulations of the well shaft in the gas well with accumulated liquids and removing foams in the produced fluids under the conditions of no commercial power supply and low ambient temperature. The technical scheme adopted in the invention is as follows: a liquid feeding pump is connected with ball valves through a pipe and then connected in parallel with a chemical tank I, a chemical tank II and an anti-freezing agent tank through the ball valves; heaters are arranged inside the chemical tanks; tail gas jackets are arranged at the periphery of the chemical tanks; a first quick-acting coupling is connected with a first cut-off valve and a first one-way valve through a pipe and then connected with a first electric contact pressure gauge, a first plunger pump and a first motor; the outlet end of the first plunger pump is connected with the ball valves respectively and then connected with the chemical tanks and the anti-freezing agent tank; a second quick-acting coupling is connected with a second cut-off valve and a second one-way valve through a pipe and then connected with a second electric contact pressure gauge, a second plunger pump and a second motor; the outlet end of the second plunger pump is connected with the chemical tanks; and an oil-fired generator and an electric control system form a circuit system. The injection device has compact structure, is convenient in transportation, is suitable for the actual environments in natural gas field production, and improves the drainage gas recovery effect.

An exemplary system for an interactive water supply management system for use in residential and commercial properties and a method of installation and use are provided. In the preferred embodiment is a system comprising a water consumption sensor capable of being externally mounted to a water meter, circuitry for the collection of water consumption data, a communication system allowing two way communication with a user and a water main valve shutoff. Remote vibration sensors on water pipes or acceleration sensors on manually articulated water valves provide feedback to the system to allow automatic identification of water consumed by each faucet or appliance. The communication system includes a means of two way communication through the manipulation of the water flow rate by the water shut off valve or by a user.

The invention provides an anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, belonging to the field of safe lifesaving and environmental control in confined spaces. The system comprises a carbon dioxide steel cylinder (1), a stop valve (3), a first level throttling valve (4), a first level evaporator (5), a second level throttling valve (6), a second level evaporator (7) and a three-way change valve (8) in sequence, wherein a fist end of the three-way change valve (8) is connected with the second level evaporator (7), a second end of the three-way change valve (8) is connected with a pneumatic fan (9) and a third end of the three-way change valve (8) is connected with a compressed air steel cylinder (10). Due to taking the twice throttling and two level refrigeration measures, the system improves the evaporation temperature of the first level evaporator (5) and the second level evaporator (7), ensures that the evaporation temperature is higher than the freezing point of water, and prevents the icing plug of pipelines and the frosting of the evaporators; and the compressed air steel cylinder (10) is used for driving the pneumatic fan (9) to carry out auxiliary defrosting in extreme cases, thus improving the reliability of the system running.

A leak detection system includes a first water container, a water detection probe disposed in close proximity to the first water container, the probe having a sensing circuit for generating electrical signals when moisture is sensed by the probe, a water input conduit coupled with the first water container for supplying the first water container with water from an external water source, and a water shut-off controller electronically coupled with the detection probe for regulating the supply of water from the eternal source to the first water container in response to the signals generated by the sensing circuit of the probe. The system further includes an electronic shut-off valve, and the electronic controller includes a trigger circuit for converting signals from said probe to signals for operating the shut-off valve. The water detection probe includes a first circuit having conductor means for detecting moisture-inducing electrical resistance changes, and a second circuit for converting said changes into signals for the trigger circuit. The leak detection system may also include a second container for substantially isolating the first water container and the detection probe therewithin. Preferably, the second container comprises a flexible bag having releasable closure means. The shut-off controller is electrically coupled with one or more of a light, an alarm or a buzzer, for alerting a user that a leak has been detected. The shut-off valve is caused to be closed in response to signals generated by said electronic controller. Preferably, the electronic controller includes first circuit means for determining if the strength of the signals from the water detection probe exceed a predetermined value, and second circuit means for generating a water shut-off signal that causes the shut-off valve to be closed.

An air cutoff valve (ACV) is provided. The full open state of the flap valve is maintained using the latchet which operates as the solenoid is turned on and off, so the restart performance is significantly enhanced as the air is quickly supplied by the ACV when the engine stops abnormally irrespective of a driver's intention, and since the ACV is made from a plastic material, the assembling process of the molding formation is simplified, so the unit cost for manufactures is reduced, and the corrosion phenomenon due to moisture can be prevented, and the operation reliability can be enhanced.