33results about How to "Increase control pressure" patented technology

A pressure operated valve is provided including an adjusting device, a spring and a vent connection. The adjusting device is axially movably arranged in a pressure chamber defined in the valve and comprises a valve body and a pressure intensifier. A space between the valve body and valve face defines a valve passage cross section. The spring is operatively arranged for holding the pressure intensifier in a floating arrangement in the pressure chamber. The pressure intensifier has a first side exposed to a pressure in the pressure connection opening and a second side facing away from the pressure connection opening. The second side of the pressure intensifier and the adjusting device define a low pressure chamber within the pressure chamber. The vent connection is an inflow restrictor arranged between the lower pressure chamber and a space having a lower pressure than the low pressure chamber.

A load sensing system includes a first assembly of actuators for controlling a first hydraulic function, a pump adapted to supply the actuators with pressurized hydraulic fluid, an electrically controlled valve adapted to control the output pressure of the pump via a hydraulic signal, a first pressure sensor for detecting a load pressure of the first actuator assembly, and a control unit adapted to receive a signal with information about the load pressure detected by the first pressure sensor and to generate a control signal, corresponding to the detected load pressure, to the electrically controlled valve.

The invention discloses a self-operated sleeve regulating valve, which comprises a valve body, a sleeve, a valve spool, a valve cover, a valve rod, a vertical column, a regulating spring, sealing packing, a packing gland, a thrust ball bearing, an upper pressing plate, an actuator, a spring seat, a packing gasket, a regulating disk, a regulating pad and a connector. A valve cavity is arranged in the valve body, the sleeve and the valve spool matched with the sleeve are mounted in the valve cavity, the valve spool is fixed to the lower end of the valve rod and is capable of vertically moving in the sleeve, the valve cavity is divided into an upper cavity and a lower cavity when the valve spool and the sleeve are sealed, the upper end of the valve rod penetrates through the upper pressing plate and is connected with a push rod of the actuator, and the pressure of the upper valve cavity and the lower valve cavity is balanced under the combined action of the sleeve, the valve spool and the actuator. The self-operated sleeve regulating valve has the advantages of simple and compact structure, high adjustable and controllable pressure, capability of setting online non-interference regulation and the like, and is applicable to automatic regulation and control for the pressure of process pipelines with gas, liquid, steam and the like with pressure needing to be regulated to be higher than or equal to 0.5Mpa.

The invention discloses a device for controlling an electric cooker. The device comprises a first level signal outputting module and a control module, wherein the first level signal outputting module is used for outputting a first level signal; a first port of the control module is connected with the first level signal outputting module; the control module judges whether voltage of a power supply connected with the electric cooker is smaller than preset voltage or not according to the first level signal; and if the voltage of the power supply is smaller than the preset voltage, then the power ratio of the electric cooker can be increased. Accordingly, when a cooking effect is poor, the power ratio of the electric cooker can be increased by the device for controlling the electric cooker, the after-sales problems due to poor cooking effect caused by the using environment can be solved, repairing cost is reduced, and producing and manufacturing costs cannot be increased. The invention also discloses a method for controlling the electric cooker.

The invention relates to a fuel injection valve for injecting a gaseous and/or a liquid fuel into a combustion chamber of an internal combustion engine, comprising a first valve element (3) accommodated such that the frist valve element can perform reciprocating movements in a central bore (1) of a nozzle body (2), and a second valve element (5) accommodated such that the second valve element canperform reciprocating movements in a central bore (4) of the first valve element (3), and control valves (6, 7) for the hydraulic pilot control of the two valve elements (3, 5), wherein each valve element (3, 5) is assigned a control chamber (8, 9), which can be relieved via a control valve (6, 7). According to the invention, a further valve (10), which can be controlled hydraulically via the control valve (6), is arranged at least between a control chamber (8) and a control valve (6) used to relieve the control chamber (8).

The invention discloses a linear-stroke pneumatic actuator. The linear-stroke pneumatic actuator comprises a sealed cavity, an air inlet channel is arranged on one side of the cavity, a piston is arranged in the cavity, a piston rod is arranged in the middle of the piston in a linkage mode, a device which drives a valve to open and close is arranged at one end of the piston rod, which corresponds to a connecting end between the piston rod and the piston, a spring is arranged on the other side of the cavity, the spring abuts against an inner bottom surface of the piston and the cavity, a membrane is installed on the upper portion of the piston, and periphery of the piston and the inner side surface of the cavity are in motive seal fit through the membrane. The fitting structure is adopted, non-contact working of the linear-stroke pneumatic actuator can be achieved, the pneumatic actuator is durable and pressure resistant, and the working time is safe and reliable.

A pipeline-waste-gas reduction method to reduce the amount of gas wasted by existing high-pressure pipelines having existing pipeline controllers and existing actuator-based control valves, by reducing the pressure of gas sent to existing pipeline controllers by a determined factor, consequently reducing the amount of gas wasted by the controllers, and then increasing control pressure returned by the controllers by the same factor, ensuring that the proper control pressure is sent to the existing actuator-based control valves.

The invention relates to a method for operating a fuel injector having two coaxially arranged nozzle needles (1, 2) which are guided one inside the other and which serve for introducing a first fuel,for example natural gas, and a second fuel, for example diesel fuel, into a combustion chamber of an internal combustion engine, in which method the two nozzle needles (1, 2) are opened in a time-offset manner by means of two control valves (3, 4), and the inner nozzle needle (2) is carried along at least over a partial stroke range during the opening of the outer nozzle needle (1). According to the invention, during the activation phase of the control valve (3) assigned to the outer nozzle needle (1) for the purposes of opening the outer nozzle needle (1), the control valve (4) assigned to the inner nozzle needle (2) is at least temporarily likewise activated such that an increase of a control pressure prevailing at the inner nozzle needle (2) is counteracted without opening the inner nozzle needle (2).

The invention refers to an electro-magnetic pressure control valve with a magnetic part and a valve part. The magnetic part has at least on coil that can be electrically triggered, a coil core and an armature guided traversingly. The valve part has a feed for the pressurized medium, a return and a consumer connection. The valve part has at least two seat valves that can be closed each by a valve element.

The invention relates to the technical field of SAGD circulating preheating stage produced fluid treatment, in particular to a two-section separation based SAGD produced fluid treatment method and device. The method is characterized in that high-pressure under-pressure separation and low-pressure flash-evaporation separation are performed on the SAGD produced fluid, and follow-up treatment is thenperformed. A secondary gas-liquid separating process of under-pressure separation and flash-evaporation separation is adopted, wherein the first stage is under-pressure gas-liquid separation with relatively high control pressure, and is mainly used for separating a gas phase carried in the produced fluid, and stabilizing the front end pressure of a collecting and transport system; and the secondstage is used for performing flash-evaporation separation on a first liquid phase, wherein the control pressure is relatively low, the produced fluid is sufficiently subjected to flash-evaporation, the liquid phase is partially gasified and cooled in a flash-evaporation process, and heat exchange difficulty of the liquid phase is greatly reduced; and meanwhile, the gasified gas phase can adopt a more mature gas-liquid heat exchange system, and heat exchange efficiency is higher, so that the SAGD produced fluid is lower in treatment cost.

The invention relates to a pressure sensor, and discloses a pneumatic low-pressure sensor. The pneumatic low-pressure sensor is mainly characterized in that the output end of the sensor adopts a three-way connection tube; a diaphragm and a plurality of adjustment springs are used for pressure setting; one outlet of the three-way connection tube is plugged via a plug head; pressure adjustment is performed by means of pure pneumatic signal feedback; the output end of the sensor is controlled by the pressure of a gas which is possible to leak in a shell; displacement for the shell is increased or reduced via a pressure adjustment valve connected with the shell, and then the pressure in the shell is always controlled to fluctuate in the range of plus/minus 5% of the set values (ranging from 100 Pa to 2000 Pa) of the sensor.